A hydrogen pressure reducing valve and a hydrogen pressure reducing device

Abstract

The present application relates to a hydrogen pressure reducing valve and a hydrogen pressure reducing device, and belongs to the technical field of pressure reducing valves. It includes a first valve body, a second valve body and a blocking mechanism, the first valve body is used to reduce the pressure of hydrogen, the first valve body includes a first air inlet end, a first air outlet end and a second air outlet end, the first air inlet end is connected to the first air outlet end and the second air outlet end; the second valve body is used to reduce the pressure of hydrogen, the second valve body includes a second air inlet end and a third air outlet end, the second air inlet end is connected to the second air outlet end, and the first air outlet end and the third air outlet end are both connected to the atmosphere; the blocking mechanism is provided with a first end and a second end, the first end and the second end of the blocking mechanism are respectively movably arranged in the first air outlet end and the second air outlet end, and the blocking mechanism is used to selectively block the first air outlet end or the second air outlet end. The present application has the effect of improving the adjustability of the pressure reducing capacity of the hydrogen pressure reducing valve.

Description

Technical Field

[0001] The present application relates to the technical field of pressure reducing valves, and in particular to a hydrogen pressure reducing valve and a hydrogen pressure reducing device. Background Art

[0002] During the hydrogen transportation process, due to the flammable and explosive properties of hydrogen, strict pressure reduction control is required to ensure transportation safety.

[0003] At present, pressure reducing valves are usually used to reduce the pressure of hydrogen. A pressure reducing valve is a structure that reduces the gas pressure and stabilizes it to a certain value. It adjusts the gas flow rate by controlling the opening of the opening and closing parts in the valve body, reduces the gas pressure, and adjusts the opening of the opening and closing parts with the help of the pressure behind the valve to keep the pressure behind the valve within a certain range.

[0004] However, the pressure reducing valves in the related structures use one-stage pressure reduction, which has limited pressure reducing effect; the other uses two-stage pressure reduction, which can improve the pressure reducing capacity, but when the pressure reducing requirement is low, the two-stage pressure reducing will cause waste of production capacity. The implementation of the one-stage pressure reducing and the two-stage pressure reducing cannot be adjusted according to the hydrogen pressure and pressure reducing requirements, and the applicability is poor.

[0005] With regard to the above-mentioned related technologies, there is a defect that the pressure reducing capacity of the hydrogen pressure reducing valve is not sufficiently adjustable. Summary of the invention

[0006] In order to improve the adjustability of the pressure reducing capability of a hydrogen pressure reducing valve, the present application provides a hydrogen pressure reducing valve and a hydrogen pressure reducing device.

[0007] In the first aspect, the hydrogen pressure reducing valve provided by the present application adopts the following technical solution:

[0008] A hydrogen pressure reducing valve comprises: a first valve body for reducing the pressure of hydrogen, the first valve body comprising a first air inlet end, a first air outlet end and a second air outlet end, the first air inlet end being connected to the first air outlet end and the second air outlet end; a second valve body for reducing the pressure of hydrogen, the second valve body comprising a second air inlet end and a third air outlet end, the second air inlet end being connected to the second air outlet end, the first air outlet end and the third air outlet end being both connected to the atmosphere; a blocking mechanism, the blocking mechanism being provided with a first end and a second end, the first end and the second end of the blocking mechanism being movably arranged in the first air outlet end and the second air outlet end, respectively, the blocking mechanism being used to selectively block the first air outlet end or the second air outlet end.

[0009] By adopting the above technical scheme, the first valve body and the second valve body are both used to achieve hydrogen decompression, and the blocking mechanism is used to selectively connect the first valve body and the second valve body, so that when the hydrogen pressure is relatively small and the decompression requirement is relatively low, the second gas outlet end can be disconnected by the second end of the blocking mechanism, so that hydrogen can enter the first valve body through the first gas inlet end and be discharged from the first gas outlet end, thereby achieving a first-level decompression of the hydrogen; when the hydrogen pressure is relatively large and the decompression requirement is high, the first end of the blocking mechanism disconnects the first gas outlet end, so that hydrogen enters the first valve body through the first gas inlet end, enters the second valve body from the second gas outlet end and is decompressed, and is discharged from the third gas outlet end, so that hydrogen passes through the first valve body and the second valve body in sequence, thereby achieving a second-level decompression, thereby achieving the adjustment of the decompression capacity, improving the adjustability of the decompression capacity of the hydrogen pressure reducing valve, so as to be suitable for hydrogen of different pressures and different decompression requirements, thereby improving the applicability.

[0010] Optionally, the first air outlet end is set to a first preset length, and the second air outlet end is set to a second preset length. The blocking mechanism includes a first connector, a second connector and a connecting piece. The first air outlet end is provided with a first avoidance groove, and the second air outlet end is provided with a second avoidance groove. The first connector and the second connector are respectively arranged on both sides of the connecting piece. The first connector is slidably inserted in the first avoidance groove, and the second connector is slidably inserted in the second avoidance groove. Both the first connector and the second connector have an arc.

[0011] By adopting the above technical scheme, the first air outlet end is of the first preset length, and the second air outlet end is of the second preset length, so that the first avoidance groove and the second avoidance groove have setting space; the first connector and the second connector are respectively arranged on both sides of the connecting piece, so that the blocking mechanism is a whole, so that it is convenient to make only one of the first connector and the second connector to be plugged in, that is, only one of the first air outlet end and the second air outlet end is blocked, and the hydrogen pressure reducing valve is a first-stage pressure reducing or a second-stage pressure reducing; the first connector and the second connector have an arc, on the one hand, it is convenient to realize the plug-in by reciprocating movement of the connecting piece along the same arc, and on the other hand, it can reduce the impact force of hydrogen on the first connector or the second connector, so that the hydrogen can flow along the arc after contacting the first connector or the second connector to disperse the impact force, or even reflux, thereby improving the reliability of blocking.

[0012] Optionally, the cross-sectional area of ​​the first connector is greater than or equal to the cross-sectional area of ​​the inner cavity of the first gas outlet for gas circulation, and the cross-sectional area of ​​the second connector is greater than or equal to the cross-sectional area of ​​the inner cavity of the second gas outlet for gas circulation.

[0013] By adopting the above technical solution, the first connector can reliably block the first gas outlet after being inserted into the first gas outlet, thereby preventing hydrogen from being discharged through the first gas outlet; and the second connector can reliably block the second gas outlet after being inserted into the second gas outlet, thereby preventing hydrogen from being discharged through the second gas outlet to the third gas outlet.

[0014] Optionally, a first sealing portion is provided at an end of the first connector away from the connector, and the first sealing portion is set in a first arc away from the first side of the connector, so that when the first connector is extended into the first air outlet, the first side of the first sealing portion is in contact with the first side surface of the first air outlet, and the first sealing portion is set in a second arc close to the second side of the connector, so that when the first connector is pulled out to connect the first air outlet, the second side of the first sealing portion is in contact with the second side surface of the first air outlet; a second sealing portion is provided at an end of the second connector away from the connector, and the second sealing portion is set in a third arc away from the first side of the connector, so that when the second connector is extended into the second air outlet, the first side of the second sealing portion is in contact with the third side surface of the second air outlet, and the second sealing portion is set in a fourth arc close to the second side of the connector, so that when the second connector is pulled out to connect the second air outlet, the second side of the second sealing portion is in contact with the fourth side surface of the second air outlet; a side of the connector close to the first air outlet is set in a second arc, and a side of the connector close to the second air outlet is set in a fourth arc.

[0015] By adopting the above technical scheme, the first side of the first sealing part can be fitted with the first side surface of the first air outlet end, the second side of the first sealing part can be fitted with the second side surface of the first air outlet end, the first side of the second sealing part can be fitted with the third side surface of the second air outlet end, the second side of the second sealing part can be fitted with the fourth side surface of the second air outlet end, and the two sides of the connecting part can be fitted with the first air outlet end and the second air outlet end respectively, so that the first connector and the second connector can maintain sealing when plugging, thereby ensuring the plugging effect; at the same time, when the first connector or the second connector is blocked, multiple limiting effects can be achieved through the first sealing part, the second sealing part and the connecting part, which helps to improve positioning accuracy and improve blocking reliability.

[0016] In the second aspect, the hydrogen decompression device provided by the present application adopts the following technical solution:

[0017] A hydrogen pressure reducing device comprises the above-mentioned hydrogen pressure reducing valve, and further comprises: an input mechanism, comprising a storage component and an input pipe group, the storage component is used to store hydrogen, and the storage component is detachably connected to the input pipe group; a control mechanism, one end of which is connected to the input pipe group; a pressure reducing mechanism, which is connected to the other end of the control mechanism, and the control mechanism is used to control the connection and disconnection between the input mechanism and the pressure reducing mechanism, the pressure reducing mechanism comprises a first pressure reducing pipe group and a second pressure reducing pipe group, the delivery flow of the first pressure reducing pipe group is greater than the delivery flow of the second pressure reducing pipe group, when the control mechanism conducts the input mechanism and the pressure reducing mechanism, at least one of the first pressure reducing pipe group and the second pressure reducing pipe group is connected to the input mechanism, and the first pressure reducing pipe group and the second pressure reducing pipe group are both provided with the hydrogen pressure reducing valve, so that hydrogen is input into the hydrogen pressure reducing valve from the first air inlet end and output from the hydrogen pressure reducing valve from the first air outlet end or the third air outlet end.

[0018] By adopting the above technical solution, the storage component is detachably connected to the input pipe group, so as to facilitate the replacement of the storage component, thereby continuously providing hydrogen; the control mechanism controls the on-off between the input mechanism and the pressure reducing mechanism, so as to reduce the pressure of hydrogen and output it according to the use needs; at the same time, since the first pressure reducing pipe group and the second pressure reducing pipe group of the pressure reducing mechanism have different conveying flow rates, it is easier to be applicable to hydrogen with different flow rates, thereby improving the pressure reducing accuracy; and, since the first pressure reducing pipe group and the second pressure reducing pipe group are both provided with the above hydrogen pressure reducing valve, appropriate pressure reducing capacity can be provided according to the pressure of hydrogen, so that the hydrogen pressure reducing device can realize the pressure reducing treatment of hydrogen with different flow rates, different pressures and different pressure reducing requirements, thereby improving the applicability.

[0019] Optionally, a plurality of the first pressure reducing tube set and a plurality of the second pressure reducing tube set are provided.

[0020] By adopting the above technical solution, the first pressure reducing tube group and the second pressure reducing tube group are both redundantly arranged, so that the reliability can be improved by arranging a spare tube group; at the same time, the first pressure reducing tube group and the second pressure reducing tube group are respectively connected with the matching of hydrogen with different flow rates, so as to improve the accuracy of pressure reduction, and the pressure reduction efficiency can be improved by simultaneously delivering through multiple tube groups.

[0021] Optionally, the control mechanism includes two cut-off components, which are arranged in parallel, one end of the cut-off component is connected to the input mechanism, and the other end of the cut-off component is connected to the pressure reducing mechanism.

[0022] By adopting the above technical solution, the cut-off component is used to selectively connect or disconnect the input mechanism and the pressure reducing mechanism, and by arranging two cut-off components in parallel, the reliability during conduction is improved to avoid affecting the use due to the failure of a single cut-off component.

[0023] Optionally, the input pipe group includes a plurality of input pipelines, and the plurality of input pipelines are arranged in parallel. The control mechanism further includes a flow detection component, and the flow detection component is used to detect the total input flow of the plurality of input pipelines.

[0024] By adopting the above technical solution, the flow detection component can detect the total input flow so as to timely obtain the total input flow of hydrogen input to the pressure reducing mechanism. On the one hand, the storage component can be replaced in time to ensure the continuous supply of hydrogen and avoid the total input flow decreasing due to the reduction of hydrogen in the storage component, thereby affecting the use; on the other hand, the first pressure reducing tube group or the second pressure reducing tube group can be selectively connected according to the size of the total input flow.

[0025] Optionally, an alarm is further provided, the alarm being connected to the input pipe set, and the alarm is activated when the total input flow is less than a threshold value.

[0026] By adopting the above technical solution, during the decompression process of hydrogen, the sound or visual display of the alarm can serve as a reminder, so as to timely check whether a fault occurs or whether the storage component needs to be replaced, which helps to ensure the continuity and stability of the hydrogen decompression process.

[0027] Optionally, it further comprises a user port, wherein the user port is arranged at one end of the pressure reducing mechanism away from the control mechanism, and a flow meter is arranged between the pressure reducing mechanism and the user port.

[0028] By adopting the above technical solution, the decompressed hydrogen is delivered to the user port for use; by arranging a flow meter between the decompression mechanism and the user port, the flow of the decompressed hydrogen can be easily obtained, so that when the flow value displayed by the flow meter is significantly different from the total input flow, timely maintenance can be carried out to improve reliability.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. Both the first valve body and the second valve body are used to realize hydrogen decompression. The blocking mechanism is used to selectively connect the first valve body and the second valve body, so that when the hydrogen pressure is relatively low and the decompression requirement is relatively low, the second outlet end can be disconnected by the second end of the blocking mechanism, so that the hydrogen can enter the first valve body through the first inlet end and be discharged from the first outlet end, thereby realizing the first-stage decompression of the hydrogen; when the hydrogen pressure is relatively high and the decompression requirement is relatively high, the first end of the blocking mechanism disconnects the first outlet end, so that the hydrogen enters the first valve body through the first inlet end, enters the second valve body from the second outlet end and is decompressed, and is discharged from the third outlet end, so that the hydrogen passes through the first valve body and the second valve body in sequence, thereby realizing the second-stage decompression, thereby realizing the adjustment of the decompression capacity, improving the adjustability of the decompression capacity of the hydrogen pressure reducing valve, so as to be suitable for hydrogen of different pressures and different decompression requirements, thereby improving the applicability;

[0031] 2. The first gas outlet end is of a first preset length, and the second gas outlet end is of a second preset length, so that the first avoidance groove and the second avoidance groove have a setting space; the first plug-in connector and the second plug-in connector are respectively arranged on both sides of the connecting member, so that the blocking mechanism is an integral whole, so that it is convenient to make only one of the first plug-in connector and the second plug-in connector realize plug-in, that is, only one of the first gas outlet end and the second gas outlet end is blocked, and the hydrogen pressure reducing valve is a first-stage pressure reducing valve or a second-stage pressure reducing valve; the first plug-in connector and the second plug-in connector have an arc, which is convenient for plug-in by reciprocating along the same arc of the connecting member on the one hand, and can reduce the impact force of hydrogen on the first plug-in connector or the second plug-in connector on the other hand, so that the hydrogen can flow along the arc after contacting the first plug-in connector or the second plug-in connector to disperse the impact force, or even flow back, thereby improving the reliability of blocking;

[0032] 3. The storage assembly is detachably connected to the input pipe group to facilitate replacement of the storage assembly, thereby continuously providing hydrogen; the control mechanism controls the on / off switching between the input mechanism and the pressure reducing mechanism so as to reduce the pressure of hydrogen and output the hydrogen according to the use requirements; at the same time, since the first pressure reducing pipe group and the second pressure reducing pipe group of the pressure reducing mechanism have different delivery flow rates, it is easier to apply to hydrogen with different flow rates, thereby improving the accuracy of pressure reduction; and since the first pressure reducing pipe group and the second pressure reducing pipe group are both provided with the above-mentioned hydrogen pressure reducing valve, appropriate pressure reducing capacity can be provided according to the pressure of the hydrogen, thereby enabling the hydrogen pressure reducing device to achieve pressure reducing treatment of hydrogen with different flow rates, different pressures and different pressure reducing requirements, thereby improving applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the first-stage pressure reduction of the hydrogen pressure reducing valve in an embodiment of the present application.

[0034] Figure 2 It is a top view of the hydrogen pressure reducing valve of the embodiment of the present application during the first stage of pressure reduction.

[0035] Figure 3 yes Figure 2 Cross-section view at AA in the middle.

[0036] Figure 4 It is a schematic diagram of the first valve core assembly of an embodiment of the present application.

[0037] Figure 5 It is a schematic diagram of the second valve core assembly of an embodiment of the present application.

[0038] Figure 6 It is a schematic diagram of a blocking mechanism according to an embodiment of the present application.

[0039] Figure 7 It is a schematic diagram of the hydrogen pressure reducing valve in the embodiment of the present application during the second-stage pressure reduction.

[0040] Figure 8 It is a top view of the hydrogen pressure reducing valve of the embodiment of the present application during the second-stage pressure reduction.

[0041] Fig. 9 yes Figure 8 Cross-section view at the middle BB.

[0042] Fig.10 Schematic diagram of a hydrogen pressure reducing device according to an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 1. first valve body; 11. first air inlet end; 12. first air outlet end; 121. first avoidance groove; 122. first side surface; 123. second side surface; 13. second air outlet end; 14. first valve core assembly; 141. first valve stem; 1411. first passage; 142. first elastic member; 15. first air inlet cavity; 16. first pressure relief cavity;

[0045] 2. second valve body; 21. second air inlet end; 22. third air outlet end; 221. second avoidance groove; 222. third side surface; 223. fourth side surface; 23. second valve core assembly; 231. second valve stem; 2311. second passage; 232. second elastic member; 24. second air inlet cavity; 25. second pressure relief cavity; 26. fixing member;

[0046] 3. Blocking mechanism; 31. First plug connector; 311. First sealing portion; 32. Second plug connector; 321. Second sealing portion; 33. Connector; 34. Blocking block;

[0047] 10. Hydrogen pressure reducing valve;

[0048] 100, input mechanism; 110, storage assembly; 120, input pipe group; 130, input pipeline; 140, alarm;

[0049] 200, control mechanism; 210, cut-off component; 220, flow detection component;

[0050] 300, decompression mechanism; 310, first decompression tube set; 320, second decompression tube set;

[0051] 400, user port; 500, flow meter. DETAILED DESCRIPTION

[0052] The following is combined with Figure 1 -Attached Fig.10 The present application is further described in detail. In this embodiment, if not clearly specified, "connected", "connected" and "fixed" are understood in a broad sense, including fixed connection, detachable connection, connection to form an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through an intermediary, internal connection and interaction between two elements, etc., which can be understood according to the specific circumstances. In the absence of any contrary explanation, the directional words used in this application, such as "inside" and "outside", refer to the outline of the corresponding parts themselves.

[0053] like Figure 1 As shown, in the first aspect, an embodiment of the present application discloses a hydrogen pressure reducing valve (hereinafter referred to as “pressure reducing valve”), which includes a first valve body 1, a second valve body 2 and a blocking mechanism 3, for achieving the pressure reducing effect on hydrogen.

[0054] like Figure 1 , Figure 2 and Figure 3 As shown, the first valve body 1 is used to decompress hydrogen. A first cavity is provided in the first valve body 1, so that hydrogen can achieve preliminary decompression in the first cavity. The first valve body 1 includes a first gas inlet end 11, a first gas outlet end 12 and a second gas outlet end 13. The first gas inlet end 11 is connected to the first gas outlet end 12 and the second gas outlet end 13. Hydrogen enters the first cavity from the first gas inlet end 11, and can be discharged to the outside of the first valve body 1 through the first gas outlet end 12 or the second gas outlet end 13 after being decompressed in the first cavity.

[0055] like Figure 3 and Figure 4As shown, a first valve core assembly 14 is provided in the first cavity, and the first valve core assembly 14 reciprocates in the first cavity so that hydrogen can be decompressed in the first cavity. The first valve core assembly 14 divides the first cavity into a first air inlet cavity 15 and a first decompression cavity 16. The first valve core assembly 14 includes a first valve stem 141 and a first elastic member 142. The first valve stem 141 is movably arranged in the first cavity, and the first end of the first valve stem 141 cooperates with the first air inlet end 11. The first air inlet end 11 is opened or blocked by the reciprocating movement of the first valve stem 141. The first elastic member 142 is sleeved on the outer periphery of the first valve stem 141, and one end of the first elastic member 142 is connected to the inner wall of the first cavity, and the other end of the first elastic member 142 is connected to the second end of the first valve stem 141, so that the first valve stem 141 can reciprocate in the first cavity.

[0056] The first valve stem 141 is provided with a first channel 1411, and the two ends of the first channel 1411 are connected to the first air inlet chamber 15 and the first decompression chamber 16 respectively. A first sealing structure is slidably provided on the outer periphery of the first end of the first valve stem 141, and the first sealing structure is fixed to the inner wall of the first cavity; a second sealing structure is fixedly provided on the outer periphery of the second end of the first valve stem 141, and the second sealing structure is slidably connected to the inner wall of the first cavity, so that the outer periphery of the first valve stem 141 and the inner wall of the first cavity are sealed, and hydrogen can only flow from the first air inlet chamber 15 to the first decompression chamber 16 through the first channel 1411. When hydrogen is input from the first air inlet end 11, the first end of the first valve stem 141 is pushed, and the first elastic member 142 is stretched, so that hydrogen enters the first air inlet chamber 15; and further flows from the first channel 1411 to the first decompression chamber 16 on the side of the second end of the first valve stem 141 away from the first air inlet end 11. Since the cross-sectional area of ​​the first end of the first valve stem 141 is smaller than the cross-sectional area of ​​the second end of the first valve stem 141 , the force-bearing area of ​​the hydrogen gas is increased when it reaches the first decompression chamber 16 , thereby achieving a decompression effect.

[0057] like Figure 3 and Figure 4 As shown, when hydrogen continues to enter the first valve body 1, the pressure in the first decompression chamber 16 increases, causing the first valve stem 141 to move toward the first gas inlet end 11, so that the first end of the first valve stem 141 blocks the first gas inlet end 11, reducing the hydrogen flow in the first cavity, thereby effectively achieving the decompression of the hydrogen.

[0058] like Figure 3 and Figure 5As shown, the second valve body 2 is used to decompress the hydrogen. The second valve body 2 is provided with a second cavity, and the hydrogen can be decompressed in the second cavity. The second valve body 2 includes a second air inlet 21 and a third air outlet 22, the second air inlet 21 is connected to the second air outlet 13, and the first air outlet 12 and the third air outlet 22 are both connected to the atmosphere to discharge the decompressed hydrogen. The connection method between the second valve body 2 and the first valve body 1 is not limited, and it is sufficient to ensure that the secondary decompression function of the pressure reducing valve is realized while being reliably connected. The first air outlet 12 and the third air outlet 22 can be connected to the same output pipe for outputting hydrogen, so as to achieve connection with other structures without changing the connection position according to the hydrogen output position.

[0059] A second valve core assembly 23 is provided in the second cavity, and the second valve core assembly 23 is movably provided in the second cavity. The second valve core assembly 23 divides the second cavity into a second air inlet cavity 24 and a second decompression cavity 25. The second valve core assembly 23 includes a second valve stem 231 and a second elastic member 232. A fixing member 26 is provided in the second cavity, and the fixing member 26 is fixedly connected to the inner wall of the second cavity. A through hole is provided on the fixing member 26, so that the hydrogen input from the second air inlet end 21 can enter the second air inlet cavity 24 through the through hole. The cross-sectional area of ​​the first end of the second valve stem 231 is smaller than the cross-sectional area of ​​the second end of the second valve stem 231. The second elastic member 232 is sleeved on the outer periphery of the first end of the second valve stem 231. One end of the second elastic member 232 is fixedly connected to the second end of the second valve stem 231, and the other end of the second elastic member 232 is fixedly connected to the inner wall of the second cavity, so that the second valve stem 231 can realize reciprocating movement in the second cavity. The first end of the second valve stem 231 abuts against the through hole. After the hydrogen enters the second air inlet chamber 24, the hydrogen pushes the first end of the second valve stem 231 through the through hole. A second channel 2311 is provided in the second valve stem 231. The second channel 2311 runs through the second valve stem 231, so that the hydrogen can enter the second decompression chamber 25 from the second air inlet chamber 24 through the second channel 2311.

[0060] like Figure 3-Figure 5As shown, when the hydrogen pressure in the second decompression chamber 25 increases, the second valve stem 231 is pushed to move in the direction close to the second air inlet end 21, and the through hole on the fixing member 26 is blocked by the first end of the second valve stem 231 to prevent hydrogen from continuing to enter the second air inlet chamber 24, thereby reducing the pressure of the hydrogen in the second decompression chamber in the process of pushing the second valve stem 231. The first elastic member 142 and the second elastic member 232 can both be springs, and the length, stiffness and other parameters of the spring can be selected as needed, so that the pressure reducing valve can achieve the primary or secondary pressure reducing function. It can be understood that the pressure reducing principle of the second valve body 2 is similar to that of the first valve body 1. In view of the fact that the structure and pressure reducing principle of the pressure reducing valve are disclosed in the related art, the principle and structure of the pressure reducing valve are not described in detail here. When in use, a suitable pressure reducing valve can be selected as the valve core structure of the first valve body 1 and the second valve body 2 and the cavity for accommodating the valve core structure as needed to achieve the pressure reducing function.

[0061] like Figure 1-Figure 3 As shown, the pressure reducing valve of this embodiment further includes a blocking mechanism 3. The blocking mechanism 3 is provided with a first end and a second end, and the first end and the second end of the blocking mechanism 3 are respectively movably arranged in the first gas outlet end 12 and the second gas outlet end 13, so as to selectively block the first gas outlet end 12 or the second gas outlet end 13, thereby changing the flow path and the pressure reducing effect of hydrogen, so that the output pressure of hydrogen can be flexibly adjusted during the pressure reducing process, improving the applicability of the pressure reducing valve, and enabling the pressure reducing valve to maintain a stable pressure reducing effect under different working conditions, which not only improves the pressure reducing efficiency, but also enhances the safety of use.

[0062] Since both the first valve body 1 and the second valve body 2 are used to realize hydrogen decompression, when the hydrogen pressure is relatively low and the decompression requirement is relatively low, the second outlet end 13 can be disconnected by the second end of the blocking mechanism 3, so that hydrogen enters the first valve body 1 through the first inlet end 11 and is discharged from the first outlet end 12, thereby realizing the first-stage decompression of hydrogen. When the hydrogen pressure is relatively high and the decompression requirement is high, the first outlet end 12 is disconnected by the first end of the blocking mechanism 3, so that hydrogen enters the first valve body 1 through the first inlet end 11, and realizes the first-stage decompression in the first valve body 1; then, it enters the second valve body 2 through the second outlet end 13 to realize the second decompression, and is discharged from the third outlet end 22. The hydrogen passes through the first valve body 1 and the second valve body 2 in sequence, thereby realizing the second-stage decompression. By setting the blocking mechanism 3, the pressure reducing valve can realize the adjustment of the decompression capacity, selectively play the first-stage decompression or the second-stage decompression role, improve the adjustability of the pressure reducing capacity of the pressure reducing valve, so as to be suitable for hydrogen with different initial pressures and different decompression requirements, thereby improving the applicability of the pressure reducing valve. The pressure reducing valve can achieve hydrogen pressure reduction by means of two-stage pressure reduction, reduce the use risk caused by excessive hydrogen pressure, solve the problem of insufficient pressure reduction capacity caused by one-stage pressure regulation, optimize the pressure regulation effect on hydrogen, improve the pressure regulation accuracy, and make the output hydrogen meet the pressure requirements.

[0063] like Figure 1-Figure 3 As shown, optionally, the first air outlet end 12 is set to a first preset length, and the second air outlet end 13 is set to a second preset length, so as to achieve the blocking effect of the blocking mechanism 3. The first preset length and the second preset length can be set as needed to reserve space for the realization of the blocking function of the blocking mechanism 3. The blocking mechanism 3 includes a first plug-in connector 31, a second plug-in connector 32 and a connecting member 33, and the first plug-in connector 31 and the second plug-in connector 32 are respectively arranged on both sides of the connecting member 33. The first air outlet end 12 is provided with a first avoidance groove 121, and the second air outlet end 13 is provided with a second avoidance groove 221. The first air outlet end 12 is the first preset length, and the second air outlet end 13 is the second preset length, which can also make the first avoidance groove 121 and the second avoidance groove 221 have setting space.

[0064] The first connector 31 is slidably inserted into the first avoidance groove 121, and the second connector 32 is slidably inserted into the second avoidance groove 221, so as to respectively block the first gas outlet 12 and the second gas outlet 13 through the first connector 31 and the second connector 32. Since the first connector 31 and the second connector 32 are connected to the two ends of the same connector 33, the blocking mechanism 3 is a whole, so that when the connector 33 moves, only one of the first connector 31 and the second connector 32 is plugged in, that is, only one of the first gas outlet 12 and the second gas outlet 13 is blocked, so that the pressure reducing valve is in the first pressure reducing state or the second pressure reducing state.

[0065] like Figure 1-Figure 3 As shown, both the first connector 31 and the second connector 32 have an arc, which, on the one hand, facilitates the connection through the reciprocating movement of the connector 33 along the same arc; on the other hand, it can reduce the impact force of hydrogen on the first connector 31 or the second connector 32, so that the hydrogen can flow along the arc after contacting the first connector 31 or the second connector 32 to disperse the impact force, or even reflux, thereby improving the reliability of blocking. At the same time, both the first connector 31 and the second connector 32 have an arc, which not only increases their structural strength, but also helps to reliably abut the blocking mechanism 3 against the inner side of the first outlet end 12 or the second outlet end 13, thereby improving the sealing performance.

[0066] like Figure 2 , Figure 3 and Figure 6As shown, optionally, the cross-sectional area of ​​the first connector 31 is greater than or equal to the cross-sectional area of ​​the inner cavity of the first outlet 12 for circulating gas, and the cross-sectional area of ​​the second connector 32 is greater than or equal to the cross-sectional area of ​​the inner cavity of the second outlet 13 for circulating gas. In this embodiment, two blocking blocks 34 are provided in the first outlet 12 and the second outlet 13, and the cross-sectional area of ​​the inner cavity for circulating gas is between the two blocking blocks 34. The first connector 31 and the second connector 32 are used to cooperate with the inner cavity between the two blocking blocks 34 to achieve blocking. The size relationship between the first connector 31 and the first avoidance groove 121, and the size relationship between the second connector 32 and the second avoidance groove 221 can be determined according to the usage, so that after the first connector 31 is inserted into the first outlet 12, the first avoidance groove 121 will not leak, and after the second connector 32 is inserted into the second outlet 13, the second avoidance groove 221 will not leak. It is understandable that a certain sealing structure can be provided as required to ensure the decompression and gas delivery effects.

[0067] like Figure 2 , Figure 3 and Figure 6 As shown, optionally, a first sealing portion 311 is provided at one end of the first connector 31 away from the connector 33. The first side of the first sealing portion 311 away from the connector 33 is arranged in a first arc, so that when the first connector 31 is extended into the first air outlet 12 to block the first air outlet 12, the first side of the first sealing portion 311 is in contact with the first side surface 122 of the first air outlet 12; the second side of the first sealing portion 311 close to the connector 33 is arranged in a second arc, so that when the first connector 31 is pulled out to connect the first air outlet 12, the second side of the first sealing portion 311 is in contact with the second side surface 123 of the first air outlet 12.

[0068] The second plug connector 32 is provided with a second sealing portion 321 at one end away from the connector 33. The second sealing portion 321 is arranged at a third arc angle away from the first side of the connector 33, so that when the second plug connector 32 is inserted into the second air outlet 13 for blocking, the first side of the second sealing portion 321 is in contact with the third side surface 222 of the second air outlet 13; the second sealing portion 321 is arranged at a fourth arc angle close to the second side of the connector 33, so that when the second plug connector 32 is pulled out to connect the second air outlet 13, the second side of the second sealing portion 321 is in contact with the fourth side surface 223 of the second air outlet 13. In this embodiment, the cross-sections of the first sealing portion 311 and the second sealing portion 321 can be a shape in which one set of opposite sides are parallel straight lines and the other set of opposite sides are convex to the outside, similar to the cross-section shape of a rugby ball with two flat tips, so as to optimize the degree of fit and improve the reliability of blocking when inserted for blocking; when extended for connection, effective sealing of the avoidance groove is ensured.

[0069] like Figure 2 , Figure 3 and Figure 6 As shown, the side of the connecting member 33 close to the first gas outlet end 12 is arranged in a second arc, and the side of the connecting member 33 close to the second gas outlet end 13 is arranged in a fourth arc. The first side of the first sealing portion 311 can be fitted with the first side surface 122 of the first air outlet end 12, the second side of the first sealing portion 311 can be fitted with the second side surface 123 of the first air outlet end 12, the first side of the second sealing portion 321 can be fitted with the third side surface 222 of the second air outlet end 13, the second side of the second sealing portion 321 can be fitted with the fourth side surface 223 of the second air outlet end 13, and the two sides of the connecting piece 33 can respectively fit with the outer periphery of the first air outlet end 12 and the outer periphery of the second air outlet end 13, so that the first connector 31 and the second connector 32 can maintain sealing during sealing to ensure the sealing effect; at the same time, when the first connector 31 or the second connector 32 is blocked, multiple limiting and positioning functions can be achieved through the first sealing portion 311, the second sealing portion 321 and the connecting piece 33, which helps to improve positioning accuracy and improve blocking reliability.

[0070] like Figure 2 , Figure 3 and Figure 6 As shown, the first connector 31 and the second connector 32 with an arc help to increase the contact area between the first sealing portion 311 and the first outlet end 12, and between the second sealing portion 321 and the second outlet end 13, thereby improving the sealing effect and obtaining better pressure reduction stability. The plug-in blocking method enables the blocking mechanism 3 to operate quickly and accurately when needed, so as to quickly and easily switch between the first-stage pressure reduction and the second-stage pressure reduction. After the second connector 32 is inserted into the second outlet end 13, the second outlet end 13 can be reliably blocked to prevent hydrogen from being discharged through the second outlet end 13 to the third outlet end 22 and discharged, and the hydrogen flow of the corresponding outlet end is completely blocked.

[0071] like Figure 7 , Figure 8 and Fig. 9 As shown, after the first plug-in component 31 is inserted into the first gas outlet 12, it can reliably block the first gas outlet 12 to prevent hydrogen from being discharged through the first gas outlet 12, thereby achieving precise control of the output pressure. The first sealing portion 311 and the second sealing portion 321 can be a rubber block or other materials that can achieve sealing and have a certain degree of flexibility, so as to achieve effective sealing of the first avoidance groove 121 and the second avoidance groove 221 while achieving sealing performance.

[0072] like Figure 2 , Figure 6 and Figure 7As shown, the connecting member 33 includes a swing cylinder, a connecting rod and an arc plate. The swing cylinder is fixed on the first valve body 1, and the movable end of the swing cylinder is connected to the first end of the connecting rod, and the second end of the connecting rod is connected to the arc plate, so that the connecting rod is driven to rotate by the swing cylinder, so that the arc plate can rotate around the swing cylinder, thereby realizing the plug-in connection between the first connector 31 and the first air outlet end 12 or the plug-in connection between the second connector 32 and the second air outlet end 13, and can be tightened by the swing cylinder. The first outer sealing block and the second outer sealing block are provided at both ends of the arc plate, which are respectively used to realize the limiting and sealing of the first air outlet end 12 and the second air outlet end 13. The two sides of the first outer sealing block are respectively connected to the first connector 31 and the arc plate, and the two sides of the second outer sealing block are respectively connected to the second connector block 32 and the arc plate. The first outer sealing block and the second outer sealing block are both structures with curvature on both sides. The first outer sealing block and the second outer sealing block can be made of flexible materials such as rubber. The first outer sealing block and the second outer sealing block have gaps with the ends of the arc plate to reserve space for the deformation of the first outer sealing block and the second outer sealing block during sealing to ensure the sealing effect. The first outer sealing block can also be slidably inserted on the first plug-in component 31, and the second outer sealing block can also be slidably inserted on the second plug-in component 32. The first plug-in component 31 and the second plug-in component 32 can both be plate-shaped components with curvature.

[0073] The implementation principle of a hydrogen pressure reducing valve in the embodiment of the present application is as follows: when the pressure of the input hydrogen is relatively low and the pressure reduction requirement is relatively low, the swing cylinder is started to make the second connector 32 block the second gas outlet 13, and the hydrogen pushes the first valve core component 14 from the first gas inlet end 11, enters the first gas inlet chamber 15, and enters the first pressure reducing chamber 16 through the first channel 1411. After the pressure in the first pressure reducing chamber 16 increases, the first valve core component 14 is pushed to block the first gas inlet end 11, limiting the hydrogen flow in the first valve body 1, so that the hydrogen can achieve a first-level pressure reduction in the first valve body 1; when the pressure of the input hydrogen is relatively high and the pressure reduction requirement is relatively high, the swing cylinder drives the first connector 31 to block the first gas outlet 12, and the hydrogen After the first valve core assembly 14 is pushed open by the first air inlet end 11 to realize decompression in the first cavity, the hydrogen enters the second cavity through the second air inlet end 21, pushes open the second valve core assembly 23, and the hydrogen enters the second decompression cavity 25 through the second channel 2311 from the second air inlet cavity 24. After the hydrogen pressure in the second decompression cavity 25 increases, the second valve core assembly 23 can be pushed to block the second air inlet end 21, so that the hydrogen flow in the second valve body 2 is reduced to realize secondary decompression of hydrogen in the second cavity. Therefore, through the action of the blocking mechanism 3, the pressure reducing valve can selectively realize primary decompression or secondary decompression, thereby improving the adjustability of the pressure reducing capacity of the pressure reducing valve and facilitating precise control of the pressure of the output hydrogen.

[0074] like Fig.10As shown, in the second aspect, the embodiment of the present application discloses a hydrogen pressure reducing device (hereinafter referred to as “device”). The device includes the above-mentioned hydrogen pressure reducing valve 10, input mechanism 100, control mechanism 200 and pressure reducing mechanism 300.

[0075] like Fig.10 As shown, the input mechanism 100 includes a storage component 110 and an input pipe group 120. The storage component 110 is used to store hydrogen and can be a tank truck containing hydrogen. The input end of the input pipe group 120 can be provided with a gas unloading metal hose for connection with the tank truck. The input pipe group 120 is used to transport the hydrogen in the storage component 110 to the pressure reducing mechanism 300 under the control of the control mechanism 200 to reduce the pressure of the hydrogen. The storage component 110 and the input pipe group 120 are detachably connected, so that after the hydrogen in a tank truck is output, other tank trucks can be replaced to continue to provide hydrogen to ensure the continuous delivery of hydrogen. One end of the control mechanism 200 is connected to the input pipe group 120, and the pressure reducing mechanism 300 is connected to the other end of the control mechanism 200. The control mechanism 200 is used to control the on-off between the input mechanism 100 and the pressure reducing mechanism 300, so that the hydrogen can be decompressed and output according to the needs of use.

[0076] The input mechanism 100 is also provided with necessary inlet ball valves and high-pressure filters, through which the tank truck can selectively connect to the input pipe group 120, so as to realize hydrogen input after the tank truck stops and is reliably connected; the high-pressure filter is used to remove impurities in the pipe group, improve the quality and safety of gas transmission. When the device is started for the first time, the pipe head of the gas unloading metal hose is first blocked, and it is checked for leakage by nitrogen purge, and the tank truck is connected after ensuring safety.

[0077] like Figure 1 and Fig.10 As shown, the pressure reducing mechanism 300 includes a first pressure reducing tube group 310 and a second pressure reducing tube group 320. The conveying flow rate of the first pressure reducing tube group 310 is greater than that of the second pressure reducing tube group 320, so that it is easier to apply to hydrogen with different flow rates, thereby improving the accuracy of the pressure reducing process. When the control mechanism 200 conducts the input mechanism 100 and the pressure reducing mechanism 300, the first pressure reducing tube group 310 or the second pressure reducing tube group 320 is connected to the input mechanism 100, and the first pressure reducing tube group 310 and the second pressure reducing tube group 320 are both provided with a hydrogen pressure reducing valve 10. The device can reduce the hydrogen pressure to 1.15MPa-1.25MPa through the pressure reducing mechanism 300.

[0078] Several hydrogen pressure reducing valves 10 are connected to the first pressure reducing pipe group 310 and the second pressure reducing pipe group 320 respectively, so that after hydrogen enters the pressure reducing mechanism 300, it can be input into the hydrogen pressure reducing valve 10 from the first air inlet end 11, and output from the hydrogen pressure reducing valve 10 from the first air outlet end 12 or the third air outlet end 22, so as to realize the pressure reduction of hydrogen in the pressure reducing mechanism 300, so as to output the hydrogen after pressure reduction. It is understandable that the first pressure reducing pipe group 310 and the second pressure reducing pipe group 320 can also be connected to the input mechanism 100 at the same time, and respectively realize pressure reduction to cope with the situation that the flow rate of the input hydrogen is too large. According to user needs or system settings, the control mechanism 200 can also adjust the output ratio of the first pressure reducing pipe group 310 and the second pressure reducing pipe group 320 in real time, so as to meet the gas demand of the user to the greatest extent under the premise of ensuring safety. The device is provided with two kinds of pressure reducing pipelines with large flow and small flow for protection, so as to solve the problem of insufficient pressure regulation accuracy, and can selectively connect the first pressure reducing pipe group 310 or the second pressure reducing pipe group 320 as needed; at the same time, since the first pressure reducing pipe group 310 and the second pressure reducing pipe group 320 are both provided with the above-mentioned hydrogen pressure reducing valve 10, appropriate pressure reducing capacity can be provided according to the pressure of hydrogen, so that the pressure reducing treatment of hydrogen with different flow rates, different pressures and different pressure reducing requirements can be realized through the device, thereby improving applicability.

[0079] like Fig.10 As shown, optionally, the first pressure reducing tube group 310 and the second pressure reducing tube group 320 are each provided with a plurality of them. In this embodiment, the first pressure reducing tube group 310 is used to transport a large flow of hydrogen, and the second pressure reducing tube group 320 is used to transport a small flow of hydrogen. The first pressure reducing tube group 310 is provided with three routes, each with a flow rate of 5000Nm³ / h, and the three routes are arranged in parallel. The two routes are arranged in a two-for-one-standby manner to improve the transportation reliability; the second pressure reducing tube group 320 is provided with two parallel routes, each with a flow rate of 600Nm³ / h, and is arranged in a one-for-one-standby manner. Since the risk of large flow hydrogen transportation process is relatively high, the safety is improved by setting two enabling pipelines. The redundant setting of the first pressure reducing tube group 310 and the second pressure reducing tube group 320 helps to improve reliability; at the same time, the first pressure reducing tube group 310 and the second pressure reducing tube group 320 are respectively connected with the matching of hydrogen with different flow rates, which can improve the accuracy of pressure reduction, and can improve the pressure reduction efficiency by delivering multiple tube groups at the same time. Each pressure reducing pipeline is equipped with a safety valve. The valves before and after the safety valve are sealed open. These valves must be kept open when the equipment is running to prevent operators from accidentally closing such valves and affecting the operation of the equipment. The discharge pipelines of the five safety valves are combined into one pipeline and equipped with flame arresters to ensure the safe operation of the equipment.

[0080] like Fig.10As shown, optionally, the control mechanism 200 includes two cut-off components 210, and the two cut-off components 210 are arranged in parallel. One end of the cut-off component 210 is connected to the input mechanism 100, and the other end of the cut-off component 210 is connected to the pressure reducing mechanism 300, which is used to selectively connect or disconnect the input mechanism 100 and the pressure reducing mechanism 300. By arranging two cut-off components 210 in parallel, the reliability and redundancy of the system are improved, the reliability of the conduction time is improved, and the use is avoided due to the failure of a single cut-off component 210. The cut-off component 210 includes a cut-off valve and a connecting pipeline, and the cut-off valve is arranged on the connecting pipeline, which is used to selectively connect or disconnect the connecting pipeline, and the two ends of the connecting pipeline are respectively connected to the input mechanism 100 and the pressure reducing mechanism 300. A valve body can be arranged between the control mechanism 200 and the first pressure reducing pipe group 310, and between the control mechanism 200 and the second pressure reducing pipe group 320, so that hydrogen can be transported from the input mechanism 100 to the first pressure reducing pipe group 310 or the second pressure reducing pipe group 320 to achieve pressure reduction.

[0081] Optionally, the input pipe group 120 includes a plurality of input pipes 130, which are arranged in parallel so that when one input pipe 130 fails or the amount of hydrogen is insufficient, other input pipes 130 can be used to make up for the failure, thereby improving the continuity and stability of hydrogen supply. The tank trucks and the input pipes 130 are arranged in a one-to-one correspondence; each input pipe 130 is provided with a check valve to prevent the high pressure from flowing back to the tank truck when the tank truck pressure is low.

[0082] like Fig.10 As shown, the control mechanism 200 also includes a flow detection component 220, which is used to detect the total input flow of several input pipelines 130, so as to timely obtain the total input flow of hydrogen input to the pressure reducing mechanism 300. The flow detection component 220 can be a gas flow detector. On the one hand, it can replace the storage component 110 in time by real-time monitoring the total input flow value to ensure the continuous supply of hydrogen and avoid the total input flow rate decreasing due to the reduction of the amount of hydrogen in the storage component 110, which affects the use; on the other hand, it can selectively connect the first pressure reducing tube group 310 or the second pressure reducing tube group 320 according to the size of the total input flow rate to improve the pressure reducing accuracy. It should be noted that the control mechanism 200 has a necessary electrical connection relationship with other mechanisms.

[0083] like Fig.10 As shown, the device may further include a user port 400. The user port 400 is disposed at one end of the decompression mechanism 300 away from the control mechanism 200, and the user port 400 is used to receive the decompressed hydrogen for use.

[0084] A flow meter 500 is provided between the pressure reducing mechanism 300 and the user port 400, which is used to accurately measure and display the hydrogen flow output to the user port 400, and can conveniently obtain the flow of hydrogen after pressure reduction, so that when the flow value displayed by the flow meter 500 is significantly different from the total input flow, timely maintenance can be carried out to improve the reliability of the device. At the same time, the rear ends of the five pressure reducing pipelines are aggregated into a main pipeline, and the flow meter 500 is provided on the main pipeline, which helps to provide users with clear and accurate gas usage data and provide a more transparent and controllable gas usage experience.

[0085] like Fig.10 As shown, optionally, the device is also provided with an alarm 140. The alarm 140 is connected to the input pipe group 120, so that when the total input flow is less than the set flow threshold, the alarm 140 starts the alarm. This embodiment further refines the control logic of the device. Specifically, the control mechanism 200 dynamically adjusts the working state of the cut-off component 210 according to the total input flow data monitored in real time by the flow detection member 220 to ensure that the input pipe group 120 can stably and efficiently deliver hydrogen to the pressure reducing mechanism 300. The control mechanism 200 can also be electrically connected to the alarm 140. When the total input flow is lower than the preset threshold, the control mechanism 200 can trigger the alarm function of the alarm 140; at the same time, by adjusting the on-off state of the cut-off component 210, try to restore or optimize the input flow of hydrogen. For example, when a certain input pipeline 130 is blocked or the flow rate decreases, other input pipelines 130 are connected in time to increase the total input flow to ensure the stability of the overall input flow. The type of alarm 140 can be selected as needed, for example, it can be a buzzer, or it can be a display screen that displays alarm information.

[0086] like Fig.10 As shown, in this embodiment, multiple alarms 140 can be provided, which are respectively provided on each input pipeline 130. During the decompression process of hydrogen, the alarm 140 can be used as a reminder through the sound or visual display, so as to promptly notify the operator to handle it, thereby promptly checking whether the input pipeline 130 where the alarm 140 is located has a fault or whether the storage component 110 needs to be replaced, which helps to ensure the continuity and stability of the hydrogen decompression process and improve safety. The number, location and connection relationship of the alarm 140 can be set as needed.

[0087] It is understandable that the device also includes necessary structures for connecting, supporting, driving, controlling, sealing, pressure relief and realizing pipeline on-off conversion and other functions, such as: safety valves, check valves, flame arresters, filters and other structures, so that the device can operate normally and safely; the shape, size, material and other parameters of each part of the device can be determined as needed, as long as the corresponding functions can be realized. The options such as the selection of the first pressure reducing tube group 310 and the second pressure reducing tube group 320, the selection of the first pressure reducing tube group 310 and the second pressure reducing tube group 320, can be selected according to the needs of use, and the selection criteria are not too limited here. The hydrogen pressure reducing device can be widely used in hydrogen energy vehicles, hydrogen power stations and other fields that require a stable and safe supply of hydrogen, providing strong support for promoting the development of the hydrogen energy industry.

[0088] The implementation principle of a hydrogen pressure reducing device in an embodiment of the present application is as follows: a storage component 110 is connected to an input pipe group 120 to input hydrogen into the device; a control mechanism 200 conducts between the input mechanism 100 and the pressure reducing mechanism 300 so that hydrogen can be delivered to the pressure reducing mechanism 300; when the hydrogen flow rate is large, the hydrogen is allowed to enter the first pressure reducing pipe group 310 to achieve pressure reduction, and when the hydrogen flow rate is small, the hydrogen is allowed to enter the second pressure reducing pipe group 320 to achieve pressure reduction. Different pressure reducing pipe groups are selected to be connected according to different flow rates to improve the pressure reduction accuracy, and the decompressed hydrogen is delivered to the user port 400 for user use.

[0089] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydrogen pressure reducing valve, characterized in that: include: A first valve body (1) is used to reduce the pressure of hydrogen, the first valve body (1) comprising a first gas inlet end (11), a first gas outlet end (12) and a second gas outlet end (13), the first gas inlet end (11) being connected to the first gas outlet end (12) and the second gas outlet end (13); A second valve body (2) is used to reduce the pressure of hydrogen, the second valve body (2) comprising a second gas inlet end (21) and a third gas outlet end (22), the second gas inlet end (21) is connected to the second gas outlet end (13), and the first gas outlet end (12) and the third gas outlet end (22) are both connected to the atmosphere; A blocking mechanism (3), the blocking mechanism (3) being provided with a first end and a second end, the first end and the second end of the blocking mechanism (3) being movably arranged at the first air outlet end (12) and the second air outlet end (13) respectively, and the blocking mechanism (3) being used for selectively blocking the first air outlet end (12) or the second air outlet end (13); The first air outlet end (12) is arranged to have a first preset length, and the second air outlet end (13) is arranged to have a second preset length. The blocking mechanism (3) comprises a first plug-in connector (31), a second plug-in connector (32) and a connecting member (33). The first air outlet end (12) is provided with a first avoidance groove (121), and the second air outlet end (13) is provided with a second avoidance groove (221). The first plug-in connector (31) and the second plug-in connector (32) are arranged on both sides of the connecting member (33). The first plug-in connector (31) is slidably plugged into the first avoidance groove (121), and the second plug-in connector (32) is slidably plugged into the second avoidance groove (221). Both the first plug-in connector (31) and the second plug-in connector (32) have an arc.

2. The hydrogen pressure reducing valve according to claim 1, characterized in that: The cross-sectional area of ​​the first plug-in connector (31) is greater than or equal to the cross-sectional area of ​​the inner cavity of the first gas outlet (12) for gas circulation, and the cross-sectional area of ​​the second plug-in connector (32) is greater than or equal to the cross-sectional area of ​​the inner cavity of the second gas outlet (13) for gas circulation.

3. The hydrogen pressure reducing valve according to claim 1, characterized in that: A first sealing portion (311) is provided at one end of the first plug connector (31) away from the connecting member (33); a first side of the first sealing portion (311) away from the connecting member (33) is arranged in a first arc, so that when the first plug connector (31) is extended into and blocks the first air outlet (12), the first side of the first sealing portion (311) abuts against a first side surface (122) of the first air outlet (12); and a second side of the first sealing portion (311) close to the connecting member (33) is arranged in a second arc, so that when the first plug connector (31) is pulled out to connect the first air outlet (12), the second side of the first sealing portion (311) abuts against a second side surface (123) of the first air outlet (12); A second sealing portion (321) is provided at one end of the second plug connector (32) away from the connecting member (33); the first side of the second sealing portion (321) away from the connecting member (33) is arranged in a third arc, so that when the second plug connector (32) is extended into and blocks the second air outlet (13), the first side of the second sealing portion (321) fits against the third side surface (222) of the second air outlet (13); and the second side of the second sealing portion (321) close to the connecting member (33) is arranged in a fourth arc, so that when the second plug connector (32) is pulled out and connected to the second air outlet (13), the second side of the second sealing portion (321) fits against the fourth side surface (223) of the second air outlet (13); A side of the connecting piece (33) close to the first air outlet end (12) is arranged in a second arc, and a side of the connecting piece (33) close to the second air outlet end (13) is arranged in a fourth arc.

4. A hydrogen pressure reducing device, comprising the hydrogen pressure reducing valve (10) according to any one of claims 1 to 3, characterized in that: Also includes: An input mechanism (100) comprises a storage component (110) and an input pipe group (120), wherein the storage component (110) is used to store hydrogen, and the storage component (110) and the input pipe group (120) are detachably connected; A control mechanism (200), one end of the control mechanism (200) being connected to the input pipe set (120); A pressure reducing mechanism (300) is connected to the other end of the control mechanism (200). The control mechanism (200) is used to control the connection and disconnection between the input mechanism (100) and the pressure reducing mechanism (300). The pressure reducing mechanism (300) comprises a first pressure reducing tube group (310) and a second pressure reducing tube group (320). The delivery flow of the first pressure reducing tube group (310) is greater than the delivery flow of the second pressure reducing tube group (320). When the control mechanism (200) conducts the input mechanism (100) and the pressure reducing mechanism (300), at least one of the first pressure reducing tube group (310) and the second pressure reducing tube group (320) is connected to the input mechanism (100). The first pressure reducing tube group (310) and the second pressure reducing tube group (320) are both provided with the hydrogen pressure reducing valve (10), so that hydrogen is input into the hydrogen pressure reducing valve (10) from the first gas inlet end (11) and output from the hydrogen pressure reducing valve (10) from the first gas outlet end (12) or the third gas outlet end (22).

5. The hydrogen decompression device according to claim 4, characterized in that: A plurality of the first pressure reducing tube set (310) and a plurality of the second pressure reducing tube set (320) are provided.

6. The hydrogen decompression device according to claim 4, characterized in that: The control mechanism (200) comprises two cut-off components (210), the cut-off components (210) being arranged in parallel, one end of the cut-off component (210) being connected to the input mechanism (100), and the other end of the cut-off component (210) being connected to the pressure reducing mechanism (300).

7. The hydrogen decompression device according to claim 4, characterized in that: The input pipe group (120) comprises a plurality of input pipelines (130), wherein the plurality of input pipelines (130) are arranged in parallel, and the control mechanism (200) further comprises a flow detection element (220), wherein the flow detection element (220) is used to detect the total input flow of the plurality of input pipelines (130).

8. The hydrogen decompression device according to claim 7, characterized in that: An alarm (140) is also provided. The alarm (140) is connected to the input pipe set (120). When the total input flow rate is less than a threshold value, the alarm (140) starts to alarm.

9. The hydrogen decompression device according to claim 4, characterized in that: It also comprises a user port (400), wherein the user port (400) is arranged at one end of the pressure reducing mechanism (300) away from the control mechanism (200), and a flow meter (500) is arranged between the pressure reducing mechanism (300) and the user port (400).

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