Valve structure and hydrogen storage system

Abstract

The utility model provides a valve structure and a hydrogen storage system. The valve structure comprises a valve seat, a filter screen, a plugging piece and a first elastic piece, the valve seat is provided with a valve cavity, an inflow channel and an outflow channel, the inflow channel and the outflow channel are communicated with the valve cavity, and the filter screen is arranged in the valve cavity in a sliding mode and divides the valve cavity into a first branch cavity capable of being communicated with the inflow channel and a second branch cavity capable of being communicated with the outflow channel. The blocking piece is arranged at one end, close to the inflow channel, of the filter screen, the blocking piece is provided with a blocking position capable of cutting off communication of the first branch cavity and the inflow channel under pushing of the first elastic piece, and the blocking piece moves and is provided with a communication position for communicating the first branch cavity and the inflow channel under pushing of fluid entering the inflow channel. According to the valve structure, fluid can be filtered while the one-way conduction function is achieved, and therefore the cleanliness and the using performance of the fluid can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a valve structure and also to a hydrogen storage system provided with the valve structure. Background Art

[0002] A one-way valve, also known as a check valve or non-return valve, is a valve that allows fluid to flow in only one direction. Its working principle is: when fluid flows in from a specified inlet, the one-way valve will open to allow the fluid to pass; and when the fluid tries to flow back from the outlet, the one-way valve will close to prevent the fluid from flowing in the opposite direction.

[0003] Check valves are widely used in various industrial fields, such as hydraulic systems, pneumatic systems, air conditioning systems, automobile fuel systems, water pipe networks, and sewage treatment systems. In these systems, check valves play an important role in preventing fluid backflow, protecting equipment, and improving system efficiency.

[0004] In addition, as an important component of the hydrogen storage system, the one-way valve is installed in the high-pressure pipeline, the medium-pressure pipeline, the bottle valve and the hydrogen filling port to prevent hydrogen backflow and leakage, thus protecting the hydrogen storage system and even the entire vehicle. However, the traditional one-way valve has a single function and cannot meet the requirements for the cleanliness of hydrogen. Utility Model Content

[0005] In view of this, the utility model aims to provide a valve structure to facilitate the one-way flow of fluid and filter the fluid, thereby facilitating improving the cleanliness of the fluid.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A valve structure, comprising a valve seat, a filter screen, a blocking member and a first elastic member; the valve seat has a valve cavity, and an inflow channel and an outflow channel communicated with the valve cavity; the filter screen is slidably arranged in the valve cavity, and the filter screen divides the valve cavity into a first sub-cavity that can communicate with the inflow channel, and a second sub-cavity that can communicate with the outflow channel;

[0008] The blocking member is arranged at one end of the filter screen close to the inflow channel, and the first elastic member is arranged in the second sub-chamber. Under the push of the first elastic member, the blocking member has a blocking position capable of cutting off the connection between the first sub-chamber and the inflow channel. Under the push of the fluid entering the inflow channel, the blocking member moves and has a conducting position for connecting the first sub-chamber and the inflow channel.

[0009] Furthermore, the filter screen has a receiving groove with a notch facing the outflow channel, and a radially outward protrusion is provided on the outer wall of the filter screen; the sealing member is arranged at the bottom of the receiving groove, and part of the first elastic member is arranged in the receiving groove, and the protrusion is annular and abuts against the cavity wall of the valve cavity.

[0010] Furthermore, the blocking member includes an insertion part and a blocking part protruding radially outward along the insertion part; the insertion part is inserted in the filter screen, and the blocking part is provided with a guide surface, and the guide surface is used to guide the blocking part to be inserted into the inflow channel to cut off the connection between the inflow channel and the first sub-chamber.

[0011] Further, the valve seat has a blocking portion provided at a location where the outflow channel and the second sub-chamber are connected, and the blocking portion has a communication channel for connecting the second sub-chamber and the outflow channel;

[0012] Two ends of the first elastic member are respectively in contact with the blocking portion and the filter screen.

[0013] Furthermore, it also includes a valve core and a second elastic member slidably disposed in the outflow channel, and two ends of the second elastic member are respectively in contact with the valve core and the inner wall of the outflow channel;

[0014] The valve core divides the outflow channel into a first cavity that can communicate with the communication channel and a second cavity that communicates with the outlet of the outflow channel, and a communication hole that communicates the first cavity and the second cavity is provided on the valve core;

[0015] Under the push of the second elastic member, the valve core has a blocking position capable of cutting off the connection between the connecting passage and the first cavity. Under the push of the fluid entering the connecting passage, the valve core moves to have a connecting position capable of connecting the first cavity and the connecting passage.

[0016] Furthermore, a flow channel communicating with the outlet is provided in the valve core, and a plurality of communication holes are arranged at intervals along the circumference of the flow channel.

[0017] Furthermore, the second elastic member is a spring sleeved outside the valve core, and the valve core is provided with an annular portion protruding radially outward; the annular portion abuts against the inner wall of the outflow channel, and the two ends of the spring abut against the inner wall of the outflow channel and the annular portion respectively.

[0018] Furthermore, the valve seat includes a first seat body, and a second seat body with one end inserted into the first seat body;

[0019] The outflow channel is arranged on the first seat body, the inflow channel is arranged on the second seat body, and the valve cavity is formed by the first seat body and the second seat body.

[0020] Furthermore, one end of the second seat body inserted into the first seat body is threadedly connected to the first seat body, and a nut is threadedly connected to the second seat body, and the nut abuts against the end surface of the first seat body.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] The valve structure described in the utility model is provided with a filter screen in the valve cavity of the valve seat, and the filter screen divides the valve cavity into a first sub-cavity connected with the inflow channel and a second sub-cavity connected with the outflow channel, and the blocking member is provided on the filter screen, and can have a blocking position for cutting off the connection between the first sub-cavity and the inflow channel under the push of the first elastic member, and under the push of the fluid entering the inflow channel, the blocking member moves and has a conducting position for connecting the first sub-cavity and the inflow channel, thereby allowing the fluid to flow into the first sub-cavity first, and then flow into the second sub-cavity and the outflow channel after flowing through the filter screen. While having a unidirectional conduction function, the valve structure can also filter impurities in the fluid, thereby helping to improve the cleanliness and performance of the fluid.

[0023] In addition, another object of the present invention is to provide a hydrogen storage system, comprising the valve structure as described above.

[0024] The hydrogen storage system of the utility model is beneficial to improving the circulation effect and cleanliness of hydrogen by providing the above valve structure, thereby improving the performance of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the internal structure of the valve structure described in an embodiment of the utility model;

[0027] Figure 2 This is a schematic structural diagram of the first seat body according to an embodiment of the utility model;

[0028] Figure 3 This is a schematic structural diagram of the second seat body according to an embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the filter screen and the blocking member according to an embodiment of the utility model;

[0030] Figure 5 It is a structural schematic diagram of the valve core described in an embodiment of the utility model.

[0031] Description of reference numerals:

[0032] 1. First seat body; 2. Second seat body; 3. Filter screen; 4. Blocking member; 5. Blocking part; 6. First elastic member; 7. Second elastic member; 8. Valve core;

[0033] 100, valve seat; 101, right installation chamber; 102, outflow channel; 103, outlet; 104, first sub-chamber; 105, second sub-chamber; 106, first sealing ring; 107, first cavity; 108, second cavity; 109, annular groove;

[0034] 201, inflow channel; 202, left installation cavity; 203, upper connecting port; 204, back-tightening nut; 205, standard nut;

[0035] 301, protrusion; 302, second sealing ring; 303, receiving groove;

[0036] 401, plug-in portion; 402, plugging portion; 403, guide surface;

[0037] 501, communication channel; 502, left communication port;

[0038] 801, annular portion; 802, circulation channel; 803, connecting hole. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0043] This embodiment relates to a valve structure, the overall structure of which is as follows: Figure 1 As shown in the figure, the valve seat 100 includes a valve seat 100, a filter screen 3, a blocking member 4 and a first elastic member 6. The valve seat 100 has a valve cavity, and an inflow channel 201 and an outflow channel 102 communicated with the valve cavity. The filter screen 3 is slidably arranged in the valve cavity, and the filter screen 3 divides the valve cavity into a first sub-chamber 104 that can communicate with the inflow channel 201, and a second sub-chamber 105 that can communicate with the outflow channel 102.

[0044] The blocking member 4 is disposed at one end of the filter screen 3 close to the inflow channel 201, and the first elastic member 6 is disposed in the second sub-chamber 105, and the two ends thereof are respectively in contact with the valve seat 100 and the filter screen 3. Under the push of the first elastic member 6, the blocking member 4 has a blocking position capable of cutting off the connection between the first sub-chamber 104 and the inflow channel 201. Under the push of the fluid entering the inflow channel 201, the blocking member 4 moves and has a conducting position connecting the first sub-chamber 104 and the inflow channel 201.

[0045] The valve structure described in this embodiment is provided with a filter screen 3 in the valve cavity of the valve seat 100. The filter screen 3 divides the valve cavity into a first sub-cavity 104 connected to the inflow channel 201 and a second sub-cavity 105 connected to the outflow channel 102. The blocking member 4 is provided on the filter screen 3. Under the push of the first elastic member 6, the blocking member 4 has a blocking position that cuts off the connection between the first sub-cavity 104 and the inflow channel 201. Under the push of the fluid entering the inflow channel 201, the blocking member 4 moves toward the direction close to the second sub-cavity 105 and has a conducting position that conducts the first sub-cavity 104 and the inflow channel 201. When the blocking member 4 is in the conducting position, the fluid can first flow into the first sub-cavity 104, and then flow into the second sub-cavity 105 and the outflow channel 102 after flowing through the filter screen 3. While having a unidirectional conduction function, the valve structure can also filter impurities in the fluid, thereby improving the cleanliness and performance of the fluid.

[0046] It should be noted that the valve structure in this embodiment can be arranged on the pipeline or on the valve body. When the valve structure is arranged on the pipeline, the fluid flowing in the pipeline can only flow in one direction and filter the fluid. When the valve structure is arranged on the channel of the valve body, the fluid flowing through the channel can also flow in one direction and filter the fluid. The fluid in this embodiment can be a liquid (such as water, coolant, etc.) or a gas (such as hydrogen, air, nitrogen, etc.). In specific implementation, the fluid can be determined according to the use requirements.

[0047] As a preferred embodiment, Figures 1 to 3 As shown in the figure, the valve seat 100 includes a first seat body 1 and a second seat body 2 with one end inserted in the first seat body 1. The outflow channel 102 is provided on the first seat body 1, the inflow channel 201 is provided on the second seat body 2, and the valve cavity is formed by the first seat body 1 and the second seat body 2. The cooperation between the first seat body 1 and the second seat body 2 not only facilitates the arrangement and implementation of the valve seat 100, but also facilitates the arrangement of the filter screen 3, the blocking member 4 and the first elastic member 6.

[0048] In terms of specific structure, Figure 1 The first seat body 1 and the second seat body 2 are arranged on the left and right, and the second seat body 2 is connected to the right side of the first seat body 1. Figure 2 As shown in the figure, the right end of the first seat body 1 is provided with a right installation cavity 101 opened toward the second seat body 2, and the outflow channel 102 is provided at the left end of the first seat body 1, and extends along the length direction of the first valve seat 100, and is connected to the right installation cavity 101. The cross-sectional area of ​​the right installation cavity 101 is larger than the cross-sectional area of ​​the outflow channel 102, and a lower communication port is formed at the connection between the two.

[0049] like Figure 3 As shown in the figure, the left end of the second seat body 2 is provided with a left installation cavity 202 opened downwardly to the first seat body 1, and the inflow channel 201 is provided at the right end of the second seat body 2 and extends along the length direction of the second seat body 2 and communicates with the left installation cavity 202. The left end of the second seat body 2 can be installed in the right installation cavity 101, and the above-mentioned valve cavity is defined between the left installation cavity 202 and the right installation cavity 101. The cross-sectional area of ​​the left installation cavity 202 is larger than the cross-sectional area of ​​the inflow channel 201, and a lower communication port is formed at the connection between the two.

[0050] As a preferred connection method, the second seat body 2 is inserted into one end of the first seat body 1 and is screwed to the first seat body 1, and a nut is screwed on the second seat body 2, and the nut abuts against the end face of the first seat body 1. As a feasible implementation method, an external thread is provided on the outer peripheral wall of the left end of the second seat body 2, and an internal thread is provided on the inner peripheral wall of the right installation cavity 101. The second seat body 2 can be connected to the first seat body 1 by screwing the internal thread and the external thread. Here, the second seat body 2 and the first seat body 1 are screwed together, which is conducive to the convenience of the first seat body 1 and the second seat body 2 during the connection operation, and is also convenient for the installation and removal of various components in the valve cavity. In order to improve the sealing effect of the valve cavity, a first sealing ring 106 is also provided between the left end of the second seat body 2 and the inner wall of the right installation cavity 101.

[0051] The nut in this embodiment is screwed to the middle of the second seat body 2. Specifically, the nut includes a standard nut 205 and a back-tightening nut 204, wherein the back-tightening nut 204 is located outside the standard nut 205, and the standard nut 205 abuts against the right end surface of the first seat body 1. The back-tightening nut 204 can be a product in the prior art, which is a special fastener, usually used together with the standard nut 205 to prevent the loosening of the connection between the second seat body 2 and the first seat body 1 due to vibration or other reasons. The back-tightening nut 204 forms a pressure at the standard nut 205 to complete the tightening of the standard nut 205, thereby ensuring the firmness of the connection of the second seat body 2 to the first seat body 1, and further facilitating the use stability of the valve structure.

[0052] As a preferred embodiment, Figure 1 and Figure 4 As shown in the figure, the filter screen 3 has a receiving groove 303 with a notch facing the outflow channel 102, and a radially outwardly protruding protrusion 301 is provided on the outer wall of the filter screen 3. The blocking member 4 is arranged at the bottom of the receiving groove 303, and part of the first elastic member 6 is arranged in the receiving groove 303. The protrusion 301 is annular and abuts against the cavity wall of the valve cavity. Due to the arrangement of the receiving groove 303, the filter screen 3 is cup-shaped, and the filter holes of the filter screen 3 are at least arranged on the outer periphery of the filter screen 3. The cup-shaped filter screen 3 here can utilize the high strength of the cup-shaped structure to improve the structural strength and use stability of the filter screen 3.

[0053] In this embodiment, the protrusions 301 are two notches corresponding to the receiving grooves 303 and are arranged on the outer periphery of the filter screen 3. The two protrusions 301 are arranged at intervals along the axial direction of the receiving groove. The filter screen 3 is specifically slidably arranged in the valve cavity through the two protrusions 301. Due to the arrangement of the protrusions 301, the above-mentioned first sub-cavity 104 is formed between the outer peripheral wall of the filter screen 3 and the inner peripheral wall of the valve cavity. The fluid flowing into the first sub-cavity 104 flows through the filter screen 3 and then flows into the second sub-cavity 105, thereby ensuring the filtering effect of the filter screen 3 on the fluid.

[0054] In this embodiment, the abutment between the two protrusions 301 and the inner wall of the receiving groove 303 facilitates the filter 3 to separate the valve chamber into a first sub-chamber 104 located upstream and a second sub-chamber 105 located downstream. At the same time, the protrusion 301 can also improve the stability of the filter 3 during sliding.

[0055] like Figure 4 As shown in FIG. 1 , an annular groove is formed between the two protrusions 301 in this embodiment. To further ensure that the airflow into the first sub-chamber 104 can flow into the second sub-chamber 105 only after flowing through the filter screen 3. Figure 1 As shown in the figure, a second sealing ring 302 is provided on one of the protrusions 301, and the second sealing ring 302 abuts between the outer peripheral wall of the filter screen 3 and the inner peripheral wall of the right installation cavity 101, thereby facilitating the separation effect of the filter screen 3, and further facilitating improving the filtering effect of the filter screen 3 on the fluid. It should be noted that the number and position of the protrusions 301 in this embodiment can still be determined according to the use requirements. In addition, in addition to being cup-shaped, the filter screen 3 can also be in other shapes as long as it meets the use requirements.

[0056] Still refer to Figure 1 and Figure 4 As shown in the figure, the blocking member 4 in this embodiment includes an inserting portion 401 and a blocking portion 402 protruding radially outward from the inserting portion 401. The inserting portion 401 is inserted into the filter screen 3, and a guide surface 403 is provided on the blocking portion 402. The guide surface 403 is used to guide the blocking portion 402 to be inserted into the inflow channel 201 to cut off the communication between the inflow channel 201 and the first sub-chamber 104. The blocking portion 402 of the blocking member 4 is specifically used to block the upper communication port 203 mentioned above.

[0057] Among them, in this embodiment, the plugging is provided with an inserting part 401, which is conducive to improving the installation effect of the plugging member 4 on the filter screen 3, and by providing a guide surface 403 on the plugging part 402, the upper communication port 203 can be in surface contact with the guide surface 403, which is conducive to improving the plugging effect of the plugging part 402 on the upper communication port 203. When the plugging part 402 blocks the upper communication port 203, the fluid in the inflow channel 201 cannot flow into the valve cavity. When the plugging part 402 contacts the plugging of the upper communication port 203, the fluid can flow into the valve cavity through the inflow channel 201, and after flowing through the filter screen 3, it flows into the outflow channel 102, and the fluid can only flow in one direction and cannot flow back.

[0058] Reference Figure 1 and Figure 2As shown in FIG. 1 , the valve seat 100 in this embodiment has a blocking portion 5 provided at the connection between the outflow channel 102 and the second sub-chamber 105, and the blocking portion 5 has a connecting channel 501 for connecting the second sub-chamber 105 and the outflow channel 102. The two ends of the first elastic member 6 are respectively in contact with the blocking portion 5 and the filter screen 3. The provision of the blocking portion 5 here is not only conducive to the arrangement and installation of the first elastic member 6, but also conducive to the flow of fluid into the outflow channel 102.

[0059] The blocking portion 5 is specifically arranged at the lower connecting port, and the outer contour of the cross-section of the blocking portion 5 can be: Figure 1 As shown in the "T" shape, the inner circumferential wall of the right mounting cavity 101 for mounting the blocking part 5 is arranged in the shape of the blocking part 5, and the blocking part 5 is interference fitted in the right mounting cavity 101, which is beneficial to improve the connection effect and sealing between the blocking part 5 and the right mounting cavity 101, thereby ensuring that the fluid in the second sub-cavity 105 can only flow into the outflow channel 102 through the connecting channel 501.

[0060] Furthermore, in the connected state, the working end face of the second seat body 2 abuts against the right end face of the blocking part 5. The setting of the abutting relationship here is also conducive to ensuring the installation firmness of the second seat body 2 on the first seat body 1. The first elastic member 6 in this embodiment is specifically a spring, which has a simple structure and is easy to arrange and implement. In the initial state, the blocking member 4 blocks the upper connecting port 203, and a gap is formed between the left end of the filter screen 3 and the right end face of the blocking part 5. In order to ensure the arrangement effect of the first elastic member 6, the cross-sectional area of ​​the fluid channel is smaller than the cross-sectional area of ​​the spring.

[0061] As a preferred embodiment, Figure 1 As shown in FIG. 1 , the valve structure in this embodiment further includes a valve core 8 and a second elastic member 7 slidably disposed in the outflow channel 102. Both ends of the second elastic member 7 abut against the valve core 8 and the inner wall of the outflow channel 102, respectively.

[0062] The valve core 8 divides the outflow channel 102 into a first cavity 107 that can communicate with the communicating channel 501 and a second cavity 108 that communicates with the outlet 103 of the outflow channel 102 , and a communicating hole 803 that connects the first cavity 107 and the second cavity 108 is provided on the valve core 8 .

[0063] Under the push of the second elastic member 7, the valve core 8 has a blocking position capable of cutting off the connection between the connecting channel 501 and the first cavity 107. Under the push of the fluid entering the connecting channel 501, the valve core 8 moves and has a conducting position capable of connecting the first cavity 107 and the connecting channel 501.

[0064] In this embodiment, a valve core 8 and a second elastic member 7 are arranged on the outflow channel 102, so as to cooperate with the blocking member 4 to form a double blocking cooperation. When the blocking member 4 fails and cannot block the upper connecting port 203, the valve core 8 can ensure the unidirectional conduction effect of the valve structure, thereby preventing the fluid from flowing back.

[0065] Still refer to Figure 1 and Figure 5 As shown in the figure, the valve core 8 is specifically used to block the left communication port 502 of the communication channel 501 on the blocking part 5. The second elastic member 7 is a spring sleeved outside the valve core 8, and an annular portion 801 protruding outward along its own radial direction is provided on the valve core 8. The annular portion 801 abuts against the inner wall of the outflow channel 102, and the two ends of the spring abut against the inner wall of the outflow channel 102 and the annular portion 801 respectively.

[0066] In terms of specific structure, still refer to Figure 1 and Figure 5 As shown in FIG. 1 , an annular groove 109 is provided on the inner peripheral wall of the outflow channel 102 relative to the annular portion 801, wherein the left side of the annular groove 109 is used to abut against the bottom end of the second elastic member 7 to form an abutting portion. The right end of the second elastic member 7 is sleeved outside the valve core 8 and abuts against the annular portion 801, and the left end of the second elastic member 7 abuts against the left side wall of the annular groove 109.

[0067] The arrangement of the second elastic member 7 in this embodiment is conducive to ensuring the sliding stability of the valve core 8. In addition, the provision of the annular portion 801 is not only conducive to the arrangement of the second elastic member 7, but also conducive to further improving the sliding stability of the valve core 8.

[0068] like Figure 5 As shown in , the valve core 8 of this embodiment is provided with a circulation channel 802 connected with the outlet 103, and the communication holes 803 are arranged at intervals along the circumference of the circulation channel 802. The opening of the circulation channel 802 is arranged toward the outlet 103, and the multiple communication holes 803 are arranged at one end of the valve core 8 facing the blocking part 5. In addition, the above-mentioned first cavity 107 is also formed between the outer periphery of the right end of the valve core 8 and the outer peripheral wall of the outflow channel 102. When the valve core 8 releases the blockage of the left communication port 502, the fluid in the communication channel 501 can first flow into the first cavity 107, and then flow into the circulation channel 802 and the second cavity 108 through the multiple communication holes 803 and flow out through the outlet 103. The arrangement of the circulation channel 802 and the multiple communication holes 803 is conducive to ensuring the outflow effect of the fluid.

[0069] In order to further improve the sealing effect of the valve core 8 on the left communication port 502, an arcuate surface is formed at the right end of the valve core 8 in this embodiment, and the left communication port 502 is sealed by the arcuate surface. The arcuate surface has a simple structure, is easy to be processed and formed on the valve core 8, and has a good sealing effect on the left communication port 502.

[0070] When the valve structure shown in this embodiment is in use, when the leftward force of the flow in the inflow channel 201 acting on the blocking member 4 is greater than the rightward force of the first elastic member 6 acting on the blocking member 4, the blocking member 4 slides to the left and squeezes the first elastic member 6, so that the blocking member 4 moves from the blocking position to the conducting position, so that the blocking member 4 contacts the upper communication port 203. At this time, the fluid flows into the first sub-chamber 104 between the outer peripheral wall of the filter screen 3 and the inner peripheral wall of the valve chamber, and flows into the second sub-chamber 105 after flowing through the outer peripheral wall of the filter screen 3, and then flows into the communication channel 501.

[0071] The fluid continues to flow backward, and when the force exerted to the left on the valve core 8 by the fluid is greater than the force exerted to the right on the valve core 8 by the second elastic member 7, the valve core 8 slides to the left and squeezes the second elastic member 7 until the valve core 8 releases the blockage of the left connecting port 502, that is, the valve core 8 moves from the blocking position to the conducting position. At this time, the fluid in the connecting channel 501 flows into the first cavity 107, and flows into the second cavity 108 through multiple connecting holes 803, and then flows out through the outlet 103.

[0072] The blocking member 4 can be reset under the action of the first elastic member 6, and the valve core 8 can be reset under the action of the second elastic member 7. In addition, when the force applied by the fluid to the blocking member 4 is insufficient to make the blocking member 4 slide, the blocking member 4 keeps blocking the upper communication port 203, and no fluid flows through the valve structure at this time.

[0073] The valve structure in this embodiment, by arranging the filter screen 3 in the valve cavity and integrating the blocking member 4 and the filter screen 3 together, enables the filter screen 3 to filter the fluid only when the blocking member 4 contacts and blocks the upper communication port 203, which is beneficial to prolonging the service life of the filter screen 3. Furthermore, the valve core 8 and the blocking member 4 can both move and cooperate between the blocking position and the conducting position, which is beneficial to further ensure the one-way on-off performance of the valve structure, thereby effectively preventing the occurrence of fluid backflow problems.

[0074] In addition, this embodiment also relates to a hydrogen storage system, which includes the above valve structure.

[0075] The hydrogen storage system described in this embodiment is beneficial to improving the circulation effect and cleanliness of hydrogen by providing the above valve structure on the pipeline, thereby improving the performance of the energy storage system.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve structure, characterized in that: It comprises a valve seat (100), a filter screen (3), a blocking member (4) and a first elastic member (6); The valve seat (100) has a valve cavity, and an inflow channel (201) and an outflow channel (102) communicated with the valve cavity; the filter screen (3) is slidably disposed in the valve cavity, and the filter screen (3) divides the valve cavity into a first sub-chamber (104) that can communicate with the inflow channel (201), and a second sub-chamber (105) that can communicate with the outflow channel (102); The blocking member (4) is arranged at one end of the filter screen (3) close to the inflow channel (201); the first elastic member (6) is arranged in the second sub-chamber (105); under the push of the first elastic member (6), the blocking member (4) has a blocking position capable of cutting off the connection between the first sub-chamber (104) and the inflow channel (201); under the push of the fluid entering the inflow channel (201), the blocking member (4) moves and has a conducting position for conducting the first sub-chamber (104) and the inflow channel (201).

2. The valve structure according to claim 1, characterized in that: The filter screen (3) has a receiving groove (303) with a notch facing the outflow channel (102), and a radially outwardly protruding protrusion (301) is provided on the outer wall of the filter screen (3); The blocking member (4) is arranged at the bottom of the accommodating groove (303), part of the first elastic member (6) is arranged in the accommodating groove (303), and the protrusion (301) is annular and abuts against the cavity wall of the valve cavity.

3. The valve structure according to claim 1, characterized in that: The blocking member (4) comprises an inserting portion (401) and a blocking portion (402) protruding radially outwardly from the inserting portion (401); The insertion part (401) is inserted into the filter screen (3), and the blocking part (402) is provided with a guide surface (403), and the guide surface (403) is used to guide the blocking part (402) to be inserted into the inflow channel (201) so as to cut off the connection between the inflow channel (201) and the first sub-chamber (104).

4. The valve structure according to claim 1, characterized in that: The valve seat (100) has a blocking portion (5) provided at a location where the outflow channel (102) and the second sub-chamber (105) are connected, and the blocking portion (5) has a communication channel (501) for connecting the second sub-chamber (105) and the outflow channel (102); Both ends of the first elastic member (6) are in contact with the blocking portion (5) and the filter screen (3) respectively.

5. The valve structure according to claim 4, characterized in that: It also comprises a valve core (8) and a second elastic member (7) slidably arranged in the outflow channel (102), wherein two ends of the second elastic member (7) are respectively in contact with the valve core (8) and the inner wall of the outflow channel (102); The valve core (8) divides the outflow channel (102) into a first cavity (107) capable of communicating with the communication channel (501), and a second cavity (108) communicating with the outlet (103) of the outflow channel (102), and a communication hole (803) communicating with the first cavity (107) and the second cavity (108) is provided on the valve core (8); Under the push of the second elastic member (7), the valve core (8) has a blocking position capable of cutting off the connection between the connecting passage (501) and the first cavity (107); under the push of the fluid entering the connecting passage (501), the valve core (8) moves to have a conducting position capable of conducting the first cavity (107) and the connecting passage (501).

6. The valve structure according to claim 5, characterized in that: The valve core (8) is provided with a circulation channel (802) communicating with the outlet (103), and a plurality of communication holes (803) are arranged at intervals along the circumference of the circulation channel (802).

7. The valve structure according to claim 5, characterized in that: The second elastic member (7) is a spring sleeved outside the valve core (8), and the valve core (8) is provided with an annular portion (801) protruding outward in its radial direction; The annular portion (801) abuts against the inner wall of the outflow channel (102), and the two ends of the spring abut against the inner wall of the outflow channel (102) and the annular portion (801) respectively.

8. The valve structure according to any one of claims 1 to 7, characterized in that: The valve seat (100) comprises a first seat body (1), and a second seat body (2) one end of which is inserted into the first seat body (1); The outflow channel (102) is arranged on the first seat body (1), the inflow channel (201) is arranged on the second seat body (2), and the valve cavity is formed by the first seat body (1) and the second seat body (2).

9. The valve structure according to claim 8, characterized in that: One end of the second seat body (2) inserted into the first seat body (1) is threadedly connected to the first seat body (1), and a nut is threadedly connected to the second seat body (2), and the nut abuts against the end surface of the first seat body (1).

10. A hydrogen storage system, characterized in that: A valve structure comprising any one of claims 1 to 9.

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