A hydrogen fuel cell power generation system overload protection device

Abstract

The present invention relates to the field of fuel cell technology, and discloses an overload protection device for a hydrogen fuel cell power generation system, comprising a housing, a box body fixedly connected to the rear side of the housing, a protective mechanism provided on the inner side of the housing, and an electrode plate, two of which are fixedly connected to the left and right ends of the inner side of the housing, respectively. A microporous layer is fixedly connected to the left and right sides of the inner side of the housing, and a plurality of catalytic layers are fixedly connected to the middle of the inner side of the housing at equal intervals. A movable plate is slidably connected to the inner side of the housing, and protective plug plates are fixedly connected to the left and right sides of the front wall of the movable plate. The front ends of the two protective plug plates pass through the housing and the housing in sequence. The push plate is driven to rotate by a support column, and the movable column pushes the support plate forward through a groove, and the movable plate then drives the protective plug plate forward, thereby inserting it between the plurality of catalytic layers, isolating the transfer of protons, and immediately stopping the power generation of the hydrogen fuel cell.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to an overload protection device for a hydrogen fuel cell power generation system. Background Art

[0002] A hydrogen fuel cell is a power generation device that converts the chemical energy of hydrogen and oxygen directly into electrical energy. Its operating principle is based on an electrochemical reaction: hydrogen is decomposed by a catalyst at the anode into hydrogen ions and electrons. The electrons flow through an external circuit to form an electric current, while the hydrogen ions travel through the electrolyte membrane to the cathode, where they combine with oxygen to form water.

[0003] Hydrogen fuel cells have the advantages of high efficiency, cleanliness and zero emissions, and are increasingly used in the automotive, distributed power generation and aerospace fields. However, during operation, hydrogen fuel cell power generation systems face various complex working conditions and uncertainties, such as sudden load increases and circuit failures, which may cause system overload. At this time, overload protection devices are needed to protect the hydrogen fuel cells.

[0004] Currently available hydrogen fuel cells are primarily composed of a housing, two electrodes, a catalyst layer, and a gas diffusion layer. During use, hydrogen and oxygen are introduced to the positive and negative electrodes, respectively. These gases are then evenly dispersed into the catalyst layer through the gas diffusion layer. Hydrogen reacts with the catalyst layer to generate protons and electrons, which react with oxygen to generate water. The electrons then transmit electricity through an external circuit. However, when an overload occurs, arcing can occur within the device, causing damage or even explosion. To address this issue, existing technologies directly disconnect the external circuit upon detecting an overload, halting the internal reaction of the hydrogen fuel cell by blocking electron circulation. While this approach can quickly prevent damage to the battery due to overload, it can cause the entire power generation system to stop operating instantly, requiring time to restart and resume normal operation. Existing technologies employ overload protection by adding a control valve to the hydrogen inlet to halt hydrogen supply to the fuel cell when an overload occurs. However, when an overload occurs, hydrogen already inside the fuel cell continues to react, generating arcs and causing breakdown of the catalyst layer. This reduces the device's service life and fails to meet user needs. Summary of the Invention

[0005] In response to the deficiencies of the prior art, the present invention provides an overload protection device for a hydrogen fuel cell power generation system, which solves the problem that after the hydrogen fuel cell overload protection device is activated, the residual hydrogen inside will still participate in the chemical reaction.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an overload protection device for a hydrogen fuel cell power generation system, comprising a housing, a box body fixedly connected to the rear side of the housing, a protection mechanism provided on the inner side of the box body, the protection mechanism being used to conveniently provide overload protection for the hydrogen fuel cell, a control mechanism provided on the left side of the housing, the control mechanism being used to conveniently control the power of the hydrogen fuel cell, and a filter mechanism provided on the right side of the housing, the filter mechanism being used to conveniently filter air entering the device;

[0007] The protective mechanism includes an electrode plate, and the two electrode plates are respectively fixedly connected to the left and right ends of the interior of the shell, and the left and right sides of the interior of the shell are fixedly connected with a microporous layer. A plurality of catalytic layers are fixedly connected at equal intervals to the middle part of the inner side of the shell, and a movable plate is slidably connected to the inner side of the box body. The left and right sides of the front wall of the movable plate are fixedly connected with protective plug plates, and the front ends of the two protective plug plates pass through the box body and the shell in sequence, and a movable component is provided on the rear side of the movable plate.

[0008] Preferably, the control mechanism includes a hydrogen delivery pipe, which is connected to the middle left side of the shell, and the right end of the hydrogen delivery pipe passes through the shell and the left electrode plate in sequence. The top of the hydrogen delivery pipe is fixedly connected to a hollow block, and the inner bottom end of the hollow block is rotatably connected to a hollow tube. The bottom end of the hollow tube passes through the hollow block and the hydrogen delivery pipe in sequence and is fixedly connected to a first valve body. The inner top end of the hollow block is rotatably connected to a rotating rod, and the bottom end of the rotating rod passes through the hollow tube and is fixedly connected to the second valve body. The outer top ends of the hollow tube and the rotating rod are fixedly connected to support plates, and the adjacent sides of the two support plates are fixedly connected to a rotating shaft. A rotating component is provided inside the hollow block.

[0009] Preferably, the filtering mechanism includes an air delivery pipe, which is connected to the right side of the shell, and the left end of the air delivery pipe passes through the shell and the right side electrode plate in sequence. A filter is fixedly connected to the middle part of the inner side of the air delivery pipe, and the right side of the filter is rotatably connected to a transmission rod, the right end of the transmission rod is fixedly connected to an impeller, and a scraper is fixedly connected to the left side of the outer wall of the transmission rod. A collection assembly is provided at the bottom of the air delivery pipe.

[0010] Preferably, the moving assembly includes a support plate, which is fixedly connected to the rear side of the movable plate, a groove is provided on the outer side of the support plate, and a movable column is slidably connected to the inner side of the groove, a motor is fixedly connected to the bottom of the rear side of the right wall of the box, the output end of the motor passes through the box and is fixedly connected to the support column, and the left and right ends of the outer sides of the support column are fixedly connected to push plates, and the tops of the adjacent sides of the two push plates are rotatably connected to the left and right ends of the movable column respectively.

[0011] Preferably, the rotating assembly includes a motor, which is fixedly connected to the right side of the hollow block. The output end of the motor passes through the hollow block and is fixedly connected to a threaded rod. The outer side of the threaded rod is threadedly connected to a slider. The front and rear ends of the left side of the slider are fixedly connected to support blocks. The left sides of the two support blocks are rotatably connected to connecting rods, and the left ends of the two connecting rods are rotatably connected to corresponding rotating shafts respectively.

[0012] Preferably, the collecting assembly includes a collecting trough, which is opened at the bottom of the air conveying pipe, and a collecting box is fixedly connected to the middle part of the outer side of the air conveying pipe.

[0013] Preferably, the control mechanism further comprises a box door, which is arranged at the lower middle part of the right side of the collection box, and hinges are fixedly connected to the upper and lower sides of the front end of the right wall of the box door, and the box door is rotatably connected to the collection box through the hinges.

[0014] Preferably, the control mechanism further comprises a connecting port, which is connected to the right end of the air delivery pipe, and the inner size of the air delivery pipe matches the size of the filter screen.

[0015] Preferably, the control mechanism further includes a slide groove, and the two slide grooves are respectively opened on the front and rear sides of the interior of the hollow block, and the front and rear sides of the slider are respectively slidably connected to the corresponding slide grooves.

[0016] Preferably, the left and right sides of the top of the shell are both connected with air outlets, and the outer tops of the two air outlets are both provided with connecting threads.

[0017] The present invention provides an overload protection device for a hydrogen fuel cell power generation system.

[0018] Beneficial effects:

[0019] 1. The present invention drives the support column to rotate through a motor, thereby driving the push plate to rotate. The movable column will move accordingly, and the support plate can be pushed forward through the groove. The movable plate will then drive the protective plug plate to move forward, thereby being inserted between multiple catalytic layers to isolate the transfer of protons, which can immediately stop the power generation of the hydrogen fuel cell, so that the hydrogen fuel cell will not be damaged due to overload, thereby increasing the service life of the device and meeting the needs of users.

[0020] 2. The present invention drives the threaded rod to rotate through a motor, and the slider drives the two support blocks to move synchronously. The support blocks can push the rotating shaft to move through the connecting rod, thereby driving the support plate to rotate. The two support plates will respectively drive the hollow tube and the rotating rod to rotate relative to each other, thereby driving the first valve body and the second valve body to rotate. By controlling the angle between the first valve body and the second valve body, the flow rate of hydrogen entering the device can be conveniently controlled, thereby controlling the power generation power of the hydrogen fuel cell, and improving the convenience of using the device.

[0021] 3. The present invention can deliver air to the device through an air delivery pipe. The filter screen will filter the air entering the device, and impurities will accumulate on the filter screen. When the air passes through the air delivery pipe, it will impact the impeller, causing the impeller to start rotating, thereby driving the scraper to rotate through the transmission rod, scraping the impurities accumulated on the filter screen from the collection tank and causing the impurities to fall into the collection box, ensuring that the filter screen will not be blocked due to the accumulation of impurities, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the present invention;

[0023] Figure 2 It is a front view of the present invention;

[0024] Figure 3 A partial structural cross-sectional view of the protective mechanism of the present invention;

[0025] Figure 4 This is a partial structural breakdown diagram of the protection mechanism of the present invention;

[0026] Figure 5 It is a cross-sectional view of the hollow block structure of the present invention;

[0027] Figure 6 This is a partial structural breakdown diagram of the control mechanism of the present invention;

[0028] Figure 7 It is a partial structural schematic diagram of the filtering mechanism of the present invention;

[0029] Figure 8 It is a partial structural cross-sectional view of the filtering mechanism of the present invention.

[0030] Among them, 1. shell; 2. protection mechanism; 201. electrode plate; 202. microporous layer; 203. catalytic layer; 204. movable plate; 205. protection plug plate; 206. support plate; 207. groove; 208. movable column; 209. motor; 210. support column; 211. push plate; 3. control mechanism; 301. hydrogen delivery pipe; 302. hollow block; 303. hollow tube; 304. first valve body; 305. second valve body; 306. support plate; 3 07. Rotating shaft; 308. Motor; 309. Threaded rod; 310. Slider; 311. Support block; 312. Connecting rod; 313. Slide groove; 314. Rotating rod; 4. Filter mechanism; 401. Air duct; 402. Filter screen; 403. Transmission rod; 404. Scraper; 405. Impeller; 406. Collection trough; 407. Collection box; 408. Box door; 409. Hinge; 410. Connecting port; 5. Box body; 6. Air outlet; 7. Connecting thread. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. 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 making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figure 1 、 Figure 3 and Figure 4 An embodiment of the present invention provides an overload protection device for a hydrogen fuel cell power generation system, comprising a housing 1, a box body 5 fixedly connected to the rear side of the housing 1, a protection mechanism 2 provided on the inner side of the box body 5, the protection mechanism 2 being used to conveniently provide overload protection for the hydrogen fuel cell, a control mechanism 3 provided on the left side of the housing 1, the control mechanism 3 being used to conveniently control the power of the hydrogen fuel cell, and a filter mechanism 4 provided on the right side of the housing 1, the filter mechanism 4 being used to conveniently filter air entering the device;

[0033] The protection mechanism 2 includes an electrode plate 201, and the two electrode plates 201 are fixedly connected to the left and right ends of the interior of the shell 1 respectively. The left and right sides of the interior of the shell 1 are fixedly connected with a microporous layer 202, and the microporous layer 202 can disperse oxygen and hydrogen. A plurality of catalytic layers 203 are fixedly connected to the middle of the inner side of the shell 1 at equal intervals. A movable plate 204 is slidably connected to the inner side of the box 5. The movable plate 204 can slide inside the box 5. The left and right sides of the front wall of the movable plate 204 are fixedly connected with protective plug plates 205. The front ends of the two protective plug plates 205 pass through the box 5 and the shell 1 in sequence. The movable plate 204 will drive the protective plug plates 205 to be inserted between the plurality of catalytic layers 203. A moving component is provided on the rear side of the movable plate 204. The moving component The components include a support plate 206, which is fixedly connected to the rear side of the movable plate 204. A groove 207 is provided on the outer side of the support plate 206, and a movable column 208 is slidably connected to the inner side of the groove 207. The movable column 208 can push the support plate 206 to move through the groove 207. A motor 209 is fixedly connected to the bottom of the rear side of the right wall of the box body 5. The output end of the motor 209 passes through the box body 5 and is fixedly connected to the support column 210. The motor 209 drives the support column 210 to rotate. The left and right ends of the outer sides of the support column 210 are fixedly connected with push plates 211. The tops of the adjacent sides of the two push plates 211 are respectively rotatably connected to the left and right ends of the movable column 208. When the support column 210 rotates, it can be pushed by the push plates 211.

[0034] Specifically, during the use of the hydrogen fuel cell, when the hydrogen fuel cell is overloaded, the motor 209 starts and drives the support column 210 to start rotating. As the support column 210 rotates, the push plate 211 is further driven to start rotating. During the rotation, the push plate 211 pushes the movable column 208 to move. During the movement, the movable column 208 can push the support plate 206 forward through the groove 207, and drive the movable plate 204 forward, and then drive the protective plug plate 205 forward. The protective plug plate 205 will be inserted between the multiple catalytic layers 203 to isolate the proton transfer path, thereby immediately stopping the hydrogen fuel cell's power generation work, protecting the hydrogen fuel cell from damage due to overload, and improving the service life of the device to meet the needs of users.

[0035] Reference Figure 2 、 Figure 5 and Figure 6, the control mechanism 3 includes a hydrogen delivery pipe 301, which is connected to the middle of the left side of the shell 1, and the right end of the hydrogen delivery pipe 301 sequentially penetrates the shell 1 and the left electrode plate 201, and hydrogen can enter the device through the hydrogen delivery pipe 301, and the top of the hydrogen delivery pipe 301 is fixedly connected to a hollow block 302, and the inner bottom end of the hollow block 302 is rotatably connected to a hollow tube 303, and the bottom end of the hollow tube 303 sequentially penetrates the hollow block 302 and the hydrogen delivery pipe 301 and is fixedly connected to a first valve body 304, and the hollow tube 303 can drive the first valve body 304 to rotate, and the inner top end of the hollow block 302 is rotatably connected to a rotating rod 314, and the bottom end of the rotating rod 314 penetrates the hollow tube 303 and is fixedly connected to the second valve body 305, and the rotating rod 314 will drive the second valve body 305 to rotate, and the outer top ends of the hollow tube 303 and the rotating rod 314 are fixedly connected to a support plate 306, and the two The support disc 306 will drive the hollow tube 303 and the rotating rod 314 to rotate relative to each other. The adjacent sides of the two support discs 306 are fixedly connected to the rotating shaft 307. A rotating assembly is provided inside the hollow block 302. The rotating assembly includes a motor 308. The motor 308 is fixedly connected to the right side of the hollow block 302. The output end of the motor 308 passes through the hollow block 302 and is fixedly connected to the threaded rod 309. The motor 308 will drive the threaded rod 309 to rotate. The outer side of the threaded rod 309 is threadedly connected to a slider 310. The front and rear ends of the left side of the slider 310 are fixedly connected to the support block 311. When the threaded rod 309 rotates, the slider 310 will drive the support block 311 to move. The left sides of the two support blocks 311 are rotatably connected to the connecting rod 312. The left ends of the two connecting rods 312 are respectively rotatably connected to the corresponding rotating shaft 307. The support block 311 can drive the rotating shaft 307 to move through the connecting rod 312.

[0036] Specifically, when it is necessary to adjust the power generation power of the hydrogen fuel cell, when the motor 308 starts working, it will drive the threaded rod 309 to rotate. As the threaded rod 309 rotates, the slider 310 will move along the threaded rod 309, and the slider 310 will drive the two support blocks 311 to move synchronously. The movement of the support block 311 is transmitted to the rotating shaft 307 through the connecting rod 312, causing the rotating shaft 307 to move. The displacement of the rotating shaft 307 will cause the support plate 306 to start rotating. At this time, the two support plates 306 will respectively drive the hollow tube 303 and the rotating rod 314 to rotate in opposite directions. The hollow tube 303 and the rotating rod 314 will further drive the first valve body 304 and the second valve body 305 to rotate. By precisely adjusting the angle between the first valve body 304 and the second valve body 305, fine control of the hydrogen flow rate can be achieved, thereby adjusting the power generation power of the hydrogen fuel cell, thereby improving the convenience of using the device.

[0037] Reference Figure 1 、 Figure 7 and Figure 8, the filtering mechanism 4 includes an air delivery pipe 401, which is connected to the right side of the shell 1, and the left end of the air delivery pipe 401 passes through the shell 1 and the right side electrode plate 201 in sequence. The air delivery pipe 401 can enter the device through the air delivery pipe 401, and a filter screen 402 is fixedly connected to the middle part of the inner side of the air delivery pipe 401. The filter screen 402 can filter the air entering the device, and the right side of the filter screen 402 is rotatably connected to a transmission rod 403, and the right end of the transmission rod 403 is fixedly connected to an impeller 405. A scraper 404 is fixedly connected to the left side of the outer wall of the transmission rod 403. When the impeller 405 rotates, the scraper 404 can be driven to rotate through the transmission rod 403. A collecting component is provided at the bottom of the air delivery pipe 401, and the collecting component includes a collecting tank 406. The collecting tank 406 is opened at the bottom of the air delivery pipe 401, and a collecting box 407 is fixedly connected to the middle part of the outer side of the air delivery pipe 401. The collecting box 407 can collect impurities;

[0038] Specifically, when the device is used, air can be transported to the inside of the device through the air delivery pipe 401, and the filter 402 can filter the air entering the device. Impurities will be intercepted by the filter 402 and gradually accumulated on its surface, and when the air passes through the air delivery pipe 401, it will impact the impeller 405, causing the impeller 405 to start rotating. The impeller 405 can drive the scraper 404 to rotate synchronously through the transmission rod 403. As the scraper 404 rotates, the impurities accumulated on the filter 402 can be scraped out from the collection tank 406, so that the impurities fall into the collection box 407, ensuring that the filter 402 can be kept clean continuously, avoiding blockage caused by the accumulation of impurities, and improving the practicality of the device.

[0039] Reference Figure 1 、 Figure 7 and Figure 8 The control mechanism 3 also includes a box door 408, which is arranged at the lower middle part of the right side of the collection box 407. The upper and lower sides of the front end of the right wall of the box door 408 are fixedly connected with hinges 409. The box door 408 can be easily opened by the hinges 409. The box door 408 is rotatably connected to the collection box 407 through the hinges 409. The control mechanism 3 also includes a connecting port 410. The connecting port 410 is connected to the right end of the air delivery pipe 401. The connecting port 410 facilitates connecting the air delivery pipe 401 to external equipment. The inner size of the air delivery pipe 401 matches the size of the filter 402.

[0040] Specifically, the box door 408 can be easily opened through the hinge 409 to clean the impurities in the collection box 407, and the air delivery tube 401 can be connected to the external device using the connection port 410. The inner size of the air delivery tube 401 matches the size of the filter 402, so that there will be no gap between the filter 402 and the air delivery tube 401.

[0041] Reference Figure 1 、 Figure 2 and Figure 5 The control mechanism 3 also includes a slide groove 313. The two slide grooves 313 are respectively opened on the front and rear sides of the hollow block 302. The front and rear sides of the slider 310 are respectively slidably connected to the corresponding slide grooves 313. The slide grooves 313 can limit the movement of the slider 310. The left and right sides of the top of the housing 1 are connected to the gas outlet 6. The gas outlet 6 is convenient for discharging the reacted gas. The outer tops of the two gas outlets 6 are provided with connecting threads 7.

[0042] Specifically, the slide groove 313 can limit the movement of the slider 310, so that when the threaded rod 309 rotates, the slider 310 can move, and the air outlet 6 facilitates the discharge of the reacted gas from the device, and the connecting thread 7 facilitates the connection of the air outlet 6 with the external exhaust device.

[0043] Working principle: When the hydrogen fuel cell is overloaded during use, the motor 209 will start and drive the support column 210 to rotate, the support column 210 will drive the push plate 211 to rotate, and the push plate 211 will drive the movable column 208 to move. When the movable column 208 moves, it can push the support plate 206 forward through the groove 207. The movable plate 204 will then drive the protective plug plate 205 forward, thereby inserting it between the multiple catalyst layers 203, isolating the transfer of protons, and immediately stopping the power generation of the hydrogen fuel cell, so that the hydrogen fuel cell will not be damaged due to overload;

[0044] When the power generation power of the hydrogen fuel cell needs to be adjusted, the motor 308 drives the threaded rod 309 to rotate. When the threaded rod 309 rotates, the slider 310 moves along the threaded rod 309 and drives the two support blocks 311 to move synchronously. When the support block 311 moves, it can push the rotating shaft 307 to move through the connecting rod 312. When the rotating shaft 307 moves, it drives the support plate 306 to rotate. At this time, the two support plates 306 will respectively drive the hollow tube 303 and the rotating rod 314 to rotate relative to each other. The hollow tube 303 and the rotating rod 314 will respectively drive the first valve body 304 and the second valve body 305 to rotate. By controlling the angle between the first valve body 304 and the second valve body 305, the flow rate of hydrogen entering the device can be conveniently controlled, thereby controlling the power generation power of the hydrogen fuel cell.

[0045] When the device is used, air can be transported into the device through the air delivery pipe 401. During this process, the filter 402 can filter the air entering the device, and impurities will accumulate on the filter 402. When the air passes through the air delivery pipe 401, it will impact the impeller 405, causing the impeller 405 to start rotating. When the impeller 405 rotates, the transmission rod 403 can drive the scraper 404 to rotate, thereby scraping the impurities accumulated on the filter 402 out of the collection tank 406, and causing the impurities to fall into the collection box 407, so that the filter 402 will not be blocked due to the accumulation of impurities.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen fuel cell power generation system overload protection device, comprising a housing (1), characterized in that: The rear side of the housing (1) is fixedly connected to a box body (5), the inner side of the box body (5) is provided with a protection mechanism (2), the protection mechanism (2) is used to conveniently provide overload protection for the hydrogen fuel cell, the left side of the housing (1) is provided with a control mechanism (3), the control mechanism (3) is used to conveniently control the power of the hydrogen fuel cell, and the right side of the housing (1) is provided with a filter mechanism (4), the filter mechanism (4) is used to conveniently filter the air entering the device; The protection mechanism (2) includes an electrode plate (201), two electrode plates (201) are fixedly connected to the left and right ends of the inner shell (1), respectively, the left and right sides of the inner shell (1) are fixedly connected with a microporous layer (202), the middle part of the inner side of the shell (1) is fixedly connected with a plurality of catalytic layers (203) at equal intervals, the inner side of the box (5) is slidably connected with a movable plate (204), the left and right sides of the front wall of the movable plate (204) are fixedly connected with a protection plug plate (205), the front ends of the two protection plug plates (205) are sequentially passed through the box (5) and the shell (1), the rear side of the movable plate (204) is provided with a moving component, the The movable assembly includes a support plate (206), the support plate (206) is fixedly connected to the rear side of the movable plate (204), a groove (207) is provided on the outer side of the support plate (206), and a movable column (208) is slidably connected to the inner side of the groove (207), a motor (209) is fixedly connected to the bottom of the rear side of the right wall of the box (5), an output end of the motor (209) passes through the box (5) and is fixedly connected to the support column (210), and the left and right ends of the outer sides of the support column (210) are fixedly connected to push plates (211), and the tops of the adjacent sides of the two push plates (211) are rotatably connected to the left and right ends of the movable column (208) respectively.

2. The hydrogen fuel cell power generation system overload protection device according to claim 1, characterized in that: The control mechanism (3) includes a hydrogen delivery pipe (301), the hydrogen delivery pipe (301) is connected to the middle of the left side of the shell (1), the right end of the hydrogen delivery pipe (301) sequentially penetrates the shell (1) and the left electrode plate (201), the top of the hydrogen delivery pipe (301) is fixedly connected to a hollow block (302), the bottom end of the inner part of the hollow block (302) is rotatably connected to a hollow pipe (303), the bottom end of the hollow pipe (303) sequentially penetrates the hollow block (302) and the hydrogen delivery pipe (301). 1) and is fixedly connected to a first valve body (304); the inner top end of the hollow block (302) is rotatably connected to a rotating rod (314); the bottom end of the rotating rod (314) passes through the hollow tube (303) and is fixedly connected to a second valve body (305); the outer top ends of the hollow tube (303) and the rotating rod (314) are fixedly connected to a support plate (306); adjacent sides of the two support plates (306) are fixedly connected to a rotating shaft (307); and a rotating assembly is provided inside the hollow block (302).

3. The overload protection device for a hydrogen fuel cell power generation system according to claim 1, characterized in that: The filtering mechanism (4) comprises an air delivery pipe (401), the air delivery pipe (401) being connected to the right side of the housing (1), the left end of the air delivery pipe (401) sequentially passing through the housing (1) and the right side electrode plate (201), a filter screen (402) being fixedly connected to the middle portion of the inner side of the air delivery pipe (401), a transmission rod (403) being rotatably connected to the right side of the filter screen (402), an impeller (405) being fixedly connected to the right end of the transmission rod (403), a scraper (404) being fixedly connected to the left side of the outer wall of the transmission rod (403), and a collecting assembly being provided at the bottom of the air delivery pipe (401).

4. The hydrogen fuel cell power generation system overload protection device according to claim 2, characterized in that: The rotating assembly includes a motor (308), the motor (308) is fixedly connected to the right side of the hollow block (302), the output end of the motor (308) passes through the hollow block (302) and is fixedly connected to a threaded rod (309), the outer side of the threaded rod (309) is threadedly connected to a slider (310), the front and rear ends of the left side of the slider (310) are fixedly connected to a support block (311), the left sides of the two support blocks (311) are both rotatably connected to a connecting rod (312), and the left ends of the two connecting rods (312) are respectively rotatably connected to the corresponding rotating shaft (307).

5. The hydrogen fuel cell power generation system overload protection device according to claim 3, characterized in that: The collection assembly comprises a collection trough (406), the collection trough (406) being opened at the bottom of the air delivery pipe (401), and a collection box (407) being fixedly connected to the middle portion of the outer side of the air delivery pipe (401).

6. The hydrogen fuel cell power generation system overload protection device according to claim 5, characterized in that: The control mechanism (3) further comprises a box door (408), the box door (408) being arranged at the lower middle portion of the right side of the collection box (407), and hinges (409) being fixedly connected to the upper and lower sides of the front end of the right wall of the box door (408), and the box door (408) is rotatably connected to the collection box (407) via the hinges (409).

7. The hydrogen fuel cell power generation system overload protection device according to claim 3, characterized in that: The control mechanism (3) further comprises a connection port (410), wherein the connection port (410) is connected to the right end of the air delivery pipe (401), and the inner size of the air delivery pipe (401) matches the size of the filter screen (402).

8. The hydrogen fuel cell power generation system overload protection device according to claim 4, characterized in that: The control mechanism (3) further comprises a slide groove (313), wherein two slide grooves (313) are respectively provided on the front and rear sides of the hollow block (302), and the front and rear sides of the slider (310) are respectively slidably connected to the corresponding slide grooves (313).

9. The hydrogen fuel cell power generation system overload protection device according to claim 1, characterized in that: The left and right sides of the top of the housing (1) are both connected with air outlets (6), and the outer tops of the two air outlets (6) are both provided with connecting threads (7).

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