JP5510142B2 - High-pressure shut-off valve, fuel cartridge, and fuel cell system - Google Patents

Description

  The present invention relates to a high-pressure shut-off valve that automatically closes a flow path when the pressure of a fluid flowing in the flow path increases, a fuel cartridge using the high-pressure shut-off valve, and a fuel cell system It is.

  In a fuel cell system, a power generation cell or the like using a fuel cartridge uses a pump when supplying fluid from the fuel cartridge to the power generation cell. However, an unintended high discharge pressure is generated from the fuel cartridge under high temperature conditions, and the pump may be damaged. Therefore, an emergency shut-off valve that cuts off communication with the pump when a high pressure is abnormal is required.

  Such an emergency shut-off valve is disclosed in Patent Document 1, for example. As shown in FIG. 10, the emergency shut-off valve disclosed in Patent Document 1 includes a valve chamber 505 having an inlet 502, an outlet 503, and an air hole 504, an opening / closing drive unit 506, a valve body 510, and the valve. The reset button 520 returns the state of the body 510 to the initial state. The opening / closing drive unit 506 is provided with a diaphragm 511 and a spindle 512. The valve body 510 is provided with a notch 514 having a concave shape, and a ball 513 is provided so as to be engaged between the notch 514 and the spindle 512.

  When the inflow pressure flowing in from the inflow port 502 is smaller than the atmospheric pressure, the ball 513 is engaged with the notch 514 of the valve body 510, and the valve body 510 is held in the state of FIG. At this time, the flow path is kept open. On the other hand, when the inflow pressure becomes larger than the atmospheric pressure, the diaphragm 511 is pushed up, and accordingly, the spindle 512 is pushed up. As a result, the engagement state between the notch 514 provided in the valve body 510 and the ball 513 is released, and the valve body 510 moves downward to block the flow path from the inlet 502 to the outlet 503. is there.

Japanese Utility Model Publication No. 62-2377

  Such an emergency shut-off valve requires a complicated mechanism for opening and closing the valve body, and there is a problem that the apparatus becomes large. In addition, when the fluid pressure fluctuates in the vicinity of the threshold value, the open / close state of the valve element becomes unstable, and thus it is necessary to provide a mechanism for maintaining the open state and the closed state. Therefore, there is a problem that the apparatus becomes larger.

  Therefore, an object of the present invention is to provide a high-pressure shut-off valve that realizes an emergency shut-off when a high-pressure abnormality occurs with a simple structure, a fuel cartridge using the high-pressure shut-off valve, and a fuel cell system.

  In order to solve the above problems, a high-pressure shutoff valve according to the present invention includes a housing having an inlet, an outlet, and an air release port, and a valve body slidably provided inside the housing. The valve body is provided with a communication path, and at normal times, the inlet and the outlet are communicated by a flow path including the communication path, and when the pressure of the fluid from the inlet is higher than normal, The valve body is slid to block the flow path.

  In the present invention, the valve body is preferably provided with a groove serving as the communication path. In this case, the groove acts as a flow path when the valve is in the open state, and when the valve is in the closed state, the groove can be communicated only with the outlet to prevent backflow of the fluid.

  In the present invention, it is desirable that the casing is provided with a groove that is a part of the flow path. In this case, by combining the valve body groove and the housing groove, the degree of freedom in designing the flow path is increased, and the low profile type can be supported.

  In the present invention, it is desirable that the valve body is provided with a hole serving as the communication path. In this case, the channel can be formed only by the valve body without providing the groove in the housing.

  In the present invention, it is preferable that the casing is cylindrical and the valve body is columnar. In this case, since the housing is not easily deformed even when the pressure of the fluid increases, the occurrence of gaps and fluid leakage can be prevented.

  In the present invention, it is desirable to provide a valve body return device between the valve body and the air release port on the inner wall of the housing. In this case, the valve body can be returned to the initial position after the pressure of the fluid increases and the valve body slides.

  In the fuel cartridge according to the present invention, it is desirable that the high-pressure shut-off valve is built in the outlet side. In the conventional fuel cell system, since the valve is large, the valve and the fuel cartridge are separately provided. In this case, since the valve can be made small, it can be easily incorporated into the fuel cartridge. .

  The fuel cell system according to the present invention preferably includes the high-pressure shut-off valve, a fuel cartridge, and a power generation cell, and the high-pressure shut-off valve is provided in a fuel supply path connecting the fuel cartridge and the power generation cell. . In this case, even if the discharge pressure of the fuel cartridge is increased, the pressure is not transmitted from the outlet of the fuel cartridge to the end, so that the device and the power generation cell in the next stage are not broken.

  According to the present invention, it is possible to realize an emergency shut-off when a high pressure is abnormal with a simple structure in which the valve body is slid using the pressure of the fluid. Furthermore, once the emergency shut-off is performed, the closed state can be maintained even if the fluid pressure slightly fluctuates near the threshold value.

It is a center sectional view of the high-pressure cutoff valve by Embodiment 1 of the present invention. It is a disassembled perspective view of the high-pressure cutoff valve of Embodiment 1. FIG. 6 is a central cross-sectional view of a high pressure cutoff valve according to Modification 1 of Embodiment 1. It is the center cross-sectional view of the high-pressure cutoff valve by Embodiment 2 of this invention, a longitudinal cross-sectional view, and the perspective view of a valve body. It is the center sectional drawing of the high-pressure cutoff valve by Embodiment 3 of this invention, and the perspective view of a valve body. 6 is a central cross-sectional view of a high-pressure shut-off valve according to Modification 1 of Embodiment 3. FIG. FIG. 10 is a central cross-sectional view of a high-pressure shut-off valve according to Modification 2 of Embodiment 3. It is a block diagram of the fuel cell system by Embodiment 4 of this invention. 6 is a block diagram of a fuel cell system according to Embodiment 4. FIG. It is a center section schematic diagram of an emergency shut-off valve explaining a prior art.

  Below, the high-pressure cutoff valve concerning the embodiment of the present invention is explained.

(Embodiment 1)
FIG. 1 is a central sectional view of a high-pressure shut-off valve 100 according to the first embodiment. The high-pressure shut-off valve 100 of this embodiment is used as a high-pressure shut-off valve provided at the rear stage of the fuel cartridge in the fuel cell system. In the present specification, the cross-sectional view is schematically shown for easy understanding.

  FIG. 2 is an exploded perspective view of the high-pressure cutoff valve 100. Hereinafter, description will be made with reference to FIGS. 1 and 2.

  The high-pressure cutoff valve 100 according to the first embodiment includes a housing 1 and a valve body 10. The casing 1 has a low profile and a rectangular parallelepiped shape, and is made of, for example, PPS resin. The housing 1 is composed of a lower housing 11, an intermediate housing 12 and an upper housing 13 which are sequentially laminated and fixed on the upper surface by an adhesive, and includes a first valve chamber 5a and a second valve chamber 5b therein. It has the valve chamber 5 which becomes.

  The lower casing 11 constituting a part of the casing 1 has an inlet 2 passing through the lower casing and communicating with the first valve chamber 5a, and a flow passing through the center of the lower casing and communicating with the second valve chamber 5b. A housing groove 11 a is formed so as to communicate the outlet 3 with the first valve chamber 5 a and the second valve chamber 5 b of the intermediate housing 12.

  The intermediate casing 12 is formed in a frame shape that is greatly hollowed in the middle. A space surrounded by the middle casing 12, the lower casing 11, and the upper casing 13 becomes the valve chamber 5. In the vicinity of the center of the frame-like portion of the intermediate casing 12, a stopper 6 protruding in a convex shape in the inner direction of the valve chamber 5 is provided. Thus, the valve chamber 5 is divided into a first valve chamber 5a and a second valve chamber 5b.

  Further, an air release port 4 is provided in the intermediate casing 12. The air release port 4 is configured by a hole provided at the end of the frame-like portion of the intermediate casing 12 on the second valve chamber 5b side, and connects the second valve chamber 5b and the atmosphere.

  The upper housing 13 is a single plate having no holes or grooves.

  The valve body 10 has a rectangular parallelepiped shape having a thickness equivalent to that of the intermediate rod body 12, and a valve body groove 10a is formed at the center of the bottom portion. The valve body 10 is made of, for example, EPDM (ethylene propylene diene rubber). The valve body 10 is provided in the second valve chamber 5b so as to be slidable from the stopper 6 side to the atmosphere release port 4 side.

  The normal position of the valve body 10 is the position closest to the stopper 6 in the second valve chamber 5b, and the valve body groove 10a is formed between the housing groove 11a and the outlet 3 as shown in FIG. Communicates with both. At this time, the flow path of the high-pressure shutoff valve 100 is configured to reach from the inlet 2 to the outlet 3 via the first valve chamber 5a, the housing groove 11a, and the valve groove 10a. Open state.

  On the other hand, when the pressure of the fluid from the inflow port becomes higher than usual and the valve body 10 slides to the atmosphere release port 4 side, the valve body groove 10a is formed in the outflow port as shown in FIG. 3 is in communication with the housing groove 11a. At this time, since the flow path is blocked, the valve is closed.

  Here, the operation principle of the valve is shown. The force applied to the valve body 10 includes a force F1 applied to the valve body 10 from the inlet 2 side, a force F2 applied to the valve body 10 from the atmosphere release port 4 side, and a frictional force of the valve body 10 (hereinafter referred to as sliding resistance). F3.

  F1 is expressed as the product of the inflow pressure P1 and the pressure receiving area S1 of the valve body. F2 is expressed as the product of the atmospheric pressure P2 and the pressure receiving area S2 of the valve body 10. Accordingly, the necessary conditions for the valve body 10 to slide toward the atmosphere release port 4 are: the inflow pressure and the force F1 due to the pressure receiving area> the atmospheric pressure and the force F2 + sliding resistance F3 due to the pressure receiving area.

  The operation of the valve is shown below. The open state is maintained until the fluid inflow pressure and the force F1 due to the pressure-receiving area exceed the predetermined atmospheric pressure and the force F2 + sliding resistance F3 due to the pressure-receiving area.

  On the other hand, when the pressure of the fluid from the inlet becomes higher than normal and the fluid inflow pressure and the force F1 due to the pressure receiving area exceed a predetermined threshold, the valve body 10 is released to the atmosphere while maintaining the open state. Slide toward the mouth 4 side. Further, when the valve body 10 slides to the vicinity of the atmosphere opening 4, the communication between the housing groove 11 a and the valve body groove 10 a is interrupted, so that the flow path to the outlet 3 is blocked.

  Further, once the flow path is shut off, the closed state of the valve is maintained even if the fluid pressure slightly fluctuates in the vicinity of the threshold value.

  In this embodiment, the valve body groove | channel 10a used as a part of flow path for connecting the inflow port 2 and the outflow port 3 to the valve body 10 is provided. With this configuration, the valve body groove 10a acts as a flow path when the valve is open, and when the valve is closed, the valve body groove 10a communicates only with the outflow port 3 so that the fluid flows backward. Can be prevented.

  In the present embodiment, a housing groove 11 a is provided which is a part of a flow path for allowing the inflow port 2 and the outflow port 3 to communicate with the housing 1. Since it comprises in this way, the freedom degree of the design of a flow path goes up by combining the housing groove 11a with the valve body groove | channel 10a, and it can respond to a low profile type.

  In the present embodiment, the shape of the valve body groove is a rectangular parallelepiped, but is not limited thereto. Normally, the valve body groove communicates with the inlet and outlet, and when the pressure of the fluid from the inlet becomes higher than usual and the valve body slides to the atmosphere release port side, the valve body groove flows. The length and shape may be designed so as to communicate with the outlet but not to the inlet.

(Modification 1 of Embodiment 1)
FIG. 3 is a central cross-sectional view of the high-pressure cutoff valve 200 according to the first modification of the first embodiment. The high-pressure shut-off valve 200 according to the first modification includes a housing 21 and a valve body 20.

  The casing 21 has a low profile and a rectangular parallelepiped shape, and is made of, for example, PPS resin. The housing 21 is composed of a lower housing 15, an intermediate housing 16 and an upper housing 17 which are sequentially laminated and fixed on the upper surface by an adhesive, and includes a first valve chamber 25a and a second valve chamber 25b therein. It has the valve chamber 25 which becomes.

  The lower casing 15 constituting a part of the casing 21 has an inlet 22 passing through the lower casing and communicating with the first valve chamber 25a, and a flow passing through the center of the lower casing and communicating with the second valve chamber 25b. An outlet 23 is formed.

  The intermediate casing 16 is formed in a frame shape that is greatly hollowed in the middle. A space surrounded by the intermediate casing 16, the lower casing 15, and the upper casing 17 is a valve chamber 25. In the vicinity of the center of the frame-shaped portion of the intermediate casing 16, a stopper 6 protruding in a convex shape in the inner direction of the valve chamber 25 is provided. Thus, the valve chamber 25 is divided into a first valve chamber 25a and a second valve chamber 25b.

  The intermediate casing 16 is provided with an air release port 24. The air release port 24 is configured by a hole provided at an end of the frame-like portion of the intermediate casing 16 on the second valve chamber 25b side, and connects the second valve chamber 25b and the atmosphere.

  The upper casing 17 is a single plate having no holes or grooves.

  The valve body 20 has a rectangular parallelepiped shape having a thickness equivalent to that of the intermediate casing 16, and a valve body hole 20b is formed therein. The valve body hole 20b forms a straight hole in the longitudinal direction from the center of the side surface of the valve body 20, bends at right angles to the bottom surface near the center of the valve body 20, and penetrates to the bottom surface to form a part of the flow path. To do.

  The valve body 20 is made of, for example, EPDM (ethylene propylene diene rubber). The valve body 20 is provided in the second valve chamber 25b so as to be slidable from the stopper 26 side to the atmosphere release port 24 side.

  The normal position of the valve body 20 is the position closest to the stopper 26 in the second valve chamber 25b, and the valve body hole 20b communicates with the outlet 23 as shown in FIG. . At this time, the flow path of the high-pressure cutoff valve 200 is configured to reach the outlet 23 from the inlet 22 via the valve chamber 25 and the valve body hole 20b, and the valve is in an open state.

  On the other hand, when the pressure of the fluid from the inflow port becomes higher than usual and the valve body 20 slides to the atmosphere release port 24 side, as shown in FIG. 23 is not in communication. At this time, since the flow path is blocked, the valve is closed.

  In the present modification, a valve body hole 20b is provided that is part of a flow path for communicating the inlet 22 and the outlet 23 with the valve body 20. Since it comprises in this way, a groove | channel is not provided in the housing | casing 21, but a flow path can be formed only with the valve body 20, and this invention is realizable with a simpler structure.

(Embodiment 2)
FIG. 4 is a central cross-sectional view, a vertical cross-sectional view, and a perspective view of the valve body 30 of the high-pressure cutoff valve 300 according to the second embodiment. As shown in FIG. 4A, the high-pressure shutoff valve 300 of this embodiment includes a housing 31 and a valve body 30.

  The casing 31 is formed in a cylindrical shape, and is made of, for example, PPS resin. The casing 31 is formed of a cylindrical portion and two discs that close both ends of the cylinder. The housing 31 is provided with an inlet 32 at the center of one disk, an air release port 34 at the center of the other disk, and an outlet 33 at a cylindrical portion, and has a valve chamber 35 inside.

  FIG. 4B is a cross section obtained by cutting FIG. 4A along the plane AA ′. As shown in FIG. 4B, a stopper 36 protruding in a convex shape toward the inside of the valve chamber 35 is provided near the inlet 32 of the housing 31. Thus, the valve chamber 35 is divided into a first valve chamber 35a and a second valve chamber 35b.

  The valve body 30 is configured in a columnar shape having an outer diameter equivalent to the inner diameter of the cylindrical casing 31. As shown in FIG. 4C, the valve body 30 has a circumferential groove 37 b formed around the outer circumferential surface of the valve body 30 in the circumferential direction, and a circumferential groove formed on the outer circumferential surface of the valve body 30. Two kinds of valve body grooves 37 are formed, which are linear grooves 37a formed in parallel with the axial direction of the cylinder from 37b. The valve body 30 is made of, for example, EPDM (ethylene propylene diene rubber).

  The valve body 30 is provided in the second valve chamber 35b in a slidable state from the stopper 36 side to the atmosphere release port 34 side. At this time, the valve body 30 is provided at a rotational position where the valve body groove 37 and the outflow port 33 do not communicate with each other even when the valve body 30 slides toward the atmosphere release port 34.

  The normal position of the valve body 30 is the position on the stopper 36 side in the second valve chamber 35b, and the valve body groove 37 communicates with the outlet 33 as shown in FIG. At this time, the flow path of the high-pressure cutoff valve 300 is configured so as to reach the outlet 33 through the valve chamber 35 and the valve body groove 37 from the inlet 32, and the valve is in an open state.

  On the other hand, when the pressure of the fluid from the inflow port becomes higher than usual and the valve body 30 slides to the atmosphere release port 34 side, the valve body groove 37 is not in communication with the outflow port 33. . At this time, since the flow path is blocked, the valve is closed.

  Here, the operation principle of the valve is shown. The force applied to the valve body 30 includes a force F1 applied to the valve body 30 from the inlet 32 side, a force F2 applied to the valve body 30 from the atmosphere release port 34 side, and a frictional force of the valve body 30 (hereinafter referred to as sliding resistance). F3.

  F1 is expressed as the product of the inflow pressure P1 and the pressure receiving area S1 of the valve body. F2 is expressed as the product of the atmospheric pressure P2 and the pressure receiving area S2 of the valve body 30.

  Thus, the necessary conditions for the valve body 30 to slide toward the atmosphere release port 34 are: inflow pressure and force F1 due to the pressure receiving area> atmospheric pressure and force F2 + sliding resistance F3 due to the pressure receiving area.

  The operation of the valve is shown below. The open state is maintained until the fluid inflow pressure and the force F1 due to the pressure-receiving area exceed the predetermined atmospheric pressure and the force F2 + sliding resistance F3 due to the pressure-receiving area.

  On the other hand, when the pressure of the fluid from the inlet becomes higher than normal and the fluid inflow pressure and the force F1 due to the pressure receiving area exceed a predetermined threshold value, the valve body 30 is released to the atmosphere while maintaining the open state. Slide toward the mouth 34 side. Further, when the valve body 30 slides to the vicinity of the air release port 34, the communication between the valve body groove 37 and the outlet 34 is interrupted, so that the flow path to the outlet 34 is blocked.

  Further, once the flow path is shut off, the closed state of the valve is maintained even if the fluid pressure slightly fluctuates in the vicinity of the threshold value.

  In this embodiment, the housing 31 is provided as a cylindrical shape, and the valve body 30 is provided as a columnar shape. Since it comprises in this way, the housing 31 becomes difficult to deform | transform with a fluid pressure. As a result, a gap is less likely to be created between the valve body 30 and the housing 31, and fluid is less likely to leak from the atmosphere release port 34, the inlet 32, and the outlet 33.

(Embodiment 3)
FIG. 5 is a central sectional view of the high-pressure shutoff valve 400 according to the third embodiment and a perspective view of the valve body 40. As shown in FIG. 5A, the high-pressure shutoff valve 400 of this embodiment includes a housing 41 and a valve body 40.

  The casing 41 is configured in a cylindrical shape, and is formed of, for example, PPS resin. The casing 41 is formed of a cylindrical portion and two discs that close both ends of the cylinder. The housing 41 is provided with an inlet 42 at the center of one disk, an air release port 44 at the center of the other disk, and an outlet 43 at a cylindrical portion, and has a valve chamber 45 inside.

  The valve body 40 has a cylindrical shape having an outer diameter slightly smaller than the inner diameter of the cylindrical housing 41. As shown in FIG. 5B, the valve body 40 is formed with a valve body groove 40a, a valve body hole 40b, and a plurality of ring bodies 40c having sealing properties. The valve body 40 is made of, for example, EPDM (ethylene propylene diene rubber). The valve body 40 is provided in the valve chamber 45 so as to be slidable from the inlet 42 side to the atmosphere release port 44 side.

  The valve body hole 40b forms a straight hole in the longitudinal direction from one main surface of the cylinder, bends at right angles to the outer peripheral direction near the center of the valve body 40, and penetrates to the outer peripheral surface to form a part of the flow path. Is.

  The valve body groove 40a is formed in the outer circumferential portion of the valve body 40 so as to make a round in the circumferential direction, and communicates with a valve body hole 40b provided penetrating to the outer peripheral surface. Since it is comprised in this way, the valve body 40 can be provided in arbitrary rotation positions.

  The ring body 40 c is a convex portion that has an outer diameter equivalent to the inner diameter of the cylindrical housing 41 and is provided around the outer peripheral portion of the valve body 40 in the circumferential direction. Two ring bodies 40c are formed on the outer peripheral portion from the valve body groove 40a to the inlet 42 side, and one is formed on the outer peripheral portion on the opposite side. The ring body 40c is integrally formed of the same material as the valve body 40, for example.

  Since it is comprised in this way, since the area which the valve body 40 contacts with the housing 41 reduces, the sliding resistance of the valve body 40 reduces. Further, since the ring body 40c has a sealing property, the fluid pressures at the inlet 42, the outlet 43, and the atmosphere release port 44 can be reliably separated, and the operation of the valve body 40 is set more precisely. be able to.

  Here, the operation principle of the valve is shown. The force applied to the valve body 40 includes the force F1 applied to the valve body hole 40b provided in the valve body 40 from the inlet 42 side, the force F2 applied to the valve body 40 from the atmosphere release port 44 side, and the friction of the valve body 40. Force (hereinafter referred to as sliding resistance) F3.

  F1 is expressed as the product of the inflow pressure P1 and the pressure receiving area S1 of the valve body hole 40b. F2 is expressed as the product of the atmospheric pressure P2 and the pressure receiving area S2 of the valve body 30.

  Thus, the necessary conditions for the valve body 30 to slide toward the atmosphere release port 34 are: inflow pressure and force F1 due to the pressure receiving area> atmospheric pressure and force F2 + sliding resistance F3 due to the pressure receiving area.

  The operation of the valve is shown below. The open state is maintained until the fluid inflow pressure and the force F1 due to the pressure-receiving area exceed the predetermined atmospheric pressure and the force F2 + sliding resistance F3 due to the pressure-receiving area.

  On the other hand, when the pressure of the fluid from the inlet becomes higher than usual and the fluid inflow pressure and the force F1 due to the pressure receiving area exceed a predetermined threshold, the valve body 40 is released to the atmosphere while maintaining the open state. Slide toward the mouth 44 side. Further, when the valve body 40 slides to the vicinity of the air release port 44, the communication between the valve body hole 40b and the outflow port 44 is interrupted, so that the flow path to the outflow port 34 is blocked.

  Further, once the flow path is shut off, the closed state of the valve is maintained even if the fluid pressure slightly fluctuates in the vicinity of the threshold value.

  In the present embodiment, the ring body 40c is integrally molded from the same material as the valve body, but is not limited thereto. For example, they may be formed individually or from different materials.

  In the present embodiment, the number of ring bodies 40c is not limited to this. If the number is reduced as compared with this modification, it will not function as a valve, which causes a problem.

(Modification 1 of Embodiment 3)
FIG. 6 is a central cross-sectional view of a high-pressure shutoff valve 400A according to Modification 1 of Embodiment 3. The same parts as those in the third embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The high-pressure shut-off valve 400A of this modification is composed of a cylindrical housing 41 and a columnar valve body 40, and includes a return device. In this return device, a thin film 45 having a sealing property is provided between the valve body 40 and the atmosphere release port 44 in the inner wall of the housing 41.

  The thin film 45 is bent by being pushed out to the atmosphere release port 44 side by the valve body 40 when the pressure of the fluid from the inlet becomes higher than usual. With this configuration, when the pressure of the fluid increases and the pressure returns to the normal state after the valve body slides to the atmosphere release port 44 side, the valve body is moved to the initial position by the elasticity of the thin film 45. You can return to the direction. Further, since the thin film 45 has a sealing property, the liquid is prevented from leaking from the air release port 44.

(Modification 2 of Embodiment 3)
FIG. 7 is a central cross-sectional view of a high-pressure cutoff valve 400B according to Modification 2 of Embodiment 3. The same parts as those in the third embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The high-pressure shut-off valve 400B of this modification is composed of a cylindrical housing 41 and a columnar valve body 40, and includes a return device. In this return device, a spring 46 is provided in the valve chamber of the housing 41 between the valve body 40 and the air release port 44. With this configuration, the pressure of the fluid from the inlet becomes higher than usual, and after the valve body 40 slides toward the atmosphere release port 44 while compressing the spring 46, the pressure is returned to the normal state. When returning, the valve body 40 returns to the direction of the initial position due to the elasticity of the spring 46.

  In the present modification, the condition under which the valve body 40 slides can be easily changed by changing the pressure applied by the spring 46. Further, the provision of the ring body 40c is particularly effective because the sliding resistance of the valve body 40 is reduced.

  In the above-described modification, the return device is the thin film 45 or the spring 46, but is not limited thereto. For example, a manual return means may be used in which the valve element 40 is pushed in from the outside of the atmosphere release port 44 with a rod-like member and returned to the initial state.

(Other examples)
The high-pressure shut-off valve according to the present invention is not limited to the above embodiment, and can be variously modified within the scope of the gist.

  In the said embodiment, although the housing is comprised from PPS, it is not restricted to this. For example, a resin other than PPS may be used.

  In the said embodiment, although the valve body is comprised from EPDM (ethylene propylene diene rubber), it is not restricted to this. For example, an elastic resin such as polyethylene or elastomer may be used. At this time, it is desirable that the surface of the valve body has a sealing property.

  In the above embodiment, the stopper is provided inside the valve chamber, but the present invention is not limited to this. The stopper is preferably provided for the return positioning when the initial position of the valve body is set or when the return device is provided, but may not be provided when not necessary.

(Embodiment 4)
FIG. 8 is a block diagram of a fuel cell system according to the fourth embodiment. The fuel cell system according to the present embodiment includes a fuel cartridge, a high-pressure cutoff valve, a pump, and a power generation cell.

  The high-pressure shutoff valve of the present invention is provided on the outlet side of the fuel cartridge. The pump is provided on the outlet side of the high-pressure shut-off valve, and plays a role of adjusting the flow rate of the fluid supplied to the power generation cell. The power generation cell is provided on the outlet side of the pump.

  In the present embodiment, the high-pressure shut-off valve is provided in the fuel supply path connecting the fuel cartridge and the power generation cell. With this configuration, even if the discharge pressure of the fuel cartridge increases, the pressure is not transmitted from the outlet of the fuel cartridge to the front, so that the pump and power generation cell in the next stage are not broken.

  Furthermore, since the high-pressure shut-off valve becomes small, it can be easily incorporated into the fuel cell system, and the fuel cell system can be further downsized.

  Further, a high-pressure shut-off valve may be directly built in the outlet side inside the fuel cartridge (see FIG. 9). In the conventional fuel cell system, since the high-pressure shut-off valve is large, a high-pressure shut-off valve and a fuel supply cartridge are separately provided. Therefore, the fuel cell system can be further downsized.

100, 200, 300, 400, 500 ... High pressure shut-off valve 1, 21, 31, 41 ... Housing 2, 22, 32, 42, 502 ... Inlet 3, 23, 33, 43, 503 ... Outlet 4, 24, 34, 44, 504 ... Air release port 5, 25, 35, 45, 505 ... Valve chamber 5a, 25a, 35a ... First valve chamber 5b, 25b, 35b ... Second valve chamber 6, 26, 36 ... Stopper DESCRIPTION OF SYMBOLS 11, 15 ... Lower housing 11a ... Housing groove 12, 16 ... Middle housing 13, 17 ... Upper housing 10, 20, 30, 40, 510 ... Valve body 10a, 37, 40a ... Valve body groove 20b, 40b ... Valve body hole 37a ... Linear groove 37b ... Circumferential groove 40c ... Ring body 45 ... Thin film 46 ... Spring

Claims (8)

A housing having an inlet, an outlet, and an air release port, and a valve body slidably provided inside the housing;
The valve body is provided with a communication path,
Normally, the inflow port and the outflow port are communicated by a flow path including the communication path,
A high-pressure shut-off valve, wherein when the pressure of fluid from the inlet is higher than usual, the valve body is slid to shut off the flow path.   The high-pressure shut-off valve according to claim 1, wherein the valve body is provided with a groove serving as the communication path.   The high-pressure shut-off valve according to claim 1 or 2, wherein the casing is provided with a groove that is a part of the flow path.   The high-pressure cutoff valve according to claim 1 or 2, wherein the valve body is provided with a hole serving as the communication path.   The high-pressure shut-off valve according to any one of claims 1 to 4, wherein the casing is cylindrical and the valve body is columnar.   The high pressure shut-off valve according to any one of claims 1 to 5, wherein a return device for a valve body is provided between the valve body and the atmosphere release port on the inner wall of the housing.   A fuel cartridge, wherein the high-pressure shut-off valve according to any one of claims 1 to 6 is built in an outlet side.   7. The high-pressure cutoff valve according to claim 1, a fuel cartridge, and a power generation cell, wherein the high-pressure cutoff valve is provided in a fuel supply path connecting the fuel cartridge and the power generation cell. A fuel cell system.

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