SOFC (solid oxide fuel cell) electric pile explosion-proof structure

Abstract

The utility model discloses a solid oxide fuel cell (SOFC) electric pile explosion-proof structure, relates to the electric pile explosion-proof technical field, the SOFC electric pile explosion-proof structure comprises an explosion-proof shell, an SOFC electric pile is arranged in the explosion-proof shell, a buffer cavity is arranged in the side wall of the explosion-proof shell, the inner wall of the explosion-proof shell is provided with an air discharge groove, the air discharge groove is arranged to be conical, and the inner wall of the explosion-proof shell is provided with an air inlet and an air outlet. A sealing block is arranged in the exhaust groove, sealing gaskets are fixedly connected to the surfaces of the upper side and the lower side of the sealing block correspondingly, the sealing gaskets make contact with the inner wall of the exhaust groove, a mounting plate is fixedly connected to the surface of the side, located in the buffer cavity, of the sealing block, and a limiting rod is fixedly connected to the inner wall of the buffer cavity; the mounting plate slidably sleeves the outer surface of the limiting rod, and when internal hazardous gas leakage is caused by failure of the SOFC electric pile, the internal gas can be guided into the buffer cavity through the sealing block which is triggered autonomously, so that a certain reaction time is provided for workers, and dangerous accidents caused by direct leakage are avoided.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell stack explosion protection technology, and in particular to an explosion protection structure for SOFC fuel cell stacks. Background Technology

[0002] A solid oxide fuel cell (SOFC) stack is a device that directly converts chemical energy into electrical energy. It uses solid oxide as the electrolyte and operates at high temperatures (typically 600-1000℃). Its basic principle is based on a redox reaction: fuel (usually hydrogen or a hydrogen-containing gas) undergoes oxidation at the anode, releasing electrons. These electrons travel through an external circuit to the cathode, where oxygen from the air undergoes reduction.

[0003] SOFC fuel cells use combustible gases such as hydrogen as fuel during operation. Due to the flammable and explosive nature of hydrogen, it can easily cause an explosion when the fuel cell malfunctions (such as localized overheating, gas leakage, short circuit, etc.). In view of this, we propose an explosion-proof structure for SOFC fuel cells. Utility Model Content

[0004] The purpose of this invention is to provide an explosion-proof structure for SOFC fuel cell stacks to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof structure for an SOFC fuel cell stack, comprising an explosion-proof shell, an SOFC fuel cell stack disposed inside the explosion-proof shell, a buffer cavity formed inside the side wall of the explosion-proof shell, an exhaust groove formed inside the inner wall of the explosion-proof shell, the exhaust groove being conical, a sealing block disposed inside the exhaust groove, sealing gaskets being fixedly connected to the upper and lower surfaces of the sealing block respectively, the sealing gaskets contacting the inner wall of the exhaust groove, an mounting plate being fixedly connected to one side surface of the sealing block located inside the buffer cavity, a limit rod being fixedly connected to the inner wall of the buffer cavity, the mounting plate being slidably sleeved on the outer surface of the limit rod, a pressure spring being fixedly connected to the side surface of the mounting plate away from the sealing block, and an adjustment component being disposed on the pressure spring.

[0006] Preferably, the adjustment assembly includes an adjustment cylinder, which is fixedly connected to the end of the pressure spring away from the mounting plate. The left and right surfaces of the explosion-proof shell are respectively provided with through grooves extending into the buffer cavity, and sealing rings are provided inside the grooves. The end of the adjustment cylinder away from the pressure spring extends to the outside of the explosion-proof shell through the through grooves.

[0007] Preferably, the adjusting cylinder is slidably connected to the through groove, and a displacement plate is fixedly connected to one end of the adjusting cylinder located outside the explosion-proof shell.

[0008] Preferably, screws are rotatably connected to both the left and right surfaces of the explosion-proof shell, and the end of the screw away from the explosion-proof shell is threaded through the displacement plate.

[0009] Preferably, a knob is fixedly connected to the end of the screw away from the explosion-proof shell, an explosion-proof groove is formed on the outer surface of the explosion-proof shell, the explosion-proof groove is annular, and the adjusting cylinder is slidably sleeved on the outer surface of the limiting rod.

[0010] Preferably, an indicator scale is fixedly connected to both the left and right surfaces of the explosion-proof shell, and the indicator scale slides through the displacement plate on the side surface away from the explosion-proof shell. A locking ring is slidably sleeved on the outer surface of the knob.

[0011] Preferably, the outer surface of the locking ring is fixedly connected with a mounting ear, and a fixing bolt is provided on the mounting ear, the fixing bolt threaded through the interior of the displacement plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The SOFC stack explosion-proof structure can guide the internal gas into the buffer chamber through a self-triggered sealing block when the SOFC stack malfunctions and causes internal hazardous gas leakage, giving the staff a certain reaction time and avoiding dangerous accidents caused by direct leakage.

[0014] 2. The SOFC stack explosion-proof structure allows for convenient adjustment of the pressure spring by moving the adjusting cylinder and using the indicating scale. At the same time, the annular explosion-proof groove can release the pressure inside the buffer chamber when it approaches the limit, preventing greater damage caused by a direct explosion. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the explosion-proof structure of an SOFC fuel cell stack according to the present invention;

[0017] Figure 2 This is a first cross-sectional view of the explosion-proof shell of this utility model;

[0018] Figure 3 This is a second cross-sectional view of the explosion-proof shell of this utility model;

[0019] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0020] Reference numerals: 1. Explosion-proof enclosure; 2. SOFC fuel cell stack; 3. Exhaust duct; 4. Sealing block; 5. Sealing gasket; 6. Mounting plate; 7. Limiting rod; 8. Pressure spring; 9. Adjusting cylinder; 10. Through groove; 11. Sealing ring; 12. Displacement plate; 13. Screw; 14. Knob; 15. Explosion-proof groove; 16. Indicating scale; 17. Locking ring; 18. Mounting ear; 19. Fixing bolt; 20. Buffer chamber. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: an explosion-proof structure for an SOFC fuel cell stack, comprising an explosion-proof shell 1, an SOFC fuel cell stack 2 housed inside the explosion-proof shell 1, a buffer cavity 20 formed inside the side wall of the explosion-proof shell 1, and an exhaust groove 3 formed inside the inner wall of the explosion-proof shell 1. The exhaust groove 3 is conical and contains a sealing block 4. Sealing gaskets 5 are fixedly connected to the upper and lower surfaces of the sealing block 4, respectively, and the sealing gaskets 5 are in contact with the inner wall of the exhaust groove 3. An mounting plate 6 is fixedly connected to one side surface of the sealing block 4 inside the buffer cavity 20. A limit rod 7 is fixedly connected to the inner wall of the buffer cavity 20. The mounting plate 6 is slidably sleeved on the outer surface of the limit rod 7. A pressure spring 8 is fixedly connected to the side surface of the mounting plate 6 away from the sealing block 4. An adjustment component is provided on the pressure spring 8. When the SOFC fuel cell stack 2 malfunctions and causes internal hazardous gas leakage, the gas inside can be guided into the buffer cavity 20 by the self-triggered sealing block 4, giving the personnel a certain reaction time and avoiding dangerous accidents caused by direct leakage.

[0023] Furthermore, the adjustment assembly includes an adjustment cylinder 9, which is fixedly connected to the end of the pressure spring 8 away from the mounting plate 6. The left and right surfaces of the explosion-proof housing 1 are respectively provided with through grooves 10 extending into the buffer cavity 20. A sealing ring 11 is provided inside the through grooves 10. The end of the adjustment cylinder 9 away from the pressure spring 8 extends through the through grooves 10 to the outside of the explosion-proof housing 1. The adjustment cylinder 9 is slidably connected to the through grooves 10. A displacement plate 12 is fixedly connected to the end of the adjustment cylinder 9 located outside the explosion-proof housing 1. Screws 13 are rotatably connected to both the left and right surfaces of the explosion-proof housing 1. The end of the screw 13 away from the explosion-proof housing 1 is threaded through the displacement plate 12. A knob 14 is fixedly connected to the end of the screw 13 away from the explosion-proof housing 1. An explosion-proof groove 1 is provided on the outer surface of the explosion-proof housing 1. 5. The explosion-proof groove 15 is annular. The adjusting cylinder 9 is slidably sleeved on the outer surface of the limiting rod 7. The left and right surfaces of the explosion-proof shell 1 are fixedly connected to the indicator scale 16. The side of the indicator scale 16 away from the explosion-proof shell 1 slides through the displacement plate 12. The outer surface of the knob 14 is slidably sleeved with the locking ring 17. The outer surface of the locking ring 17 is fixedly connected with the mounting ear 18. The mounting ear 18 is provided with the fixing bolt 19. The fixing bolt 19 is threaded through the interior of the displacement plate 12. With the movement of the adjusting cylinder 9 and in conjunction with the indicator scale 16, the pressure of the pressure spring 8 can be adjusted relatively easily. At the same time, the annular explosion-proof groove 15 can release the pressure inside the buffer chamber 20 when it approaches the limit, avoiding greater damage caused by direct explosion.

[0024] Working principle: When a fault occurs in the internal SOFC stack, causing internal gas leakage, the pressure inside the explosion-proof enclosure 1 increases sharply. When the internal pressure exceeds the limit of the pressure spring 8, the pressure will push the sealing block 4 to move. Simultaneously, the sealing block 4 drives the mounting plate 6 to move. The mounting plate 6's movement is limited by the limit rod 7, and it also compresses the pressure spring 8. After the sealing block 4 moves, it disengages from the exhaust groove 3, allowing the leaked gas to enter the buffer chamber 20. Simultaneously, as the pressure continues to increase, the annular explosion-proof groove 15... It will rupture, releasing the gas inside the buffer chamber 20. When adjusting the pressure of the pressure spring 8, the knob 14 can be turned. The knob 14 synchronously drives the screw 13 to rotate. After the screw 13 rotates, it drives the displacement plate 12 to move. The displacement plate 12 synchronously drives the adjusting cylinder 9 to move. Then, the initial compression amplitude of the pressure spring 8 can be adjusted by adjusting the adjusting cylinder 9. After adjustment, the locking ring 17 is put on the knob 14 and fixed by fixing bolt 19. At the same time, when adjusting the pressure of the pressure spring 8, the distance protruding on the displacement plate 12 can be displayed with the help of the indicator scale 16.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A SOFC stack explosion-proof structure comprising an explosion-proof shell (1), characterized in that: The inside of the explosion-proof shell (1) is provided with a SOFC stack (2), the inside of the side wall of the explosion-proof shell (1) is provided with a buffer cavity (20), the inner wall of the explosion-proof shell (1) is provided with an exhaust groove (3), the exhaust groove (3) is tapered, the inside of the exhaust groove (3) is provided with a sealing block (4), the upper and lower side surfaces of the sealing block (4) are respectively fixedly connected with sealing pads (5), the sealing pads (5) are in contact with the inner wall of the exhaust groove (3), one side surface of the sealing block (4) located in the inside of the buffer cavity (20) is fixedly connected with a mounting plate (6), the inner wall of the buffer cavity (20) is fixedly connected with a limiting rod (7), the mounting plate (6) is slidably sleeved on the outer surface of the limiting rod (7), one side surface of the mounting plate (6) away from the sealing block (4) is fixedly connected with a pressure spring (8), and the pressure spring (8) is provided with an adjusting assembly.

2. The explosion-proof structure of a SOFC stack according to claim 1, characterized in that: The adjusting assembly comprises an adjusting cylinder (9), one end of the adjusting cylinder (9) away from the mounting plate (6) is fixedly connected with the pressure spring (8), and the left and right side surfaces of the explosion-proof shell (1) are respectively provided with through grooves (10) extending into the inside of the buffer cavity (20).

3. The explosion-proof structure of a SOFC stack according to claim 2, characterized in that: The inside of the through groove (10) is provided with a sealing ring (11), and one end of the adjusting cylinder (9) away from the pressure spring (8) extends to the outside of the explosion-proof shell (1) through the through groove (10).

4. The explosion-proof structure of a SOFC stack according to claim 3, characterized in that: The adjusting cylinder (9) is slidably connected with the through groove (10), and one end of the adjusting cylinder (9) located outside the explosion-proof shell (1) is fixedly connected with a displacement plate (12).

5. The explosion-proof structure of a SOFC stack according to claim 4, characterized in that: The left and right side surfaces of the explosion-proof shell (1) are rotatably connected with screw rods (13), and one end of the screw rod (13) away from the explosion-proof shell (1) is threaded through the displacement plate (12).

6. The explosion-proof structure of a SOFC stack according to claim 5, characterized in that: One end of the screw rod (13) away from the explosion-proof shell (1) is fixedly connected with a knob (14), the outer surface of the explosion-proof shell (1) is provided with an explosion-proof groove (15), the explosion-proof groove (15) is annularly arranged, and the adjusting cylinder (9) is slidably sleeved on the outer surface of the limiting rod (7).

7. The explosion-proof structure of a SOFC stack according to claim 6, characterized in that: The left and right side surfaces of the explosion-proof shell (1) are fixedly connected with indicating scales (16), one side surface of the indicating scale (16) away from the explosion-proof shell (1) is slidably threaded out of the displacement plate (12), and the outer surface of the knob (14) is slidably sleeved with a locking ring (17).

8. The explosion-proof structure of a SOFC stack according to claim 7, characterized in that: The outer surface of the locking ring (17) is fixedly connected with mounting ears (18), the mounting ears (18) are provided with fixed bolts (19), and the fixed bolts (19) are threaded into the inside of the displacement plate (12).

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