Combination valve, and gas storage cylinder having same

Abstract

Disclosed in the present application are a combination valve (10) and a gas storage cylinder having same. The combination valve (10) comprises a valve body assembly (1), a main valve seat (2) and a control assembly (3), wherein the main valve seat (2) is fixedly arranged in the valve body assembly (1) and jointly defines a mounting cavity (13) with the valve body assembly (1); a medium inlet (11) of the valve body assembly (1) is in communication with the mounting cavity (13); a main flow channel (21) of the main valve seat (2) is adapted to communicate the mounting cavity (13) with the medium outlet (12) of the valve body assembly (1); the control assembly (3) is at least partially arranged in the mounting cavity (13); and the control assembly (3) comprises an actuating portion (31), a main valve core (32) and an auxiliary valve core (33), the main valve core (32) being located between the auxiliary valve core (33) and the main valve seat (2), and the main valve core (32) having a communication flow channel (321) adapted to communicate the main flow channel (21) with the mounting cavity (13).

Description

Combined valve and gas cylinder with same

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202420827911.0, with the title of "Combined valve and gas cylinder with same", filed on April 19, 2024, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of gas cylinders, in particular to a combined valve and a gas cylinder with the same. BACKGROUND

[0004] In a vehicle-mounted hydrogen storage system, a control valve is arranged between a gas cylinder and a fuel cell stack to control the opening and closing of a gas path. When the control valve is switched from a closed state to an open state, the valve core of the control valve needs to overcome the resistance formed by the pressure difference on both sides of the control valve, resulting in a large driving force required for opening the control valve and a slow opening speed. SUMMARY

[0005] The present application aims to at least partially solve one of the above technical problems in the prior art. To this end, the present application proposes a combined valve, which can realize fast opening of the combined valve.

[0006] The present application also proposes a gas cylinder with the above combined valve.

[0007] According to the combined valve of the present application, the combined valve comprises a valve body assembly, a main valve seat and a control assembly. The valve body assembly has a medium inlet and a medium outlet. The main valve seat is fixedly arranged in the valve body assembly, and the main valve seat and the valve body assembly jointly define an installation cavity. The medium inlet is in communication with the installation cavity. The main valve seat has a main flow passage adapted to communicate the installation cavity and the medium outlet. The control assembly is at least partially arranged in the installation cavity. The control assembly comprises an actuating part, a main valve core and a secondary valve core. The main valve core is located between the secondary valve core and the main valve seat. The main valve core has a communication flow passage adapted to communicate the main flow passage and the installation cavity. The combined valve has an open state and a closed state. When the combined valve is switched from the open state to the closed state, the actuating part drives the secondary valve core to move towards the main valve seat, so that the secondary valve core abuts against the main valve core and blocks the communication flow passage, and the main valve core abuts against the main valve seat and blocks the main flow passage. When the combined valve is switched from the closed state to the open state, the actuating part drives the secondary valve core and the main valve core to move away from the main valve seat in sequence, so that the separation of the secondary valve core and the main valve core precedes the separation of the main valve core and the main valve seat.

[0008] According to the combined valve of the embodiments of the present application, the combined valve has an open state and a closed state, when the combined valve is switched from the closed state to the open state, the actuating part drives the secondary spool and the primary spool to move in sequence, so that the separation of the secondary spool from the primary spool is prior to the separation of the primary spool from the primary valve seat, thereby the communication flow passage and the main flow passage are opened in sequence, the pressure balance at both ends of the primary spool can be achieved after the communication flow passage is opened, so as to reduce the driving force required for the movement of the primary spool, facilitate the movement of the primary spool driven by the braking part, and quickly separate the primary spool from the primary valve seat, thereby achieving the quick opening of the combined valve.

[0009] According to some embodiments of the present application, the secondary spool has a sealing spherical surface, and the primary spool is formed with a sealing conical surface at the inlet of the communication flow passage, and the sealing conical surface is tangent to the sealing spherical surface when the secondary spool abuts against the primary spool.

[0010] According to some embodiments of the present application, the primary spool comprises a spool main body part and a sealing part, the sealing part is detachably installed on the spool main body part, the spool main body part is used for opening and closing the main flow passage, and the sealing part has the sealing conical surface.

[0011] According to some embodiments of the present application, the hardness of the secondary spool is greater than the hardness of the sealing part.

[0012] According to some embodiments of the present application, the secondary spool is a steel part, and the sealing part is a plastic part.

[0013] According to some embodiments of the present application, the actuating part comprises a coil, an elastic part and a moving armature, the primary spool and the secondary spool are both installed on the moving armature, the elastic part is adapted to drive the secondary spool to move towards the primary valve seat, and the coil is adapted to drive the moving armature to move away from the primary valve seat, so that the moving armature drives the secondary spool and the primary spool to move away from the primary valve seat in sequence.

[0014] According to some embodiments of the present application, the moving armature has a first sub-installation cavity in communication with the installation cavity, and part of the primary spool is arranged in the first sub-installation cavity, and the primary spool is movable relative to the moving armature within a preset range in the moving direction of the moving armature.

[0015] According to some embodiments of the present application, the actuating part further comprises a fixed armature, the fixed armature is fixedly connected with the inner wall of the installation cavity, and the fixed armature is located on the side of the moving armature away from the primary valve seat.

[0016] According to some embodiments of the present application, the moving armature has a second sub-installation cavity in communication with the installation cavity, and part of the secondary spool is arranged in the second sub-installation cavity, and the elastic part abuts between the fixed armature and the secondary spool.

[0017] According to another aspect of the embodiments of the present application, the gas cylinder comprises the combined valve as described above.

[0018] The gas cylinder has the same advantages as the combined valve as described above relative to the prior art, which will not be repeated here.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a sectional view of a combined valve and a one-way valve according to an embodiment of the present application;

[0021] Fig. 2 is a schematic view of a moving armature, a main valve core, a secondary valve core, a limiting block and a resilient member according to an embodiment of the present application;

[0022] Fig. 3 is an enlarged view of Fig. 2 at A;

[0023] Fig. 4 is a perspective view of a sealing part according to an embodiment of the present application.

[0024] Reference signs: valve body assembly 1; medium inlet 11; medium outlet 12; mounting cavity 13; main valve seat 2; main flow passage 21; control assembly 3; actuating part 31; coil 311; resilient member 312; moving armature 313; first sub-mounting cavity 3131; second sub-mounting cavity 3132; limiting block 314; fixed armature 315; main valve core 32; communication flow passage 321; sealing cone surface 322; valve core main body part 323; sealing part 324; secondary valve core 33; sealing spherical surface 331; sealing ring 4; check ring 5; combined valve 10; one-way valve 20. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and are not to be construed as limiting the present application.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0027] In addition, the terms "first", "second", "third", etc. are used herein only to describe different instances, and are not used to indicate or imply relative importance or a number of indicated technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0028] In the present application, unless otherwise explicitly and specifically defined, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can be in communication with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] The combination valve 10 and the gas cylinder with it according to the embodiments of the present application will be described in detail below in combination with FIGS. 1-4.

[0030] Referring to FIGS. 1-3, the combination valve 10 according to the embodiments of the present application comprises a valve body assembly 1, a main valve seat 2 and a control assembly 3, the valve body assembly 1 has a medium inlet 11 and a medium outlet 12, the main valve seat 2 is fixedly arranged in the valve body assembly 1, the main valve seat 2 and the valve body assembly 1 together define a mounting cavity 13, the medium inlet 11 is in communication with the mounting cavity 13, the main valve seat 2 has a main flow passage 21, the main flow passage 21 is adapted to communicate the mounting cavity 13 and the medium outlet 12, the control assembly 3 is at least partially arranged in the mounting cavity 13, the control assembly 3 comprises an actuating part 31, a main valve core 32 and a secondary valve core 33, the main valve core 32 is located between the secondary valve core 33 and the main valve seat 2, the main valve core 32 has a communicating flow passage 321 adapted to communicate the main flow passage 21 and the mounting cavity 13.

[0031] The combination valve 10 has an open state and a closed state, when the combination valve 10 is switched from the open state to the closed state, the actuating part 31 drives the secondary valve core 33 to move towards the main valve seat 2, so that the secondary valve core 33 abuts against the main valve core 32 and blocks the communicating flow passage 321, and the main valve core 32 abuts against the main valve seat 2 and blocks the main flow passage 21, thereby the secondary valve core 33 closes the communicating flow passage 321 and the main valve core 32 closes the main flow passage 21, when the combination valve 10 is switched from the closed state to the open state, the actuating part 31 drives the secondary valve core 33 and the main valve core 32 to move away from the main valve seat 2 in sequence, so that the separation of the secondary valve core 33 and the main valve core 32 precedes the separation of the main valve core 32 and the main valve seat 2, thereby the communicating flow passage 321 and the main flow passage 21 are opened in sequence, the actuating part 31 drives the secondary valve core 33 and the main valve core 32 to move in sequence, which can realize the rapid opening of the combination valve 10.

[0032] It can be understood that, in use, the medium inlet 11 is the high-pressure side and the medium outlet 12 is the low-pressure side, and when the combination valve 10 is in the closed state, the secondary spool 33 abuts against the primary spool 32 and closes the communication flow passage 321, and the primary spool 32 abuts against the primary valve seat 2 and closes the main flow passage 21, so that the installation cavity 13 is not communicated with the medium outlet 12, that is, the medium flowing into the installation cavity 13 from the medium inlet 11 cannot flow to the medium outlet 12 through the communication flow passage 321 and the main flow passage 21, so as to realize the closing function of the combination valve 10.

[0033] When the combination valve 10 is in the open state, the secondary spool 33 is separated from the primary spool 32 and the communication flow passage 321 is opened, and the primary spool 32 is separated from the primary valve seat 2 and the main flow passage 21 is opened, so that the installation cavity 13 is communicated with the medium outlet 12 through the communication flow passage 321 and the main flow passage 21, that is, the medium flowing into the installation cavity 13 from the medium inlet 11 can flow to the medium outlet 12 through the communication flow passage 321 and the main flow passage 21, so as to realize the opening function of the combination valve 10.

[0034] When the combination valve 10 is switched from the closed state to the open state, the actuating part 31 can first drive the secondary spool 33 to move away from the primary valve seat 2, the secondary spool 33 can be separated from the primary spool 32, the communication flow passage 321 is opened, the installation cavity 13 is communicated with the medium outlet 12 through the communication flow passage 321 and the main flow passage 21, and the medium can flow to the medium outlet 12 through the medium inlet 11, the installation cavity 13 and the communication flow passage 321 and the main flow passage 21 in sequence, so as to unload the pressure at the upper end of the primary spool 32 in the moving direction of the primary spool 32 (up and down in FIG. 1), realize the pilot pressure relief, balance the pressure at both ends of the primary spool 32, and thus facilitate to reduce the driving force required for the movement of the primary spool 32, so as to facilitate the actuating part 31 to drive the primary spool 32 to move away from the primary valve seat 2 quickly, when the pressure at both ends of the primary spool 32 is balanced, the primary spool 32 is moved away from the primary valve seat 2 under the driving of the actuating part 31, so that the primary spool 32 is separated from the primary valve seat 2, the main flow passage 21 is opened, and the medium flowing into the installation cavity 13 from the medium inlet 11 can flow to the medium outlet 12 through the communication flow passage 321 and the main flow passage 21, the actuating part 31 can reduce the driving force required for the movement of the primary spool 32 by driving the secondary spool 33 and the primary spool 32 to move in sequence, which is conducive to realizing the quick opening of the combination valve 10, and at the same time, the driving force required for the movement of the primary spool 32 is small, which is conducive to reducing the size of the actuating part 31 to reduce the driving force, so as to facilitate the miniaturization design of the combination valve 10.

[0035] When the combination valve 10 is switched from the open state to the closed state, the actuating part 31 drives the secondary valve core 33 to move towards the main valve seat 2, the secondary valve core 33 abuts against the primary valve core 32, the communication flow passage 321 is closed, the secondary valve core 33 pushes the primary valve core 32 to move towards the main valve seat 2, so that the primary valve core 32 abuts against the main valve seat 2, the main flow passage 21 is closed, and the combination valve 10 is closed.

[0036] According to the combination valve 10 of the embodiments of the present application, the combination valve 10 has an open state and a closed state, when the combination valve 10 is switched from the closed state to the open state, the actuating part 31 drives the secondary valve core 33 and the primary valve core 32 to move in sequence, so that the separation of the secondary valve core 33 from the primary valve core 32 is prior to the separation of the primary valve core 32 from the main valve seat 2, thereby the communication flow passage 321 and the main flow passage 21 are opened in sequence, the pressure at both ends of the primary valve core 32 can be balanced after the communication flow passage 321 is opened, so as to reduce the driving force required for the movement of the primary valve core 32, facilitate the movement of the primary valve core 32 driven by the actuating part 31, the primary valve core 32 can be quickly separated from the main valve seat 2, and the combination valve 10 is quickly opened.

[0037] In some embodiments of the present application, referring to FIGS. 3 and 4, the secondary valve core 33 has a sealing spherical surface 331, and the primary valve core 32 has a sealing conical surface 322 formed at the inlet of the communication flow passage 321, when the secondary valve core 33 abuts against the primary valve core 32, the sealing conical surface 322 is tangent to the sealing spherical surface 331, and the sealing conical surface 322 and the sealing spherical surface 331 can form a reliable sealing pair, so as to ensure the sealing performance of the connection between the primary valve core 32 and the secondary valve core 33.

[0038] It can be understood that the sealing conical surface 322 is tangent to the sealing spherical surface 331, and the primary valve core 32 and the secondary valve core 33 can form a conical sealing surface with a certain angle, and the sealing surface formed by the primary valve core 32 and the secondary valve core 33 is a spherical surface, due to the geometric shape of the spherical surface, even if the secondary valve core 33 is eccentric or inclined relative to the primary valve core 32, the sealing surface can still automatically adjust and keep the primary valve core 32 and the secondary valve core 33 in good contact, the spherical sealing surface has self-adaptability and fault tolerance, and the influence of the fitting size or coaxiality of the primary valve core 32 and the secondary valve core 33 on the sealing performance of the two can be reduced, and the spherical sealing surface can ensure the sealing performance of the connection between the primary valve core 32 and the secondary valve core 33 under the condition of unstable medium gas flow washing and vibration.

[0039] In some embodiments of the present application, referring to FIGS. 1-4, the primary valve core 32 includes a valve core main body part 323 and a sealing part 324, the sealing part 324 is detachably installed on the valve core main body part 323, so as to facilitate the assembly and maintenance of the sealing part 324, the valve core main body part 323 is used for opening and closing the main flow passage 21, and the sealing part 324 has the sealing conical surface 322.

[0040] In some embodiments of the present application, referring to FIG. 3, the spool body part 323 and the sealing part 324 can jointly define the communication flow passage 321, the spool body part 323 has a mounting groove for mounting the sealing part 324, the sealing part 324 has a first sub-communication flow passage, and the spool body part 323 further has a second sub-communication flow passage in communication with the mounting groove, after the sealing part 324 is mounted in the mounting groove, the first sub-communication flow passage and the second sub-communication flow passage are in communication with each other and constitute the communication flow passage 321.

[0041] In some other embodiments of the present application (not shown in the drawings), the sealing part 324 can separately define the communication flow passage 321, and the spool body part 323 can have a mounting through hole, and the sealing part 324 is mounted in the mounting through hole, and the sealing part 324 has a central through hole to form the communication flow passage 321.

[0042] When the combined valve 10 is switched from the closed state to the open state, the sealing part 324 is separated from the auxiliary spool 33, the communication flow passage 321 is opened, and the sealing cone surface 322 of the sealing part 324 can be a large-angle cone surface greater than 90°, so that the medium in the mounting cavity 13 flows into the communication flow passage 321, the medium discharge speed is fast, the pressure at both ends of the main spool 32 is quickly balanced, thereby facilitating the reduction of the driving force required for the movement of the main spool 32, facilitating the opening of the main flow passage 21 by the spool body part 323, and facilitating the opening of the combined valve 10. When the combined valve 10 is switched from the open state to the closed state, the sealing cone surface 322 of the sealing part 324 is tangent to the sealing spherical surface 331 of the auxiliary spool 33, the communication flow passage 321 is not in communication with the mounting cavity 13, and the auxiliary spool 33 further drives the spool body part 323 to abut against the main valve seat 2 through the sealing part 324, so that the main flow passage 21 is not in communication with the mounting cavity 13, thereby closing the combined valve 10.

[0043] In some embodiments of the present application, the hardness of the auxiliary spool 33 is greater than the hardness of the sealing part 324, so as to improve the sealing reliability of the sealing part 324 of the main spool 32 and the auxiliary spool 33 at the connection.

[0044] It can be understood that when the auxiliary spool 33 abuts against the sealing part 324 of the main spool 32, due to the hardness of the auxiliary spool 33 being greater than the hardness of the sealing part 324, the sealing cone surface 322 can be deformed to adaptively form a surface fit with the sealing spherical surface 331, the sealing cone surface 322 and the sealing spherical surface 331 can maintain good contact sealing, thereby improving the sealing reliability of the sealing cone surface 322 and the sealing spherical surface 331, in addition, when the auxiliary spool 33 and the sealing part 324 slide or rub against each other, the sealing spherical surface 331 can better resist wear and scratches relative to the sealing cone surface 322, thereby facilitating the improvement of the service life of the auxiliary spool 33.

[0045] In some embodiments of the present application, the auxiliary spool 33 is a steel part, and the sealing part 324 is a plastic part. The steel auxiliary spool 33 has high strength and durability, and the plastic sealing part 324 has good sealing performance. The material of the auxiliary spool 33 can be 316L stainless steel, and the material of the sealing part 324 can be PI (Polyimide, polyimide).

[0046] In some embodiments of the present application, referring to FIG. 1, the actuating part 31 includes a coil 311, an elastic member 312, and a moving armature 313. The main spool 32 and the auxiliary spool 33 are both installed on the moving armature 313. The elastic member 312 is adapted to drive the auxiliary spool 33 to move towards the main valve seat 2, so that the auxiliary spool 33 abuts against the main spool 32 and closes the communication flow passage 321, and the main spool 32 abuts against the main valve seat 2 and closes the main flow passage 21. The coil 311 is adapted to drive the moving armature 313 to move away from the main valve seat 2, so that the moving armature 313 drives the auxiliary spool 33 and the main spool 32 to move away from the main valve seat 2 in sequence, so that the auxiliary spool 33 separates from the main spool 32 and opens the communication flow passage 321, and the main spool 32 separates from the main valve seat 2 and opens the main flow passage 21.

[0047] It can be understood that when the combined valve 10 is switched from the open state to the closed state, the coil 311 is powered off, the elastic force of the elastic member 312 drives the auxiliary spool 33 to move towards the main valve seat 2, so that the auxiliary spool 33 abuts against the main spool 32 and closes the communication flow passage 321, and the auxiliary spool 33 also drives the main spool 32 to move towards the main valve seat 2, so that the main spool 32 abuts against the main valve seat 2 and closes the main flow passage 21. The elastic member 312 can be a compression spring.

[0048] When the combined valve 10 is switched from the closed state to the open state, the coil 311 is powered on, the coil 311 drives the moving armature 313 to move away from the main valve seat 2, the moving armature 313 drives the auxiliary spool 33 to move away from the main valve seat 2, the auxiliary spool 33 separates from the main spool 32 first, the communication flow passage 321 is opened, the installation cavity 13 is communicated with the main flow passage 21 through the communication flow passage 321, and the medium can flow from the medium inlet 11, the installation cavity 13, the communication flow passage 321 and the main flow passage 21 to the medium outlet 12 in sequence, realizing pilot pressure relief, so that the pressure at the upper and lower ends of the main spool 32 is balanced, and the driving force required for the movement of the main spool 32 is reduced, then the main spool 32 is driven by the moving armature 313 to move away from the main valve seat 2, the main spool 32 separates from the main valve seat 2 to make the main flow passage 21 communicated with the installation cavity 13, and the medium in the installation cavity 13 can directly flow to the medium outlet 12 through the main flow passage 21.

[0049] In some embodiments of the present application, referring to FIGS. 2 and 3, the moving armature 313 has a first sub-mounting cavity 3131 communicating with the mounting cavity 13, and a portion of the main valve core 32 is arranged in the first sub-mounting cavity 3131. In the moving direction of the moving armature 313, the main valve core 32 is movable relative to the moving armature 313 within a preset range, that is, when the combined valve 10 is switched from the closed state to the open state, the moving armature 313 moves away from the main valve seat 2, within the preset range, the moving armature 313 moves relative to the main valve core 32, and the main valve core 32 is stationary relative to the main valve seat 2. The moving armature 313 can first drive the auxiliary valve core 33 to move and avoid the main valve core 32 from moving relative to the main valve seat 2. Outside the preset range, the moving armature 313 can drive the auxiliary valve core 33 and the main valve core 32 to move synchronously, so that the moving armature 313 can sequentially drive the auxiliary valve core 33 and the main valve core 32 to move.

[0050] Referring to FIG. 3, when the combined valve 10 is in the closed state, in the moving direction of the moving armature 313 (i.e., the up-down direction in FIG. 2), the distance between the main valve core 32 and the inner wall of the first sub-mounting cavity 3131 is D1, and the distance between the auxiliary valve core 33 and the moving armature 313 is D2. D1 is greater than D2. When the combined valve 10 is switched from the closed state to the open state, the coil 311 is powered on, and the coil 311 drives the moving armature 313 to move away from the main valve seat 2 (i.e., to move upward in FIG. 2). When the moving distance of the moving armature 313 is less than D2, the main valve core 32 and the auxiliary valve core 33 are stationary relative to the main valve seat 2. When the moving distance of the moving armature 313 is greater than D2 and less than D1, the moving armature 313 can drive the auxiliary valve core 33 to move synchronously away from the main valve seat 2, and at this time, the main valve core 32 is stationary relative to the main valve seat 2, so that the auxiliary valve core 33 is separated from the main valve core 32 and the communication flow passage 321 is opened. When the moving distance of the moving armature 313 is greater than D1, the moving armature 313 drives the main valve core 32 and the auxiliary valve core 33 to move synchronously away from the main valve seat 2, so that the main valve core 32 is separated from the main valve seat 2 and the main flow passage 21 is opened. D1 can be 0.2 mm, and D2 can be 0.092 mm.

[0051] In some embodiments of the present application, referring to FIGS. 1 and 2, the moving armature 313 has a detachable limiting block 314, and a portion of the main valve core 32 is located between the limiting block 314 and the moving armature 313. In the moving direction of the moving armature 313, the limiting block 314 can limit the main valve core 32, and when the moving armature 313 drives the main valve core 32, a portion of the main valve core 32 abuts against the limiting block 314. In addition, the limiting block 314 is detachable, which facilitates the installation of the main valve core 32.

[0052] In some embodiments of the present application, referring to FIG. 1, the actuating part 31 further comprises a fixed armature 315 fixedly connected with the inner wall of the mounting cavity 13, and the fixed armature 315 is located on the side of the movable armature 313 away from the main valve seat 2, so as to ensure the stability of the movable armature 313 driven by the coil 311, and at the same time, the fixed armature 315 can limit the movable armature 313 in the moving direction of the movable armature 313.

[0053] It can be understood that the coil 311, the fixed armature 315 and the movable armature 313 can form a magnetic field loop, when the coil 311 is powered, the coil 311 generates magnetic flux, the magnetic flux passes through the fixed armature 315 and the movable armature 313, and the electromagnetic force is generated between the fixed armature 315 and the movable armature 313, under the driving of the electromagnetic force, the movable armature 313 moves towards the fixed armature 315.

[0054] In some embodiments of the present application, referring to FIGS. 1-3, the movable armature 313 has a second sub-mounting cavity 3132 in communication with the mounting cavity 13, and part of the auxiliary valve core 33 is arranged in the second sub-mounting cavity 3132, and the elastic member 312 is abutted between the fixed armature 315 and the auxiliary valve core 33, so as to fix and limit the elastic member 312, since the first sub-mounting cavity 3131 and the second sub-mounting cavity 3132 are both in communication with the mounting cavity 13, the pressure at both ends of the auxiliary valve core 33 is equal in the moving direction of the movable armature 313, thereby facilitating to reduce the driving force required for the movement of the auxiliary valve core 33, so as to facilitate the actuating part 31 to drive the movement of the auxiliary valve core 33, in addition, the second sub-mounting cavity 3132 can play a guiding role for the auxiliary valve core 33, so as to improve the stability and reliability of the movement of the auxiliary valve core 33 driven by the elastic member 312.

[0055] In some embodiments of the present application, referring to FIGS. 1 and 2, the end of the auxiliary valve core 33 away from the main valve seat 2 can be a flat surface, so as to facilitate the spring to keep good contact with the auxiliary valve core 33, the flat surface can increase the contact area between the auxiliary valve core 33 and the elastic member 312, so as to uniformly distribute the pressure between the auxiliary valve core 33 and the elastic member 312, avoid local stress concentration of the auxiliary valve core 33, thereby facilitating to improve the durability and reliability of the auxiliary valve core 33.

[0056] Referring to FIG. 2, part of the elastic member 312 is arranged in the second sub-mounting cavity 3132, and the second sub-mounting cavity 3132 can also play a guiding role for the elastic member 312, when the elastic member 312 drives the movement of the auxiliary valve core 33, the second sub-mounting cavity 3132 can make the elastic member 312 stretch and contract in a preset direction, so as to make the auxiliary valve core 33 move along the preset direction, thereby facilitating to ensure the stability and reliability of the movement of the auxiliary valve core 33 driven by the elastic member 312.

[0057] In some embodiments of the present application, referring to FIG. 1, the fixed armature 315 is arranged inside the mounting cavity 13, and a sealing ring 4 and a check ring 5 are arranged between the fixed armature 315 and the inner wall of the mounting cavity 13. The check ring 5 and the sealing ring 4 can form a good sealing pair to prevent the medium from leaking from the mounting cavity 13 to the outside of the combined valve 10. The material of the check ring 5 can be PTFE (Polytetrafluoroethylene), and the sealing ring 4 can be an O-shaped sealing ring. In addition, the coil 311 is adapted to be connected to an external power source, and the coil 311 is arranged outside the mounting cavity 13, which is conducive to further ensuring the sealing performance of the mounting cavity 13 and avoiding the medium in the mounting cavity 13 from leaking to the outside of the combined valve 10 through the coil 311.

[0058] According to the combined valve 10 of the embodiments of the present application, the combined valve 10 can be configured as a pilot solenoid valve, and is suitable for a medium-high pressure working environment. The combined valve 10 has a simple structure, is easy to install and disassemble, and has low processing difficulty. The sealing spherical surface 331 of the auxiliary spool 33 and the sealing conical surface 322 of the main spool 32 are tangent to each other to form a good sealing pair, have strong cutting function, and the combined valve 10 has fast opening and closing speed.

[0059] According to another aspect of the embodiments of the present application, the gas cylinder includes the combined valve 10 of the above-mentioned embodiments.

[0060] According to the gas cylinder of the embodiments of the present application, the combined valve 10 has an open state and a closed state. When the combined valve 10 is switched from the closed state to the open state, the actuating part 31 drives the auxiliary spool 33 and the main spool 32 to move in sequence, so that the separation of the auxiliary spool 33 from the main spool 32 precedes the separation of the main spool 32 from the main valve seat 2, thereby sequentially opening the communication flow passage 321 and the main flow passage 21. After the communication flow passage 321 is opened, the pressure at both ends of the main spool 32 can be balanced, so as to reduce the driving force required for the movement of the main spool 32, facilitate the movement of the main spool 32 driven by the actuating part 31, quickly separate the main spool 32 from the main valve seat 2, and realize the rapid opening of the gas cylinder.

[0061] In some embodiments of the present application, the gas cylinder can be applied to a vehicle-mounted hydrogen storage system of a vehicle, and the gas cylinder can be configured as a hydrogen storage cylinder. The gas in the hydrogen storage cylinder can enter the combined valve 10 through the medium inlet 11, and can flow to a fuel cell stack in the vehicle through the medium outlet 12 of the combined valve 10, so as to provide a stable hydrogen environment for the fuel cell stack.

[0062] In some embodiments of the present application, referring to FIG. 1, a one-way valve 20 is connected between the medium outlet 12 of the combined valve 10 and the fuel cell stack of the vehicle. In the direction from the medium outlet 12 to the fuel cell stack, the one-way valve 20 unidirectionally communicates the medium outlet 12 and the fuel cell stack, and can prevent the medium in the fuel cell stack from flowing back to the combined valve 10 through the medium outlet 12.

[0063] In some embodiments of the present application, the outer peripheral wall of the main valve core 2 cooperates with the valve body assembly 1 to define a communication passage, which communicates the medium inlet 11 and the mounting cavity 13, and the medium can flow into the mounting cavity 13 from the medium inlet 11 and the communication passage in sequence. The communication passage does not occupy the space of the mounting cavity 13, so as to facilitate the installation and arrangement of the control assembly 3.

[0064] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0065] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A combination valve wherein, The combination valve (10) has an open state and a closed state, when the combination valve (10) is switched from the open state to the closed state, the actuating part (31) drives the secondary spool (33) to move towards the main valve seat (2) to make the secondary spool (33) abut against the primary spool (32) and block the communication flow passage (321), and the primary spool (32) abut against the main valve seat (2) and block the main flow passage (21). When the combination valve (10) is switched from the closed state to the open state, the actuating part (31) drives the secondary spool (33) and the primary spool (32) to move away from the main valve seat (2) in sequence, so that the separation of the secondary spool (33) and the primary spool (32) precedes the separation of the primary spool (32) and the main valve seat (2). The secondary spool (33) has a sealing spherical surface (331), and the primary spool (32) is formed with a sealing conical surface (322) at the inlet of the communication flow passage (321), when the secondary spool (33) abuts against the primary spool (32), the sealing conical surface (322) is tangent to the sealing spherical surface (331). The primary spool (32) comprises a spool body part (323) and a sealing part (324), the sealing part (324) is detachably mounted on the spool body part (323), the spool body part (323) is used for opening and closing the main flow passage (21), and the sealing part (324) has the sealing conical surface (322). The hardness of the secondary spool (33) is greater than the hardness of the sealing part (324). The secondary spool (33) is a steel part, and the sealing part (324) is a plastic part.

2. The combination valve of claim 1, wherein, ​ 3. The combination valve of claim 2, wherein, ​ 4. The combination valve of claim 3, wherein, ​ 5. The combination valve of claim 3 or 4, wherein, ​ 6. The combination valve of any one of claims 1-5, wherein, The actuating part (31) comprises a coil (311), an elastic member (312) and a moving armature (313), the main valve core (32) and the auxiliary valve core (33) are both mounted on the moving armature (313), the elastic member (312) is adapted to drive the auxiliary valve core (33) to move towards the main valve seat (2), and the coil (311) is adapted to drive the moving armature (313) to move away from the main valve seat (2), so that the moving armature (313) drives the auxiliary valve core (33) and the main valve core (32) to move away from the main valve seat (2) in sequence.

7. The combination valve of claim 6, wherein, The moving armature (313) has a first sub-mounting cavity (3131) in communication with the mounting cavity (13), and part of the main valve core (32) is arranged in the first sub-mounting cavity (3131), and the main valve core (32) is movable relative to the moving armature (313) within a preset range in the moving direction of the moving armature (313).

8. The combination valve of claim 6 or 7, wherein, The actuating part (31) further comprises a fixed armature (315) fixedly connected with the inner wall of the mounting cavity (13), and the fixed armature (315) is located on the side of the moving armature (313) away from the main valve seat (2).

9. The combination valve of claim 8, wherein, The moving armature (313) has a second sub-mounting cavity (3132) in communication with the mounting cavity (13), and part of the auxiliary valve core (33) is arranged in the second sub-mounting cavity (3132), and the elastic member (312) is abutted between the fixed armature (315) and the auxiliary valve core (33).

10. A gas cylinder, wherein, Comprise: The combined valve (10) according to any one of claims 1-9.

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