CN112424512B

CN112424512B - Connection structure of conduction port and piping end, opening and closing valve device, and removal jig

Info

Publication number: CN112424512B
Application number: CN201980047229.1A
Authority: CN
Inventors: 冈田慎司; 高田幸治; 西村康雄; 高根沢敏
Original assignee: Toagosei Co Ltd; Neriki Valve Co Ltd
Current assignee: Toagosei Co Ltd; Neriki Valve Co Ltd
Priority date: 2018-08-10
Filing date: 2019-07-23
Publication date: 2023-01-10
Anticipated expiration: 2039-07-23
Also published as: JP7154495B2; JP2020026850A; KR20210020116A; TW202009413A; CN112424512A; WO2020031683A1; KR102507067B1; TWI815942B

Abstract

The invention aims to provide a connecting structure of a guide opening and a pipe end part of a sealing component which can be arranged at a proper position easily replaced under the connecting state of the guide opening and the pipe end part, an opening and closing valve device and a disassembling clamp. In a connection structure X of a conduit 12 as one end of a flow path pipe 100 for conducting gas and a pipe end 102 of the flow path pipe 100 for conducting gas in a container valve device 1 having an opening/closing valve for switching opening/closing at a middle portion of a flow path 14 for conducting gas, the conduit 12 and the pipe end 102 are arranged in a butted state, an annular packing 20 is arranged between the conduit 12 and the pipe end 102, the packing 20 has an opening 21 having a diameter equal to or larger than the diameter of the flow path 14, an attachment groove 122 for attaching the packing 20 so that a part thereof protrudes toward a front end side F is formed in the conduit 12, and a tapered space 123 into which a side protruding portion 203a of a removal jig 200 can be inserted is provided on a main body side B of the conduit 12.

Description

Connection structure of conduction port and piping end, opening and closing valve device, and removal jig

Technical Field

The present invention relates to a connection structure between a conduit at one end of a gas flow path and a pipe end of a flow path pipe through which a fluid flows, in an opening/closing valve device having an opening/closing valve for switching opening/closing in a middle portion of the flow path through which the gas flows, for example, and relates to the opening/closing valve device and a removal jig for removing a seal member attached to the opening/closing valve device.

Background

Generally, an opening/closing valve device that switches between an open state and a sealed state is provided, and a fluid such as gas is conducted by connecting a conduction port, which is one end of a flow path, to a pipe end of a flow path pipe. At this time, as shown in patent document 1, an annular seal member (packing) is disposed between the conduction port and the pipe end portion to prevent gas from leaking from a joint portion between the conduction port and the pipe end portion.

Since such a seal member is mounted in a pressurized state to obtain high sealing performance, it may be deteriorated by use, and the sealing performance may be lowered. The sealing member having such a reduced sealing property is replaced by disconnecting the connection between the conduction port and the pipe end. In particular, when the gas to be conducted is a highly corrosive gas or the like, which is highly dangerous due to leakage, the seal member needs to be replaced every time the gas is used.

However, as shown in patent document 1, when the seal member is attached to the attachment groove (step portion), the seal member can be disposed at an appropriate position as compared with the case where the seal member is disposed only at the joint portion, but it is difficult to detach the seal member in the attached state from the attachment groove, and the replaceability of the seal member is low.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2003-74798

Disclosure of Invention

Therefore, an object of the present invention is to provide a connection structure between a conduction port and a pipe end portion of a seal member which can be placed at an appropriate position, and which can be easily replaced, an opening/closing valve device, and a removal jig in a connected state between the conduction port and the pipe end portion.

The present invention provides a connection structure of a conduit end of a conduit pipe, which is a conduit port at one end of a fluid conducting flow path in an opening and closing valve device having a switching opening and closing at an intermediate portion of the flow path conducting the fluid, wherein the conduit port is arranged in abutment with the conduit end, and an annular sealing member having an opening is arranged between the conduit port and the conduit end, an installation groove for installing the sealing member is formed in one of the conduit port and the conduit end, and an insertion space into which an insertion convex portion of a removal jig can be inserted is provided on a back surface side which is an opposite side to the other of the conduit port and the conduit end in an installation state in which the sealing member is installed in the installation groove.

The fluid may be a gas, a liquid, or a gel, or may be a fluid having a high risk of leakage of a highly corrosive gas or the like.

The sealing member is a member having sealing properties and elasticity, such as an O-ring, a rubber gasket, or a metal gasket, and is also called a gasket, for example.

The opening/closing valve device may be a container valve device that is attached to a container such as a gas bomb to restrict the entry and exit of the fluid, or a pipe valve device that is attached between the passage pipes to restrict the conduction of the fluid flowing through the passage pipes.

The direction of conduction of the fluid to be conducted may be a one-way direction from one of the flow path of the opening/closing valve device having the conduction port at one end and the flow path pipe having the pipe end to the other, or may be a two-way direction in which the direction of conduction changes depending on the purpose of conduction, such as filling and discharging.

The mounting groove formed in at least one of the introduction port and the pipe end portion may be a mounting groove formed in the introduction port, a mounting groove formed in the pipe end portion, or a mounting groove formed in both the introduction port and the pipe end portion.

The mounting groove formed in both the conduction port and the pipe end may be formed by fitting a seal member to one of mounting grooves formed in the same shape and fitting the seal member in the other mounting groove in a connected state, or may be formed by fitting the seal member in the other sub-mounting groove in a connected state with the one mounting groove as a main mounting groove.

In the above-described state in which the seal member is mounted in the mounting groove, the insertion space into which the insertion convex portion of the removal jig can be inserted may be formed so that the space on the inner diameter side of the recess having a substantially stepped cross section is continuous in the circumferential direction with respect to the mounting groove in which the seal member is mounted, and may be formed in a part of the circumferential direction or in a plurality of places, on the back surface side opposite to the side facing the other of the conduction port and the pipe end portion.

According to the present invention, the sealing member which can be disposed at an appropriate position in a state where the conduction port and the pipe end are connected to each other can be easily removed and replaced.

In detail, in a connection structure in which a conduit, which is one end of a fluid-conducting flow path, is abutted against a pipe end of a flow path pipe in which the fluid is conducted in an opening/closing valve device having an opening/closing valve for switching opening/closing in an intermediate portion of the flow path in which the fluid is conducted, a seal member disposed between the conduit and the pipe end is attached to an attachment groove formed in one of the conduit and the pipe end, whereby the seal member can be reliably disposed at an appropriate position.

In addition, in the state where the sealing member is mounted in the mounting groove, by providing an insertion space on the back surface side opposite to the other of the conduction port and the piping end portion, inserting the insertion convex portion of the removal jig into the insertion space, and applying a force to the sealing member mounted in the mounting groove from the back surface side toward the opposite side, the sealing member mounted in the mounting groove can be easily removed and replaced. Therefore, even when the seal member needs to be replaced every time the seal member is used, for example, by conducting a corrosive gas, the seal member can be replaced easily and efficiently, and the seal member can be used safely.

In an aspect of the present invention, the mounting groove and the insertion space may be formed in the conduction opening.

According to the present invention, the replaceability of the seal member can be improved.

Specifically, compared to the case where the mounting groove and the insertion space are provided at the pipe end of the fixed flow path pipe, the sealing member mounted in the mounting groove can be easily removed by providing the mounting groove and the insertion space in the conduction port of the opening/closing valve device which is easily removed and moved, and therefore, the replaceability of the sealing member can be improved.

In an aspect of the present invention, the mounting groove may have a contact surface that contacts the seal member with a predetermined pressure receiving area, and the insertion space may be formed to a depth at which the insertion convex portion of the removal jig can be inserted with a predetermined insertion depth, and the removal jig may include: the insertion space includes an insertion convex portion to be inserted into the insertion space, an abutting portion to abut against an opening edge forming the opening, and a force point portion to input a force acting in a detaching direction of the insertion convex portion with the abutting portion as a fulcrum.

According to the present invention, in the state where the conduction port is connected to the end of the pipe, the sealing member mounted in the mounting groove can be reliably sealed, and the sealing member mounted in the mounting groove can be removed by the removal jig.

In detail, since the mounting groove has a contact surface that contacts the seal member with a predetermined pressure receiving area, the seal member can be pressed without causing undesired deformation in the connected state, and the seal can be reliably performed.

Further, the insertion space is formed at a depth at which the insertion convex portion of the removal jig can be inserted at a predetermined insertion depth, and the removal jig includes: the insertion convex portion inserted into the insertion space, the abutting portion abutting against the opening edge forming the opening, and the force point portion inputting a force acting in the removal direction of the insertion convex portion with the abutting portion as a fulcrum, so that the insertion convex portion is inserted into the insertion space at a predetermined insertion depth, the abutting portion abuts against the opening edge forming the opening, and the force acting in the direction of removing the insertion convex portion with the abutting portion as a fulcrum is applied by the force point portion, whereby the seal member can be easily removed and replaced from the mounting groove.

In an aspect of the present invention, the insertion space may be provided radially inward of the mounting groove to which the seal member is mounted and on the back surface side.

According to the present invention, the insertion space having a small influence on the fluid to be conducted can be formed with a simple structure.

The opening/closing valve device of the present invention is characterized in that an opening/closing valve for switching opening/closing is provided in a middle portion of a passage through which a fluid is conducted, one end of the passage is a conduction port to which a pipe end portion of a passage pipe through which the fluid is conducted is butted and connected, an attachment groove to which an annular seal member having an opening is attached is provided in the conduction port, and an insertion space into which an insertion convex portion of a removal jig can be inserted is provided on a back surface side opposite to a side opposite to the pipe end portion in an attached state in which the seal member is attached to the attachment groove.

According to the present invention, the opening/closing valve for switching the opening/closing is provided in the middle portion of the passage through which the fluid is conducted, and the seal member is attached to the attachment groove provided in the conduction port to which the pipe end of the passage pipe through which the fluid is conducted is connected, whereby the seal member can be disposed at an appropriate position in the connected state of the conduction port and the pipe end.

In addition, in the state where the seal member is mounted in the mounting groove, the insertion space is provided on the back surface side opposite to the pipe end, the insertion convex portion of the removal jig is inserted into the insertion space, and the seal member mounted in the mounting groove is biased from the back surface side to the opposite side, whereby the seal member mounted in the mounting groove can be easily removed and replaced. Therefore, even when the seal member is replaced every time the seal member is used by introducing a corrosive gas, the seal member can be replaced easily and efficiently, and the seal member can be used safely.

Further, the present invention is characterized in that the removal jig includes: an insertion projection portion that is disposed in a state in which a conduction port, which is one end of a flow path pipe that conducts a fluid, is butted against a pipe end portion of the flow path pipe that conducts the fluid in an opening/closing valve device that has an opening/closing valve that switches opening/closing at an intermediate portion of the flow path that conducts the fluid, and an annular seal member having an opening is attached to an attachment groove formed in at least one of the conduction port and the pipe end portion between the conduction port and the pipe end portion, the insertion projection portion being inserted into an insertion space provided on a rear surface side, which is an opposite side to a side opposite to the other of the conduction port and the pipe end portion; an abutting portion abutting against an opening edge forming the opening; and a force point section for inputting a force that acts on the insertion projection section in the removal direction with the contact section as a fulcrum.

According to the present invention, the seal member can be easily removed and replaced by a removal jig, and the seal member is attached so as to be disposed at an appropriate position in a connected state of the conduction port and the pipe end portion.

Specifically, in a connection structure in which a conduction port as one end of a flow path in which a fluid is conducted is provided in an intermediate portion of the flow path, and a pipe end of a flow path pipe in which the fluid is conducted is butted against, in a connection structure in which a conduction port as one end of the flow path is provided with an on-off valve that switches opening and closing, a seal member disposed between the conduction port and the pipe end is mounted in a mounting groove formed in one of the conduction port and the pipe end, whereby the seal member can be disposed at an appropriate position, and on the other hand, an insertion convex portion of a removal jig is inserted into an insertion space provided on a back surface side that is an opposite side to the other of the conduction port and the pipe end, and the abutting portion is abutted against an opening edge in which the opening is formed, and a force that acts on the insertion convex portion in a removal direction with the abutting portion as a fulcrum is input by a force point portion, whereby the seal member can be easily removed and replaced from the mounting groove. Therefore, even when the seal member needs to be replaced every time the seal member is used, for example, by conducting a corrosive gas, the seal member can be replaced easily and efficiently, and the seal member can be used safely.

According to the present invention, it is possible to provide a connection structure between a conduction port and a pipe end portion of a seal member which can be easily replaced and which can be disposed at an appropriate position in a state where the conduction port and the pipe end portion are connected, an opening/closing valve device, and a removal jig.

Drawings

Fig. 1 is a partially sectional schematic front view of a connection structure between a container valve device and a flow path pipe.

Fig. 2 is a partially sectional schematic explanatory view of a connection structure between the container valve device and the flow path pipe.

Fig. 3 is a partially sectional schematic front view of a connection structure between the container valve device and the flow path pipe.

Fig. 4 is a partially sectional schematic front view of a connection structure between the container valve device and the flow path pipe.

Fig. 5 is a partially sectional schematic perspective view of a connection structure between the container valve device and the flow path pipe.

Fig. 6 is a perspective view of the disassembly jig.

Fig. 7 is a partially sectional schematic front view showing a state where a packing attached to a conduction port of a container valve device is removed by a removal jig.

Fig. 8 is a partially sectional schematic front view of a connection structure between the piping valve device and the flow path piping.

Fig. 9 is a partially sectional schematic explanatory view of a connection structure between the piping valve device and the flow path piping.

Fig. 10 is a partially sectional schematic front view of a connection structure between the piping valve device and the passage piping.

Fig. 11 is a partially sectional schematic front view of a connection structure between a piping valve device and a flow path piping.

Fig. 12 is a partially sectional schematic front view of a state where a gasket attached to a conduction port of the piping valve device is detached by a detachment jig.

Fig. 13 is a partially sectional schematic explanatory view of a connection structure between a conduction port and a flow path pipe according to another embodiment.

Fig. 14 is a partially sectional schematic front view showing a state where a gasket attached to a conduction port according to another embodiment is detached by a detachment jig.

Detailed Description

With reference to fig. 1 to 7, a connection structure X between the container valve device 1 and the flow path pipe 100 and removal of the packing 20 attached to the attachment groove 122, which are one embodiment of the present invention, will be described.

Fig. 1, 3, and 4 are partially sectional schematic front views showing a connection structure X between the tank valve device 1 and the flow path pipe 100, and fig. 2 is a partially sectional schematic explanatory view showing the connection structure X between the introduction port 12 of the tank valve device 1 and the flow path pipe 100. Fig. 5 is a partially sectional schematic perspective view showing a connection structure X of the introduction port 12 and the flow path pipe 100 of the container valve device 1, and fig. 6 is a perspective view showing the removal jig 200. Fig. 7 is a schematic front view, partially in section, showing a state where the packing 20 attached to the conduction port 12 of the container valve device 1 is removed by the removal jig 200.

Fig. 1 is a partially sectional schematic front view of the connection structure X in an exploded state, fig. 3 is a partially sectional schematic front view of the connection structure X in a state where the packing 20 is attached to the conduction port 12 of the container valve device 1, and fig. 4 is a partially sectional schematic front view of the connection structure X in a connected state. In fig. 1, 3 and 4, a portion of the introduction port 12 of the container valve device 1, the packing 20 and the flow path piping 100 are shown in a longitudinal sectional view.

Fig. 2 (a) is a partially sectional schematic perspective view showing a state before the packing 20 is attached to the conduction port 12 of the container valve device 1. Fig. 2 (b) is a partially sectional schematic perspective view of the connection structure X in a state where the packing 20 is attached to the conduction port 12 of the container valve device 1, and fig. 5 is a partially sectional schematic perspective view of the connection structure X in a connected state.

In fig. 2 and 5, perspective views are shown as viewed from the front, left side and plane of the introduction port 12, the packing 20 and the flow path pipe 100, but the left side is shown as a cut-away portion of the front side of the annular introduction port 12, the packing 20 and the flow path pipe 100.

Fig. 7, which is a partially sectional schematic front view showing a state where the packing 20 attached to the introduction port 12 of the vessel valve device 1 is detached by the detachment jig 200, shows a longitudinal sectional view of the introduction port 12 and the packing 20 of the vessel valve device 1.

The vessel valve device 1 is an on-off valve device that is attached to an upper portion of a gas cylinder vessel, not shown, and is connected to a flow path pipe 100 for supplying or filling gas to restrict gas flow.

The container valve device 1 includes: a main body 10 having a substantially cylindrical shape and being long in length, and a rotary handle 11 provided at an upper portion of the main body 10 and configured to rotate an opening/closing valve (not shown) provided inside the main body 10.

Specifically, the main body 10, which is substantially cylindrical and vertically long, has an introduction port 12 protruding laterally near the middle section, and a cylinder attachment portion 13 that is screwed to an attachment portion (not shown) on the upper portion of the cylinder container at the lower portion.

Further, a flow path 14 for communicating the tip end of the introduction port 12 with the lower end of the cylinder attachment portion 13 is provided inside the main body 10. Although not shown, a valve chamber is provided in the middle of the flow path 14 in the main body 10, and the valve chamber accommodates a shut-off valve that is opened and closed by the rotation of the rotary handle 11.

The conduction port 12 protruding laterally near the middle of the main body 10 is substantially cylindrical having a horizontal flow path 14 in the center in the left side view, and has a screw portion 121 to which a cap nut 103 attached to the flow path pipe 100 is screwed.

Further, a mounting groove 122 having a circular concave shape as viewed from the left side is provided on the left side surface of the substantially cylindrical conduction port 12, to which the packing 20 is mounted. A tapered space 123 is provided on the left side surface of the conduction port 12, and the tapered space 123 has a truncated cone shape whose tip is narrowed toward the main body 10 (hereinafter referred to as main body side B) from a position radially inward at a predetermined interval from the outer peripheral edge of the mounting groove 122 to the end of the flow path 14.

A seal groove 125 having a triangular cross section is provided on the outer diameter side of tapered space 123 on groove bottom surface 124 of a predetermined interval from the outer edge of mounting groove 122 to tapered space 123.

The mounting groove 122 thus configured is formed to have an outer diameter substantially equal to the outer diameter of the packing 20 and a depth of about half the thickness of the packing 20. An inner circumferential convex portion 126 (see an enlarged view of a portion a of fig. 1) is provided on an inner surface of the conduction port 12 in which the mounting groove 122 is formed, the inner circumferential convex portion being in close contact with an outer circumferential surface of the packing 20 mounted in the mounting groove 122.

Further, in the tank valve device 1 configured as described above, a residual pressure holding mechanism, a reverse flow prevention mechanism, a pressure reducing mechanism, a pressure gauge, a safety valve, and the like may be appropriately provided according to specifications.

In the connection structure X, the packing 20 disposed between the pipe end 102 of the flow passage pipe 100 and the introduction port 12 has an outer diameter smaller than the outer diameter of the introduction port 12 by one turn, and is a side-view annular packing having an opening 21 at the center in a side view and attached to the attachment groove 122. The packing 20 is made of an appropriate material such as a rubber gasket or a metal gasket that can exhibit sealing properties and elasticity in the connection structure X in which the conduction port 12 and the flow path pipe 100 are joined.

The opening 21 is formed to have a diameter equal to or larger than the diameter of the flow path 14 and smaller than the distal end side F (the side opposite to the main body side B) of the tapered space 123.

The flow path pipe 100 connected to the introduction port 12 via the packing 20 and constituting the connection structure X is a pipe having a introduction space 101 therein, and although not shown, is disposed appropriately with one end thereof being a pipe end 102 connected to the introduction port 12 of the container valve device 1. The end of the flow path pipe 100 opposite to the pipe end 102 is connected to an appropriate device, tank, or the like.

A pipe end 102 constituting one end of the flow path pipe 100 is formed in a flange shape by expanding the diameter to substantially the same diameter as the introduction port 12, and a sealing groove having a triangular cross section, not shown, is provided on a side surface 102a of the pipe end 102 on the side of the vessel valve device 1.

The cap nut 103 is attached to the flow passage pipe 100 so as to be movable in the longitudinal direction. The cap nut 103, which is attached to the flow path pipe 100 so as to be movable in the longitudinal direction, restricts movement toward the container valve device 1 by the pipe end 102. A screw portion 104 that is screwed with the screw portion 121 of the conduction port 12 is formed on the inner surface of the cap nut 103.

Next, a method of forming the connection structure X by connecting the introduction port 12 of the container valve device 1 and the pipe end 102 of the flow path pipe 100 via the packing 20 will be described.

First, as shown in fig. 2 and 3, the packing 20 is mounted in the mounting groove 122 of the conduction port 12. At this time, the packing 20 press-fitted into the mounting groove 122 having a depth smaller than the thickness of the packing 20 is fitted so as to protrude toward the distal end side F of the introduction port 12 (the side opposite to the main body side B on the side of the flow path pipe 100).

At this time, as shown in the enlarged view of the portion a in fig. 3, the inner circumferential convex portion 126 provided on the inner surface of the conduction port 12 forming the mounting groove 122 is brought into close contact with the outer circumferential surface of the packing 20 mounted in the mounting groove 122 so as to be pressed radially inward. Therefore, the packing 20 can be prevented from being accidentally dropped from the mounting groove 122.

The container valve device 1 and the flow path pipe 100 are thus provided in such a manner that the introduction port 12 in which the packing 20 is mounted in the mounting groove 122 is opposed to the pipe end (see fig. 2 (b) and 3). The screw portion 104 of the cap nut 103 is screwed into the screw portion 121 of the introduction port 12, and the introduction port 12 and the flow path pipe 100 are coupled to each other.

Further, the cap nut 103 and the introduction port 12 are screwed, and the packing 20 is sandwiched between the groove bottom surface 124 of the introduction port 12 and the side surface 102a of the pipe end 102. In addition, the cap nut 103 and the conduction opening 12 are fastened to such an extent that the packing 20 is fitted into the seal groove 125 provided in the groove bottom surface 124 and the seal groove provided in the side surface 102 a. By fastening the cap nut 103 and the conduction port 12 in this manner, the connection between the conduction port 12 disposed in abutment with the spacer 20 and the passage pipe 100 is completed, and the connection structure X is configured.

In the connection structure X including the conduction port 12 and the flow path pipe 100 connected in this manner, the packing 20 mounted in the mounting groove 122 can be disposed at an appropriate position between the conduction port 12 and the flow path pipe 100. As shown in the enlarged view of a portion in fig. 3, the inner circumferential convex portion 126 provided on the inner surface of the conduction port 12 forming the mounting groove 122 is in close contact with the outer circumferential surface of the packing 20 mounted in the mounting groove 122 so as to be pressed radially inward. Therefore, the spacer 20 does not fall off from the mounting groove 122 accidentally, and the spacer 20 can be more reliably disposed at an appropriate position in the connection structure X.

Further, since the gasket 20 attached so as to protrude toward the distal end side F from the conduction opening 12 is sandwiched between the groove bottom surface 124 and the side surface 102a and is fastened to be fitted into each seal groove, the connection structure X having high sealability can be configured. Therefore, even if a highly corrosive gas or the like is conducted, the gas does not leak out, and can be safely used.

Thus, although the connection structure X achieves high sealability, as described above, the gasket 20 is sandwiched by the groove bottom surface 124 and the side surface 102a and is fastened to be fitted into each seal groove, and if deteriorated by use, needs to be replaced. Next, a disassembling jig 200 for disassembling the packing 20 mounted in the mounting groove 122 and a method of disassembling the packing 20 using the disassembling jig 200 will be described.

As shown in fig. 6, the removal jig 200 includes: a cylindrical grip portion 201 to be gripped by a replacement worker, a column portion 202 projecting upward from the grip portion 201, and side projecting portions 203 (203 a, 203 b) projecting from the upper end of the column portion 202 to both sides. Therefore, the removal jig 200 has a substantially T-shaped front view symmetrical with the pillar portion 202 and the side protruding portion 203.

The pillar portion 202 is substantially cylindrical with an upper portion thereof reduced in diameter from the root portion, and has lateral protruding portions 203 protruding in both lateral directions, and is formed so as to be continuous in a curved shape from the upper end of the pillar portion 202, which is slightly curved in an upward convex shape, toward the lateral sides.

Therefore, the side protruding portion 203 on one side (for example, the side protruding portion 203 a), the pillar portion 202, and the side protruding portion 203 on the other side (for example, the side protruding portion 203 b) constitute a curved surface that curves upward. The side protruding portion 203 is formed in a shape in which the thickness thereof becomes gradually thinner in the protruding direction and the thickness thereof becomes insertable between the packing 20 mounted in the mounting groove 122 and the tapered space 123.

The length in the depth direction (the direction connecting the lower right and upper left in fig. 6) of the side protruding portion 203 protruding in both sides and forming a substantially T-shape with the pillar portion 202 is formed to be the same as the length of the diameter-reduced portion of the pillar portion 202. Therefore, the side surface of the lateral protruding portion 203 in the depth direction and the pillar portion 202 in the depth direction do not protrude, and have a uniform shape.

The distance between the end portions of the side protruding portions 203 protruding in both sides (the length connecting the upper right end portion and the lower left end portion in fig. 6) is formed longer than the diameter of the opening 21 of the pad 20. Further, the diameter of the reduced diameter portion of the substantially cylindrical pillar portion 202 whose upper portion is reduced in diameter from the root portion is formed smaller than the diameter of the opening 21 of the gasket 20. Therefore, the length of the lateral protruding portion 203 in the depth direction, which is formed to have the same length as the diameter-reduced portion of the pillar portion 202, is also formed to be shorter than the diameter of the opening 21 of the pad 20.

The packing 20 mounted in the mounting groove 122 is detached using the detachment jig 200 having the above-described structure, first, the detachment jig 200 is inclined with respect to the conduction opening 12. Then, one of the side protruding portions 203 protruding in both sides from the column portion 202 of the removal jig 200 is inserted into the main body side B from the opening 21 of the pad 20. The side protruding portion 203a is inserted therein. Since the lateral protruding portion 203a and the lateral protruding portion 203b are formed in a symmetrical shape, the lateral protruding portion 203b may be inserted.

At this time, the distal end of the lateral projecting portion 203a is inserted into the tapered space 123 on the main body side B of the pad 20, and the other lateral projecting portion 203B is brought into contact with a corner portion on the distal end side F of the opening edge of the pad 20 where the opening 21 is formed (see fig. 7).

In this state, by moving the grip 201 in the direction of arrow m (see fig. 7), the force input from the grip 201 acts on the side protruding portion 203a as a force on the distal end side F by the principle of leverage with the side protruding portion 203b contacting the corner of the opening edge of the opening 21 as a fulcrum.

Therefore, the lateral protruding portion 203a inserted into the tapered space 123 causes the force on the distal end side F to act on the pad 20 on the distal end side F of the lateral protruding portion 203a. Therefore, the spacer 20, which is acted by the force on the distal end side F, is pushed out by the side protruding portion 203a, so that the spacer 20 can be detached from the mounting groove 122.

In this way, the connection structure X is a structure in which the conduction port 12, which is one end of the flow path 14, and the pipe end 102 of the flow path pipe 100, which conducts gas, are connected to the container valve device 1 having the on-off valve for switching the opening and closing of the middle portion of the flow path 14, which conducts gas. In the connection structure X, the conduction port 12 is disposed in abutment with the pipe end 102, and an annular packing 20 having an opening 21 with a diameter equal to or larger than the diameter of the flow path 14 is disposed between the conduction port 12 and the pipe end 102. A mounting groove 122 for mounting the gasket 20 is formed in the conduction port 12 so that a part thereof protrudes toward the tip side F. Further, a tapered space 123 into which the lateral protruding portion 203a of the removal jig 200 can be inserted is provided on the main body side B in the attached state in which the spacer 20 is attached to the attachment groove 122. Thus, the packing 20 can be disposed at an appropriate position in a state where the conduction port 12 and the pipe end 102 are connected, and the packing 20 attached to the attachment groove 122 can be easily removed and replaced.

Specifically, in the connection structure X, the packing 20 disposed between the conduction port 12 and the pipe end portion 102 is mounted in the mounting groove 122 formed in the conduction port 12, whereby the packing 20 can be reliably disposed at an appropriate position so that a part thereof protrudes toward the distal end side F.

In addition, in the mounted state of the packing 20 in the mounting groove 122, a tapered space 123 is provided on the main body side B. After the connection between the conduction port 12 and the pipe end 102 is released, the lateral protruding portion 203a of the removal jig 200 is inserted into the tapered space 123, and is biased from the main body side B toward the side opposite to the packing 20 mounted in the mounting groove 122. Thereby, the packing 20 mounted in the mounting groove 122 can be easily removed and replaced.

Therefore, even when the gasket 20 needs to be replaced every time the gasket is used by conducting a corrosive gas or the like, the gasket 20 can be replaced easily and efficiently, and the gasket can be used safely.

In addition, since the mounting groove 122 and the tapered space 123 are formed in the conduction opening 12, the replaceability of the packing 20 can be improved.

Specifically, the attachment groove 122 and the tapered space 123 are provided in the introduction port 12 of the container valve device 1 which is easily detached and moved. The gasket 20 mounted in the mounting groove 122 can be easily removed as compared with the case where the mounting groove and the tapered space are provided in the pipe end 102 of the fixed flow path pipe 100. Therefore, the replaceability of the packing 20 can be improved.

The mounting groove 122 has a groove bottom surface 124 that contacts the gasket 20 with a predetermined pressure receiving area. The tapered space 123 is formed to a depth at which the lateral protruding portion 203a of the removal jig 200 can be inserted to a predetermined insertion depth. Thereby, in the connected state of the conduction port 12 and the pipe end portion 102, it is possible to reliably seal by the packing 20 mounted in the mounting groove 122, and it is possible to easily detach the packing 20 mounted in the mounting groove 122 by detaching the jig 200.

Specifically, since the mounting groove 122 has the groove bottom surface 124, and the groove bottom surface 124 is in contact with the gasket 20 with a predetermined pressure receiving area, the gasket 20 is not undesirably deformed in the above-described connected state, and the sealing can be reliably performed.

The removal jig 200 is composed of a side protruding portion 203a inserted into the tapered space 123, a side protruding portion 203b abutting against an opening edge forming the opening 21, and a gripping portion 201 acting on the side protruding portion 203a toward the arrow m with the side protruding portion 203b as a fulcrum.

The tapered space 123 is formed to a depth that enables the lateral protruding portion 203a of the removal jig 200 to be inserted to a predetermined insertion depth. Then, the lateral protruding portion 203a is inserted into the tapered space 123 by a predetermined insertion depth. The side protruding portion 203b is brought into contact with the opening edge forming the opening 21, and a force acting on the distal end side F with the side protruding portion 203b as a fulcrum is input to the side protruding portion 203a by the grip portion 201. This makes it possible to easily remove and replace the packing 20 from the mounting groove 122.

Further, since the tapered space 123 is provided radially inward of the mounting groove 122 of the mounting pad 20 and on the main body side B, the tapered space 123 having little influence on the gas to be conducted can be configured with a simple structure.

In the above description, the connection structure X between the container valve device 1 and the flow pipe 100, which is attached to the upper portion of the gas cylinder container, is connected to the flow pipe 100 for supplying or filling the gas, and restricts the gas flow. However, the connection structure Xa between the piping valve device 1a and the flow path piping 100 disposed between the flow path piping 100 may be employed.

Next, a connection structure Xa connecting the pipe valve device 1a and the flow pipe 100 will be described with reference to fig. 8 to 12.

Fig. 8, 10, and 11 are partially sectional schematic front views of a connection structure Xa between the piping valve device 1a and the flow piping 100, and fig. 9 is a partially sectional schematic explanatory view of the connection structure Xa between the piping valve device 1a and the flow piping 100. Fig. 12 is a partially sectional schematic front view showing a state where the packing 20 attached to the conduction port 12a of the piping valve device 1a is removed by the removal jig 200.

Fig. 8 is a partially sectional schematic front view of the connection structure Xa in an exploded state, and fig. 10 is a partially sectional schematic front view of the connection structure Xa in a state where the gasket 20 is attached to the conduction port 12a of the piping valve device 1a. Fig. 11 is a partially sectional schematic front view of the connection structure Xa in a connected state. In fig. 8, 10 and 11, a part of the conduction port 12a of the pipe valve device 1a, the packing 20 and the flow passage pipe 100 are shown in longitudinal sectional views.

Fig. 9 (a) is a partially sectional schematic perspective view showing a state before the packing 20 is attached to the conduction port 12a of the piping valve device 1a, and fig. 9 (b) is a partially sectional schematic perspective view showing the connection structure Xa in a state where the packing 20 is attached to the conduction port 12a of the piping valve device 1a.

Fig. 9 is a perspective view of the opening 12a, the packing 20, and the flow path pipe 100 viewed from the front, left side, and planar directions, but the left side is shown as a cut-away portion of the annular opening 12a and the packing 20.

The pipe valve device 1a is an on-off valve device that is mounted on the upper portion of the gas cylinder container, is disposed between the passage pipes 100, and is different from the container valve device 1 that restricts the gas communication, and restricts the communication of the gas flowing in the communication space 101 of the passage pipe 100.

In the following description, the same reference numerals are used for the same components as those in the connection structure X for connecting the container valve device 1 and the flow path pipe 100, and detailed description thereof will be omitted.

The pipe distribution valve device 1a is different from the cylinder valve device 1 which is constituted by a main body 10 having a cylinder attachment portion 13 attached to a cylinder container at a lower portion and having an introduction port 12 projecting laterally from a vicinity of a middle portion. Specifically, the piping valve device 1a is configured such that 2 introduction ports 12a protrude in both sides so as to be positioned on a straight line in a plan view through the main body 10a, and the main body 10a is formed in an inverted T shape in a front view.

Inside the main body 10a configured as described above, a flow path 14 is formed to connect the end portions of the 2 conduction ports 12 a. The other structures are the same as those of the container valve device 1, and thus detailed description is omitted.

The conduction port 12a of the main body 10a configured as described above is provided with an annular space 123a configured to be smaller than the mounting groove 122, instead of the tapered space 123 having a truncated cone shape in which the tip of the main body side B is reduced in diameter in the conduction port 12. Since the other structure of the conduction port 12a is the same as that of the conduction port 12, the description thereof is omitted.

In the connection structure Xa configured by connecting the pipe valve device 1a configured as described above to the flow path pipe 100, first, the packing 20 is mounted in the mounting groove 122 of the introduction port 12a (see fig. 8 to 10).

The pipe valve devices 1a are disposed between the pipe ends 102 of the flow path pipes 100 disposed at a predetermined interval in a state where the pipe ends 102 are exposed by displacing the cap nuts 103.

The introduction ports 12a of the pipe valve device 1a disposed between the pipe ends 102 of the flow path pipes 100 disposed at a predetermined interval face the pipe ends 102, respectively, and are brought into a state of being butted against each other by the packing 20. In this state, the cap nut 103 of the flow path pipe 100 is screwed to the screw portion 121 of the introduction port 12a, whereby the introduction ports 12a and the flow path pipe 100 are connected to each other, whereby the connection structure Xa can be configured.

The connection structure Xa configured as described above can exhibit the same effect as the connection structure X configured to connect the conduction port 12 and the flow path pipe 100.

Further, when the packing 20 mounted in the mounting groove 122 of each conduction port 12a is detached using the detaching jig 200, it is performed in the same manner as the removal of the packing 20 mounted in the mounting groove 122 of the conduction port 12 of the vessel valve device 1. Specifically, when the spacer 20 is removed by the removal jig 200, as shown in fig. 12, the lateral protruding portion 203a of the removal jig 200 is inserted into the annular space 123a. Then, the side protruding portion 203b is brought into contact with the opening edge of the front end side F of the opening 21, and the grip portion 201 is moved along the arrow m, whereby the pad 20 attached to the attachment groove 122 can be detached by the principle of leverage.

When the annular space 123a is formed on the inner diameter side of the mounting groove 122, a corner is formed by the annular space 123a and the flow path 14. Therefore, depending on the shape and size, the side protruding portion 203b does not abut on the opening edge of the distal end side F of the opening 21, and the upper ends of the side protruding portion 203a and the pillar portion 202 abut on the annular space 123a and the corner portion of the flow path 14. The pad 20 can be detached according to the principle of leverage using the contact portion as a fulcrum.

In the above description, the connection structures X and Xa connected to the flow path pipe 100 having the pipe end 102 at the end are described. However, for example, as in the CGA standard in the united states, a connection structure Xb may be configured by connecting to a flow passage pipe 100b having a fitting projection 105 on the tip side of the pipe end 102, and this case will be described with reference to fig. 13 and 14.

As shown in fig. 13, a fitting projection 105 projecting from the pipe end 102 is provided at the tip of the flow passage pipe 100 b. The fitting projection 105 has an outer diameter smaller than the outer diameter of the flow passage pipe 100 b. In this way, when the passage pipe 100b having the fitting convex portion 105 protruding from the pipe end portion 102 toward the distal end side is connected to the conduction port 12 or the conduction port 12a, the fitting convex portion 105 interferes and cannot be connected.

Here, the attachment groove 122 is provided in the same manner as the conduction port 12 and the conduction port 12a in the conduction port 12b constituting the connection structure Xb connected to the flow path pipe 100 b. However, the conduction port 12b is different from the conduction port 12 or the conduction port 12a in which the tapered space 123 or the annular space 123a is provided between the flow path 14 and the mounting groove 122. Specifically, in the conduction port 12b, a tapered space 123b is provided in the attachment groove 122, and an accommodation space 127 for accommodating the fitting convex portion 105 is provided between the tapered space 123b and the flow path 14.

That is, the introduction port 12 and the introduction port 12a are arranged in the order of the mounting groove 122, the tapered space 123 or the annular space 123a, and the flow path 14 from the distal end side F toward the main body side B. In contrast, the conduction port 12b is arranged in the order of the mounting groove 122, the tapered space 123b, the housing space 127, and the flow path 14. In other words, the tapered space 123b is formed between the mounting groove 122 and the receiving space 127.

The introduction port 12b configured in this manner may be provided in either a container valve device such as the container valve device 1 or a piping valve device such as the piping valve device 1a, or may be configured by an annular space similar to the annular space 123a instead of the tapered space 123 b.

The spacer 20b used in the connection structure Xb has an opening 21b with a larger diameter through which the fitting projection 105 can be inserted than the openings 21 of the spacers 20 used in the connection structure X and the connection structure Xa. Therefore, the diameter of the front end side F of the tapered space 123b is also larger than the diameter of the front end side F of the tapered space 123.

The connection structure Xb connecting the conduction port 12b, the packing 20b, and the flow path pipe 100b configured as described above can provide the same effects as those of the connection structure X and the connection structure Xa.

As shown in fig. 14, the spacer 20b attached to the attachment groove 122 of the conduction port 12b configured as above may be detached by using the detaching jig 200 in the same procedure as the procedure of detaching the spacer 20 attached to the attachment groove 122 of the

conduction ports

12 and 12 a.

In the correspondence of the structure of the present invention to the above-described embodiments, the fluid of the present invention corresponds to a gas,

in the following, as well as in the same way,

the flow path corresponds to the flow path 14,

the opening and closing valve device corresponds to the container valve device 1,

the conduction ports correspond to the conduction port 12, the conduction port 12a and the conduction port 12b,

the flow pipe corresponds to the flow pipe 100 and the flow pipe 100b,

the piping end corresponds to the piping end 102,

the connecting structure corresponds to the connecting structure X,

the openings correspond to the openings 21 and,

the sealing member corresponds to the packing 20,

the mounting slots correspond to the mounting slots 122,

the back side corresponds to the main body side B,

the removal jig corresponds to the removal jig 200,

the insertion convex portion corresponds to the side protruding portion 203a,

the insertion space corresponds to the cone-shaped space 123,

the contact surface corresponds to the groove bottom surface 124,

the contact portion corresponds to the side protruding portion 203b,

the removal direction corresponds to the arrow m,

the force point portion corresponds to the grip portion 201,

the present invention is not limited to the configurations of the above embodiments, and many embodiments can be obtained.

For example, although the above description has described a gas as the fluid, the fluid may be a liquid or a gel.

In the above description, the mounting groove 122 is provided in the conduction port 12, but the mounting groove may be provided in the pipe end 102, or the mounting groove 122 provided in the conduction port 12 may be provided in addition to the pipe end 102. When the pipe end 102 is provided with the mounting groove in addition to the mounting groove 122 provided in the conduction port 12, the shape of each groove may be the same, the packing 20 may be mounted in one of the mounting grooves, and the packing 20 may be fitted in the other mounting groove in a connected state. Further, the packing 20 may be mounted in any one of the main mounting grooves, and the packing 20 may be fitted in the other sub-mounting groove in the connected state.

In the above description, the tapered spaces 123 and 123B provided on the main body side B of the mounting groove 122 are substantially truncated cone-shaped spaces, and the annular space 123a is formed by an annular space, that is, a space that is continuous in the circumferential direction in a left side view. In contrast, the mounting groove 122 recessed in the circumferential direction with respect to the mounting pad 20 may be formed in a part of the circumferential direction or may be formed in a plurality of places.

In the removal jig 200, the lateral projecting portion 203 is configured to project from the upper end of the pillar portion 202 in both sides, but may be formed in a substantially L-shape in front view in which the lateral projecting portion 203 projects only in one direction, for example. In this case, the length from the tip of the side protruding portion 203 to the end portion on the opposite side of the pillar portion 202 may be formed longer than the diameter of the

openings

21, 21b of the

pads

20, 20 b.

Description of the reference numerals

1: container valve device

1a: pipe distribution valve device

12. 12a, 12b: conduction port

14: flow path

20. 20b: liner pad

21. 21b: opening of the container

100. 100b: flow path piping

102: end of piping

122: mounting groove

123. 123b: conical space

123a: annular space

124: bottom surface of groove

200: disassembling clamp

201: holding part

203a, 203b: side protruding part

B: side of main body

m: arrow head

X, xa, xb: connection structure

Claims

1. A connection structure of a conduit port as one end of a fluid passage and a pipe end of a fluid passage pipe communicating with the fluid in an opening/closing valve device having an opening/closing valve for switching opening/closing in a middle portion of the fluid passage,

wherein the conduction port and the pipe end are disposed in butt joint, and

an annular seal member having an opening is disposed between the conduction port and the pipe end portion,

an installation groove for installing the sealing member is formed on one of the conduction opening and the pipe fitting end,

in a mounted state in which the seal member is mounted in the mounting groove, an insertion space into which an insertion convex portion of a removal jig can be inserted is provided on a back surface side opposite to a side of the mounting groove opposite to the other of the conduction port and the pipe end portion.

2. The connection structure of claim 1, wherein the mounting groove and the insertion space are formed on the conduction opening.

3. The connecting structure according to claim 2, wherein the mounting groove has a contact surface that contacts the seal member with a prescribed pressure receiving area, and

the insertion space is formed at a depth at which the insertion convex portion of the removal jig can be inserted at a prescribed insertion depth, and the removal jig includes: the insertion space includes an insertion convex portion to be inserted into the insertion space, an abutting portion to abut against an opening edge forming the opening, and a force point portion to input a force acting in a detaching direction of the insertion convex portion with the abutting portion as a fulcrum.

4. The connection structure according to claim 2 or 3, wherein the insertion space is provided radially inside the mounting groove to which the seal member is mounted and on the back surface side.

5. A kind of opening and closing valve device is provided,

an on-off valve for switching the opening and closing of the passage is provided in the middle of the passage for conducting the fluid

One end of the flow path is used as a conduction port for butt joint connection with the end part of the flow path pipe conducting with the fluid,

an installation groove is arranged on the conduction opening and used for installing an annular sealing component with an opening,

in a state where the seal member is mounted in the mounting groove, an insertion space into which an insertion projection of a removal jig can be inserted is provided on a back surface side opposite to a side of the mounting groove facing the pipe end.

6. The opening/closing valve device according to claim 5, wherein the mounting groove has a contact surface that contacts the seal member with a prescribed pressure receiving area, and

7. The opening-closing valve device according to claim 5 or 6, wherein the insertion space is provided radially inside the mounting groove to which the seal member is mounted and on the back surface side.

8. A disassembly jig comprising:

an insertion projection portion that is disposed in a state where a conduction port as one end of a flow path pipe that conducts a fluid is butted against a pipe end portion of the flow path pipe that conducts the fluid in an opening/closing valve device having an opening/closing valve that switches opening/closing at an intermediate portion of the flow path that conducts the fluid, and an annular seal member having an opening is attached to an attachment groove formed in at least one of the conduction port and the pipe end portion between the conduction port and the pipe end portion, the insertion projection portion being inserted into an insertion space provided on a back surface side opposite to a side of the attachment groove that is opposite to the other of the conduction port and the pipe end portion;

an abutting portion abutting against an opening edge forming the opening; and

and a force point section for inputting a force that acts on the insertion projection section in the removal direction with the contact section as a fulcrum.