JP2019207019A - Pipe conduit construction jig and pipe conduit construction method - Google Patents

Abstract

To provide a pipe conduit construction jig and a pipe conduit construction method, capable of efficiently performing attachment/detachment work of a penetrable body penetrating a flow passage.SOLUTION: A pipe conduit construction jig 1 comprises a covering member 10 and a fixing member 20. The covering member 10 has a rotation restricting part 12 that contacts with at least a part of a nut member VN to restricts its rotation, and covers and seals a closing member through-bore Bo side of a gas plug body VB together with the nut member VN. The fixing member 20 is configured to press and fix the covering member 10 to a gas plug GV.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe construction jig and a pipe construction method, and more particularly to a pipe construction jig and a pipe construction method used for construction of a pipeline through which a fluid flows.

  Conventionally, for example, the technique of Patent Document 1 is known as a method for constructing a valve (gas plug) while a combustible gas (for example, city gas) is circulating.

This Patent Document 1
(A) Enclose the entire valve in a so-called no-blow work bag and shut it off from the outside.
(B) The valve body (hereinafter referred to as “closing member”) is removed from the valve body by turning in a loosening direction with a tool such as a wrench.
(C) After inserting the “closing member” through the insertion port of the valve body (hereinafter referred to as “closing member insertion port”), the tool is tightened with a tool and attached to the valve body.
(D) removing the no-blow working bag from the valve;
It is configured so as to follow such a procedure.

  According to such a technique, the attachment and detachment of the closing member is performed in the no-blow work bag, so that it is possible to work relatively safely while suppressing the outflow of the combustible gas to the outside.

JP 09-250700 A

  By the way, among the valves connected to the gas pipe, in addition to a type in which a “closing member” as in Patent Document 1 is directly screwed into the valve body (hereinafter referred to as “valve without nut”), a “closing member” There is also a type (hereinafter referred to as “valve with nut”) in which a nut (hereinafter referred to as “nut member”) is screwed and screwed into the through part after being inserted into the valve body. To do.

  Generally, in such a “valve with nut”, when attaching or detaching the “closing member”, if one of the “closing member” and the “nut member” is turned with a tool, the other is rotated, This is done while fixing the other side with another tool.

  Then, in the technique of Patent Document 1, when the “closing member” is attached to and detached from the “valve with nut”, a relatively large no-blow work bag must be used from the viewpoint of securing the work space, and in particular, a narrow space. In the case where a “valve with a nut” is arranged in the case, there is a problem that work efficiency is lowered.

  In addition, in the “valve with nut”, when the “nut member” is loosened, a gap is generated not only in the “closing member insertion port” of the valve body but also in the bottom through hole (hereinafter referred to as “closing member through hole”). Therefore, if such work is performed in a state where the combustible gas is circulating, the combustible gas flows out not only from the “closing member insertion port” but also from the “closing member through port”.

That is, in the “valve with nut”, the combustible gas flows out from “two directions” while the “closing member” is being attached and detached. Even if it is wrapped in a bag, there is a risk that flammable gas may flow out. In some cases, the supply of flammable gas must be stopped (the valve on the upstream side of the “valve with nut” must be closed). This causes a situation in which the “closing member” cannot be attached or detached.
By the way, in general, when construction of piping is performed with the supply of flammable gas stopped (valve closed), piping downstream from the valve (for example, the piping is used as a gas consuming appliance such as a gas stove). If it is connected, conduct an airtight test on the pipe to the nearest gas plug) and confirm that there are no abnormalities such as leakage before restarting the supply of flammable gas (opening the valve). ing.
That is, in the case where the “closing member” cannot be attached or detached without closing the valve, if there are 100 households (customers) of flammable gas affected, An explanation to stop the supply of the combustible gas, an air purge after restarting the supply of the combustible gas (including the customer's presence), and the like must be performed. In such a case, when attaching and detaching the “closing member”, additional time and labor are required, which causes a problem of promoting a reduction in work efficiency.

  In addition to the “valve with nut”, the above-described problem is caused by other pipes having penetrating bodies such as “closing members” (for example, pipes through which other fluids circulate, and connections to this). In the case of attaching and detaching the penetrating member in the valves and joints), the same may occur.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a pipe construction jig capable of efficiently performing attachment and detachment work of a penetrating body that penetrates a fluid flow path. The purpose is to provide a pipeline construction method.

  According to the pipework jig according to the present invention, the above-mentioned problem is a pipework jig used in the construction of a pipe having a flow passage through which a fluid flows. A pair of through holes penetrating the flow passage in a direction crossing the flow direction; a through body rotatably inserted into the pipe line in a state where the pair of through holes are respectively closed; and the pipe line An end of the penetrating body that is inserted into the pipe, and a threaded body that can be screwed together, and the pipe construction jig is provided with one through hole in which the threaded body of the pipe is disposed. And a fixing member that presses and fixes the covering member against the conduit, and the covering member contacts at least a part of the screwed body. This is solved by having a rotation restricting portion for restricting the rotation of the screwed body.

  In addition, according to the pipeline construction method of the present invention, the above-described problem is a pipeline construction method for constructing a pipeline having a flow passage through which a fluid flows, the pipeline being crossed with a fluid flow direction. A pair of through-holes penetrating the flow passage in the direction to be closed, a penetrating body penetrating through the pipe line in a state of closing the pair of through-holes, and being inserted into the pipe line A covering member that includes a screwed body that can be screwed with an end of the penetrating body, and covers and seals the one through hole side in which the screwed body of the pipe line is disposed together with the screwed body. A covering member attaching step for attaching to the pipe line, and a penetrating body removing step for removing the penetrating body from the pipe line by releasing the screwed state with the screwed body after performing the covering member attaching step, The covering member is in contact with at least a part of the screwed body. Having a rotation regulating portion for regulating a rotation of the threaded united Te, it is solved by.

  In addition, the “fluid” in the above configuration is meant to include not only combustible gas (for example, city gas and propane gas) and gas such as air but also liquid such as water and oil.

  In addition, the “pipe” provided with the “penetrating body” is a member connected to a pipe body (for example, a gas pipe or a water pipe) provided with a through body penetrating the fluid flow passage. In addition to (for example, valves and joints), when a penetrating body is provided in the pipe body, it means that the pipe body itself is included.

According to the present invention having the above configuration, the attachment and detachment of the penetrating body with respect to the pipeline is
(A) The screwed body fastened to the penetrating body and its periphery (outer surface of the pipe line) are covered with a covering member.
(B) The covering member is pressed and fixed to the pipe line, and the screwed body and its surroundings are sealed.
(C) The penetration body is rotated in the loosening direction (for example, counterclockwise) to release the screwed state with the screwed body.
(D) Remove the penetrating body from “one through hole” of the pipe line (the through hole on the penetrating body insertion side of the pipe line).
(E) Inserting the through body from “one through hole” of the connection member body and screwing it into the screw body;
(F) The through body is rotated in the tightening direction (for example, clockwise) and fastened to the screwed body.
This is done by following these steps.

That is, in the above configuration, with a pipe construction jig attached to the pipe,
-Since the screwed body and its surroundings are sealed by the covering member, even if the fastening state between the through body and the screwed body is released (even if a gap is generated between the through body and the screwed body) , The fluid does not flow out from the “other through hole” side (through hole on the screw attachment side of the pipe line) side,
-Since the rotation of the screwed body is restricted by the rotation restricting portion provided on the covering member, the screwed body does not rotate along with the rotation of the penetrating body in the loosening direction or the tightening direction.

In this regard, the present invention having the above-described configuration is performed on the “other through-hole” side of the pipeline while performing the attaching / detaching operation of the penetrating body with respect to the pipeline.
・ There is no need to take measures to prevent the fluid from flowing out (for example, if the fluid is a flammable gas, cover it with a no-blow work bag)
・ There is no need to perform a measure to prevent the screwed body from rotating (for example, a method of setting a tool such as a wrench on the screwed body).
It can be said that.

  That is, in the above configuration, when attaching and detaching the penetrating body to and from the connecting member main body, it can be completed only by the work on the “one through hole” side of the pipe line, so that the working efficiency is dramatically improved. Is possible.

  In the invention relating to the conduit construction jig, the conduit includes a tubular body and a tubular body connecting member connected to the tubular body, and a pair of the through holes and the through body. It is preferable that the screwed body is provided on the tube connecting member.

  In the invention relating to the pipe construction jig, the covering member may be configured to block the periphery of one of the through holes in the pipe line in a state where the covering member is pressed and fixed to the pipe line by the fixing member. It is preferable to have a sealing member for sealing.

  Furthermore, in the invention relating to the conduit construction jig, the conduit construction jig covers the periphery of the other through-hole of the conduit while being fixed to the conduit. It is preferable that the apparatus further comprises a bag attaching member that is disposed in the position and that can be fitted with a no-blow working bag.

  In the invention relating to the conduit construction jig, the screwed body has a polygonal outer peripheral portion, and the rotation restricting portion is formed in a shape that can be fitted to the outer peripheral portion. Is preferable.

  As described above, according to the jig for pipe construction and the pipe construction method according to the present invention, it is possible to attach and detach the penetrating body to and from the pipe only by work from one direction. Can be improved. In addition, in the case where such a penetration body is attached and detached by the so-called no-blow method, it is particularly effective because the work can be performed more efficiently while effectively preventing the flammable gas from flowing out. It is.

It is a side view which shows an example of the jig for pipe construction concerning this embodiment. It is a disassembled perspective view of a gas stopper. It is a top view of the jig for pipe construction of FIG. FIG. 4 is a cross-sectional view taken along arrow IV-IV in FIG. 1. It is a flowchart for demonstrating the pipeline construction method concerning this embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a side view showing an example of a pipe construction jig according to the present embodiment, FIG. 2 is an exploded perspective view of a gas stopper, FIG. 3 is a plan view of the pipe construction jig of FIG. FIG. 5 is a cross-sectional view taken along the arrow in FIG. 1, and FIG. 5 is a flowchart for explaining the pipeline construction method according to the present embodiment.

  FIG. 1 shows a state in which a gas plug GV is being constructed using a pipe construction jig 1 according to the present embodiment in a pipeline PL having a gas pipe P and a gas plug GV connected thereto. It is a thing. The combustible gas, the gas pipe P, the gas plug GV, and the conduit construction jig 1 are respectively “fluid”, “tubular body”, and “pipe” described in the claims. Corresponding to “Body connection member” and “Jig for pipe construction”.

First, the pipeline PL according to the present embodiment will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, the gas pipe P constituting the pipe line PL is made of a metal pipe member (for example, a so-called white gas pipe), and combustible gas (this embodiment) supplied from a gas supply line serving as a backbone. In the form, it is piping for deriving city gas) to a gas meter (not shown) or the like.

  As shown in FIGS. 1 and 2, the gas plug GV constituting the pipe line PL is mainly made of a metal member (for example, a gun metal), and includes a gas plug main body VB, a closing member VC, a washer member VW, And a nut member VN. The gas plug main body VB, the closing member VC, and the nut member VN correspond to a “connecting member main body”, a “penetrating body”, and a “screwed body” described in the claims, respectively.

  The gas stopper main body VB has a flow passage Bf through which a combustible gas flows, a pair of gas pipe connection ports Bp and Bp, a closing member insertion port Bi, and a closing member through-bore Bo. The flow passage Bf, the closing member insertion port Bi, and the closing member through-bore Bo are respectively defined as “flow passage”, “other through-hole”, and “one through-hole”. It corresponds to “hole”.

  The pair of gas pipe connection ports Bp and Bp are arranged so as to face each other, and both are configured to be connected to the gas pipe P by screw joining.

  The flow passage Bf is a flow path that is disposed between the gas pipe connection ports Bp and Bp and leads the combustible gas supplied from one gas pipe P to the other gas pipe P.

  Each of the closing member insertion port Bi and the closing member through-bore Bo is opened across the flow passage Bf in a direction intersecting with the flow direction of the combustible gas. The closing member insertion port Bi is an opening for inserting the closing member VC, and the closing member penetration port Bo is an opening for allowing the closing member VC inserted through the closing member insertion port Bi to pass therethrough.

  The closing member VC is formed in a substantially cylindrical shape (substantially frustoconical shape), and is formed on a through portion Ch penetrating along a direction crossing the axial direction and on an insertion end portion side to be inserted into the gas plug main body VB. It has a screw part Cb and a tool attachment part Ct for attaching a tool such as a wrench.

The attachment of the closing member VC to the gas plug body VB is as follows:
(A) The threaded portion Cb side of the closing member VC is inserted through the closing member insertion port Bi and protruded from the closing member through port Bo.
(B) The nut member VN is screwed into the screw portion Cb with the washer member VW interposed.
(C) fastening the screw part Cb and the nut member VN;
Is done.
As will be described in detail later, in the present embodiment, the screw portion Cb and the nut member VN are fastened by tightening the closing member VC side with a tool such as a wrench instead of the nut member VN side. .

  By rotating the closing member VC with a tool, the closing member VC can be moved between an open position where the flammable gas is circulated through the penetrating portion Ch and a closed position where the circulation is stopped.

  The nut member VN has a female screw portion that can be screwed with the screw portion Cb of the closing member VC, and an outer peripheral portion Nc thereof is formed in a polygonal shape (“hexagon” in the present embodiment). In addition, the said outer peripheral part Nc corresponds to the "outer peripheral part" as described in a claim.

Next, the conduit construction jig 1 according to the present embodiment will be described with reference to FIGS. 1, 3, and 4.
As shown in FIGS. 1, 3 and 4, the pipework jig 1 includes a covering member 10, a fixing member 20, and a bag attachment member 30. In addition, the said covering member 10, the fixing member 20, and the bag attaching member 30 correspond to the "covering member", the "fixing member", and the "bag attaching member" as described in a claim, respectively. .

  As shown in FIGS. 1, 3, and 4, the covering member 10 is mainly made of a metal member, and includes a main body portion 11, a rotation restricting portion 12, and a lid portion 13. In addition, the said rotation control part 12 corresponds to the "rotation control part" as described in a claim.

  The main body 11 has a substantially cylindrical shape, and a pair of flat surfaces 11 </ b> A and 11 </ b> A are formed on a part of the outer peripheral surface thereof in parallel with each other. As will be described in detail later, connecting plate portions 22 and 22 constituting the fixing member 20 are fixed to the pair of flat surfaces 11A and 11A by screws or the like.

  Further, the main body 11 is formed with a through hole 16 penetrating from the substantially central portion of the upper surface 11B toward the bottom surface 11C. The through-hole 16 has a large-diameter hole portion 16a and a small-diameter hole portion 16b having a smaller diameter than the large-diameter hole portion 16a, and these are arranged in this order from the top surface 11B to the bottom surface 11C.

  In the large-diameter hole portion 16a, an annular groove portion 17 is formed on the circumferential surface of the opening along the circumferential direction. An O-ring 15 made of an elastic member (for example, a rubber member) is fitted into the groove portion 17. The O-ring 15 is disposed so as to protrude from the opening peripheral surface of the large-diameter hole 16a in a state where the O-ring 15 is fitted into the groove 17. The O-ring 15 corresponds to a “seal member” recited in the claims.

  The diameter of the large-diameter hole 16a is slightly larger than the diameter of the outer peripheral surface BoS of the gas stopper main body VB on the closing member through-bore Bo side. In a state where the closing member through-bore Bo side of the gas stopper main body VB is inserted into the large-diameter hole portion 16a, the outer peripheral surface BoS of the gas stopper main body VB is inserted into the O-ring 15 with “airtightness”. It has become.

  On the other hand, the diameter of the small-diameter hole 16b is formed to be approximately the same as the diameter of the rotation restricting portion 12 described later. The rotation restricting portion 12 is fixedly arranged in a state of being fitted in the small diameter hole portion 16b.

The rotation restricting portion 12 is formed in a substantially cylindrical shape, and has a large diameter hole portion 12a and a small diameter hole portion 12b having a smaller diameter than the large diameter hole portion 12a.
The large-diameter hole 12a has a shape that can be fitted to the outer peripheral portion Nc of the nut member VN formed in a polygonal shape (“hexagonal shape” in the present embodiment).

The lid portion 13 has a substantially circular plate shape, and is a member that simultaneously closes the small diameter hole portion 16b formed in the bottom surface 11C of the main body portion 11 and the small diameter hole portion 12b of the rotation restricting portion 12.
The lid portion 13 is fixed to the main body portion 11 and the rotation restricting portion 12 by welding or the like in a state having “airtightness”. Thereby, even if the combustible gas of predetermined pressure flows in from the upper surface 11B side of the covering member 10, it does not flow out (leak) from the bottom surface 11C side.

As will be described in detail later, in a state where the covering member 10 is pressed and fixed to the gas plug GV by the fixing member 20,
-While the nut member VN of the gas plug GV is in contact with the stepped portion between the large-diameter hole 12a and the small-diameter hole 12b of the rotation restricting portion 12, it fits into the large-diameter hole 12a,
The outer peripheral surface BoS of the gas plug GV is in close contact (inscribed) with the inner peripheral surface of the O-ring 15 in a state of having “airtightness”.
It is like that.

Next, the fixing member 20 will be described with reference to FIGS. 1, 3, and 4.
As shown in FIGS. 1, 3, and 4, the fixing member 20 is made of a metal member, and a pair of pressing portions 21, 21 and a pair of left and right connecting plate portions 22, 22 connecting the pressing portions 21, 21. And have. Since the pair of presser portions 21 and 21 have the same configuration, one presser portion 21 will be described below, and the other presser portion 21 will be described unless necessary. Is omitted. Similarly, regarding the pair of connecting plate portions 22 and 22, one connecting plate portion 22 will be described, and the description of the other connecting plate portion 22 will be omitted.

  The holding portion 21 has a substantially U-shaped cross section, is formed by appropriately bending a plate material, and is rotatably connected to one connecting plate portion 22 via a hinge member 23. Since the hinge member 23 has the same configuration as a known hinge (hinge), a detailed description of the hinge member 23 is omitted, but in this embodiment as well, a set of plate members connected via a shaft member. Are configured to be movable relative to each other.

In the present embodiment, a known snap lock 24 for locking to the other connecting plate portion 22 is attached to the bending surface (the other bending surface) on the free end side of the presser portion 21.
Specifically, the connecting plate portion 22 has a hook-shaped receiving portion 24A, and the presser portion 21 has a main body portion 24B having a locking arm that can be locked to the receiving portion 24A. It is attached.

  The connecting plate portion 22 has a substantially rectangular plate shape, the flat surface 11A of the covering member 10 is at the center in the longitudinal direction, and the hinge members 23, 23 of the presser portions 21, 21 at each of both ends thereof. The snap locks 24, 24 are fixed with bolts or the like.

In this embodiment, since the fixing member 20 is configured as described above, each of the snap locks 24, 24 with the nut member VN of the gas stopper GV fitted to the covering member 10 (the rotation restricting portion 12). If you lock
-A pair of presser parts 21 and 21 are closely fixed to gas pipes P and P located on both sides of the gas plug GV, respectively.
The cover member 10 is pressed and fixed to the gas plug GV as the pressers 21 and 21 are fixed to the gas pipes P and P,
It is configured as follows.

Next, the bag attachment member 30 will be described with reference to FIGS. 1, 3, and 4.
As shown in FIGS. 1, 3, and 4, the bag attachment member 30 is made of a metal member, and has a main body portion 30 </ b> A and a flange portion 30 </ b> B.

  The main body 30A has a substantially cylindrical shape, and an annular groove 30a is formed along a circumferential direction at a predetermined position on the inner peripheral surface thereof. An O-ring 35 made of an elastic member (for example, a rubber member) is inserted into the groove 30a. The O-ring 35 is disposed so as to protrude from the inner peripheral surface of the main body 30A while being fitted in the groove 30a.

  The inner diameter of the main body 30A is formed slightly larger than the diameter dimension of the outer peripheral surface BiS on the closing member insertion port Bi side of the gas plug main body VB. In the state where the closing member insertion port Bi side of the gas stopper main body VB is inserted into the main body 30A, the outer peripheral surface BiS of the gas stopper main body VB is mounted in the O-ring 15 in a state of being “airtight”. ing.

  The main body 30 </ b> A is fixed to the fixing member 20 via a pair of support plate parts 51, 51. The support plate portion 51 has a substantially L-shaped cross section, and has one end portion on the outer peripheral surface of the main body portion 30A and the other end portion on the outer surface of the fixing member 20 (holding portion 21) by welding or the like. It is fixed.

  As shown in FIG. 4, the main body 30 </ b> A is inserted into the outer peripheral surface BiS of the gas plug main body VB via the O-ring 15 when the pair of pressers 21, 21 are locked by the snap locks 24, 24. It is like that.

As described above, in the present embodiment, the gas stopper GV is firmly sandwiched between the fixing member 20 and the bag attaching member 30 in a state where the pipe construction jig 1 is fixed to the gas stopper GV and the gas pipe P. It has become.
For this reason, in this embodiment, even if the fastening state of the closing member VC and the nut member VN is released and flammable gas flows out from the closing member through-bore Bo,
The covering member 10 and the bag attaching member 30 are not detached from the gas stopper GV due to the pressure,
-Combustible gas will not flow out from the closing member through-bore Bo side,
It is configured as follows.

As shown in FIGS. 1, 3, and 4, the flange portion 30 </ b> B extends from the one end portion of the main body portion 30 </ b> A so as to protrude in the radial direction.
As will be described in detail later, in this embodiment, a gas plug side insertion portion 42 of a no-blow working bag 40 described later is disposed between the flange portion 30B and the pair of support plate portions 51, 51. Yes. The no-blow work bag 40 corresponds to the “no-blow work bag” recited in the claims.

Here, the no-blow work bag 40 will be described with reference to FIG.
As shown in FIG. 4, the no-blow work bag 40 includes a cylindrical bag body 41, a gas plug side insertion portion 42 attached to the closing member insertion port Bi side of the gas plug GV, and an insertion for inserting the operator's hand. It has a worker side insertion part (not shown) as a mouth.

  The bag body 41 is made of, for example, transparent soft vinyl chloride, and has a size of an outer diameter of 300 mm and a height of 450 mm, for example.

A gas stopper side insertion portion 42 is attached to the lower bottom portion of the bag main body 41 with an adhesive or the like so as to cover a hole formed in the center portion thereof. The gas plug side insertion portion 42 is made of, for example, a circular raw rubber plate having a diameter of 200 mm, and a hole portion 42a having a diameter of about 20 mm to 100 mm is formed at the center thereof (see FIG. 4).
Further, similarly to the lower bottom portion, an operator side insertion portion (not shown) is pasted on the upper bottom portion (not shown) of the bag body 41 with an adhesive or the like so as to cover the hole formed in the center portion thereof. It is worn. Similar to the gas plug side insertion portion 42, the worker side insertion portion is made of, for example, a circular raw rubber plate having a diameter of 200 mm, and a hole portion having a diameter of about 50 mm to 100 mm is formed at the center thereof.

  Next, a construction method (pipe construction method) of the gas plug GV using the pipe construction jig 1 will be described with reference to FIGS. 1 and 3 to 5. In the following description, a case where the closing member VC is “replaced” while the combustible gas is flowing through the gas pipe P will be described as an example. For example, when the removed closing member VC is reattached (for example, Needless to say, this can be done in a similar manner even when the closing member is cleaned and then reattached.

  As shown in FIG. 5, the pipe construction method according to the present embodiment includes a pipe construction jig attachment process A, a no-blow work bag attachment process B, a closing member removal process C, and a temporary plug insertion process D. A closing member attaching step E, a no-blow work bag removing step F, and a pipe construction jig removing step G. The pipe construction jig attaching step A and the closing member removing step C correspond to the “cover member attaching step” and the “penetrating member removing step” described in the claims, respectively. To do.

(Jig installation process A for pipeline construction)
The pipeline construction method according to the present embodiment starts from performing the pipeline construction jig mounting step A.
Specifically, in the pipe construction jig attaching step A, as shown in FIGS. 1, 3 and 4,
(A) First, the rotation restricting portion 12 of the covering member 10 is fitted to the nut member VN of the gas plug GV via the O-ring 15.
(B) Next, in a state where the pair of presser portions 21 and 21 are covered with the gas pipes P and P, the snap locks 24 and 24 are brought into a locked state.
Do the following work.

This
The outer peripheral surface BoS of the gas stopper main body VB (the outer peripheral surface on the closing member through-bore Bo side) and the nut member VN are sealed (covered) in a state of being “airtight” by the covering member 10,
The outer peripheral portion Nc of the nut member VN is fitted to the rotation restricting portion 12 of the covering member 10, and
The bag attachment member 30 is mounted in an “airtight” state on the outer peripheral surface BiS (the outer peripheral surface on the closing member insertion port Bi side) of the gas plug main body VB.
It is like that.
In this embodiment, after performing the pipe construction jig attaching step A as described above, the no-blow work bag attaching step B which is the next step is performed.

(No blow work bag mounting process B)
In the no-blow work bag attachment process B, an operation of attaching the no-blow work bag 40 to the bag attachment member 30 of the pipework jig 1 is performed.
Specifically, in the no-blow work bag attachment step B, the no-blow work bag 40 is attached to the bag attachment member 30 in a state where the gas stopper side insertion part 42 is positioned between the flange part 30B and the pair of support plate parts 51, 51. Do the work to attach to.

  In this embodiment, after performing such a no-blow work bag attachment process B, the closing member removal process C which is the next process is performed. In addition, from the viewpoint of preventing inadvertent outflow of flammable gas to the outside in the state where the no-blow work bag attachment process B has been performed, a tool (for example, a wrench, for example) used in the next process or later in the no-blow work bag 40 ) Or a new closing member VC or the like is preferably stored in advance.

(Closing member removal process C)
In the closing member removing step C, an operation of removing the closing member VC from the gas plug main body VB is performed in the no-blow work bag 40.
Specifically, in the closing member removal step C, a tool is used to rotate the closing member VC in the loosening direction (for example, counterclockwise).

In the present embodiment, the nut member VN is fitted by the covering member 10, and the nut member VN and its surroundings (around the closing member through hole Bo) are hermetically sealed. For,
-Even if the closing member VC is rotated in the loosening direction in the no-blow work bag 40, the nut member VN is not rotated along with this,
-Even if flammable gas flows out from the closing member through-bore Bo, the flammable gas does not flow out to the outside.
It is like that.

Furthermore, in this embodiment,
Since the bag attachment member 30 is attached to the outer peripheral surface BiS of the gas stopper main body VB in a state of having “airtightness”, even if the no-blow work bag 40 is filled with flammable gas, the gas stopper main body VB and the bag Combustible gas does not flow out from between the mounting member 30 and
-Since the bag part 30B is formed in the bag attachment member 30, even if the no-blow work bag 40 moves on the bag attachment member 30 due to the filling (expansion) of combustible gas, the movement is restricted by the collar part 30B. Therefore, there is no possibility that the no-blow work bag 40 will come off during the work.

  In this embodiment, after performing the closing member removal process C as described above, the temporary plug insertion process D, which is the next process, is performed.

(Temporary stopper insertion process D)
In the temporary stopper insertion step D, for example, a gas-impermeable sponge (for example, rubber sponge, not shown) is inserted (mounted) into the closing member insertion opening Bi of the gas stopper main body VB. This is because it is necessary to suppress unnecessary outflow of the flammable gas from the viewpoint of safety until a new closing member VC is attached.
In this embodiment, after performing such a temporary stopper insertion process D, the closing member attachment process E which is the next process is performed.

(Closing member mounting process E)
In the closing member attaching step E, after removing the sponge inserted in the temporary stopper inserting step D, an operation of attaching a new closing member VC to the gas stopper main body VB is performed.
In the present embodiment, the nut member VN remains in the covering member 10 in a state in which the closing member VC is removed in the closing member removing step C. It is only necessary to insert the closing member VC through the closing member insertion port Bi, screw the closing member VC into the nut member VN, and then tighten it with a tool such as a wrench.
In this embodiment, after performing such a closing member attachment process E, the no blow work bag removal process F is performed.

(No blow work bag removal process F)
In the no-blow work bag removal step F, an operation of removing the no-blow work bag 40 attached to the bag attachment member 30 is performed.
In the present embodiment, after performing such a no-blow work bag removal step F, a pipe construction jig removal step G, which is the next step, is performed.

(Jig removal process for pipeline construction G)
In the pipe construction jig removing process G, the snap locks 24, 24 that have been locked are brought into an unlocked state, and the pipe construction jig 1 is removed from the gas pipe P and the gas plug GV. To do.
The main pipe construction method is completed by performing such a pipe construction jig removing process G.

As described above, in the present embodiment, the pipe construction jig 1 is attached to the gas stopper GV,
-Since the nut member VN and its surroundings are sealed by the covering member 10, even if the fastening state between the closing member VC and the nut member VN is released (a gap is generated between the closing member VC and the nut member VN). ), No flammable gas flows out from the closing member through-bore Bo side,
-Since the rotation of the nut member VN is restricted by the rotation restricting portion 12 provided in the covering member 10, even if the closing member VC is turned in the loosening direction, the nut member VN is not rotated. ,
It is configured as follows.

In this respect, the present embodiment is configured so that the closing member VC on the gas stopper main body VB side is attached and detached while the closing member VC is attached to and detached from the gas stopper main body VB.
-There is no need to perform a treatment for suppressing the outflow of combustible gas (for example, a treatment for covering the closing member through-bore Bo side with a no-blow work bag), and
-It is not necessary to perform a measure for preventing the rotation of the nut member VN (for example, a measure for setting a tool such as a wrench on the nut member VN).
It can be said that.

  That is, in this embodiment, when attaching and detaching the nut member VN, not only can the operation be performed without stopping the supply of the combustible gas, but also only the operation on the closing member insertion port Bi side of the gas plug main body VB. Since it can be completed, work efficiency can be improved dramatically.

Further, in the present embodiment, since the gas plug GV is firmly sandwiched between the fixing member 20 and the bag mounting member 30 in a state where the pipe construction jig 1 is mounted on the gas plug GV, the closure is closed. Even if the fastening state between the member VC and the nut member VN is released and the combustible gas flows out from the closing member through-bore Bo,
-Not only can the covering member 10 and the bag mounting member 30 be prevented from being detached from the gas plug GV by the pressure,
-It is possible to more reliably prevent the combustible gas from flowing out from the closing member through-bore Bo side.

Furthermore, in this embodiment,
-Since the bag attachment member 30 is attached to the outer peripheral surface BiS side of the gas stopper main body VB in a state of having "airtightness", even if the no-blow work bag 40 is filled with flammable gas, Combustible gas does not flow out from between the bag mounting member 30 and
-Since the bag part 30B is formed in the bag attachment member 30, even if the no-blow work bag 40 moves on the bag attachment member 30 due to the filling (expansion) of combustible gas, the movement is restricted by the collar part 30B. Therefore, there is no possibility that the no-blow work bag 40 will come off during the work.

  In the present embodiment, the gas plug GV having the closing member VC has been described as an example. However, the present invention is not limited to this, and a flow passage (corresponding to “flow passage Bf” in the present embodiment) is provided. As long as the penetrating penetrating body (corresponding to the “closing member VC” in this embodiment) is fixed by bolt / nut coupling, it can be applied to other valves and joints. In the case where such a penetrating body is directly provided in a pipe body (corresponding to “gas pipe P” in the present embodiment), the present invention can also be applied to the pipe body.

  In the present embodiment, the gas pipe P through which the flammable gas flows is described as an example. However, the present invention is not limited to this, and other fluids (for example, gas such as air or toxic gas, and the like) It is also possible to apply to a pipe body through which a liquid such as water and oil flows.

  Furthermore, in this embodiment, although the thing provided with the bag attachment member 30 for attaching the no-blow work bag 40 to the jig 1 for pipe construction was illustrated, this is also omissible. In this case, the no-blow work bag 40 may be attached to the closing member insertion port Bi of the gas plug GV.

  As mentioned above, although embodiment which applied the invention made by this inventor was described, this invention is not limited by the description and drawing which make a part of indication of this invention by this embodiment. That is, it is added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Pipeline construction jig | tool 10 Cover member 11 Main body part 11A Flat surface 11B Upper surface 11C Bottom surface 12 Rotation restricting part 12a Large diameter hole part 12b Small diameter hole part 13 Cover body part 15 O-ring 16 Through hole 16a Large diameter hole part 16b Small diameter Hole portion 17 Groove portion 20 Fixing member 21 Holding portion 22 Connecting plate portion 23 Hinge member 24 Snap lock 24A Receiving portion 24B Body portion 30 Bag attachment member 30A Body portion 30a Groove portion 30B Gutter portion 35 O-ring 40 No-blow work bag 41 Bag body 42 Gas Plug side insertion portion 42a Hole 51 Support plate portion PL Pipe P Gas pipe GV Gas plug VB Gas plug body Bf Flow passage Bp Gas pipe connection port Bi Closing member insertion port BiS Outer peripheral surface Bo Closing member through-bore BoS Outer peripheral surface VC Closed Member Ch Through part Cb Thread part Ct Tool mounting part VW Washer member VN Nut member Nc Outer peripheral part

Claims (6)

A pipe construction jig used for the construction of a pipe having a flow passage through which fluid flows,
The pipeline is
A pair of through holes penetrating the fluid passage in a direction intersecting with the fluid flow direction,
A penetrating body that is rotatably inserted into the pipe line in a state in which the pair of through holes are respectively closed;
A screwed body that can be screwed with an end of the penetrating body that is inserted through the pipe line,
The pipe construction jig is
A covering member that covers and seals the one through-hole side where the screwed body of the pipe line is disposed together with the screwed body;
A fixing member that presses and fixes the covering member to the pipe line,
The covering member is
A rotation restricting portion that abuts at least a part of the screwed body and restricts the rotation of the screwed body;
Jig for pipe construction. The conduit has a tubular body and a tubular body connecting member connected to the tubular body,
The pipe construction jig according to claim 1, wherein the pair of through holes, the through body, and the screwed body are provided in the pipe body connecting member.   The said covering member has a sealing member which seals so that the circumference | surroundings of one said through hole of the said pipe lines may be plugged up in the state pressed and fixed to the said pipe line by the said fixing member. Or the jig for pipe construction of Claim 2.   The pipe construction jig is arranged so as to cover the periphery of the other through hole of the pipe in a state of being fixed to the pipe, and can be fitted with a no-blow working bag The jig for pipe construction according to any one of claims 1 to 3, further comprising an attachment member. The screwed body has an outer peripheral portion formed in a polygonal shape,
The jig for pipe construction according to any one of claims 1 to 4, wherein the rotation restricting portion is formed in a shape that can be fitted to the outer peripheral portion. A pipeline construction method for constructing a pipeline having a flow passage through which fluid flows,
The pipeline is
A pair of through holes penetrating the fluid passage in a direction intersecting with the fluid flow direction,
A penetrating body that pivotally penetrates the pipe line in a state where each of the pair of through holes is closed;
A screwed body that can be screwed with an end of the penetrating body that is inserted through the pipe line,
A covering member attaching step for attaching a covering member that covers and seals the one through-hole side of the conduit where the threaded body is disposed together with the threaded body, to the conduit;
A penetrating body removing step of removing the penetrating body from the pipe line by releasing the screwed state with the screwed body after performing the covering member attaching step;
The covering member is
A rotation restricting portion that abuts at least a part of the screwed body and restricts the rotation of the screwed body;
Pipeline construction method characterized by that.