Explosion-proof device of hydrogen equipment

Abstract

The utility model relates to an explosion-proof device, in particular to an explosion-proof device of hydrogen equipment. The explosion-proof device of the hydrogen equipment comprises an explosion-proof box body used for installing the hydrogen equipment, a buffer space is formed between the hydrogen equipment and the explosion-proof box body, the explosion-proof device of the hydrogen equipment further comprises a sealing door, a hydrogen inlet pipe and a hydrogen outlet pipe, and the sealing door is connected with the explosion-proof box body in a rotating mode. And the hydrogen inlet pipe, the hydrogen outlet pipe and the hydrogen diffusing pipe are communicated with the hydrogen equipment. When the hydrogen in the explosion-proof box body reaches the lower limit of the concentration alarm value, the control unit controls the hydrogen equipment to shut down to open the electromagnetic valve on the hydrogen diffusing pipe, so that the residual hydrogen in the pipeline of the hydrogen equipment is emptied, and when the hydrogen concentration sensor detects that the hydrogen reaches the upper limit of the concentration alarm value, the control unit controls the hydrogen equipment to shut down to open the electromagnetic valve on the hydrogen diffusing pipe; and a strong exhaust fan arranged on the nitrogen diffusion pipeline is further turned on to carry out forced diffusion.

Description

Technical Field

[0001] The utility model relates to an explosion-proof device, in particular to an explosion-proof device for hydrogen equipment. Background Art

[0002] Hydrogen is a colorless, odorless, highly flammable and insoluble gas at room temperature and pressure. Hydrogen equipment is mainly equipment for hydrogen production and hydrogenation. In the transportation and working scenarios of hydrogen equipment, in order to prevent hydrogen from leaking out of the hydrogen equipment and being ignited into the air and causing an explosion, certain explosion-proof safety treatments are required to reduce hydrogen costs and safety hazards.

[0003] The patent with the patent authorization announcement number CN210918360U discloses a positive pressure explosion-proof container. The patent realizes pressure relief by automatically opening the movable cover and buffers the pressure by the blocking plate and spring inside the box to prevent damage to the box caused by excessive pressure. However, the patent still has shortcomings in actual use. The patent only performs explosion-proof treatment in the event of an explosion through physical means. When hydrogen leaks, it cannot force the release of hydrogen, thereby failing to achieve the purpose of explosion-proof from the root.

[0004] Therefore, it is urgent to design an explosion-proof device that can forcibly release hydrogen equipment. Utility Model Content

[0005] In order to overcome the shortcomings of the above patent that only physical means are used to perform explosion-proof treatment in the event of an explosion, and hydrogen cannot be promptly blocked from contacting with air or explosion elements of an electric fire source when hydrogen leaks, thereby failing to achieve effective explosion protection, the technical problem to be solved is: to provide an explosion-proof device for hydrogen equipment that can block the contact between hydrogen and air or explosion elements of an electric fire source and achieve effective explosion protection.

[0006] The technical solution of the utility model is: an explosion-proof device for hydrogen equipment, comprising an explosion-proof box for installing the hydrogen equipment, a buffer space is formed between the hydrogen equipment and the explosion-proof box, and also comprises a sealing door, a hydrogen inlet pipe, a hydrogen outlet pipe, a hydrogen release pipe, a nitrogen inlet pipe and a nitrogen release pipe;

[0007] The sealing door is rotatably connected to the explosion-proof box;

[0008] The hydrogen inlet pipe, the hydrogen outlet pipe and the hydrogen release pipe are connected to the hydrogen equipment, and the hydrogen release pipe outlet passes through the top of the explosion-proof box;

[0009] The nitrogen inlet pipe is in communication with the buffer space;

[0010] The nitrogen release pipe is arranged on the top of the explosion-proof box and is communicated with the buffer space.

[0011] As a preferred technical solution of the utility model, it further includes a control unit, a hydrogen concentration sensor, a gas pressure sensor and a temperature sensor, and the hydrogen concentration sensor, the gas pressure sensor and the temperature sensor are all signal-connected to the control unit.

[0012] As a preferred technical solution of the utility model, the hydrogen release pipe and the nitrogen release pipe are provided with solenoid valves, and the solenoid valves are connected to the control unit by signal.

[0013] As a preferred technical solution of the present invention, an explosion-proof touch screen is arranged outside the explosion-proof box, and the explosion-proof touch screen is signal-connected to the control unit.

[0014] As a preferred technical solution of the utility model, it also includes a nitrogen inlet pipe and a hydrogen inlet pipe, and a connecting valve is arranged between the nitrogen inlet pipe and the hydrogen inlet pipe.

[0015] As a preferred technical solution of the utility model, it also includes a water inlet pipe and a water return pipe, and the water inlet pipe and the water return pipe are connected to the hydrogen equipment.

[0016] As a preferred technical solution of the utility model, it includes a manual nitrogen discharge port, and the manual nitrogen discharge port is connected to the buffer space.

[0017] As a preferred technical solution of the utility model, the sewage outlet pipe is connected to the buffer space.

[0018] Compared with the prior art, the utility model has the following advantages: 1. When the hydrogen installed in the explosion-proof box reaches the lower limit of the concentration alarm value, the control unit controls the hydrogen equipment to shut down and open the solenoid valve on the hydrogen release pipe to empty the residual hydrogen in the pipeline of the hydrogen equipment. When the hydrogen concentration sensor detects that the hydrogen reaches the upper limit of the concentration alarm value, the forced exhaust fan installed on the nitrogen release pipeline is further opened for forced release.

[0019] 2. First, inject a sufficient amount of nitrogen from the nitrogen inlet pipe. When nitrogen is detected at the nitrogen discharge pipe, it can be determined that the buffer space in the explosion-proof box is full of nitrogen, thereby replacing the oxygen in the buffer space, filling the box with nitrogen and maintaining a certain pressure. When the hydrogen concentration is higher than the threshold, the hydrogen supply can be stopped, and the hydrogen in the hydrogen equipment can be replaced with nitrogen to avoid the risk of explosion, thereby achieving the purpose of avoiding explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0021] Figure 2It is a three-dimensional cross-sectional structural schematic diagram of the explosion-proof box, the sealing door and the hydrogen release pipe of the utility model.

[0022] Figure 3 It is a three-dimensional cross-sectional structural schematic diagram of the explosion-proof box, hydrogen equipment and return pipe of the utility model.

[0023] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle.

[0024] Figure 5 It is a three-dimensional cross-sectional structural schematic diagram of the explosion-proof box, hydrogen equipment and connecting valve of the utility model.

[0025] Figure 6 It is a schematic diagram of the three-dimensional cross-sectional structure of the explosion-proof box, control unit and water inlet pipe of the utility model.

[0026] Figure 7 It is a three-dimensional structural schematic diagram of the sealing door of the utility model.

[0027] Among them, the above-mentioned drawings include the following figure marks: 1. explosion-proof box, 101. sealed door, 2. hydrogen equipment, 3. hydrogen inlet pipe, 4. hydrogen outlet pipe, 5. hydrogen release pipe, 6. nitrogen inlet pipe, 7. nitrogen release pipe, 8. control unit, 9. hydrogen concentration sensor, 10. gas pressure sensor, 11. temperature sensor, 12. solenoid valve, 13. explosion-proof touch screen, 14. forced exhaust fan, 15. connecting valve, 16. water inlet pipe, 17. return pipe, 18. nitrogen manual discharge port, 19. sewage outlet pipe. DETAILED DESCRIPTION

[0028] Although the present invention may be described with respect to a specific application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as: above, below, upward, downward, etc. are used to describe the drawings and do not represent limitations on the scope of the present invention as defined by the appended claims. Any numerical designations such as: first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0029] Example 1

[0030] An explosion-proof device for hydrogen equipment, see Figure 1-Figure 7As shown, it includes an explosion-proof box 1 for installing a hydrogen device 2, a lifting ring is provided on the top of the explosion-proof box 1, a buffer space is formed between the hydrogen device 2 and the explosion-proof box 1, the bottom of the explosion-proof box 1 is made of non-slip material, which can prevent the hydrogen device 2 from shifting during operation, the hydrogen device 2 is a hydrogen compressor, and also includes a sealed door 101, a hydrogen inlet pipe 3, a hydrogen outlet pipe 4, a hydrogen release pipe 5, a nitrogen inlet pipe 6 and a nitrogen release pipe 7, the sealed door 101 is rotatably connected to the explosion-proof box 1, and the sealed door 101 is connected to the The explosion-proof box 1 is interference fit, and a sealing ring is provided on one side of the sealing door 101 close to the explosion-proof box 1 to ensure the airtightness of the explosion-proof box 1. The hydrogen inlet pipe 3, the hydrogen outlet pipe 4 and the hydrogen release pipe 5 are connected with the hydrogen equipment 2. The outlet of the hydrogen release pipe 5 passes through the top of the explosion-proof box 1. The nitrogen inlet pipe 6 is connected with the buffer space. The nitrogen release pipe 7 is arranged at the top of the explosion-proof box 1 and is connected with the buffer space. A connecting valve 15 is arranged between the nitrogen inlet pipe 6 and the hydrogen inlet pipe 3, and the sewage outlet pipe 19 is connected with the buffer space.

[0031] See also Figure 3 and Figure 4 As shown, it further includes a control unit 8, a hydrogen concentration sensor 9, a gas pressure sensor 10 and a temperature sensor 11, and the hydrogen concentration sensor 9, the gas pressure sensor 10 and the temperature sensor 11 are all connected to the control unit 8 by signal. Among them, the hydrogen concentration sensor 9 and the gas pressure sensor 10 are both arranged in the buffer space or on the inner wall of the explosion-proof box 1, the hydrogen concentration sensor 9 is used to sense whether there is hydrogen leakage in the buffer space, the gas pressure sensor 10 is used to sense the pressure of the gas in the buffer space, and the temperature sensor 11 is arranged on the outer wall of the hydrogen equipment 2 to sense the temperature of the hydrogen equipment 2.

[0032] See also Figure 1 and Figure 2 As shown, the hydrogen release pipe 5 and the nitrogen release pipe 7 are provided with a solenoid valve 12 , and the solenoid valve 12 is connected to the control unit 8 by signal.

[0033] See also Figure 1 As shown, an explosion-proof touch screen 13 is arranged outside the explosion-proof box 1 , and the explosion-proof touch screen 13 is connected to the control unit 8 for signal.

[0034] See also Figure 1 As shown, a manual nitrogen discharge port 18 is included, and the manual nitrogen discharge port 18 is communicated with the buffer space.

[0035] When the hydrogen concentration sensor 9 in the explosion-proof box 1 detects that there is a hydrogen leakage and the concentration reaches the lower limit of the alarm value, the control unit 8 controls the hydrogen equipment 2 to shut down, and opens the solenoid valve 12 on the hydrogen release pipe 5 to evacuate the residual hydrogen in the pipeline of the hydrogen equipment 2. At the same time, the solenoid valve 12 on the nitrogen release pipe 7 is opened to release the hydrogen leaked in the explosion-proof box 1. When the hydrogen concentration sensor 9 detects that the hydrogen reaches the upper limit of the alarm value, the forced exhaust fan 14 installed on the nitrogen release pipe 7 is further opened for forced exhaust, wherein the forced exhaust fan 14 meets the explosion-proof requirements of ⅡCT1.

[0036] When in use, first use nitrogen to inject a sufficient amount of nitrogen from the nitrogen inlet pipe 6, and it is necessary to detect that the nitrogen is discharged from the nitrogen release pipe 7. Since nitrogen is heavier than air, the nitrogen release pipe 7 is set at the top of the explosion-proof box 1. When the nitrogen release pipe 7 detects nitrogen, it can be judged that the buffer space in the explosion-proof box 1 is full of nitrogen, thereby replacing the oxygen in the buffer space. When the replacement is completed, the valves on the nitrogen inlet pipe 6 and the nitrogen release pipe 7 are closed, so that the box is filled with nitrogen and maintains a certain pressure, such as 0.5MPa. At the same time, the nitrogen inlet is provided with a connecting valve 15 connected to the hydrogen inlet. When the hydrogen concentration is higher than the threshold, the hydrogen supply can be stopped, and the nitrogen inlet pipe 6 is connected to the hydrogen inlet pipe 3, and the hydrogen in the hydrogen equipment 2 is replaced with nitrogen to avoid the risk of explosion. In addition, a gas pressure sensor 10 is provided in the explosion-proof box 1. When the gas pressure is lower than the set value, the nitrogen in the explosion-proof box 1 needs to be supplemented. A temperature sensor 11 is provided in the explosion-proof box 1 . When the temperature in the box is higher than a set value, the nitrogen in the explosion-proof box 1 needs to be replaced to reduce the gas temperature in the explosion-proof box 1 .

[0037] Example 2

[0038] Based on Example 1, see Figure 3 , Figure 5 and Figure 6 As shown, it also includes a water inlet pipe 16 and a water return pipe 17 , and the water inlet pipe 16 and the water return pipe 17 are connected to the hydrogen equipment 2 .

[0039] The water inlet pipe 16 and the water return pipe 17 are connected to an external water chiller, and the hydrogen equipment 2 is cooled through the water inlet pipe 16 and the water return pipe 17 .

[0040] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

[0041] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. An explosion-proof device for hydrogen equipment, comprising an explosion-proof box (1) for installing hydrogen equipment (2), A buffer space is formed between the hydrogen equipment (2) and the explosion-proof box (1), characterized in that: It also includes a sealing door (101), a hydrogen inlet pipe (3), a hydrogen outlet pipe (4), a hydrogen release pipe (5), a nitrogen inlet pipe (6) and a nitrogen release pipe (7); The sealing door (101) is rotatably connected to the explosion-proof box (1); The hydrogen inlet pipe (3), the hydrogen outlet pipe (4) and the hydrogen release pipe (5) are connected to the hydrogen equipment (2), and the outlet of the hydrogen release pipe (5) passes through the top of the explosion-proof box (1); The nitrogen inlet pipe (6) is in communication with the buffer space; The nitrogen release pipe (7) is arranged on the top of the explosion-proof box (1) and is connected to the buffer space.

2. An explosion-proof device for hydrogen equipment according to claim 1, characterized in that: It also includes a control unit (8), a hydrogen concentration sensor (9), a gas pressure sensor (10) and a temperature sensor (11); the hydrogen concentration sensor (9), the gas pressure sensor (10) and the temperature sensor (11) are all connected to the control unit (8) by signals.

3. An explosion-proof device for hydrogen equipment according to claim 2, characterized in that: The hydrogen release pipe (5) and the nitrogen release pipe (7) are provided with a solenoid valve (12), and the solenoid valve (12) is connected to the control unit (8) by signal.

4. An explosion-proof device for hydrogen equipment according to claim 3, characterized in that: An explosion-proof touch screen (13) is arranged outside the explosion-proof box (1), and the explosion-proof touch screen (13) is connected to the control unit (8) by signal.

5. The explosion-proof device for hydrogen equipment according to claim 2, characterized in that: A forced exhaust fan (14) is provided on the nitrogen emission pipe, and the forced exhaust fan (14) is connected to the control unit (8) by signal.

6. An explosion-proof device for hydrogen equipment according to claim 1, characterized in that: A communication valve (15) is provided between the nitrogen inlet pipe (6) and the hydrogen inlet pipe (3).

7. The explosion-proof device for hydrogen equipment according to claim 1, characterized in that: It further comprises a water inlet pipe (16) and a water return pipe (17), wherein the water inlet pipe (16) and the water return pipe (17) are connected to the hydrogen equipment (2).

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