JP7408079B2 - How to remove the connection structure connecting the conduction port and the end of the pipe, the on-off valve device, and the sealing member - Google Patents

Description

For example, the present invention provides an on-off valve device having an on-off valve that switches opening and closing in an intermediate portion of a flow path through which gas flows, and a through port that is one end of the flow path, and a piping end of flow path piping through which the fluid flows. The present invention relates to a connection structure in which the on-off valve device is connected to the on-off valve device, and a method 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 the communication port, which is one end of the flow path, to the end of the flow path piping to conduct fluid such as gas. let At this time, as shown in Patent Document 1, a ring-shaped sealing member (gasket) is placed between the conduction port and the pipe end to prevent gas from leaking from the joint between the conduction port and the pipe end. It is prevented.

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

However, as shown in Patent Document 1, when the sealing member is attached to the mounting groove (step part), the sealing member can be placed at an appropriate position compared to the case where the sealing member is simply placed at the joint. However, it was difficult to remove the sealing member in the installed state from the mounting groove, and the replaceability of the sealing member was low.

JP2003-74798A

Therefore, the present invention provides a connection structure for connecting a conduction port and a pipe end, and an opening/closing valve, in which a sealing member that can be placed at an appropriate position in a connected state between the conduction port and the pipe end can be easily replaced. It is an object of the present invention to provide a method for removing a device and a sealing member.

The present invention provides an on-off valve device having an on-off valve that switches opening and closing in an intermediate portion of a flow path through which a fluid flows, and which includes a communication port that is one end of the flow path and a piping end of a flow path piping through which the fluid flows. The connection structure is such that the conduction port and the piping end are butted, and a substantially columnar insertion tip of the removal jig can be inserted between the conduction port and the piping end. A ring-shaped sealing member having a wide opening is disposed, a mounting groove for mounting the sealing member is formed in at least one of the communication port and the pipe end, and the sealing member is mounted in the mounting groove. In the installed state, the removal jig with the insertion tip inserted into the opening is placed on the back side that is opposite to the side facing the other of the conduction port and the piping end. The present invention is characterized in that an interference prevention space is provided to prevent interference with the insertion tip when the stop member is tilted to remove it.

Further, the present invention includes an on-off valve that switches opening and closing in an intermediate portion of a flow path through which fluid conducts, and a conduction port that connects one end of the flow path to a piping end of flow path piping through which fluid flows. and a mounting groove for mounting a ring-shaped sealing member having an opening through which a substantially columnar insertion tip of a removal jig can be inserted is provided in the conduction port, and the sealing member is mounted in the mounting groove. When the removal jig, with the insertion tip inserted into the opening, is tilted to remove the sealing member on the back side opposite to the side facing the pipe end in the installed state, The opening/closing valve device is characterized in that it is provided with an interference prevention space that prevents interference with the insertion tip.

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

The above-mentioned on-off valve device is a container valve device that is attached to a container such as a cylinder to regulate the inflow and outflow of fluid, or a piping valve device that is attached between flow path piping to restrict conduction of fluid flowing through the flow path piping. You can.
Further, the direction of conduction of the fluid may be one direction from one of the flow path in the on-off valve device whose one end is a communication port and a flow path piping having a piping end to the other, For example, it may be bidirectional, such as filling and discharging, where the direction of conduction changes depending on the purpose of conduction.

The above-mentioned mounting groove formed in at least one of the conduction port and the pipe end is a mounting groove formed in the conduction port, a mounting groove formed in the pipe end, or a mounting groove formed in the conduction port and the pipe end. It may also be a mounting groove formed on both the end portion and the end portion.

Note that the mounting grooves formed in both the conduction port and the pipe end are formed in the same shape, and a sealing member is mounted in one of the mounting grooves, and in the connected state, the sealing member is inserted into the other mounting groove. It is also possible to adopt an embodiment in which the sealing member fits, or an embodiment in which one of the mounting grooves is the main mounting groove and the sealing member fits into the other secondary mounting groove in the connected state.

In the installed state in which the sealing member is installed in the above-mentioned installation groove, the opening is penetrated by the opening on the back surface side that is opposite to the side facing the other of the conduction port and the piping end. The interference prevention space that prevents interference with the insertion tip that moves to remove the sealing member is an inner diameter side recessed with a substantially stepped cross section with respect to a circumferentially recessed mounting groove in which the sealing member is mounted. The space may be formed in a continuous manner in the circumferential direction, may be formed in a part in the circumferential direction, or may be formed in a plurality of locations. Furthermore, it may be a space formed on the back side of an opening formed in a small diameter with respect to a large diameter flow path.

According to the present invention, the sealing member, which can be placed at an appropriate position in a state where the communication port and the pipe end are connected, can be easily removed and replaced.
Specifically, in an on-off valve device having an on-off valve that switches opening and closing in an intermediate portion of a flow path through which a fluid flows, a conduction port that is one end of the flow path and a piping end of a flow path piping through which the fluid conducts are connected. In the abutted connection structure, a sealing member disposed between the conduction port and the pipe end is mounted in a mounting groove formed in at least one of the conduction port and the pipe end, so that the sealing member can be placed in an appropriate position. The sealing member can be reliably disposed at.

Further, in the installed state in which the sealing member is installed in the installation groove, an interference prevention space is provided on the back surface side that is opposite to the side facing the other of the conduction port and the piping end. , the removal jig with the insertion tip inserted into the opening is tilted in order to remove the sealing member installed in the mounting groove, and a force is applied from the back side to the side facing the sealing member. By acting, the sealing member mounted in the mounting groove can be easily removed and replaced without interference from the substantially columnar insertion tip of the removal jig.

Therefore, even when conducting corrosive gas or the like, which requires replacing the sealing member every time it is used, the sealing member can be easily and efficiently replaced and the device can be used safely.
Furthermore, since the insertion tip is inserted into the opening, the removed sealing member is fitted onto the insertion tip, which can prevent the sealing member from scattering and being lost, for example. .

As an aspect of the present invention, the mounting groove and the interference prevention space may be formed in the communication port.
According to this invention, the replaceability of the sealing member can be improved.

Specifically, compared to the case where a mounting groove and an interference prevention space are provided at the end of a fixed flow path piping, a mounting groove and an interference prevention space are provided at the communication port of the on-off valve device, which is easier to remove and move. Thus, the sealing member mounted in the mounting groove can be easily removed, and 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 in a predetermined pressure receiving area, and the interference prevention space is located on the radially inner side of the mounting groove to which the sealing member is mounted. Further, it may be provided on the back surface side.

According to the present invention, in the connection state between the conduction port and the pipe end, it is possible to reliably seal the connection state with the sealing member installed in the mounting groove, and also to remove the sealing member installed in the mounting groove with a removal jig. Can be done.

Specifically, by having a contact surface that contacts the sealing member with a predetermined pressure-receiving area in the mounting groove, the sealing member can be pressurized reliably without causing unintended deformation in the connected state. Can be sealed.

Further, since the interference prevention space is provided on the radially inner side of the mounting groove in which the sealing member is installed and on the back surface side, the interference prevention space that has little influence on the flowing fluid can be configured with a simple structure. be able to.

The present invention also provides an on-off valve device having an on-off valve that switches opening and closing in an intermediate portion of a flow path through which a fluid flows, and a through port that is one end of the flow path; A sealing member removal method for removing the sealing member attached to a mounting groove formed in at least one of the conduction port and the pipe end in a connection structure in which the sealing member is attached to the mounting groove. The removal jig with the insertion tip inserted into the opening is placed on the back side, which is the side opposite to the side facing the other of the conduction port and the piping end, in the installed state where the stopper member is installed. , an interference prevention space is provided to prevent interference with the insertion tip when the sealing member is tilted for removal, and the insertion tip is inserted into the opening of the sealing member installed in the mounting groove. The sealing member is removed from the mounting groove by tilting the removal jig through which the sealing member is inserted with respect to the insertion direction.

According to the present invention, a sealing member is attached to a mounting groove formed in at least one of the conduction port and the pipe end, so that the sealing member is placed in an appropriate position when the conduction port and the pipe end are connected. A sealing member can be placed.

Further, in the installed state in which the sealing member is installed in the installation groove, an interference prevention space is provided on the back side that is opposite to the side facing the other of the conduction port and the piping end. Then, the removal jig with the insertion tip inserted into the opening is tilted in order to remove the sealing member installed in the mounting groove, and a force is applied from the back side to the side facing the sealing member. By operating the sealing member in the mounting groove, the sealing member mounted in the mounting groove can be easily removed and replaced without interference from the substantially columnar insertion tip of the removal jig. Therefore, even when conducting corrosive gas or the like, which requires replacing the sealing member every time it is used, the sealing member can be easily and efficiently replaced and the device can be used safely.

As an aspect of the present invention, the removal jig may be tilted after the insertion tip is inserted into the opening until an over-insertion prevention means for preventing over-insertion of the insertion tip into the opening functions.
According to this invention, if the insertion tip is over-inserted, for example, the insertion tip is inserted into the flow path and the sealing member installed in the mounting groove cannot be tilted to remove the sealing member. Even if the sealing member attached to the mounting groove is tilted to remove it due to the inconvenience that the insertion tip cannot be removed or the amount of insertion of the insertion tip into the opening is too small (hereinafter referred to as underinsertion), the insertion tip It is possible to prevent the occurrence of a problem in which the sealing member cannot be removed due to the sealing member coming off the opening.

Further, as an aspect of the present invention, the over-insertion prevention means is provided at the proximal end of the insertion tip of the removal jig, and is a clarifying means for clearly indicating a position where over-insertion occurs, and the clarifying means is a It may be inserted until it is located at the edge of the opening.

According to the present invention, the sealing member can be reliably removed by visually checking to prevent the insertion tip from being underinserted or overinserted.

Further, as an aspect of the present invention, the over-insertion prevention means is provided at the proximal end of the insertion tip of the removal jig, and when the removal jig is inserted to a position where over-insertion occurs, it comes into contact with the edge of the opening to prevent the over-insertion. The contact regulating portion may be inserted until the contact regulating portion contacts the edge of the opening.
According to the present invention, the insertion position can be regulated by the abutment regulating portion, the insertion tip portion can be prevented from being underinserted or overinserted, and the sealing member can be reliably removed.

Further, as an aspect of the present invention, the insertion tip portion that can be inserted into the opening is formed in a non-insertion shape that cannot be inserted into one end of the flow path, and the insertion tip portion formed in the non-insertion shape prevents the over-insertion. It may also function as a means.

According to this invention, the insertion position can be regulated by the flow path, and under-insertion or over-insertion of the insertion tip can be prevented, and the sealing member can be reliably removed.

The non-insertion shape may be a circular cross-section with a large diameter relative to a flow path having a circular cross-section, an elliptical cross-section with a long diameter, a cross-sectional shape that protrudes in the radial direction in at least a portion of the circumferential direction of the end surface of the insertion tip, or the like. There may be.

According to the present invention, a connection structure connecting a conduction port and a pipe end, and an opening/closing valve device, in which a sealing member that can be placed at an appropriate position in a connected state between the conduction port and the pipe end can be easily replaced. and a method for removing the sealing member.

FIG. 2 is a partially cross-sectional schematic front view of a connection structure between a container valve device and flow path piping. FIG. 2 is a partially cross-sectional schematic explanatory diagram of a connection structure between a container valve device and flow path piping. FIG. 2 is a partially cross-sectional schematic front view of a connection structure between a container valve device and flow path piping. FIG. 2 is a partially cross-sectional schematic front view of a connection structure between a container valve device and flow path piping. FIG. 2 is a partially cross-sectional schematic perspective view of a connection structure between a container valve device and flow path piping. FIG. 3 is a perspective view of a removal jig. FIG. 3 is a partially cross-sectional schematic front view showing a state in which a removal jig is inserted into the gasket attached to the communication port of the container valve device. FIG. 3 is an explanatory diagram of a state in which a gasket attached to a communication port of a container valve device is removed using a removal jig. FIG. 2 is a partial cross-sectional schematic front view of a connection structure between a piping valve device and flow path piping. FIG. 2 is a partial cross-sectional schematic explanatory diagram of a connection structure between a piping valve device and flow path piping. FIG. 2 is a partial cross-sectional schematic front view of a connection structure between a piping valve device and flow path piping. FIG. 2 is a partial cross-sectional schematic front view of a connection structure between a piping valve device and flow path piping. FIG. 7 is a perspective view of another embodiment of a removal jig. FIG. 4 is an explanatory diagram of a state in which a gasket attached to a communication port of a piping valve device is removed using a removal jig. FIG. 4 is an explanatory diagram of a state in which a gasket attached to a communication port of a piping valve device is removed using a removal jig. FIG. 7 is a partially cross-sectional explanatory diagram of a connection structure between a communication port and a flow path piping according to another embodiment.

The connection structure X between the container valve device 1 and the flow path piping 100, which is an embodiment of the present invention, and the removal of the gasket 20 attached to the attachment groove 122 will be described with reference to FIGS. 1 to 8.
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 path piping 100, and FIG. FIG. 5 shows a partial cross-sectional schematic perspective view of the connection structure X between the communication port 12 of the container valve device 1 and the flow path piping 100, and FIG. FIG. 7 shows a perspective view of the tool 200, and FIG. 8 is an explanatory view showing a state in which the gasket 20 attached to the communication port 12 of the container valve device 1 is removed by the removal jig 200.

In addition, in detail, FIG. 1 shows a partial cross-sectional schematic front view of the connection structure X in an exploded state, and FIG. 2 shows a partial cross-section of the connection structure A schematic front view is shown, and FIG. 4 is a partially cross-sectional schematic front view of the connection structure X in a connected state. 1, 2, and 4, a portion of the communication port 12 of the container valve device 1, the gasket 20, and the flow path piping 100 are illustrated as longitudinal cross-sectional views.

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

2 and 5 show perspective views of the conduction port 12, the gasket 20, and the flow path piping 100 from the front, left side, and plane directions. A part of the gasket 20 and the front side of the flow path piping 100 are shown cut away. Further, in FIG. 6, a part of the front side of the support column 202 of the removal jig 200 is shown cut away.

FIG. 7 is a partially cross-sectional schematic front view showing a state in which the support 202 of the removal jig 200 is inserted into the gasket 20 attached to the conduction port 12 of the container valve device 1, and FIG. In FIG. 8, which is an explanatory diagram showing a state in which the attached gasket 20 is removed by the removal jig 200, the communication port 12 of the container valve device 1 and the gasket 20 are illustrated as a longitudinal cross-sectional view.

Note that FIG. 8(a) shows a partial cross-sectional schematic front view of the removal jig 200 tilted in order to remove the gasket 20, and FIG. 8(b) shows the gasket 20 removed by further tilting the removal jig 200. A partially cross-sectional schematic front view of the state is shown.

The container valve device 1 is an on-off valve device that is attached to the upper part of a cylinder container (not shown), is connected to a flow path piping 100 for gas supply and filling, and regulates gas conduction.

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 part of the body 10 to rotate an on-off valve (not shown) provided inside the body 10. There is.
To be more specific, the body main body 10, which is elongated and has a substantially cylindrical shape, is provided with a conduction port 12 that protrudes laterally near the middle stage, and has a cylinder that is screwed into an attachment part (not shown) on the top of the cylinder container. A mounting portion 13 is provided at the bottom.

Further, inside the main body 10, a flow path 14 is provided which communicates with the tip end of the communication port 12 and the lower end of the cylinder attachment part 13. Although not shown in the drawings, a valve chamber is provided in the middle portion of the flow path 14 inside the main body 10 to accommodate a shutoff valve that is opened and closed by rotating the rotary handle 11.

The communication port 12 that protrudes laterally near the middle of the main body 10 has a substantially cylindrical shape with a horizontal channel 14 at the center when viewed from the left side, and is screwed into a cap nut 103 attached to the channel piping 100. A threaded portion 121 is provided.

Further, a mounting groove 122 having a circular concave shape in left side view is provided on the left side of the substantially cylindrical conduction port 12, into which the gasket 20 is mounted. A tapered space 123 having a tapered truncated conical shape is provided from the flow path 14 to the end of the flow path 14 toward the main body 10 side (hereinafter referred to as body side B).

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 that is approximately the same as the outer diameter of the gasket 20 and a depth that is approximately half the thickness of the gasket 20. , an inner circumferential convex portion 126 (see the enlarged view of part a in FIG. 1) is provided that closely contacts the outer circumferential surface of the gasket 20 mounted in the mounting groove 122.
In addition, in the container valve device 1 configured in this way, a residual pressure holding mechanism, a backflow prevention mechanism, a pressure reducing mechanism, a pressure gauge, a safety valve, etc. may be provided as appropriate depending on the specifications.

In the connection structure It has a ring shape when viewed from the side and is mounted in the mounting groove 122, and is made of suitable rubber packing, metal packing, etc. that can exhibit sealing properties and elasticity in the connection structure Composed of materials.
Note that the opening 21 is formed with a diameter that is greater than or equal to the diameter of the flow path 14 and smaller than the tip side F (opposite side to the body side B) of the tapered space 123.

The flow path piping 100, which is connected to the conduction port 12 via the gasket 20 and constitutes the connection structure The piping end 102 is connected to the communication port 12 of the valve device 1 . Note that the end of the flow path piping 100 opposite to the piping 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 has a diameter expanded to approximately the same diameter as the communication port 12 to form a flange shape, and a side surface 102a of the pipe end 102 on the container valve device 1 side has a Although not shown, a sealing groove having a triangular cross section is provided.

Further, a cap nut 103 is attached to the flow path piping 100 so as to be movable in the longitudinal direction. The cap nut 103 attached to the flow path piping 100 so as to be movable in the longitudinal direction is restricted from moving toward the container valve device 1 by the piping end 102 . A threaded portion 104 is formed on the inner surface of the cap nut 103 to be screwed into the threaded portion 121 of the conduction port 12.

Next, a method of configuring the connection structure X by connecting the communication port 12 of the container valve device 1 configured as described above and the pipe end portion 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 mounted in the mounting groove 122 of the conduction port 12. As shown in FIGS. At this time, the gasket 20 that is pushed into the mounting groove 122, which is shallow in depth compared to the thickness of the gasket 20, is mounted on the tip side F of the communication port 12 (the side of the flow path piping 100 and opposite to the body side B). It is attached in such a manner that it protrudes from the surface of the tip toward the distal side F.

At this time, as shown in the enlarged view of part a in FIG. Since they are in close contact with each other so as to be pressed inward, the gasket 20 is prevented from accidentally coming off from the mounting groove 122.

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

Furthermore, the cap nut 103 and the conduction port 12 are further screwed, and the gasket 20 is sandwiched between the groove bottom surface 124 of the conduction port 12 and the side surface 102a of the piping end 102, and the gasket 20 seals the groove bottom surface 124. By tightening to the extent that it bites into the groove 125 and the sealing groove provided on the side surface 102a, the connection between the communication port 12 and the flow path piping 100, which are arranged abutting each other via the gasket 20, is completed, and the connection structure X is formed. That will happen.

The connection structure X in which the conduction port 12 and the flow path piping 100 are connected in this way is such that the gasket 20 attached to the mounting groove 122 is placed at an appropriate position between the conduction port 12 and the flow path piping 100. Can be done. Further, 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, the gasket 20 will not be accidentally removed from the mounting groove 122, and the gasket 20 can be more reliably placed at an appropriate position in the connection structure X.

In addition, since the gasket 20 installed in a manner that protrudes toward the tip 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 sealing groove, a connection with high sealing performance is achieved. Structure X can be constructed. Therefore, even if a highly corrosive gas or the like is conducted, it will not leak and can be used safely.

Although the connection structure When it deteriorates, it needs to be replaced. Next, a removal jig 200 for removing the gasket 20 mounted in the mounting groove 122 in the connection structure X 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 is composed of a cylindrical grip part 201 that is held by a person who replaces the product, and a columnar support part 202 that projects upward from the grip part 201.
The strut portion 202 has a substantially cylindrical shape with an upper portion having a smaller diameter than the root portion, and is provided with clear grooves 204 extending in the circumferential direction from the distal end surface to the proximal end side at a predetermined interval. Note that the tip side of the clear groove 204 is the insertion tip portion 203 . Furthermore, the diameter of the reduced diameter portion of the support column 202, which has a substantially cylindrical shape with the upper diameter reduced compared to the root portion, is smaller than the diameter of the opening 21 of the gasket 20.

In order to remove the gasket 20 installed in the mounting groove 122 using the removal jig 200 configured as described above, the removal jig 200 is moved along the direction in which the flow path 14 extends with respect to the communication port 12. That is, it is arranged in a direction perpendicular to the gasket 20 in the longitudinal section. Then, the insertion tip 203 is inserted into the opening 21 of the gasket 20 on the body side B. At this time, the clear groove 204 is inserted to a position along the edge of the tip side F of the opening 21 of the gasket 20.

In this state, the removal jig 200 is tilted as shown in FIG. 8(a). Specifically, the distal end side F of the removal jig 200, which is disposed along the extending direction of the flow path 14 and inserted into the body side B, is removed by moving it downward, for example, as shown by the arrow m. Tilt the jig 200. As a result, the removal jig 200 is tilted so that the insertion tip 203 passes through the opening 21 of the gasket 20 toward the body side B and comes into contact with the edge of the opening 21 of the gasket 20 on the body side B. At this time, the tip of the insertion tip 203 is inserted into the tapered space 123 as shown in FIG. Accordingly, interference with the inner surface of the flow path 14 can be prevented.

In this state, by further moving the gripping part 201 in the direction of arrow m (see FIG. 8), the force input from the gripping part 201 is transferred to the support part 202 that contacts the corner of the opening edge of the opening 21 as a fulcrum. As a result, a force on the distal end side F acts on the insertion distal end portion 203 due to the lever principle.

Therefore, the insertion tip 203 inserted into the tapered space 123 applies a force on the tip side F to the gasket 20 on the tip side F of the insertion tip 203, and the gasket 20 on which the force on the tip side F acts is pushed out by the insertion tip 203 and the gasket 20 can be removed from the mounting groove 122.

As described above, the passage port 12, which is one end of the passage 14 in the container valve device 1, which has an on-off valve that switches opening and closing in the middle part of the passage 14 through which gas conducts, and the piping of the passage piping 100 through which gas conducts. In the connection structure X with the end portion 102, the conduction port 12 and the piping end portion 102 are arranged to butt each other, and a substantially columnar insertion tip of the removal jig 200 is provided between the conduction port 12 and the piping end portion 102. A ring-shaped gasket 20 having an opening 21 through which a gasket 203 can be inserted is disposed, a mounting groove 122 into which the gasket 20 is mounted is formed in the conduction port 12, and the gasket 20 is mounted in the mounting groove 122. The removal jig 200 with the insertion tip 203 inserted into the opening 21 is placed on the body side B, which is the side opposite to the side facing the section 102, to prevent interference with the insertion tip 203 when the removal jig 200 is tilted to remove the gasket 20. Since the tapered space 123 is provided to prevent this, the gasket 20, which can be placed at an appropriate position when the communication port 12 and the pipe end 102 are connected, can be easily removed and replaced.

To be more specific, the communication port 12, which is one end of the flow path 14 in the container valve device 1, which has an on-off valve that switches opening and closing in the middle part of the flow path 14 through which the gas flows, and the piping end of the flow path piping 100 through which the gas flows. In the connection structure It can be placed securely.

Furthermore, by providing the tapered space 123 on the body side B, which is the side opposite to the side facing the piping end 102 in the installed state in which the gasket 20 is installed in the installation groove 122, the insertion tip 203 is inserted into the opening 21. In order to remove the gasket 20 installed in the installation groove 122, the removal jig 200 inserted into the installation groove 122 is tilted in the direction of arrow m, and a force is applied to the gasket 20 from the body side B toward the tip side F. The gasket 20 mounted in the mounting groove 122 can be easily removed and replaced without interference from the substantially columnar insertion tip 203 of the removal jig 200.

Therefore, even if the gasket 20 is to be replaced every time a corrosive gas is conducted, the gasket 20 can be replaced easily and efficiently, and the gasket 20 can be used safely.
Furthermore, since the insertion tip 203 is inserted into the opening 21, the removed gasket 20 is fitted onto the insertion tip 203, which can prevent the gasket 20 from flying off and being lost, for example.

Further, since the mounting groove 122 and the tapered space 123 are formed in the communication port 12, the replaceability of the gasket 20 can be improved.
To be more specific, compared to the case where the mounting groove 122 and the tapered space 123 are provided in the piping end 102 of the fixed flow path piping 100, the mounting groove 122 and the tapered space 123 are provided in the communication port 12 of the container valve device 1, which is easier to remove and move. By providing the tapered 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 a tapered space 123 is provided on the radially inner side of the mounting groove 122 to which the gasket 20 is mounted and on the body side B. Therefore, when the communication port 12 and the pipe end 102 are connected, the gasket 20 installed in the mounting groove 122 can reliably seal the connection state, and the gasket 20 installed in the mounting groove 122 can be removed using a removal jig.

Specifically, by having the groove bottom surface 124 in the mounting groove 122 that contacts the gasket 20 with a predetermined pressure-receiving area, the gasket 20 can be pressurized and securely sealed without causing unintended deformation in the above-mentioned connected state. can do.

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

In addition, the insertion tip 203 is inserted into the opening 21 until the clear groove 204 that prevents the insertion tip 203 from being overinserted into the opening 21 functions, and then the removal jig 200 is tilted. For example, when the insertion tip 203 is inserted into the flow path 14 and cannot be tilted to remove the gasket 20 attached to the mounting groove 122, the gasket 20 cannot be removed. Even if the insertion amount is too small and the gasket 20 mounted in the mounting groove 122 is tilted to remove it, the insertion tip 203 comes off from the opening 21 and the problem that the gasket 20 cannot be removed can be prevented.

Further, the clear groove 204 is provided at the base end of the insertion tip 203 of the removal jig 200, and in order to clearly indicate the position of over-insertion, if the clear groove 204 is inserted until it is located at the edge of the opening 21, Under-insertion or over-insertion of the insertion tip portion 203 can be prevented by visual inspection, and the gasket 20 can be removed reliably.

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

Below, the connection structure Xa that connects the piping valve device 1a and the flow path piping 100 will be explained with reference to FIGS. 9 to 15.
9, FIG. 11, and FIG. 12 show partially cross-sectional schematic front views of the connection structure Xa between the piping valve device 1a and the flow path piping 100, and FIG. 10 shows the connection structure between the piping valve device 1a and the flow path piping 100. 13 shows a perspective view of the removal jig 200a, and FIGS. 14 and 15 show the removal jig 200a of the gasket 20 attached to the communication port 12a of the piping valve device 1a. An explanatory diagram of a removed state is shown.

In addition, FIG. 9 shows a partially cross-sectional schematic front view of the connecting structure Xa in an exploded state, and FIG. 11 is a partially cross-sectional schematic front view of the connecting structure Xa in a state where the gasket 20 is attached to the communication port 12a of the piping valve device 1a. FIG. 12 shows a partially cross-sectional schematic front view of the connection structure Xa in a connected state. 9, FIG. 11, and FIG. 12, a portion of the communication port 12a of the piping valve device 1a, the gasket 20, and the flow path piping 100 are illustrated as longitudinal cross-sectional views.

Moreover, FIG. 10(a) shows a partial cross-sectional schematic perspective view of the state before the gasket 20 is attached to the communication port 12a of the piping valve device 1a, and FIG. FIG. 5 shows a partial cross-sectional schematic perspective view of the connecting structure Xa in a connected state.

FIG. 10 shows perspective views of the conduction port 12a, the gasket 20, and the flow path piping 100 from the front, left side, and plane directions. A part of the front side of the pipe 100 is shown cut away.
Further, in FIG. 13, a part of the front side of the support portion 202a of the removal jig 200a is shown cut away.

FIG. 14(a) shows a partial cross-sectional schematic perspective view of the piping valve device 1a in which the removal jig 200a is placed on one of the two communication ports 12a fitted with the gasket 20, and FIG. 14(b) shows A partially cross-sectional schematic perspective view showing a state where the insertion tip 203a of the removal jig 200a is inserted into the opening 21 of the gasket 20 attached to the conduction port 12a.

FIG. 14(c) shows a partial cross-sectional schematic perspective view of the removal jig 200a with the insertion tip 203a inserted into the opening 21 of the gasket 20 in an inclined state, and FIG. 14(d) shows the removal jig 200a further removed. A partial cross-sectional schematic perspective view of the gasket 20 with the gasket 20 removed at an angle is shown.

Unlike the above-described container valve device 1 that is attached to the upper part of a cylinder container and regulates gas conduction, the piping valve device 1a is disposed between flow path piping 100 and gas flows through the conduction space 101 of the flow path piping 100. This is an on-off valve device that regulates gas conduction.

In the following description, the same reference numerals will be used for the same components as those in the connection structure X that connected the container valve device 1 and the flow path piping 100 described above, and detailed description thereof will be omitted.
Unlike the container valve device 1, which includes a body main body 10 having a cylinder attachment part 13 attached to a cylinder container at the lower part and a communication port 12 projecting laterally from near the middle stage, the piping valve device 1a has a main body 10a. The two conductive ports 12a protrude to both sides so as to be in a straight line in a plan view, forming a body main body 10a that is in an inverted T-shape in a front view.

Inside the body main body 10a configured in this way, a flow path 14 is formed that connects the ends of both the communication ports 12a. The rest of the configuration is the same as that of the container valve device 1, so a detailed explanation will be omitted.

The conduction port 12a of the body main body 10a configured in this manner has a ring-shaped space one size smaller than the mounting groove 122 instead of the truncated conical tapered space 123 on the body side B of the conduction port 12. A ring-shaped space 123a is provided. The other configurations of the conduction port 12a are the same as the configuration of the conduction port 12, so the description thereof will be omitted.

In the connection structure Xa configured by connecting the piping valve device 1a configured in this way to the flow path piping 100, first, the gasket 20 is installed in the installation groove 122 of the communication port 12a (see FIGS. 9 to 11).
Then, with the cap nut 103 shifted to expose the pipe ends 102, the pipe valve device 1a is arranged between the pipe ends 102 of the flow path pipes 100 arranged at a predetermined interval.

The communication ports 12a of the piping valve device 1a arranged between the piping ends 102 of the flow path piping 100 arranged at a predetermined interval face each piping end 102, and are butted together with a gasket 20 interposed therebetween. In this state, by screwing together the cap nut 103 of the flow path piping 100 and the threaded portion 121 of the conduction port 12a, the respective conduction ports 12a and the flow path piping 100 are connected, forming the connection structure Xa. can do.

Next, a description will be given of a removal jig 200a for removing the gasket 20 mounted in the mounting groove 122 in the connection structure Xa configured as described above, and a method of removing the gasket 20 using the removal jig 200a.
As shown in FIG. 6, the removal jig 200a is composed of a cylindrical grip part 201a that is held by a person who replaces it, and a cylindrical support part 202a that projects upward from the grip part 201a.

The strut portion 202a has a substantially cylindrical shape with a diameter reduced at the top compared to the base portion, and the reduced diameter portion is an insertion tip portion 203a, and a portion between the strut portion 202a and the insertion tip portion 203a is formed toward the tip side. The contact regulating portion 204a has a diameter that gradually decreases. Further, the diameter of the insertion tip 203a is smaller than the diameter of the opening 21 of the gasket 20.

To remove the gasket 20 installed in the mounting groove 122 using the removal jig 200a configured as described above, as shown in FIG. 14, that is, in a longitudinal section, in a direction perpendicular to the gasket 20. Then, the insertion tip 203a is inserted into the opening 21 of the gasket 20 on the body side B. At this time, as shown in FIG. 14(b), the gasket 20 is inserted until the abutment regulating part 204a abuts against the edge of the distal end side F of the opening 21 of the gasket 20.

In this state, the removal jig 200a is tilted as shown in FIG. 15(a). Specifically, the distal end side F of the removal jig 200a, which is disposed along the extending direction of the flow path 14 and inserted into the body side B, is removed by moving it downward, for example, as shown by the arrow m. Tilt the jig 200a. As a result, the removal jig 200a is tilted so that the insertion tip 203a passes through the opening 21 of the gasket 20 toward the body side B and comes into contact with the edge of the opening 21 of the gasket 20 on the body side B. At this time, the tip of the insertion tip 203a is inserted into the ring-shaped space 123a as shown in FIG. Accordingly, interference with the inner surface of the flow path 14 can be prevented.

In this state, by further moving the gripping part 201a in the direction of arrow m (see FIG. 15(b)), the force input from the gripping part 201a is applied to the corner of the opening edge of the opening 21. Using the regulating portion 204a as a fulcrum, a force on the distal end side F acts on the insertion distal end portion 203a according to the principle of leverage.

Therefore, the insertion tip 203a inserted into the ring-shaped space 123a applies a force on the tip side F to the gasket 20 on the tip side F of the insertion tip 203a, and the gasket 20 on which the force on the tip side F acts is pushed out by the insertion tip 203a, and the gasket 20 can be removed from the mounting groove 122.

The connection structure Xa configured in this manner can have the same effect as the connection structure X configured by connecting the communication port 12 and the flow path piping 100.
Further, the contact regulating portion 204a is provided at the proximal end of the insertion tip portion 203a of the removal jig 200a, and is configured to come into contact with the edge of the opening 21 to regulate when the insertion reaches a position where over-insertion occurs. By inserting the contact regulating portion 204a until it contacts the edge of the opening 21, the insertion position can be regulated by the contact regulating portion 204a, preventing the insertion tip portion 203a from being underinserted or overinserted, and the gasket 20 is It can be safely removed.

Note that, since the insertion tip 203a described above is formed to have a larger diameter than the inner diameter of the flow path 14, the length of the insertion tip 203a is made long, so that the contact regulating portion 204a comes into contact with the edge of the opening 21. The insertion tip 203a may be configured to prevent over-insertion of the insertion tip 203a by first coming into contact with the end of the ring-shaped space 123a on the body side B. In this case, even without the contact regulating part 204a, the above-mentioned effect can be achieved by inserting the insertion tip 203a until it comes into contact with the end of the body side B, that is, the end of the tip side F of the flow path 14. be able to.

Furthermore, in the above description, the connection structures X and Xa that connect to the flow path piping 100 having the piping end 102 at the end have been described. The connection structure Xb may be configured by connecting to the flow path piping 100b provided with the fitting convex portion 105 on the distal end side, and this case will be described with reference to FIG. 16.
In addition, also in the following description, the same code|symbol is used about the same structure as the structure of the connection structure X which connected the above-mentioned container valve apparatus 1 and the flow path piping 100, and the detailed description is abbreviate|omitted.

As shown in FIG. 16, a fitting convex portion 105 that protrudes beyond the piping end portion 102 is provided at the tip of the flow path piping 100b. The fitting convex portion 105 has a smaller diameter than the outer diameter of the flow path piping 100b. When the channel piping 100b provided with the fitting protrusion 105 protruding toward the tip side from the pipe end 102 is connected to the conventional communication port 12 or the communication port 12a, the fitting protrusion 105 interferes with the connection. Can not do it.

Therefore, although the communication port 12b constituting the connection structure Xb connected to the flow path piping 100b is provided with a mounting groove 122 like the communication port 12 and the communication port 12a, there is a tapered space between the flow path 14 and the mounting groove 122. 123 and a ring-shaped space 123a, in the communication port 12b, a tapered space 123b is provided in the mounting groove 122, and between the tapered space 123b and the flow path 14, A fitting convex housing space 127 for accommodating the fitting convex 105 is provided.

In other words, the conduction port 12 and the conduction port 12a are arranged in the order of the mounting groove 122, the tapered space 123 or the ring-shaped space 123a, and the flow path 14 from the tip side F toward the body side B. 12b, the mounting groove 122, the tapered space 123b, the fitting convex housing space 127, and the flow path 14 are arranged in this order. In other words, the tapered space 123b is formed between the mounting groove 122 and the fitting convex housing space 127.

The communication port 12b configured in this manner may be provided in any of a container valve device such as the container valve device 1 or a piping valve device such as the piping valve device 1a, and may be provided in a ring instead of the tapered space 123b. It may be configured with a ring-shaped space similar to the shaped space 123a.

Further, the gasket 20b used in the connection structure Xb has an opening 21b having a larger diameter than the opening 21 of the gasket 20 used in the connection structure X and the connection structure Xa, through which the fitting convex portion 105 can be inserted. Therefore, the diameter of the tip side F of the tapered space 123b is also larger than the diameter of the tip side F of the tapered space 123.

The connection structure Xb configured by connecting the conduction port 12b, the gasket 20b, and the flow path piping 100b configured in this way is a connection structure configured by connecting the container valve device 1 having the conduction port 12 and the flow path piping 100. It is possible to achieve the same effects as the structure X and the connection structure Xa configured by connecting the piping valve device 1a provided with the communication port 12a and the flow path piping 100.

Furthermore, as shown in FIGS. 8 and 15, the gasket 20b installed in the mounting groove 122 of the conduction port 12b configured as described above is also removed by the procedure for removing the gasket 20 installed in the installation groove 122 of the conduction port 12 or the conduction port 12a. It can be removed using the removal jig 200 in the same procedure as above.

In the correspondence between the structure of this invention and the above-described embodiments, the fluid of this invention corresponds to gas,
Similarly below,
The flow path corresponds to the flow path 14,
The opening/closing valve device corresponds to the container valve device 1,
The conduction ports correspond to the conduction ports 12, 12a, and 12b,
The flow path piping corresponds to the flow path piping 100, 100b,
The pipe end corresponds to the pipe end 102,
The connection structure corresponds to connection structure X, Xa, Xb,
The opening corresponds to the openings 21 and 21b,
The sealing member corresponds to the gaskets 20, 20b,
The mounting groove corresponds to the mounting groove 122,
The back side corresponds to body side B,
The removal jig corresponds to removal jig 200,
The insertion tip corresponds to the insertion tip 203, 203a,
The interference prevention space corresponds to the tapered spaces 123, 123b or the ring-shaped space 123a,
The contact surface corresponds to the groove bottom surface 124,
The over-insertion prevention means corresponds to the clear groove 204 and the contact regulating portion 204a,
The clarifying means corresponds to the clarifying groove 204,
The contact regulating portion corresponds to the contact regulating portion 204a or the elongated insertion tip portion 203a, but the present invention is not limited to the configuration of the above-described embodiments, and can be applied to many embodiments. Obtainable.
For example, in the above description, gas is used as the fluid, but it may be a liquid or a gel.

In the above explanation, the mounting groove 122 is provided in the conduction port 12, but the mounting groove may be provided in the pipe end 102, or in addition to the mounting groove 122 provided in the conduction port 12, the mounting groove 122 may also be provided in the pipe end 102. A groove may also be provided. In this way, when providing a mounting groove in the pipe end 102 in addition to the mounting groove 122 provided in the conduction port 12, the grooves are formed in the same shape, the gasket 20 is mounted on either one, and the connection is made. The gasket 20 may be fitted into the other mounting groove in the connected state, or the gasket 20 may be fitted in one of the mounting grooves as the main mounting groove, and in the connected state, the gasket 20 may be fitted into the other mounting groove. It is also possible to adopt a mode in which the gasket 20 is fitted into.

Further, in the above description, the tapered spaces 123, 123b provided on the body side B of the mounting groove 122 are approximately truncated conical spaces, and the ring-shaped space 123a is a ring-shaped space, that is, in the circumferential direction in the left side view. Although the space is formed as a continuous space, the space may be formed in a part in the circumferential direction of the circumferentially recessed mounting groove 122 into which the gasket 20 is mounted, or may be formed in a plurality of locations. Furthermore, it may be a space formed on the body side B of the opening 21 formed to have a small diameter with respect to the large diameter flow path 14.

Furthermore, in the above description, the insertion tip portions 203, 203a are formed in a cylindrical shape, but they may be formed in a polygonal shape such as a hexagonal cross section, or an elliptical columnar shape, or the diameter may be slightly changed. .

Furthermore, although the removal jig 200 is configured such that the insertion tip 203 protrudes from the upper end of the support 202 to both sides, for example, the insertion tip 203 may be shaped like a generally L-shape when viewed from the front in such a manner that the insertion tip 203 protrudes only in one direction. It may be formed as follows. In this case, it is preferable that the length from the tip of the insertion tip 203 to the opposite end of the support column 202 be longer than the diameter of the openings 21, 21b of the gaskets 20, 20b.

1... Container valve device 1a... Piping valve device 12, 12a, 12b... Conduction port 14... Channel 20, 20b... Gasket 21, 21b... Opening 100, 100b... Channel piping 102... Piping end 122... Mounting groove 123, 123b... Tapered space 123a... Ring-shaped space 124... Groove bottom surface 200, 200a... Removal jig 203, 203a... Insertion tip 204... Explicit groove 204a... Contact regulation part B... Body side X, Xa, Xb... Connection structure

Claims (10)

A connection structure in which a conduction port, which is one end of the flow path, in an on-off valve device having an on-off valve that switches opening and closing in an intermediate portion of a flow path through which fluid conducts, and a pipe end of flow path piping through which the fluid conducts. And,
The conduction port and the piping end are arranged to butt each other, and
A ring-shaped sealing member having an opening through which a substantially columnar insertion tip of a removal jig can be inserted is disposed between the conduction port and the pipe end;
A mounting groove for mounting the sealing member is formed in at least one of the conduction port and the pipe end,
In the installed state in which the sealing member is installed in the installation groove, on the back side that is opposite to the side facing the other of the conduction port and the piping end,
A connection structure provided with an interference prevention space that prevents interference with the insertion tip when the removal jig with the insertion tip inserted into the opening is tilted to remove the sealing member. The connection structure according to claim 1, wherein the mounting groove and the interference prevention space are formed in the communication port. The mounting groove has a contact surface that contacts the sealing member in a predetermined pressure receiving area, and
The interference prevention space is
The connection structure according to claim 2, wherein the sealing member is provided on the radially inner side of the mounting groove and on the back surface side. In addition to having an on-off valve that switches opening and closing in the middle part of the flow path through which fluid flows,
one end of the flow path is a conduction port that butts and connects to a piping end of a flow path piping through which the fluid conducts;
A mounting groove for mounting a ring-shaped sealing member having an opening through which a substantially columnar insertion tip of the removal jig can be inserted is provided in the conduction port;
In the installed state in which the sealing member is installed in the installation groove, the removal jig with the insertion tip inserted into the opening is placed on the back side, which is the side opposite to the side facing the pipe end. An opening/closing valve device provided with an interference prevention space that prevents interference with the insertion tip when the sealing member is tilted to remove it. The mounting groove has a contact surface that contacts the sealing member in a predetermined pressure receiving area, and
The interference prevention space is
5. The on-off valve device according to claim 4, wherein the sealing member is provided on the radially inner side of the mounting groove and on the back surface side. A connection structure in which a conduction port, which is one end of the flow path, in an on-off valve device having an on-off valve that switches opening and closing in an intermediate portion of a flow path through which fluid conducts, and a pipe end of flow path piping through which the fluid conducts. A sealing member removal method for removing a sealing member installed in a mounting groove formed in at least one of the conduction port and the pipe end, the method comprising:
In the installed state in which the sealing member is installed in the installation groove, removal is performed by inserting the insertion tip into the opening on the back side that is opposite to the side facing the other of the conduction port and the piping end. An interference prevention space is provided to prevent interference with the insertion tip when the jig is tilted to remove the sealing member,
Removing the sealing member by tilting the removal jig with the insertion tip inserted into the opening of the sealing member installed in the installation groove with respect to the insertion direction to remove the sealing member from the installation groove. Method. The sealing member according to claim 6, wherein the insertion tip is inserted into the opening until an overinsertion prevention means for preventing overinsertion of the insertion tip into the opening functions, and then the removal jig is tilted. How to remove. The over-insertion prevention means is provided at the proximal end of the insertion tip of the removal jig, and is a clarifying means for clearly indicating a position where over-insertion occurs;
8. The method for removing a sealing member according to claim 7, wherein the revealing means is inserted until it is located at the edge of the opening. The over-insertion prevention means is an abutment regulating part that is provided at the proximal end of the insertion tip of the removal jig and that comes into contact with the edge of the opening to restrict when the removal jig is inserted to a position where over-insertion occurs. ,
8. The method for removing a sealing member according to claim 7, wherein the sealing member is inserted until the contact regulating portion contacts an edge of the opening. The insertion tip that can be inserted into the opening is formed in a non-insertion shape that cannot be inserted into one end of the flow path,
8. The method for removing a sealing member according to claim 7, wherein the insertion tip portion formed in the non-insertion shape functions as the over-insertion prevention means.

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