JP2018028335A - Valve device - Google Patents

Abstract

Provided is a valve device capable of improving assemblability with respect to a valve device having both functions of a safety valve and a manual valve.
A valve device (1) is provided in a housing (12) in which a valve passage (31d) connecting a first port (26) and a second port (28) is formed, and in the housing so as to open and close the valve passage by manual operation. A manual valve valve body 21 having a discharge passage 39 connecting the port to the atmosphere, a safety valve valve body 22 provided in the manual valve valve body so as to close the discharge passage, and moving in a direction to open the discharge passage; A biasing spring 23 provided in the manual valve body and biasing the safety valve body in a direction to open the discharge passage; and a safety valve provided in the manual valve body and in which the discharge passage is closed. A support body 24 that supports the valve body against the biasing force of the biasing spring and releases the support for the valve body for the safety valve when the temperature reaches a predetermined temperature or more is provided.
[Selection] Figure 2

Description

  The present invention relates to a valve device having both functions of a safety valve and a manual valve.

  A tank for storing gas is provided with a safety valve and a manual valve. When these two valves are provided in the valve block, the number of oil passages formed in the valve block increases, and a space for providing each valve is required. That is, the valve block is increased in size. Therefore, a valve that can achieve the functions of these two valves with one valve is conceivable. As an example, a safety valve such as that disclosed in Patent Document 1 is known.

  The safety valve of Patent Document 1 includes a main body portion, a valve body, an urging spring, and a fusing portion. In the safety valve, a spring is externally mounted on a distal end portion of a valve body having a base end portion covered with a main body portion, and in this state, the spring body is inserted into a through hole of the valve body and attached. Further, the fusing part is disposed in the main body part to support the valve body, and when melted, the support of the valve body is lost, and the valve body comes out of the small diameter hole of the through hole and the small diameter hole is opened. In the safety valve, the main body is configured to be manually operable, and the valve body can be removed from the small diameter hole by manual operation. Thus, the safety valve of Patent Document 1 has both functions of a safety valve and a manual valve.

Japanese Patent No. 5068093

  In the safety valve of Patent Document 1, the safety valve is completed only when the valve body and the spring are assembled to the valve body. Therefore, it is necessary to adjust the position of the spring when assembling the valve body. In general, various configurations in addition to safety valves are attached to the valve body. Therefore, when adjusting the position of the spring when assembled to the valve body, other components are not attached between them, and the valve body Production efficiency decreases. Therefore, it is desired to improve the ease of assembly of the safety valve.

  Therefore, an object of the present invention is to provide a valve device that can improve the assemblability with respect to a valve device having both functions of a safety valve and a manual valve.

  The valve device of the present invention is provided in the housing in which a valve passage connecting the first port and the second port is formed, and in the housing so as to open and close the valve passage by manual operation. A valve body for a manual valve having a discharge passage connected to the safety valve, a valve body for a safety valve provided in the valve body for the manual valve so as to close the discharge passage, and movable in a direction to open the discharge passage, A biasing spring provided in the manual valve body and biasing the safety valve valve body in a direction to open the discharge passage; and provided in the manual valve valve body in a state in which the discharge passage is closed. A support body that supports the valve body for the safety valve so as to resist the biasing of the biasing spring, and that releases the support for the valve body for the safety valve when the temperature exceeds a predetermined temperature.

  According to the present invention, the manual valve function can be achieved by the manual valve body, the safety valve function can be achieved by the safety valve body, and the functions of both the manual valve and the safety valve can be achieved. Moreover, since the valve body for safety valves, the urging spring, and the support body are provided in the valve body for manual valves, they can be configured as a unit. Thereby, after attaching the valve body for safety valves etc. to the valve body for manual valves, the valve body for manual valves can be attached to a housing. That is, before attaching the manual valve body to the housing, the positions of the biasing spring and the support can be adjusted in advance, and the production efficiency can be improved.

  In the above invention, a seat member provided on the housing and on which the manual valve valve body is seated, the manual valve valve body being seated on the seat member to close the valve passage, and the seat member The safety valve body may be closed in a state where the valve passage is opened by moving away from the valve, and the valve body for the safety valve is inserted into the discharge passage.

  According to the above configuration, since the valve passage is opened and closed by seating and separating the manual valve valve body on the seat member, the manual valve valve body is allowed to be displaced relative to the seat member during opening and closing. can do. Therefore, the valve passage can be repeatedly opened and closed without considering the displacement of the manual valve body relative to the seat member, and the valve passage can be opened and closed repeatedly only by operating the manual operation unit.

  In the above invention, the second port may be connected to an air opening that is open to the atmosphere, and the discharge passage may be connected to the second port.

  According to the above configuration, there is no need to newly form a passage for connecting the discharge passage to the atmosphere, and the number of passages formed in the housing can be reduced. Thereby, size reduction of a housing can be achieved.

  In the above invention, the housing has a third port connected to an atmosphere opening port that is open to the atmosphere, the first port is connected to a tank for storing gas, and the second port is connected to the tank. The discharge port may be connected to the atmosphere via the third port, connected to at least one of a filling port for filling the gas and an outlet for discharging the gas in the tank.

  If the said structure is followed, it can be made to play the role of the manual valve for interrupting | blocking between at least one of the channel | path which fills a tank with gas, and the channel | path which outputs the gas of a tank, and a tank.

  In the above invention, the support body is configured to be capable of relative displacement in a direction of opening the discharge passage with respect to the manual valve valve body by a manual operation, and the safety valve valve body is configured to move the support body to the manual valve. When the valve body is displaced relative to the valve body, the discharge passage may be opened.

  According to the above configuration, the discharge passage can be opened by manually operating the safety valve body. Thereby, the first port can be communicated with the atmosphere also by manually operating the valve body for the safety valve.

  In the above invention, further comprising a restriction member that is provided in the housing and restricts a moving distance of the manual valve valve body to a predetermined distance or less when the manual valve valve body is moved in a direction in which the valve passage opens. The valve body for a manual valve may be inserted so that the sealed state with the housing is maintained even if it moves a predetermined distance.

  According to the above configuration, it is possible to prevent the manual valve valve body from being removed from the housing by moving the manual valve valve body, and it is possible to suppress the escape of gas from the housing.

  ADVANTAGE OF THE INVENTION According to this invention, an assembly property can be improved regarding the valve apparatus which has the function of both a safety valve and a manual valve.

It is a circuit diagram which shows the circuit of the stopper of a tank provided with the valve apparatus of 1st Embodiment. It is sectional drawing which shows the valve apparatus of 1st Embodiment. FIG. 3 is a cross-sectional view showing a state in which a valve passage is opened in the valve device of FIG. 2. FIG. 3 is a cross-sectional view showing a state in which a discharge passage is opened under a condition of a predetermined temperature or higher in the valve device of FIG. It is sectional drawing which shows the valve apparatus of 2nd Embodiment. FIG. 6 is a cross-sectional view showing a state where the valve passage is opened in the valve device of FIG. 5. 6 is a cross-sectional view showing a state in which the discharge passage is opened by manual operation in the valve device of FIG. FIG. 3 is a cross-sectional view showing a state in which a discharge passage is opened under a condition of a predetermined temperature or higher in the valve device of FIG.

  Hereinafter, valve devices 1 and 1A according to first and second embodiments of the present invention will be described with reference to the drawings. In addition, the concept of the direction used in the following description is used for convenience in description, and does not limit the direction of the configuration of the invention in that direction. Moreover, the valve devices 1 and 1A described below are only one embodiment of the present invention. Therefore, the present invention is not limited to the embodiments, and additions, deletions, and changes can be made without departing from the spirit of the invention.

[First Embodiment]
The gas tank 2 shown in FIG. 1 is provided with a stopper 11 for closing the opening, and the stopper 11 is provided with various passages and structures for filling, outputting, and discharging the gas. . For example, a tank passage 13 is formed in the valve body 12 provided in the stopper 11. The tank passage 13 has a tank port 13a and is connected to the inside of the tank 2 through the tank port 13a. A manual valve 14 is interposed in the tank passage 13 so that the tank passage 13 can be opened and closed by manually operating the manual valve 14. Further, the valve body 12 is formed with a filling passage 15, an output passage 16, and an atmosphere release passage 17, and the three passages 15 to 17 are connected in parallel on the downstream side of the manual valve 14 of the tank passage 13. ing.

  The filling passage 15 has a filling port 15a, and a filling gas can be injected from the filling port 15a. Further, a check valve 18 is interposed in the filling passage 15 so that the gas in the tank 2 is not discharged from the filling port 15a. The output passage 16 has an output port 16a, and the output port 16a is connected to a gas consumer (for example, an internal combustion engine and a fuel cell) via a pressure reducing valve, a pressure regulating valve, or the like. The atmosphere opening passage 17 has an atmosphere opening port 17a, and the atmosphere opening port 17a is opened to the atmosphere so that the gas in the tank 2 can be released to the atmosphere. Further, the valve device 1 is provided in the atmosphere opening passage 17. The valve device 1 is a composite valve provided with a manual valve function for opening and closing the atmosphere opening passage 17 by manual operation and a safety valve function for opening the atmosphere opening passage 17 when the ambient temperature of the valve device 1 becomes a predetermined temperature or higher. is there. The structure of the valve device 1 will be described in detail below.

<Valve device>
As shown in FIG. 2, the valve device 1 includes a valve body 12 that constitutes a stopper 11, and further includes a seat member 20, a manual valve valve body 21, a safety valve valve body 22, and a biasing spring. 23, a support 24, and a regulation plate 25. The valve body 12 is an example of a housing and has a valve hole 31. The valve hole 31 is a hole having a circular cross section formed along a predetermined axis L1, and mainly includes three portions. That is, the valve hole 31 has a communication portion 31a, a seat fitting portion 31b, and a valve body housing portion 31c. The valve body housing portion 31c, the seat fitting portion 31b, and the communication portion 31a are arranged on the axis line. They are arranged in that order from one side (outside) in the axial direction along L1.

  The communication portion 31a has an upstream side connected to the tank passage 13 and a downstream side connected to the sheet fitting portion 31b. The seat fitting portion 31b is formed to have a larger diameter than the communication portion 31a, and is connected to the valve body housing portion 31c on the side opposite to the communication portion 31a. An annular sheet member 20 made of synthetic resin or the like is fitted to the sheet fitting portion 31b in a state where a seal is achieved. The inner diameter of the sheet member 20 substantially matches the hole diameter of the communication portion 31a. Further, the opening on the valve body accommodating portion 31c side of the seat member 20 constitutes a tank side port 26, and the communication portion 31a and the valve body accommodating portion 31c are connected via a tank side port 26 which is an example of a first port. Communicate. Further, the valve body accommodating portion 31c is formed to have a larger diameter than the seat fitting portion 31b, and one side in the axial direction of the valve body accommodating portion 31c is open to the outside. From this opening, a valve body 21 for manual valve is inserted and screwed into the inner peripheral surface of the valve body 12.

  The valve body 21 for manual valves is formed in the substantially cylindrical shape, and is inserted in the valve body accommodating part 31c so that the axis line may correspond with the axis line L1. The manual valve body 21 has a distal end portion 21a having a smaller diameter than the remaining portion, and the outer diameter of the distal end portion 21a is smaller than the outer diameter of the seat member 20 and larger than the inner diameter thereof. The tip portion 21 a having such a shape is configured to close the tank-side port 26 by being seated on the seat member 20.

  Further, a seal groove 21b is formed on the outer peripheral surface of the intermediate portion of the manual valve valve body 21 over the entire circumference, and an annular seal member 27 is fitted in the seal groove 21b. . An inward flange portion 12 a is formed on the inner peripheral surface of the valve body 12 at a position corresponding to the seal member 27. The inward flange portion 12a protrudes inward in the radial direction, and the seal member 27 contacts the inward flange portion 12a. Thereby, the area | region by the side of the communication part 31a of the valve body accommodating part 31c is sealed, and the valve channel | path 31d is formed there.

  In addition, a plurality of communication holes 21c (four communication holes 21c in the present embodiment) are formed on the outer peripheral surface of the manual valve valve body 21 at the tip side of the seal groove 21b. The four communication holes 21c are arranged at equal intervals in the circumferential direction, and penetrate the manual valve body 21 in the radial direction. The manual valve valve body 21 has an inner hole 30 therein, and the inner hole 30 communicates with the valve passage 31d by opening the safety valve body 22 through the four communication holes 21c. . A discharge port 28, which is an example of a second port, is formed on the inner peripheral surface of the valve body 12, and the discharge port 28 is connected to the valve passage 31d.

  The manual valve body 21 configured in this way is attached by screwing the base end side of the seal groove 21b to the inner peripheral surface of the valve body 12, and receives a load directed in one axial direction. However, it cannot be removed from the valve body accommodating portion 31c. On the other hand, when the manual valve valve body 21 is turned around one axis L1, the manual valve valve body 21 moves in one axial direction, and the distal end portion 21a of the manual valve valve body 21 can be separated from the seat member 20. . Further, when the manual valve body 21 is rotated in the opposite direction, the manual valve body 21 moves in the other axial direction, and the front end portion 21a of the manual valve body 21 can be seated close to the seat member 20. it can. Thus, by turning the manual valve body 21, the manual valve body 21 moves between a first open position where the manual valve body 21 is seated on the seat member 20 and a first closed position which is distant from the seat member 20. It has become. Further, the manual valve body 21 has a base end portion protruding outward from the valve body receiving portion 31c, and has a manual operation portion 21d at the base end portion.

  21 d of manual operation parts are formed in the outer peripheral surface of the base end part of the valve body 21 for manual valves over the perimeter of a circumferential direction. The manual operation portion 21d protrudes outward from the base end portion like a flange, and the external shape of the manual operation portion 21d is formed in a substantially polygonal shape (for example, a hexagon) in plan view. That is, the manual operation unit 21d can engage a tool such as a wrench on the outer peripheral surface thereof, and rotates the manual operation unit 21d by turning the engaged tool, that is, the manual valve valve element 21 is moved along the axis L1. It can be turned around. Accordingly, the manual valve valve body 21 can be rotated using a tool such as a wrench to move the manual valve valve body 21 in one axial direction and the other in the axial direction. The valve body 12 is provided with a restriction plate 25.

  The restricting plate 25 is a plate-like member formed in an L shape in a side view, and at least one in a position radially outward from the manual operation portion 21d, in the present embodiment, in the radial direction of the manual operation portion 21d. One on each side. The restriction plate 25 extends from the surface of the valve body 12 in parallel to the axis L1, and the tip end portion covers the outer peripheral edge portion of the manual operation portion 21d. Further, there is a predetermined interval X between the front end portion of the restricting plate 25 and the outer peripheral edge of the manual operation portion 21d, and the manual valve valve body 21 is rotated in the axial direction by turning the manual valve valve body 21. When moved to one side, the movement amount of the manual valve valve element 21 is restricted to a distance X or less by the restriction plate 25 so that the manual valve valve element 21 does not come off the valve body 12. The interval X is set to be smaller than at least the length in which the manual valve valve element 21 is inserted into the valve hole 31. In this embodiment, the interval X is set to such a distance that the seal member 27 is not detached from the inward flange portion 12a. ing. Therefore, even if the manual valve valve body 21 moves about the distance X, it is inserted into the valve hole 31 while maintaining the sealed state with the inward flange portion 12a.

  As described above, the manual valve valve body 21 configured in this way has the inner hole 30 therein, and the inner hole 30 is formed along the axis L1. The inner hole 30 is composed of three parts, that is, a communication part 30a, an insertion part 30b, and an accommodation part 30c, which are in the order described above from the distal end side (that is, the other side in the axial direction) of the manual valve body 21. positioned. That is, the communication portion 30 a is located on the most distal end side, and is open at the distal end of the manual valve valve body 21. Therefore, in a state where the manual valve valve body 21 is seated on the seat member 20, the communication portion 30 a is connected facing the tank side port 26. The insertion portion 30b is located between the communication portion 30a and the accommodation portion 30c, and has a larger diameter than the communication portion 30a and a smaller diameter than the accommodation portion 30c. The accommodating portion 30c is connected to the four communication holes 21c described above, and the valve body 22 for the safety valve is accommodated.

  The valve body 22 for the safety valve is formed in a substantially cylindrical shape, the distal end side is formed with a small diameter with respect to the intermediate portion 22b, and the proximal end side is formed with a larger diameter than the distal end side. Moreover, the front-end | tip part 22a of the valve body 22 for safety valves is formed more thinly, and the sealing member 32 is armored on the outer peripheral surface. The seal member 32 is formed to have a diameter slightly larger than the diameter of the insertion portion 30 b of the inner hole 30, and is inserted into the insertion portion 30 b of the inner hole 30 together with the distal end portion 22 a of the valve body 22 for the safety valve. Thus, the seal member 32 is interposed between the distal end portion 22a of the safety valve valve body 22 and the inner peripheral surface of the manual valve valve body 21, and the insertion portion 30b is blocked. Further, the safety valve body 22 is accommodated in the manual valve body 21 so as to be relatively displaceable. When the safety valve body 22 moves to the other side in the axial direction, the distal end portion 22a is detached from the insertion portion 30b and the accommodation portion 30c is opened. It has become. Thus, the valve body 22 for safety valves is comprised so that a movement is possible between the 2nd closed position which the insertion part 30b closes, and the 2nd open position which opens the insertion part 30b.

  Further, as described above, the intermediate portion 22b of the safety valve body 22 is formed with a large diameter with respect to the distal end side of the safety valve body 22, and the intermediate portion 22b of the safety valve body 22 is energized. A spring 23 is packaged. The urging spring 23 is a so-called compression coil spring, and is formed in a substantially cylindrical shape. The urging spring 23 has an intermediate portion 22b of the safety valve valve body 22 inserted therein, and is disposed in the manual valve valve body 21, that is, in the accommodating portion 30c. Further, as described above, the base end side of the valve body 22 for the safety valve is formed to have a larger diameter than the intermediate portion 22b, and has a flange 33. The flange 33 is formed over the entire circumference in the outer peripheral surface of the base end portion of the safety valve valve body 22, and the safety valve valve body 22 receives a biasing spring 23 by the flange 33.

  More specifically, the flange 33 protrudes outward in the radial direction and forms a first spring receiving surface 33a. The first spring receiving surface 33 a is an annular flat surface that faces the other axial direction and surrounds the intermediate portion in the flange 33. The manual valve valve body 21 is formed with a second spring receiving surface 21e corresponding to the first spring receiving surface 33a. The second spring receiving surface 21e is an annular flat surface formed in the inner hole 30 where the insertion portion 30b and the accommodation portion 30c are connected to expand the diameter. These two spring receiving surfaces 33a and 21e are arranged so as to face each other in the axial direction, and the urging spring 23 is arranged in a compressed state between the two spring receiving surfaces 33a and 21e. As a result, the safety valve body 22 is urged by the urging spring 23 in the axial direction, that is, in the direction in which the safety valve body 22 is removed from the insertion portion 30b. In order to resist the urging of the urging spring 23, the safety valve body 22 is supported by a support 24.

  The support 24 has a lid 34 and a glass ball 35. The lid 34 is formed in a generally bottomed cylindrical shape, and is provided in the manual valve body 21. That is, the lid 34 is inserted into the accommodating portion 30c of the inner hole 30 from the opening on the proximal end side of the manual valve valve body 21, and is screwed onto the inner peripheral surface of the manual valve valve body 21 in a state where a seal is achieved. ing. Thereby, the inner hole 30 is sealed. Further, the tip side portion of the lid 34 reaches the flange 33 of the valve body 22 for the safety valve, and the flange 33 is accommodated in the lid 34. There is a gap between the flange 33 and the ceiling surface 34 a of the lid 34, and a glass ball 35 is accommodated in the space between the flange 33 and the ceiling surface of the lid 34. In FIG. 2, the tip side portion of the lid 34 reaches the flange 33 of the valve body 22 for the safety valve, but the tip side portion of the lid 34 may not reach the flange 33 of the valve body 22 for the safety valve. In this case, the flange 33 is accommodated in the valve body 21 for manual valve.

  The glass ball 35 is a substantially hollow cylindrical member closed on both sides in the axial direction, and is made of glass or the like. A liquid is enclosed in the glass ball 35. The glass ball 35 configured in this manner is interposed between the flange 33 and the ceiling surface 34a of the lid 34, and supports the safety valve body 22 from one side in the axial direction. More specifically, a synthetic resin sheet 36 is attached to the ceiling surface of the lid 34, and one end of the glass ball 35 in the axial direction is brought into contact with the sheet 36. An insertion hole 33b is formed around the axis of the base end of the flange 33, and the other axial end of the glass ball 35 is inserted therethrough. Further, a synthetic resin ring member 37 is disposed in the opening of the insertion hole 33b, and the glass ball 35 is inserted into the ring member 37 to support the outer peripheral surface of the glass ball 35. By arranging in this way, the support valve 24 supports the safety valve body 22 against the urging force.

  In addition, a communication passage 22c connected to the insertion hole 33b is formed in the intermediate portion 22b and the flange 33 of the valve body 22 for the safety valve. The communication passage 22 c is a part of the housing portion 30 c of the inner hole 30 and is connected to an annular space 38 around the intermediate portion 22 b of the safety valve body 22. The space 38 constitutes a discharge passage 39 together with the communication portion 30a and the insertion portion 30b of the inner hole 30 and the four communication holes 21c. The discharge passage 39 is connected to the discharge port 28 via the valve passage 31d. ing. The safety valve body 22 closes the discharge passage 39 by being positioned at the second closed position, and opens the discharge passage 39 by being positioned at the second open position.

<Function of valve device>
In the valve device 1 configured as described above, the distal end portion 21a of the manual valve valve body 21 is seated on the seat member 20, and the valve passage 31d is closed. In the state where the tip portion 21a is seated on the seat member 20, the tank side port 26 and the discharge passage 39 are connected, but the tip portion 22a of the valve body 22 for the safety valve is inserted into the insertion portion 30b, and the discharge is performed. The passage 39 is also closed. Thus, in the valve device 1, the valve passage 31 d and the discharge passage 39 are closed by the valve bodies 21 and 22 in the initial state. From this state, when the tool is engaged with the manual operation portion 21d of the manual valve valve body 21 to rotate the manual valve valve body 21 or the glass ball 35 of the valve device 1 reaches a predetermined temperature or higher, the valve passage 31d and discharge passage 39 are open and will be described in detail below.

  First, a manual valve function for opening and closing the valve passage 31d by manual operation and releasing gas to the atmosphere will be described. In the valve device 1, the manual valve body 21 is moved in one axial direction by engaging a tool with the manual operation portion 21 d of the manual valve body 21 and turning the manual valve body 21 around one axis. (See FIG. 3). By moving the manual valve valve body 21 in one axial direction, the distal end portion 21a of the manual valve valve body 21 is separated from the seat member 20, and the valve passage 31d is opened. As a result, gas is guided from the tank side port 26 to the discharge port 28 through the valve passage 31d.

  The valve device 1 having such a function is interposed in the atmosphere opening passage 17 as described above, the tank-side port 26 is an upstream portion of the atmosphere opening passage 17, and the discharge port 28 is a downstream side of the atmosphere opening passage 17. It is connected to each part. Therefore, the open air passage 17 is opened by opening the valve passage 31d. As a result, the gas in the upstream portion of the atmosphere opening passage 17 is guided to the downstream portion of the atmosphere opening passage 17 through the valve passage 31d and can be released to the atmosphere from the atmosphere opening port 17a. Thereby, in a state where the tank passage 13 is opened by the manual valve 14, the gas in the tank 2 can be released to the atmosphere via the valve device 1.

  Further, by continuing to turn the manual valve valve body 21 around one axis, the distal end portion 21a of the manual valve valve body 21 can be further separated from the seat member 20, and the manual valve valve body 21 is moved in the axial direction. The valve passage 31d can be opened with an opening according to the distance. That is, by continuing to rotate the manual valve body 21 around one axis, the valve passage 31d can be opened with a large opening, and the gas in the tank 2 can be quickly released to the atmosphere. On the other hand, if the valve body 21 for manual valves is continuously rotated to one side around the axis, the manual operation portion 21d eventually hits the restriction plate 25. Thereby, it can stop that the valve body 21 for manual valves further moves to an axial direction one side, and can prevent that the valve body 21 for manual valves slips out from the valve hole 31. FIG. Further, the seal member 27 remains in contact with the inward flange portion 12a of the valve body 12 when the manual operation portion 21d hits the restriction plate 25. Therefore, the valve passage 31d can be isolated from the atmosphere by the seal member 27, and gas can be prevented from leaking into the atmosphere.

  Further, in the valve device 1, the manual valve body 21 can be moved in the other axial direction by engaging a tool with the manual operation portion 21d and turning the manual valve body 21 to the other around the axis. Thereby, the front-end | tip part 21a of the valve body 21 for manual valves approaches the seat member 20, and seats on the seat member 20 soon. Then, the valve passage 31d is closed, and the gas flow from the tank side port 26 to the discharge port 28 is stopped. That is, when the valve passage 31d is closed, the atmosphere release passage 17 is closed, and the flow from the upstream portion to the downstream portion of the atmosphere release passage 17 is stopped. Thereby, the release of gas from the atmosphere opening 17a is stopped.

  Further, as described above, the valve device 1 has a safety valve function of opening the discharge passage 39 and releasing the gas to the atmosphere when the ambient temperature rises and the ambient temperature of the glass ball 35 rises. Hereinafter, the safety valve function will be described. In the initial state, as described above, the manual valve valve body 21 is seated on the seat member 20, and the safety valve valve body 22 is inserted into the insertion portion 30b. Therefore, the valve passage 31d and the discharge passage 39 are closed so that the gas in the tank 2 is not released from the atmosphere opening port 17a.

  In this state, when the ambient temperature of the valve device 1 rises and the temperature of the glass ball 35 rises, the liquid in the glass ball 35 expands accordingly. Eventually, when the temperature of the glass ball 35 (more specifically, the temperature of the liquid) becomes equal to or higher than a predetermined temperature, the glass ball 35 bursts without being able to withstand the expansion of the liquid. By rupturing, there is no support for the safety valve body 22 and the support of the safety valve body 22 is released (see FIG. 4). As a result, the safety valve body 22 is moved in the axial direction by the urging of the urging spring 23, and the distal end portion 22a of the safety valve body 22 is eventually removed from the insertion portion 30b. Then, the insertion portion 30b and the accommodation portion 30c communicate with each other, and the discharge passage 39 opens. In a state where the manual valve valve element 21 is seated on the seat member 20, the tank side port 26 communicates with the discharge passage 39, and the gas guided to the tank side port 26 passes through the discharge passage 39 and passes through the valve passage 31 d. And further from the valve passage 31d to the discharge port 28. That is, when the discharge passage 39 is opened, the upstream portion and the downstream portion of the atmosphere release passage 17 communicate with each other, and the gas in the tank 2 can be released from the atmosphere release port 17a.

  Thus, the valve device 1 has both a manual valve function and a safety valve function. Further, in the valve device 1, the safety valve body 22, the urging spring 23 and the support body 24 are assembled in the manual valve body 21, that is, they are configured as a unit. Therefore, after assembling the safety valve body 22 and the like to the manual valve body 21, the manual valve body 21 can be attached to the valve body 12. That is, before attaching the manual valve body 21 to the valve body 12, the positions of the biasing spring 23 and the glass ball 35 can be adjusted in advance, and the production efficiency can be improved.

  In the valve device 1, the manual valve valve element 21 is seated on the seat member 20 to close the valve passage 31 d, and the manual valve valve element 21 is separated from the seat member 20 to open the valve passage 31 d. Has been. Therefore, the displacement of the manual valve valve body 21 with respect to the seat member 20 at the time of opening and closing can be allowed. Therefore, the valve passage 31d can be repeatedly opened and closed without considering the positional deviation of the manual valve valve element 21 with respect to the seat member 20, and the valve passage 31d is repeatedly opened and closed simply by operating the manual operation portion 21d. be able to. On the other hand, in the valve device 1, the discharge passage 39 is closed by inserting the distal end portion 22a of the valve body 22 for the safety valve into the insertion portion 30b. Thereby, the discharge passage 39 can be closed with higher accuracy.

  Further, in the valve device 1, a discharge passage 39 for releasing gas to the atmosphere is connected to the atmosphere opening port 17 a via the discharge port 28. Therefore, it is not necessary to newly form a passage for connecting the discharge passage 39 to the atmosphere, and the number of passages formed in the valve body 12 can be reduced. Thereby, size reduction of the valve body 12 can be achieved.

[Second Embodiment]
The valve device 1A of the second embodiment is similar in configuration to the valve device 1 of the first embodiment. Therefore, regarding the configuration of the valve device 1A of the second embodiment, the configuration different from the valve device 1 of the first embodiment will be mainly described, and the same components will be denoted by the same reference numerals and the description thereof will be omitted. .

<Valve device>
A valve device 1A according to the second embodiment shown in FIG. 5 is configured so that the valve device 1 according to the first embodiment also has the function of the manual valve 14. That is, the valve device 1A is configured not only to open and close the atmosphere opening passage 17, but also to open and close the tank passage 13 by manual operation. Below, the specific structure of 1 A of valve apparatuses is demonstrated.

  The valve device 1A includes a valve body 12A, a seat member 20, a manual valve body 21A, a safety valve body 22, a biasing spring 23, a support body 24, and restriction plates 25 and 25A. In the manual valve body 21A, a seal groove 21f is formed on the outer peripheral surface of the distal end portion 21a over the entire circumference, and an annular seal member 27A is fitted in the seal groove 21f. In addition, the inner peripheral surface of the valve body 12 has a portion facing the distal end portion 21a narrower inward in the radial direction than the proximal end portion, and a step portion 12b is formed there. The seal member 27A is in contact with the stepped portion 12b on the inner peripheral surface of the valve body 12, and seals between the distal end portion 21a of the manual valve valve body 21A and the valve body 12.

  Further, in the distal end portion 21a of the manual valve valve body 21A, the portion on the distal end side from the seal groove 21f is formed with a smaller diameter than the portion on the proximal end side from the seal groove 21f. Thus, a valve passage 31d which is an annular space is formed between the distal end portion 21a of the manual valve valve body 21A and the valve body 12. Further, a filling port 41 and an output port 42 are formed on the inner peripheral surface of the valve body 12, and the filling port 41 and the output port 42, which are examples of the second port, face the valve passage 31d. The filling port 41 is connected to the filling port 15 a through the filling passage 15, and the output port 42 is connected to the output port 16 a through the output passage 16.

  The filling port 41 and the output port 42 are disconnected from the tank-side port 26 in a state where the tip portion 21a is seated on the seat member 20 and the valve passage 31d is closed, and the tip portion 21a is separated from the seat member 20. With the valve passage 31d open, the tank-side port 26 is connected via the valve passage 31d. Thus, the manual valve body 21A is seated and disengaged from the seat member 20 to open and close the valve passage 31d, whereby the filling port 41 and the output port 42 are disconnected from the tank side port 26, It is supposed to be connected.

  In this way, in the valve device 1A, the valve passage 31d is formed around the distal end portion 21a of the manual valve valve body 21A by providing the seal member 27A on the manual valve valve body 21A. Further, by providing the seal member 27A, a valve space 31e is formed between the two seal members 27 and 27A around the intermediate portion of the manual valve valve body 21A. The valve space 31e is isolated from the valve passage 31d and the atmosphere by the two seal members 27, 27A, and the discharge port 28 is arranged on the inner peripheral surface of the valve body 12 so as to be disposed at a position corresponding to the valve space 31e. Is formed. That is, the valve space 31e is connected to the atmosphere opening port 17a via the discharge port 28 which is an example of the third port.

  In addition, the base 34 of the lid 34 of the support 24 protrudes from the manual valve valve body 21A in one axial direction, and has a manual operation portion 34b at the base end. The manual operation portion 34 b is formed on the outer peripheral surface of the lid 34 over the entire circumference in the circumferential direction. The manual operation portion 34b projects outward like a flange like the manual operation portion 21d of the manual valve valve body 21A, and is formed in a substantially polygonal shape (for example, a hexagon) in plan view. The manual operation portion 34b is configured such that a tool such as a wrench is engaged with the outer peripheral surface thereof, and the manual operation portion 34b of the safety valve body 22 can be rotated around the axis L1 by the tool. Further, the manual operation portion 34b of the safety valve body 22 is screwed into the manual valve body 21A, and can be displaced relative to the manual valve body 21A in one axial direction and the other with respect to the manual valve body 21A. It can be done.

  Further, the valve body 12 is provided with another second restriction plate 25 </ b> A in addition to the first restriction plate 25 which is the restriction plate 25. The second restricting plate 25A is a plate-like member formed in an L shape in a side view like the first restricting plate 25, and is disposed so as to cover the outer peripheral edge portion of the manual operation portion 34b of the valve body 22 for the safety valve. Has been. A predetermined interval X1 (> X) is provided between the second restricting plate 25A and the outer peripheral edge of the manual operation unit 34b. The second restricting plate 25A configured in this way restricts the movement amount of the axial direction of the safety valve body 22 relative to the valve body 12 to a distance X1 or less, and moves the safety valve body 22 when the safety valve body 22 is moved. The valve body 22 for safety valve is prevented from coming off from the valve body 21. The interval X1 is set to be at least smaller than the length in which the manual operation portion 34b of the safety valve body 22 is inserted into the inner hole 30, and in this embodiment, the seal member 43 is not detached from the inward flange portion 21g. Set to distance. Therefore, even if the manual operation part 34b of the valve body 22 for the safety valve moves about the distance X1, it is inserted into the inner hole 30 while maintaining the sealed state with the inward flange part 21g.

<Function of valve device>
1 A of valve apparatuses comprised in this way have the function of both the manual valve function regarding the atmosphere open passage 17 and a safety valve function similarly to the valve apparatus 1 of 1st Embodiment, and open and close the tank channel | path 13 as above-mentioned. It also has the function of the manual valve 14. Below, those functions are demonstrated.

  Also in the valve device 1A, the distal end portion 21a of the manual valve valve body 21A is seated on the seat member 20, and the valve passage 31d is closed. In the state where the tip portion 21a is seated on the seat member 20, the tank side port 26 and the discharge passage 39 are connected, but the tip portion 22a of the valve body 22 for the safety valve is inserted into the insertion portion 30b, and the discharge is performed. The passage 39 is blocked. Thus, in the valve device 1A, the valve passage 31d and the discharge passage 39 are closed by the valve bodies 21 and 22 in the initial state. If the manual operation part 34b of the manual valve body 21A or the safety valve body 22 is turned from this state, or if the glass ball 35 of the valve device 1 exceeds a predetermined temperature, the valve passage 31d and the discharge passage 39 are opened. Each case will be described below.

  First, a manual valve function for opening and closing the valve passage 31d by manual operation, that is, connecting the tank side port 26 to the filling port 41 and the output port 42 by manual operation will be described. In the valve device 1A, the manual valve valve body 21A can be moved in one axial direction by turning the manual valve valve body 21A to one around the axial line using a tool (see FIG. 6). By moving, the distal end portion 21a of the manual valve valve body 21A is separated from the seat member 20, and the valve passage 31d is opened. As a result, the tank-side port 26 is connected to the filling port 41 and the output port 42.

  As described above, the filling port 41 is connected to the filling passage 15, and the output port 42 is connected to the output passage 16. The tank side port 26 is connected to the tank passage 13. Therefore, the tank passage 13 is connected to the filling passage 15 and the output passage 16 by opening the valve passage 31d, so that the gas can be filled in the tank 2 or the gas in the tank 2 can be output to the gas consumer. .

  Further, by continuing to rotate the manual valve body 21A around one axis, the distal end portion 21a of the manual valve body 21A can be further separated from the seat member 20, and the opening degree of the valve passage 31d can be increased. If the manual valve valve body 21A is continuously rotated around one axis, the manual operation portion 21d eventually hits the restriction plate 25. Thereby, it is possible to stop the manual valve valve body 21A from moving further in one axial direction, and to prevent the manual valve valve body 21 from coming out of the valve hole 31.

  Further, in the valve device 1A, the manual valve valve body 21A can be moved in the other axial direction by turning the manual valve valve body 21A to the other around the axial line using a tool. By moving, the distal end portion 21a of the manual valve valve body 21A is eventually seated on the seat member 20, and the valve passage 31d is closed. Thereby, the tank side port 26, the filling port 41, and the output port 42 are shut off. That is, the tank passage 13 is cut off from the filling passage 15 and the output passage 16, and the tank 2 cannot be filled with gas or the gas in the tank 2 cannot be output to the gas consumer.

  Further, in the valve device 1A, the manual valve valve element 21A is used to open and close between the tank passage 13, the filling passage 15, and the output passage 16, and therefore, is different from the valve device 1 of the first embodiment. In this manner, the tank side port 26 is opened to the atmosphere. That is, in the valve device 1A, the manual operation portion 34b of the safety valve body 22 is manually operated to open the tank side port 26 to the atmosphere. That is, the safety valve body 22 can be moved in the axial direction by engaging the tool with the manual operation portion 34b and turning the safety valve body 22 in the axial direction (see FIG. 7). By moving, the distal end portion 22a of the valve element 22 for the safety valve is removed from the insertion portion 30b, the insertion portion 30b and the accommodation portion 30c are communicated, and the discharge passage 39 is opened. As a result, the tank-side port 26 is connected to the discharge port 28 and the air ahead through the discharge passage 39 and the valve space 31e. That is, the upstream portion and the downstream portion of the atmosphere opening passage 17 are connected. Thereby, the gas in the tank 2 can be discharged | emitted from the air release port 17a.

  Further, the valve device 1A has a safety valve function as described above, and when the ambient temperature of the valve device 1 rises to a predetermined temperature or higher, the discharge passage 39 is opened as in the valve device 1 of the first embodiment. As a result, the tank-side port 26 is connected to the discharge port 28 via the discharge passage 39 and the valve space 31e, and the gas in the tank 2 can be discharged from the atmosphere opening port 17a (see FIG. 8). In addition, about the detailed description regarding a safety valve function, the description of the valve apparatus 1 of 1st Embodiment is referred and it abbreviate | omits here.

  1 A of valve apparatuses comprised in this way have a manual valve function and a safety valve function similarly to the valve apparatus 1 of 1st Embodiment, and open and close between the tank channel | path 13, the filling channel | path 15, and the output channel | path 16. It also has the function of the manual valve 14. Therefore, since it is not necessary to provide the manual valve 14 separately from the valve device 1A, the number of parts constituting the plug 11 and the number of passages that can be formed in the plug 11 can be reduced, and the plug 11 can be downsized. Can do.

  In addition, the valve device 1 </ b> A of the second embodiment has the same effects as the valve device 1 of the first embodiment.

[Other forms]
The valve devices 1 and 1A of the first and second embodiments are used for tanks, but are not necessarily limited to tanks, and can be used for all devices involving gas flow. In the valve device 1A of the second embodiment, both the filling port 41 and the output port 42 are examples of the second port, but at least one port 41, 42 is connected to the valve passage 31d. Just do it.

  Further, in the valve devices 1 and 1A of the first and second embodiments, the glass ball 35 enclosing the liquid is adopted as the support 24 to constitute the glass ball type safety valve, but the glass ball 35 is not necessarily required. There is no. For example, instead of the glass ball 35, a support member or a rupturable plate made of molten metal may be used. In the case of a support member made of a molten metal, the support member is melted and discharged from the accommodating portion 30c when the temperature exceeds a predetermined temperature. As a result, the support of the safety valve body 22 is released, the safety valve body 22 moves in one axial direction, and the discharge passage 39 opens. On the other hand, in the case of a rupture disk, the gas pressure in the tank-side port 26 becomes equal to or higher than a predetermined pressure when the temperature exceeds a predetermined temperature, and the rupture disk is ruptured by being pushed by the safety valve valve body 22. By rupturing, the support of the safety valve body 22 is released, the safety valve body 22 moves in one axial direction, and the discharge passage 39 opens. As described above, various configurations can be applied to the support 24.

1,1A Valve device 2 Tank 12 Valve body (housing)
15a Filling port 16a Output port (outlet)
17a Air release port 20 Seat member 21 Valve body for manual valve 21A Valve body for manual valve 22 Valve body for safety valve 23 Biasing spring 24 Support body 25, 25A Restriction plate (regulation member)
26 Tank side port (1st port)
28 Release port (2nd port, 3rd port)
39 Discharge passage 41 Port for filling (second port)
42 Output port (2nd port)

Claims (6)

A housing in which a valve passage connecting the first port and the second port is formed;
A valve body for a manual valve provided in the housing so as to open and close the valve passage by manual operation and having a discharge passage connecting the first port to the atmosphere;
A valve body for a safety valve that is provided in the valve body for the manual valve so as to close the discharge passage and is movable in a direction to open the discharge passage;
A biasing spring provided in the valve body for the manual valve and biasing the valve body for the safety valve in a direction to open the discharge passage;
Provided in the manual valve body and supporting the safety valve body in a state in which the discharge passage is closed against the urging force of the urging spring. And a support body for releasing support for the valve body for the safety valve. A seat member provided on the housing and on which the valve body for the manual valve is seated;
The manual valve body closes the valve passage by sitting on the seat member, and opens the valve passage by leaving the seat member,
The valve device according to claim 1, wherein the safety valve body closes the discharge passage while being inserted into the discharge passage. The second port is connected to an air opening that is open to the atmosphere,
The valve device according to claim 2, wherein the discharge passage is connected to the second port. The housing has a third port connected to an air opening that is open to the atmosphere;
The first port is connected to a tank for storing gas,
The second port is connected to at least one of a filling port for filling the tank with the gas and an outlet for discharging the gas in the tank,
The discharge passage is connected to the atmosphere via the third port;
The valve device according to claim 2. The support is configured to be relatively displaceable in a direction to open the discharge passage with respect to the manual valve valve body by a manual operation,
The valve device according to claim 4, wherein the safety valve valve body is configured to open the discharge passage when the support body is displaced relative to the manual valve valve body. A regulating member that is provided in the housing and restricts a moving distance of the manual valve valve body to a predetermined distance or less when the manual valve valve body is moved in a direction in which the valve passage is opened;
The valve device according to any one of claims 2 to 5, wherein the manual valve body is inserted so as to maintain a sealed state with the housing even when the valve body is moved a predetermined distance.