JP2019078272A - Pd (pdocj) system and pd joint, group of additional 4 pd joints related to pd part, service tee and pd part in which less part of service tee is left behind when removing feed pipe of ef joint, ef part and welding face and cut plane by cutting work, and relationship between outer diameter and inner diameter of welding face - Google Patents

Abstract

To provide an easily-used and cost-saving service tee having the minimum left-behind part so as to solve a problem of a conventional technique of removing a feed pipe in which most part of the service tee body is left behind since the technique uses means for cutting the feed pipe in short portions while suppressing as much outflow of gas as possible by pressing-down a built-in hole saw and closing a take-out part of the feed pipe by welding a cap or a plug, and further, much work material is required to remove the service tee body and newly install a bypass and a pipe.SOLUTION: A service tee of the present invention uses a means for reducing a left-behind portion by cut out a large-diameter joint sealing part and a feed pipe connecting part, shaving out three welding faces, and welding and fixing a PD part having the three welding faces and EF part. A service tee is provided which allows an easy removing work, which do not require a by-pass construction and other work material, and which is cost-saving, and which has the minimum left-behind portion.SELECTED DRAWING: Figure 7

Description

The present invention is a PD joint which is a synthetic resin pipe joint such as polyethylene and vinyl chloride, a service of an EF joint, a PD part for closing an opening, and an EF part which is made of synthetic resin by EF bonding or PD bonding. The present invention relates to a service team which is integrally integrated to close an opening port of a joint by welding and fixing.

Furthermore, the present invention is an additional matter regarding a series of PD junctions of Patent Document 3 described in the prior art document and the applied Patent Documents 2 and 3 and Patent document 4 which are prior documents of the patent document. And, the 2-letter PD of the head used for PD joint and PD joint and PD parts and PD terminal and PD wire etc. is named from PDOCJ of Non Patent Literature.

In addition, when the supply pipe is abolished, the service coupling of the PD joint and the EF joint is a small diameter joining the PD parts and the EF parts that close the opening of the small diameter joint sealing part to the small diameter joint sealing part The present invention relates to service joints of a PD joint and an EF joint characterized by cutting out and deploying three consecutive welding surfaces of a small diameter joint including a hollow chamfered surface welding surface of a chamfered portion. (Invention 1)

In addition, service ties of the PD joint and the EF joint continuously deploy two seals of a hollow large diameter joint seal portion and a hollow small diameter joint seal portion, and the large diameter joint faces in the direction of the synthetic resin pipe. The sealing portion axis and the small diameter joint sealing portion axis are continuously disposed on the joint opening axis, and further, the axis of three welding surfaces including the welding surface of the chamfered surface is around the opening opening The present invention relates to a service coupling of a PD joint and an EF joint characterized by being continuously deployed on the opening side of the opening. (Invention 2)

In addition, the supply pipe connection in the service of the PD joint and the EF joint is disposed in the small diameter joint female thread, and further, is characterized in a structure disposed between the small diameter upper end flange and the large diameter joint seal. It relates to the service team of PD joint and EF joint. (Invention 3)

Also, the no blow back attachment parts in the service joints of the PD joint and the EF joint are individually disposed on the outer peripheral surfaces of the two large seal joints of the hollow large diameter joint seal and the hollow small diameter joint seal, The present invention relates to service of a PD joint and an EF joint characterized by a method of using a large diameter no blow back attachment at the time of new construction and further using a small diameter no blow back attachment at the time of abolition. (Invention 4)

In addition, PD parts and EF parts that close the large diameter opening and the small diameter opening in service joints of PD joints and EF joints have a cylindrical welding surface outer diameter that is greater than the external thread outer diameter deployed on the parts It is characterized in that it is characterized by providing a plane which intersects or is orthogonal to the male screw axis or between the cylindrical welding surface and the screw, and three corresponding to the three welding surfaces of the part. A PD joint characterized by having a welding surface and a plane orthogonal to or intersecting with the screw shaft and having a structure in which the inner diameter of the large diameter hollow cylindrical inner peripheral surface welding surface of the joint is larger than the diameter of the large diameter female thread For service fittings of EF fittings. (Invention 5)

In addition, when the supply pipe is abolished, the service couplings of the PD joint and the EF joint have three welded surfaces in which the small-diameter joint that has been cut out is continuous, and a cylinder that is continuous with the hollow chamfered surface welded surface of the chamfered portion in the welded surface. The inner diameter of the hollow inner peripheral surface welding surface is related to the service of the PD joint and the EF joint having features larger than the diameter of the female thread of the hollow small diameter joint female thread portion. (Invention 6)

In addition, the sealing parts in the service joints of PD joints and EF joints are hollow large-diameter joint sealing parts in which the hollow large-diameter joint top fixing portion with large inner diameter, large-diameter joint inclined portion, and large-diameter joint female screw portion In addition, it relates to service joints of a PD joint and an EF joint characterized by a structure in which a hollow small-diameter joint fixing upper portion having a small inner diameter and a small-diameter joint inclined portion and a small-diameter joint female screw are deployed in a hollow small-diameter joint sealing portion . (Invention 7)

In addition, although the service team of PD joints and EF joints determines whether or not to install a group of pressure suppression safety devices according to the environment such as temperature and humidity at the time of welding (in consideration of the latitude and regional points) Inventions characterized by a construction capable of equipping the large diameter pressure suppression safety device with the large diameter pressure suppression safety device mounting recess at the time of new construction and further providing the small diameter pressure suppression safety device with the small diameter pressure suppression safety device mounting recess when discontinuing The present invention relates to the service joints of the PD joint and the EF joint according to the invention 2 and the invention 3 and the invention 4 and the invention 5 and the invention 6 and the invention 7 and 7 respectively. (Invention 8)

In addition, in the service joints of PD joints and EF joints, the large diameter joint cylindrical hollow inner peripheral surface welding surface deployed at the time of product is characterized by a structure that abuts on a plane orthogonal to or intersects with the large diameter joint female thread axis Further, the welding surface of the small diameter cylindrical hollow inner peripheral surface cut out at the time of retirement is related to the service of the PD joint and the EF joint characterized in that it abuts against a cutting plane advanced or intersected or orthogonal to the axis of the small joint. (Invention 9)

In addition, service joints of the PD joint and the EF joint include welding surfaces of a large diameter joint sealing portion axis and a small diameter joint sealing portion axis, and a chamfered surface for joining the PD component and the EF component closing the opening. A PD joint characterized by a structure in which a plurality of welding face axes are continuous on one axis, and a PD joint that closes the opening and a line that is collinear with the axis of the EF part, and an EF joint Related to the service team. (Invention 10)

In addition, service ties of the PD joint and the EF joint are provided with two hollow seals of a hollow large diameter joint seal and a hollow small diameter joint seal, and the large diameter hollow joint seal is large. The present invention relates to a service coupling of a PD joint and an EF joint characterized by a structure in which a small diameter upper end flat portion of a diameter upper end flat portion and a hollow small diameter joint sealing portion is provided. (Invention 11)

In addition, in the service team of PD joints and EF joints, when the supply pipe is abolished, the upper fixed portion and the small diameter side portion of the small diameter joint sealing portion which is hollow and the inclined portion and the small diameter slope portion of the small diameter joint sealing portion which is hollow However, by acting in contact with each other, the upper fixed portion and the large diameter side surface portion of the large diameter joint sealing portion which is hollow at the time of new construction and the inclined portion and the large diameter slope of the large diameter joint sealing portion which is hollow are The present invention relates to a service coupling of a PD joint as well as an EF joint characterized by a structure in which the parts function to contact each other to prevent gas outflow from the conduit. (Invention No. 12)

In addition, the service of the PD joint and the EF joint can prevent combustion when the PD part and the EF part are joined immediately after the prevention of gas outflow from the conduit by the action of the cotter and the sealing part. Inventions 1 and 2 and 2 and 3 and 4 and inventions 4 have features that do not lead to catastrophes even if an ignition source such as a spark is generated because the gas which is one of the three elements is excluded. The present invention relates to the serviceee of the PD joint and the EF joint according to the fifth invention, the sixth invention, the seventh invention, the eighth invention, the ninth invention, the tenth invention, the eleventh invention, and the twelfth invention. (Invention 13)

In addition, service joints of PD joints and EF joints relate to service joints of PD joints and EF joints characterized by a structure without the need to incorporate a hole saw. (Invention No. 14)

In addition, service joints of PD joints and EF joints have a hollow chamfered surface welding surface of at least a C-chamfered portion or an R-chamfered portion, and a flat welding surface of an upper end portion or a cylindrical hollow inner circumferential surface There are two welding surfaces in which the welding surfaces are individually continuous, or the welding surfaces have three welding surfaces in which both the flat welding surface of the upper end or the cylindrical hollow inner circumferential surface welding surface are continuous. And a PD component and an EF component having a welding surface corresponding to the welding surface are systematically integrated with the synthetic resin by PD bonding and EF bonding, and the opening of the joint is closed by welding and fixing. The present invention relates to a service coupling of a PD joint and an EF joint characterized by the following structure. (Invention 15)

In addition, for the service joints of PD joints and EF joints, from the plastic tube side, in the small-diameter joint sealing portion, the small-diameter joint sealing portion opening axis, the small-diameter joint inclined portion axis, and the small-diameter joint top The small diameter joint female thread portion axis is continuously arranged on the same small diameter axis, and further, in the large diameter joint seal portion, the large diameter joint sealing portion opening axis, the large diameter joint inclined portion axis and the large diameter joint The upper part fixed to the top and the large diameter joint female screw axis are continuously arranged on the same large diameter axis, and further, the hollow chamfered surface of the large diameter joint cylindrical hollow inner peripheral surface welding face axial center and the large diameter joint chamfered portion The welding surface axis and the flat welding surface axis of the upper end of the large diameter joint are continuously arranged on the same large diameter welding surface axis, and the three axes are arranged in order and coincide with the joint opening axis The present invention relates to a service coupling of a PD joint and an EF joint characterized by the following structure. (Invention No. 16)

In addition, in the service coupling which is a PD joint and an EF joint used when the main branch pipe other than the supply pipe is taken out from the large-diameter main branch pipe, means for increasing the welding area with the conduit to increase the welding strength is a pair of PD terminals Alternatively, the present invention relates to a service connection of a PD joint and an EF joint characterized by a structure in which a plurality of blocks are arranged as a block and an EF terminal and a PD line or EF line connecting between the pair of terminals are increased. (Invention No. 17)

In addition, in the service coupling which is a PD joint and an EF joint used when taking out the main branch other than the supply pipe from the large-diameter main branch, an auxiliary structure of means for increasing the welding area with the conduit to increase the welding strength is In order to increase the strength of the joint, the layout area of PD lines and EF lines increases, and with the deployment of multiple blocks, the indicator deploys multiple indicators and multiple blocks having a staggered configuration or the like. Qi, which is a PD joint and an EF joint in the form of having the characteristics of (Invention No. 18)

In addition, in the service coupling which is a PD joint and an EF joint, the molten synthetic resin of the cylindrical welding surface is orthogonal to the connection axis of the connection cut by a flat cutting blade which cuts the inner surface of the female screw and the connection. The pressure on the melted and expanded synthetic resin can be kept high without being involved in the vertical direction or the horizontal direction by impinging on the intersecting surfaces and flowing out to the female screw portion and the connection portion, and the cylindrical weld portion strength can be maintained. Relates to a service coupling that is a PD joint and an EF joint having features that can ensure (Invention No. 19)

Further, in PD parts and EF parts, the molten synthetic resin of the cylindrical welding face which is one of the three welding faces is a flat surface which cuts the inner surface of the female thread and the connecting part in the service fitting which is a PD joint and an EF joint. It is prevented from flowing out to the female thread and the connecting part by abutting on a plane orthogonal to or intersecting with the axial center of the connecting part cut off by the cutting blade, and it melts and expands regardless of vertical or horizontal direction The pressure of the synthetic resin can be kept high, and the joint openings are structurally integrated with the synthetic resin by the PD joint and the EF joint by PD parts and EF parts having features that can secure the columnar welded part strength by the joint The present invention relates to a service coupling which is a PD joint and an EF joint characterized in that an opening port is closed by welding and fixing. (Invention 20)

In addition, the cutting tool used in the work process for cutting out three welding surfaces is a flat welding surface cutting edge for cutting a flat welding surface and a chamfered welding surface cutting edge for cutting a welding surface of a chamfered surface and a cylindrical welding surface Cutting edge of cylindrical hollow inner peripheral surface welding surface cutting surface cutting edge and female thread part, cutting edge of cutting edge which cuts away a plane crossing or orthogonal to the axis center cutting the inner surface of the connection part The present invention relates to a structure of a cutting tool which deploys a set, and relates to a structure of a cutting tool which can cut out a plane which intersects or is orthogonal to three hollow welding surfaces and an axial center while rotating the cutting tool. (Invention No. 21)
And
The present invention relates to a service coupling which is a PD joint and an EF joint characterized by the structure of a welding surface obtained by cutting out three welding surfaces with the cutting tool having the structure. (Invention No. 22)

In addition, since the service fitting, which is a PD joint and an EF joint, reliably prevents gas outflow by the action of the sealing portion and the top, the PD joint and the EF joint opening and the PD part and the collar part of the EF part The present invention relates to a service coupling which is a PD joint and an EF joint characterized by a structure in which a sheet packing or the like is disposed therebetween, and the part is screwed to temporarily seal the opening to perform temporary embedding. (Invention No. 23)

In addition, the PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are one wire connecting between a pair of terminals, and the pair of terminals and one wire connecting are one block. The present invention relates to a service coupling which is a PD joint and an EF joint characterized by a block or multiple block deployment structure. (Invention No. 24)

In addition, the PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are characterized by the arrangement structure of the PD line characterized by a spiral and corrugated or lightning type arrangement example and a spiral or circular arrangement example. It relates to the service team which is a PD joint and an EF joint. (Invention No. 25)

In addition, PD lines and EF lines in PD parts and EF parts are characterized by the arrangement structure of PD lines characterized by spiral and corrugated or lightning-shaped arrangement examples and spiral or circular arrangement examples. The present invention relates to a service coupling which is a PD joint and an EF joint characterized by a structure in which a part is used to close an opening. (Invention No. 26)

In addition, the supply pipe connection portion in the service coupling of the PD joint and the EF joint is disposed in the small diameter joint female thread, and further characterized by a structure disposed between the small diameter upper end flange portion and the small diameter joint seal portion. For service joints of fittings and EF fittings. (Invention 27)

Patent Document 1 of the prior art discloses that in a service team incorporating a hole saw, a fusion plug can be welded to a spigot portion to close the spigot portion, thereby shortening unnecessary piping when removing a pipe. Has been proposed.

Patent Document 2 of the prior art proposes a service team that does not incorporate a hole saw, and it is further proposed to close the opening of the service tray by joining EF parts.

Furthermore, service tees that do not use the elastic force of the O-ring as a gas outflow prevention means have been proposed.

Patent Document 3 of the prior art proposes a part having three welding surfaces in PD parts and EF parts.

Furthermore, in PD joints and EF joints, joints having three welding surfaces have been proposed. Furthermore, an arrangement structure of a plurality of indicators with PD lines arranged in a plurality of blocks is proposed for a joint having a socket-like welding surface.

Patent Document 1: JP 2009-97657 A fusion plug Japanese Patent Application No. 2016-171255 Service Qi Japanese Patent Application No. 2017-143141 Additional 3 pages JP-A-2017-81172 EF parts

In view of the background art, in all the literatures of the prior art and all of the prior art, the service joints of the PD joint and the EF joint at the time of abolition of the supply pipe are small diameter joint sealing to the small diameter joint sealing portion PD joint and EF joint characterized by cutting out and welding out three consecutive welding surfaces of a small diameter joint including a hollow chamfered surface welding surface of a small diameter chamfered portion joining an PD part and an EF part closing the opening of the part The issue is the service team at the fitting. (Issue 1)

In addition, service ties of the PD joint and the EF joint continuously deploy two seals of a hollow large diameter joint seal portion and a hollow small diameter joint seal portion, and the large diameter joint faces in the direction of the synthetic resin pipe. The sealing portion axis and the small diameter joint sealing portion axis are continuously disposed on the joint opening axis, and further, the axis of three welding surfaces including the welding surface of the chamfered surface is around the opening opening The present invention relates to a service connection of a PD joint and an EF joint characterized by being continuously provided on the opening side of an opening. (Issue 2)

In addition, the supply pipe connection in the service of the PD joint and the EF joint is disposed in the small diameter joint female thread, and further, is characterized in a structure disposed between the small diameter upper end flange and the large diameter joint seal. The service team for PD joints and EF joints is an issue. (Issue 3)

Also, the no blow back attachment parts in the service joints of the PD joint and the EF joint are individually disposed on the outer peripheral surfaces of the two large seal joints of the hollow large diameter joint seal and the hollow small diameter joint seal, A large-diameter no-blow-back attachment is used at the time of new establishment, and a service challenge of a PD joint and an EF joint characterized by a method of using a small-diameter no-blow-back attachment at the time of abolition is provided. (Issue 4)

In addition, PD parts and EF parts that close the large diameter opening and the small diameter opening in service joints of PD joints and EF joints have a cylindrical welding surface outer diameter that is greater than the external thread outer diameter deployed on the parts It is characterized in that it is characterized by providing a plane which intersects or is orthogonal to the male screw axis or between the cylindrical welding surface and the screw, and three corresponding to the three welding surfaces of the part. A PD joint characterized by having a welding surface and a plane orthogonal to or intersecting with the screw shaft and having a structure in which the inner diameter of the large diameter hollow cylindrical inner peripheral surface welding surface of the joint is larger than the diameter of the large diameter female thread The service team of the EF joint will be the subject. (Issue 5)

In addition, when the supply pipe is abolished, the service couplings of the PD joint and the EF joint have three welded surfaces in which the small-diameter joint that has been cut out is continuous, and a cylinder that is continuous with the hollow chamfered surface welded surface of the chamfered portion in the welded surface. The inner diameter of the hollow inner peripheral surface welding surface has a problem of service of a PD joint and an EF joint having features larger than the diameter of the female thread of the hollow small diameter joint female thread portion. (Issue 6)

In addition, the sealing parts in the service joints of PD joints and EF joints are hollow large-diameter joint sealing parts in which the hollow large-diameter joint top fixing portion with large inner diameter, large-diameter joint inclined portion, and large-diameter joint female screw portion Deploy and further service the PD joint and EF joint characterized by the structure where the hollow small diameter joint fixed upper portion with small inner diameter and the small diameter joint inclined portion and the small diameter joint female screw portion are deployed in the hollow small diameter joint sealing portion It will be an issue. (Issue 7)

In addition, although the service team of PD joints and EF joints determines whether or not to install a group of pressure suppression safety devices according to the environment such as temperature and humidity at the time of welding (in consideration of the latitude and regional points) When installing a large diameter pressure suppression safety device into the large diameter pressure suppression safety device mounting recess, and when abolishing a small diameter pressure suppression safety device can be equipped with the small diameter pressure suppression safety device mounting recess feature PD joint and EF The issue is the service team at the fitting. (Issue 8)

In addition, in the service joints of PD joints and EF joints, the large diameter joint cylindrical hollow inner peripheral surface welding surface deployed at the time of product is characterized by a structure that abuts on a plane orthogonal to or intersects with the large diameter joint female thread axis Furthermore, the welding surface of the small-diameter cylindrical hollow inner circumferential surface cut off at the time of retirement is a problem in PD joints and EF joints characterized by a structure in which it abuts on an advanced plane which intersects or intersects the axis of the small diameter joint female thread I assume. (Issue 9)

In addition, service joints of the PD joint and the EF joint include welding surfaces of a large diameter joint sealing portion axis and a small diameter joint sealing portion axis, and a chamfered surface for joining the PD component and the EF component closing the opening. A PD joint characterized by a structure in which a plurality of welding face axes are continuous on one axis, and a PD joint that closes the opening and a line that is collinear with the axis of the EF part, and an EF joint Challenges the service team. (Issue 10)

In addition, service ties of the PD joint and the EF joint are provided with two hollow seals of a hollow large diameter joint seal and a hollow small diameter joint seal, and the large diameter hollow joint seal is large. An object of the present invention is to provide service for a PD joint and an EF joint characterized by a structure in which a small diameter upper end flat portion of a diameter upper end flat portion and a hollow small diameter joint sealing portion is provided. (Issue 11)

In addition, in the service team of PD joints and EF joints, when the supply pipe is abolished, the upper fixed portion and the small diameter side portion of the small diameter joint sealing portion which is hollow and the inclined portion and the small diameter slope portion of the small diameter joint sealing portion which is hollow However, by acting in contact with each other, the upper fixed portion and the large diameter side surface portion of the large diameter joint sealing portion which is hollow at the time of new construction and the inclined portion and the large diameter slope of the large diameter joint sealing portion which is hollow are An object of the present invention is to provide service of a PD joint and an EF joint characterized by a structure in which the parts function to contact each other to prevent gas outflow from the conduit. (Issue 12)

In addition, the service of the PD joint and the EF joint can prevent combustion when the PD part and the EF part are joined immediately after the prevention of gas outflow from the conduit by the action of the cotter and the sealing part. Since the gas which is one of the three elements is excluded, the service challenge of the PD joint and the EF joint having characteristics that will not lead to a disaster even if an ignition source such as a spark is generated is an issue. (Issue 13)

In addition, the service of the PD joint and the EF joint can prevent combustion when the PD part and the EF part are joined immediately after the prevention of gas outflow from the conduit by the action of the cotter and the sealing part. Since the gas which is one of the three elements is excluded, the service challenge of the PD joint and the EF joint having characteristics that will not lead to a disaster even if an ignition source such as a spark is generated is an issue. (Issue 13)

In addition, service joints of PD joints and EF joints relate to service joints of PD joints and EF joints characterized by a structure without the need to incorporate a hole saw. (Invention No. 14)

In addition, service joints of PD joints and EF joints have a hollow chamfered surface welding surface of at least a C-chamfered portion or an R-chamfered portion, and a flat welding surface of an upper end portion or a cylindrical hollow inner circumferential surface There are two welding surfaces in which the welding surfaces are individually continuous, or the welding surfaces have three welding surfaces in which both the flat welding surface of the upper end or the cylindrical hollow inner circumferential surface welding surface are continuous. And a PD component and an EF component having a welding surface corresponding to the welding surface are systematically integrated with the synthetic resin by PD bonding and EF bonding, and the opening of the joint is closed by welding and fixing. The service challenge of PD joints and EF joints characterized by (Issue 15)

In addition, for the service joints of PD joints and EF joints, from the plastic tube side, in the small-diameter joint sealing portion, the small-diameter joint sealing portion opening axis, the small-diameter joint inclined portion axis, and the small-diameter joint top The small diameter joint female thread portion axis is continuously arranged on the same small diameter axis, and further, in the large diameter joint seal portion, the large diameter joint sealing portion opening axis, the large diameter joint inclined portion axis and the large diameter joint The upper part fixed to the top and the large diameter joint female screw axis are continuously arranged on the same large diameter axis, and further, the hollow chamfered surface of the large diameter joint cylindrical hollow inner peripheral surface welding face axial center and the large diameter joint chamfered portion The welding surface axis and the flat welding surface axis of the upper end of the large diameter joint are continuously arranged on the same large diameter welding surface axis, and the three axes are arranged in order and coincide with the joint opening axis The service challenge of PD joints and EF joints characterized by (Issue No. 16)

In addition, in the service coupling which is a PD joint and an EF joint used when the main branch pipe other than the supply pipe is taken out from the large-diameter main branch pipe, means for increasing the welding area with the conduit to increase the welding strength is a pair of PD terminals Alternatively, using a PD wire or EF wire connecting between the EF terminal and the pair of terminals as one block, multiple blocks of the block are arranged to increase the joint strength, and the service challenge of the PD joint and the EF joint is addressed I assume. (Issue 17)

In addition, in the service coupling which is a PD joint and an EF joint used when taking out the main branch other than the supply pipe from the large-diameter main branch, an auxiliary structure of means for increasing the welding area with the conduit to increase the welding strength is In order to increase the strength of the joint, as the arrangement area of the PD line and the EF line increases, the indicator has a characteristic of a structure in which a plurality of indicators and a plurality of blocks are arranged in a staggered arrangement or the like. And the service team that is the EF joint. (Issue 18)

In addition, in the service coupling which is a PD joint and an EF joint, the molten synthetic resin of the cylindrical welding surface is orthogonal to the connection axis of the connection cut by a flat cutting blade which cuts the inner surface of the female screw and the connection. The pressure on the melted and expanded synthetic resin can be kept high without being involved in the vertical direction or the horizontal direction by impinging on the intersecting surfaces and flowing out to the female screw portion and the connection portion, and the cylindrical weld portion strength can be maintained. The service team, which is a PD joint and an EF joint with features that can ensure (Issue 19)

Further, in PD parts and EF parts, the molten synthetic resin of the cylindrical welding face which is one of the three welding faces is a flat surface which cuts the inner surface of the female thread and the connecting part in the service fitting which is a PD joint and an EF joint. It is prevented from flowing out to the female thread and the connecting part by abutting on a plane orthogonal to or intersecting with the axial center of the connecting part cut off by the cutting blade, and it melts and expands regardless of vertical or horizontal direction The pressure of the synthetic resin can be kept high, and the joint openings are structurally integrated with the synthetic resin by the PD joint and the EF joint by PD parts and EF parts having features that can secure the columnar welded part strength by the joint An object of the present invention is a service coupling which is a PD joint and an EF joint characterized in that the opening port is closed by welding and fixing. (Issue 20)

In addition, the cutting tool used in the work process for cutting out three welding surfaces is a flat welding surface cutting edge for cutting a flat welding surface and a chamfered welding surface cutting edge for cutting a welding surface of a chamfered surface and a cylindrical welding surface Cutting edge of cylindrical hollow inner peripheral surface welding surface cutting surface cutting edge and female thread part, cutting edge of cutting edge which cuts away a plane crossing or orthogonal to the axis center cutting the inner surface of the connection part It is a structure of a cutting tool which deploys a set, and a structure of the cutting tool which can cut out a plane which intersects or is orthogonal to the three hollow welding surfaces and the axis while pushing the cutting tool is made a problem. (Issue 21)
And
The service challenge which is a PD joint and an EF joint characterized by the structure of the welding surface where three welding surfaces are cut out with the cutting tool of the structure concerned is made a subject. (Issue 22)

In addition, since the service fitting, which is a PD joint and an EF joint, reliably prevents gas outflow by the action of the sealing portion and the top, the PD joint and the EF joint opening and the PD part and the collar part of the EF part A sheet of service such as a PD joint and an EF joint characterized by a structure in which a sheet packing or the like is disposed therebetween, and the part is screwed to temporarily seal the opening to make temporary embedding possible. (Issue 23)

In addition, the PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are one wire connecting between a pair of terminals, and the pair of terminals and one wire connecting are one block. The problem is a service team that is a PD joint and an EF joint characterized by a block or multiple block deployment structure. (Issue 24)

In addition, the PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are characterized by the arrangement structure of the PD line characterized by a spiral and corrugated or lightning type arrangement example and a spiral or circular arrangement example. The subject is service team that is PD joint and EF joint. (Issue 25)

In addition, PD lines and EF lines in PD parts and EF parts are characterized by the arrangement structure of PD lines characterized by spiral and corrugated or lightning-shaped arrangement examples and spiral or circular arrangement examples. The problem is the service team, which is a PD joint and an EF joint characterized by a structure in which the opening is closed using parts. (Issue 26)

In addition, the supply pipe connection portion in the service coupling of the PD joint and the EF joint is disposed in the small diameter joint female thread, and further characterized by a structure disposed between the small diameter upper end flange portion and the small diameter joint seal portion. The service team of joints and EF joints will be the subject. (Issue 27)

The problems described above are problems for solving the problems of the following prior documents.
According to Patent Document 1 of the prior art, welding plugs are welded to a spigot portion to close unnecessary openings of service holes used for taking out at the time of supply pipe abolition. However, when occluding and burying, almost the entire body of the Service body becomes the remaining part, and there is a problem that it is desired to make the remaining part smaller. (Whole task 1)

In addition, when joining the fusion plug to the EF part, gas leakage from the perforated portion can be covered by lowering the built-in hole saw, but since there is a gap, gas leakage is substantially prevented. Along with that, there is a problem that there are gases that become three elements of combustion near the EF line where the current flows at the time of joining, and it is difficult to ensure reliable safety, and this problem is to be solved. (Whole task 2)

Also, in order to stop leakage completely, bypass saddles for blocking back and bypass saddles for security bypass are respectively required on the conduits at both ends of the service team, and a lot of construction materials are required. Furthermore, the drilling area at the time of retirement will increase and the drilling volume will also increase. There is a problem that this leads to an increase in construction cost, and the problem is to be solved. (Whole task 3)

Next, in Patent Document 2 of the prior art, unlike the gas outflow preventing means by the action of the elastic force of the O-ring, a serviceee that welds the EF parts and integrates the opening with synthetic resin to close the opening Proposed. However, since only the flat surface of the back of the flange of the part is welded, it is necessary to propose means for more reliably closing the opening by welding other parts. We will make this proposal an issue. (Whole task 4)

Moreover, in the document, there is no device at the time of the abolition of the supply pipe. Therefore, this device is an issue. (Whole task 5)

Next, in Patent Document 3 of the prior art, an opening in a service coupling which is a PD joint and an EF joint is integrated with a synthetic resin, and PD and EF are joined with three welding surfaces which can be sealed permanently. PD parts and EF parts have been proposed. However, since there was a shortage in the content of the proposal, we will make the supplement its subject. (Whole task 6)

In the present invention, as means for solving the problem, when the supply pipe is abolished, the service coupling of the PD joint and the EF joint closes the opening of the small diameter joint sealing portion to the small diameter joint sealing portion to be left. A small diameter joint including a hollow chamfered surface welding surface of a small diameter chamfered portion for joining a PD part and an EF part is cut out and deployed with three consecutive welding faces of the small diameter joint . (Means 1)

In addition, service ties of the PD joint and the EF joint continuously deploy two seals of a hollow large diameter joint seal portion and a hollow small diameter joint seal portion, and the large diameter joint faces in the direction of the synthetic resin pipe. The sealing portion axis and the small diameter joint sealing portion axis are continuously disposed on the joint opening axis, and further, the axis of three welding surfaces including the welding surface of the chamfered surface is around the opening opening , And a service connection of a PD joint and an EF joint characterized by being continuously provided on the opening side of the opening. (Means 2)

In addition, the supply pipe connection in the service of the PD joint and the EF joint is disposed in the small diameter joint female thread, and further, is characterized in a structure disposed between the small diameter upper end flange and the large diameter joint seal. The service will be used as a PD joint and an EF joint. (Means 3)

Also, the no blow back attachment parts in the service joints of the PD joint and the EF joint are individually disposed on the outer peripheral surfaces of the two large seal joints of the hollow large diameter joint seal and the hollow small diameter joint seal, A large diameter no blow back attachment is used at the time of new construction, and when it is no longer available, the service of a PD joint and an EF joint characterized by a method of using a small diameter no blow back attachment is used. (Means 4)

In addition, PD parts and EF parts that close the large diameter opening and the small diameter opening in service joints of PD joints and EF joints have a cylindrical welding surface outer diameter that is greater than the external thread outer diameter deployed on the parts It is characterized in that it is characterized by providing a plane which intersects or is orthogonal to the male screw axis or between the cylindrical welding surface and the screw, and three corresponding to the three welding surfaces of the part. A PD joint characterized by having a welding surface and a plane orthogonal to or intersecting with the screw shaft and having a structure in which the inner diameter of the large diameter hollow cylindrical inner peripheral surface welding surface of the joint is larger than the diameter of the large diameter female thread The service will be used as an EF joint. (Means 5)

In addition, when the supply pipe is abolished, the service couplings of the PD joint and the EF joint have three welded surfaces in which the small-diameter joint that has been cut out is continuous, and a cylinder that is continuous with the hollow chamfered surface welded surface of the chamfered portion in the welded surface. The inner diameter of the hollow inner peripheral surface welding surface takes the form of service of a PD joint and an EF joint having features larger than the diameter of the female thread of the hollow small diameter joint female thread portion. (Means 6)

In addition, the sealing parts in the service joints of PD joints and EF joints are hollow large-diameter joint sealing parts in which the hollow large-diameter joint top fixing portion with large inner diameter, large-diameter joint inclined portion, and large-diameter joint female screw portion Deploy and further service the PD joint and EF joint characterized by the structure where the hollow small diameter joint fixed upper portion with small inner diameter and the small diameter joint inclined portion and the small diameter joint female screw portion are deployed in the hollow small diameter joint sealing portion It is a means. (Measure 7)

In addition, although the service team of PD joints and EF joints determines whether or not to install a group of pressure suppression safety devices according to the environment such as temperature and humidity at the time of welding (in consideration of the latitude and regional points) When installing a large diameter pressure suppression safety device into the large diameter pressure suppression safety device mounting recess, and when abolishing a small diameter pressure suppression safety device can be equipped with the small diameter pressure suppression safety device mounting recess feature PD joint and EF Use the service team of the joint as a means. (Means 8)

In addition, in the service joints of PD joints and EF joints, the large diameter joint cylindrical hollow inner peripheral surface welding surface deployed at the time of product is characterized by a structure that abuts on a plane orthogonal to or intersects with the large diameter joint female thread axis Furthermore, the welding surface of the small-diameter cylindrical hollow inner circumferential surface cut off at the time of retirement is characterized by a structure in which the small-diameter joint abuts on a cutting plane which intersects or is orthogonal to the axial center I assume. (Measure 9)

In addition, service joints of the PD joint and the EF joint include welding surfaces of a large diameter joint sealing portion axis and a small diameter joint sealing portion axis, and a chamfered surface for joining the PD component and the EF component closing the opening. A PD joint characterized by a structure in which a plurality of welding face axes are continuous on one axis, and a PD joint that closes the opening and a line that is collinear with the axis of the EF part, and an EF joint Use the service team of (Measure 10)

In addition, service ties of the PD joint and the EF joint are provided with two hollow seals of a hollow large diameter joint seal and a hollow small diameter joint seal, and the large diameter hollow joint seal is large. A service contact of a PD joint and an EF joint characterized by a structure in which a diameter upper end flat portion and a small diameter upper end flat portion of a hollow small diameter joint sealing portion are provided is used as a means. (Means 11)

In addition, in the service team of PD joints and EF joints, when the supply pipe is abolished, the upper fixed portion and the small diameter side portion of the small diameter joint sealing portion which is hollow and the inclined portion and the small diameter slope portion of the small diameter joint sealing portion which is hollow However, by acting in contact with each other, the upper fixed portion and the large diameter side surface portion of the large diameter joint sealing portion which is hollow at the time of new construction and the inclined portion and the large diameter slope of the large diameter joint sealing portion which is hollow are The parts are characterized by a structure in which gas outflow from the conduit is prevented by acting in contact with each other. (Means 12)

In addition, the service of the PD joint and the EF joint can prevent combustion when the PD part and the EF part are joined immediately after the prevention of gas outflow from the conduit by the action of the cotter and the sealing part. Since the gas, which is one of the three elements, is excluded, the service course of the PD joint and the EF joint having a feature that does not lead to a disaster even if an ignition source such as a spark is generated is used as a means. (Means 13)

Also, the service of the PD joint as well as the EF joint is based on the service of the PD joint and the EF joint characterized by a structure without the need to incorporate a hole saw. (Measure 14)

In addition, service joints of PD joints and EF joints have a hollow chamfered surface welding surface of at least a C-chamfered portion or an R-chamfered portion, and a flat welding surface of an upper end portion or a cylindrical hollow inner circumferential surface There are two welding surfaces in which the welding surfaces are individually continuous, or the welding surfaces have three welding surfaces in which both the flat welding surface of the upper end or the cylindrical hollow inner circumferential surface welding surface are continuous. And a PD component and an EF component having a welding surface corresponding to the welding surface are systematically integrated with the synthetic resin by PD bonding and EF bonding, and the opening of the joint is closed by welding and fixing. The service of the PD joint and the EF joint characterized by the (Means 15)

In addition, for the service joints of PD joints and EF joints, from the plastic tube side, in the small-diameter joint sealing portion, the small-diameter joint sealing portion opening axis, the small-diameter joint inclined portion axis, and the small-diameter joint top The small diameter joint female thread portion axis is continuously arranged on the same small diameter axis, and further, in the large diameter joint seal portion, the large diameter joint sealing portion opening axis, the large diameter joint inclined portion axis and the large diameter joint The upper part fixed to the top and the large diameter joint female screw axis are continuously arranged on the same large diameter axis, and further, the hollow chamfered surface of the large diameter joint cylindrical hollow inner peripheral surface welding face axial center and the large diameter joint chamfered portion The welding surface axis and the flat welding surface axis of the upper end of the large diameter joint are continuously arranged on the same large diameter welding surface axis, and the three axes are arranged in order and coincide with the joint opening axis The service of the PD joint and the EF joint characterized by the (Means 16)

In addition, in the service coupling which is a PD joint and an EF joint used when the main branch pipe other than the supply pipe is taken out from the large-diameter main branch pipe, means for increasing the welding area with the conduit to increase the welding strength is a pair of PD terminals Alternatively, PD joints or EF joints characterized by a structure in which a plurality of blocks are arranged to increase the joint strength with the EF terminals and the PD wires or the EF wires connecting between the pair of terminals as one block I assume. (Measure 17)

In addition, in the service coupling which is a PD joint and an EF joint used when taking out the main branch other than the supply pipe from the large-diameter main branch, an auxiliary structure of means for increasing the welding area with the conduit to increase the welding strength is In order to increase the strength of the joint, as the arrangement area of the PD line and the EF line increases, the indicator has a characteristic of a structure in which a plurality of indicators and a plurality of blocks are arranged in a staggered arrangement or the like. And the service team that is the EF joint. (Mean 18)

In addition, in the service coupling which is a PD joint and an EF joint, the molten synthetic resin of the cylindrical welding surface is orthogonal to the connection axis of the connection cut by a flat cutting blade which cuts the inner surface of the female screw and the connection. The pressure on the melted and expanded synthetic resin can be kept high without being involved in the vertical direction or the horizontal direction by impinging on the intersecting surfaces and flowing out to the female screw portion and the connection portion, and the cylindrical weld portion strength can be maintained. The service team, which is a PD joint and an EF joint, has features that can ensure the (Measure 19)

Further, in PD parts and EF parts, the molten synthetic resin of the cylindrical welding face which is one of the three welding faces is a flat surface which cuts the inner surface of the female thread and the connecting part in the service fitting which is a PD joint and an EF joint. It is prevented from flowing out to the female thread and the connecting part by abutting on a plane orthogonal to or intersecting with the axial center of the connecting part cut off by the cutting blade, and it melts and expands regardless of vertical or horizontal direction The pressure of the synthetic resin can be kept high, and the joint openings are structurally integrated with the synthetic resin by the PD joint and the EF joint by PD parts and EF parts having features that can secure the columnar welded part strength by the joint A service contact, which is a PD joint and an EF joint characterized by closing the opening by welding, is used as a means. (Means 20)

In addition, the cutting tool used in the work process for cutting out three welding surfaces is a flat welding surface cutting edge for cutting a flat welding surface and a chamfered welding surface cutting edge for cutting a welding surface of a chamfered surface and a cylindrical welding surface Cutting edge of cylindrical hollow inner peripheral surface welding surface cutting surface cutting edge and female thread part, cutting edge of cutting edge which cuts away a plane crossing or orthogonal to the axis center cutting the inner surface of the connection part It is the structure of a cutting tool which deploys a set, and is a structure of a cutting tool which can cut out a plane which intersects or is orthogonal to the three hollow welding surfaces and the axis while turning the cutting tool. (Mean 21)
And
The service team, which is a PD joint and an EF joint characterized by the structure of a welding surface obtained by cutting out three welding surfaces with the cutting tool having the above structure, is used as a means. (Means 22)

In addition, since the service fitting, which is a PD joint and an EF joint, reliably prevents gas outflow by the action of the sealing portion and the top, the PD joint and the EF joint opening and the PD part and the collar part of the EF part A sheet packing or the like is disposed between them, the part is screwed in, and the opening is temporarily sealed to make it possible to use a service coupling which is a PD joint and an EF joint characterized by a structure capable of temporary embedding. (Means 23)

In addition, the PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are one wire connecting between a pair of terminals, and the pair of terminals and one wire connecting are one block. A service team, which is a PD joint and an EF joint characterized by a block or multiple block deployment structure, is used as a means. (Means 24)

In addition, the PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are characterized by the arrangement structure of the PD line characterized by a spiral and corrugated or lightning type arrangement example and a spiral or circular arrangement example. The service team, which is a PD joint and an EF joint, is used. (Means 25)

In addition, PD lines and EF lines in PD parts and EF parts are characterized by the arrangement structure of PD lines characterized by spiral and corrugated or lightning-shaped arrangement examples and spiral or circular arrangement examples. The service is a PD joint and an EF joint characterized by a structure in which the part is used to close the opening. (Means 26)

In addition, the supply pipe connection portion in the service coupling of the PD joint and the EF joint is disposed in the small diameter joint female thread, and further characterized by a structure disposed between the small diameter upper end flange portion and the small diameter joint seal portion. Means of service as well as fittings and EF fittings. (Means 27)

The entire problems No. 1 and No. 2 and No. 3 of the invention described above were solved by the means of the invention No. 1 to the invention No. 26 of the present invention, and the effects were as follows. Invention No. 1 seals a large diameter joint by service teeth of a PD joint and an EF joint characterized by scraping out and deploying three small diameter joint continuous surfaces including a hollow chamfered surface welding surface of a small diameter chamfered portion The part can be cut off and the minimum remaining amount can be obtained. Furthermore, since three welding surfaces with small diameter joints can be cut out and deployed, the opening can be reliably closed by synthetic integration with synthetic resin . (Effect 1)

Furthermore, according to the seventh invention and the twelfth invention and the thirteenth invention, the outflow prevention from the conduit can be easily and surely performed, and even if the electric current is supplied to the EF line in the vicinity, the three elements of combustion are difficult to be aligned. The occurrence was extremely reduced and it was easy to secure safe work. In addition, four bypass saddles were installed on both sides of the service team to ensure gas outflow prevention. (Effect 2)

In addition, the omission of materials can reduce construction material costs, excavated area and excavated volume, and dramatically reduce the number of welding operations and work hours for bypass construction etc. The Therefore, it was also effective in suppressing the increase in the gas charge burden on gas users. (Effect 3)

The overall problem 4 described above is the invention invention part 1 and invention part 5 and 6 and part 9 and part 10 and part 15 and part 19 and part 20 of the plane of the back of the collar of the part The portion other than the flat surface was also welded, and the opening was more reliably closed. (Effect 4)

The whole problems 5 and 6 of the invention described above are solved by means of inventions 1 to 26 of the present invention, and the effects are as follows. According to the present invention, devising at the time of the abolition of the supply pipe is possible and the whole problem 5 is solved. Furthermore, the overall content of the sixth issue was solved at the same time as the lack of the sixth issue of the overall problem was complemented. (Effect 5)

Therefore, the present invention has become the invention of a more secure service team. Furthermore, it became an invention of a service team whose remaining site is minimal at the time of retirement. In addition, the cost of construction materials was reduced, the cost of drilling such as drilling area was reduced, and the amount of work was reduced. In addition, it was able to contribute to the reduction of gas usage charges. (Effect 6)

A front view and a plan view of a service team (the supply pipe connection portion is disposed on the large diameter joint sealing portion side from the small diameter upper end portion flange portion) which continuously arranges the two sealing portions of the present invention (a) plan view (b) Front view Left side view of Figure 1 Right side view of Figure 1 A front view and a plan view of a service tie obtained by cutting a large diameter joint seal portion above cut A and cut A in FIG. 1 (c) a plan view (d) a front view Left side view of Figure 4 Right side view of Figure 4 1. A cross-sectional view of the service Q in FIG. 1 and a G-G cross-sectional view of the large-diameter component to be closed (e) A G-G cross-sectional view of the large-diameter component to be closed (f) A cross-sectional view of the service Q Fig. 7 assembled cross-sectional view of the service team and large diameter parts BB cross-sectional view of the service Q in FIG. 4 and GG cross-sectional view of the small diameter part to be closed (g) GG cross section of the small diameter part to be closed (h) B-B cross section of the service Qi Assembly cross section of the service team and small diameter parts of FIG. 9 Deployment view of one block arrangement of the saddle part PD line and the EF line and the arrangement structure of the pair of terminals and the pair of indicators (an example of a wave or lightning arrangement in which the PD line and the EF line are wavy repeat or zigzag. Of circular or round-shaped arrangement type not shown) Deployment of one block arrangement of the saddle part PD line and the EF line and the arrangement structure of a pair of terminals and a plurality of indicators (an example of a wave or lightning arrangement in which the PD line and the EF line are wavy repeat or zigzag. Alternatively, an example of the circumferential arrangement is not shown.) A development view of a plurality of block arrangements of the saddle part PD line and the EF line and an arrangement structure of a plurality of terminals and a plurality of indicators (an example of a wave or lightning arrangement in which the PD line and the EF line are wavy repeat or zigzag. Of circular or round-shaped arrangement type not shown) The front face of a service team (the supply pipe connection is disposed closer to the small diameter joint seal than the small diameter upper end flange, the supply pipe connection axis intersects or is orthogonal to the pipe axis) which continuously arranges the two seals of the present invention. Diagram and plan view (k) Plan view (m) Front view Left side view of FIG. 14 Right side view of FIG. 14 A front view and a plan view (n) a plan view (p) a front view of the service team in which a part of the large-diameter joint seal and the supply pipe connection portion above the cut-off C in FIG. Left side view of FIG. 17 Right side view of FIG. 17 CC cross-sectional view of the service Q in FIG. 14 and GG cross-sectional view of the large diameter component to be closed (q) G-G cross section of the large diameter component to be closed (s) C-C cross section of the service Q Assembly cross section of the service team and large diameter parts of FIG. 14 Fig. 17 is a cross-sectional view taken along line D-D of the service bridge, Fig. G-G cross-sectional view of the closing small-diameter part and J-J cross-sectional view of the closing connection part (t) G-G cross-sectional view of the closing small-diameter part (v) D-D cross section of service team (u) J-J cross section of connector part to be closed Assembly cross-sectional view of the service bridge of FIG. 17 with the small diameter parts to be closed and the connection parts to be closed A front view of a service team (the supply pipe connection is disposed closer to the small diameter joint seal than the small diameter upper end flange, the supply pipe connection axis coincides with the pipe axis) which continuously arranges the two seals of the present invention Top view (w) Top view (x) Front view Left side view of FIG. 24 Right side view of FIG. 24 A partial enlarged view of FIG. 20 Front view and right side view of cutting blade body Relation between the three welding surfaces of the cutting blade and joint shown in FIG. 28 and a plane orthogonal to or intersecting with the axis of the joint female thread portion Relationship between the inner diameter of the fitting female thread and the inner diameter of the hollow cylindrical inner surface welding surface (including the inner diameter of the welding surface by cutting) Relationship between male thread outer diameter and cylindrical welding surface outer diameter for small and large diameter parts Relationship between the positioning post outer diameter for the connection part and the outer diameter for the connection part cylindrical welding surface and the inner diameter of the supply pipe connection part Front and top views and bottom views of small and large diameter parts Front and top views and bottom views of connection parts Three welding faces of PD parts and EF parts

In the present invention, when the supply pipe is abolished, the service coupling of the PD joint and the EF joint joins the PD part and the EF part that close the opening of the small diameter joint sealing part to the small diameter joint sealing part which becomes the remaining part. In the form of service of a PD joint and an EF joint characterized by scraping out and deploying three consecutive welding surfaces of a small diameter joint including a hollow chamfered surface welding surface of a small diameter chamfered portion. (Form 1)

For service joints of PD joint and EF joint, two sealing parts of hollow large diameter joint sealing part and hollow small diameter joint sealing part are continuously provided, and the large diameter joint sealing is made in the direction of synthetic resin pipe. The part axis and the small diameter joint sealing part axis are continuously arranged on the joint opening axis, and further, the axis of three welding surfaces including the welding surface of the chamfered surface is opened around the opening opening. It is in the form of a service coupling of a PD joint as well as an EF joint characterized by being continuously deployed on the port side. (Form 2)

The PD joint and the supply pipe connection in the service of the EF joint are disposed in the small diameter joint female thread and further characterized by a structure disposed between the small diameter upper end flange and the large diameter joint seal. As well as in the form of service ties with EF fittings. (Form 3)

The no blow back mounting parts in the service joints of PD joints and EF joints are individually disposed on the outer peripheral surfaces of the two sealing parts of the hollow large diameter joint sealing part and the hollow small diameter joint sealing part. It is in the form of a service coupling of a PD joint and an EF joint characterized by a method of using a large diameter no blow back attachment and further using a small diameter no blow back attachment when decommissioning. (Form 4)

PD parts and EF parts that close the large diameter opening and small diameter opening in service joints of PD joints and EF joints have a cylindrical welding surface outer diameter larger than the external thread outer diameter deployed on the parts Furthermore, a flat surface intersecting or orthogonal to the male screw axis is provided between the cylindrical welding surface and the screw, and three welding surfaces corresponding to the three welding surfaces of the part PD joint and EF joint characterized in that the joint has a plane orthogonal to or intersecting with the screw axis and the inner diameter of the large diameter hollow cylindrical inner peripheral surface welding surface in the joint is larger than the diameter of the large diameter female thread valley It is in the form of a service team. (Form 5)

At the time of abolition of the supply pipe, the service coupling of the PD joint and the EF joint has three welded surfaces of which the small-diameter joint which has been cut out is continuous, and has a cylindrical shape continuous to the hollow chamfered surface of the chamfered portion at the welded surface. The inner diameter of the welding surface of the hollow inner peripheral surface is in the form of service of the PD joint and the EF joint having features larger than the diameter of the female thread of the hollow small diameter joint female thread portion. (Form 6)

Seals in the service joints of PD joints and EF joints are provided with hollow large diameter joint tops fixed with large inner diameter, large diameter joint inclined portions and large diameter joint female threads in hollow large diameter joint sealing portions Further, the service tee of the PD joint and the EF joint characterized in that the hollow small diameter joint fixing upper portion having a small inner diameter and the small diameter joint inclined portion and the small diameter joint female screw portion are disposed in the hollow small diameter joint sealing portion. (Form 7)

Although the service team of PD joints and EF joints determines whether to install a group of pressure suppression safety devices according to the environment such as ambient temperature and humidity at the time of welding (in consideration of the latitude and regional characteristics), Sometimes, the PD joint and the EF joint are characterized in that the large diameter pressure suppression safety device can be equipped with the large diameter pressure suppression safety device mounting recess, and the small diameter pressure suppression safety device can be equipped with the small diameter pressure suppression safety device mounting recess when disapproving It is in the form of a service team. (Form 8)

In the service joints of PD joints and EF joints, the large diameter joint cylindrical hollow inner peripheral surface welding surface deployed at the time of production is characterized by a structure that abuts on a plane orthogonal to or intersected with the large diameter joint female thread axis The welding surface of the small-diameter cylindrical hollow inner circumferential surface, which is machined out at the same time, has a form of service of the PD joint and the EF joint characterized in that it abuts against a cutting plane which intersects or is orthogonal to the axis of the small joint ing. (Form 9)

The service joints of the PD joint and the EF joint are continuous including the welding surfaces of the large diameter joint sealing portion axis and the small diameter joint sealing portion axis, and the chamfered surface joining the PD parts and the EF parts closing the opening. Services of a PD joint characterized by a structure in which a plurality of welding face axes are on one axis, and a structure in line with the axis of the PD part and the EF part closing the opening, and a service of the EF joint It is in the form of Qi. (Form 10)

The service coupling of the PD joint and the EF joint deploys two hollow seals of a hollow large diameter joint seal and a hollow small diameter joint seal, and the large diameter upper end of the hollow large diameter joint seal It is in the form of a service coupling of a PD joint and an EF joint characterized by a structure in which a flat portion and a small diameter upper end flat portion of a hollow small diameter joint sealing portion are provided. (Form 11)

In service joints of PD joints and EF joints, the upper fixed portion and the small diameter side portion of the small diameter joint sealing portion which is hollow when the supply pipe is abolished, and the inclined portion and the small diameter slope portion of the small diameter joint sealing portion which is hollow, By acting in contact with each other, the upper fixed portion and the large diameter side surface portion of the large diameter joint sealing portion which is hollow at the time of new construction and the inclined portion and the large diameter slope portion of the large diameter joint sealing portion which is hollow are additionally formed. These are in the form of a service coupling of a PD joint and an EF joint characterized by a structure in which the outflow of gas from the conduit is prevented by acting in contact with each other. (Form 12)

The service team of the PD joint and the EF joint is the three elements of combustion when joining the PD part and the EF part immediately after the prevention of the gas outflow from the conduit by the action of the cotter and the sealing part. Since it is one of the gas, it has the form of service of the PD joint and the EF joint which has the feature that even if an ignition source such as a spark is generated, it does not lead to a disaster. (Form 13)

The service coupling of the PD joint as well as the EF coupling is in the form of a service coupling of the PD joint as well as the EF coupling which features a structure without the need to incorporate a hole saw. (Form 14)

Service joints of PD joints and EF joints have at least a C-chamfered portion or a R-chamfered hollow chamfered surface welding surface, and the welding surface is a flat welding surface at the upper end or a cylindrical hollow inner circumferential surface welding surface And two welding surfaces that are individually continuous, and the welding surfaces have three welding surfaces that are both continuous with the flat welding surface of the upper end or the cylindrical hollow inner circumferential welding surface, A structure in which a PD component and an EF component having a welding surface corresponding to the welding surface are structurally integrated with a synthetic resin by PD bonding and EF bonding, and the opening of the joint is closed by welding. It is in the form of a service coupling of PD coupling as well as EF coupling. (Form 15)

For service joints of PD joints and EF joints, from the tube side made of synthetic resin, in the small-diameter joint seal, the small-diameter joint sealing portion opening axis, the small-diameter joint inclined portion axis, the small-diameter joint top and the small-diameter joint The female thread axis is continuously arranged on the same small diameter axis, and further, in the large diameter joint seal, the large diameter joint sealing portion opening axis and the large diameter joint inclined portion axial center are fixed The upper part and the large diameter joint female screw axis are continuously arranged on the same large diameter axis, and further, the hollow chamfered surface welding face of the large diameter joint cylindrical hollow inner peripheral surface welding face axial center and the large diameter joint chamfered portion A structure in which the planar welding surface axial center of the shaft center and the upper end of the large diameter joint is continuously disposed on the same large diameter welding surface axis, and the three axial lines are arranged in order and coincide with the joint opening axial center It is in the form of a service coupling of PD coupling as well as EF coupling. (Form 16)

In Service Team which is PD joint and EF joint used when taking out main branch other than supply pipe from main branch with large diameter, the means to increase the welding area with the conduit and increase the welding strength is a pair of PD terminal or EF With a PD wire or EF wire characterized by a structure in which the blocks are arranged in multiple blocks with the PD wire or the EF wire connecting between the terminals and the pair of terminals as one block, the form of service of the EF joint ing. (Form 17)

The auxiliary structure of the means for increasing the welding area with the conduit and increasing the welding strength in the service coupling which is a PD joint and an EF joint used when taking out the main branch other than the supply pipe from the large bore main branch is the joint In order to increase the strength of the PD, as the arrangement area of the PD line as well as the EF line increases, the indicator has a characteristic of a structure of deploying a plurality of indicators and a plurality of blocks having an arrangement structure such as a zigzag. It is in the form of a service team that is a joint. (Form 18)

In the service coupling which is a PD joint and an EF joint, the molten synthetic resin of the cylindrical welding surface is orthogonal to or intersects with the connecting part axis cut by the flat cutting blade which cuts the inner surface of the female screw part and the connecting part. By hitting the surface, it is prevented from flowing out to the female screw part and the connection part, and the pressure of the melted and expanded synthetic resin can be kept high regardless of the vertical direction or horizontal direction, and the cylindrical welded part strength is secured. It is in the form of a service coupling which is a PD joint and an EF joint having the following features. (Form 19)

In PD parts and EF parts, the molten synthetic resin of the cylindrical welding face, which is one of the three welding faces, is a flat cutting blade that cuts the inside surface of the female thread and the connection in the service that is the PD joint and the EF joint. The plastic is melted and expanded without being involved in the vertical direction or horizontal direction because it is prevented from flowing out to the female screw portion and the connecting portion by abutting on a surface orthogonal to or intersecting with the axial center of the connecting portion cut out in The pressure of the joint can be kept high, and the joint opening can be structurally integrated with the synthetic resin by the PD joint and the EF joint with PD parts and EF parts having features that can secure the columnar welded part strength, and the joint opening It takes the form of a service coupling which is a PD joint and an EF joint characterized in that the mouth is closed by welding. (Form 20)

The cutting tool used in the work process of cutting out three welding surfaces cuts a flat welding surface cutting edge that cuts a flat welding surface, a chamfered welding surface cutting edge that cuts a welding surface of a chamfered surface, and a cylindrical welding surface The cutting edge of cylindrical hollow inner peripheral surface welding surface cutting edge and female screw part, and cutting edge of cutting edge which cuts off a plane crossing or orthogonal to the axial center scraping the inner surface of the connecting part is one blade, and one set or plural sets This is a structure of a cutting tool to be deployed, which is a form of a cutting tool capable of cutting out a plane which intersects or is orthogonal to the three hollow welding surfaces and the axial center while turning the cutting tool (form 21 ), As well as
It is in the form of a service coupling which is a PD joint and an EF joint characterized by the structure of a welding surface obtained by cutting out three welding surfaces with the cutting tool of the structure. (Form 22)

Since the service fitting, which is a PD joint and an EF joint, ensures the prevention of gas outflow by the action of the sealing part and the top, the gap between the PD joint and the EF joint opening and the PD part and the collar of the EF part is ensured. A sheet packing or the like is deployed, the part is screwed in, and the opening portion is temporarily sealed to form a service coupling which is a PD joint and an EF joint characterized by a structure capable of temporary embedding. (Form 23)

The PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are one wire connecting between a pair of terminals, and the one pair of terminals and one wire connecting are one block or one block or It is in the form of a service coupling which is a PD joint and an EF joint characterized by a multi-block deployment structure. (Form 24)

PD lines and EF lines in the service coupling which is a PD joint and an EF joint are characterized by the arrangement structure of the PD line characterized by a spiral and a wave or a lightning type arrangement example and a spiral or a circle arrangement example. And is in the form of a service team that is an EF joint. (Form 25)

PD lines and EF lines in PD parts and EF parts are PD parts and EF parts characterized by the arrangement structure of PD lines characterized by spiral and corrugated or lightning-shaped arrangement examples and spiral or circular arrangement examples It is in the form of a service coupling that is a PD joint and an EF joint characterized by a structure that closes the opening. (Form 26)

In addition, the supply pipe connection portion in the service coupling of the PD joint and the EF joint is disposed in the small diameter joint female thread, and further characterized by a structure disposed between the small diameter upper end flange portion and the small diameter joint seal portion. It is in the form of service team of fittings as well as EF fittings. (Form 27)

An embodiment of the invention is illustrated. Fig. 1 shows (b) a front view and (a) of a service team (the supply pipe connection portion is disposed closer to the large diameter joint seal side than the small diameter upper end flange portion) in which two seal portions of the present invention are continuously provided. A plan view is illustrated. 2 illustrates the left side view of FIG. 1 and FIG. 3 illustrates the right side view of FIG. Also, the service connections of the 8 PD joints and the EF joints are oriented in the same direction as the 20 synthetic resin pipe axis.

Further, FIG. 4 shows (d) a front view and (c) a plan view of the service team in which the large diameter joint seal portion above the cut A and cut A in FIG. 1 is cut off. FIG. 5 illustrates the left side view of FIG. FIG. 6 illustrates the right side view of FIG. FIG. 7 illustrates a cross-sectional view of FIG. 1 (f) service line AA and (e) a cross-sectional view of FIG. 33 taken along the line G-G of the large diameter component to be closed. FIG. 8 illustrates an assembled cross-sectional view of the servicing and large diameter components of FIG. FIG. 9 illustrates a (h) BB cross section of the service team in FIG. 4 and (g) a G-G cross section diagram in FIG. 33 of the small diameter part to be closed. FIG. 10 illustrates an assembled cross-sectional view of the servicing and small diameter components of FIG.

As described above, from FIG. 1 to FIG. 10, a series of explanations about service arrangements in which the two sealing portions of FIG. 1 are continuously arranged (the supply pipe connection portion is arranged closer to the large diameter joint sealing portion than the small diameter upper end collar portion) FIG.

Here, the EF parts, the EF joints and the EF wires for the EF bonding are omitted as they are well known as conventional techniques. Next, PD junction is picked up and explained as various inventions and various named coined inventors taken up in Patent Document 3 of the prior art document and the prior art of the document.

The PD line is an optical fiber made of quartz glass or glass such as BK7, and a pair of PD terminals are connected by one PD line. Returning the laser beam incident from one terminal of the service charge main body PD terminal of 3 or the light beam in the infrared region to the light source from the other terminal is in the middle of the PD line provided with the light beams incident from the left and right terminals. At this point, it can be inferred that welding failure will occur at the front side without reaching the front side from the position concerned, and in order to solve this problem, it is always returned. As a result, it is assumed that the light beam incident from the right, the light beam incident from the left, and the combined light quantity become uniform everywhere.

Here, while the light beam passes through the PD beam, the surrounding synthetic resin is melted by the leaked light beam from the PD wire to the outside of the wire, and the PD bonding is performed to integrate the welding surface systematically with the synthetic resin . Here, it should be noted that when the light beam is a laser beam, the energy of the light beam is so strong that the synthetic resin will react in a hypersensitive manner and melt as it is only by irradiating a small amount of light beam to the synthetic resin. It is the point that Therefore, the result of taking measures to leak slightly out of the line when passing through is the origin of PD junction and PD line.

Also, the initial two letters of PD junction and PD wire and PD joint and PD part and PD terminal are two letters from "trademark PDOCJ". If there is no problem within the scope of the trademark, it will be appreciated if you think that it is just a string outside the scope. Anyway, I needed a string that I could use freely.

Below, the code | symbol used is demonstrated. Description of the EF wire and the EF junction will be omitted because they are well known in the prior art. In the figure, reference numeral 1 denotes a service body of a PD joint and an EF joint, which is made of a synthetic resin such as polyethylene. 2 is a service Q body PD wire and EF wire of a PD joint and an EF joint, and is a service Q body PD terminal and an EF terminal of the 3 PD joint and an EF joint, and the light beam transmitted from the light source to the PD wire It is a part which transmits to 2 PD lines and is made to enter. In addition, the remaining light beam transmitted from the other of the pair of terminals is also transmitted and returned to the light source at the same time.

Next, 4 is a service main body indicator of the PD joint and the EF joint, and it can be visually confirmed whether PD joint or EF joint is made. Reference numeral 5 denotes a service fitting main body fixing clamp fixing portion of the PD joint and the EF joint, which is a portion to which a fixing clamp is attached when the service body main body 1 is fixed to 20 synthetic resin pipes by the fixing clamp. Reference numeral 8 denotes a service connection pipe connection portion of the PD joint and the EF joint, which is a portion where the supply pipe is connected to the service contact by an elbow or a socket. In this figure, it faces in the same direction as the 20 tube axes, but there is no problem even if it is deployed in the cross or orthogonal direction, and the layout changes as appropriate so as not to hide the 3 terminals and 4 indicators There is no hindrance to

Next, 10 is an opening (hole saw attachment hole) of the PD joint and the EF joint, and is an opening for attaching a hole saw as a tool which is bored in 20 synthetic resin pipes and communicated with the opening. The hole sawing hole of the synthetic resin tube 22 is a hole in which the service plate and the synthetic resin tube are communicated with each other by the hole saw of the tool attached to the opening. The gas flow from the holes 22 into the service cavity can be reliably prevented from flowing out from the holes 22 drilled by the action of the large diameter and small diameter joint sealing portions and pieces described later. Therefore, as in Patent Document 1 of the prior art, it is not necessary to use a hole saw for preventing gas leakage. Therefore, the service team of the present invention has a structure that does not require a built-in hole saw.

Therefore,
Since the perforation of the communication hole with the conduit and the substantial gas leakage prevention by the hole saw of Patent Document 1 are not performed, the service of the PD joint of the present invention and the EF joint is characterized by the structure without the need to incorporate the hole saw. It is a service team of PD joints as well as EF joints. (Invention No. 14)

Next, in the openings (hole saw attachment holes) of 10 PD joints and EF joints, 11 PD joints and the upper end of openings (hole saw attachment hole upper end face) of EF joints or 12 hollow large diameter joints Since the large diameter upper end flat portion of the sealing portion is provided, the opening portion is made of synthetic resin by PD bonding or EF bonding with a flat welding surface of the back surface of the flange portion of the PD component and EF component described later. Can be integrated to ensure a permanent and reliable seal. In addition, the periphery of the relevant opening is disposed in the 13 PD joints and the large diameter upper end collar of the EF joint.

Next, 14 is a small diameter upper end collar portion of the PD joint and the EF joint, and the upper end is a flat welding surface (by cutting work) of a small diameter upper end portion 400 described later. The small diameter upper end flanges of the 14 PD joints and the EF joints are projected from the outer peripheral surface of the main body, but when the supply pipe is abolished by cutting A and cutting A, part of the small diameter joint female thread 302 and 8 PD joints And since the service charge supply pipe connection of the EF joint and the large diameter joint seal of 100 are cut and discarded, the purpose is to press and position a cutting tool such as a scraper and perform the cutting operation, 14 PD joints Also, it has two purposes aimed to become part of the small diameter upper end welding surface of the EF joint. In addition, before the cutting operation, the small diameter sealing portion 240 is attached first and the gas outflow prevention is surely performed, so that the safety operation can be performed.

Next, 17 is a large diameter no-blowback attachment portion of the PD joint and the EF joint, and is disposed on the outer peripheral surface of the 100 large diameter joint seal portion, and 40 large diameter encapsulation during hole saw attachment and drilling work and It is a part to which no blow back is attached to prevent excessive gas outflow to the outside at the time of work to attach the part and reliably prevent gas outflow. Also, 18 is a small diameter no-blow-back attachment portion of the PD joint and the EF joint, and is disposed on the outer peripheral surface of the small diameter joint seal portion 300 and is left behind when the supply pipe is abolished. This is a site where a no blow back is attached so as not to cause an excessive gas outflow to the outside at the time of an operation to securely prevent the gas outflow by attaching the small diameter sealing portion 240.

Next, in FIG. 1 (b), with respect to the welding surface around the opening and the like, 178 are three welding surfaces continuous with large diameter joints, and the service main body of 1 PD joint and EF joint at the time of product manufacture Of the flat welding surface of the upper end of the large diameter joint 172 and the hollow chamfered surface welding surface of the large diameter joint chamfered portion 173 and the hollow inner peripheral surface welding surface of the large diameter joint 174 of the large diameter joint It consists of three aspects. Furthermore, the large diameter joint cylindrical hollow inner peripheral surface welding surface 174 strikes and is continuously connected to a plane orthogonal to or intersected with the large diameter joint female screw axis of 171 integrally molded at the same time.

Next, FIG. 2 is a left side view of FIG. 1, and the above description is almost sufficient. However, since a hidden line is hard to see in FIG. 1, the figure shows the positional relationship between the sealed portions by adding the large-diameter joint inclined portion of typical 103b and the small-diameter joint inclined portion 303b of each sealed portion. In addition, clarify the relationship between the 8 PD joints as well as the service connections of the EF joints. FIG. 3 is a right side view of FIG. 1 and is similar to FIG.

Next, FIG. 4 shows each remaining part below cut A and cut A in FIG. In (c), only cutting line B-B is filled in, and in (d), a part of the small diameter joint internal thread portion 302 which has become a remaining portion (a front view and a right side view of the cutting blade main body in FIG. And the relationship between the three welding surfaces of the cutting blade and the joint in Fig. 29 and the plane orthogonal to or intersecting with the joint female screw shaft axis.) The small diameter joint of 403 is made continuous by cutting work at the supply pipe abolition work site The three welding surfaces (due to cutting work) and a plane (due to cutting work) advanced by cutting that intersects or is orthogonal to the small diameter joint threaded portion axis of 405 are cut out.

Three welded small diameter joints of 403 small diameter joints (by cutting operation) are flat welding surfaces of small diameter upper end of 400 (by cutting operation) and hollow beveled surface welding surfaces of small diameter joint of 401 with small diameter joints ( It consists of a cutting operation) and a welding surface (by cutting operation) of a small diameter cylindrical hollow inner peripheral surface 402. Furthermore, the welding surface of the small-diameter cylindrical hollow inner peripheral surface 402 (due to cutting work) strikes against a cutting plane (due to cutting work) that intersects or is orthogonal to the small-diameter joint female thread portion axis of 405 and continues to 405 It is connected.

Next, FIGS. 5 and 6 are a left side view and a right side view, respectively, showing the service joints of the PD joint of 3 and the EF joint and the PD terminals of the EF joint and the PD terminals of the EF terminal and 4 and the EF joint of the EF joint. Each pair is deployed in the body of one service team.

Next, FIG. 7 which is a selection diagram will be described. In FIG. 7, (f) in FIG. 1 is a cross-sectional view taken along line A-A of the service team, and (e) is a diagram showing 10 PD joints and G-G of large diameter parts that close the openings (hole saw attachment holes) of EF joints. It shows a cross-sectional view. Both the AA cross section and the GG cross section are cross sections by the same plane.

Here, the large diameter sealed parts of 40 for closing the openings (hole saw attachment holes) of the 10 PD joints and the EF joints of (e) are the lids of the individual 50 large diameter PD parts and the respective EF parts and 60 56 large diameter PD parts and a large diameter pressure reduction of 62 large diameter PD parts and EF parts equipped with a large diameter pressure reduction safety device of 99 consisting of a large diameter screw portion of 70 and a large diameter top of 70 A safety device mounting recess is provided.

Therefore,
Although the service team of PD joints and EF joints determines whether to install a group of pressure suppression safety devices according to the environment such as ambient temperature and humidity at the time of welding (in consideration of the latitude and regional characteristics), Sometimes the large diameter pressure suppression safety device can be equipped with the large diameter pressure suppression safety device mounting recess, and as shown in Fig. 10, the small diameter pressure suppression safety device with 299 can be equipped with the small diameter pressure suppression safety device mounting recess. It is a service team of a PD joint and an EF joint configured in the following manner. (Invention 8)

Furthermore, 50 is constituted by 51 large diameter PD parts and the collar part of EF parts and 52 large diameter PD parts and screw parts of EF parts, and 60 is 61 large diameter upper end parts and 62 large diameter pressure control A safety device mounting recess, a large diameter middle portion 63 of the male screw, and a large diameter portion 64 of the lower portion. Reference numeral 70 denotes an upper end of a large diameter piece 71 of which 64 is fitted, a large diameter inclined surface portion 72, and a large diameter piece side surface portion 73.

Here, the prevention of gas outflow by the action of the 70 pieces and the large diameter joint sealing portion 100 is the 60 large diameter screw portions in which the large diameter lower portion 64 and the large diameter piece upper end portion 71 are fitted and integrated. 10 PD joints and EF which communicate with the pipe by hole saw perforation hole of the synthetic resin pipe by the large diameter joint piece fixed upper part of 103a and the large diameter piece side part of 73 contacting by screwing down Gas filled in the opening (hole saw attachment hole) of the joint is prevented from flowing out of the service carrier. Furthermore, the outflow of gas is prevented by the contact between the large diameter joint slope portion 103b and the large diameter slope portion 72. As described above, the two-stage gas outflow preventing action can surely prevent the gas outflow from the opening 10 to the outside of the service charge.

Therefore,
In service joints of PD joints and EF joints, the upper fixed portion and the small diameter side portion of the small diameter joint sealing portion which is hollow when the supply pipe is abolished, and the inclined portion and the small diameter slope portion of the small diameter joint sealing portion which is hollow, By acting in contact with each other, the upper fixed portion and the large diameter side surface portion of the large diameter joint sealing portion which is hollow at the time of new construction and the inclined portion and the large diameter slope portion of the large diameter joint sealing portion which is hollow are additionally formed. A service contact of a PD joint and an EF joint having a form characterized by a structure in which the outflow of gas from the conduit is prevented by acting in contact with each other. (Invention No. 12)

Therefore,
The service team of the PD joint and the EF joint is the three elements of combustion when joining the PD part and the EF part immediately after the prevention of the gas outflow from the conduit by the action of the cotter and the sealing part. One of the problems is that it is a service team of a PD joint and an EF joint that has features that will not lead to a disaster even if an ignition source such as a spark is generated because it excludes gas. (Invention 13)

Also, the front view, top view and bottom view of the small and large diameter parts of FIG. In addition, 80 has further components, and the 53 large diameter PD parts and lids EF and PD lines of the EF parts are on the welding surface on the back side of the 51 large diameter PD parts and the EF parts collar It is provided by being embedded on three planes of parallel plane and curved surface and outer peripheral surface. Although one large diameter PD part 54 and one large diameter PD part 55 of the large diameter PD parts and EF parts and a lid indicator of the EF parts are disposed, there is no problem even if one or more large parts are used. In addition, a tool-use convex portion of 57 large diameter PD parts and EF parts having a hexagonal column or other shape for applying a tool in the case of screwing 80 is also a component.

Also, in Fig. 7 (e), please refer to the enlarged view of the three welding surfaces of PD parts and EF parts in Fig. 35 for three welding surfaces of 153 large diameter parts connected in series. The reference numeral 153 is composed of a flat welding surface on the back surface of the large-diameter component collar portion 150, a chamfered surface welding surface on the large-diameter component chamfered portion 151, and a welding surface of the large-diameter component cylindrical outer peripheral surface 152. Please refer to Patent Document 3 of the prior art for detailed description of these 153 large diameter parts continuous three welding surfaces.
Further, a plane orthogonal to or intersecting with the large diameter component screw shaft of 155 is continuously connected to the welding surface of the large diameter component cylindrical outer peripheral surface 152.

Also, in (f) of Fig. 7, please refer to the enlarged view of Fig. 27 for the three consecutive welded surfaces of 178 large diameter joints. Numeral 172 denotes a flat welding surface of the upper end of the large diameter joint, a hollow chamfered surface welding surface of the large diameter joint chamfered portion 173 and a hollow inner peripheral surface welding surface of the large diameter joint 174 of the large diameter joint. The three consecutive welded surfaces of the 178 large diameter joints are described in detail in Patent Document 3 of the prior art, so please refer to them. Further, a plane perpendicular to or intersecting with the large diameter joint internal thread portion axis 171 of the large diameter joint 171 is continuously connected to the hollow inner circumferential surface welding surface of the large diameter joint 174 of the large diameter joint.

Here, the correspondence of the welding surface is described. In (e) and (f) of FIG. 7, 150 and 172, 151 and 173, and 152 and 174 are welding surfaces to be welded, respectively. Furthermore, since 155 and 171 are in contact, even if the welding surface of the large-diameter component cylindrical outer peripheral surface of 152 and the hollow inner peripheral surface welding surface of the large-diameter joint cylindrical shape of 174 are vertically oriented, they melt and soften at the time of bonding The synthetic resin acts to prevent the flow to the large diameter joint female thread of 102. This function can cover the point where it is difficult to fix with a fixed clamp.

Therefore,
Service joints of PD joints and EF joints have hollow chamfered surface welding surfaces of at least 173 C chamfers or R chamfers, and the welding surfaces have a flat welding surface of the upper end of 172 or a cylindrical shape of 174 The two welding surfaces are a continuous welding surface of the hollow inner peripheral surface welding surface individually, or both the flat welding surface of the upper end portion of 172 or the cylindrical hollow inner peripheral surface welding surface of 174 is The PD part and the EF part having the three welding surfaces which are continuous with each other and having the welding surface corresponding to the welding surface are structurally integrated with the synthetic resin by the PD bonding and the EF bonding, and the opening port 10 of the joint And a service joint of a PD joint and an EF joint which are characterized in that they are closed by welding and fixing. (Invention 15)

In 150 and 172, the area around the outer periphery of the collar 51 is a cold part that does not melt, and the synthetic resin in the welded part may expand and lift the lid, but it can be easily fixed with a fixing clamp So you can prevent the cold part from opening your mouth. Therefore, it can be inferred that the outflow of the molten synthetic resin is prevented even if the plane is directed in the vertical direction, and the increase in pressure of the molten portion can be ensured.

Therefore, it can be inferred that an increase in pressure in the melting portion can be secured. That is, by joining, the synthetic resin is integrated systematically and the condition is very good, and the opening is continuously blocked for 200 years or 300 years. In addition, the period is almost the same as the useful life of the material polyethylene. This is the performance capability of PD parts as well as EF parts and the habit of PD bonding and EF bonding.

Next, referring to FIG. 7F, the service of the present invention is characterized in that the large diameter joint sealing portion of 100 and the small diameter joint sealing portion of 300 have two sealing portions having different diameters. is there. The large diameter joint seal portion 100 is constituted by the large diameter joint seal portion opening 101, the large diameter joint female thread portion 102, and the large diameter joint piece fixing portion 103. Further, 103 is constituted by a large diameter joint top fixed portion 103a and a large diameter joint inclined portion 103b, and a central portion of the large diameter joint 103c is hollow. Further, the small diameter joint seal portion 300 is constituted by the small diameter joint seal portion opening portion 301, the small diameter joint female thread portion 302, and the small diameter joint piece fixing portion 303. Furthermore, 303 is comprised by 303a of small diameter joint upper part fixing part, and the small diameter joint inclination part of 303b, and the small diameter joint center part of 303c is hollow.

Therefore,
For service joints of PD joints and EF joints, from the plastic tube side, in the small diameter joint seal portion 300, the small diameter joint seal portion opening axis 301 and the 303b small diameter joint inclined portion axis and the small diameter 303a The upper joint joint fixing upper portion and the small diameter joint female thread portion axis of the 302 are continuously arranged on the same small diameter axis, and further, at the large diameter joint sealing portion of 100, the large diameter joint sealing portion opening axial center of 101 and 103b large diameter joint inclined portion axis and 103a large diameter joint top fixed and 102 large diameter joint female thread axial center are continuously arranged on the same large diameter axis, and further, 174 large diameter joint cylindrical hollow Inner peripheral surface welding center and hollow chamfered surface welding center of large diameter joint chamfered portion of 173 and planar welding surface central axis of upper end of large diameter joint and 172 continuous on the same large diameter welding surface axis Arranged, 3 axes are arranged in order, 10 joints A service Qi PD joints and EF joint in the form, wherein the structure which coincides with the mouth portion axis. (Invention No. 16)

In addition, in the service joints of PD joints and EF joints, the relationship between the axial centers of each part is: 100 large diameter joint sealing portion axial centers and 300 small diameter joint sealing portion axial centers, PD parts for closing the opening and EF A PD component characterized by a structure in which a plurality of continuous welding surface axial centers of welding surfaces such as 173 including a welding surface of a chamfered surface joining parts are on one axial center, and further closing the opening of (e) And the service team of the PD joint of the form characterized by the structure which is in line with the axis of the EF part and the EF joint.

Therefore,
The service joints of the PD joint and the EF joint are continuous including the welding surfaces of the large diameter joint sealing portion axis and the small diameter joint sealing portion axis, and the chamfered surface joining the PD parts and the EF parts closing the opening. A PD joint characterized by a structure in which a plurality of welding face axes are on one axis, and further characterized by a structure in line with the axis of the PD part and the EF part closing the opening It is service Qi of the fitting. (Invention 10)

Therefore,
Even if the supply pipe connection portion 8 is disposed on the small diameter joint sealing portion side 300 from the small diameter upper end collar portion 14 and the supply pipe connection portion is arranged on the large diameter joint sealing portion side from the small diameter upper end collar portion Even if the pipe connection portion 8 is disposed on the large diameter joint sealing portion side 100 from the small diameter upper end collar portion 14 and the supply pipe connection portion 8 is in the same direction or at a right angle with the 20 pipes,
For service joints of PD joint and EF joint, two sealing parts of hollow large diameter joint sealing part 100 and hollow small diameter joint sealing part 300 are continuously disposed, and the large diameter joint is directed in the direction of the synthetic resin pipe. Sealed part shaft center (shaft center of hollow large diameter joint seal part of 100) and small diameter joint seal part shaft center (shaft center of hollow large diameter joint seal part of 300) of the joint opening The axis of three welding surfaces 178 including the welding surface of the chamfered surface is continuously arranged on (hole joints of 10 PD joints and hole saw attachment holes which become openings of EF joints) and further around the opening mouth. , A service coupling of a PD joint and an EF joint in the form of being continuously deployed on the opening side of the opening. (Invention 2)

Furthermore, therefore,
Seals in the service joints of PD joints and EF joints are provided with hollow large diameter joint tops fixed with large inner diameter, large diameter joint inclined portions and large diameter joint female threads in hollow large diameter joint sealing portions Furthermore, in the case of a PD joint and an EF joint having a configuration characterized in that a hollow small-diameter joint fixing upper portion with a small inner diameter and a small-diameter joint inclined portion and a small-diameter joint female thread are provided in the hollow small-diameter joint sealing portion. It is. (Invention 7)

In addition, the service supply pipe connections of the 8 PD joints and the EF joints are arranged in the small diameter joint female threads of the 302, and the 14 PD joints and the small diameter upper end flanges of the EF joint and the 100 large diameter joint seal And a service coupling of a PD joint as well as an EF joint characterized by the structure disposed between them.

Therefore,
The 8 supply pipe connections in the service coupling of the PD joint as well as the EF joint are arranged in the small diameter joint female thread 302 and further between the small diameter upper end collar 14 and the large diameter joint seal 100 Of a PD joint and an EF joint having a form characterized by the following structure. (Invention 3)

Furthermore, 18 PD joints and a small diameter no-blowback attachment portion of the EF joint are disposed on the outer peripheral surface of the small diameter joint seal portion 300, and 17 PD joints and the outer peripheral surface of the 100 large diameter joint seal portion The large diameter no-blow-back mounting portions of the EF joint are individually arranged. Further, both sealing portions are hollow since they include female threads.

Therefore,
The no blow back attachment parts in the service joints of the PD joint and the EF joint are individually disposed on the outer circumferential surfaces of the two seals of the hollow large diameter joint seal 100 and the hollow small diameter joint seal 300, A PD joint and an EF characterized in a method of using the large diameter no blow back attachment portion 17 at the time of new construction and further using the small diameter no blow back attachment portion 18 at the time of abolition shown in FIG. It is service Qi of the fitting. (Invention 4)

Next, FIG. 8 illustrates an assembled cross-sectional view of the servicing of FIG. 7 and the large diameter component. 9 is a B-B cross-sectional view of the service person in FIG. 4 and a G-G cross-sectional view of the small diameter part to be closed. (G) is a G-G cross-sectional view of the small diameter part to be closed, and (h) is a B-B cross-sectional view of the service team. Further, FIG. 10 is an assembled cross-sectional view of the service holder and the small diameter part of FIG. Further, FIG. 8 is a cross-sectional view assembled by screwing (e) of FIG. 7 into (f). In this state, gas is supplied to the supply pipe and buried in the ground. If the supply pipe is to be abolished, cut along the cutting line of cutting A and cutting A and discard the large diameter sealing portion side. The remaining portions are a part of the small diameter joint female thread 302, the PD joint 14 and the small diameter upper end flange of the EF joint and the small diameter joint seal 300, as shown in FIG. 9 (h). At the time of cutting, it is possible to cut a sharper or the like along the small diameter upper end flats of the 14 PD joints and the 15 hollow small diameter joint sealing parts which are the upper surfaces of the small diameter upper end flanges of the EF joints.

Further, in FIG. 4, the remaining portions are the PD joint of 1 and a part of the service body of the EF joint and the PD joint of 2 and the service branch body of the EF joint and the PD wire of the EF joint and the PD joint of EF wire and 3 and the EF Fitting Service Qi body PD terminal and EF terminal and 4 PD joints and EF joint service Qi body indicator and 5 PD joints and EF joint service Qi body fixed clamp fixing part and 14 PD joints and small diameter upper end of EF joint It becomes the small diameter no blow back attaching part of the part flange and 18 PD joints as well as the EF joint. However, it is possible to cut off the portion on which the 5 PD joint and the service main body fixed clamp fixing part of the EF joint travel.

Next, in (h) of FIG. 9 which is a cross-sectional view of the remaining portion after cutting and discarding, the three small diameter jointed continuous 403 welding surfaces are made by cutting the small diameter joint female thread portion of the remaining 302 . Three small diameter joints of 403 continuous welding surfaces are the flat welding surface of the small diameter upper end of 400 (by cutting work) and the hollow chamfered surface welding surface of the small diameter joint chamfer of 401 (by cutting work) and the small diameter cylinder of 402 The welding surface of the small diameter cylindrical hollow inner peripheral surface of the small diameter cylindrical inner peripheral surface of the small diameter joint (by cutting operation) It abuts on a plane of cut or advanced plane (due to cutting operation) which intersects or intersects perpendicularly, and it is a continuous connection.

Here, the cutting blade for cutting the surfaces 403 and 405 is configured as illustrated in the front view and the right side view of the cutting blade main body in FIG. Reference numeral 700 denotes a cutting blade main body, which is intended to support each cutting edge and is a portion attached to a cutting tool (not shown). A single-edged blade with a continuous cutting edge of 701 flat welding surface cutting edge, 710 chamfered portion welding surface cutting cutting edge, 720 cylindrical hollow inner peripheral surface welding surface cutting cutting edge, and cutting edge advancing a plane intersecting or orthogonal to axis of 730 Are configured. By pressing and screwing a tool attached with a continuous single-edged blade, the remaining small diameter joint 302 made of synthetic resin is scraped to form a welding surface or the like.

Next, FIG. 29 is a relationship diagram between the three welding surfaces of the cutting blade and the joint of FIG. 28 and a plane orthogonal to or intersecting the joint internal thread axis. The flat welding surface cutting edge 701 is a cutting edge that cuts out the flat welding surface (according to the cutting operation) of the small diameter upper end portion 400. In addition, the cutting edge of the chamfered portion welding surface 710 is a cutting edge from which the hollow chamfered surface welding surface (due to the cutting operation) of the small diameter joint chamfered portion 401 is cut. The cylindrical hollow inner peripheral surface welding surface cutting edge 720 has a cutting edge for cutting out the welding surface (due to the cutting operation) of the small diameter cylindrical hollow inner peripheral surface 402. A cutting edge that cuts a plane that intersects or is orthogonal to the axis of the shaft 730 is a cutting edge that cuts off the remaining small diameter joint thread of the 302, and a cutting plane that crosses or intersects the axis of the small diameter joint thread portion of 405 (cutting work ) Is also a cutting edge to cut out.

Therefore, at the time of abolition of the supply pipe using this cutting blade, the service coupling of the PD joint and the EF joint occludes 8 of the opening port of the small diameter joint sealing portion in the small diameter joint sealing portion which becomes the remaining portion. Of the 600 small diameter joints including the hollow chamfered surface welding surface of the small diameter chamfered part joining the PD parts and the EF parts, and cutting out and deploying three welding faces continuous, and the opening of the small diameter joint sealing part A configuration characterized by scraping and deploying three small diameter joints of 403 small diameter joints including a hollow chamfered surface welding surface of small diameter chamfered parts for bonding 280 PD parts and EF parts closing the port opening 10 It is a service team of PD joints as well as EF joints. (Invention 1)

Therefore, the cutting tool used in the work step of cutting out the three welding surfaces further includes a flat welding surface cutting edge for cutting the flat welding surface 701 and a chamfered welding surface cutting edge for cutting the welding surface of the chamfered surface 710 and The cutting edge of the cylindrical hollow inner circumferential surface welding surface for cutting the cylindrical welding surface of 720 and the cutting edge of the female screw portion 730 and the cutting edge for cutting a plane intersecting or orthogonal to the axial center cutting the inner surface of the connection portion This is a structure of a cutting tool which has one blade and one set or plural sets, and while rotating the cutting tool, cuts out a plane intersecting or orthogonal to the three hollow welding surfaces of the pressing 403 and the axial center of 405 Structure of cutting tools (invention 21), and
It is service Qi which is a PD joint and an EF joint having a form characterized by the structure of the welding surface of the welding surface 403 which is the welding surface 403 in which three welding surfaces are cut out by the cutting tool having the structure. (Invention No. 22)

Next, (g) in FIG. 9 illustrates a cross-sectional view of the small diameter component that closes the opening (hole saw attachment hole) of the 10 PD joints and the EF joint. Both (g) and (h) are cross sections by the same plane. Here, the small diameter sealing part of 240 which closes the opening (hole saw attachment hole) of 10 PD joints of (h) and the EF joint is the small diameter of the small diameter PD parts of 250 individual parts and the small diameter of 260 Disposed of the small diameter PD part of the small diameter pressure suppression safety device of 299 consisting of the screw part and the small diameter piece of 270, the lid part safety device mounting part of the EF part and the small diameter pressure suppression safety device mounting recess of 262 parts ing.

Therefore,
Although the service team of PD joints and EF joints determines whether to install a group of pressure suppression safety devices according to the environment such as ambient temperature and humidity at the time of welding (in consideration of the latitude and regional characteristics), Sometimes, the PD joint and the EF joint are characterized in that the large diameter pressure suppression safety device can be equipped with the large diameter pressure suppression safety device mounting recess, and the small diameter pressure suppression safety device can be equipped with the small diameter pressure suppression safety device mounting recess when disapproving I am a service person. (Invention 8)

Furthermore, 250 is composed of 251 small diameter PD parts and the flange of EF parts and 252 small diameter PD parts and the screw parts of EF parts, and 260 has 261 small diameter upper end parts and 262 small diameter pressure control safety device mounting recesses And a small diameter intermediate portion of 263 and a small diameter lower portion of 264. Reference numeral 270 denotes an upper end of a small diameter piece 271 in which H.264 is fitted, a small diameter sloped portion 272 of a small diameter piece, and a small diameter side piece of the small diameter piece 273.

Here, the prevention of gas outflow by the action of the 270 pieces and the 300 small-diameter joint sealing portion is achieved by screwing the 260 small-diameter screw portion integrated with the 264 small-diameter lower portion and the 271 small-diameter upper end. Push down and open the 10 PD joints and EF joints that are in fluid communication with the pipe by hole sawing of 22 synthetic resin pipes by contacting the small diameter joint piece fixing upper portion of 303a and the small diameter piece side part of 273 in contact The gas filled in the hole is prevented from flowing out of the service team. Furthermore, the outflow of gas is prevented by the contact between the small diameter joint slope portion 303 b and the small diameter slope portion 272. As described above, the two-stage gas outflow preventing action can surely prevent the gas outflow from the opening 10 to the outside of the service charge. In addition, since the no blow back can be attached to the small diameter no blow back attaching portion of the 18 PD joints and the EF joint at the time of the work, the safe work can be performed.

Therefore,
In service joints of PD joints and EF joints, the upper fixed portion and the small diameter side portion of the small diameter joint sealing portion which is hollow when the supply pipe is abolished, and the inclined portion and the small diameter slope portion of the small diameter joint sealing portion which is hollow, By acting in contact with each other, the upper fixed portion and the large diameter side surface portion of the large diameter joint sealing portion which is hollow at the time of new construction and the inclined portion and the large diameter slope portion of the large diameter joint sealing portion which is hollow are additionally formed. A service contact of a PD joint and an EF joint having a form characterized by a structure in which the outflow of gas from the conduit is prevented by acting in contact with each other. (Invention No. 12)

Therefore,
The service team of the PD joint and the EF joint is the three elements of combustion when joining the PD part and the EF part immediately after the prevention of the gas outflow from the conduit by the action of the cotter and the sealing part. The service team of the PD joint and the EF joint which has a feature that does not lead to a disaster even if an ignition source such as a spark is generated because it excludes one of the gases. (Invention 13)

Also, the front, top, and bottom views of the small and large diameter components of FIG. In addition, 280 has further components, and the small diameter PD component of 253 and the lid EF line and PD line of the EF component are parallel to the welding surface on the back surface side of the small diameter PD component of 251 and the EF component It is provided by being embedded on three surfaces of a flat surface and a curved surface and an outer peripheral surface. In addition, although one small diameter PD component and one small diameter PD component of the small diameter PD component and a small diameter PD component of the small diameter component of the EF component are disposed, there is no problem even if one or a plurality of them. In addition, a small diameter PD component of 257 having a hexagonal column or other shape for applying a tool in the case of screwing 280 and a convex portion for a tool of the EF component are also components.

Also, in Fig. 9 (g), please refer to the enlarged view of the three welding faces of the PD parts and the EF parts in Fig. 35 for three welding faces of 353 small diameter parts continuous. Reference numeral 353 is formed of a flat welding surface of the back surface of the small diameter part 350 of 350, a chamfered surface welding surface of the small diameter part chamfered part of 351, and a welding surface of the outer peripheral surface of the small diameter parts 352 of small diameter. Please refer to the patent document 3 of the prior art for the detailed description of the three welding surfaces where the 353 small diameter parts are continuous. Further, a plane orthogonal to or intersected with the small-diameter component screw shaft of 355 is continuously connected to the welding surface of the small-diameter component cylindrical outer peripheral surface of 352.

Here, the correspondence of the welding surface is described. In 353 of (g) of FIG. 9 and 403 of (h), 350 and 400, 351 and 401, and 352 and 402 are welding surfaces to be welded, respectively. Further, since 355 and 405 are in contact with each other, 402 is in contact with 405, and the welding surface of the small diameter component cylindrical outer peripheral surface of 352 and the small diameter joint cylindrical hollow inner peripheral surface welding surface of 402 are directed vertically. It functions to prevent the synthetic resin, which is melted and softened at the time of joining, from flowing out to the small diameter joint female thread portion 302. This function can cover the point where it is difficult to fix with a fixed clamp.

Therefore,
In the service joints of PD joints and EF joints, the large diameter joint cylindrical hollow inner peripheral surface welding surface deployed at the time of production is characterized by a structure that abuts on a plane 355 orthogonal or intersecting the large diameter joint female thread axis Further, the welded surface of the small diameter cylindrical hollow inner circumferential surface cut off at the time of retirement is a PD joint and an EF joint in a configuration characterized in that it abuts on a cut surface 405 which intersects or is orthogonal to the axis of the small diameter joint female thread It is a service team of (Invention 9)

Accordingly, in the service coupling which is a PD joint and an EF joint, the molten synthetic resin of the cylindrical welding surface has a female thread portion axis cut out with a flat cutting blade which cuts the female thread portion and the inner surface of the connecting portion and the connection. By hitting into 405 and 605 of the plane orthogonal to or intersecting with the axial center, it is prevented from flowing out to the connecting portion of the female thread portion and 8 of 302, and the melted and expanded composite without involving in the vertical direction or horizontal direction The service pressure is a PD joint and an EF joint having a form capable of holding high resin pressure and securing cylindrical weld strength. (Invention No. 19)

Therefore, in PD parts and EF parts, the fused synthetic resin 352, 552 or 152 which is one of the three welding surfaces, which is one of three welding surfaces, is a female screw portion in service Q which is PD joint and EF joint. And the connection of the internal threads 302 and 102 and the connection of 8 by hitting the surface 405 or 605 orthogonal to or intersecting with the axial center of the connection cut by a flat cutting blade that advances the inner surface of the connection. The pressure of synthetic resin that has melted and expanded can be kept high regardless of vertical or horizontal direction, and it is possible to secure the strength of 152, 352, or 552 cylindrical welds. Joints are integrated systematically with synthetic resin by PD joint and EF joint by PD parts and EF parts. Joints 10 and cut the connection of the opening port is a service Qi is a PD joint and EF joint in the form, wherein the closing by welding fixation. (Invention 20)

Next, FIG. 10 is a view showing a state in which (g) and (h) of FIG. 9 are combined. In particular, it can be understood how compact the remaining part is in comparison with the assembled view of FIG. Therefore, the difference can be understood at a glance even in comparison with Patent Document 1 of the prior art document. In addition, the compactness and the outflow of gas due to the action of the small diameter sealing portion and the small diameter coma can be surely prevented, and the safety at the time of joining and around the site can be secured.

In addition, no blowback can be used, which makes it safer, eliminates the need for bypass saddles for gas blocking bags, etc., reduces the area of excavation and the amount of excavation, and can reduce construction material costs and construction time. became. In addition, by unifying the openings, which will never open again, with synthetic resin, it has become possible to achieve stable closure for many years.

Next, FIG. 11 is a development view of one block arrangement of the saddle part PD line and the EF line and an arrangement structure of a pair of terminals and a pair of indicators. Here, the PD line and the EF line illustrate a wave-like or lightning-like arrangement in which the wave-like repeating or zigzag is used. In addition, a single PD line and an EF line and a pair of indicators that connect the pair of terminals and the terminals are provided. However, spiral or orbiting arrangement is omitted because it is often used for conventional joints. In the figure, reference numeral 301 is a small diameter joint seal opening, 1 is a PD sensor and service branch body of an EF joint, and 2 is a PD port and service branch body of an EF joint. PD wire and EF wire and 3 are PD joints and an EF joint. The Service Qi body PD terminal and the EF terminal as well as 4 are the Service Qi body indicator of the PD joint and the EF joint.

Next, FIG. 12 is a development view of one block arrangement of the saddle portion PD line and the EF line and an arrangement structure of a pair of terminals and a plurality of indicators. A plurality of indicators are deployed in FIG. Used for large diameter etc. In the case of a PD joint, it is used when visually checking the entire welding surface until the actual results are accumulated.

Next, FIG. 13 is a development view of a plurality of block arrangements of the saddle portion PD line and the EF line and a plurality of terminals and a plurality of indicator arrangement structures. (A wave-like or lightning-type arrangement example in which PD and EF lines are wave-like repetitive or zigzag. A spiral or circular arrangement example is not shown.)

In the figure, 2-1 is a block 1 service main body PD line and EF is a block 2-2 a block 2 service body main body PD line and an EF line. Each line is connected to the 3-1 block 1 service main body PD terminal and the EF terminal and the 3-2 block 2 service main body PD terminal and the EF terminal.

Next, 4-1 is a block 1 service main body indicator, and 4-2 is a block 2 service main body indicator. A plurality of indicators are arranged in a zigzag form for each block. In addition, there is no problem even in the arrangement other than the zigzag shape. As the diameter of 301 becomes larger, the welding area also becomes larger, which corresponds to this point.

In addition, PD lines such as 2 and 2-2 and EF lines in the service coupling, which are PD joints and EF joints, have a spiral and corrugated or lightning-shaped arrangement example illustrated in FIG. FIG. 5 of Patent Document 4 is a service coupling which is a PD joint and an EF joint in a form characterized by the arrangement structure of PD lines characterized by the spiral or circumferential arrangement example shown in FIG. (Invention No. 25)

In addition, 53 and 253 and 503 and PD lines and EF lines in 80 and 280 and 580 PD parts and EF parts are the spiral and corrugated or lightning-shaped arrangement examples described in Patent Document 4 and the spiral or spiral arrangement. The service Qty is a PD joint and an EF joint having a form characterized by a structure in which an opening is closed using a PD part and an EF part characterized by the arrangement structure of a PD line characterized by the example. (Invention No. 26)

Therefore,
In Service Team which is PD joint and EF joint used when taking out main branch other than supply pipe from main branch with large diameter, the means to increase the welding area with the conduit and increase the welding strength is a pair of PD terminal or EF A PD having a configuration characterized in that the blocks are arranged in a plurality of blocks 2-1 and 2-1 with one terminal being a PD line or an EF line connecting the terminals and the pair of terminals as one block to increase bonding strength. It is a service team of fittings and EF fittings. (Invention No. 17)

Therefore, the PD wire and the EF wire in the service team, which are PD joint and EF joint, further connect one pair of two and two and two of 2-1 and 2-2 between the terminals of 3 and 3-1 and 3-2. PD joint and EF joint in a form characterized by a structure in which a plurality of blocks such as one block or two-to-one and two-to-two or the like are arranged. It is a service team. (Invention No. 24)

Furthermore, therefore,
The auxiliary structure of the means for increasing the welding area with the conduit and increasing the welding strength in the service coupling which is a PD joint and an EF joint used when taking out the main branch other than the supply pipe from the large bore main branch is the joint The feature of the structure of deploying multiple indicators and multiple blocks with the deployment structure such as staggered arrangement as the placement area of PD lines and EF lines increases and the multiple blocks are deployed in order to increase the strength of the It is a service team that is a PD joint and an EF joint configured in the form of: (Invention No. 18)

Next, Fig. 14 shows a service team in which two sealing parts of the present invention are continuously provided (the supply pipe connection part is arranged on the small diameter joint sealing part side from the small diameter upper end part flange part. The supply pipe connection axis is a pipe axis and (K) is a plan view, and (m) is a front view. FIG. 15 is a left side view of FIG. 14, and FIG. 16 is a right side view of FIG.

Here, the service team in FIG. 14 is an initial case leading to the service team in FIG. In consideration of supply pipe abolition, as shown in FIG. 22, there are two openings, which require individual parts for closing both openings, and there is no reduction in construction material cost. It is a draft that became a service team.

FIG. 17 is a front view and a plan view of the service Q in which a part of the large diameter joint seal and the supply pipe connection portion above the cut C and a cut C in FIG. 14 are cut out, (n) is a plan view And (p) is a front view. 18 is a left side view of FIG. 17 and FIG. 19 is a right side view of FIG.

Next, an embodiment of the present invention is illustrated. FIG. 14: is serviceee which carries out continuous deployment of two seal parts of the present invention, and is supply chain connection part deployed by the small diameter joint seal side by the small diameter upper end flange part. (M) Front view and (k) Top view are illustrated. In addition, the service connection pipes of the 8 PD joints and the EF joints are directed in a direction intersecting or orthogonal to the 20 synthetic resin pipe axis lines.

Further, FIG. 17 shows a (p) front view and a (n) plan view of the service team in which the large-diameter joint seal portion above the cut-off C in FIG. 14 is cut off. FIG. 18 illustrates the left side view of FIG. FIG. 19 illustrates the right side view of FIG. FIG. 20 illustrates (c) a cross-sectional view of service team along CC and (q) a cross-sectional view along a line G-G in FIG. 33 of the large diameter component to be closed. FIG. 21 illustrates an assembled cross-sectional view of the servicing and large diameter components of FIG. FIG. 22 is a DD cross-sectional view of the service team in (v) of FIG. 17 and (G) a cross-sectional view of FIG. FIG. 34 illustrates a JJ cross-sectional view of FIG. FIG. 23 illustrates an assembled cross-sectional view of the servicing of FIG. 22, small diameter parts, and connection part parts.

The above FIG. 14 to FIG. 23 all show a series of service courses in which the supply pipe connection section is disposed closer to the small diameter joint seal side than the small diameter upper end flange section in the service series in which two seals of FIG. FIG. Since it is a well-known matter about EF junction and joints, terminals and wires, PD may be omitted as a representative.

Below, the code | symbol used is demonstrated. In FIG. 14 to FIG. 23, 1 denotes a service body of a PD joint and an EF joint, which is made of a synthetic resin such as polyethylene. 2 is a service Q body PD wire and EF wire of a PD joint and an EF joint, and is a service Q body PD terminal and an EF terminal of the 3 PD joint and an EF joint, and the light beam transmitted from the light source to the PD wire It is a part which transmits to 2 PD lines and is made to enter. In addition, the remaining light beam transmitted from the other of the pair of terminals is also transmitted and returned to the light source at the same time.

Next, 4 is a service main body indicator of the PD joint and the EF joint, and it can be visually confirmed whether PD joint or EF joint is made. Reference numeral 5 denotes a service fitting main body fixing clamp fixing portion of the PD joint and the EF joint, which is a portion to which a fixing clamp is attached when the service body main body 1 is fixed to 20 synthetic resin pipes by the fixing clamp. Reference numeral 8 denotes a service connection pipe connection portion of the PD joint and the EF joint, which is a portion where the supply pipe is connected to the service contact by an elbow or a socket. In this figure, there is no problem even if it is disposed in a direction intersecting or orthogonal to the 20 tube axes. In FIG. 24 to FIG. 27, a service charge in the case of being identical to 20 tube axes is illustrated (the other parts are the same as in FIG. 14). There is no problem in changing the arrangement of the terminals 3 and 4 so as not to hide the arrangement of the terminals 3 and 4 in the connection portion.

Next, 10 is an opening (hole saw attachment hole) of the PD joint and the EF joint, and is an opening for attaching a hole saw as a tool which is bored in 20 synthetic resin pipes and communicated with the opening. The hole sawing hole of the synthetic resin tube 22 is a hole in which the service plate and the synthetic resin tube are communicated with each other by the hole saw of the tool attached to the opening. The gas flow out of the 22 holes into the service cavity can be reliably prevented from flowing out of the service hole through the holes 22 pierced by the action of the large diameter and small diameter joint sealing portions and pieces described later. It has become. Therefore, as in Patent Document 1 of the prior art, it is not necessary to use a hole saw for preventing gas leakage. Therefore, the service team of the present invention has a structure that does not require a built-in hole saw.

Next, in the openings (hole saw attachment holes) of 10 PD joints and EF joints, 11 PD joints and the upper end of openings (hole saw attachment hole upper end face) of EF joints or 12 hollow large diameter joints Since the large diameter upper end flat portion of the sealing portion is disposed, the opening portion is structured with a synthetic resin by PD bonding or EF bonding with the flat welding surface of the back surface of the flange portion of the PD component and EF component described later. It can be integrated into a long-lasting and reliable seal. Further, the periphery of the opening portion is arranged in the 13 PD joints and the large diameter upper end collar portion of the EF joint.

Next, 14 is a small diameter upper end collar portion of the PD joint and the EF joint, and a small diameter upper end flat portion of the hollow small diameter joint seal portion 15 of 15 is a flat welding surface of a small diameter upper end of 400 described later ). The small diameter upper end flanges of the 14 PD joints and the EF joints are protruded from the outer peripheral surface of the main body, but when the supply pipe is abolished by cutting C-C, a part of the small diameter joint female thread 302 and the 8 PD joints And since a part of the service supply pipe connection part of the EF joint and the large diameter joint seal part 100 are cut and discarded, a cutting tool such as a sharper is put on the small diameter upper end flat part of the 15 hollow small diameter joint seal parts. It has two purposes: to position it by pressing, to perform a cutting operation, and to become part of the 14 PD joints and the small diameter upper end welding surface of the EF joint. In addition, before the cutting operation, the small diameter sealing portion 240 is attached first and the gas outflow prevention is surely performed, so that the safety operation can be performed.

Therefore,
The service coupling of the PD joint and the EF joint deploys two hollow seals of a hollow large diameter joint seal and a hollow small diameter joint seal, and the large diameter upper end of the hollow large diameter joint seal 11 is a service of a PD joint and an EF joint characterized by a structure in which a flat portion and a small diameter upper end flat portion of a hollow small diameter joint sealing portion are provided. (Invention 11)

Next, 17 is a large diameter no-blowback attachment portion of the PD joint and the EF joint, and is disposed on the outer peripheral surface of the 100 large diameter joint seal portion, and 40 large diameter encapsulation during hole saw attachment and drilling work and It is a part to which no blow back is attached to prevent excessive gas outflow to the outside at the time of work to attach the part and reliably prevent gas outflow. Also, 18 is a small diameter no-blow-back attachment portion of the PD joint and the EF joint, and is disposed on the outer peripheral surface of the small diameter joint seal portion 300 and is left behind when the supply pipe is abolished. This is a site where a no blow back is attached so as not to cause an excessive gas outflow to the outside at the time of an operation to securely prevent the gas outflow by attaching the small diameter sealing portion 240. Also, 18 may not be used because 240 enclosures are attached first.

Next, in (m) of FIG. 14, with respect to the welding surface around the opening and the like, 178 are three welding surfaces of large diameter joints continuing, and the service main body of 1 PD joint and EF joint at the time of product manufacture Of the flat welding surface of the upper end of the large diameter joint 172 and the hollow chamfered surface welding surface of the large diameter joint chamfered portion 173 and the hollow inner peripheral surface welding surface of the large diameter joint 174 of the large diameter joint It consists of three aspects. Furthermore, the large diameter joint cylindrical hollow inner peripheral surface welding surface 174 strikes and is continuously connected to a plane orthogonal to or intersected with the large diameter joint female screw axis of 171 integrally molded at the same time.

Next, FIG. 15 is a left side view of FIG. 14, and the above description is almost sufficient. However, since a hidden line is hard to see in FIG. 14, in this figure, the large diameter joint inclined portion of typical 103b and the small diameter joint inclined portion of 303b of each sealed portion are added to show the positional relationship of each sealed portion. In addition, clarify the relationship between the 8 PD joints as well as the service connections of the EF joints. FIG. 16 is a right side view of FIG. 14 and is similar to FIG.

Next, FIG. 17 shows each remaining part below cut C in FIG. In (n), only cutting line D-D is filled in, and in (p), a part of the small diameter joint female thread portion 302 which has become a remaining portion (a front view and a right side view of the cutting blade main body in FIG. And the relationship between the three welding surfaces of the cutting blade and the joint in Fig. 29 and the plane orthogonal to or intersecting with the joint female screw shaft axis.) The small diameter joint of 403 is made continuous by cutting work at the supply pipe abolition work site The three welding surfaces (due to cutting work) and a plane (due to cutting work) advanced by cutting that intersects or is orthogonal to the small diameter joint threaded portion axis of 405 are cut out.

Three welded small diameter joints of 403 small diameter joints (by cutting operation) are flat welding surfaces of small diameter upper end of 400 (by cutting operation) and hollow beveled surface welding surfaces of small diameter joint of 401 with small diameter joints ( It consists of a cutting operation) and a welding surface (by cutting operation) of a small diameter cylindrical hollow inner peripheral surface 402. Furthermore, the welding surface of the small-diameter cylindrical hollow inner peripheral surface 402 (due to cutting work) strikes against a cutting plane (due to cutting work) that intersects or is orthogonal to the small-diameter joint female thread portion axis of 405 and continues to 405 It is connected.

In addition, in the cut supply pipe connecting portion 8, three welding faces in which the connecting portion 600 continues are cut so as to obtain the relationship diagram of FIG. 29 by the cutting tool (cutting blade) illustrated in FIG. Although a female screw is shown in the figure of 29, it is the inner surface of the cylindrical connecting portion 8). Here, three welding surfaces continuous at the connection portion 600 are a flat welding surface at the upper end of the connection portion 601 (due to cutting work) and a hollow chamfered surface welding surface (due to cutting work) of the connection chamfered portion 602 A connecting portion 603 is constituted by a welding surface (by cutting operation) of a cylindrical hollow inner peripheral surface. In addition, a plane (according to the cutting operation) which has been cut or intersected or orthogonal to the connection axis of the joint 605 is also cut at the same time.

Next, FIGS. 18 and 19 are a left side view and a right side view, respectively, with the PD joint of 3 and the service Qie body PD terminal of the EF joint, and the PD connector of the EF terminal and 4 and the service Qie body indicator of the EF joint Each pair is deployed in the body of one service team.

Next, (s) in FIG. 20 is a C-C cross-sectional view of the service team in (c) in FIG. 14 and (q) is a diagram of large diameter parts that close the openings (hole saw attachment holes) of 10 PD joints and EF joints. GG sectional drawing is shown in figure. Both the C-C cross-sectional view and the G-G cross-sectional view are cross sections by the same plane.

Here, 40 large-diameter sealed parts for closing the openings (hole saw attachment holes) of 10 PD joints and EF joints of (s) are the lids and 60 of the individual 50 large-diameter PD parts and EF parts. 56 large diameter PD parts and a large diameter pressure reduction of 62 large diameter PD parts and EF parts equipped with a large diameter pressure reduction safety device of 99 consisting of a large diameter screw portion of 70 and a large diameter top of 70 A safety device mounting recess is provided.

Furthermore, 50 is constituted by 51 large diameter PD parts and the collar part of EF parts and 52 large diameter PD parts and screw parts of EF parts, and 60 is 61 large diameter upper end parts and 62 large diameter pressure control A safety device mounting recess, a large diameter middle portion 63 of the male screw, and a large diameter portion 64 of the lower portion. Reference numeral 70 denotes an upper end of a large diameter piece 71 of which 64 is fitted, a large diameter inclined surface portion 72, and a large diameter piece side surface portion 73. Moreover, since the enlarged view of 178 part of FIG. 20 is shown in FIG. 27, please refer.

Here, the prevention of gas outflow by the action of the 70 pieces and the large diameter joint sealing portion 100 is the 60 large diameter screw portions in which the large diameter lower portion 64 and the large diameter piece upper end portion 71 are fitted and integrated. 10 PD joints and EF which communicate with the pipe by hole saw perforation hole of the synthetic resin pipe by the large diameter joint piece fixed upper part of 103a and the large diameter piece side part of 73 contacting by screwing down Gas filled in the opening (hole saw attachment hole) of the joint is prevented from flowing out of the service carrier. Furthermore, the outflow of gas is prevented by the contact between the large diameter joint slope portion 103b and the large diameter slope portion 72. As described above, the two-stage gas outflow preventing action can surely prevent the gas outflow from the opening 10 to the outside of the service charge.

Therefore,
The service team of the PD joint and the EF joint is the three elements of combustion when joining the PD part and the EF part immediately after the prevention of the gas outflow from the conduit by the action of the cotter and the sealing part. One of the problems is that it is a service team of a PD joint and an EF joint that has features that will not lead to a disaster even if an ignition source such as a spark is generated because it excludes gas. (Invention 13)

Also, in Fig. 20 (q), please refer to the enlarged view of the three welding surfaces of PD parts and EF parts in Fig. 35 for three welding surfaces of 153 large diameter parts connected in series. The reference numeral 153 is composed of a flat welding surface on the back surface of the large-diameter component collar portion 150, a chamfered surface welding surface on the large-diameter component chamfered portion 151, and a welding surface of the large-diameter component cylindrical outer peripheral surface 152. Please refer to Patent Document 3 of the prior art for detailed description of these 153 large diameter parts continuous three welding surfaces.
Further, a plane orthogonal to or intersecting with the large diameter component screw shaft of 155 is continuously connected to the welding surface of the large diameter component cylindrical outer peripheral surface 152.

Also, in (s) in Fig. 20, please refer to the enlarged view of Fig. 27 for the three consecutive welded surfaces of 178 large diameter joints. Numeral 172 denotes a flat welding surface of the upper end of the large diameter joint, a hollow chamfered surface welding surface of the large diameter joint chamfered portion 173 and a hollow inner peripheral surface welding surface of the large diameter joint 174 of the large diameter joint. The three consecutive welded surfaces of the 178 large diameter joints are described in detail in Patent Document 3 of the prior art, so please refer to them. Further, a plane perpendicular to or intersecting with the large diameter joint internal thread portion axis 171 of the large diameter joint 171 is continuously connected to the hollow inner circumferential surface welding surface of the large diameter joint 174 of the large diameter joint.

Here, the correspondence of the welding surface is described. In (q) and (s) of FIG. 20, 150 and 172, 151 and 173, and 152 and 174 are welding surfaces to be welded, respectively. Furthermore, since 155 and 171 are in contact, even if the welding surface of the large-diameter component cylindrical outer peripheral surface of 152 and the hollow inner peripheral surface welding surface of the large-diameter joint cylindrical shape of 174 are vertically oriented, they melt and soften at the time of bonding The synthetic resin acts to prevent the flow to the large diameter joint female thread of 102. This function can cover the point where it is difficult to fix with a fixed clamp.

In 150 and 172, the area around the outer periphery of the collar 51 is a cold part that does not melt, and the synthetic resin in the welded part may expand and lift the lid, but it can be easily fixed with a fixing clamp So you can prevent the cold part from opening your mouth. Therefore, it can be inferred that the outflow of the molten synthetic resin is prevented even if the plane is directed in the vertical direction, and the increase in pressure of the molten portion can be ensured.

Therefore, it can be inferred that an increase in pressure in the melting portion can be secured. That is, by joining, the synthetic resin is integrated systematically and the condition is very good, and the opening is continuously blocked for 200 years or 300 years. In addition, the period is almost the same as the useful life of the material polyethylene. This is the performance capability of PD parts as well as EF parts and the habit of PD bonding and EF bonding.

Next, referring to FIG. 20 (s), the service of the present invention is characterized in that the large diameter joint sealing portion of 100 and the small diameter joint sealing portion of 300 have two sealing portions with different diameters. is there. The large diameter joint seal portion 100 is constituted by the large diameter joint seal portion opening 101, the large diameter joint female thread portion 102, and the large diameter joint piece fixing portion 103. Further, 103 is constituted by a large diameter joint top fixed portion 103a and a large diameter joint inclined portion 103b, and a central portion of the large diameter joint 103c is hollow. Further, the small diameter joint seal portion 300 is constituted by the small diameter joint seal portion opening portion 301, the small diameter joint female thread portion 302, and the small diameter joint piece fixing portion 303. Furthermore, 303 is comprised by 303a of small diameter joint upper part fixing part, and the small diameter joint inclination part of 303b, and the small diameter joint center part of 303c is hollow.

Therefore,
Even if the supply pipe connection portion 8 is disposed on the small diameter joint sealing portion side 300 from the small diameter upper end collar portion 14 and the supply pipe connection portion is arranged on the large diameter joint sealing portion side from the small diameter upper end collar portion Even if the pipe connection portion 8 is disposed on the large diameter joint sealing portion side 100 from the small diameter upper end collar portion 14 and the supply pipe connection portion 8 is in the same direction or at a right angle with the 20 pipes,
For service joints of PD joint and EF joint, two sealing parts of hollow large diameter joint sealing part 100 and hollow small diameter joint sealing part 300 are continuously disposed, and the large diameter joint is directed in the direction of the synthetic resin pipe. Sealed part shaft center (shaft center of hollow large diameter joint seal part of 100) and small diameter joint seal part shaft center (shaft center of hollow large diameter joint seal part of 300) of the joint opening The axis of three welding surfaces 178 including the welding surface of the chamfered surface is continuously arranged on (hole joints of 10 PD joints and hole saw attachment holes which become openings of EF joints) and further around the opening mouth. , A service coupling of a PD joint and an EF joint in the form of being continuously deployed on the opening side of the opening. (Invention 2)

In addition, the service supply pipe connections of the 8 PD joints and the EF joint are arranged in the small diameter joint female threads of the 302, and the 14 PD joints and the small diameter upper end collar of the EF joint and the small diameter joint seal of 300 A service coupling of a PD joint as well as an EF joint characterized by the structure being disposed between.

Therefore,
The 8 supply pipe connections in the service coupling of the PD joint as well as the EF joint are arranged in the small diameter joint female thread 302 and further between the small diameter upper end collar 14 and the small diameter joint seal 300 It is a service team of a PD joint as well as an EF joint in a form characterized by the structure. (Invention 27)

Furthermore, 18 PD joints and a small diameter no-blowback attachment portion of the EF joint are disposed on the outer peripheral surface of the small diameter joint seal portion 300, and 17 PD joints and the outer peripheral surface of the 100 large diameter joint seal portion The large diameter no-blow-back mounting portions of the EF joint are individually arranged. Further, both sealing portions are hollow since they include female threads.

Therefore,
The no blow back mounting parts in the service joints of PD joints and EF joints are individually disposed on the outer peripheral surfaces of the two sealing parts of the hollow large diameter joint sealing part and the hollow small diameter joint sealing part. The service team of a PD joint and an EF joint characterized by a method of using a large diameter no blow back attachment and further using a small diameter no blow back attachment when being abolished. (Invention 4)

Next, FIG. 21 illustrates an assembled cross-sectional view of the servicing of FIG. 20 and the large diameter component. FIG. 22 is a DD cross-sectional view of the service person of FIG. 17 and a G-G cross-sectional view of the small diameter part to be closed. (T) is a G-G cross-sectional view of the small diameter part to be closed, (v) is a D-D cross-sectional view of the service team, and (u) is a J-J cross-sectional view of the closed connection part. FIG. 21 is a cross-sectional view assembled by screwing (q) of FIG. 20 to (s). In this state, gas is supplied to the supply pipe and buried in the ground. When the supply pipe is to be abolished, the large diameter sealing portion side is discarded by cutting along the cutting line C of FIG. The remaining parts are a part of the small diameter joint female thread portion 302, the 14 PD joints and the small diameter upper end flange portion of the EF joint and a small diameter joint seal portion 300, as shown in (n) and (p) of FIG. It becomes a state. At the time of cutting, a sharper or the like can be cut along the upper surfaces of the small diameter upper end flange portion of the 14 PD joints and the EF joint.

The remaining parts are as shown in FIG. 17: 1 PD joint and part of service branch of EF joint and 2 PD joint and service branch of EF joint and PD lead and EF line and 3 PD joint and EF joint Service Qi body PD terminal and EF terminal and 4 PD joints and EF joint service Qi body indicator and 5 PD joints and EF joint service Qi body fixed clamp fixing part and 14 PD joints and small diameter upper end collar of EF joint Small diameter no-blow-back mounting part for the 18 PD joints and the EF joints. However, it is possible to cut off the portion on which the 5 PD joint and the service main body fixed clamp fixing part of the EF joint travel.

Next, in (v) of FIG. 22 which is a cross-sectional view of the remaining portion after cutting and discarding, the three small diameter jointed continuous 403 welding surfaces are made by cutting the small diameter joint female thread portion of the remaining 302 . Three small diameter joints of 403 continuous welding surfaces are the flat welding surface of the small diameter upper end of 400 (by cutting work) and the hollow chamfered surface welding surface of the small diameter joint chamfer of 401 (by cutting work) and the small diameter cylinder of 402 The welding surface of the small diameter cylindrical hollow inner peripheral surface of the small diameter cylindrical inner peripheral surface of the small diameter joint (by cutting operation) It abuts on a plane of cut or advanced plane (due to cutting operation) which intersects or intersects perpendicularly, and it is a continuous connection.

Here, the cutting blade for cutting the surfaces 403 and 405 is configured as illustrated in the front view and the right side view of the cutting blade main body in FIG. Reference numeral 700 denotes a cutting blade main body, which is intended to support each cutting edge and is a portion attached to a cutting tool (not shown). A single-edged blade with a continuous cutting edge of 701 flat welding surface cutting edge, 710 chamfered portion welding surface cutting cutting edge, 720 cylindrical hollow inner peripheral surface welding surface cutting cutting edge, and cutting edge advancing a plane intersecting or orthogonal to axis of 730 Are configured. By pressing and screwing a tool attached with a continuous single-edged blade, the remaining small diameter joint 302 made of synthetic resin is scraped to form a welding surface or the like.

Next, the shape of the cutting edge of this tool is divided into three welding surfaces (in a cutting operation) continuous at 600 connections and a cutting plane (in a cutting operation) which intersects or is orthogonal to the connection axial center of 605 By changing to the corresponding shape, the flat welding surface of the upper end portion of the connection portion 601 (by cutting operation) and the hollow chamfered surface welding surface of the connection portion chamfered portion 602 (by cutting operation) in FIG. And 603, it easily corresponds to 600 and 605 constituted by the welding surface (by cutting operation) of the cylindrical hollow inner peripheral surface at the connection portion.

Therefore,
The cutting tool used in the work process of cutting out three welding surfaces cuts a flat welding surface cutting edge that cuts a flat welding surface, a chamfered welding surface cutting edge that cuts a welding surface of a chamfered surface, and a cylindrical welding surface The cutting edge of cylindrical hollow inner peripheral surface welding surface cutting edge and female screw part, and cutting edge of cutting edge which cuts off a plane crossing or orthogonal to the axial center scraping the inner surface of the connecting part is one blade, and one set or plural sets A cutting tool which has a structure of a cutting tool to be deployed, and a structure capable of cutting out a plane which intersects or is orthogonal to the three hollow welding surfaces and the axial center while rotating the cutting tool;
It is service Qi, which is a PD joint and an EF joint characterized by the structure of a welding surface obtained by shaving three welding surfaces with the cutting tool having the structure. (Invention No. 22)

Furthermore, therefore,
When the supply pipe is abolished, the service team of the PD joint and the EF joint joins the 580 PD parts and EF parts that close 8 of the opening of the small diameter joint seal to the small diameter joint seal that will be the remaining part Three small diameter joint continuous welding surfaces of 600 small diameter joint including the hollow chamfered surface welding surface of the small diameter chamfered portion are cut out and deployed, and 280 of the opening of the small diameter joint sealing portion is closed 280 Of the small diameter joint 403 including the hollow chamfered surface welding face of the small diameter chamfered part joining the PD parts and the EF parts, and three consecutive welding faces of the small diameter joint are cut out and deployed I am a service person. (Invention 1)

Next, (t) is a cross-sectional view of the 280 small diameter PD parts and the EF parts shown in FIG. 33 that close 10 in FIG. 22 and is the same as (g) in FIG. . Next, (u) is the remaining part of the cut supply pipe connection, and the supply pipe is larger than the inner diameter supply pipe inner diameter of the 830 supply pipe connection at the service charge supply pipe connection of the 8 PD joints and the EF joint of the EF joint. The thickness of the connection part is cut. The connection parts of 553 corresponding to three continuous welding surfaces (by cutting work) of 600 connection parts are orthogonal to or intersected with the three welding surfaces of five continuous parts and the connection part of 555. 34 is the connection PD component and the EF component of 580 shown in FIG. 34 with a flat surface.

Here, using the front view and plan view and the bottom view of the connection part component illustrated in FIG. 34 and the JJ cross section of (u) in FIG. explain. In FIG. 34, each part is as follows. 500 is a lid of the connection part PD part and the EF part. Reference numeral 501 denotes a collar of the connection part PD part and the EF part. Reference numeral 502 denotes positioning posts for the connection part PD part and the EF part. Reference numeral 503 denotes a lid part EF of the connection part PD part and the EF part. Reference numeral 504 denotes terminals of the connection part PD part and the EF part. Reference numeral 505 denotes a lid part indicator of the connection part PD part and the EF part. Reference numeral 550 denotes a flat welding surface on the back surface of the connecting part flange. Reference numeral 551 denotes a chamfered surface welding surface of the connection part chamfered portion. Reference numeral 552 denotes a welding surface of the connecting part cylindrical outer peripheral surface. Reference numeral 553 denotes three welding surfaces in which the connection part parts are continuous. 555 is a plane orthogonal to or intersecting with the connecting part axis. Reference numeral 580 denotes a connection part PD part and an EF part.

Here, the connection portion PD parts and the EF parts 580 are constituted by the respective parts described above. In the J-J cross section of (u), the connection part PD part 503 of the connection part and the lid part EF line of the EF part of the connection part of the connection part parts 553 are arranged on the plane parallel to three welding surfaces It features an embedded structure for PD bonding as well as EF bonding in an inward direction.

Furthermore, it has the connection part PD part of 501, the connection part PD part of connection part 502 of EF part and the connection part PD part of EF part 500, and the connection part PD part of EF part and the cover part of EF part. Further, it has terminals 504 of a pair of connection parts PD parts and EF parts, and has connection parts PD parts 503 of a part connecting between a pair of terminals and a cover part EF line of the EF parts. The structure is such that a laser beam incident from one of the terminals and a light beam in the infrared region are returned to the light source side from the other terminal, and the same structure is applied to both terminals. Further, although the number of indicators 505 is one in the drawing, a plurality of indicators may be provided.

Next, the welding surface has a chamfered surface welding surface of the connection part component chamfered portion of the 551 connected continuously with the flat welding surface of the connection portion component collar back surface of the 550, and further, the chamfered surface welding surface 552 Connection part parts The welding part of 553 connection part parts in which the welding surface of a column-shaped outer peripheral surface was connected continuously is provided three continuous welding surfaces. Furthermore, the three welding surfaces have a structure in which a plane orthogonal to or intersecting with the connecting part component axis of 555 is continuously connected.

These three welding surfaces correspond to three welding surfaces (due to the cutting operation) continuous at the connection portion 600 in (v) of FIG. For details, 550 and 601 and 551 and 602 and 552 are welded to 603, respectively. In addition, since 555 and 605 are in contact with each other, 552 and 603 are configured to abut 605 so that the molten synthetic resin of 552 and 603 is prevented from flowing into the interior of the service. Therefore, the internal pressures of 552 and 603 can be secured without the fixed clamp. In 550 and 601, since the fixing clamp can be easily used, the connection PD part of the 501 and the collar part of the EF part are opened so that the molten synthetic resin can be easily prevented from flowing out.

Therefore,
In the service joints of PD joints and EF joints, the large diameter joint cylindrical hollow inner peripheral surface welding surface deployed at the time of production is characterized by a structure that abuts on a plane orthogonal to or intersected with the large diameter joint female thread axis The welding surface of the small-diameter cylindrical hollow inner circumferential surface, which is sometimes cut out, is a service contact of a PD joint and an EF joint characterized in that it abuts against a cut-away plane intersecting or orthogonal to the axis of the small-diameter joint female thread. (Invention 9)

Next, FIG. 23 is an assembled cross-sectional view of the servicing part of FIG. 17 and the small diameter parts to be closed and the connection part parts to be closed. A plug 280 closing the opening 10 of FIG. 22 is screwed into the service tie. Further, 8 is positioned by a positioning post of 580 and fixed and joined by a fixing clamp or the like. As mentioned above, when it is abolished, the service tee is integrated systematically with the synthetic resin and sealed and buried.

Next, FIG. 24 to FIG. 26 show the difference in whether the PD center of 8 in FIG. 14 and the service charge supply pipe joint axial center of the EF joint are coincident with or orthogonal to the tube axis of 20 synthetic resins, The items are omitted because they are the same as the explanation of FIG.

The codes used in FIG. 30 and FIG. 31 and FIG. 32 which will be described below are listed. Reference numeral 801 denotes a hollow cylindrical inner peripheral surface welding surface inner diameter (due to cutting work). Further, reference numeral 800 denotes a hollow cylindrical inner peripheral surface welding surface inner diameter when deployed at the time of production. Further, 810 indicates the inner diameter of the female thread valley. Moreover, 812 shows a male screw outer diameter. Further, reference numeral 804 denotes a cylindrical outer peripheral surface welding surface outer diameter. Further, 830 indicates the inner diameter of the supply pipe connection. Reference numeral 901 denotes the inner diameter of the connection cylindrical welding surface (due to cutting work). Reference numeral 905 denotes an outer diameter of the connection portion cylindrical welding surface. Reference numeral 906 denotes the connecting post positioning post outer diameter. The explanation is omitted because it is clear when looking at the figure.

Next, FIG. 27 is a partial enlarged view of FIG. The relationship between the welding surface and the inside diameter of the hollow cylindrical inner peripheral surface welding surface 800 and the inside diameter of the female thread 810 is illustrated. Also, Figure 28 and Figure 29 have already been described.

Next, FIG. 30 is a relationship diagram between the inner diameter of the joint female thread valley and the inner diameter (including the inner diameter of the welding surface by cutting) of the hollow cylindrical inner peripheral surface welding surface. This FIG. 30 is applied to a joint that closes an opening by PD jointing or EF jointing of PD parts or EF parts having three welding surfaces and structurally integrating them with a synthetic resin. The hollow cylindrical inner peripheral surface welding surface inner diameter which is the conditions described in the figure is 800 hollow cylindrical inner peripheral surface welding surface inner diameter or 801 hollow cylindrical inner peripheral surface welding surface inner diameter (due to cutting work) It may be a welding surface made by cutting or a welding surface provided at the time of production. Further, the diameter of the female thread valley is the diameter of the female thread of the large diameter joint seal portion of 100 or the small diameter joint seal portion of 300. Or, it may be the inner diameter of the 8 supply pipe connections.
The clear conditional expression is
Hollow cylindrical inner peripheral surface welding surface inner diameter> diameter of female thread valley
Therefore, the inner diameter of the hollow cylindrical inner peripheral surface welding surface is necessarily larger than the diameter of the female thread valley.
As an auxiliary formula,
Hollow cylindrical inner peripheral surface welding surface inner diameter> diameter of female thread hollow inner diameter cylindrical welding surface inner surface diameter> diameter of female thread of sealing portion hollow cylindrical inner peripheral surface welding surface inner diameter> supply tube connection portion It is the inside diameter.

Therefore, as a representative, when the supply pipe is abolished, the service couplings of the PD joint and the EF joint have three welding surfaces of which the small-diameter joint cut out is continuous, and are continuous to the hollow chamfered surface welding surface of the chamfered portion at the welding surface. The inner diameter of the hollow cylindrical inner peripheral surface welding surface is a serviceee of a PD joint and an EF joint having a feature that is larger than the diameter of the female thread of the hollow small diameter joint female thread portion. (Invention 6)

What is written in the drawing is FIGS. 7 and 9 and FIGS. 17 and 20 and FIGS. 22 and 27 and the conditional expressions hold.

Next, FIG. 31 shows the relationship between the external diameter of the external thread of the small diameter and large diameter parts and the outer diameter of the cylindrical outer peripheral surface welding surface. The conditional expressions for PD parts having male threads and EF parts are as follows:
External diameter of external thread> 812 of cylindrical outer peripheral surface welding surface of 804
It becomes. The outer diameter of the cylindrical outer peripheral surface welding surface is necessarily large.

Therefore,
The PD parts and EF parts that close the large diameter opening and the small diameter opening in the service of the PD joint and the EF joint have the outer diameters of the cylindrical outer peripheral surface welding surfaces 152 and 352 provided to the parts. It is characterized in that it is larger than the outer diameter of the screws 52 and 252, and further, a plane 155 or 355 is provided between the cylindrical welding surface and the screw, which intersects or is orthogonal to the male screw axis. Three welding surfaces 153 and 353 corresponding to three welding surfaces of the part and flat surfaces 155 and 355 orthogonal to or intersecting with the screw axis and a large diameter hollow cylindrical inner surface welding surface inner diameter 800 in the joint This embodiment is characterized by a structure larger than the diameter 810 of the large diameter female thread and a structure in which the inner diameter 801 of the small diameter hollow cylindrical inner peripheral surface welding surface is larger than the diameter 810 of the small diameter female thread It is a service Qi of the PD joints as well as the EF joint. (Invention 5)

What is written in the drawing is FIGS. 7 and 9 and FIGS. 17 and 20 and FIGS. 22 and 27 and the conditional expressions hold.

Next, FIG. 32 is a relationship diagram between the positioning post outer diameter of the connection portion, the outer diameter of the connection portion cylindrical welding surface, and the inner diameter of the supply pipe connection portion. The conditional expression for the outer diameter of the connection cylindrical welding surface is
905 connection part cylindrical welding surface outer diameter> supply pipe connection part inner diameter> 906 positioning post outer diameter for connection part
It becomes. The outer diameter of the connection portion cylindrical welding surface is necessarily larger than the outer diameter of the connection portion positioning post. It is FIG. 22 which is filled in in the figure, and the conditional expression is satisfied.

Next, Figure 33 and Figure 34 have already been described.

Next, FIG. 35 is an enlarged description of three welding surfaces and the like of the PD part and the EF part, and has already been described. Please refer to the drawing if it is too small to read.

finally,
Since the service fitting, which is a PD joint and an EF joint, ensures the prevention of gas outflow by the action of the sealing part and the top, the gap between the PD joint and the EF joint opening and the PD part and the collar of the EF part is ensured. A service packing which is a PD joint and an EF joint having a structure characterized in that a sheet packing or the like is deployed, the part is screwed in, and the opening is temporarily sealed to make temporary embedding possible. (Invention No. 23)

The present invention can also be applied to a service team who takes out a branch such as 75 mm, 100 mm or 150 mm from a main pipe with a large diameter for applications other than small diameter supply pipes, even when the branch is abolished. The present invention can be used as well.

400 Flat welding surface of small diameter upper end (by cutting operation)
Hollow chamfered surface welding surface of small diameter joint chamfered part (by cutting operation)
402 Weld surface of small diameter cylindrical hollow inner surface (by cutting operation)
403 Small diameter joint Three consecutive welding surfaces (by cutting work)
405 Small-diameter joint threading plane which intersects or is orthogonal to the center axis of screw thread (by cutting operation)
600 connection Three consecutive welding surfaces (by cutting operation)
601 Flat welding surface of upper end of connection (by cutting operation)
602 Hollow chamfered surface welding surface of connection chamfered part (by cutting operation)
603 Welded surface of cylindrical hollow inner circumferential surface at connection part (by cutting operation)
605 Cutting plane that intersects or is orthogonal to the connection axis (by cutting operation)

801 Hollow cylindrical inner surface welding surface inner diameter (by cutting operation)
800 Hollow cylindrical inner peripheral surface Weld surface inner diameter 810 Inner diameter of female thread valley (Common for the small diameter seal and the large diameter seal female thread)
812 Male thread outer diameter 804 Cylindrical outer peripheral surface welding surface outer diameter 830 Supply pipe connection portion inner diameter 901 Connection portion cylindrical welding surface inner diameter (by cutting work)
905 Connection part Cylindrical welding surface outer diameter 906 Positioning post outer diameter for connection part

OFF A Position A for cutting unnecessary parts at the time of abolition
OFF C Position C where unnecessary parts are cut off
OFF E Position to cut off unnecessary parts at the time of abolition
1 Service Qi main body of PD joint and EF joint 2 Service Qi body PD line of EF joint and EF joint and EF wire 2-1 Block 1 Service Qi body PD line and EF line 2-2 Block 2 Service Qi body PD line and EF Service Qi main body PD terminal and EF terminal 3-1 block 1 service Qi main body PD terminal and EF terminal of wire 3 PD joint and EF joint
3-2 Block 2 Service Qi body PD terminal and EF terminal 4 PD joint and EF joint service Qi body indicator 4-1 Block 1 service Qi body indicator 4-2 Block 2 service Qi body indicator 5 PD joint and EF joint service Q body fixed clamp fixed part 8 PD joint and service joint supply pipe connection part 10 of EF joint PD joint and opening of EF joint (hole saw attachment hole)
11 Opening upper end of PD joint and EF joint (upper end face of hole saw attachment hole)
12 Large diameter upper end flat portion 13 of the hollow large diameter joint seal portion 13 Large diameter upper end flange portion 14 of the PD joint and EF joint PD joint of small diameter upper end portion of the EF joint and EF joint 15 Small diameter of the hollow small diameter joint seal portion Upper end flat portion 17 PD joint and large diameter no blow back attachment portion 18 of EF joint PD joint and small diameter no blow back attachment portion 20 of EF joint 20 pipe made of synthetic resin 22 hole made of synthetic resin pipe hole saw 50 large diameter PD Parts and lids of EF parts 51 Large diameter PD parts and collar parts of EF parts 52 Threads of large diameter PD parts and EF parts 53 Large diameter PD parts and lids of EF parts EF wire 54 Large diameter PD parts and EF parts Terminal 55 Large diameter PD parts and lid parts indicator of EF parts 56 Large diameter PD parts and lid parts safety device mounting part of EF parts 57 Large Projections for tools with diameter PD parts and EF parts 40 Large diameter sealed part 60 Large diameter screw part 61 Large diameter upper end part 62 Large diameter pressure suppression safety device mounting recess 63 Large diameter middle part 64 Large diameter lower part 70 Large diameter piece 71 Large Diameter top end portion 72 Large diameter sloped portion 73 Large diameter coma side surface portion 80 Large diameter PD parts and EF parts 99 Large diameter pressure suppression safety device 100 Large diameter joint seal portion 101 Large diameter joint seal portion opening 102 Large diameter joint Screw part 103 Large diameter joint coma fixed part 103a Large diameter joint coma fixed upper part 103b Large diameter joint inclined part 103c Large diameter joint center part 150 Flat welding surface 151 of large diameter parts collar part back surface Chamfering surface welding of large diameter parts chamfered part Surface 152 Large diameter parts Column outer peripheral welding surface 153 Large diameter parts Consecutive three welding surfaces 155 Large diameter parts Planes orthogonal to or intersect with screw axis 171 Large diameter joints are orthogonal to screw axis Cross flat surface 172 Flat welding surface of the upper end of large diameter joint 173 Hollow chamfered surface welding surface of large diameter joint chamfered portion 174 Large diameter joint cylindrical hollow inner peripheral surface welding surface 178 Large diameter joint Three consecutive welding Face 250 Small diameter PD parts and lid parts of EF parts 251 Small diameter PD parts and collar parts of EF parts 252 Small diameter PD parts and screw parts of EF parts 253 Small diameter PD parts and lids of EF parts EF wire 254 Small diameter PD parts and EF parts Terminal 255 Small diameter PD parts and lid parts indicator of EF parts 256 Small diameter PD parts and lid parts safety device mounting part of EF parts 257 Small diameter PD parts and convex parts for tools of EF parts 240 small diameter enclosing parts 260 small diameter screw parts 261 small diameter upper end Part 262 Small diameter pressure suppression safety device mounting recess 263 Small diameter middle part 264 Small diameter lower part 270 Small diameter piece 271 Small diameter top end 272 Small diameter sloped portion 273 Small diameter top side portion 280 Small diameter PD parts and EF parts 299 Small diameter pressure control safety device 300 Small diameter joint sealing portion 301 Small diameter joint sealing portion opening 302 Small diameter joint female thread portion 303 Small diameter joint portion Fixing portion 303a Small diameter joint top fixing portion 303b Small diameter joint inclined portion 303c Small diameter joint central portion 350 Flat welding surface 351 of small diameter part flange back surface Chamfering surface of small diameter part chamfering surface 352 Welding surface 353 of small diameter cylindrical outer surface Small diameter part continuous three welding faces 355 Small diameter part plane perpendicular to or intersecting with screw axis

500 connection part PD part and lid part 501 of EF part connection part PD part and collar part 502 of EF part connection part PD part and positioning post 503 of EF part connection part PD part and lid part EF part 504 of EF part connection part PD Parts and terminals of EF parts 505 Connection parts PD parts of EF parts and lid parts indicator 550 of EF parts Flat welding surface 551 of joint part parts on the back side Chamfering face of connection part chamfered part 552 Connection part parts of cylindrical outer peripheral surface Welding surface 553 Connecting part parts Three consecutive welding faces 555 Connecting part parts Plane 580 orthogonal to or intersecting with axis of connecting part PD parts and EF parts

700 cutting blade main body 701 flat welding surface cutting edge 710 chamfered portion welding surface cutting edge 720 cylindrical hollow inner peripheral surface welding surface cutting edge 730 cutting edge advancing a plane intersecting or orthogonal to the axial center

Claims (26)

At the time of abolition of the supply pipe, Service Tee of PD joint and EF joint is a small diameter chamfering part for joining the PD parts and EF parts that close the opening of the small diameter joint sealing part to the small diameter joint sealing part A small diameter joint including a hollow chamfered surface welding face of 3 and having three continuous welding faces cut out and deployed. (Invention 1) For service joints of PD joint and EF joint, two sealing parts of hollow large diameter joint sealing part and hollow small diameter joint sealing part are continuously provided, and the large diameter joint sealing is made in the direction of synthetic resin pipe. The part axis and the small diameter joint sealing part axis are continuously arranged on the joint opening axis, and further, the axis of three welding surfaces including the welding surface of the chamfered surface is opened around the opening opening. The service tip of the PD joint and the EF joint according to claim 1, characterized in that they are continuously deployed on the port side. (Invention 2) The supply pipe connection in the service coupling of the PD joint as well as the EF joint is characterized in that the structure is arranged at the female thread of the small diameter joint and further between the small diameter upper end collar and the large diameter joint seal. A service channel of the PD joint and the EF joint according to claim 1 and claim 2. (Invention 3) The no blow back mounting parts in the service joints of PD joints and EF joints are individually disposed on the outer peripheral surfaces of the two sealing parts of the hollow large diameter joint sealing part and the hollow small diameter joint sealing part. The PD joint and the EF joint according to any one of claims 1 to 3, characterized in that the large diameter no blow back attachment is used, and the use of the small diameter no blow back attachment at the time of decommissioning is further characterized. Service Qi. (Invention 4) The PD parts and EF parts that close the large diameter opening and the small diameter opening in service joints of PD joints and EF joints have a cylindrical outer peripheral surface welding surface outer diameter that is greater than the external thread outer diameter deployed on the parts It is characterized in that it is characterized by providing a plane which intersects or is orthogonal to the male screw axis or between the cylindrical welding surface and the screw, and three corresponding to the three welding surfaces of the part. The welding surface and a plane perpendicular to or crossing the screw shaft center are characterized, and the inner diameter of the large diameter hollow cylindrical inner peripheral surface welding surface of the joint is characterized in that the inner diameter is larger than the diameter of the large diameter female thread valley. And a service charge of the PD joint and the EF joint according to claim 2 and claim 3 and claim 4. (Invention 5) At the time of abolition of the supply pipe, the service coupling of the PD joint and the EF joint has three welded surfaces in which the small-diameter joint cut out is continuous, and a hollow cylinder connected to the hollow chamfered surface welded surface of the chamfer in the welded surface. The PD joint according to claim 1 and claim 2 and claim 3 and claim 4 and claim 5, characterized in that the inner diameter of the inner peripheral surface welding surface is larger than the diameter of the female thread of the hollow small diameter joint female thread portion. And service fittings of EF fittings. (Invention 6) Seals in the service joints of PD joints and EF joints are provided with hollow large diameter joint tops fixed with large inner diameter, large diameter joint inclined portions and large diameter joint female threads in hollow large diameter joint sealing portions Further, the hollow small diameter joint sealing portion is characterized in that a hollow small diameter joint fixing upper portion having a small inner diameter, a small diameter joint inclined portion, and a small diameter joint female screw portion are provided in the hollow small diameter joint sealing portion. And the service coupling of the PD joint and the EF joint according to claim 4 and claim 5 and claim 6. (Invention 7) Although the service team of PD joints and EF joints determines whether to install a group of pressure suppression safety devices according to the environment such as ambient temperature and humidity at the time of welding (in consideration of the latitude and regional characteristics), Sometimes, the large diameter pressure control safety device can be equipped with the large diameter pressure control safety device mounting recess, and when abolished, the small diameter pressure control safety device can be equipped with the small diameter pressure control safety device mounting recess. 2 and claim 3 and claim 4 and claim 5 and claim 6 and claim 7 and claim 8 and claim 7 and 7 and a service charge of the EF fitting. (Invention 8) In the service joints of PD joints and EF joints, the large diameter joint cylindrical hollow inner peripheral surface welding surface deployed at the time of production is characterized by a structure that abuts on a plane orthogonal to or intersected with the large diameter joint female thread axis The welding surface of the small-diameter cylindrical hollow inner circumferential surface, which is cut off at the same time, is characterized in that it abuts on a cut-away plane which intersects or is orthogonal to the axis of the small-diameter joint female thread portion A serviceee of the PD joint and the EF joint according to claim 4 and claim 5 and claim 6 and claim 7 and claim 8. (Invention 9) The service joints of the PD joint and the EF joint are continuous including the welding surfaces of the large diameter joint sealing portion axis and the small diameter joint sealing portion axis, and the chamfered surface joining the PD parts and the EF parts closing the opening. A feature of the present invention is characterized in a structure in which a plurality of welding face axes are on one axis, and a structure in line with the axes of the PD part and the EF part closing the opening. And the service of the PD joint and the EF joint according to claim 3 and claim 4 and claim 5 and claim 6 and claim 7 and claim 8 and claim 9. (Invention 10) The service coupling of the PD joint and the EF joint deploys two hollow seals of a hollow large diameter joint seal and a hollow small diameter joint seal, and the large diameter upper end of the hollow large diameter joint seal A flat portion and a small diameter upper end flat portion of a hollow small diameter joint sealing portion are characterized in that the structure is provided. And a service coupling of the PD joint and the EF joint according to claim 8 and claim 9 and claim 10. (Invention 11) In service joints of PD joints and EF joints, the upper fixed portion and the small diameter side portion of the small diameter joint sealing portion which is hollow when the supply pipe is abolished, and the inclined portion and the small diameter slope portion of the small diameter joint sealing portion which is hollow, By acting in contact with each other, the upper fixed portion and the large diameter side surface portion of the large diameter joint sealing portion which is hollow at the time of new construction and the inclined portion and the large diameter slope portion of the large diameter joint sealing portion which is hollow are additionally formed. The present invention is characterized in that it has a structure in which the outflow of gas from the conduit is prevented by acting in contact with each other, and claims 1 and 2 and 3 and 4 and 5 and 6 and claim 6 A service charge of the PD joint and the EF joint according to claim 7 and claim 8 and claim 9 and claim 10 and claim 11. (Invention No. 12) The service team of the PD joint and the EF joint is the three elements of combustion when joining the PD part and the EF part immediately after the prevention of the gas outflow from the conduit by the action of the cotter and the sealing part. Claims 1 and 2 and claims 3 and 4 and claim 4 have features that do not lead to catastrophe even if an ignition source such as a spark is generated because it excludes a gas which is one of the following. 5 and claim 6 and claim 7 and claim 8 and claim 9 and claim 10 and claim 10 and claim 11 and claim 12 of the present invention. (Invention 13) The service joints of the PD joint and the EF joint are characterized in that they have a structure without the need to incorporate a hole saw. Claim 1 and Claim 2 and Claim 3 and Claim 4 and Claims 5 and 6 and Claim 7 And the service junction of the PD joint and the EF joint according to claim 8 and claim 9 and claim 10 and claim 11 and claim 12 and claim 13. (Invention No. 14) Service joints of PD joints and EF joints have at least a C-chamfered portion or a R-chamfered hollow chamfered surface welding surface, and the welding surface is a flat welding surface at the upper end or a cylindrical hollow inner circumferential surface welding surface And two welding surfaces that are individually continuous, and the welding surfaces have three welding surfaces that are both continuous with the flat welding surface of the upper end or the cylindrical hollow inner circumferential welding surface, A structure in which a PD component and an EF component having a welding surface corresponding to the welding surface are structurally integrated with a synthetic resin by PD bonding and EF bonding, and the opening of the joint is closed by welding. 1 and 2 and 3 and 4 and 5 and 6 and 7 and 7 and 8 and 9 and 10 and 11 respectively. Services Qi PD joints and EF joint according to the pre claim 12 and claims 13 and 14. (Invention 15) For service joints of PD joints and EF joints, from the tube side made of synthetic resin, in the small-diameter joint seal, the small-diameter joint sealing portion opening axis, the small-diameter joint inclined portion axis, the small-diameter joint top and the small-diameter joint The female thread axis is continuously arranged on the same small diameter axis, and further, in the large diameter joint seal, the large diameter joint sealing portion opening axis and the large diameter joint inclined portion axial center are fixed The upper part and the large diameter joint female screw axis are continuously arranged on the same large diameter axis, and further, the hollow chamfered surface welding face of the large diameter joint cylindrical hollow inner peripheral surface welding face axial center and the large diameter joint chamfered portion A structure in which the planar welding surface axial center of the shaft center and the upper end of the large diameter joint is continuously disposed on the same large diameter welding surface axis, and the three axial lines are arranged in order and coincide with the joint opening axial center 1), 2), 3), 4), and 5) 6 and claim 7 and claim 8 and claim 9 and claim 10 and PD joint and EF joint service Qi according to claim 11 and claim 12 and claims 13 and 14 and claim 15. (Invention No. 16) In Service Team which is PD joint and EF joint used when taking out main branch other than supply pipe from main branch with large diameter, the means to increase the welding area with the conduit and increase the welding strength is a pair of PD terminal or EF The present invention is characterized by a structure in which a plurality of blocks are arranged as one block, and a PD line or an EF line connecting terminals and the pair of terminals is one block, to increase the bonding strength. Claim 4 and claim 5 and claim 6 and claim 7 and claim 8 and claim 9 and claim 10 and claim 11 and claim 12 and claim 13 and claim 14 and claim 15 and claim 16: The service coupling of the PD coupling described in 16 and the EF coupling. (Invention No. 17) The auxiliary structure of the means for increasing the welding area with the conduit and increasing the welding strength in the service coupling which is a PD joint and an EF joint used when taking out the main branch other than the supply pipe from the large bore main branch is the joint The feature of the structure of deploying multiple indicators and multiple blocks with the deployment structure such as staggered arrangement as the placement area of PD lines and EF lines increases and the multiple blocks are deployed in order to increase the strength of the Claim 1 and claim 2 as well as claim 3 and claim 4 and claim 5 and claim 6 and claim 7 and claim 8 and claim 9 and claim 10 and claim 12 and claim 12 P in the form of claim 13 and claim 14 and claim 15 and claim 16 and claim 17 Service Qi is a joint and EF joint. (Invention No. 18) In the service coupling which is a PD joint and an EF joint, the molten synthetic resin of the cylindrical welding surface is orthogonal to or intersects with the connecting part axis cut by the flat cutting blade which cuts the inner surface of the female screw part and the connecting part. By hitting the surface, it is prevented from flowing out to the female screw part and the connection part, and the pressure of the melted and expanded synthetic resin can be kept high regardless of the vertical direction or horizontal direction, and the cylindrical welded part strength is secured. 1 and 2 as well as 3 and 4 as well as 4 and 5 as well as 6 and 7 as well as 7 and 8 as well as claim 9 and 10 as well as 12 and claim 13 and claim 14 and claim 15 and claim 16 and claim 17 and claim 18 D Service Qi is a joint and EF joint. (Invention No. 19) In PD parts and EF parts, the molten synthetic resin of the cylindrical welding face, which is one of the three welding faces, is a flat cutting blade that cuts the inside surface of the female thread and the connection in the service that is the PD joint and the EF joint. The plastic is melted and expanded without being involved in the vertical direction or horizontal direction because it is prevented from flowing out to the female screw portion and the connecting portion by abutting on a surface orthogonal to or intersecting with the axial center of the connecting portion cut out in The pressure of the joint can be kept high, and the joint opening can be structurally integrated with the synthetic resin by the PD joint and the EF joint with PD parts and EF parts having features that can secure the columnar welded part strength, and the joint opening The mouth is closed by welding and fixed, and claim 1 and claim 2 and claim 3 and claim 4 and claim 5 and claim 5 Claim 6 and Claim 7 and Claim 8 and Claim 9 and Claim 10 and Claim 11 and Claim 12 and Claim 13 and Claim 14 and Claim 17 and Claim 17 21. A service Qi which is the PD joint and the EF joint according to claim 18 and claim 19. (Invention 20) The cutting tool used in the work process of cutting out three welding surfaces cuts a flat welding surface cutting edge that cuts a flat welding surface, a chamfered welding surface cutting edge that cuts a welding surface of a chamfered surface, and a cylindrical welding surface The cutting edge of cylindrical hollow inner peripheral surface welding surface cutting edge and female screw part, and cutting edge of cutting edge which cuts off a plane crossing or orthogonal to the axial center scraping the inner surface of the connecting part is one blade, and one set or plural sets A structure of a cutting tool to be deployed, the structure of a cutting tool (invention 21) capable of cutting out a plane which intersects or is orthogonal to the three hollow welding surfaces and the axial center while turning the cutting tool;
The structure of the welding surface obtained by cutting out three welding surfaces with the cutting tool having the above structure is characterized by the features of claim 1 and claim 2 and claim 3 and claim 4 and claim 5 and claim 6 and claim 7 And claim 8 and claim 9 and claim 10 and claim 11 and claim 12 and claim 13 and claim 14 and claim 15 and claim 16 and claim 17 and claim 18 and claim 19 and claim 19 The service Qi which is the PD joint and the EF joint according to Item 20. (Invention No. 22) Since the service fitting, which is a PD joint and an EF joint, ensures the prevention of gas outflow by the action of the sealing part and the top, the gap between the PD joint and the EF joint opening and the PD part and the collar of the EF part is ensured. A sheet packing or the like is deployed, and the part is screwed to temporarily seal the opening to make temporary filling possible. This is characterized by a structure capable of temporary embedding. Claims 6 and 7 and Claims 8 and 9 and Claims 10 and 11 and Claims 12 and 13 and Claims 14 and 15 and Claims 16 and 17 and Claim 18 And a service coupling which is the PD joint and the EF joint according to claim 19 and claims 20 and 21. (Invention No. 23) The PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are one wire connecting between a pair of terminals, and the one pair of terminals and one wire connecting are one block or one block or A multi-block deployment structure is characterized by claim 1 and claim 2 and claim 3 and claim 4 and claim 5 and claim 6 and claim 7 and claim 8 and claim 9 and claim 10 and claim 10 The PD according to claim 11 and claim 12 and claim 13 and claim 14 and claim 15 and claim 16 and claim 17 and claim 18 and claim 19 and claim 20 and claim 21 and claim 22 Service Qi, which is a fitting and an EF fitting. (Invention No. 24) The PD wire and the EF wire in the service coupling which is a PD joint and an EF joint are characterized by the arrangement structure of the PD line characterized by a spiral and corrugated or lightning type arrangement example and a spiral or circular arrangement example. 1 and claim 2 as well as claim 3 and claim 4 and claim 5 and claim 6 and claim 7 and claim 8 and claim 9 and claim 10 and claim 12 and claim 13 and claim 13 PD joint and EF according to claim 14 and claim 15 and claim 16 and claim 17 and claim 18 and claim 19 and claim 20 and claim 21 and claim 22 and claim 23 and claim 24 Service Qi which is a fitting. (Invention No. 25) PD lines and EF lines in PD parts and EF parts are PD parts and EF parts characterized by the arrangement structure of PD lines characterized by spiral and corrugated or lightning-shaped arrangement examples and spiral or circular arrangement examples The present invention is characterized by the structure of closing the opening by use of the present invention, and the first, second, third, third, fourth, fifth, sixth, seventh, eighth, ninth, and ninth claims. 10 and claim 11 and claim 12 and claim 13 and claim 14 and claim 15 and claim 16 and claim 17 and claim 18 and claim 19 and claim 20 and claim 21 and claim 22 and claim 22 A service team which is the PD joint and the EF joint according to claim 23 and claim 24 and claim 25. (Invention No. 26) Also, the invention is characterized in that the supply pipe connection portion in the service of the PD joint and the EF joint is disposed in the small diameter joint female thread, and further disposed between the small diameter upper end flange portion and the small diameter joint seal portion. 1 and the invention 2 and the invention 3 and the invention 4 and the invention 5 and 6 and the invention 6 and 7 and the invention 7 and 8 and the invention 9 and 10 and the invention 10 and the invention 11 and the invention 12 and the invention 13 And Inventive Part 14 and Inventive Part 15 and Inventive Part 16 and Inventive Part 17 and Inventive Part 18 and Inventive Part 19 and Inventive Part 21 and Inventive Part 21 and Inventive Part 22 and Inventive Part 24 and Inventive Part 25 and Inventive The service channel of the PD joint and the EF joint described in Part 26(Invention 27)