Vehicle high-pressure hydrogen storage cylinder combination valve with integrated manual valve

Abstract

The invention relates to the field of high-pressure hydrogen storage, and particularly discloses a vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve. Comprising a valve body and an adjusting rod, and the valve body is provided with an air inlet, an air outlet, a manual valve cavity, an inflation circuit flow channel, a TPRD flow channel and a TPRD cavity; a bottom sleeve and a threaded rod are arranged in the manual valve cavity, and a channel capable of being communicated with the air inlet and outlet is formed between the bottom sleeve and the adjusting rod. A sealing structure is arranged in the manual valve cavity and located on the side, away from the air inlet and outlet, of the air inflation channel. The threaded rod can rotate relative to the valve body and is in threaded fit with the adjusting rod, and the elastic element is used for pushing the sealing sliding block to the side close to the bottom sleeve. According to the vehicle high-pressure hydrogen storage cylinder combination valve with the integrated manual valve, the problem that a valve cannot be repeatedly closed and opened is solved.

Description

Technical Field

[0001] The invention relates to the field of high-pressure hydrogen storage, and in particular to a vehicle-used high-pressure hydrogen storage cylinder combination valve with an integrated manual valve. Background Art

[0002] Hydrogen fuel cell vehicles are an important development direction of new energy vehicles. Bottle-mouth valves are key parts of hydrogen fuel cell hydrogen supply systems. Existing bottle-mouth valves are respectively provided with manual stop valves and manual relief valves to meet the functional requirements of manual opening and closing and safe pressure relief of combination valves. In order to install manual stop valves and manual relief valves, valve cavities and flow channels need to be reserved for them on the valve body during valve body molding, which undoubtedly increases the workload of valve assembly. After the manual stop valve and manual relief valve are installed, the installation position needs to be sealed to meet high pressure strength, which makes the valve assembly difficult and costly, and the overall weight and volume of the valve are difficult to further reduce.

[0003] Although there is a self-sealing bottle mouth valve as shown in application number CN201420386714.6, which is provided with a valve body, an air inlet hole is provided at the lower end of the valve body, an air outlet hole is provided on the side of the valve body, a valve stem is provided in the valve body, a sealing seat is provided at the lower end of the valve stem, a sealing cone surface is provided in the air inlet, a through hole is provided in the center of the valve stem, a piston cavity is provided at the upper end of the valve body, a piston is provided in the piston cavity, a return spring is provided between the piston and the bottom of the piston cavity, the cross-sectional area of ​​the piston is larger than the cross-sectional area of ​​the sealing seat, a connecting seat is also provided at the upper end of the valve body, a push rod is provided in the connecting seat, a push pin is provided at the lower end of the push rod, a threaded sleeve is provided in the center hole of the piston, a membrane ring is provided between the lower end of the threaded sleeve and the upper end of the push rod, a diaphragm is provided on the membrane ring, a return spring is also provided between the lower end of the push rod and the threaded sleeve, and an electromagnet is provided at the upper end of the connecting seat.

[0004] Although the above-mentioned bottle mouth valve has a self-sealing structure, the diaphragm of the bottle mouth valve is disposable. After being punctured, the valve is in a normally open state and the diaphragm needs to be replaced to seal again. Replacing the diaphragm also requires professionals, which is inconvenient for drivers. Summary of the invention

[0005] The present invention is intended to provide a vehicle-used high-pressure hydrogen storage cylinder combination valve with an integrated manual valve to solve the problem that the valve cannot be repeatedly closed and opened.

[0006] To achieve the above object, the present invention adopts the following technical solution: a vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve,

[0007] The utility model comprises a valve body and an adjusting rod, and is characterized in that: the valve body is provided with an air inlet and an outlet, a manual valve cavity, an air charging path flow channel, a TPRD flow channel and a TPRD cavity, the TPRD flow channel and the TPRD cavity are connected, the adjusting rod is located in the manual valve cavity and slides with the valve body in the axial direction, the adjusting rod abuts against the air inlet and an outlet and seals the air inlet and an outlet; a bottom sleeve and a threaded rod are provided in the manual valve cavity, the bottom sleeve is sleeved on the adjusting rod and slides with the adjusting rod in the axial direction, a channel which can be connected with the air inlet and an outlet is formed between the bottom sleeve and the adjusting rod, and the channel is connected with the air charging path flow channel at the same time; a sealing structure for sealing the right part of the channel is provided in the manual valve cavity, the sealing structure is located on the side of the air charging path flow channel away from the air inlet and an outlet, and the sealing structure can move with the adjusting rod to the side away from the air inlet and an outlet; the threaded rod can rotate relative to the valve body, the threaded rod is threadedly matched with the adjusting rod, the elastic element is located between the threaded rod and the sealing slider and is used to push the sealing slider to the side close to the bottom sleeve.

[0008] The beneficial effects of this program are:

[0009] Furthermore, a connecting hole is provided between the air inlet and outlet and the manual valve cavity, the diameter of the connecting hole is smaller than the diameter of the air inlet and outlet, and the air inlet and outlet are connected to the manual valve cavity through the connecting hole, and the end of the adjusting rod abuts against and seals the connecting hole.

[0010] The beneficial effects of this program are:

[0011] 1. After the combination valve in this scheme is installed, the gas charging path and TPRD flow channel are connected to the hydrogen storage cylinder. Initially, the adjustment rod in this scheme is located in the manual cavity, and the inlet and outlet are sealed under the action of the threaded rod to prevent hydrogen from leaking from the inlet and outlet. The sealing structure seals the gap between the bottom sleeve and the adjustment rod to prevent hydrogen from leaking from the side of the bottom sleeve away from the inlet and outlet.

[0012] When the valve needs to be opened, the threaded rod can be rotated to slide the regulating rod to the side away from the inlet and outlet, so that the regulating rod opens the inlet and outlet, and hydrogen flows out through the charging path flow channel, channel and inlet and outlet; when the valve needs to be closed, the threaded rod can be rotated in the opposite direction to slide the regulating rod in the opposite direction and reseal the inlet and outlet. Therefore, the combined valve in this scheme can realize the opening and closing of the valve only by rotating the threaded rod, and there is no need to set a manual stop valve.

[0013] 2. After the air inlet and outlet are connected with the charging path flow channel, when the adjusting rod is continued to be adjusted to the side away from the air inlet and outlet, the sealing structure can move to the side away from the air inlet and outlet along with the adjusting rod, so that the channel is connected with the charging path flow channel while also connected with the TPRD flow channel, that is, the air inlet and outlet are connected with the charging path flow channel and the TPRD flow channel at the same time, so that when the hydrogen storage cylinder is inflated, hydrogen can enter the hydrogen storage cylinder from the charging path flow channel and the TPRD flow channel at the same time, effectively improving the inflation speed.

[0014] 3. During the entire inflation and deflation process, the TPRD flow channel is connected to the TPRD cavity. When the temperature and pressure in the hydrogen storage cylinder are too high, the fusible alloy connected to the TPRD cavity will melt or the glass bubble will break, and the gas can be released to avoid explosion.

[0015] Furthermore, one end of the adjustment rod close to the air inlet and outlet is an arc-shaped surface.

[0016] The beneficial effect of this solution is that the adjustment rod in this solution can better seal the air inlet and outlet.

[0017] Furthermore, the sealing structure comprises a first sealing ring, and the first sealing ring is sleeved on the adjusting rod.

[0018] The beneficial effects of this solution are: the first sealing ring can be an O-ring, which is low in cost and easy to install.

[0019] Furthermore, a second sealing ring is provided between the bottom sleeve and the manual valve chamber.

[0020] The beneficial effect of this solution is that the second sealing ring can further prevent hydrogen leakage.

[0021] Furthermore, the sealing structure includes a sealing slider and an elastic element. The sealing slider is sleeved on the adjusting rod and abuts and seals against one end of the bottom sleeve away from the air inlet and outlet; the elastic element abuts against the bottom sleeve and is used to push the bottom sleeve toward the side close to the air inlet and outlet.

[0022] The beneficial effect of this solution is that the sealing slider is pressed against the bottom sleeve under the action of the elastic element to seal the bottom sleeve. Compared with the O-ring, the sealing slider in this solution is less prone to wear and tear, and can still maintain the sealing effect after long-term use, further reducing the risk of hydrogen leakage.

[0023] Furthermore, a limiting ring is sleeved on the outer side of the elastic element, and one end of the limiting ring close to the air inlet and outlet extends to a position opposite to the sealing slider and abuts against the bottom sleeve; a plurality of ventilation holes are arranged on the limiting ring.

[0024] The beneficial effect of this solution is that the limiting ring can limit the elastic element, and prevent the elastic element from shifting when the elastic element causes the sealing slider to abut against the bottom sleeve, so that the sealing slider maintains a better sealing effect.

[0025] Furthermore, a transition nut for limiting the limiting ring is provided on one side of the limiting ring away from the air inlet and outlet, and one end of the adjusting rod away from the air inlet and outlet extends into the transition nut and slidably cooperates with the transition nut.

[0026] The beneficial effect of this solution is that the transition nut can limit the axial movement of the bottom sleeve and the limit ring, so that the contact position of the O-ring and the manual valve cavity remains unchanged, maintaining a better sealing effect.

[0027] Furthermore, a top limiting sleeve is provided between the transition nut and the limiting ring. The top limiting sleeve is sleeved on the adjusting rod and two ends of the top limiting sleeve are respectively against the limiting ring and the transition nut.

[0028] The beneficial effect of this solution is that the transition nut limits the limiting ring through the top limiting sleeve.

[0029] Furthermore, the adjustment rod is coaxial with the air inlet and outlet, and one end of the adjustment rod facing the air inlet and outlet is a hard surface.

[0030] The beneficial effect of this solution is that compared with flexible materials such as elastic rubber, the hard surface in this solution is not easy to deform and wear after long-term use, thereby maintaining the sealing effect for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a front cross-sectional view of a valve body according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 AA section view in the figure;

[0033] Figure 3 A cross-sectional view of the combined valve after installation in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the state of discharging hydrogen in an embodiment of the present invention;

[0035] Figure 5 It is a schematic diagram of the state of the combination valve in the embodiment of the present invention when inflating;

[0036] Figure 6 for Figure 3 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0037] The following is further described in detail through specific implementation methods:

[0038] The reference numerals in the drawings of the specification include: valve body 1, air inlet and outlet 11, manual valve chamber 12, inflation path flow channel 13, TPRD flow channel 14, TPRD chamber 15, TPRD outlet 16, connecting hole 17, bottom sleeve 2, annular groove 21, inflation path flow channel hole 22, channel 23, adjusting rod 3, threaded groove 31, first sealing ring 32, sealing slider 4, elastic element 5, limit ring 6, vent hole 61, top limit sleeve 7, transition nut 8, threaded rod 9, outer sleeve nut 91.

[0039] Example

[0040] The embodiment is basically as follows Figure 1 , Figure 3 and Figure 6 As shown, a vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve includes a valve body 1 and an adjusting rod 3. A manual valve chamber 12 is provided in the valve body 1, and an opening communicating with the manual valve chamber 12 is provided at the right end of the valve body 1; an air inlet and outlet 11 is provided at the left end of the valve body 1, and a connecting hole 17 is provided between the air inlet and outlet 11 and the manual valve chamber 12. The aperture of the connecting hole 17 is smaller than the diameter of the air inlet and outlet 11, and the connecting hole 17 is used to connect the air inlet and outlet 11 with the manual valve chamber 12. The bottom of the valve body 1 is provided with an air filling path flow channel 13 and a TPRD flow channel 14, both of which are communicated with the manual valve chamber 12. Figure 2 As shown, a TPRD cavity 15 and a TPRD outlet 16 are provided on the upper side of the valve body 1, and the TPRD outlet 16 is communicated with the TPRD cavity 15. Specifically, the arrangement of the TPRD outlet 16 and the TPRD cavity 15 in this embodiment is the same as that in the prior art, and a fusible alloy melt or glass bubble is arranged between the TPRD cavity 15 and the TPRD outlet 16.

[0041] The adjusting rod 3 is transversely arranged in the manual valve chamber 12. The adjusting rod 3 is made of metal. The adjusting rod 3 is coaxial with the air inlet and outlet 11. The left end of the adjusting rod 3 is an arc-shaped surface and abuts against the end of the connecting hole 17 to seal the connecting hole 17. The manual valve chamber 12 is provided with a bottom sleeve 2, a top limit sleeve 7 and a threaded rod 9 from left to right. The bottom sleeve 2, the top limit sleeve 7 and the threaded rod 9 are all sleeved on the adjusting rod 3 and are coaxial with the adjusting rod 3. The bottom sleeve 2 is fixed to the valve body 1. Specifically, the bottom sleeve 2 in this embodiment is interference fit with the valve body 1. The diameter of the inner wall of the bottom sleeve 2 is larger than the diameter of the left end of the adjusting rod 3, so that a channel 23 for gas to pass through is formed between the bottom sleeve 2 and the adjusting rod 3. The left end of the manual valve chamber 12 is also an arc surface, and the left end of the bottom sleeve 2 is a plane. Therefore, a cavity is formed between the left end of the manual valve chamber 12 and the bottom sleeve 2. The channel 23 is connected to the cavity. Therefore, after the adjusting rod 3 slides to the right, the channel 23 is connected to the inlet and outlet 11. The outer wall of the bottom sleeve 2 is provided with an annular groove 21 opposite to the inflatable path flow channel 13. The bottom of the annular groove 21 is provided with a plurality of inflatable path flow channel holes 22 along the circumferential direction, which are used to connect the inflatable path flow channel 13 with the channel 23. Two second sealing rings are provided between the bottom sleeve 2 and the side wall of the manual valve chamber 12, and the two sealing rings are respectively located on both sides of the annular groove 21. The second sealing ring in this embodiment adopts an O-ring.

[0042] A sealing structure for sealing the right part of the channel 23 is provided in the manual valve chamber 12. Specifically, the sealing structure in this embodiment includes a first sealing ring 32, a sealing slider 4 and an elastic element 5. The first sealing ring 32 is an O-ring. The first sealing ring 32 is provided between the adjusting rod 3 and the bottom sleeve 2, and is located on the right side of the annular groove 21. The first sealing ring 32 is sleeved on the adjusting rod 3 and can slide to the right with the adjusting rod 3.

[0043] The sealing slider 4 is slidably matched with the adjusting rod 3. The right end of the channel 23 is trumpet-shaped and opposite to the sealing slider 4. The diameter of the left end of the channel 23 is smaller than the outer diameter of the sealing slider 4. The left end of the sealing slider 4 abuts against the bottom sleeve 2 and seals the right end of the channel 23. The elastic element 5 is a spring. The left end of the spring is connected to the sealing slider 4, and the right end is connected to the top limiting sleeve 7, which is used to keep the sealing slider 4 abutting against the bottom sleeve 2. A limiting ring 6 is also sleeved on the outside of the elastic element 5. The left end of the limiting ring 6 extends to the outside of the sealing slider 4 and abuts against the right end of the bottom sleeve 2. The left end of the limiting ring 6 abuts against the top limiting sleeve 7. In this embodiment, a plurality of vents 61 are provided on the limiting ring 6 to connect the TPRD flow channel 14 and the TPRD cavity 15.

[0044] A transition nut 8 is provided on the right side of the top limiting sleeve 7. The transition nut 8 is interference fit with the valve body 1, and the right end of the top limiting sleeve 7 is connected to the transition nut 8. At this time, the top limiting sleeve 7, the limiting ring 6 and the bottom sleeve 2 can be limited by the transition nut 8 to prevent them from axial movement.

[0045] The radial cross-section of the transition nut 8 is a polygon. Specifically, the transition nut 8 in this embodiment adopts a hexagonal nut. The radial cross-section of the right end of the adjusting rod 3 is a hexagon that matches the shape of the inner hole of the transition nut 8. The right end of the adjusting rod 3 extends into the transition nut 8. The adjusting rod 3 is limited by the transition nut 8 so that the adjusting rod 3 can only slide axially in the manual valve chamber 12. In actual implementation, the adjusting rod 3 can also be limited by providing a matching slider, slide groove, etc. between the adjusting rod 3 and the side wall of the manual valve chamber 12 to ensure that the adjusting rod 3 can only slide axially.

[0046] The left end of the threaded rod 9 is located inside the transition nut 8, and the right end of the adjusting rod 3 is provided with a thread groove 31 with an opening facing right. The left end of the threaded rod 9 is located in the thread groove 31 and is threadedly matched with the adjusting rod 3, so that after the threaded rod 9 is rotated, the adjusting rod 3 can be driven to slide axially through the matched thread. The right end of the threaded rod 9 extends to the outside of the valve body 1 and is threadedly connected with a jacket nut 91. In this embodiment, O-rings are provided for sealing between the sealing slider 4 and the adjusting rod 3, between the adjusting rod 3 and the top limiting sleeve 7, between the limiting sleeve and the side wall of the manual valve chamber 12, between the transition nut 8 and the side wall of the manual valve chamber 12, between the threaded rod 9 and the transition nut 8, and between the threaded rod 9 and the jacket nut 91. The sealing effect is good, and hydrogen will not leak to the right during the movement of the threaded rod 9 and the adjusting rod 3.

[0047] The specific implementation process is as follows:

[0048] Combination Figure 4 As shown, initially, the left end of the regulating rod 3 abuts against the connecting hole 17 to seal the gas inlet and outlet 11. When it is necessary to discharge hydrogen, the threaded rod 9 is rotated to slide the regulating rod 3 to the right, and the gas inlet and outlet 11 is connected with the gas charging path 13. The hydrogen in the hydrogen storage cylinder is discharged from the gas inlet and outlet 11 through the gas charging path 13, the gas charging path hole 22, the channel 23 and the connecting hole 17. When it is no longer necessary to discharge hydrogen, the threaded rod 9 is rotated in the opposite direction to slide the regulating rod 3 to the left to re-close the connecting hole 17.

[0049] Combination Figure 5 As shown, when it is necessary to inflate the hydrogen storage cylinder, the threaded rod 9 is rotated to slide the adjustment rod 3 to the right until the TPRD flow channel 14 is connected to the channel 23, and hydrogen is introduced from the gas inlet and outlet 11. After passing through the channel 23, the hydrogen enters the hydrogen storage cylinder from the gas charging channel 13 and the TPRD flow channel 14 at the same time, thereby increasing the inflation speed. During the inflation process, the O-ring located on the right side of the bottom sleeve 2 still plays a sealing role, so the hydrogen entering will not leak to the right.

[0050] After the inflation is completed, the threaded rod 9 is rotated in the opposite direction again, the adjustment rod 3 is slid to the left, and the connecting hole 17 is resealed to seal the gas inlet and outlet 11. During this movement, due to the setting of the vent hole 61 on the limit ring 6, the hydrogen storage cylinder is always connected with the TPRD cavity 15 through the TPRD flow channel 14. When the internal pressure of the hydrogen storage cylinder is too high or the temperature is too high, the fusible alloy melts or the glass bubble breaks, and the hydrogen in the hydrogen storage cylinder can be discharged from the TPRD outlet 16, so as to avoid the explosion of the hydrogen storage cylinder and improve the safety of use.

[0051] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve, comprising a valve body and an adjusting rod, characterized in that: The valve body is provided with an air inlet and outlet, a manual valve cavity, an air charging path flow channel, a TPRD flow channel and a TPRD cavity, the TPRD flow channel and the TPRD cavity are communicated, the regulating rod is located in the manual valve cavity and slides with the valve body in the axial direction, the regulating rod abuts against the air inlet and outlet and seals the air inlet and outlet; a bottom sleeve and a threaded rod are provided in the manual valve cavity, the bottom sleeve is sleeved on the regulating rod and slides with the regulating rod in the axial direction, a channel that can be communicated with the air inlet and outlet is formed between the bottom sleeve and the regulating rod, and the channel is communicated with the air charging path flow channel at the same time; a sealing structure for sealing the right part of the channel is provided in the manual valve cavity, the sealing structure is located on the side of the air charging path flow channel away from the air inlet and outlet, and the sealing structure can move to the side away from the air inlet and outlet with the regulating rod; The threaded rod can rotate relative to the valve body, the threaded rod is threadably matched with the adjusting rod, and the elastic element is located between the threaded rod and the sealing slider and is used to push the sealing slider toward a side close to the bottom sleeve.

2. The vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 1 is characterized in that: A connecting hole is provided between the air inlet and outlet and the manual valve cavity. The diameter of the connecting hole is smaller than the diameter of the air inlet and outlet, and the air inlet and outlet are connected to the manual valve cavity through the connecting hole. The end of the adjusting rod abuts against the connecting hole and seals the connecting hole.

3. The vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 2 is characterized in that: One end of the regulating rod close to the air inlet and outlet is an arc-shaped surface.

4. The vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 1 is characterized in that: The sealing structure comprises a first sealing ring, and the first sealing ring is sleeved on the adjusting rod.

5. The vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 4 is characterized in that: A second sealing ring is arranged between the bottom sleeve and the manual valve chamber.

6. The vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 1, characterized in that: The sealing structure includes a sealing slider and an elastic element. The sealing slider is sleeved on the adjusting rod and abuts and seals against one end of the bottom sleeve away from the air inlet and outlet. The elastic element abuts against the bottom sleeve and is used to push the bottom sleeve toward the side close to the air inlet and outlet.

7. The vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 6, characterized in that: A limiting ring is sleeved on the outer side of the elastic element, and one end of the limiting ring close to the air inlet and outlet extends to a position opposite to the sealing slider and abuts against the bottom sleeve; a plurality of ventilation holes are arranged on the limiting ring.

8. The vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 7, characterized in that: A transition nut for limiting the limiting ring is provided on one side of the limiting ring away from the air inlet and outlet, and one end of the adjusting rod away from the air inlet and outlet extends into the transition nut and slidably cooperates with the transition nut.

9. The vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 8, characterized in that: A top limiting sleeve is arranged between the transition nut and the limiting ring. The top limiting sleeve is sleeved on the adjusting rod and two ends of the top limiting sleeve are respectively against the limiting ring and the transition nut.

10. A vehicle high-pressure hydrogen storage cylinder combination valve with an integrated manual valve according to claim 2 or 3, characterized in that: The adjusting rod is coaxial with the air inlet and outlet, and one end of the adjusting rod facing the air inlet and outlet is a hard surface.

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