A support frame for a vehicle-mounted hydrogen storage cylinder

Abstract

The utility model discloses a kind of support frame of vehicle-mounted hydrogen storage bottle, it is related to support frame field, including bottom plate, a plurality of support feet are fixedly installed on the bottom plate, a same rectangular frame is fixedly installed on the plurality of support feet, horizontal support plate is fixedly installed in rectangular frame inner wall, vehicle-mounted hydrogen storage bottle is placed on horizontal support plate.The utility model, by using hexagonal support frame one and hexagonal support frame two in the middle part and edge of vehicle-mounted hydrogen storage bottle with two ends clamping, the position of vehicle-mounted hydrogen storage bottle is fixed in the mode of middle fixed, guarantee the safety of vehicle-mounted hydrogen storage bottle, while using reinforcing mechanism is in the side of hexagonal support frame one, hexagonal support frame two is through support, the mode of supporting, and the weight of vehicle-mounted hydrogen storage bottle is evenly shared to each part of frame, to avoid that a small part of component is deformed by excessive pressure, further improve the stability of device.

Description

Technical Field

[0001] This utility model relates to the field of support frame technology, and in particular to a support frame for a vehicle-mounted hydrogen storage cylinder. Background Technology

[0002] Onboard hydrogen storage tanks are containers used to store and transport hydrogen, primarily for hydrogen fuel cell vehicles. Hydrogen fuel cell trucks use high-pressure hydrogen storage tanks to store hydrogen, and the fuel cell system reacts hydrogen with oxygen to generate electricity. The only emission is water vapor, truly achieving "zero emissions".

[0003] In the existing technology, the on-board hydrogen storage cylinder is an energy storage component of hydrogen fuel cell trucks. Suitable components are needed to protect and fix the on-board hydrogen storage cylinder to prevent damage to the on-board hydrogen storage cylinder due to shaking, corrosion, etc. during driving. Therefore, a support frame for the on-board hydrogen storage cylinder is needed to meet people's needs. Utility Model Content

[0004] The purpose of this utility model is to provide a support frame for vehicle-mounted hydrogen storage cylinders, so as to solve the problem mentioned in the background art of needing suitable components to protect and fix vehicle-mounted hydrogen storage cylinders, and to avoid damage to vehicle-mounted hydrogen storage cylinders due to shaking, corrosion and other reasons during driving.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a support frame for a vehicle-mounted hydrogen storage cylinder, comprising a base plate, on which multiple support legs are fixedly installed, and on which the same rectangular frame is fixedly installed, a horizontal support plate is fixedly installed on the inner wall of the rectangular frame, on which the vehicle-mounted hydrogen storage cylinder is placed, and a hexagonal support frame one and a hexagonal support frame two are arranged between the horizontal support plate and the vehicle-mounted hydrogen storage cylinder, and a reinforcing mechanism is arranged between the hexagonal support frame one, the hexagonal support frame two and the rectangular frame, and a shell is also arranged on the base plate, with a buffer mechanism arranged between the rectangular frame and the shell, and an explosion-proof ventilation mechanism arranged on the top of the shell.

[0006] Preferably, a rubber ring is fixedly installed on the inner wall of the hexagonal support frame one, and the rubber ring is in contact with the vehicle-mounted hydrogen storage cylinder. An L-shaped metal plate is arranged between the hexagonal support frame one and the rectangular frame. Mounting bolts are arranged between the L-shaped metal plate and the rectangular frame and the hexagonal support frame one. The hexagonal support frame one is adapted to the spherical end of the vehicle-mounted hydrogen storage cylinder, and the hexagonal support frame two is adapted to the column of the vehicle-mounted hydrogen storage cylinder.

[0007] Preferably, the reinforcement mechanism includes a vertical reinforcement rod 1, which is fixedly installed on the inner side wall of the rectangular frame. At the end of the vertical reinforcement rod 1 near the hexagonal support frame 1 and the hexagonal support frame 2, multiple external support rods and external suspension rods are bolted to it. The external support rods and external suspension rods are bolted to the two sides of the hexagonal support frame 1 and the hexagonal support frame 2, respectively.

[0008] Preferably, a bottom mounting rod is fixedly installed on the rectangular frame, and a second vertical reinforcing rod is fixedly installed on the bottom mounting rod. Multiple middle support rods and middle suspension rods are bolted to the side of the second vertical reinforcing rod near the first and second hexagonal support frames. The middle support rods and middle suspension rods are respectively bolted to the side of the first and second hexagonal support frames.

[0009] Preferably, the buffer mechanism includes a connecting plate and an energy-absorbing component. The connecting plate is arranged on the inner wall of the housing, and the energy-absorbing component is arranged between the rectangular frame and the connecting plate.

[0010] Preferably, the energy-absorbing component includes a damping spring, with mounting block one and mounting block two rotatably mounted on both ends of the damping spring, mounting block one being fixedly mounted on the rectangular frame, and mounting block two being fixedly mounted on the side of the connecting plate.

[0011] Preferably, the damping spring includes a fixed sleeve and a movable rod. The movable rod is inserted into the fixed sleeve. A partition sleeve is arranged inside the fixed sleeve, which divides the fixed sleeve into inner and outer oil chambers. One end of the movable rod extends into the inner oil chamber and is fixedly installed with a piston. A damping valve is provided on the partition sleeve. A first spring is sleeved on the movable rod. The two ends of the first spring are fixedly installed on the fixed sleeve and the movable rod, respectively. A second spring is fixedly installed on the piston. One end of the second spring is fixedly installed on the inner wall of the fixed sleeve.

[0012] Preferably, a waterproof cover is fixedly installed at the top of the shell, a disc is fixedly installed on the side of the shell, and an isolation plate is fixedly installed on the top side of the bottom plate. The isolation plate and the shell form a waterproof groove, and a drain valve is fixedly installed at the bottom of the waterproof groove.

[0013] Preferably, the explosion-proof ventilation mechanism includes an explosion-proof box, which is arranged on the top side of the waterproof cover. Several hydrogen sensors are fixedly installed on the inner wall of the box. A gas supply pipe is fixedly installed on the bottom side of the explosion-proof box. The gas supply pipe extends to the top of the bottom plate and is fixedly installed with an exhaust plate. An air pump is fixedly installed inside the explosion-proof box. The outlet end of the air pump is connected to the gas supply pipe, and an inlet pipe is installed at the inlet end of the air pump.

[0014] Preferably, an air pump two is also fixedly installed inside the explosion-proof box. The air inlet end of the air pump two extends into the shell and is fixedly installed with an air suction cover. The air outlet end of the air pump two is fixedly installed with an exhaust pipe.

[0015] The beneficial effects of this utility model are: In this invention, hexagonal support frame one and hexagonal support frame two are used to clamp the hydrogen storage cylinder at both ends and fix it in the middle to ensure the safety of the hydrogen storage cylinder. At the same time, a reinforcement mechanism is used on the sides of hexagonal support frame one and hexagonal support frame two to support and lift the weight of the hydrogen storage cylinder evenly to each part of the frame, thereby avoiding deformation of some components due to excessive pressure and further improving the stability of the device.

[0016] In this invention, to further improve the safety of the device, a buffer mechanism is used on the side of the vehicle-mounted hydrogen storage cylinder as an isolation means, so that when the device is impacted, part of the impact can be absorbed by the buffer mechanism, reducing direct damage to the vehicle-mounted hydrogen storage cylinder. At the same time, an explosion-proof ventilation mechanism is used to monitor the internal hydrogen concentration of the device, and in the event of a leak, it can be vented in time to avoid further harm. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of a support frame for a vehicle-mounted hydrogen storage cylinder proposed in this utility model. Figure 2 This is a schematic diagram of the internal structure of a support frame for a vehicle-mounted hydrogen storage cylinder proposed in this utility model. Figure 3 This is a side view of the support frame for a vehicle-mounted hydrogen storage cylinder proposed in this utility model. Figure 4 This is a top view of the structural diagram of the support frame for a vehicle-mounted hydrogen storage cylinder proposed in this utility model. Figure 5 This is a cross-sectional structural diagram of the support frame for a vehicle-mounted hydrogen storage cylinder proposed in this utility model. Figure 6 This is a schematic diagram of a portion of the hexagonal support frame of a vehicle-mounted hydrogen storage cylinder according to the present invention. Figure 7 This is a schematic diagram of the damping spring portion of the support frame for a vehicle-mounted hydrogen storage tank proposed in this utility model. Figure 8 This is a structural schematic diagram of the explosion-proof box portion of the support frame for a vehicle-mounted hydrogen storage cylinder proposed in this utility model.

[0018] In the diagram: 1. Base plate; 101. Support leg; 102. Rectangular frame; 103. Horizontal support plate; 104. Vehicle-mounted hydrogen storage cylinder; 2. Hexagonal support frame one; 201. Hexagonal support frame two; 202. Mounting bolt; 203. Rubber ring; 204. L-shaped metal sheet; 3. Vertical reinforcement rod one; 301. External support rod; 302. External suspension rod; 303. Bottom mounting rod; 304. Vertical reinforcement rod two; 305. Middle support rod; 306. Middle suspension rod; 307. Isolation plate; 308. Drain valve; 4. Connecting plate ; 401, Energy Absorption Component; 402, Mounting Block 1; 403, Mounting Block 2; 404, Damping Spring; 405, Fixing Sleeve; 406, Movable Rod; 407, Spring 1; 408, Separating Sleeve; 409, Piston; 410, Spring 2; 411, Damping Valve; 5, Housing; 501, Waterproof Cover; 502, Disc; 503, Exhaust Pipe; 504, Explosion-proof Box; 505, Hydrogen Sensor; 506, Exhaust Plate; 507, Gas Supply Pipe; 508, Inlet Pipe; 509, Air Pump 1; 510, Air Pump 2; 511, Suction Hood. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-8 A support frame for a vehicle-mounted hydrogen storage cylinder includes a base plate 1. Multiple support legs 101 are fixedly installed on the base plate 1. A rectangular frame 102 is fixedly installed on each support leg 101. A horizontal support plate 103 is fixedly installed on the inner wall of the rectangular frame 102. A vehicle-mounted hydrogen storage cylinder 104 is placed on the horizontal support plate 103. Hexagonal support frame 1 2 and hexagonal support frame 2 201 are arranged between the horizontal support plate 103 and the vehicle-mounted hydrogen storage cylinder 104. A reinforcing mechanism is arranged between the hexagonal support frame 1 2, hexagonal support frame 2 201 and the rectangular frame 102. A shell 5 is also arranged on the base plate 1. A buffer mechanism is arranged between the rectangular frame 102 and the shell 5. An explosion-proof ventilation mechanism is arranged on the top of the shell 5.

[0021] In an optional embodiment: a rubber ring 203 is fixedly installed on the inner wall of the hexagonal support frame 12, the rubber ring 203 is in contact with the vehicle-mounted hydrogen storage cylinder 104, an L-shaped metal sheet 204 is arranged between the hexagonal support frame 12 and the rectangular frame 102, and mounting bolts 202 are arranged between the L-shaped metal sheet 204, the rectangular frame 102, and the hexagonal support frame 12, wherein the hexagonal support frame 12 is adapted to the spherical end of the vehicle-mounted hydrogen storage cylinder 104, and the hexagonal support frame 201 is adapted to the column of the vehicle-mounted hydrogen storage cylinder 104.

[0022] It should be noted that the hexagonal support frame 12 and hexagonal support frame 201 are used to fix and support the hydrogen storage cylinder 104 at both ends and the middle. The structure of the hexagonal support frame 12 and hexagonal support frame 201 has good stability.

[0023] In an optional embodiment: the reinforcement mechanism includes a vertical reinforcement rod 3, which is fixedly installed on the inner side wall of the rectangular frame 102. A plurality of external support rods 301 and external suspension rods 302 are bolted to one end of the vertical reinforcement rod 3 near the hexagonal support frame 2 and the hexagonal support frame 201. The external support rods 301 and external suspension rods 302 are bolted to the two sides of the hexagonal support frame 2 and the hexagonal support frame 201, respectively.

[0024] It should be noted that, in order to distribute the weight of the on-board hydrogen storage tank 104 evenly, external support rods 301 and central support rods 305 are used to support the lower half of the hexagonal support frame 1 2 and the hexagonal support frame 2 201.

[0025] In an optional embodiment: a bottom mounting rod 303 is fixedly installed on the rectangular frame 102, and a vertical reinforcing rod 304 is fixedly installed on the bottom mounting rod 303. Multiple middle support rods 305 and middle suspension rods 306 are bolted to the side of the vertical reinforcing rod 304 near the hexagonal support frame 2 and the hexagonal support frame 201. The middle support rods 305 and the middle suspension rods 306 are respectively bolted to the side of the hexagonal support frame 2 and the hexagonal support frame 201.

[0026] It should be noted that the external suspension rod 302 and the middle suspension rod 306 are suspended in the upper part of the hexagonal support frame 1 2 and the hexagonal support frame 2 201, thereby achieving the effect of stabilizing and reinforcing the position of the hexagonal support frame 1 2 and the hexagonal support frame 2 201.

[0027] In an optional embodiment: the buffer mechanism includes a connecting plate 4 and an energy-absorbing component 401, the connecting plate 4 being arranged on the inner wall of the housing 5, and the energy-absorbing component 401 being arranged between the rectangular frame 102 and the connecting plate 4.

[0028] In an optional embodiment: the energy absorption assembly 401 includes a damping spring 404, with mounting block 1 402 and mounting block 2 403 rotatably mounted at both ends of the damping spring 404, mounting block 1 402 being fixedly mounted on the rectangular frame 102, and mounting block 2 403 being fixedly mounted on the side of the connecting plate 4.

[0029] In an optional embodiment: the damping spring 404 includes a fixed sleeve 405 and a movable rod 406. The movable rod 406 is inserted into the fixed sleeve 405. A partition sleeve 408 is arranged inside the fixed sleeve 405, which divides the fixed sleeve 405 into inner and outer oil chambers. One end of the movable rod 406 extends into the inner oil chamber and is fixedly mounted on a piston 409. A damping valve 411 is provided on the partition sleeve 408. A first spring 407 is sleeved on the movable rod 406. The two ends of the first spring 407 are fixedly mounted on the fixed sleeve 405 and the movable rod 406, respectively. A second spring 410 is fixedly mounted on the piston 409. One end of the second spring 410 is fixedly mounted on the inner wall of the fixed sleeve 405.

[0030] It should be noted that the energy-absorbing component 401 is used to achieve the buffering function. The fixed sleeve 405 and the movable rod 406 are respectively equipped with spring 2 410 and spring 1 407, forming a double spring energy-absorbing structure, which can significantly reduce impact damage. At the same time, the hydraulic oil flows through the damping valve 411 on the inner and outer sides of the partition sleeve 408, producing a good damping effect, thereby further achieving buffering and shock absorption to avoid the danger caused by hydrogen leakage.

[0031] In an optional embodiment: a waterproof cover 501 is fixedly installed on the top of the housing 5, a disc 502 is fixedly installed on the side of the housing 5, an isolation plate 307 is fixedly installed on the top side of the bottom plate 1, the isolation plate 307 and the housing 5 form a waterproof groove, and a drain valve 308 is fixedly installed at the bottom of the waterproof groove.

[0032] In an optional embodiment: the explosion-proof ventilation mechanism includes an explosion-proof box 504, which is arranged on the top side of the waterproof cover 501. Several hydrogen sensors 505 are fixedly installed on the inner wall of the housing 5. A gas supply pipe 507 is fixedly installed on the bottom side of the explosion-proof box 504. The gas supply pipe 507 extends to the top of the base plate 1 and is fixedly installed with an exhaust plate 506. An air pump 509 is fixedly installed inside the explosion-proof box 504. The outlet end of the air pump 509 is connected to the gas supply pipe 507, and an inlet pipe 508 is installed at the inlet end of the air pump 509.

[0033] In an optional embodiment: an air pump 510 is also fixedly installed inside the explosion-proof box 504. The air inlet end of the air pump 510 extends into the housing 5 and is fixedly installed with an air suction hood 511. The air outlet end of the air pump 510 is fixedly installed with an exhaust pipe 503.

[0034] It should be noted that the internal hydrogen concentration is monitored by hydrogen sensor 505, and external air is pumped into the housing 5 by air pump 1 509. The air is released at the bottom of the housing 5 by exhaust plate 506, and absorbed at the top of the housing 5 by air pump 2 510 and air intake hood 511, so as to achieve rapid replacement of the gas inside the housing 5.

[0035] Working principle of this utility model: When using this device, the vehicle-mounted hydrogen storage cylinder 104 needs to be arranged in a frame composed of a rectangular frame 102 and a horizontal support plate 103. Hexagonal support frames 1-2 and 201 are used to fix and support the vehicle-mounted hydrogen storage cylinder 104 at both ends and the middle. The structure of hexagonal support frames 1-2 and 201 has good stability. To ensure that the weight of the vehicle-mounted hydrogen storage cylinder 104 is evenly distributed, external support rods 301 and middle support rods 305 are used to support the lower half of the hexagonal support frames 1-2 and 201. External suspension rods 302 and middle suspension rods 306 are used to support the hexagonal support frames 1-2 and 201. The upper part is suspended to stabilize and reinforce the positions of the hexagonal support frame 1 2 and the hexagonal support frame 2 201. The interior of the hexagonal support frame 1 2 and the hexagonal support frame 2 201 uses rubber rings 203 to contact the vehicle hydrogen storage tank 104 to prevent damage to the outer shell of the vehicle hydrogen storage tank 104. The hexagonal support frame 1 2 is pressed against each other at the arc end of the vehicle hydrogen storage tank 104, while the hexagonal support frame 2 201 is fixed in the middle of the vehicle hydrogen storage tank 104, so that the vehicle hydrogen storage tank 104 can be placed in the movable position within the frame. The internal mechanism is covered by the shell 5 and the waterproof cover 501 to prevent rainwater from corroding the components. At the same time, the internal water is drained by the isolation plate 307 and the drain valve 308. Between the rectangular frame 102 and the housing 5, an energy-absorbing component 401 is used for buffering. The fixed sleeve 405 and the movable rod 406 use a double spring, spring 410 and movable rod 406, as an energy-absorbing component, which can significantly reduce impact damage. At the same time, hydraulic oil flows through the damping valve 411 on both the inner and outer sides of the partition sleeve 408 to achieve a good damping effect, thereby achieving a buffering effect to prevent hydrogen leakage and danger. The hydrogen sensor 505 monitors the internal hydrogen concentration, and the air pump 509 pumps external air into the housing 5. The air is released at the bottom of the housing 5 by the exhaust plate 506, and absorbed at the top of the housing 5 by the air pump 510 and the suction hood 511, to achieve rapid replacement of the gas inside the housing 5.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A support frame for an on-board hydrogen storage cylinder, comprising a base plate (1), characterized in that: Multiple support feet (101) are fixedly installed on the base plate (1), and the same rectangular frame (102) is fixedly installed on the multiple support feet (101). A horizontal support plate (103) is fixedly installed on the inner wall of the rectangular frame (102). A vehicle-mounted hydrogen storage cylinder (104) is placed on the horizontal support plate (103). A hexagonal support frame one (2) and a hexagonal support frame two (201) are arranged between the horizontal support plate (103) and the vehicle-mounted hydrogen storage cylinder (104). A reinforcing mechanism is arranged between the hexagonal support frame one (2), the hexagonal support frame two (201) and the rectangular frame (102). A shell (5) is also arranged on the base plate (1). A buffer mechanism is arranged between the rectangular frame (102) and the shell (5). An explosion-proof ventilation mechanism is arranged on the top of the shell (5).

2. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that: A rubber ring (203) is fixedly installed on the inner wall of the hexagonal support frame one (2). The rubber ring (203) is in contact with the vehicle-mounted hydrogen storage cylinder (104). An L-shaped metal sheet (204) is arranged between the hexagonal support frame one (2) and the rectangular frame (102). An installation bolt (202) is arranged between the L-shaped metal sheet (204) and the rectangular frame (102) and the hexagonal support frame one (2). The hexagonal support frame one (2) is adapted to the spherical end of the vehicle-mounted hydrogen storage cylinder (104), and the hexagonal support frame two (201) is adapted to the column of the vehicle-mounted hydrogen storage cylinder (104).

3. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that: The reinforcement mechanism includes a vertical reinforcement rod (3), which is fixedly installed on the inner side wall of the rectangular frame (102). The end of the vertical reinforcement rod (3) near the hexagonal support frame (2) and the hexagonal support frame (201) is bolted with multiple external support rods (301) and external suspension rods (302). The external support rods (301) and external suspension rods (302) are bolted to the two sides of the hexagonal support frame (2) and the hexagonal support frame (201).

4. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that: A bottom mounting rod (303) is fixedly installed on the rectangular frame (102). A vertical reinforcing rod (304) is fixedly installed on the bottom mounting rod (303). Multiple middle support rods (305) and middle suspension rods (306) are bolted to the side of the vertical reinforcing rod (304) near the hexagonal support frame (2) and the hexagonal support frame (201). The middle support rods (305) and the middle suspension rods (306) are respectively bolted to the side of the hexagonal support frame (2) and the hexagonal support frame (201).

5. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that: The buffer mechanism includes a connecting plate (4) and an energy-absorbing component (401). The connecting plate (4) is arranged on the inner wall of the housing (5), and the energy-absorbing component (401) is arranged between the rectangular frame (102) and the connecting plate (4).

6. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 5, characterized in that: The energy absorption assembly (401) includes a damping spring (404), with mounting block one (402) and mounting block two (403) rotatably mounted on both ends of the damping spring (404). Mounting block one (402) is fixedly mounted on the rectangular frame (102), and mounting block two (403) is fixedly mounted on the side of the connecting plate (4).

7. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 6, characterized in that: The damping spring (404) includes a fixed sleeve (405) and a movable rod (406). The movable rod (406) is inserted into the fixed sleeve (405). A partition sleeve (408) is arranged inside the fixed sleeve (405). The partition sleeve (408) divides the fixed sleeve (405) into inner and outer oil chambers. One end of the movable rod (406) extends to the inner oil chamber and is fixedly installed with a piston (409). The partition sleeve (408) is provided with a damping valve (411). A spring one (407) is sleeved on the movable rod (406). The two ends of the spring one (407) are fixedly installed on the fixed sleeve (405) and the movable rod (406) respectively. A spring two (410) is fixedly installed on the piston (409). One end of the spring two (410) is fixedly installed on the inner wall of the fixed sleeve (405).

8. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that: A waterproof cover (501) is fixedly installed on the top of the shell (5), a disc (502) is fixedly installed on the side of the shell (5), and an isolation plate (307) is fixedly installed on the top side of the bottom plate (1). The isolation plate (307) and the shell (5) form a waterproof groove, and a drain valve (308) is fixedly installed at the bottom of the waterproof groove.

9. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that: The explosion-proof ventilation mechanism includes an explosion-proof box (504), which is arranged on the top side of the waterproof cover (501). Several hydrogen sensors (505) are fixedly installed on the inner wall of the shell (5). A gas supply pipe (507) is fixedly installed on the bottom side of the explosion-proof box (504). The gas supply pipe (507) extends to the top of the bottom plate (1) and is fixedly installed with an exhaust plate (506). An air pump (509) is fixedly installed inside the explosion-proof box (504). The outlet end of the air pump (509) is connected to the gas supply pipe (507). An inlet pipe (508) is installed at the inlet end of the air pump (509).

10. The support frame for a vehicle-mounted hydrogen storage cylinder according to claim 9, characterized in that: The explosion-proof box (504) is also fixedly installed with an air pump (510). The air inlet of the air pump (510) extends into the housing (5) and is fixedly installed with an air suction hood (511). The air outlet of the air pump (510) is fixedly installed with an exhaust pipe (503).

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