Hydrogen leakage alarm device for hydrogen storage cylinder

Abstract

The utility model provides a hydrogen leakage alarm device for a hydrogen storage cylinder, which comprises a bottom frame, two bearing tables mounted on the bottom frame, a plurality of gas storage cylinders placed on the two bearing tables, a monitoring box covering the bottom frame and the gas storage cylinders, and a cover plate connected to the bottom frame and used for sealing the monitoring box, the hydrogen leakage alarm device comprises a monitoring box, a cover plate arranged on the monitoring box, a sealing assembly and a positioning assembly arranged on the monitoring box and the cover plate, a leakage alarm assembly installed in the monitoring box, and a guide assembly arranged on the monitoring box and the bottom frame. And by arranging the leakage alarm assembly, the comprehensiveness of monitoring air in the monitoring box is guaranteed, hydrogen leakage can be rapidly monitored when any position of a plurality of gas storage bottles has hydrogen leakage, an alarm is given out, and timely alarm is guaranteed, so that the processing speed of workers is effectively increased, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen leakage alarm, in particular to a hydrogen leakage alarm device for a hydrogen storage cylinder. Background Art

[0002] Hydrogen is a clean and efficient secondary energy source. As a tool for storing hydrogen, the safety of hydrogen cylinders is very important for the storage and application of hydrogen. With the development of hydrogen energy, the storage and transportation of hydrogen has gradually become an important link between upstream hydrogen production and downstream hydrogen utilization. However, in the process of hydrogen storage and transportation, leakage has become a key factor restricting safe storage and transportation. The prior art lacks a hydrogen leakage alarm device with good stability designed for hydrogen storage tanks. Therefore, when a collision occurs during storage and transportation or a hydrogen cylinder leaks, personnel cannot be informed of the hydrogen leakage in time. On the one hand, it will cause hydrogen loss. On the other hand, in some cases, gas leakage may even cause serious safety accidents.

[0003] A hydrogen leakage alarm device for a hydrogen storage tank with publication number CN218381453U includes a hydrogen storage tank, a tank seat is provided at the bottom end of the hydrogen storage tank, a connecting seat is provided on one side of the tank seat, a quick connection assembly is provided at one end of the connecting seat close to the gas injection port of the hydrogen storage tank; a connecting rod is provided at one end of the quick connection assembly away from the connecting seat, and an end of the connecting rod away from the quick connection assembly extends to the side of the gas injection port of the hydrogen storage tank and is connected to a hydrogen detection mechanism.

[0004] The utility model has high stability in use, is suitable for hydrogen concentration detection of hydrogen storage tanks, and can detect hydrogen leakage in time and then alarm.

[0005] However, the above patents still have some shortcomings:

[0006] When the above-mentioned device is in use, the hydrogen detection mechanism can only detect the hydrogen concentration at the gas injection port of the storage tank, so that only when a leak occurs in the output or input pipeline can it be quickly detected by the hydrogen detection mechanism. If an abnormal leak occurs in the tank body, the hydrogen detection mechanism will detect an abnormal hydrogen content in the air, indicating that the hydrogen leakage has been excessive, which will create a major safety hazard. Utility Model Content

[0007] The utility model aims to provide a hydrogen leakage alarm device for a hydrogen storage cylinder to solve the above problems.

[0008] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a hydrogen leakage alarm device for hydrogen storage cylinders, comprising: a bottom frame, two bearing platforms installed on the bottom frame, a plurality of gas storage cylinders placed on the two bearing platforms, a monitoring box covering the outside of the bottom frame and the plurality of gas storage cylinders, a cover plate connected to the bottom frame, a sealing component and a positioning component arranged on the monitoring box and the cover plate, a leakage alarm component installed in the monitoring box, and a guide component arranged on the monitoring box and the bottom frame, wherein

[0009] The sealing assembly is suitable for sealingly connecting the cover plate to the monitoring box;

[0010] The positioning assembly is suitable for supporting a plurality of gas cylinders to be stably placed in the monitoring box;

[0011] The leakage alarm component is suitable for real-time detection of the air in the monitoring box;

[0012] The guide assembly is suitable for assisting the bottom frame to drive a plurality of gas storage cylinders into the monitoring box.

[0013] Furthermore, the leakage alarm assembly includes a monitoring cover fixedly connected to the monitoring box, an air intake cavity, an installation cavity and an exhaust cavity provided in the monitoring cover, an air pump provided in the middle of the installation cavity, a buzzer installed on the outer wall of the monitoring box, and a hydrogen sensor provided in the exhaust cavity;

[0014] The air inlet end and the air outlet end of the air pump are communicated with the air inlet cavity and the air outlet cavity respectively, and the hydrogen sensor is arranged at the air outlet end of the air pump.

[0015] Furthermore, the leakage alarm assembly also includes a plurality of gas supply pipes and a plurality of exhaust pipes installed in the monitoring box through clamps;

[0016] One end of a plurality of the gas delivery pipes is connected to the gas inlet cavity at equal intervals, and the other end of the plurality of the gas delivery pipes extends to one side of a plurality of the gas storage bottles;

[0017] One end of a plurality of the exhaust pipes is connected to the exhaust cavity at equal intervals, and one end of a plurality of the exhaust pipes extends to the other side of a plurality of the gas storage bottles;

[0018] The plurality of gas delivery pipes correspond one to one with the plurality of exhaust pipes.

[0019] Further, the sealing assembly includes two mounting seats symmetrically connected to the outer wall of the monitoring box, a mounting plate symmetrically connected to the cover plate, two fixing screws respectively screwed on the two mounting seats, screw holes respectively opened on the two mounting plates, and a sealing gasket installed on the cover plate;

[0020] The sealing pad abuts against the monitoring box;

[0021] The two mounting plates are respectively fitted and slidably inserted into the two mounting seats, wherein

[0022] The two fixing screws are rotated respectively, which is suitable for supporting the head ends of the two fixing screws to enter the screw holes.

[0023] Furthermore, a hydrogen leakage alarm device for a hydrogen storage cylinder also includes an air inlet pipe and an air outlet pipe respectively connected to the left and right sides of the monitoring box, and a sealing cover spirally mounted on the air inlet pipe and the air outlet pipe;

[0024] Furthermore, the positioning assembly includes a plurality of support frames respectively mounted on the cover plate and the inner wall of the monitoring box and corresponding to the plurality of gas cylinders, and a plurality of rubber rings connected to the plurality of support frames;

[0025] The plurality of rubber rings are respectively against the plurality of gas storage cylinders.

[0026] Furthermore, the guide assembly includes two transverse shafts fixedly installed in the bottom frame, a plurality of guide seats respectively rotatably connected to the outside of the two transverse shafts, fixedly connected to the inner wall of the monitoring box and corresponding to the plurality of gas cylinders, and guide wheels installed at the bottom of the plurality of guide seats;

[0027] The plurality of guide wheels are respectively against the plurality of gas storage cylinders.

[0028] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0029] The hydrogen leakage alarm device for hydrogen storage cylinders can seal the cover plate to the monitoring box through the provided sealing component, so that the plurality of gas storage cylinders are sealed in the monitoring box. Furthermore, once a leakage problem occurs in the plurality of gas storage cylinders in the sealed environment, the provided leakage alarm component can effectively monitor and ensure the monitoring effect of hydrogen leakage. With the cooperation of the positioning component, the plurality of gas storage cylinders can be stably fixed in the monitoring box, avoiding collision and potential safety hazards when the plurality of gas storage cylinders are transported.

[0030] The hydrogen leakage alarm device of the hydrogen storage cylinder is provided with a leakage alarm component. The air pump can draw the air at the air inlet ends of several gas pipes into the exhaust chamber, and then transport it to the exhaust chamber for monitoring by the hydrogen sensor. Finally, the air is discharged through the air outlet ends of several gas pipes, so as to cyclically monitor the air in the monitoring box to ensure the comprehensiveness of the air monitoring in the monitoring box. When hydrogen leakage occurs at any position of several gas storage cylinders, it can be quickly detected and an alarm can be sounded, thereby effectively improving the processing speed of the staff and reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Figure 1 Shows a stereogram of the utility model;

[0033] Figure 2 A perspective view of the utility model in another state is shown;

[0034] Figure 3 A partial top perspective view of the utility model is shown;

[0035] Figure 4 A partial bottom-up stereogram of the present invention is shown;

[0036] Figure 5 A partial cutaway view of the present invention is shown.

[0037] In the picture

[0038] 1. Bottom frame; 2. Carrying platform; 3. Gas cylinder; 4. Monitoring box; 5. Cover plate; 6. Sealing assembly; 7. Positioning assembly; 8. Leakage alarm assembly; 9. Guide assembly; 10. Monitoring cover; 11. Air inlet cavity; 12. Installation cavity; 13. Exhaust cavity; 14. Air pump; 15. Buzzer; 16. Hydrogen sensor; 17. Gas pipeline; 18. Exhaust pipe; 19. Mounting seat; 20. Mounting plate; 21. Fixing screw; 22. Screw hole; 23. Sealing pad; 24. Support frame; 25. Rubber ring; 26. Horizontal axis; 27. Movable ring; 28. Guide seat; 29. ​​Guide wheel; 30. Air inlet pipe; 31. Air outlet pipe; 32. Sealing cover. DETAILED DESCRIPTION

[0039] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0040] See also Figure 1 , Figure 1 Shows a three-dimensional diagram of the utility model; please refer to Figure 2 , Figure 2 Shows a three-dimensional view of the utility model in another state; please refer to Figure 3 , Figure 3 A partial top view of the present invention is shown; see Figure 4 , Figure 4 A partial bottom-up stereogram of the present invention is shown; see Figure 5 , Figure 5 Shows a partial cutaway view of the utility model; Figure 1-5As shown, a hydrogen leakage alarm device for a hydrogen storage cylinder comprises: a bottom frame 1, two bearing platforms 2 installed on the bottom frame 1, a plurality of gas storage cylinders 3 placed on the two bearing platforms 2, a monitoring box 4 covering the outside of the bottom frame 1 and the plurality of gas storage cylinders 3, a cover plate 5 connected to the bottom frame 1, a sealing component 6 and a positioning component 7 arranged on the monitoring box 4 and the cover plate 5, a leakage alarm component 8 installed in the monitoring box 4, and a guide component 9 arranged on the monitoring box 4 and the bottom frame 1, wherein

[0041] The sealing assembly 6 is suitable for sealingly connecting the cover plate 5 to the monitoring box 4;

[0042] The positioning assembly 7 is suitable for supporting a plurality of gas cylinders 3 to be stably placed in the monitoring box 4;

[0043] The leakage alarm component 8 is suitable for real-time detection of the air in the monitoring box 4;

[0044] The guide assembly 9 is suitable for assisting the bottom frame 1 to drive the gas cylinders 3 into the monitoring box 4. When storing and transporting the gas cylinders 3, the gas cylinders 3 can be placed on the bottom frame 1 through the two bearing platforms 2 and then put into the monitoring box 4. The guide assembly 9 can ensure the smooth movement of the gas cylinders 3 and the bottom frame 1, making it easier for the staff to take and put the gas cylinders 3. Under the action of the positioning assembly 7, the stability of the gas cylinders 3 during transportation is ensured, and the safety hazards of the gas cylinders 3 due to collision or shaking during transportation are effectively prevented. After the gas cylinders 3 are placed in the monitoring box 4, the sealing assembly 6 can complete the connection and sealing between the cover plate 5 and the monitoring box 4, thereby ensuring the relative sealing inside the monitoring box 4. It can effectively prevent hydrogen leakage from occurring in several gas cylinders 3, which would affect the environment outside the monitoring box 4, and can ensure that the leakage alarm component 8 is effective in monitoring the air in the monitoring box 4; at the same time, when the leakage alarm component 8 is in use, the air pump 14 can draw air at the air inlet ends of several gas pipes 17 into the exhaust chamber 13, and then transport the air to the exhaust chamber 13, to be monitored by the hydrogen sensor 16, and finally discharged through the air outlet ends of several gas pipes 17, so as to cyclically monitor the air in the monitoring box 4, and ensure the comprehensiveness of the air monitoring in the monitoring box 4. When hydrogen leakage occurs at any position of the several gas cylinders 3, it can be quickly detected and an alarm can be sounded, thereby effectively improving the processing speed of the staff and reducing safety hazards.

[0045] Optionally, the leakage alarm assembly 8 includes a monitoring cover 10 fixedly connected to the monitoring box 4, an air intake cavity 11, an installation cavity 12 and an exhaust cavity 13 provided in the monitoring cover 10, an air pump 14 arranged in the middle of the installation cavity 12, a buzzer 15 installed on the outer wall of the monitoring box 4, and a hydrogen sensor 16 arranged in the exhaust cavity 13;

[0046] The air inlet and outlet ends of the air pump 14 are connected to the air inlet chamber 11 and the air exhaust chamber 13 respectively. The hydrogen sensor 16 is arranged at the air outlet end of the air pump 14. When a plurality of gas cylinders 3 are placed in the monitoring box 4 for storage, the arranged air pump 14 can real-time let the air in the monitoring box 4 enter the air inlet chamber 11 and then pass it to the air exhaust chamber 13 to blow toward the hydrogen sensor 16, so that the hydrogen sensor 16 monitors the air in the monitoring box 4. When a plurality of gas cylinders 3 have hydrogen leakage, the hydrogen sensor 16 will detect that the hydrogen concentration in the monitoring box 4 has reached a preset critical value, which indicates that hydrogen leakage may occur, so that the hydrogen sensor 16 will transmit a signal to an external controller, so that the controller controls the buzzer 15 to give an audible and visual alarm to remind personnel to pay attention, and remind the staff to come and check in time to avoid a bigger accident.

[0047] Optionally, the leakage alarm assembly 8 further includes a plurality of gas supply pipes 17 and a plurality of exhaust pipes 18 installed in the monitoring box 4 through clamps;

[0048] One end of the plurality of gas delivery pipes 17 is connected to the gas inlet cavity 11 at equal intervals, and the other end of the plurality of gas delivery pipes 17 extends to one side of the plurality of gas storage bottles 3;

[0049] One end of a plurality of the exhaust pipes 18 is connected to the exhaust cavity 13 at equal intervals, and one end of a plurality of the exhaust pipes 18 extends to the other side of a plurality of the gas storage bottles 3;

[0050] The plurality of gas delivery pipes 17 correspond to the plurality of exhaust pipes 18 one by one. When the air pump 14 draws the air in the monitoring box 4 to the hydrogen sensor 16 so that the hydrogen sensor 16 detects the air in the monitoring box 4, the plurality of gas delivery pipes 17 are provided so that a wide range of air in the monitoring box 4 can enter the air inlet cavity 11 and be transported to the exhaust cavity 13 by the air pump 14 for detection by the hydrogen sensor 16, thereby ensuring the efficiency of the hydrogen sensor 16 in detecting the air in the monitoring box 4. The detected air passes through the plurality of exhaust pipes 18. The air is discharged through the air pipe 31, and at the same time, the air inlet ends of the plurality of air supply pipes 17 correspond one-to-one with the air outlet ends of the plurality of exhaust pipes 18, so that the air discharged from the plurality of exhaust pipes 18 can blow on the surfaces of the plurality of gas cylinders 3, so that the air at the bottle bodies of the plurality of gas cylinders 3 can be effectively absorbed by the plurality of air supply pipes 17, thereby further improving the detection accuracy of the hydrogen sensor 16 for hydrogen leakage from the plurality of gas cylinders 3. When a leak occurs in the gas cylinder 3, personnel can pay attention to the hydrogen leakage at the first time, effectively avoiding the loss caused by the leakage process and reducing safety hazards.

[0051] Optionally, the sealing assembly 6 includes two mounting seats 19 symmetrically connected to the outer wall of the monitoring box 4, a mounting plate 20 symmetrically connected to the cover plate 5, two fixing screws 21 respectively screwed on the two mounting seats 19, screw holes 22 respectively opened on the two mounting plates 20, and a sealing gasket 23 installed on the cover plate 5;

[0052] The sealing pad 23 abuts against the monitoring box 4;

[0053] The two mounting plates 20 are respectively fitted and slidably inserted into the two mounting seats 19, wherein

[0054] The two fixing screws 21 are rotated separately to support the head ends of the two fixing screws 21 to enter the screw holes 22. After the gas cylinders 3 are assembled in the monitoring box 4 through the positioning assembly 7 and the sealing gasket 23 on the cover plate 5 is against the monitoring box 4, the two fixing screws 21 can be rotated to make the head ends of the two fixing screws 21 approach the monitoring box 4 until the ends of the two fixing screws 21 are respectively threaded into the two threaded holes, so that the cover plate 5 and the monitoring box 4 can be firmly connected. The provided sealing gasket 23 can seal the connection between the cover plate 5 and the monitoring box 4, thereby maintaining the relative sealing of the inside of the monitoring box 4, and preventing the outside air from entering the inside of the monitoring box 4 when the gas cylinders 3 leak, thereby reducing the concentration of hydrogen in the monitoring box 4 and affecting the detection effect of the leakage alarm assembly 8.

[0055] Optionally, a hydrogen leakage alarm device for a hydrogen storage cylinder also includes an inlet pipe 30 and an outlet pipe 31 respectively connected to the left and right sides of the monitoring box 4, and a sealing cover 32 spirally installed on the inlet pipe 30 and the outlet pipe 31. When the hydrogen in the gas storage cylinder 3 leaks and the staff is warned with the cooperation of the leakage alarm component 8, the staff can respectively rotate the two sealing covers 32 to open the inlet pipe 30 and the outlet pipe 31, so that the interior of the monitoring box 4 can be connected to the outside through the inlet pipe 30 and the outlet pipe 31. At this time, the staff can extract and store the leaked hydrogen in the monitoring box 4 through the outlet pipe 31, thereby avoiding the situation where the concentration of hydrogen in the monitoring box 4 is too high due to leakage when the sealing component 6 is controlled to open the monitoring box 4, thereby improving the safety of the staff when handling the gas storage cylinder 3.

[0056] Optionally, the positioning assembly 7 includes a plurality of support frames 24 respectively mounted on the cover plate 5 and the inner wall of the monitoring box 4 and corresponding to the plurality of gas cylinders 3, and a plurality of rubber rings 25 connected to the plurality of support frames 24;

[0057] The rubber rings 25 are respectively abutted against the gas cylinders 3, and then cooperated with the guide assembly 9 to take the bottom frame 1 and the supporting platform 2 out of the monitoring box 4, and then the gas cylinders 3 can be placed on the two supporting platforms 2 first, and then the gas cylinders 3 are pushed until one end of the gas cylinders 3 is respectively abutted against the rubber rings 25 on the cover plate 5, so that the support frames 24 on the cover plate 5 can respectively play a preliminary restrictive role on the gas cylinders 3, and when the bottom frame 1, the two supporting platforms 2 and the gas cylinders 3 are pushed into the monitoring box 4, the other ends of the gas cylinders 3 will respectively abut against the rubber rings 25 in the monitoring box 4, so that the support frames 24 in the monitoring box 4 can further restrict the gas cylinders 3, until the cover plate 5 and the monitoring box 4 are sealed and connected by the sealing assembly 6, so that the stability of the gas cylinders 3 in the monitoring box 4 can be guaranteed, and the safety hazards when the gas cylinders 3 are transported can be reduced.

[0058] Optionally, the guide assembly 9 includes two transverse shafts 26 fixedly installed in the bottom frame 1, movable rings 27 rotatably connected to the outside of the two transverse shafts 26, a plurality of guide seats 28 fixedly connected to the inner wall of the monitoring box 4 and corresponding to the plurality of gas cylinders 3, and guide wheels 29 installed at the bottom of the plurality of guide seats 28;

[0059] The guide wheels 29 are respectively against the gas cylinders 3. When taking and placing the gas cylinders 3 in the monitoring box 4, the staff can pull the cover plate 5 to drive the bottom frame 1 to move in the monitoring box 4 and drive the gas cylinders 3 to move synchronously. At this time, the two transverse axes 26 and the movable rings 27 are coordinated to ensure the smooth movement of the bottom frame 1 in the monitoring box 4. Under the cooperation of the guide seats 28 and the guide wheels 29, when the gas cylinders 3 move, the guide wheels 29 roll synchronously on the surface of the gas cylinders 3, which can increase the stability of the gas cylinders 3 in cooperating with the bottom frame 1 and the bearing platform 2, so that the staff can easily take and place the gas cylinders 3 from the monitoring box 4. After the gas cylinders 3 are placed in the monitoring box 4, the guide wheels 29 can also limit the gas cylinders 3, further improving the stability of the gas cylinders 3 in the monitoring box 4 and improving the safety of the gas cylinders 3 during transportation.

[0060] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydrogen leakage alarm device for a hydrogen storage cylinder, characterized in that: include: A bottom frame (1), two supporting platforms (2) mounted on the bottom frame (1), a plurality of gas cylinders (3) placed on the two supporting platforms (2), a monitoring box (4) arranged outside the bottom frame (1) and the plurality of gas cylinders (3), a cover plate (5) connected to the bottom frame (1), a sealing component (6) and a positioning component (7) arranged on the monitoring box (4) and the cover plate (5), a leakage alarm component (8) installed in the monitoring box (4), and a guide component (9) arranged on the monitoring box (4) and the bottom frame (1), wherein The sealing assembly (6) is suitable for sealingly connecting the cover plate (5) to the monitoring box (4); The positioning assembly (7) is suitable for supporting a plurality of gas cylinders (3) to be stably placed in the monitoring box (4); The leakage alarm component (8) is suitable for real-time detection of the air in the monitoring box (4); The guide assembly (9) is suitable for assisting the bottom frame (1) in driving a plurality of gas storage cylinders (3) into the monitoring box (4).

2. A hydrogen leakage alarm device for a hydrogen storage cylinder as claimed in claim 1, characterized in that: The leakage alarm assembly (8) comprises a monitoring cover (10) fixedly connected to the monitoring box (4), an air intake chamber (11), a mounting chamber (12) and an exhaust chamber (13) provided in the monitoring cover (10), an air pump (14) arranged in the middle of the mounting chamber (12), a buzzer (15) installed on the outer wall of the monitoring box (4), and a hydrogen sensor (16) arranged in the exhaust chamber (13); The air inlet end and the air outlet end of the air pump (14) are respectively connected to the air inlet cavity (11) and the air outlet cavity (13), and the hydrogen sensor (16) is arranged at the air outlet end of the air pump (14).

3. A hydrogen leakage alarm device for a hydrogen storage cylinder as claimed in claim 2, characterized in that: The leakage alarm assembly (8) further comprises a plurality of gas supply pipes (17) and a plurality of exhaust pipes (18) installed in the monitoring box (4) via clamps; One end of the plurality of gas delivery pipes (17) is connected to the gas inlet cavity (11) at equal intervals, and the other end of the plurality of gas delivery pipes (17) extends to one side of the plurality of gas storage bottles (3); One end of a plurality of the exhaust pipes (18) is connected to the exhaust cavity (13) at equal intervals, and one end of a plurality of the exhaust pipes (18) extends to the other side of a plurality of the gas storage bottles (3); The plurality of gas delivery pipes (17) correspond one to one with the plurality of exhaust pipes (18).

4. A hydrogen leakage alarm device for a hydrogen storage cylinder as claimed in claim 3, characterized in that: The sealing assembly (6) comprises two mounting seats (19) symmetrically connected to the outer wall of the monitoring box (4), a mounting plate (20) symmetrically connected to the cover plate (5), two fixing screws (21) respectively screwed on the two mounting seats (19), screw holes (22) respectively opened on the two mounting plates (20), and a sealing gasket (23) mounted on the cover plate (5); The sealing pad (23) abuts against the monitoring box (4); The two mounting plates (20) are respectively fitted and slidably inserted into the two mounting seats (19), wherein The two fixing screw rods (21) are rotated respectively, so as to support the head ends of the two fixing screw rods (21) to enter the screw holes (22).

5. A hydrogen leakage alarm device for a hydrogen storage cylinder as claimed in claim 1, characterized in that ， A hydrogen gas storage cylinder hydrogen leakage alarm device further comprises an air inlet pipe (30) and an air outlet pipe (31) respectively connected to the left and right sides of the monitoring box (4), and a sealing cover (32) screwed onto the air inlet pipe (30) and the air outlet pipe (31).

6. A hydrogen leakage alarm device for a hydrogen storage cylinder as claimed in claim 4, characterized in that: The positioning assembly (7) comprises a plurality of support frames (24) respectively mounted on the cover plate (5) and the inner wall of the monitoring box (4) and corresponding to the plurality of gas cylinders (3), and a plurality of rubber rings (25) connected to the plurality of support frames (24); The plurality of rubber rings (25) are respectively abutted against the plurality of gas storage bottles (3).

7. A hydrogen leakage alarm device for a hydrogen storage cylinder as claimed in claim 1, characterized in that: The guide assembly (9) comprises two transverse shafts (26) fixedly mounted in the bottom frame (1), a plurality of guide seats (28) fixedly connected to the inner wall of the monitoring box (4) and corresponding to the plurality of gas cylinders (3) in a one-to-one manner, and a guide wheel (29) mounted at the bottom of the plurality of guide seats (28); The plurality of guide wheels (29) respectively abut against the plurality of gas storage cylinders (3).

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