A throttle solenoid valve for a hydrogen fuel cell system

Abstract

The present invention relates to the field of valve technology, and discloses a throttling solenoid valve for a hydrogen fuel cell system, comprising a main valve body and a solenoid coil assembly, wherein the left end of the main valve body is provided with an inlet channel, the right end of the main valve body is provided with an outlet channel, the solenoid coil assembly is located above the main valve body, and the outer side of the solenoid coil assembly is electrically connected to a junction box, a static iron core is installed above the interior of the solenoid coil assembly, a spring is connected to the bottom of the static iron core, a moving iron core is connected to the bottom of the spring, a valve stem is connected to the bottom of the moving iron core, a valve plate is fixedly provided at the bottom of the valve stem, and a guide seat structure is sleeved at the bottom of the valve plate. The throttling solenoid valve for a hydrogen fuel cell system has a wide range of application of the valve body, and the various components of the solenoid coil assembly work together to achieve precise control of the opening and closing of the valve plate, a good pressure difference balancing effect, a high safety factor, and ensures its stability in long-term use.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, in particular to a throttling solenoid valve for a hydrogen fuel cell system. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis. Hydrogen and oxygen are supplied to the anode and cathode respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases electrons and reaches the cathode through an external load.

[0003] The throttling solenoid valve used in the existing hydrogen fuel cell system has a large resistance to fluid flow, low flow capacity and efficiency, difficulty in achieving precise control of the opening and closing of the valve plate, inconvenience in balancing the pressure difference, difficulty in improving the safety factor, and the opening and closing adjustment inside the valve is prone to deviation and shaking, and has low stability performance.

[0004] Therefore, it is necessary to design corresponding technical solutions. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a throttling solenoid valve for a hydrogen fuel cell system, which solves the technical problems of large resistance to fluid flow, low flow capacity and efficiency of the valve, difficulty in achieving precise control of the opening and closing of the valve plate, inconvenience in balancing the pressure difference, difficulty in improving the safety factor, easy deviation and shaking of the opening and closing adjustment inside the valve, and low stability performance.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A throttling solenoid valve for a hydrogen fuel cell system, comprising a main valve body and a solenoid coil assembly, wherein the left end of the main valve body is provided with an inlet channel, the right end of the main valve body is provided with an outlet channel, a guide plate with an italic structure is fixedly provided at the lower inner side of the inlet channel, a support plate 1 is fixedly provided at the inner end of the guide plate, a partition is fixedly provided at the upper inner side of the outlet channel, an extension plate is welded to the bottom of the partition, the extension plate is in a V-shaped structure and a support plate 2 is welded to the inner end, and the support plate 1 and the support plate 2 are located in the same horizontal plane;

[0009] The electromagnetic coil assembly is located above the valve body of the main valve, and the outer side of the electromagnetic coil assembly is electrically connected to a junction box, a static iron core is installed on the upper part of the interior of the electromagnetic coil assembly, a spring is connected to the bottom of the static iron core, a moving iron core is connected to the bottom of the spring, a valve stem is connected to the bottom of the moving iron core, and a valve plate is fixedly provided at the bottom of the valve stem;

[0010] The bottom of the valve plate is sleeved with a flow guide seat structure;

[0011] Slide plates are installed on both sides of the moving iron core, and the outer ends of the slide plates are slidably connected with slide rails, which are fixed to the inner side walls of the electromagnetic coil assembly.

[0012] Preferably, the guide seat structure includes a pilot valve base, a baffle is fixedly provided on the outer bottom of the pilot valve base, an auxiliary block is fixedly provided on the top outer end of the pilot valve base, the outer end of the auxiliary block is an arc-shaped structure, and a valve cover is fixedly provided on the top inner end of the pilot valve base; the pilot valve base is used to support the diversion effect, the baffle is used to limit and block when moving upward to open the channel, the auxiliary block with an arc-shaped structure on the outer end is used to avoid jamming when adjusting upward, and has a good sliding effect, and the valve cover is used to limit and block the valve plate, so that the valve plate lifts or presses down the guide seat structure as a whole.

[0013] Preferably, the valve cover is an inverted L-shaped structure, the pilot valve base is a U-shaped structure, and the valve cover and the inner side wall of the pilot valve base are located on the same vertical plane; the valve cover with the inverted L-shaped structure and the pilot valve base with the U-shaped structure form an enclosed state, which can limit the valve plate inside, lift the overall guide seat structure, and lower the sealed pilot valve base, thereby sealing and closing the channel.

[0014] Preferably, an axle seat is fixedly provided inside the pilot valve base, a hydraulic rod is connected to the top of the axle seat, a hydraulic cylinder is connected to the top of the hydraulic rod, a fixing plate is fixed to the top of the hydraulic cylinder, and the fixing plate is fixed to the lower end of the inner wall of the electromagnetic coil assembly; the axle seat is used for movable support, and the hydraulic rod and the hydraulic cylinder are used for hydraulic telescopic auxiliary support of the guide seat structure to adjust up and down to avoid shaking.

[0015] Preferably, a slide groove is provided at the inner end of the slide rail, a limit groove is provided inside the slide rail, and the slide groove is communicated with the limit groove; an adapter plate is fixedly provided at the outer end of the slide plate, a limit plate is fixedly provided at the inner end of the adapter plate, and an installation groove is provided at the corner of the slide plate; the adapter plate is limited to sliding between the slide grooves, and the limit plate is limited to sliding inside the limit groove, so that the sliding of the slide plate is more stable, and the installation groove is used to install the slide plate to the upper side of the moving iron core by passing bolts.

[0016] Preferably, pulley grooves are provided at both ends of the outer side of the slide rail, empty grooves are provided at both ends of the outer side of the slide plate, a shaft rod 1 is rotatably connected in the middle of the empty groove, and a limiting pulley is fixedly provided in the middle of the shaft rod 1; the pulley grooves are used for limiting the sliding of multiple limiting pulleys, the empty grooves are used for rotation adjustment of multiple embedded limiting pulleys, and the shaft rod 1 is used to support the rotation of the limiting pulley.

[0017] Preferably, an inner groove is provided on the inner side wall of the slide groove, and an inner embedded plate is fixedly distributed in the middle of the side of the adapter plate, and the inner embedded plate is a semicircular plate-shaped structure; the inner groove is used to limit the sliding of multiple inner embedded plates of the semicircular plate-shaped structure, so that the sliding is more stable and prevents shaking.

[0018] Preferably, a support plate is fixedly distributed in the middle of the front and rear sides of the limit plate, and an axle rod 2 is rotatably connected between the support plates. A sliding ball is rotatably connected in the middle of the axle rod 2, and the sliding ball is slidably connected to the inner wall of the limit groove; the support plate is used to support the rotation adjustment of the axle rod 2, and the axle rod 2 is used to support the sliding ball to rotate and adjust, so that it contacts the inner wall of the limit groove for sliding, with high fluency and avoiding blockage.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention has the following beneficial effects: the valve body is suitable for hydrogen fuel cell systems, and by arranging a guide plate with an oblique structure at the lower inner side of the inlet channel and a V-shaped extension plate at the upper inner side of the outlet channel, the flow path of the fluid is effectively improved, the fluid resistance is reduced, and the flow capacity and efficiency of the valve are improved. At the same time, support plate one and support plate two are used to seal and stably support the valve plate, and through the coordinated work of various components of the electromagnetic coil assembly, precise control of the opening and closing of the valve plate is achieved, with fast response speed, high control accuracy, and stable and reliable operation. Through the set guide seat structure, the pressure difference is well balanced and the safety factor is high. The sliding mechanism makes the lifting and lowering adjustment more flexible and stable, and effectively prevents the displacement and shaking of the moving iron core lifting and lowering adjustment, which not only improves the operational flexibility of the solenoid valve, but also ensures its stability in long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the valve in the closed state of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the valve in the open state of the present invention;

[0023] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0024] Figure 4 It is a schematic diagram of the sliding auxiliary mechanism of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the sliding auxiliary mechanism of the present invention from a top view;

[0026] Figure 6 It is a schematic diagram of the inner end structure of the skateboard of the present invention;

[0027] Figure 7 It is a schematic diagram of the inner end structure of the slide rail of the present invention;

[0028] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0029] Fig. 9 It is a schematic diagram of the cross-sectional structure of the middle position of the slide rail of the present invention.

[0030] In the figure, 1, main valve body; 11, inlet channel; 111, guide plate; 112, support plate 1; 12, outlet channel; 121, partition plate; 122, extension plate; 123, support plate 2; 2, electromagnetic coil assembly; 21, junction box; 22, static iron core; 221, spring; 222, moving iron core; 223, valve stem; 2231, valve plate; 23, slide rail; 2301, pulley groove; 231, limit groove; 232, slide groove; 2321, inner groove ; 24, slide plate; 2401, empty slot; 2402, shaft rod one; 2403, limit pulley; 2404, mounting slot; 241, adapter plate; 2411, embedded plate; 242, limit plate; 2421, sliding ball; 2422, shaft rod two; 2423, support plate; 25, hydraulic cylinder; 251, hydraulic rod; 252, fixed plate; 253, shaft seat; 26, pilot valve base; 261, auxiliary block; 262, baffle; 263, valve cover. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 9 The embodiment of the present invention provides a technical solution: a throttling solenoid valve for a hydrogen fuel cell system, comprising a main valve body 1 and a solenoid coil assembly 2, wherein an inlet channel 11 is arranged at the left end of the main valve body 1, and an outlet channel 12 is arranged at the right end of the main valve body 1, a guide plate 111 with an oblique structure is fixedly arranged at the lower inner side of the inlet channel 11, a support plate 112 is fixedly arranged at the inner end of the guide plate 111, a partition plate 121 is fixedly arranged at the upper inner side of the outlet channel 12, an extension plate 122 is welded at the bottom of the partition plate 121, the extension plate 122 is in a V-shaped structure and a support plate 2 123 is welded at the inner end, and the support plate 1 112 and the support plate 2 123 are located at the same horizontal plane;

[0033] The electromagnetic coil assembly 2 is located above the main valve body 1, and the outer side of the electromagnetic coil assembly 2 is electrically connected to the junction box 21, and a static iron core 22 is installed on the upper part of the interior of the electromagnetic coil assembly 2, the bottom of the static iron core 22 is connected to a spring 221, the bottom of the spring 221 is connected to a moving iron core 222, the bottom of the moving iron core 222 is connected to a valve stem 223, and the bottom of the valve stem 223 is fixedly provided with a valve plate 2231;

[0034] The bottom of the valve plate 2231 is sleeved with a flow guide seat structure;

[0035] Slide plates 24 are installed on both sides of the moving iron core 222 . The outer ends of the slide plates 24 are slidably connected to slide rails 23 . The slide rails 23 are fixed to the inner side walls of the electromagnetic coil assembly 2 .

[0036] The valve body has a wide range of applications. By arranging a guide plate 111 with an italic structure at the lower inner side of the inlet channel 11 and a V-shaped extension plate 122 at the upper inner side of the outlet channel 12, the flow path of the fluid is effectively improved, the fluid resistance is reduced, and the flow capacity and efficiency of the valve are improved. At the same time, the support plate 112 and the support plate 2 123 are used to seal and stably support the valve plate 2231. Through the coordinated work of the various components of the electromagnetic coil assembly 2, the opening and closing of the valve plate 2231 is accurately controlled, and the response speed is fast, the control accuracy is high, and the operation is stable and reliable. Through the set guide seat structure, the pressure difference is well balanced and the safety factor is high. The sliding mechanism makes the lifting and lowering adjustment more flexible and stable, and effectively prevents the displacement and shaking of the moving iron core 222 during the lifting and lowering adjustment, which not only improves the operational flexibility of the solenoid valve, but also ensures its stability in long-term use.

[0037] Further improved, the guide seat structure includes a pilot valve base 26, a baffle 262 is fixedly provided at the outer bottom of the pilot valve base 26, an auxiliary block 261 is fixedly provided at the top outer end of the pilot valve base 26, the outer end of the auxiliary block 261 is an arc-shaped structure, and a valve cover 263 is fixedly provided at the top inner end of the pilot valve base 26;

[0038] The pilot valve base 26 is used to support the diversion function, the baffle 262 is used to limit and block when moving upward to open the channel, the auxiliary block 261 with an arc-shaped structure at the outer end is used to avoid jamming when adjusting upward, and has a good sliding effect. The valve cover 263 is used to limit and block the valve plate 2231, so that the valve plate 2231 lifts or presses down the guide seat structure as a whole.

[0039] In a further improvement, the valve cover 263 is an inverted L-shaped structure, the pilot valve base 26 is a U-shaped structure, and the inner side wall of the valve cover 263 and the pilot valve base 26 are located on the same vertical plane;

[0040] The inverted L-shaped valve cover 263 and the U-shaped pilot valve base 26 form an enclosed state, which can limit the valve plate 2231 inside, lift the overall guide seat structure, and lower the sealed pilot valve base 26, thereby sealing and closing the channel.

[0041] Further improved, a shaft seat 253 is fixedly provided inside the pilot valve base 26, a hydraulic rod 251 is connected above the shaft seat 253, a hydraulic cylinder 25 is connected above the hydraulic rod 251, a fixing plate 252 is fixed above the hydraulic cylinder 25, and the fixing plate 252 is fixedly provided at the lower end of the inner side wall of the electromagnetic coil assembly 2;

[0042] The shaft seat 253 is used for movable support, and the hydraulic rod 251 and the hydraulic cylinder 25 are used for hydraulic telescopic auxiliary support of the guide seat structure to adjust up and down to avoid shaking.

[0043] As a further improvement, a slide groove 232 is provided at the inner end of the slide rail 23, and a limiting groove 231 is provided inside the slide rail 23, and the slide groove 232 is connected to the limiting groove 231;

[0044] An adapter plate 241 is fixedly provided at the outer end of the slide plate 24, a limit plate 242 is fixedly provided at the inner end of the adapter plate 241, and a mounting groove 2404 is provided at the corner of the slide plate 24;

[0045] The adapter plate 241 is limited to slide between the slide grooves 232, and the limit plate 242 is limited to slide inside the limit groove 231, so that the sliding of the slide plate 24 is more stable. The installation groove 2404 is used to install the slide plate 24 to the upper side of the moving iron core 222 with bolts passing through.

[0046] As a further improvement, pulley grooves 2301 are provided at both ends of the outer side of the slide rail 23, and empty grooves 2401 are provided at both ends of the outer side of the slide plate 24. A shaft rod 2402 is rotatably connected to the middle of the empty groove 2401, and a limiting pulley 2403 is fixedly provided at the middle of the shaft rod 2402.

[0047] The pulley groove 2301 is used for limiting the sliding of multiple limiting pulleys 2403, the empty groove 2401 is used for embedding multiple limiting pulleys 2403 for rotation adjustment, and the shaft rod 2402 is used to support the limiting pulley 2403 for rotation.

[0048] As a further improvement, an inner groove 2321 is provided on the inner side wall of the slide groove 232, and an inner plate 2411 is fixedly distributed in the middle of the side of the adapter plate 241, and the inner plate 2411 is a semicircular plate-shaped structure;

[0049] The inner groove 2321 is used to limit the sliding of the inner embedded plate 2411 of multiple semicircular plate-shaped structures, making the sliding more stable and preventing shaking.

[0050] A support plate 2423 is fixedly distributed in the middle of the front and rear sides of the limiting plate 242, a second shaft 2422 is rotatably connected between the support plates 2423, a sliding ball 2421 is rotatably connected in the middle of the second shaft 2422, and the sliding ball 2421 is slidably connected to the inner wall of the limiting groove 231;

[0051] The support plate 2423 is used to support the rotation adjustment of the second shaft rod 2422, and the second shaft rod 2422 is used to support the rotation adjustment of the sliding ball 2421. The sliding ball 2421 slides on the inner wall of the limiting groove 231 with high smoothness to avoid blockage.

[0052] Working principle: When in the closed state, the spring 221 is in a stretched state, the moving iron core 222, the valve stem 223 and the valve plate 2231 are compressed downward, the valve plate 2231 is sealed and pressed above the pilot valve base 26, and the pilot valve base 26 is sealed and pressed above the support plate 1 112 and the support plate 2 123, blocking the flow of fluid;

[0053] The fluid fills the inlet channel 11 and the interior of the electromagnetic coil assembly 2 to balance the pressure difference;

[0054] When it is necessary to open, power is supplied to the electromagnetic coil assembly 2 through the junction box 21, the static iron core 22 is started, and the spring 221 contracts, so that the moving iron core 222, the valve stem 223 and the valve plate 2231 are lifted upward, and the valve cover 263 is lifted, and the electromagnetic coil assembly 2 is limited and slid to the bottom of the interior through the auxiliary block 261 and the pilot valve base 26, and the baffle plate 262 is limited and blocked, and the valve plate 2231 seals the top of the valve cover 263;

[0055] The fluid enters through the inlet channel 11 , passes between the support plate 1 112 and the support plate 2 123 , and then flows out from the outlet channel 12 .

[0056] The main valve body 1 of the present invention, the inlet channel 11, the guide plate 111, the support plate 112, the outlet channel 12, the partition 121, the extension plate 122, the support plate 123, the electromagnetic coil assembly 2, the junction box 21, the static iron core 22, the spring 221, the moving iron core 222, the valve stem 223, the valve plate 2231, the slide rail 23, the pulley groove 2301, the limit groove 231, the slide groove 232, the inner groove 2321, the slide plate 24, the empty groove 2401, the shaft rod 1 2402, the limit pulley 2403, the installation groove 2404, the adapter plate 241, inner plate 2411, limit plate 242, sliding ball 2421, shaft rod 2422, support plate 2423, hydraulic cylinder 25, hydraulic rod 251, fixing plate 252, shaft seat 253, pilot valve base 26, auxiliary block 261, baffle 262, valve cover 263, all components are universal standard parts or components known to those skilled in the art, and their structures and principles can be known by the technicians in the field through technical manuals or conventional experimental methods. The problem solved by the present invention is that the resistance to fluid flow is large, and the flow capacity of the valve is large. The force and efficiency are low, it is difficult to achieve precise control of the opening and closing of the valve plate 2231, it is inconvenient to balance the pressure difference, the safety factor is difficult to improve, the opening and closing adjustment inside the valve is easy to deviate and shake, and the stability performance is low. The present invention combines the above-mentioned components with each other, and the valve body has a wide range of applications. By arranging the guide plate 111 with an italic structure at the lower inner side of the inlet channel 11 and the V-shaped extension plate 122 at the upper inner side of the outlet channel 12, the flow path of the fluid is effectively improved, the fluid resistance is reduced, and the flow capacity and efficiency of the valve are improved. At the same time, the support plate 112 and the support plate 2 123 are used to seal and stably support the valve plate 2231. Through the coordinated work of the various components of the electromagnetic coil assembly 2, the precise control of the opening and closing of the valve plate 2231 is achieved, the response speed is fast, the control accuracy is high, and the operation is stable and reliable. Through the set guide seat structure, the pressure difference is well balanced and the safety factor is high. The sliding mechanism makes the lifting adjustment more flexible and stable, and effectively prevents the displacement and shaking of the lifting adjustment of the moving iron core 222, which not only improves the operational flexibility of the electromagnetic valve, but also ensures its stability in long-term use.

[0057] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A throttling solenoid valve for a hydrogen fuel cell system, comprising a main valve body (1) and a solenoid coil assembly (2), characterized in that: An inlet channel (11) is provided at the left end of the main valve body (1), and an outlet channel (12) is provided at the right end of the main valve body (1); a guide plate (111) with an oblique structure is fixedly provided at the lower inner side of the inlet channel (11); a support plate 1 (112) is fixedly provided at the inner end of the guide plate (111); a partition plate (121) is fixedly provided at the upper inner side of the outlet channel (12); an extension plate (122) is welded to the bottom of the partition plate (121); the extension plate (122) is in a V-shaped structure and a support plate 2 (123) is welded to the inner end; the support plate 1 (112) and the support plate 2 (123) are located on the same horizontal plane; The electromagnetic coil assembly (2) is located above the main valve body (1), and the outer side of the electromagnetic coil assembly (2) is electrically connected to a junction box (21), a static iron core (22) is installed above the inside of the electromagnetic coil assembly (2), the bottom of the static iron core (22) is connected to a spring (221), the bottom of the spring (221) is connected to a moving iron core (222), the bottom of the moving iron core (222) is connected to a valve stem (223), and a valve plate (2231) is fixedly provided at the bottom of the valve stem (223); The bottom of the valve plate (2231) is sleeved with a flow guide seat structure; Slide plates (24) are installed on both sides of the moving iron core (222), the outer ends of the slide plates (24) are slidably connected to slide rails (23), and the slide rails (23) are fixed to the inner side walls of the electromagnetic coil assembly (2); The flow guide seat structure comprises a pilot valve base (26), a baffle (262) is fixedly provided on the outer bottom of the pilot valve base (26), an auxiliary block (261) is fixedly provided on the top outer end of the pilot valve base (26), the outer end of the auxiliary block (261) is an arc-shaped structure, and a valve cover (263) is fixedly provided on the top inner end of the pilot valve base (26); The valve cover (263) is an inverted L-shaped structure, the pilot valve base (26) is a U-shaped structure, and the inner side walls of the valve cover (263) and the pilot valve base (26) are located on the same vertical plane; An axle seat (253) is fixedly provided inside the pilot valve base (26); a hydraulic rod (251) is connected to the top of the axle seat (253); a hydraulic cylinder (25) is connected to the top of the hydraulic rod (251); a fixing plate (252) is fixedly provided above the hydraulic cylinder (25); and the fixing plate (252) is fixedly provided at the lower end of the inner wall of the electromagnetic coil assembly (2).

2. A throttling solenoid valve for a hydrogen fuel cell system according to claim 1, characterized in that: A slide groove (232) is provided at the inner end of the slide rail (23), a limiting groove (231) is provided inside the slide rail (23), and the slide groove (232) is connected to the limiting groove (231); An adapter plate (241) is fixedly provided at the outer end of the slide plate (24), a limit plate (242) is fixedly provided at the inner end of the adapter plate (241), and a mounting groove (2404) is provided at a corner of the slide plate (24).

3. A throttling solenoid valve for a hydrogen fuel cell system according to claim 2, characterized in that: The outer ends of the slide rail (23) are provided with pulley grooves (2301), the outer ends of the slide plate (24) are provided with empty grooves (2401), the middle of the empty groove (2401) is rotatably connected to an axle rod 1 (2402), and the middle of the axle rod 1 (2402) is fixedly provided with a limiting pulley (2403).

4. A throttling solenoid valve for a hydrogen fuel cell system according to claim 3, characterized in that: An inner groove (2321) is provided on the inner side wall of the slide groove (232), and an inner embedded plate (2411) is fixedly distributed in the middle of the side of the adapter plate (241), and the inner embedded plate (2411) is a semicircular plate-shaped structure.

5. A throttling solenoid valve for a hydrogen fuel cell system according to claim 4, characterized in that: A support plate (2423) is fixedly distributed in the middle of the front and rear sides of the limiting plate (242), a second shaft rod (2422) is rotatably connected between the support plates (2423), a sliding ball (2421) is rotatably connected in the middle of the second shaft rod (2422), and the sliding ball (2421) is slidably connected to the inner wall of the limiting groove (231).

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