JP7154495B2 - Connection structure between conduit port and pipe end, opening/closing valve device, and removal jig - Google Patents

Description

The present invention provides, for example, an on-off valve device having an on-off valve that switches between opening and closing at an intermediate portion of a flow path through which a gas flows, a flow path that is one end of the flow path, and a pipe end of the flow path pipe through which the fluid flows. connection structure, an on-off valve device, and a removal jig for removing a sealing member attached to the on-off valve device.

In general, an on-off valve device equipped with an on-off valve that switches between an open state and a sealed state connects a conduit port, which is one end of a flow path, to the pipe end of a flow path pipe to conduct a fluid such as gas. Let At this time, as shown in Patent Document 1, a ring-shaped sealing member (gasket) is placed between the inlet and the pipe end to prevent gas from leaking from the joint between the inlet and the pipe end. are preventing.

Since such a sealing member is attached under pressure in order to obtain high sealing performance, it may deteriorate due to use and the sealing performance may deteriorate. A sealing member whose sealing performance has deteriorated in this way is replaced by disconnecting the connection between the conduit port and the end of the pipe. In particular, when the gas to be conducted is a highly corrosive gas with a high risk of leakage, the sealing member has to be replaced each time it is used.

However, as shown in Patent Literature 1, when the sealing member is mounted in the mounting groove (stepped portion), the sealing member can be placed in an appropriate position compared to simply arranging the sealing member in the joint portion. However, it is difficult to remove the mounted sealing member from the mounting groove, and the replaceability of the sealing member is low.

JP-A-2003-74798

Accordingly, the present invention provides a connection structure between a conduit port and a pipe end portion, an on-off valve device, and a removal valve that can easily replace a sealing member that can be arranged at an appropriate position in a connected state between the conduit port and the pipe end portion. The purpose is to provide jigs.

The present invention relates to an on-off valve device having an on-off valve that switches between opening and closing at an intermediate portion of a flow path through which a fluid is conducted, and a flow path that is one end of the flow path and a piping end of the flow path through which the fluid is conducted. In the connection structure, the conduction port and the pipe end are arranged to face each other, and a ring-shaped sealing member having an opening is arranged between the conduction port and the pipe end to connect the conduction port. A mounting groove for mounting the sealing member is formed in one of the port and the pipe end, and the connection port and the pipe end in a mounting state in which the sealing member is mounted in the mounting groove. It is characterized in that an insertion space into which the insertion protrusion of the removal jig can be inserted is provided on the back side, which is the side opposite to the side facing the other of the two.

The fluid may be a gas, liquid, or gel, or may be a fluid with a high risk of leaking, such as a highly corrosive gas.
The sealing member is a member, such as an O-ring, a rubber packing, a metal packing, etc., which has sealing properties and elasticity and is also called a gasket.

The opening/closing valve device is a container valve device that is attached to a container such as a cylinder to regulate the inflow and outflow of a fluid, or a pipe valve device that is attached between flow pipes and regulates conduction of a fluid flowing through the flow pipe. may
Further, the conducting direction of the fluid to be conducted may be one direction from one to the other of the flow path in the on-off valve device, one end of which is a conduction port, and the flow path pipe having the pipe end, For example, it may be bidirectional, such as charging and discharging, in which the direction of conduction changes according to the purpose of conduction.

The mounting groove formed in at least one of the conduit and the pipe end may be a mounting groove formed in the conduit, a mounting groove formed in the pipe end, or a mounting groove formed in the conduit. and the pipe end.

In addition, the mounting grooves formed in both the inlet and the end of the pipe have the same shape, and the sealing member is mounted in one of the mounting grooves formed in the same shape, and in the other mounting groove in the connected state. A mode in which the sealing member is fitted, or a mode in which one of the mounting grooves is the main mounting groove and the other subordinate mounting groove in the connected state is fitted with the sealing member may be adopted.

In the mounted state in which the sealing member is mounted in the mounting groove, a protrusion for inserting a removal jig is provided on the back side opposite to the side facing the other of the conduit port and the pipe end. The insertion space into which the sealing member is inserted may be formed in such a manner that the space on the inner diameter side recessed in a substantially stepped cross section is continuous in the circumferential direction with respect to the circumferentially recessed mounting groove for mounting the sealing member, It may be formed in a part in the circumferential direction, or may be formed in a plurality of places.

According to the present invention, the sealing member that can be arranged at an appropriate position in the connection state between the inlet and the pipe end can be easily removed and replaced.
More specifically, in an on-off valve device having an on-off valve that switches between opening and closing at an intermediate portion of a flow path through which a fluid flows, a flow path that is one end of the flow path and a pipe end of a flow path pipe through which the fluid flows are connected. In the butted connection structure, a sealing member arranged between the inlet and the pipe end is mounted in a mounting groove formed in one of the inlet and the pipe end, thereby achieving an appropriate position. The sealing member can be reliably arranged in the space.

In addition, in the mounting state in which the sealing member is mounted in the mounting groove, by providing the insertion space on the back surface side opposite to the side facing the other of the conduit port and the pipe end, The sealing member mounted in the mounting groove is removed by inserting the insertion protrusion of the removal jig into the insertion space and applying force to the sealing member mounted in the mounting groove from the back side toward the facing side. can be easily removed and replaced. Therefore, even when corrosive gas or the like is conducted such that the sealing member is replaced each time it is used, the sealing member can be replaced easily and efficiently, and the device can be used safely.

As a mode of this invention, the mounting groove and the insertion space may be formed in the inlet.
The present invention can improve the replaceability of the sealing member.

In detail, compared to the case where a mounting groove and an insertion space are provided at the pipe end of a fixed flow path pipe, by providing a mounting groove and an insertion space at the outlet of the on-off valve device that is easier to remove and move, mounting Since the sealing member attached to the groove can be easily removed, the replaceability of the sealing member can be improved.

Further, as an aspect of the present invention, the mounting groove has a contact surface that contacts the sealing member with a predetermined pressure receiving area, and the insertion space includes the insertion protrusion that is inserted into the insertion space and the opening. The insertion convex portion of the removal jig is composed of a contact portion that contacts the formed opening edge, and a power point portion that inputs a force that acts on the insertion convex portion in the removal direction with the contact portion as a fulcrum. It may be formed with a depth that can be inserted at an insertion depth of .

According to the present invention, in the connected state between the conduit port and the pipe end, the sealing member mounted in the mounting groove can reliably seal, and the sealing member mounted in the mounting groove can be removed by a removal jig. can be done.

More specifically, the mounting groove has a contact surface that contacts the sealing member with a predetermined pressure-receiving area. can be sealed.

The insertion space includes the insertion protrusion that is inserted into the insertion space, a contact portion that contacts the edge of the opening that forms the opening, and the insertion protrusion that acts in the removal direction with the corresponding contact portion as a fulcrum. Since the insertion convex portion of the removal jig, which is composed of a power point portion for inputting force and a force point portion for inputting force, is formed to a depth that allows insertion at a predetermined insertion depth, the insertion convex portion can be inserted into the insertion space at a predetermined insertion depth. In addition, it is easily sealed from the mounting groove by bringing the opening edge forming the opening into contact with the contact portion, and applying a force in the removal direction to the insertion convex portion using the contact portion as a fulcrum. The stop member can be removed and replaced.

Further, as a mode of the present invention, the insertion space may be provided radially inside the mounting groove in which the sealing member is mounted and on the rear surface side.
According to the present invention, it is possible to construct an insertion space with a simple structure that has little effect on the flowing fluid.

In addition, the present invention has an on-off valve for switching between opening and closing at an intermediate portion of a flow path through which the fluid flows, and a conduction port that abuts and connects one end of the flow path to a pipe end of the flow path pipe through which the fluid flows. and a mounting groove for mounting a ring-shaped sealing member having an opening is provided in the introduction port, and a side facing the pipe end in a mounting state in which the sealing member is mounted in the mounting groove The on-off valve device is characterized in that an insertion space into which the insertion protrusion of the removal jig can be inserted is provided on the back side, which is the opposite side.

According to the present invention, an on-off valve for switching between opening and closing is provided in an intermediate portion of a flow path through which a fluid is conducted, and a mounting groove provided in a conduction port that is butted and connected to a pipe end of a flow path pipe through which the fluid is conducted is sealed. By attaching the stopper member, the sealing member can be arranged at an appropriate position in the state of connection between the inlet and the pipe end.

Further, in the mounting state in which the sealing member is mounted in the mounting groove, by providing the insertion space on the back side, which is the side opposite to the side facing the pipe end, the insertion convex portion of the removal jig can be removed. To easily remove and replace a sealing member mounted in a mounting groove by inserting it into an insertion space and exerting a force on the sealing member mounted in the mounting groove from the back side toward the facing side. can be done. Therefore, even when corrosive gas or the like is conducted such that the sealing member is replaced each time it is used, the sealing member can be replaced easily and efficiently, and the device can be used safely.

Furthermore, the present invention provides an on-off valve device having an on-off valve that switches between opening and closing at an intermediate portion of a flow path through which a fluid flows, and a flow path that is one end of the flow path, and a pipe end of the flow path pipe through which the fluid flows. and a ring-shaped sealing member having an opening in a mounting groove formed in at least one of the inlet and the pipe end between the inlet and the pipe end. In the installed state, the insertion projection is inserted into an insertion space provided on the back surface side opposite to the side facing the other of the conduction port and the pipe end, and an opening that forms the opening. The removal jig is characterized by comprising a contact portion that contacts an edge and a power point portion that inputs a force acting on the insertion convex portion in a removal direction with the contact portion as a fulcrum.

According to the present invention, the sealing member mounted so as to be arranged at an appropriate position in the connected state between the conduit port and the pipe end can be easily removed with a removal jig and replaced.
More specifically, in an on-off valve device having an on-off valve that switches between opening and closing at an intermediate portion of a flow path through which a fluid flows, a flow path that is one end of the flow path and a pipe end of a flow path pipe through which the fluid flows are connected. In the butted connection structure, a sealing member disposed between the inlet and the pipe end is mounted in a mounting groove formed in one of the inlet and the pipe end, so that it can be positioned at an appropriate position. Inserting the insertion convex part of the removal jig into the insertion space provided on the rear surface side opposite to the side facing the other of the conduction port and the pipe end with respect to the disposing sealing member, and The opening edge forming the opening is brought into contact with the abutment portion, and the force point portion inputs a force to act on the insertion convex portion in the removal direction with the abutment portion as a fulcrum, so that the sealing member can be easily removed from the mounting groove. can be removed and replaced. Therefore, even when corrosive gas or the like is conducted such that the sealing member is replaced each time it is used, the sealing member can be replaced easily and efficiently, and the device can be used safely.

According to the present invention, there is provided a connecting structure, an opening/closing valve device, and a removal tool for connecting a conduit port and a pipe end portion, which can easily replace a sealing member that can be arranged at an appropriate position in a connected state between the conduit port and the pipe end portion. equipment can be provided.

FIG. 4 is a partially cross-sectional schematic front view of a connection structure between a container valve device and a flow path pipe; FIG. 4 is a partial cross-sectional schematic explanatory diagram of the connection structure between the container valve device and the flow path piping. FIG. 4 is a partially cross-sectional schematic front view of a connection structure between a container valve device and a flow path pipe; FIG. 4 is a partially cross-sectional schematic front view of a connection structure between a container valve device and a flow path pipe; FIG. 2 is a partially cross-sectional schematic perspective view of a connection structure between a container valve device and a flow path pipe; The perspective view of a removal jig. FIG. 10 is a partially cross-sectional schematic front view of a state in which a gasket attached to a conduit port of a container valve device is removed by a removal jig. FIG. 2 is a partially cross-sectional schematic front view of a connection structure between a piping valve device and a flow path piping; FIG. 4 is a partial cross-sectional schematic explanatory diagram of a connection structure between a piping valve device and a flow path piping; FIG. 2 is a partially cross-sectional schematic front view of a connection structure between a piping valve device and a flow path piping; FIG. 2 is a partially cross-sectional schematic front view of a connection structure between a piping valve device and a flow path piping; FIG. 4 is a partially cross-sectional schematic front view of a state of removal by a removal jig of a gasket attached to a conduit port of a piping valve device. FIG. 11 is a partial cross-sectional explanatory diagram of a connection structure between a conduit port and a flow path pipe according to another embodiment; FIG. 11 is a partially cross-sectional schematic front view of a state in which a gasket attached to a conduit port of another embodiment is removed by a removal jig.

A connection structure X between a container valve device 1 and a flow path pipe 100, which is an embodiment of the present invention, and removal of a gasket 20 mounted in a mounting groove 122 will be described with reference to FIGS. 1 to 7. FIG.
1, 3 and 4 show a partial cross-sectional schematic front view of the connection structure X between the container valve device 1 and the flow pipe 100, and FIG. 5 shows a partial cross-sectional schematic perspective view of the connection structure X between the inlet 12 of the container valve device 1 and the flow path pipe 100, and FIG. 6 shows a removal tool. FIG. 7 shows a perspective view of a tool 200, and FIG. 7 shows a partially cross-sectional schematic front view of a situation in which the gasket 20 attached to the inlet 12 of the container valve device 1 is removed by the removal tool 200. FIG.

1 shows a partially cross-sectional schematic front view of the disassembled state of the connection structure X, and FIG. 2 is a partially cross-sectional schematic front view of the connection structure X in a state where a gasket 20 is attached to the inlet 12 of the container valve device 1. , and FIG. 4 shows a partially cross-sectional schematic front view of the connection structure X in the connected state. 1, 2, and 4, the inlet 12 portion of the container valve device 1, the gasket 20, and the flow path piping 100 are shown as vertical sectional views.

2(a) shows a partially cross-sectional schematic perspective view of a state before the gasket 20 is attached to the inlet 12 of the container valve device 1, and FIG. FIG. 5 shows a partially cross-sectional schematic perspective view of the connection structure X in a state in which the device 20 is attached, and FIG. 5 shows a partially cross-sectional schematic perspective view of the connection structure X in the connected state.

2 and 5 show perspective views of the inlet 12, the gasket 20, and the flow path pipe 100 from the front, left side, and plane directions. A portion of the front side of the gasket 20 and the flow path pipe 100 is cut away for illustration.

In FIG. 7, which shows a partially cross-sectional schematic front view of a situation in which the gasket 20 attached to the conduit 12 of the container valve device 1 is removed by a removal jig 200, the conduit 12 and the gasket 20 of the container valve device 1 are shown as a longitudinal sectional view. Illustrated.

The container valve device 1 is an opening/closing valve device that is attached to the upper portion of a cylinder container (not shown), is connected to a flow path pipe 100 for gas supply and filling, and regulates the flow of gas.

The container valve device 1 includes a body 10 having a vertically elongated, substantially cylindrical shape, and a rotary handle 11 provided on the upper portion of the body 10 for rotating an on-off valve (not shown) provided inside the body 10. .
More specifically, the main body 10, which has a vertically elongated, substantially cylindrical shape, is provided with a laterally protruding conduction port 12 near the middle stage, and holds the cylinder mounted by being screwed to a mounting portion (not shown) at the top of the cylinder container. A mounting portion 13 is provided at the bottom.

Further, inside the main body 10, a flow passage 14 is provided that communicates with the tip portion of the inlet port 12 and the lower end portion of the cylinder mounting portion 13. As shown in FIG. Although not shown, a valve chamber is provided in the intermediate portion of the flow path 14 inside the main body 10 to accommodate a shut-off valve that opens and closes when the rotary handle 11 is rotated.

The conduction port 12 protruding sideways near the middle stage of the main body 10 has a substantially cylindrical shape having a horizontal flow path 14 in the center when viewed from the left side, and is screwed with a cap nut 103 attached to the flow path pipe 100. It has a threaded portion 121 that

In addition, a mounting groove 122 having a circular concave shape in a left side view for mounting the gasket 20 is provided on the left side surface of the substantially cylindrical conduction port 12, and a position radially inside a predetermined distance from the outer peripheral edge of the mounting groove 122 is provided. A tapered space 123 is provided in a tapered truncated conical shape toward the main body 10 side (hereinafter referred to as the body side B) from the end of the flow path 14 .

Furthermore, a sealing groove 125 having a triangular cross-section is provided on the outer diameter side of the tapered space 123 in the groove bottom surface 124 which is a predetermined interval from the outer edge of the mounting groove 122 to the tapered space 123 .

The mounting groove 122 configured in this manner is formed with an outer diameter approximately equal to the outer diameter of the gasket 20 and a depth about half the thickness of the gasket 20. , an inner peripheral convex portion 126 (see the enlarged view of part a in FIG. 1) is provided in close contact with the outer peripheral surface of the gasket 20 mounted in the mounting groove 122 .
The container valve device 1 configured as described above may be appropriately provided with a residual pressure holding mechanism, a backflow prevention mechanism, a decompression mechanism, a pressure gauge, a safety valve, and the like, depending on the specifications.

In the connection structure X, the gasket 20 arranged between the pipe end 102 of the flow path pipe 100 and the conduit 12 has an outer diameter slightly smaller than the diameter of the conduit 12, and has an opening 21 at the center in a side view. , which has a ring shape in a side view and is mounted in the mounting groove 122, and can exhibit sealing and elasticity in the connection structure X in which the inlet 12 and the flow path pipe 100 are joined. Suitable rubber packing, metal packing, or the like made up of materials.
The opening 21 is formed with a diameter equal to or greater than the diameter of the flow path 14 and smaller than the distal end side F (the side opposite to the body side B) of the tapered space 123 .

A flow path pipe 100 that is connected to the conduction port 12 via the gasket 20 and constitutes the connection structure X is a pipe having a conduction space 101 therein. A pipe end portion 102 is connected to the inlet port 12 of the valve device 1 . An end portion of the flow path pipe 100 opposite to the pipe end portion 102 is connected to an appropriate device, tank, or the like.

A pipe end portion 102 constituting one end portion of the flow channel pipe 100 is expanded to have a diameter substantially equal to that of the inlet port 12 to form a flange shape. Although not shown, a sealing groove having a triangular cross section is provided.

A cap nut 103 is attached to the flow path pipe 100 so as to be movable in the longitudinal direction. A cap nut 103 attached movably in the longitudinal direction to the flow path pipe 100 is restricted from moving toward the container valve device 1 by a pipe end portion 102 . A threaded portion 104 that is screwed with the threaded portion 121 of the inlet 12 is formed on the inner surface of the cap nut 103 .

Next, a method of forming the connection structure X by connecting the inlet 12 of the container valve device 1 configured in this way and the pipe end 102 of the flow path pipe 100 with the gasket 20 interposed will be described.
First, as shown in FIGS. 2 and 3, the gasket 20 is attached to the attachment groove 122 of the inlet 12 . At this time, the gasket 20 pushed into the mounting groove 122 having a shallower depth than the thickness of the gasket 20 is mounted on the front end side F of the inlet 12 (on the side of the flow path piping 100 and opposite to the body side B). It is installed in a manner projecting toward the tip side F from the surface of .

At this time, as shown in the enlarged view of part a in FIG. Since the gasket 20 is tightly pressed so as to be pressed inward, the gasket 20 is prevented from coming off carelessly from the mounting groove 122 .

In this way, the container valve device 1 and the flow path pipe 100 are arranged so that the conduit end 102 faces the conduit 12 with the gasket 20 mounted in the mounting groove 122 (see FIGS. 2(b) and 3). ), the threaded portion 104 of the cap nut 103 and the threaded portion 121 of the conduit 12 are screwed together to connect the conduit 12 and the flow path pipe 100 .

Furthermore, the cap nut 103 and the conduction port 12 are further screwed in, and the gasket 20 is sandwiched between the groove bottom surface 124 of the conduction port 12 and the side surface 102a of the pipe end 102, and the gasket 20 is sealed provided on the groove bottom surface 124. By tightening to such an extent that it bites into the groove 125 and the sealing groove provided in the side surface 102a, the connection between the conduit 12 and the flow path pipe 100 that are butted through the gasket 20 is completed, and the connection structure X is configured. It will happen.

The connection structure X with the conduit 12 and the flow path pipe 100 connected in this way is arranged by arranging the gasket 20 mounted in the mounting groove 122 at an appropriate position between the conduit 12 and the flow path pipe 100. can be done. In addition, as shown in the enlarged view of part a in FIG. Since the gasket 20 is in close contact so as to be pressed in the direction of , the gasket 20 is prevented from coming off carelessly from the mounting groove 122, and the gasket 20 can be arranged at an appropriate position in the connection structure X more reliably.

Moreover, since the gasket 20 mounted in a manner protruding toward the distal end side from the conduction port 12 is sandwiched between the groove bottom surface 124 and the side surface 102a and is tightened until it bites into each of the sealing grooves, a highly sealing connection can be achieved. Structure X can be constructed. Therefore, even if a highly corrosive gas or the like is passed through, it will not leak and can be used safely.

Thus, although the connection structure X achieves high sealing performance, as described above, the gasket 20 is sandwiched between the groove bottom surface 124 and the side surface 102a and is tightened until it bites into each sealing groove. When it deteriorates, it must be replaced. Next, a removal jig 200 for removing the gasket 20 mounted in the mounting groove 122 and a method for removing the gasket 20 using the removal jig 200 will be described.

As shown in FIG. 6, the removal jig 200 includes a cylindrical grip portion 201 gripped by a person who replaces it, a strut portion 202 projecting upward from the grip portion 201, and protruding to both sides from the upper end of the strut portion 202. The strut portion 202 and the side protruding portion 203 form a substantially T-shaped symmetrical shape when viewed from the front.

The strut portion 202 has a substantially cylindrical shape with a smaller diameter at the top compared to the base portion, and the side protruding portions 203 protruding to both sides extend from the upper end of the strut portion 202 that curves slightly convex upward. It is formed so that the curved shape continues toward the direction.

Therefore, one side protrusion 203 (for example, side protrusion 203a), the support 202, and the other side protrusion 203 (for example, side protrusion 203b) of the two sides are curved upward. The thickness of the side protruding portion 203 gradually decreases in the protruding direction, and becomes thick enough to be inserted between the gasket 20 mounted in the mounting groove 122 and the tapered space 123. formed in shape.

In addition, the length of the side protruding portion 203 which protrudes to both sides and forms a substantially T-shape together with the support portion 202 in the depth direction (the direction connecting the lower right and upper left in FIG. 6) is equal to the length of the support portion 202. It is formed with the same length as the diameter-reduced portion of Therefore, the shape is such that one of the side surface of the side protruding portion 203 in the depth direction and the depth direction of the support portion 202 does not protrude and matches.

In addition, the distance between the ends of the side projecting portion 203 projecting to both sides (the length connecting the upper right end and the lower left end in FIG. 6) is formed longer than the diameter of the opening 21 of the gasket 20. ing. Furthermore, the diameter of the diameter-reduced portion of the support pillar 202 , which has a substantially cylindrical shape whose upper portion has a diameter smaller than that of the root portion, is formed to be smaller than the diameter of the opening 21 of the gasket 20 . Therefore, the length in the depth direction of the side projecting portion 203, which is formed to have the same length as the diameter-reduced portion of the support portion 202, is also formed to be shorter than the diameter of the opening 21 of the gasket 20. As shown in FIG.

In order to remove the gasket 20 mounted in the mounting groove 122 using the removal jig 200 configured in this way, the removal jig 200 is directed obliquely to the inlet 12 and the post 202 of the removal jig 200 is removed. One of the side projections 203 projecting to both sides is inserted into the body side B from the opening 21 of the gasket 20 . Here, the side projecting portion 203a is inserted. In addition, since the side protruding portion 203a and the side protruding portion 203b are formed in a symmetrical shape, the side protruding portion 203b may be inserted.

At this time, the tip of the side protruding portion 203a is inserted into the tapered space 123 on the body side B of the gasket 20, and the other side protruding portion 203b is inserted into the tip side F of the opening edge forming the opening 21 in the gasket 20. It is brought into contact with the corner (see FIG. 7).

In this state, by moving the gripping portion 201 in the direction of the arrow m (see FIG. 7), the force input from the gripping portion 201 moves the side protruding portion 203b contacting the corner of the opening edge of the opening 21. As a fulcrum, it acts as a force on the front end side F on the side protruding portion 203a according to the principle of leverage.

Therefore, the side protruding portion 203a inserted into the tapered space 123 exerts a force on the tip side F on the gasket 20 located on the tip side F of the side protruding portion 203a, and the force on the tip side F acts. The gasket 20 can be pushed out by the lateral protrusion 203 a to remove the gasket 20 from the mounting groove 122 .

In this way, the conduit port 12, which is one end of the flow path 14 in the container valve device 1 having an on-off valve for switching between opening and closing at the intermediate portion of the flow path 14 through which the gas flows, and the pipe end of the flow path pipe 100 through which the gas flows. In the connection structure X with the portion 102, the inlet 12 and the pipe end 102 are arranged to face each other, and between the inlet 12 and the pipe end 102, an opening 21 having a diameter equal to or larger than the diameter of the flow path 14 is formed. A ring-shaped gasket 20 is arranged, and a mounting groove 122 for mounting the gasket 20 is formed in the inlet 12 in such a manner that a part of the gasket 20 is projected toward the tip side F, and the mounting groove 122 is mounted with the gasket 20 By providing a tapered space 123 into which the side protruding portion 203a of the removal jig 200 can be inserted, the gasket 20 can be placed in an appropriate position when the inlet 12 and the pipe end 102 are connected. As well as being able to be arranged, the gasket 20 mounted in the mounting groove 122 can be easily removed and replaced.

More specifically, the conduit port 12, which is one end of the flow path 14 in the container valve device 1 having an on-off valve for switching between opening and closing at the intermediate portion of the flow path 14 through which the gas flows, and the pipe end of the flow path pipe 100 through which the gas flows. In the connection structure X in which the portion 102 is butted and connected, the gasket 20 arranged between the inlet 12 and the pipe end 102 is mounted in the mounting groove 122 formed in the inlet 12, The gasket 20 can be reliably arranged at an appropriate position in a manner that a portion of the gasket 20 protrudes from the outer surface.

Further, since the taper-shaped space 123 is provided on the body side B in the mounting state where the gasket 20 is mounted in the mounting groove 122, the removal jig 200 can be removed after the connection state between the conduit port 12 and the pipe end portion 102 is broken. is inserted into the tapered space 123, and a force is applied to the gasket 20 mounted in the mounting groove 122 from the body side B toward the facing side, thereby removing the gasket 20 mounted in the mounting groove 122. can be easily removed and replaced.

Therefore, even when corrosive gas or the like is conducted such that the gasket 20 must be replaced each time it is used, the gasket 20 can be replaced easily and efficiently and used safely.

Also, since the mounting groove 122 and the tapered space 123 are formed in the inlet 12, the replaceability of the gasket 20 can be improved.
In detail, compared to the case where the mounting groove and the tapered space are provided in the pipe end portion 102 of the fixed flow path pipe 100, the installation groove 122 and the tapered shape are provided in the connection port 12 of the container valve device 1 which is easier to remove and move. By providing the space 123, the gasket 20 mounted in the mounting groove 122 can be easily removed, so that the replaceability of the gasket 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, and the tapered space 123 has a side protruding portion 203a that is inserted into the tapered space 123 and an opening that forms the opening 21. The side protruding portion 203a in the removal jig 200 is composed of the side protruding portion 203b that abuts on the edge, and the grip portion 201 that acts on the side protruding portion 203b in the direction of the arrow m with the side protruding portion 203b as a fulcrum. Therefore, in the connected state between the inlet 12 and the pipe end 102, the gasket 20 mounted in the mounting groove 122 can reliably seal, and the mounting groove 122 The mounted gasket 20 can be easily removed with the removal jig 200. - 特許庁

More specifically, by providing the mounting groove 122 with the groove bottom surface 124 that contacts the gasket 20 with a predetermined pressure receiving area, the gasket 20 can be reliably sealed without unintended deformation in the above-described connected state.

Further, the tapered space 123 has a lateral projection 203a inserted into the tapered space 123, a lateral projection 203b abutting the opening edge forming the opening 21, and a lateral projection with the lateral projection 203b as a fulcrum. Since the side protruding portion 203a of the removal jig 200, which is composed of the grip portion 201 that causes the portion 203a to act in the direction of the arrow m, is formed to a depth that allows it to be inserted at a predetermined insertion depth, The side protruding portion 203a is inserted into the tapered space 123, the side protruding portion 203b is brought into contact with the opening edge forming the opening 21, and the side protruding portion 203b is used as a fulcrum, and the distal end side F of the side protruding portion 203a is pushed. The gasket 20 can be easily removed from the mounting groove 122 and replaced by inputting a force that acts on the gasket 20 from the grip portion 201 .

In addition, since the tapered space 123 is provided on the inner side of the mounting groove 122 in which the gasket 20 is mounted and on the body side B, the tapered space 123 can be configured with a simple structure that has little effect on the conducting gas. can.

In the above description, the container valve device 1 and the flow path pipe 100 are connected to the flow path pipe 100 for gas supply and filling, and are attached to the upper part of the cylinder container, and regulate gas flow. Although the connection structure X has been described, the connection structure Xa between the pipe valve device 1a arranged between the flow pipes 100 and the flow pipes 100 may be used.

A connection structure Xa for connecting the pipe valve device 1a and the flow pipe 100 will be described below with reference to FIGS. 8 to 12. FIG.
8, 10, and 11 show partial cross-sectional schematic front views of the connection structure Xa between the pipe valve device 1a and the flow pipe 100, and FIG. 9 shows the connection between the pipe valve device 1a and the flow pipe 100. FIG. 12 shows a partial cross-sectional schematic explanatory view of the structure Xa, and FIG. 12 shows a partial cross-sectional schematic front view of the state of removing the gasket 20 attached to the inlet 12a of the piping valve device 1a by the removing jig 200. FIG.

8 shows a partially cross-sectional schematic front view of the disassembled state of the connection structure Xa, and FIG. 10 is a partially cross-sectional schematic front view of the connection structure Xa in a state where the gasket 20 is attached to the inlet port 12a of the pipe valve device 1a. , and FIG. 11 shows a partially cross-sectional schematic front view of the connection structure Xa in the connected state. 8, 10 and 11 show longitudinal sectional views of the inlet port 12a of the piping valve device 1a, the gasket 20, and the flow path piping 100. As shown in FIG.

FIG. 9(a) shows a partially cross-sectional schematic perspective view of a state before the gasket 20 is attached to the conduit port 12a of the pipe valve device 1a, and FIG. FIG. 5 shows a partially cross-sectional schematic perspective view of the connection structure Xa in a state where the connection structure Xa is mounted with the device 20, and FIG. 5 shows a partially cross-sectional schematic perspective view of the connection structure Xa in the connected state.

FIG. 9 shows perspective views of the inlet 12a, the gasket 20, and the flow pipe 100 from the front, left side, and plane directions. A part of the front side of the pipe 100 is cut away for illustration.

Unlike the container valve device 1 described above, which is attached to the upper part of the cylinder container and regulates the conduction of gas, the pipe valve device 1a is arranged between the flow channel pipes 100 so that the gas flows through the conduction space 101 of the flow channel pipes 100. It is an on-off valve device that regulates the conduction of gas.

In the following description, the same reference numerals are used for the same configurations as those in the connection structure X connecting the container valve device 1 and the flow path pipe 100 described above, and detailed description thereof will be omitted.
Unlike the container valve device 1 which comprises a body main body 10 having a cylinder mounting portion 13 to be mounted on the cylinder container at the bottom and a conduction port 12 protruding sideways from near the middle stage, the pipe valve device 1a has a body main body 10a. , two conduction ports 12a protrude to both sides so as to form a straight line in a plan view, forming an inverted T-shaped main body 10a in a front view.

Inside the body main body 10a configured in this way, a channel 14 is formed therein for connecting the ends of both of the conduction ports 12a. Since other configurations are the same as those of the container valve device 1, detailed description thereof will be omitted.

The outlet 12a of the main body 10a configured in this way has a ring-shaped space that is one size smaller than the mounting groove 122 instead of the tapered space 123 in the body side B of the inlet 12. A ring-shaped space 123a is provided. Since the rest of the configuration of the conduit 12a is the same as the configuration of the conduit 12, description thereof will be omitted.

In the connection structure Xa configured by connecting the pipe valve device 1a configured in this way to the flow path pipe 100, first, the gasket 20 is mounted in the mounting groove 122 of the inlet 12a (see FIGS. 8 to 10).
Then, the cap nut 103 is shifted to expose the pipe ends 102, and the pipe valve device 1a is arranged between the pipe ends 102 of the flow path pipes 100 arranged at a predetermined interval.

The conduit ports 12a of the pipe valve device 1a arranged between the pipe ends 102 of the flow channel pipe 100 arranged at a predetermined interval face the pipe ends 102 and are butted against each other via the gasket 20. In this state, by screwing the cap nut 103 of the channel pipe 100 and the threaded portion 121 of the conduit 12a, the conduit 12a and the conduit 100 are connected to form the connection structure Xa. can do.

The connection structure Xa configured in this way can achieve the same effects as the connection structure X configured by connecting the inlet 12 and the flow path pipe 100 .
When removing the gasket 20 mounted in the mounting groove 122 of each conduit 12a with the removal jig 200, as shown in FIG. , insert the side protruding portion 203a of the removal jig 200 into the ring-shaped space 123a, bring the side protruding portion 203b into contact with the opening edge on the tip side F of the opening 21, and hold the grip portion 201. By moving in the direction of arrow m, the gasket 20 mounted in the mounting groove 122 can be removed using the principle of leverage.

Furthermore, in the case of the ring-shaped space 123a that forms a ring-shaped space on the inner diameter side of the mounting groove 122, since the ring-shaped space 123a and the channel 14 form a corner, depending on the shape and size, The side protrusion 203a and the upper end of the support 202 are brought into contact with the corner between the ring-shaped space 123a and the flow path 14 without causing the side protrusion 203b to contact the opening edge of the opening 21 on the tip side F, The gasket 20 can also be removed by the principle of leverage with this contact point as a fulcrum.

Further, in the above description, the connection structures X and Xa connected to the flow path pipe 100 having the pipe end 102 at its end were explained. The connection structure Xb may be configured by connecting to the flow path pipe 100b having the fitting protrusion 105 on the distal end side, and this case will be described with reference to FIGS. 13 and 14. FIG.
In the following description, the same reference numerals are used for the same configurations as those in the connection structure X connecting the container valve device 1 and the flow path pipe 100, and detailed description thereof will be omitted.

As shown in FIG. 13, a fitting convex portion 105 projecting more than the pipe end portion 102 is provided at the tip of the flow pipe 100b. The fitting projection 105 has a smaller diameter than the outer diameter of the flow path pipe 100b. When the flow path pipe 100b provided with the fitting convex portion 105 projecting forward from the pipe end portion 102 is connected to the conventional conduction port 12 or the conduction port 12a, the fitting convex portion 105 interferes with the connection. Can not do it.

Therefore, although the connection port 12b constituting the connection structure Xb connected to the flow path pipe 100b is provided with the mounting groove 122 in the same manner as the connection port 12 and the connection port 12a, a tapered space is provided between the flow path 14 and the mounting groove 122. 123 and the ring-shaped space 123a are provided in the conduit 12 and the conduit 12a. A fitting protrusion accommodating space 127 for accommodating the fitting protrusion 105 is provided.

That is, from the front end side F toward the body side B, the installation groove 122, the tapered space 123 or the ring-shaped space 123a, and the flow path 14 are arranged in this order. 12b, the mounting groove 122, the tapered space 123b, the fitting projection accommodation space 127, and the flow path 14 are arranged in this order. Further, in other words, the tapered space 123b is formed between the mounting groove 122 and the fitting protrusion accommodating space 127. As shown in FIG.

The conduit port 12b configured in this manner may be provided in either a container valve device such as the container valve device 1 or a pipe valve device such as the pipe valve device 1a. A ring-shaped space similar to the shaped space 123a may be used.

Moreover, the gasket 20b used for the connection structure Xb has an opening 21b having a larger diameter than the opening 21 of the gasket 20 used for the connection structure X or the connection structure Xa, through which the fitting protrusion 105 can be inserted. Therefore, the diameter of the tapered space 123b on the tip side F is also larger than the diameter of the tapered space 123b on the tip side F.

The connection structure Xb configured by connecting the inlet 12b, the gasket 20b, and the flow path pipe 100b configured in this way is a connection configured by connecting the container valve device 1 having the inlet 12 and the flow path pipe 100. The same effects as those of the connection structure Xa configured by connecting the structure X and the pipe valve device 1a having the conduit port 12a to the flow path pipe 100 can be obtained.

As shown in FIG. 14, the gasket 20b mounted in the mounting groove 122 of the inlet 12b configured in this way can also be removed in the same procedure as the gasket 20 mounted in the mounting groove 122 of the inlet 12 or the inlet 12a. It can be removed using the removal jig 200 according to the procedure.

In the configuration of the present invention and corresponding to the above-described embodiments, the fluid of the present invention corresponds to gas,
and so on,
the channel corresponds to channel 14,
The opening and closing valve device corresponds to the container valve device 1,
The conduit corresponds to the conduit 12, the conduit 12a, and the conduit 12b,
The flow path piping corresponds to the flow path piping 100 and the flow path piping 100b,
The pipe end corresponds to the pipe end 102,
the connection structure corresponds to the connection structure X,
the opening corresponds to the opening 21,
The sealing member corresponds to the gasket 20,
The mounting groove corresponds to the mounting groove 122,
The back side corresponds to the body side B,
The removal jig corresponds to the removal jig 200,
The insertion protrusion corresponds to the lateral protrusion 203a,
The insertion space corresponds to the tapered space 123,
The contact surface corresponds to the groove bottom surface 124,
The abutting portion corresponds to the side protruding portion 203b,
The removal direction corresponds to the arrow m,
The force part corresponds to the grip part 201,
The present invention is not limited to the configurations of the above-described embodiments, and many embodiments can be obtained.
For example, in the above explanation, gas was explained as the fluid, but liquid or gel may also be used.

In the above description, the mounting groove 122 is provided in the conduit port 12, but the pipe end portion 102 may be provided with a mounting groove. Grooves may be provided. In this way, when mounting grooves are provided in the pipe end portion 102 in addition to the mounting grooves 122 provided in the inlet 12, the respective grooves are formed in the same shape, and the gasket 20 is mounted on one of them to connect them. Alternatively, the gasket 20 may be fitted in one of the mounting grooves as the main mounting groove, and the gasket 20 may be mounted in the other mounting groove as the subordinate mounting groove in the connected state. A mode in which the gasket 20 is fitted may be adopted.

In the above description, the tapered spaces 123 and 123b provided on the body side B of the mounting groove 122 are substantially truncated cone-shaped spaces, and the ring-shaped space 123a is a ring-shaped space, that is, in the circumferential direction when viewed from the left side. However, it may be formed in a part of the circumferentially recessed mounting groove 122 in which the gasket 20 is mounted, or may be formed in a plurality of positions.

Also, in the removal jig 200, the side protrusions 203 are configured to protrude from the upper end of the support 202 to both sides. You may form so that it may become a letter shape. In this case, the length from the tip of the side projecting portion 203 to the opposite end of the support 202 should be longer than the diameter of the openings 21, 21b of the gaskets 20, 20b.

Reference Signs List 1 Container valve device 1a Piping valve device 12, 12a, 12b Conduit port 14 Flow path 20, 20b Gasket 21, 21b Opening 100, 100b Flow path piping 102 Piping end 122 Mounting groove 123 123b... Tapered space 123a... Ring-like space 124... Groove bottom surface 200... Removal jig 201... Holding parts 203a, 203b... Lateral protruding part B... Body side m... Arrows X, Xa, Xb... Connection structure

Claims (8)

A connection structure between a conduction port, which is one end of the flow path, and a pipe end of a flow path pipe, through which the fluid is conducted, in an on-off valve device having an on-off valve that switches between opening and closing at an intermediate portion of the flow path through which the fluid is conducted. hand,
The conduit port and the pipe end are arranged to face each other,
A ring-shaped sealing member having an opening is arranged between the conduit port and the pipe end,
A mounting groove for mounting the sealing member is formed in one of the conduit port and the pipe end,
On the back side opposite to the side facing the other of the conduit port and the pipe end in the mounting state in which the sealing member is mounted in the mounting groove,
Connection structure provided with an insertion space into which the insertion protrusion of the removal jig can be inserted. 2. The connection structure according to claim 1, wherein said mounting groove and said insertion space are formed in said inlet. The mounting groove has a contact surface that contacts the sealing member with a predetermined pressure receiving area,
The insertion space is
The insertion convex portion that is inserted into the insertion space, the contact portion that contacts the edge of the opening that forms the opening, and the force point portion that inputs a force acting in the removal direction of the insertion convex portion with the corresponding contact portion as a fulcrum. 3. The connection structure according to claim 2, wherein said insertion projection in said removal jig is formed to a depth that allows insertion at a predetermined insertion depth. The insertion space is
4. The connection structure according to claim 2, which is provided radially inside the mounting groove in which the sealing member is mounted and on the rear surface side. Having an on-off valve that switches between opening and closing at an intermediate portion of the flow path through which the fluid is conducted,
one end of the flow path is a conduction port that is butted against and connected to a pipe end of a flow path pipe through which the fluid flows;
A mounting groove for mounting a ring-shaped sealing member having an opening is provided in the conduction port,
Opening and closing provided with an insertion space into which the insertion protrusion of the removal jig can be inserted on the back side opposite to the side facing the end of the pipe in the mounted state in which the sealing member is mounted in the mounting groove. valve device. The mounting groove has a contact surface that contacts the sealing member with a predetermined pressure receiving area,
The insertion space is
The insertion convex portion that is inserted into the insertion space, the contact portion that contacts the edge of the opening that forms the opening, and the force point portion that inputs a force acting in the removal direction of the insertion convex portion with the corresponding contact portion as a fulcrum. 6. The on-off valve device according to claim 5, wherein the insertion protrusion in the removal jig is formed to a depth that allows insertion at a predetermined insertion depth. The insertion space is
7. The on-off valve device according to claim 5 or 6, which is provided radially inside the mounting groove in which the sealing member is mounted and on the rear surface side. In an on-off valve device having an on-off valve that switches between opening and closing in an intermediate portion of a flow path through which a fluid is conducted, a conduction port, which is one end of the flow path, and a pipe end of a flow path pipe through which the fluid is conducted are placed in abutment. In addition, in a mounted state in which a ring-shaped sealing member having an opening is mounted in a mounting groove formed in at least one of the conduit and the pipe end between the conduit and the pipe end, an insertion protrusion that is inserted into an insertion space provided on a back surface side opposite to the side facing the other of the conduit port and the pipe end;
a contact portion that contacts an opening edge that forms the opening;
and a force point portion for inputting a force acting on the insertion convex portion in the removal direction with the contact portion as a fulcrum.

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