JP2008185148A - Gas container valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas container valve device wherein a check valve provided in a gas filling passage can be forcibly opened with simple operation, and the cancelling of a forcible valve opening condition reliably restores a forcible valve opening member into a stand-by position to prevent early wear damage. <P>SOLUTION: The check valve 19 is provided in the gas filling passage 26 in a housing. A mounting hole 27 is provided for a valve opening means in communication with a check valve chamber 22, and a forcible valve opening member 28 is inserted into the mounting hole 27 in a tightly slidable manner. The forcible valve opening member 28 is moved forward or backward in the mounting hole 27 so as to be changed over between an operation position for forcibly opening the valve of a check member 23 and a stand-by position X for cancelling the forcible opening of the valve of the check member 23. A restoring spring 35 is provided for energizing the forcible valve opening member 28 from the operation position to the standby position X. A piston portion 29 is provided on the forcible valve opening member 28, and a valve opening pressure-receiving chamber 30 is formed on the single side of the piston portion 29. Operating fluid flows into the valve opening pressure-receiving chamber 30 to change over the forcibly valve opening member 28 from the stand-by position X into the operation position with fluid pressure in the valve opening pressure-receiving chamber 30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a valve device that is mounted on a gas container containing compressed gas or liquefied gas and used for gas extraction and filling. More specifically, the check valve provided in the gas filling passage is forced by simple operation. The valve device for the gas container can open the valve automatically, and if the forced valve open state is canceled, the forced valve opening means can be reliably returned to the standby position, and early wear and damage of the forced valve opening means can be prevented. About.

  In general, this type of valve device for a gas container is provided with a gas filling path in a housing and a check valve for preventing a flow from the internal space of the gas container to the gas filling port in the gas filling path. (For example, refer to Patent Document 1).

  That is, in this prior art, for example, as shown in FIG. 12, a shutoff valve (65) is provided between a gas inlet (63) and a gas outlet (64) in a housing (62) of a gas container valve device (61). A gas filling passage (68) that connects the gas filling port (66) that is also used as the gas outlet (64) to the internal space (A) of the gas container (67) is provided with the above-described closing valve (65). Are provided in parallel. The gas filling path (68) is provided with a check valve (69) for preventing the flow from the internal space (A) to the gas filling port (66). The stored gas in the gas container (67) is taken out from the gas outlet (64) by opening the closing valve (65). When filling the emptied gas container (67) with fresh gas, close the shut-off valve (65) and connect a gas filling device to the gas filling port (66). High pressure fresh gas is supplied from the filling port (66). The check valve (69) is opened by the pressure of the fresh gas, whereby the fresh gas is filled into the internal space (A) of the gas container (67) through the gas filling passage (68). .

  Usually, in the evacuated gas container, the remaining gas in the internal space and the gas flow path is evacuated from the gas filling port prior to the filling of the fresh gas. Therefore, the valve device is provided with a forced valve opening means for forcibly opening the check valve.

  That is, in the housing (62), a valve opening means mounting hole (71) communicating with the check valve chamber (70) of the check valve (69) via the gas filling path (68). Is provided. A rod-like forced valve opening means (72) is inserted into the mounting hole (71) so as to be slidably closed. The first end (73) of the forced valve opening means (72) is connected to the above-mentioned check. It faces the check member (74) inserted into the valve chamber (70) so as to be able to contact and separate. The forced valve opening means (72) can move back and forth within the mounting hole (71). When the gas is taken out or filled, the forced valve opening means (72) moves backward from the check valve (69) side as shown in FIG. 62) is switched to the standby position (X) supported by the receiving portion (75) formed in the above. When evacuating, as shown in FIG. 13, the operating tool (76) is inserted into the mounting hole (71) and pushed into the check valve (69) to advance to the check member. The operating position (Y) is forcibly opened (74).

JP-A-8-159597

  After removing the pushing force by the operating tool (76), the forced valve opening means (72), by the frictional force of the seal member (77) sliding with the inner surface of the mounting hole (71), It stops at the intermediate position between the operating position (Y) and the standby position (X). For this reason, when fresh gas is supplied from the gas filling port (66) after the evacuation operation, the forced valve opening means (72) receives the high pressure of the fresh gas and rapidly moves to the standby position (X). Since it is returned, it strikes the receiving part (75) and receives an impact load, which may cause deformation or wear or damage. Further, when fresh gas is supplied in a state where the operation tool (76) is inserted into the mounting hole (71), the operation tool (76) is moved by the rapid movement of the forced valve opening means (72). There is also a risk of being thrown away outward.

  The present invention solves the above-mentioned problems, and can forcibly open the check valve provided in the gas filling path with a simple operation, and if the forced valve open state is canceled, the forced valve opening means is reliably moved to the standby position. An object of the present invention is to provide a gas container valve device that can be restored to the initial position and prevent early wear and breakage of the forced valve opening means.

In order to solve the above-described problems, the present invention is configured as follows, for example, based on FIGS. 1 to 11 showing an embodiment of the present invention.
That is, the present invention relates to a valve device for a gas container. In the housing (2), a gas filling passage (26) for communicating the gas filling port (25) to the internal space (A) of the gas container (3) is provided. A check valve (19) for blocking the flow from the internal space (A) to the gas filling port (25) is provided in the filling passage (26), and the check valve chamber (22) of the check valve (19) is provided. The gas container valve device is provided with forced valve opening means (28) for forcibly opening the check member (23) inserted into the valve opening means mounting hole (27). Provided in communication with the valve chamber (22), the forced valve opening means (28) is inserted into the mounting hole (27) slidably, and the forced valve opening means (28) is mounted as described above. An operating position (Y) for forcibly opening the check member (23) by moving it back and forth in the hole (27), and a standby position for releasing the forcible valve opening of the check member (23) (X) can be switched to and this forced valve opening means (28) Turned position (Y) waits side position in that it comprises (X) return spring for biasing the side (35), characterized.

  The above-mentioned forced valve opening means is configured such that the check valve is forcibly opened by a simple operation of switching from the standby position to the operating position, and the residual gas in the internal space of the gas container is evacuated from the gas filling port. Is discharged. When the evacuation operation is completed and the check valve is released by the forced valve opening means, the forced valve opening means is urged by the elastic force of the return spring, and the standby position is Can be switched to.

  The mounting hole is provided on the opposite side of the check member from the open end of the gas filling passage that opens to the check valve chamber, and the forced valve opening means is fixed to the check member. can do. In this case, the check member is opened by the pressure of the fresh gas, and the forced opening means is moved to the operating position side. At the same time, the forced opening means is biased to the standby position side by the elastic force of the return spring. Therefore, even if it receives a high pressure of fresh gas, the moving speed is buffered, and rapid movement of the check member and the forced valve opening means is prevented.

Further, in this case, the forced valve opening means is pressed to the operating position side by the pressure of the fresh gas. Therefore, even if the fresh gas filling operation is started as it is after moving to the operating position at the time of evacuation, The forced valve opening means does not move due to the gas pressure. For this reason, early deformation, wear, and breakage of the forced valve opening means can be more effectively prevented, and vacuuming and gas filling can be easily and continuously operated.
In addition, when fresh gas is charged with the forced valve opening means moved to the operating position, the check member opens against the biasing force of the check spring that presses the check member toward the valve closing side. Since the valve moves, it is more preferable that the fresh gas filling pressure is prevented from being lowered by the differential pressure due to the check spring.

  The operation for switching the forced valve opening means from the standby position to the operating position may be performed manually. In this case, a holding means for holding the forced valve opening means in the operating position is provided in the forced valve opening means. It is preferable. On the other hand, the forced valve opening means is provided with a piston portion that tightly slides with the inner surface of the mounting hole, a valve opening pressure receiving chamber is formed on one side of the piston portion, and the working fluid is supplied to the valve opening pressure receiving chamber. When configured so that the forced valve opening means is switched from the standby position to the operating position by the fluid pressure in the valve-opening pressure receiving chamber, the operation fluid can be simply introduced into the valve-opening pressure receiving chamber. It is preferable that the check valve can be automatically opened by simple operation.

  The mounting hole communicates with the check valve chamber through the gas filling passage, and the first end of the forced valve opening means inserted into the mounting hole is in contact with the check member. It can be made to come apart.

In this case as well, the forced valve opening means may be manually moved from the standby position to the operating position, but the forced valve opening means is provided with a piston portion that tightly slides with the inner surface of the mounting hole, A valve-opening pressure receiving chamber is formed on one side of the piston portion so that the working fluid can flow into the valve-opening pressure-receiving chamber, and the forced valve-opening means is moved from the standby position to the operating position by the fluid pressure in the valve-opening pressure-receiving chamber. It is preferable that the check valve can be automatically opened by a simple operation that allows the working fluid to flow into the valve-opening pressure receiving chamber.
In addition, when the forced valve opening means is pressed to the operating position side by the pressure of the working fluid, the above valve opening is performed when the forced valve opening means at the operating position receives the pressure of fresh gas and moves to the standby position. Rapid movement is buffered by the fluid pressure in the pressure receiving chamber. For this reason, since it can prevent receiving a shocking load in the receiving part of a housing, and vacuum operation and gas filling can be operated easily and continuously, it is more preferable.

Since the present invention is configured and operates as described above, the following effects can be obtained.
That is, even if fresh gas is supplied from the gas filling port after the evacuation operation, the forced valve opening means does not move rapidly due to the high pressure of the fresh gas. The impact valve is not impacted by hitting the stopper or the like, and early deformation, wear, or breakage of the forced valve opening means can be satisfactorily prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of the present invention, FIG. 1 is a partially broken view of a valve device for a gas container, FIG. 2 is a sectional view of a check valve in a closed state, and FIG. It is sectional drawing of a non-return valve.

  As shown in FIG. 1, in this gas container valve device (1), a leg screw part (2a) provided at a lower part of a housing (2) is screwed and fixed to a neck part (3a) of a gas container (3). . A gas inlet (4) is opened on the lower surface of the leg screw portion (2a). The housing (2) is provided with an outlet nozzle (5) projecting laterally from a height portion on the way, and a gas outlet (6) is opened on the outer end surface of the outlet nozzle (5).

  In the housing (2), the inlet passage (7) and the closing valve chamber (9) of the closing valve (8) and the outlet passage (10) are provided between the gas inlet (4) and the gas outlet (6). ) Are formed in order, and a closing valve seat (11) is formed around the end of the inlet passage (7) opening to the closing valve chamber (9). A closing member (12) is inserted into the closing valve chamber (9) so as to be movable up and down, and the closing member (12) is attached to the closing valve seat (11) by a spindle (13) and an operation handle (14). On the other hand, the door is opened and closed.

  A cassette cylinder (15) is fitted in the outlet nozzle (5), and a residual pressure holding valve (16) is mounted in the cassette cylinder (15). The outlet passage (10) communicates the shut-off valve chamber (9) with the gas outlet (6) through the residual pressure holding valve (16).

  The housing (2) has a boss part (17) protruding at a position different from the outlet nozzle (5), and a lid bolt (18) is screwed and fixed to the boss part (17). A check valve (19) is attached to the lid bolt (18). That is, a communication path (20) is provided between the shut-off valve chamber (9) and the inlet passage (7), and a check valve seat (21) and a check valve chamber ( 22). The check member (23) inserted into the check valve chamber (22) is urged toward the check valve seat (21) by the check spring (24), and the check member (23) The check valve (19) is closed by contacting the seat (21).

  The gas outlet (6) also serves as a gas filling port (25), and the gas filling passage (26) for connecting the gas filling port (25) to the internal space (A) of the gas container (3) is the outlet described above. The passage (10), the shut-off valve chamber (9), the check valve chamber (22), the communication passage (20), and the inlet passage (7) are composed of a gas outlet (6), a gas inlet (4), Is provided in parallel with the closing valve seat (11). The check valve (19) provided in the gas filling passage (26) prevents the flow from the internal space (A) to the gas filling port (25).

  As shown in FIGS. 2 and 3, the lid bolt (18) has an opening end of the gas filling passage (26) opened to the check valve chamber (22) and the check member ( On the opposite side of 23), a valve opening means mounting hole (27) is provided in communication with the check valve chamber (22). A rod-like forced valve opening member (28) formed integrally with the check member (23) is inserted into the mounting hole (27) so as to be slidable. The forced valve opening member (28) is moved back and forth in the mounting hole (27) to be switched between the standby position (X) shown in FIG. 2 and the operating position (Y) shown in FIG. When the forced valve opening member (28) is switched to the operating position (Y), the check member (23) is forcibly opened, and when the forced valve opening member (28) is switched to the standby position (X), the check member ( The forced opening of 23) is released. In this first embodiment, the forced valve opening member (28) is formed integrally with the check member (23). However, in the present invention, the forced valve open member (28) and the check member (23) are separated. They may be formed and fixed together.

  The forced valve opening member (28) is provided with a piston portion (29) that slides tightly on the inner surface of the mounting hole (27), and a check valve chamber (22) of the piston portion (29). A valve opening pressure receiving chamber (30) is formed on the side. Between the valve-opening pressure receiving chamber (30) and the outer peripheral surface of the lid bolt (18), a fluid introduction path (31) for allowing the working fluid to flow into the valve-opening pressure-receiving chamber (30) is formed. It is. A working fluid supply tool (32) can be detachably fitted to the lid bolt (18), and a supply path (33) of the working fluid supply tool (32) communicates with the fluid introduction path (31). I have to do it. Further, between the cap (34) attached to the end of the lid bolt (18) and the piston part (29), the forced valve opening member (28) is moved from the operating position (Y) side. A return spring (35) for biasing toward the standby position (X) is provided. The fluid supplied from the working fluid supply tool (32) is, for example, relatively low-pressure compressed air or any kind of gas. However, the check member (23) can be opened in a vacuuming operation described later. It may be anything, and is not limited to a specific type.

The valve device (1) is used as follows.
When the gas is taken out, the high pressure gas in the gas container (3) is opened through the inlet passage (7), the closing valve chamber (9), and the outlet passage (10) in this order by opening the stop valve (8). ). At this time, as shown in FIG. 2, the check valve (19) is switched to the standby position (X) by the forced valve opening member (28) being urged by the return spring (35). 23) is in contact with the check valve seat (21) by the biasing force of the check spring (24) and the gas pressure from the gas container (3). Accordingly, since the check valve (19) is in a closed state, when the stop valve (8) is closed, the gas extraction from the gas container (3) is stopped.

  If the backflow gas enters the gas outlet (6) for some reason during the gas extraction, the residual pressure holding valve (16) prevents the backflow. Further, when the gas extraction proceeds and the pressure in the gas container (3) decreases to the set value, the residual pressure holding valve (16) is closed, and the residual pressure in the gas container (3) is held at the set pressure. . For this reason, the contamination by the penetration | invasion of the atmosphere etc. in a gas container (3) is prevented.

When fresh gas is filled into the evacuated gas container (3), the remaining gas in the gas container (3) and the like is evacuated prior to the supply of the fresh gas.
That is, with the shut-off valve (8) closed, a filling / suctioning device fitting (not shown) is attached to the gas filling port (25) which also serves as the gas outlet (6), and is provided on this fitting. The residual pressure holding valve (16) is opened by the valve opening tool. On the other hand, a working fluid supply tool (32) is mounted on the outer surface of the lid bolt (18) as shown in FIG. 2, and the valve opening pressure receiving chamber (30) is provided from the working fluid supply tool (32). Is supplied with working fluid. Due to the fluid pressure in the valve receiving pressure chamber (30), the forced valve opening member (28) is switched from the standby position (X) to the operating position (Y) shown in FIG. The member (23) is separated from the check valve seat (21) and the check valve (19) is opened. In this state, a vacuuming operation is performed by the above filling / suction device, and the gas remaining in the internal space (A) of the gas container (3), the inlet passage (7), etc. is discharged.

  Next, fresh gas is supplied from the filling / suction device to the gas filling port (25). The fresh gas passes through the gas filling passage (26), that is, the outlet passage (10), the closing valve chamber (9), the communication passage (20), the check valve chamber (22), and the inlet passage (7) in this order. The internal space (A) of the gas container (3) is filled. At this time, the check member (23) is maintained in the valve open state by the pressure of the working fluid received through the forced valve opening member (28), so the fresh gas filling pressure is reversed. It is prevented that the pressure difference is reduced by the pressure difference due to the stop spring (24).

  When the fresh gas is sufficiently filled in the gas container (3), the working fluid in the valve-opening pressure receiving chamber (30) is discharged, and a return spring (35) and a check spring (24) are attached. The forced valve opening member (28) is moved to the standby position (X) by the force, and the check member (23) comes into contact with the check valve seat (21) to close the check valve (19). Thereafter, the connection fitting of the filling / suction device is removed from the gas filling port (25), and the working fluid supply tool (32) is removed from the lid bolt (18) to complete the filling operation.

  The working fluid in the valve-opening pressure receiving chamber (30) may be discharged after the evacuation operation and before the filling operation. In this case, the forced valve opening member (28) is moved to the standby position (X) by the urging force of the return spring (35) by discharging the working fluid, and the check member (23) is moved to the check valve seat (21). It will be in the state contact | abutted. When fresh gas is supplied to the gas filling port (25), the check member (23) is opened by the high pressure of the fresh gas, and the forced opening member (28) is moved to the operating position (Y) at the same time. To do. At this time, since the forced valve opening member (28) is urged in the reverse direction by the return spring (35), the movement due to the pressure of the fresh gas is buffered, and the forced valve opening member (28) is shocked. A heavy load is prevented.

  In the first embodiment, the return spring (35) is provided separately from the above-described check spring (24). However, both the check spring (24) and the return spring (35) have a check member (23 ) In the valve closing direction, and the forced valve opening member (28) is urged toward the standby position (X). Therefore, for example, the check spring (24) may be used as the return spring (35) as in the first modification shown in FIG. 4, or the return spring as in the second modification shown in FIG. (35) may also be used as the check spring (24). In these cases, the length of the lid bolt (18) can be shortened, and the entire valve device (1) can be formed compactly, which is preferable.

6A and 6B show a second embodiment of the present invention. FIG. 6A is a sectional view of a check valve in a closed state, and FIG. 6B is a sectional view of the check valve in an opened state.
In the second embodiment, the forced valve opening member (28) can be moved manually.
That is, as in the first embodiment, a valve opening means mounting hole (27) is formed in the lid bolt (18), and a rod-shaped forced valve opening member (28) is sealed in this mounting hole (27). It is slidably inserted. However, unlike the first embodiment, a concave groove (36) is formed in the outer end portion of the mounting hole (27), and the holding means (37) fitted into the concave groove (36) is provided. These are fixed to the forced valve opening member (28). The holding means (37) is formed long in a direction orthogonal to the axis of the forced valve opening member (28) as shown in FIG. 6 (b).

As shown in FIG. 6A, in the state where the holding means (37) is fitted in the concave groove (36), the forced valve opening member (28) is a check spring (24). Is switched to the standby position (X) by the urging force of the return spring (35), and the check member (23) is in contact with the check valve seat (21).
During the vacuuming operation, the holding means (37) is picked and pulled out from the concave groove (36). As a result, the forced valve opening member (28) is switched to the operating position (Y), the check member (23) is separated from the check valve seat (21), and the check valve (19) is opened. Become. Next, the holding means (37) pulled out from the concave groove (36) is rotated 90 degrees around the axial center of the forced valve opening member (28). As a result, the holding means (37) is supported on the outer end surface of the lid bolt (18) as shown in FIG. 6 (b), and the forced valve opening member (28) is maintained in the operating state (Y). The stop valve (19) is kept open. In this state, the above vacuuming operation is performed.

  When the evacuation operation is completed and the fresh gas is sufficiently filled, the holding means (37) is rotated 90 degrees around the axis of the forced valve opening member (28). As a result, the holding means (37) loses its support by the lid bolt (18), so that the forcible valve opening member (28) is switched to the standby position (X) by being biased by the return spring (35). The member (23) contacts the check valve seat (21), and the check valve (19) is closed. The other configuration is the same as that of the first embodiment described above, and functions in the same manner, so that the description is omitted.

  7 and 8 show a third embodiment of the present invention. FIG. 7 is a cross-sectional view of the gas container valve device, and FIG. 8 is a cross-sectional view of the main part of the valve device with the check valve opened.

  In the third embodiment, as in the first embodiment, a boss portion (17) protrudes at a position different from the outlet nozzle (5) of the housing (2). A lid bolt (18) is fixed, and a check valve (19) is attached to the lid bolt (18). The check valve chamber (22) of the check valve (19) communicates with the stop valve chamber (9) via the communication passage (20), and the communication passage (20) is connected to the gas filling passage (26). Part of it.

  Unlike the first embodiment, the housing (2) has a second boss portion (38) protruding on the opposite side of the boss portion (17). A valve opening means mounting hole (27) is formed in 38). The mounting hole (27) communicates with the check valve chamber (22) via the communication passage (20) constituting the gas filling passage (26), and the outer end portion is the second lid bolt. (39) Covered tightly. Reference numeral (40) denotes a safety valve provided in the gas escape passage communicating with the inlet passage (7).

  A rod-shaped forced valve opening member (28) is slidably inserted into the mounting hole (27), and the first end (41) of the forced valve opening member (28) is connected to the check member. (23) is approachable. The center axis of the mounting hole (27) is slightly deviated from the center axis of the communication passage (20), and the peripheral surface of the first end (41) of the forced valve opening member (28). Is in contact with one place on the inner peripheral surface of the communication path (20).

  The second end (42) of the forced valve opening member (28) is provided with a piston part (29) that slides tightly on the inner surface of the mounting hole (27). The piston part (29) A valve-opening pressure receiving chamber (30) is formed between the second lid bolt (39). Between the valve-opening pressure receiving chamber (30) and the outer peripheral surface of the second boss portion (38), a fluid introduction path (31) for allowing the working fluid to flow into the valve-opening pressure-receiving chamber (30). Is formed.

  A return spring (35) is mounted between the piston portion (29) and the inner surface of the mounting hole (27). The forced valve opening member (28) is biased in a direction away from the check valve (19) by the return spring (35), and is switched to the standby position (X) shown in FIG.

Next, an operation for forcibly opening the check valve will be described.
As shown in FIG. 8, a working fluid supply tool (32) is mounted on the outer surface of the second boss portion (38), and the working fluid is supplied from the working fluid supply tool (32) to the valve-opening pressure receiving chamber (30). ). The forced valve opening member (28) is switched from the standby position (X) to the operating position (Y) shown in FIG. 8 by the fluid pressure in the valve opening pressure receiving chamber (30), and the forced valve opening member (28 The check member (23) pressed at the first end (41) is separated from the check valve seat (21) and the check valve (19) is opened. A filling / suction device (not shown) is connected in advance to the gas filling port (25) which also serves as the gas outlet (6), and the evacuation operation is performed by this filling / suction device.

  When the evacuation operation is completed, the working fluid is discharged from the valve-opening pressure receiving chamber (30), whereby the forced valve-opening member (28) is moved to the standby position (FIG. 7) by the urging force of the return spring (35). Switch to X) and catch it on the inner end face of the second lid bolt (39). At this time, the check member (23) is urged by the check spring (24) and comes into contact with the check valve seat (21), and the check valve (19) is closed. Next, when fresh gas is supplied from the gas filling port (25), the high pressure causes the check member (23) to separate from the check valve seat (21) and the check valve (19) opens. To do. At this time, since the forced valve opening member (28) at the standby position (X) is received by the second lid bolt (39), it does not move with the high pressure of the fresh gas.

  After the above evacuation operation, if the working fluid is not removed from the valve-opening pressure receiving chamber (30), that is, fresh gas is supplied from the gas filling port (25) in the state shown in FIG. The forced valve opening member (28) switched to is moved to the standby position (X) side by being pressed by the high pressure of fresh gas. However, since the movement of the forced valve opening member (28) is buffered by the pressure of the working fluid in the valve opening pressure receiving chamber (30), the forced valve opening member (28) is moved to the second lid bolt (39). It is well prevented that it strikes. The rest of the configuration of the valve device (1) is the same as that of the first embodiment described above, and functions in the same manner, so that the description thereof is omitted.

  In the third embodiment, one end of the fluid introduction path (31) is opened on the outer peripheral surface of the second boss portion (38), and the working fluid supply tool (32) is removed from the second boss portion (38). Fitted. However, the working fluid supply tool used in the present invention is not limited to a specific shape or structure as long as it can supply the working fluid to the valve-opening pressure receiving chamber (30).

  For example, in the 1st modification of 3rd Embodiment shown in FIG. 9, the end of the fluid introduction path (31) is opening to the end surface of a 2nd cover volt | bolt (39). The working fluid supply tool (32) includes a C-shaped support arm (43) and a clamping cylinder (44) attached to one end thereof, and a working fluid supply path (33) is connected to the other end of the support arm (43). Is provided. This working fluid supply tool (32) is mounted so as to sandwich the housing (2) of the valve device (1), and is firmly fixed to the housing (2) by driving the sandwiching cylinder (44).

  In the second modification of the third embodiment shown in FIGS. 10 and 11, the second boss portion (38) is formed in the vicinity of the gas filling port (25) also serving as the gas outlet provided in the housing (2). It is. As shown in FIG. 11, the working fluid supply tool (32) attached to the second boss portion (38) has two guide pins (46) in the holding portion (45) at the tip, A working fluid supply path (33), a second flow path (47), and a pressurizing chamber (48) are provided, and a piston member (49) is inserted into the pressurizing chamber (48). The tip of the piston member (49) can abut on the periphery of the opening end of the fluid introduction path (31) opened on the outer surface of the second boss portion (38) in a coherent manner.

  The working fluid supply tool (32) is mounted at a predetermined position of the second boss portion (38) so as to slide with the two guide pins (46). Then, the working fluid is supplied from the second flow path (47) to the pressurizing chamber (48) to advance the piston member (49), and the tip thereof is sealed on the outer surface of the second boss portion (38). Press firmly. In this state, the working fluid is supplied from the supply passage (33) to the valve-opening pressure receiving chamber (30) through the fluid introduction passage (31).

  The gas container valve device described in each of the above embodiments is exemplified to embody the technical idea of the present invention, and includes a housing, a stop valve, a check valve, a residual pressure holding valve, a safety valve, and the like. The shape, structure, and arrangement as well as the shape of the forced valve opening means, the position of the return spring, the shape of the piston, the shape and structure of the working fluid supply tool, etc. are not limited to these embodiments. Various modifications can be made within the scope of the claims of the invention, and it is needless to say that the fluid handled by the valve device is not limited to a specific type.

For example, in each of the above-described embodiments, the check valve seat is formed in the portion where the flow path on the gas filling port side opens to the check valve chamber. However, in the present invention, In addition, a check valve seat may be provided at a portion where the gas container side flow path opens into the check valve chamber.
In each of the above embodiments, the gas filling port also serves as the gas outlet. However, in the present invention, a gas filling port may be provided separately from the gas outlet.

  The valve device of the present invention can forcibly open the check valve provided in the gas filling passage with a simple operation, and when the forced valve open state is canceled, the forced valve opening means is reliably returned to the standby position. Therefore, the forced opening means can be prevented from being worn or damaged at an early stage, so that it can be suitably used for a valve device attached to a gas container that contains compressed gas or liquefied gas.

1 is a partially cutaway view of a gas container valve device according to a first embodiment of the present invention. It is sectional drawing of the non-return valve of 1st Embodiment. It is sectional drawing of the non-return valve of 1st Embodiment of a valve opening state. It is sectional drawing of a non-return valve which shows the 1st modification of 1st Embodiment. It is sectional drawing of a non-return valve which shows the 2nd modification of 1st Embodiment. FIG. 6A is a sectional view of a check valve in a closed state, and FIG. 6B is a sectional view of the check valve in an opened state, showing a second embodiment of the present invention. It is sectional drawing of the valve apparatus which shows 3rd Embodiment of this invention. It is principal part sectional drawing of the valve apparatus of the state which opened the check valve of 3rd Embodiment. It is sectional drawing of the valve apparatus equipped with the working fluid supply tool which shows the 1st modification of 3rd Embodiment. It is sectional drawing of the valve apparatus which shows the 2nd modification of 3rd Embodiment. It is sectional drawing of the working fluid supply tool with which the valve apparatus of the 2nd modification of 3rd Embodiment was mounted | worn. It is a partially broken figure of the valve apparatus for gas containers which shows a prior art. It is principal part sectional drawing of the valve apparatus of the state of opening the check valve of the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Valve apparatus for gas containers 2 ... Housing 3 ... Gas container
19 ... Check valve
22 Check valve chamber
23 ... Check member
25… Gas filling port
26… Gas filling path
27… Valve opening mounting hole
28 ... Forced valve opening means (forced valve opening member)
29 ... Piston part
30… Valve open pressure chamber
35 ... Return spring
41 ... First end of forced valve opening means (28) A ... Internal space of gas container (3) X ... Standby position Y ... Operating position

Claims (4)

A gas filling passage (26) is provided in the housing (2) to allow the gas filling port (25) to communicate with the internal space (A) of the gas container (3). The gas filling passage (26) includes the above internal space. A check valve (19) for blocking the flow from (A) to the gas filling port (25) is provided, and a check member (23) inserted into the check valve chamber (22) of the check valve (19) A gas container valve device comprising forced valve opening means (28) for forcibly opening the valve,
A valve opening means mounting hole (27) is provided in communication with the check valve chamber (22), and the forced valve opening means (28) is inserted into the mounting hole (27) so as to be slidable. ,
The forced valve opening means (28) is moved forward and backward in the mounting hole (27) to forcibly open the check member (23), and the check member ( 23) It is possible to switch to the standby position (X) that releases the forced valve opening,
A gas container valve device comprising a return spring (35) for urging the forced valve opening means (28) from the operating position (Y) side to the standby position (X) side.   The mounting hole (27) is provided on the opposite side of the check member (23) from the open end of the gas filling passage (26) that opens to the check valve chamber (22). The valve device for a gas container according to claim 1, wherein the forced valve opening means (28) is fixed to the check member (23).   The mounting hole (27) communicates with the check valve chamber (22) through the gas filling passage (26), and the forced valve opening means (28) inserted into the mounting hole (27). 2. The valve device for a gas container according to claim 1, wherein the first end (41) of the gas container faces the check member (23) so as to be able to contact and separate.   The forced valve opening means (28) is provided with a piston portion (29) that slides tightly on the inner surface of the mounting hole (27), and a valve opening pressure receiving chamber (30) is formed on one side of the piston portion (29). Thus, the working fluid can flow into the valve opening pressure receiving chamber (30), and the forced valve opening means (28) is operated from the standby position (X) by the fluid pressure in the valve opening pressure receiving chamber (30). The valve device for a gas container according to claim 2 or 3, wherein the valve device is configured to be switched to a position (Y).

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