Bottle mouth combination valve, hydrogen storage bottle group and vehicle-mounted hydrogen supply system

Abstract

The invention relates to the technical field of hydrogen storage equipment, in particular to a bottle opening combination valve, a hydrogen storage bottle set and a vehicle-mounted hydrogen supply system. The bottleneck combination valve comprises a shell, a first valve body and a second valve body, the first valve body is installed on the shell and comprises a gas supply channel, a first valve body and a second valve body, the second valve body comprises a pilot valve and a main valve; a first magnetic part and a second magnetic part are arranged in the pilot valve, a main valve is movably arranged in the main valve, a pilot hole is formed in the main valve, and the first magnetic part and the second magnetic part control opening and closing of the pilot hole under the action of magnetic force. The first valve body and the second valve body are integrally installed through the shell, the highly integrated design is adopted, and leakage points of the vehicle-mounted hydrogen system are reduced; the second valve body is composed of a pilot valve and a main valve, the main valve is opened without depending on upstream and downstream pressure difference force of the main valve, the electromagnetic valve has no minimum working pressure requirement, zero-air-pressure opening can be achieved, and complete air supply is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage equipment, and particularly to a bottle mouth combined valve, a hydrogen storage bottle group and a vehicle-mounted hydrogen supply system. Background Art

[0002] A fuel cell can directly convert chemical energy into electrical energy, and has the advantages of high energy conversion efficiency, low pollution, wide fuel sources, low noise, high reliability and easy maintenance. A vehicle-mounted hydrogen supply system for a fuel cell usually consists of a hydrogen filling port, a high-pressure gas cylinder, a bottle mouth valve, a pressure reducing valve, a safety valve, a relief valve, a pressure sensor and pipeline connectors. Among them, the bottle mouth combined valve is a core component of the vehicle-mounted hydrogen supply system and usually has the following functions: 1) An electromagnetic opening / closing control function for high-pressure gas in the gas cylinder; 2) A one-way filling function for the hydrogen storage bottle; 3) An automatic relief function in case of fire or high temperature; 4) A manual closing function for high-pressure gas; 5) A function with overcurrent protection; 6) A manual relief function in an emergency state; 7) A function of filtering impurities in the filling gas and the gas in the gas cylinder; 8) A function of real-time monitoring of the temperature in the gas cylinder.

[0003] However, the bottle mouth combined valve in the related art has the following defects: 1) The product integration degree is low, increasing the leakage points and leakage risks of the vehicle-mounted hydrogen system; 2) The opening of the high-pressure solenoid valve needs to rely on the pressure difference force between the upstream and downstream of the main valve. Usually, the minimum working pressure of the solenoid valve needs to be ≥2 MPa. However, when the minimum working pressure is lower than 2 MPa, the high-pressure solenoid valve cannot be opened, resulting in more residual hydrogen in the gas cylinder and incomplete gas supply. Summary of the Invention

[0004] The present invention provides a bottle mouth combined valve, a hydrogen storage bottle group and a vehicle-mounted hydrogen supply system to solve the defects in the existing bottle mouth combined valve, including low product integration degree and the high-pressure solenoid valve cannot be opened under low pressure difference, resulting in more residual hydrogen in the gas cylinder and incomplete gas supply.

[0005] The present invention provides a bottle mouth combined valve, comprising: A housing; A first valve body, mounted on the housing, and the first valve body includes: A gas supply channel, communicated with the hydrogen storage gas cylinder; A second valve body, mounted on the housing and arranged in the gas supply channel, and the second valve body includes: Pilot valve, which has a first magnetic member and a second magnetic member inside: Main valve, which has a main valve element movably arranged inside, a pilot hole is formed on the main valve element, and the first magnetic member and the second magnetic member control the opening and closing of the pilot hole under the action of magnetic force.

[0006] According to the bottle mouth combination valve provided by the present invention, the pilot valve further includes: Elastic member, arranged between the first magnetic member and the second magnetic member; Pilot valve core, arranged at one end of the elastic member close to the pilot hole. When the first magnetic member and the second magnetic member overcome the elastic force of the elastic member and the pressure difference at both ends of the pilot hole under the action of magnetic force, the pilot valve core is driven to move so as to open the pilot hole.

[0007] According to the bottle mouth combination valve provided by the present invention, the pilot valve further includes: Electromagnetic coil, wound around the outside of the first magnetic member and the second magnetic member; When the electromagnetic coil is energized to generate a magnetic field, the first magnetic member and the second magnetic member generate an electromagnetic force of mutual attraction under the action of the magnetic field to overcome the elastic force of the elastic member and the pressure difference at both ends of the pilot hole, and drive the pilot valve core to move so as to open the pilot hole; When the electromagnetic coil is powered off, the first magnetic member and the second magnetic member drive the pilot valve core to move under the action of the elastic force of the elastic member so as to close the pilot hole.

[0008] According to the bottle mouth combination valve provided by the present invention, the second magnetic member is arranged between the first magnetic member and the main valve element, and a through assembly hole is arranged in the second magnetic member, and the assembly hole is used to accommodate the elastic member and limit the pilot valve core; Wherein, one end of the elastic member passes through the assembly hole and contacts the first magnetic member, the other end of the elastic member is connected to one end of the pilot valve core, and the other end of the pilot valve core can open or close the pilot hole under the drive of the second magnetic member.

[0009] According to the bottle mouth combination valve provided by the present invention, a wedge groove structure is formed at one end of the first magnetic member close to the second magnetic member, and a wedge protrusion structure is formed at one end of the second magnetic member close to the first magnetic member, or; a wedge protrusion structure is formed at one end of the first magnetic member close to the second magnetic member, and a wedge groove structure is formed at one end of the second magnetic member close to the first magnetic member; Wherein, the wedge protrusion is adapted to be embedded in the wedge groove structure.

[0010] According to the bottle neck combined valve provided by the present invention, the second magnetic member is disposed between the first magnetic member and the main valve, and the bottle neck combined valve further includes: A stopper disposed on the second magnetic member for limiting the main valve.

[0011] According to the bottle neck combined valve provided by the present invention, it further includes: An electromagnetic valve sleeve sleeved outside the first magnetic member and the second magnetic member; A first seal disposed outside the electromagnetic valve sleeve; A second seal disposed outside the first magnetic member.

[0012] According to the bottle neck combined valve provided by the present invention, the first magnetic member includes: an armature; the second magnetic member includes: a keeper.

[0013] The present invention also provides a hydrogen storage bottle group, including: The bottle neck combined valve of the present invention; A hydrogen storage bottle, and the bottle neck combined valve is disposed at the bottle neck of the hydrogen storage bottle.

[0014] The present invention also provides a vehicle-mounted hydrogen supply system, including: the bottle neck combined valve of the present invention, or, the hydrogen storage bottle group of the present invention.

[0015] According to the vehicle-mounted hydrogen supply system provided by the present invention, it further includes: A hydrogen filling port; A diverter disposed downstream of the hydrogen filling port and communicated with the bottle neck combined valve; A first pressure sensor disposed on the diverter; A pressure reducing valve connected downstream of the diverter; A safety valve connected downstream of the diverter; A pressure relief valve connected downstream of the diverter; A second pressure sensor connected downstream of the diverter; A controller signal-connected to the first pressure sensor and the second pressure sensor.

[0016] A bottle mouth combined valve provided by the present invention comprises: a housing, a first valve body and a second valve body; the first valve body is installed on the housing and includes: a gas supply channel which is communicated with a hydrogen storage cylinder; the second valve body is installed on the housing and arranged in the gas supply channel, and the second valve body includes: a pilot valve and a main valve; the pilot valve internally has a first magnetic part and a second magnetic part; the main valve internally has a main valve flap movably arranged, a pilot hole is formed on the main valve flap, and the first magnetic part and the second magnetic part control the opening and closing of the pilot hole under the action of magnetic force. The bottle mouth combined valve provided by the present invention integrally installs the first valve body and the second valve body through the housing, adopts a highly integrated design to avoid using multiple independent valves and reduce the leakage points of the vehicle-mounted hydrogen system; the second valve body consists of two parts, namely a pilot valve and a main valve, and the opening of its main valve does not depend on the pressure difference force between the upstream and downstream of the main valve, so the solenoid valve has no minimum working pressure requirement and can be opened at zero air pressure, avoiding excessive residual hydrogen in the gas cylinder and ensuring complete gas supply.

[0017] Further, the present invention also provides a vehicle-mounted hydrogen supply system. Since it includes the bottle mouth combined valve in the above-mentioned embodiment of the present invention, it has the same advantages as above.

[0018] Furthermore, the present invention also provides a vehicle-mounted hydrogen supply system. Since it includes the bottle mouth combined valve or the hydrogen storage cylinder group in the above-mentioned embodiment of the present invention, it has the same advantages as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of the bottle mouth combined valve provided in one embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the principle of the bottle mouth combined valve provided in one embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the internal structure of the first valve body provided in one embodiment of the present invention.

[0023] Figure 4 It is a top view of the first valve body provided in one embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the second valve body provided in one embodiment of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the main valve provided in one of the embodiments of the present invention.

[0026] Figure 7 It is a schematic internal structure diagram of the manual stop valve or the relief valve provided in one of the embodiments of the present invention.

[0027] Figure 8 It is a schematic internal structure diagram of the filling valve provided in one of the embodiments of the present invention.

[0028] Figure 9 It is a schematic overall structure diagram of the hydrogen storage bottle group provided in one of the embodiments of the present invention.

[0029] Figure 10 It is a schematic diagram of the principle of the on-vehicle hydrogen supply system provided in one of the embodiments of the present invention.

[0030] Reference numerals: 001: Connector; 002: TPRD discharge port; 003: Hydrogen filling port; 004: Shunt; 005: First pressure sensor; 006: Pressure reducing valve; 007: Safety valve; 008: Relief valve; 009: Second pressure sensor; 010: Bottle neck combination valve; 014: Hydrogen storage bottle; 100: First valve body; 011: Filling channel; 012: Gas supply channel; 013: Discharge channel; 200: TPRD module; 300: Second valve body; 400: Overflow protection valve; 500: Gas supply valve; 600: Temperature sensor; 700: Manual stop valve; 800: Relief valve; 900: Filling valve; 1000: Filling filter; 1100: Gas supply filter; 301: Solenoid valve sleeve; 302: First magnetic part; 303: Second magnetic part; 304: Main valve; 305: Block; 306: Pilot valve core; 307: Locking nut; 308: Elastic part; 309: Electromagnetic coil; 310: Second seal; 311: First seal; 312: Pilot hole; 701: Valve cover; 704: Valve core; 705: First valve; 708: Rotating valve stem; 902: Second valve; 903: First valve seat; 904: Second valve seat; 905: Gland; 906: Elastic body. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without any creative work shall fall within the protection scope of the present invention.

[0032] In the description of the present embodiment, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present embodiment 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 thus should not be construed as limiting the present embodiment.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present embodiment, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In the present embodiment, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present embodiment can be understood according to specific circumstances.

[0035] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0036] The following will combine Figures 1-8 to describe a bottle mouth combined valve of the present invention. The bottle mouth combined valve includes: a housing, a first valve body 100, a filling valve 900, a second valve body 300, and a TPRD module 200.

[0037] Among them, the first valve body 100 is installed on the housing; it includes: a filling channel 011, a gas supply channel 012, and a relief channel 013.

[0038] The filling channel 011 communicates with a hydrogen storage cylinder 014; the gas supply channel 012 communicates with the hydrogen storage cylinder 014; the relief channel 013 communicates with the hydrogen storage cylinder 014; the filling valve 900 is installed on the housing and disposed in the filling channel 011; the second valve body 300 is installed on the housing and disposed in the gas supply channel 012; the TPRD module 200 is installed on the housing and disposed in the relief channel 013.

[0039] The second valve body 300, which is installed on the housing and disposed in the gas supply channel 012, includes: a pilot valve and a main valve. The pilot valve internally has a first magnetic member 302 and a second magnetic member 303: the main valve internally has a main valve element 304 movably arranged, and a pilot hole 312 is formed on the main valve element 304, and the first magnetic member 302 and the second magnetic member 303 control the opening and closing of the pilot hole 312 under the action of magnetic force.

[0040] Specifically, the bottle mouth combined valve has a housing, which is used to install and support various parts of the structure, and integrates and installs structures such as the first valve body 100, the filling valve 900, the second valve body 300, the TPRD module 200, and a temperature sensor 600 (the temperature sensor 600 is used to monitor the temperature change in the gas cylinder in real time) through the housing. The bottle mouth combined valve provided by the present invention integrates and installs various parts of the structure through the housing, has a high product integration degree, realizes functions such as one-way filling, cut-off, over-current protection, and safety relief of hydrogen, reduces the leakage points of the hydrogen supply system, and improves safety and reliability.

[0041] Specifically, the filling channel 011 is communicated with the inlet and outlet joint at the end of the housing, and is used for filling hydrogen into the hydrogen storage cylinder 014 for internal storage; the gas supply channel 012 is also communicated with the inlet and outlet joint at the end of the housing, and is used for supplying the hydrogen inside the hydrogen storage cylinder 014 to the fuel cell system for use; the relief channel 013 is communicated with the discharge pipeline, and is used for discharging gas to ensure that the internal pressure of the hydrogen storage cylinder 014 is within a safe range.

[0042] Specifically, the filling valve 900 is arranged at one end of the filling channel 011 close to the hydrogen storage cylinder 014, and a one-way filling valve can be adopted, which can ensure one-way filling of hydrogen and avoid leakage. When hydrogen filling is required, the filling valve 900 is opened to fill hydrogen into the hydrogen storage cylinder 014; when the filling needs to be stopped, the filling valve 900 is closed.

[0043] Specifically, the TPRD module (English full name: Thermal Pressure Relief Device; Chinese full name: thermal pressure relief device or simply pressure relief device) includes a sensitive element that can respond to changes in temperature and / or pressure; once a preset safety threshold is reached, this element will be triggered to open a channel for the gas to escape from the storage tank. The TPRD module 200 is arranged in the relief channel 013 to relieve hydrogen pressure in a high-temperature environment and prevent the high-pressure hydrogen in the hydrogen storage bottle from exploding in case of a fire.

[0044] The second valve body 300 is a high-pressure solenoid valve, which is composed of a pilot valve and a main valve. There are two magnetic parts inside the pilot valve, and the first magnetic part 302 and the second magnetic part 303 are driven to move by applying an external magnetic field. There is a main valve flap 304 movably arranged inside the main valve, and a pilot hole 312 is formed inside it. The opening and closing of the pilot hole 312 can be realized by the movement of the first magnetic part 302 and the second magnetic part 303.

[0045] The characteristics of the pilot valve are as follows: The working principle of the pilot valve is based on the basic principles of fluid mechanics. When a small energy input is applied to the pilot valve, it can generate enough force to move the components inside the main valve, allowing a larger fluid volume to pass through the main valve. This enables even very small control signals to precisely manage a large amount of fluid flow. In the present invention, the opening and closing of the pilot valve are controlled by a magnetic field, and the generation and disappearance of this magnetic field can be controlled by the control signal of the hydrogen storage system ECU.

[0046] A bottle mouth combined valve provided by the present invention comprises: a housing, a first valve body and a second valve body; the first valve body is installed on the housing, and the first valve body comprises: a gas supply channel which is communicated with a hydrogen storage cylinder; the second valve body is installed on the housing and arranged in the gas supply channel, and the second valve body comprises: a pilot valve and a main valve; the inside of the pilot valve has a first magnetic member 302 and a second magnetic member 303: the inside of the main valve has a main valve flap 304 movably arranged, a pilot hole 312 is formed on the main valve flap 304, and the first magnetic member 302 and the second magnetic member 303 control the opening and closing of the pilot hole 312 under the action of magnetic force. The bottle mouth combined valve provided by the present invention integrally installs the first valve body and the second valve body through the housing, adopts a highly integrated design to avoid using multiple independent valves and reduce the leakage points of the vehicle-mounted hydrogen system; the second valve body consists of two parts, namely a pilot valve and a main valve, and the opening of its main valve does not depend on the pressure difference force between the upstream and downstream of the main valve, so the solenoid valve has no minimum working pressure requirement and can be opened at zero air pressure, avoiding excessive hydrogen remaining in the gas cylinder and ensuring complete gas supply.

[0047] In one embodiment of the present invention, the pilot valve further comprises: an elastic member 308 and a pilot valve core 306. Wherein, the elastic member 308 is arranged between the first magnetic member 302 and the second magnetic member 303; the pilot valve core 306 is arranged at one end of the elastic member 308 close to the pilot hole 312. When the first magnetic member 302 and the second magnetic member 303 overcome the elastic force of the elastic member 308 and the pressure difference at both ends of the pilot hole 312 under the action of magnetic force, the pilot valve core 306 is driven to move so as to open the pilot hole 312. Specifically, the elastic member 308 can adopt a spring, and the spring is connected between the first magnetic member 302 and the second magnetic member 303, mainly providing an elastic restoring force for the pilot valve core 306. When an external magnetic field makes an electromagnetic force formed between the first magnetic member 302 and the second magnetic member 303 and overcomes the elastic force of the spring and the pressure difference at both ends of the pilot hole 312, the pilot valve core 306 is driven to move during its movement process, so as to control the opening and closing of the pilot hole 312. When the magnetic field is removed, due to the elastic restoring force of the elastic member 308, the pilot valve core 306 moves in the reverse direction and closes the pilot hole 312.

[0048] In one embodiment of the present invention, the pilot valve further comprises: an electromagnetic coil 309 which is wound around the outside of the first magnetic member 302 and the second magnetic member 303. When the electromagnetic coil 309 is electrified, a magnetic field is generated, and the first magnetic member 302 and the second magnetic member 303 generate an electromagnetic force of mutual attraction under the action of the magnetic field to overcome the elastic force of the elastic member 308 and the pressure difference at both ends of the pilot hole 312, and drive the pilot valve core 306 to move so as to open the pilot hole 312; when the electromagnetic coil 309 is powered off, the first magnetic member 302 and the second magnetic member 303 drive the pilot valve core 306 to move under the action of the elastic force of the elastic member 308 so as to close the pilot hole 312.

[0049] In the above embodiment, the first magnetic member 302 includes: a stop iron; the second magnetic member 303 includes: an armature. As Figure 5 shown in the structure, when the electromagnetic coil 309 is energized, the first magnetic member 302 remains stationary, and the second magnetic member 303 moves upward due to the electromagnetic force, overcoming the elastic force of the elastic member 308 and the pressure difference at both ends of the pilot hole 312, thereby driving the pilot spool 306 to move upward. The pilot spool 306 opens the pilot hole 312, and the gas on the upper side of the main valve 304 is quickly discharged to the downstream of the main valve through the pilot hole 312. When the pressure downstream of the main valve is balanced with the pressure upstream of the main valve, the main valve 304 can continue to move upward under the action of the electromagnetic force, the main valve opens, the air supply channel is connected, and air is supplied downstream. Both the stop iron and the armature are made of magnetically conductive stainless steel.

[0050] In one embodiment of the present invention, the second magnetic member 303 is disposed between the first magnetic member 302 and the main valve 304, and a through assembly hole is provided in the second magnetic member 303 for accommodating the elastic member 308 and limiting the pilot spool 306. One end of the elastic member 308 passes through the assembly hole and contacts the first magnetic member 302, and the other end of the elastic member 308 is connected to one end of the pilot spool 306. The other end of the pilot spool 306 can open or close the pilot hole 312 under the drive of the second magnetic member 303. In this embodiment, the first magnetic member 302, the second magnetic member 303, and the main valve 304 are arranged in sequence from top to bottom. An assembly hole is machined inside the second magnetic member 303, the elastic member 308 is inserted into the assembly hole, and its upper end contacts the first magnetic member 302 above it, and its lower end is connected to the pilot spool 306. The lower surface of the pilot spool 306 can be flush with the bottom surface of the second magnetic member 303. Specifically, the part of the assembly hole close to the first magnetic member 302 is a cylindrical hole, and the part close to the main valve 304 is a trapezoidal hole. The cylindrical hole is used to accommodate the elastic member 308, and the trapezoidal hole is used to limit the lower limit position of the pilot spool 306, so that the second magnetic member 303 can drive the pilot spool 306 to move upward under the action of the trapezoidal hole.

[0051] In one embodiment of the present invention, a wedge-shaped groove structure is formed at one end of the first magnetic member 302 close to the second magnetic member 303, and a wedge-shaped protrusion structure is formed at one end of the second magnetic member 303 close to the first magnetic member 302; or a wedge-shaped protrusion structure is formed at one end of the first magnetic member 302 close to the second magnetic member 303, and a wedge-shaped groove structure is formed at one end of the second magnetic member 303 close to the first magnetic member 302. Wherein, the wedge-shaped protrusion is adapted to be embedded in the wedge-shaped groove structure. Specifically, the first magnetic member 302 and the second magnetic member 303 are matched through the wedge-shaped groove structure and the wedge-shaped protrusion, and due to the assembly hole structure inside the second magnetic member 303, the dimensions of the two magnetic members in the radial direction and the length direction can be reduced. Under the condition of generating the same electromagnetic force, the weight and power consumption of the coil are reduced. In addition, the cooperation form of the two magnetic members with wedge-shaped surfaces is adopted to replace the flat suction surface in the prior art. Under the condition of generating the same electromagnetic force, the coil in this embodiment requires a smaller ampere-turn number, reducing the weight and power consumption of the coil.

[0052] In one embodiment of the present invention, the second magnetic member 303 is arranged between the first magnetic member 302 and the main valve 304, and the bottle mouth combination valve further includes: a stopper 305 arranged on the second magnetic member 303 for limiting the main valve 304. In the structure as Figure 5 shown, the stopper 305 is used to limit the lower limit position of the main valve 304. In one embodiment of the present invention, the bottle mouth combination valve further includes: a solenoid valve sleeve 301, a first seal 311 and a second seal 310. Wherein, the solenoid valve sleeve 301 is sleeved outside the first magnetic member 302 and the second magnetic member 303; the first seal 311 is arranged outside the solenoid valve sleeve 301; the second seal 310 is arranged outside the first magnetic member 302. Specifically, the solenoid valve sleeve 301 is hermetically connected to the housing through the first seal 311, and the first magnetic member 302 is hermetically connected to the solenoid valve sleeve 301 through the second seal 310 to achieve a sealing effect. The upper end of the housing is fixed by a lock nut 307.

[0053] In one embodiment of the present invention, as Figure 6 shown, the main valve 304 adopts a spherical self-centering structure, and the material is selected from engineering plastics such as polyether ether ketone or polyimide to meet the sealing requirements of 70 MPa for vehicles.

[0054] In one embodiment of the present invention, the bottle neck combined valve further includes: a manual shut-off valve 700, a filling filter 1000, and a connector 001. The manual shut-off valve 700 is arranged in the filling passage 011; the filling filter 1000 is arranged in the filling passage 011; the connector 001 is arranged at one end of the filling passage 011 away from the hydrogen storage cylinder 014. Among them, the filling valve 900 is sequentially connected to the manual shut-off valve 700, the filling filter 1000, and the connector 001 through the filling passage 011.

[0055] In the above embodiment, the connector 001 can realize the functions of inlet or outlet under different working conditions. During the filling process, air enters through the connector 001; during the gas supply process, gas is supplied to the fuel cell system through the connector 001. The handle of the manual shut-off valve 700 is installed outside the housing, which is convenient for manual operation by personnel. The manual shut-off of hydrogen filling in the filling passage 011 can be realized by operating the manual shut-off valve 700; the filled hydrogen is filtered by the filling filter 1000 to ensure the cleanliness of the filled hydrogen.

[0056] In one embodiment of the present invention, the bottle neck combined valve further includes: a gas supply valve 500, an overcurrent protection valve 400, and a gas supply filter 1100. Among them, the gas supply valve 500 is arranged in the gas supply passage 012; the overcurrent protection valve 400 is arranged in the gas supply passage 012; the gas supply filter 1100 is arranged in the gas supply passage 012. Among them, the second valve body 300 is sequentially connected to the gas supply valve 500, the overcurrent protection valve 400, and the gas supply filter 1100 through the gas supply passage 012.

[0057] In the above embodiment, the second valve body 300 adopts a high-pressure solenoid valve, and its opening and closing are controlled by the vehicle-mounted ECU. The gas supply valve 500 adopts a gas supply check valve to ensure one-way gas supply of hydrogen. The overcurrent protection valve 400 is composed of an overcurrent valve flap and an overcurrent valve spring; when the downstream pipeline of the bottle neck combined valve ruptures and the flow rate increases abnormally, the overcurrent valve flap closes under the action of the pressure difference force to realize current limiting and avoid abnormal discharge. The gas supply filter 1100 filters hydrogen during the gas supply process to ensure the cleanliness of the supplied hydrogen.

[0058] In one embodiment of the present invention, a TPRD discharge port 002 is formed at the first end of the relief passage 013. The second end of the relief passage 013 communicates with the hydrogen storage cylinder 014, and the third end of the relief passage 013 is connected to the filling filter 1000. In this embodiment, when the external ambient temperature reaches the threshold value, the TPRD module opens the TPRD discharge port 002 at one end of the relief passage 013, and the high-pressure hydrogen is relieved through the TPRD discharge port 002. On the other hand, the second end of the relief passage 013 communicates with the inside of the hydrogen storage cylinder 014, and the third end of the relief passage 013 is connected to the filling filter 1000. When the internal pressure of the hydrogen storage cylinder 014 is too high, the high-pressure hydrogen can be discharged from the joint 001 through the relief passage along the filling filter 1000. It can be seen that through the above arrangement in this embodiment, pressure relief can be achieved in a high-temperature environment and also when the internal pressure of the hydrogen storage cylinder 014 is high, thereby ensuring the safety of hydrogen storage.

[0059] In one embodiment of the present invention, the bottle neck combination valve further includes: a relief valve 800, which is arranged in the relief passage 013 and is located between the second end of the relief passage 013 and the filling filter 1000. In this embodiment, by providing a relief valve 800 between the hydrogen storage cylinder 014 and the joint, when pressure relief is required, the relief valve 800 is opened, and the high-pressure hydrogen in the hydrogen storage cylinder 014 is discharged through the joint to achieve pressure relief.

[0060] In one embodiment of the present invention, both the manual shut-off valve 700 and the relief valve 800 include: a valve cover 701, a valve core 704, a first valve 705, and a rotating valve stem 708. Specifically, the valve core 704 is movably arranged in the valve cover 701; the first valve 705 is movably arranged in the valve cover 701; the rotating valve stem 708 is movably arranged on the valve cover 701 and is connected to the valve core 704 and the first valve 705. In this embodiment, the manual shut-off valve 700 and the relief valve 800 adopt the same structure, and the rotating valve stem 708 among them is installed outside the housing for manual operation. By operating the rotating valve stem 708, the valve core 704 is actuated to open or close the valve body.

[0061] In addition, both the above-mentioned manual shut-off valve 700 and the relief valve 800 are of unloading type structures, with smaller opening and closing torques and high service life; the valve core 704 is of ball head structure and has self-adaptability; the first valve 705 is made of PEEK or PI material, and the first valve 705 and the valve body are of soft and hard seals, which can achieve good sealing performance under a smaller tightening torque. The manual shut-off valve 700 and the relief valve 800 are also configured with structures such as friction rings, sealing rings, and retaining rings.

[0062] In one embodiment of the present invention, the filling valve 900 includes: a body, a second valve 902, a first-stage valve seat 903, and a second-stage valve seat 904. Among them, the second valve 902 is movably arranged inside the body; the first-stage valve seat 903 is fixed inside the body; the second-stage valve seat 904 is fixed inside the body. Among them, when the hydrogen pressure inside the filling valve 900 is less than the preset pressure threshold, the second valve 902 and the first-stage valve seat 903 are in sealing contact; when the hydrogen pressure inside the filling valve 900 is equal to or greater than the preset pressure threshold, the second valve 902 and the second-stage valve seat 904 are in sealing contact.

[0063] In the above embodiment, a two-stage sealing structure is adopted, that is, when the filling valve 900 is subjected to hydrogen pressure, when in a low-pressure working condition below 2 MPa, the second valve 902 and the first-stage valve seat 903 are in contact to achieve sealing; when in a working condition above 2 MPa, the second valve 902 and the second-stage valve seat 904 are in contact to achieve sealing, so as to ensure reliable one-way sealing of the filling check valve within a pressure range of 0.5 to 70 MPa.

[0064] In one embodiment of the present invention, the filling valve 900 further includes: a gland 905 and an elastomer 906. Specifically, the gland 905 is fixed inside the body, and presses and fixes the first-stage valve seat 903 and the second-stage valve seat 904 inside the body; one end of the elastomer 906 is connected inside the body, and the other end is connected to the second valve 902. Specifically, in the filling valve 900, the first-stage valve seat 903 and the second-stage valve seat 904 are pressed by the gland 905 to fix the two valve seats inside the body, which has the functions of support and fixation. The elastic force provided by the elastomer 906 serves as the closing force of the valve, thereby realizing the check function of the filling valve.

[0065] In one embodiment of the present invention, both the above-mentioned filling filter 1000 and the gas supply filter 1100 adopt a replaceable filter element design. The filter element of the filter adopts a three-layer stainless steel sintered filter screen and is supported by a porous stainless steel bracket to improve the pressure shock resistance of the filter element; at the same time, the filter element and the bracket are designed separately to facilitate the replacement and maintenance of the filter element.

[0066] For the bottle mouth combination valve according to the above embodiment, the working state of the second valve body 300 is as follows: Opening process: a. The pilot valve opens: After the electromagnetic coil 309 is energized, a magnetic field is generated. In the magnetic field, the armature and the keeper generate an electromagnetic force of mutual attraction. Under the action of the electromagnetic force, the armature drives the pilot valve core 306 to move upward together, overcoming the differential pressure force at both ends of the pilot hole 312 and the action of the spring, and the pilot valve opens.

[0067] b. Main valve opening: After the pilot valve opens, the gas on the upper side of the main valve flap 304 is quickly discharged to the downstream of the main valve through the pilot hole 312. When the pressure downstream of the main valve is balanced with the pressure upstream of the main valve, the main valve flap 304 continues to move upward under the action of electromagnetic force, and the main valve opens.

[0068] Closing process: When the hydrogen storage system ECU sends a solenoid valve closing instruction, the internal magnetic field of the electromagnetic coil 309 disappears, the electromagnetic force on the armature disappears, and the armature moves downward under the action of the spring, the pilot valve closes, the main valve contacts the valve seat, and sealing is achieved under the action of the differential pressure force and the spring force.

[0069] As Figure 9 shown, the present invention also provides a hydrogen storage cylinder group. The hydrogen storage cylinder group includes: the bottle mouth combined valve 010 and the hydrogen storage cylinder 014 in the above-mentioned embodiments of the present invention.

[0070] Specifically, the bottle mouth combined valve 010 is arranged at the bottle mouth of the hydrogen storage cylinder 014 and is used to realize functions such as hydrogen filling, gas supply and pressure relief.

[0071] As Figure 10 shown, the present invention also provides a vehicle-mounted hydrogen supply system. Since it includes the bottle mouth combined valve in the above-mentioned embodiments of the present invention, it has the same advantages as above.

[0072] The present invention also provides a vehicle-mounted hydrogen supply system. The vehicle-mounted hydrogen supply system includes: the bottle mouth combined valve 010 in the above-mentioned embodiments of the present invention, or, the hydrogen storage cylinder group in the above-mentioned embodiments of the present invention.

[0073] The present invention also provides a vehicle-mounted hydrogen supply system. Since it includes the bottle mouth combined valve or the hydrogen storage cylinder group in the above-mentioned embodiments of the present invention, it has the same advantages as above.

[0074] In one embodiment of the present invention, the vehicle-mounted hydrogen supply system further includes: a hydrogen filling port 003, a diverter 004, a first pressure sensor 005, a pressure reducing valve 006, a safety valve 007, a pressure relief valve 008, a second pressure sensor 009 and a controller. Among them, the diverter 004 is arranged downstream of the hydrogen filling port 003 and is communicated with the bottle mouth combined valve 010; the first pressure sensor 005 is arranged on the diverter 004; the pressure reducing valve 006 is connected downstream of the diverter 004; the safety valve 007 is connected downstream of the diverter 004; the pressure relief valve 008 is connected downstream of the diverter 004; the second pressure sensor 009 is connected downstream of the diverter 004; the controller is in signal connection with the first pressure sensor 005 and the second pressure sensor 009.

[0075] In the above embodiments, a pressure reducing valve 006, a safety valve 007 and a pressure relief valve 008 are sequentially connected to a branch downstream of the flow divider 004. The hydrogen filling port 003 can provide hydrogen filling for a plurality of bottle mouth combination valves 010 through the flow divider 004. The first pressure sensor 005 is a high-pressure pressure sensor, the second pressure sensor 009 is a low-pressure pressure sensor, and the pressure relief valve 008 is a low-pressure relief valve.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A combined valve for the bottle mouth, characterized in that, Comprising: A housing; A first valve body (100), mounted on the housing, the first valve body (100) comprising: A gas supply passage (012), communicating with a hydrogen storage cylinder (014); A second valve body (300), mounted on the housing and disposed in the gas supply passage (012), the second valve body comprising: A pilot valve, having a first magnetic member (302) and a second magnetic member (303) therein: A main valve, having a main valve element (304) movably disposed therein, a pilot hole (312) formed on the main valve element (304), and the first magnetic member (302) and the second magnetic member (303) controlling the opening and closing of the pilot hole (312) under the action of magnetic force.

2. The bottle mouth combined valve according to claim 1, characterized in that, The pilot valve further comprises: An elastic member (308), disposed between the first magnetic member (302) and the second magnetic member (303); A pilot valve core (306), disposed at one end of the elastic member (308) close to the pilot hole (312). When the first magnetic member (302) and the second magnetic member (303) overcome the elastic force of the elastic member (308) and the pressure difference across the pilot hole (312) under the action of magnetic force, the pilot valve core (306) is driven to move, so as to open the pilot hole (312).

3. The bottle mouth combined valve according to claim 2, characterized in that, The pilot valve further comprises: An electromagnetic coil (309), wound around the outside of the first magnetic member (302) and the second magnetic member (303); When the electromagnetic coil (309) is energized to generate a magnetic field, the first magnetic member (302) and the second magnetic member (303) generate an electromagnetic force of mutual attraction under the action of the magnetic field, so as to overcome the elastic force of the elastic member (308) and the pressure difference across the pilot hole (312), and drive the pilot valve core (306) to move, so as to open the pilot hole (312); When the electromagnetic coil (309) is de-energized, the first magnetic member (302) and the second magnetic member (303) drive the pilot valve core (306) to move under the elastic force of the elastic member (308), so as to close the pilot hole (312).

4. The bottle mouth combined valve according to claim 2, characterized in that, The second magnetic member (303) is disposed between the first magnetic member (302) and the main valve element (304), and a through assembly hole is provided in the second magnetic member (303), and the assembly hole is used to accommodate the elastic member (308) and limit the pilot valve core (306); Wherein, one end of the elastic member (308) passes through the assembly hole and contacts the first magnetic member (302), the other end of the elastic member (308) is connected to one end of the pilot valve core (306), and the other end of the pilot valve core (306) can open or close the pilot hole (312) under the drive of the second magnetic member (303).

5. The bottle mouth combined valve according to claim 1, characterized in that, A wedge-shaped groove structure is formed at one end of the first magnetic member (302) close to the second magnetic member (303), and a wedge-shaped protrusion structure is formed at one end of the second magnetic member (303) close to the first magnetic member (302), or; a wedge-shaped protrusion structure is formed at one end of the first magnetic member (302) close to the second magnetic member (303), and a wedge-shaped groove structure is formed at one end of the second magnetic member (303) close to the first magnetic member (302); Wherein, the wedge-shaped protrusion is adapted to be embedded in the wedge-shaped groove structure.

6. The bottle mouth combined valve according to claim 1, characterized in that, The second magnetic member (303) is disposed between the first magnetic member (302) and the main valve (304), and the bottle mouth combined valve further includes: A stopper (305) disposed on the second magnetic member (303) for limiting the main valve (304).

7. The bottle mouth combined valve according to claim 1, characterized in that, It further includes: An electromagnetic valve sleeve (301) sleeved outside the first magnetic member (302) and the second magnetic member (303); A first seal (311) disposed outside the electromagnetic valve sleeve (301); A second seal (310) disposed outside the first magnetic member (302).

8. The bottle mouth combined valve according to any one of claims 1 to 7, characterized in that The first magnetic member (302) includes: A keeper; The second magnetic member (303) includes: An armature.

9. A hydrogen storage cylinder group, characterized in that, It includes: The bottle mouth combined valve (010) according to any one of claims 1 to 8; A hydrogen storage cylinder (014), and the bottle mouth combined valve (010) is disposed at the bottle mouth of the hydrogen storage cylinder (014).

10. A vehicle-mounted hydrogen supply system, characterized in that, It includes: The bottle mouth combined valve (010) according to any one of claims 1 to 8, or the hydrogen storage cylinder group according to claim 9.

11. The on-vehicle hydrogen supply system according to claim 10, characterized in that, It further includes: A hydrogen filling port (003); A diverter (004) disposed downstream of the hydrogen filling port (003) and communicating with the bottle mouth combined valve (010); A first pressure sensor (005) disposed on the diverter (004); A pressure reducing valve (006) connected downstream of the diverter (004); A safety valve (007) connected downstream of the diverter (004); A pressure relief valve (008) connected downstream of the diverter (004); A second pressure sensor (009) connected downstream of the diverter (004); A controller signal-connected to the first pressure sensor (005) and the second pressure sensor (009).

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