Convenient-to-connect oxygen and water storage system for underwater fuel cell system

Abstract

The invention relates to the technical field of oxygen and water storage devices, and discloses a convenient-to-connect oxygen and water storage system for an underwater fuel cell system, the convenient-to-connect oxygen and water storage system comprises an oxygen storage system, a water storage system, a combined guide assembly and a locking assembly, the oxygen storage system comprises a gas cylinder, and the water storage system comprises two end surface water tanks and two bottom water tanks; the two end face water tanks are arranged at the two ends of the gas cylinder respectively, the surface shape of the side, close to the gas cylinder, of each end face water tank is matched with the shape of the gas cylinder, the two bottom water tanks are arranged at the bottom of the gas cylinder, and the surface shape of the side, close to the gas cylinder, of each bottom water tank is matched with the shape of the gas cylinder and supports the gas cylinder. The combined guiding assembly is used for guiding connection of the gas cylinder and the two end face water tanks, the locking assembly is used for locking the gas cylinder and the end face water tanks and clamping the two bottom water tanks between the two end face water tanks, and through reasonable structural design and combination of the oxygen storage device and the water storage device, the overall occupied volume of the oxygen and water storage system is reduced; and miniaturization of the underwater power device is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen and water storage devices, and in particular to an oxygen and water storage system for an underwater fuel cell system which is convenient to connect. Background Art

[0002] A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy. The oxygen and water storage system is installed in the compartment of the underwater device. Its function is to store water and oxygen for the fuel cell. During the process, it detects its temperature and pressure and outputs signals.

[0003] Existing oxygen storage devices and water storage devices are usually independently arranged, with multiple gas cylinders and water tanks. However, the separate arrangement requires the gas cylinders and water tanks to occupy a large space, which is not conducive to the miniaturization design of the underwater power device. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an oxygen and water storage system for an underwater fuel cell system that is easy to connect. Through reasonable structural design and combination of the oxygen storage device and the water storage device, the overall occupied volume of the oxygen and water storage system is reduced, which is conducive to the miniaturized design of the underwater power device.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An oxygen and water storage system for an underwater fuel cell system with convenient connection, comprising

[0007] An oxygen storage system, the oxygen storage system comprising a gas cylinder,

[0008] A water storage system, the water storage system comprises two end water tanks and two bottom water tanks, the two end water tanks are respectively arranged at the two ends of the gas cylinder, the surface shape of the end water tank close to the gas cylinder is adapted to the shape of the gas cylinder, and the two bottom water tanks are arranged at the bottom of the gas cylinder, the surface shape of the bottom water tank close to the gas cylinder is adapted to the shape of the gas cylinder and provides support for the gas cylinder,

[0009] A combined guide assembly is used to provide guidance for the connection between the gas cylinder and the two end water tanks.

[0010] A locking assembly is used to lock the gas cylinder and the end water tank and clamp the two bottom water tanks between the two end water tanks.

[0011] Furthermore, the combined guide assembly includes two connecting brackets and a connecting piece, the two connecting brackets are arranged on both sides of the central axis of the gas cylinder, the connecting piece connects the two connecting brackets into one and forms an annular structure, when the annular structure is sleeved on the outside of the gas cylinder, the connecting bracket is positioned against the outer surface of the gas cylinder, the connecting bracket is extended along the central axis of the gas cylinder, both ends of the connecting bracket are provided with guide grooves, both sides of the end water tank are fixedly connected with guide sliders, and each of the guide sliders is slidably matched with one of the guide grooves.

[0012] Furthermore, the connecting member includes two upper straps and two lower straps, and the upper straps and the lower straps are both connected between the two connecting brackets.

[0013] Furthermore, the connecting member includes an elastic strap, a first connecting strap and a second connecting strap, each end of the elastic strap is fixedly connected to a corresponding connecting bracket, one end of the first connecting strap is rotatably connected to one of the connecting brackets, the other end of the first connecting strap is fixedly connected to a hoop shell, a length adjustment component is arranged in the hoop shell, an installation gap for inserting the second connecting strap is opened on the hoop shell, one end of the second connecting strap is rotatably connected to another connecting bracket, and a plurality of tooth holes are opened on the other end of the second connecting strap, when the end of the second connecting strap is inserted into the installation gap, the length adjustment component cooperates with the tooth holes to adjust the overlapping length of the first connecting strap and the second connecting strap and stretch the elastic strap to adjust the positions of the two connecting brackets.

[0014] Further, the length adjustment assembly includes a first worm and a second worm, the axes of the first worm and the second worm are arranged in parallel, and the first worm and the second worm are both rotatably connected to the hoop shell, the rotation directions of the first worm and the second worm are opposite, and the tooth hole includes a first connecting hole and a second connecting hole, the first connecting hole is adapted to the first worm, and the second connecting hole is adapted to the second worm, when the first worm and the second worm are rotated in opposite directions, the overlapping length of the second connecting belt and the first connecting belt can be extended or shortened.

[0015] Furthermore, a first gear and a second gear are rotatably connected to the hoop shell, the first gear and the first worm are coaxially fixedly connected, the second gear and the second worm are coaxially fixedly connected, and the first gear and the second gear are meshed with each other.

[0016] Furthermore, a locking mechanism is provided on the hoop shell, and the locking mechanism includes a locking gear and an elastic member. The axis of the locking gear is arranged parallel to the first gear and the second gear. The locking gear and the hoop shell are slidably connected. The sliding direction of the locking gear is parallel to the axis direction of the locking gear. The locking gear can switch between an unlocked position and a locked position when sliding. When in the locked position, the locking gear is meshed with the first gear or the second gear. When in the unlocked position, the locking gear is disengaged from the first gear and the second gear. The elastic member is used to drive the locking gear to reset from the unlocked position to the locked position.

[0017] Further, one end of the first worm is exposed from the hoop shell and a first groove is formed on the end surface, one end of the second worm is exposed from the hoop shell and a second groove is formed on the end surface, the first gear and the second gear are both exposed from the hoop shell, and a locking assembly is provided on the hoop shell, the locking assembly includes a rotating rod and a torsion spring, the rotating rod is rotatably mounted on the hoop shell, a limiting portion is formed on the rotating rod, the shape of the limiting portion is adapted to the tooth shape of the first gear or the second gear, the torsion spring is installed on the rotating shaft of the rotating rod, and the torsion spring is used to drive the limiting portion to engage with the first gear or the second gear to limit the rotation of the first gear and the second gear.

[0018] Furthermore, a first water pipe and a second water pipe are connected between the bottom water tank and the end water tank located at the same end of the gas cylinder, the first water pipe is arranged below the second water pipe, and the connecting position of the second water pipe and the end water tank is higher than the connecting position of the second water pipe and the bottom water tank.

[0019] Furthermore, the nozzle is connected to an air inlet and a pressure relief assembly, and the pressure relief mechanism includes an air pipeline, on which a high-pressure shut-off valve, a high-pressure solenoid valve, a low-pressure sensor and a pressure reducing valve are sequentially arranged.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention is provided with a gas cylinder, two end water tanks and two bottom water tanks. The gas source and the water source can be combined together by combining the gas cylinder and the multiple water tanks to obtain a compact oxygen and water storage system, which reduces the occupied space and is beneficial to the operation of the underwater power device. The arrangement of the combined guide assembly facilitates the rapid positioning and guiding of the two end water tanks, which facilitates rapid assembly. The radial relative rotation of the end water tank and the gas cylinder is limited by the radial limit nut of the locking assembly, and the radial relative rotation of the end water tank and the gas cylinder is limited by the axial locking nut, so that the gas storage system and the water storage system can be reliably connected together.

[0022] 2. The present invention can quickly install two connecting brackets on the outside of the gas cylinder by setting the connecting parts, using elastic bands, the first connecting band and the second connecting band. Compared with rigid connecting parts, the scheme disclosed in this scheme has clear requirements on the installation accuracy of the guide slide groove and the guide slider, can tolerate a certain degree of production and assembly errors, and is easy to use. Then, the overlapping length of the first connecting band and the second connecting band is adjusted through the length adjustment component. The setting of the elastic band allows the relative position of the two connecting brackets to be adjusted, which is convenient for positioning. The connecting bracket relies on its own shape to position itself with the surface of the gas cylinder, which can achieve a good positioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of Example 1;

[0024] Figure 2 is a schematic structural diagram of the locking assembly in Example 1;

[0025] Figure 3 is a schematic diagram of the overall structure of Example 2;

[0026] Figure 4 is a schematic diagram of the connection structure of the hoop shell, the first binding strap and the second binding strap in Example 2;

[0027] Reference numerals:

[0028] 1. Gas cylinder; 11. Nozzle; 2. End water tank; 21. Guide slider; 3. Bottom water tank; 4. Connecting bracket; 401. Guide slide; 41. Upper strap; 42. Lower strap; 43. Elastic strap; 44. First strap; 45. Second strap; 451. First connecting hole; 452. Second connecting hole; 5. Hoop shell; 51. First worm; 511. First gear; 52. Second worm; 521. Second gear; 53. Rotating rod; 6. Radial limit nut; 7. Axial locking nut. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] like Figure 1 As shown, the embodiment of the present invention is an oxygen and water storage system for an underwater fuel cell system with convenient connection, including an oxygen storage system, a water storage system, a combined guide assembly and a locking assembly.

[0033] The oxygen storage system includes a gas cylinder 1. The water storage system includes two end water tanks 2 and two bottom water tanks 3. The two end water tanks 2 are respectively arranged at the two ends of the gas cylinder 1. The surface shape of the end water tank 2 close to the gas cylinder 1 is adapted to the shape of the gas cylinder 1. The two bottom water tanks 3 are arranged at the bottom of the gas cylinder 1. The surface shape of the bottom water tank 3 close to the gas cylinder 1 is adapted to the shape of the gas cylinder 1 and provides support for the gas cylinder 1. In this embodiment, by setting the shapes of the end water tanks 2 and the bottom water tanks 3, the bottom water tanks 3 are used to provide support for the gas cylinder 1, and the end water tanks 2 are installed at the position of the end of the gas cylinder 1, so as to make full use of the space outside the gas cylinder 1, thereby making the gas storage system and the water storage system compact in structure and occupying a small space.

[0034] The combined guide assembly is used to provide guidance for the connection between the gas cylinder 1 and the two end water tanks 2. The combined guide assembly includes two connecting brackets 4 and a connecting piece. The two connecting brackets 4 are arranged on both sides of the central axis of the gas cylinder 1. The connecting piece connects the two connecting brackets 4 into one and forms an annular structure. When the annular structure is sleeved on the outside of the gas cylinder 1, the connecting bracket 4 is positioned against the outer surface of the gas cylinder 1. The connecting bracket 4 is extended along the central axis of the gas cylinder 1. Both ends of the connecting bracket 4 are provided with guide grooves 401. Both sides of the end water tank 2 are fixedly connected with guide sliders 21, and each guide slider 21 is respectively slidably matched with one of the guide grooves 401. In this embodiment, the combined guide assembly can position and guide the positions of the two end water tanks 2, thereby ensuring the consistency of the connection of the two end faces of the gas cylinder 1, balancing the forces on both sides of the gas cylinder 1, so that the water and oxygen storage system can be maintained in a relatively stable state after locking.

[0035] like Figure 2 As shown, the locking assembly is used to lock the gas cylinder 1 and the end water tank 2 and clamp the two bottom water tanks 3 between the two end water tanks 2. The two ends of the gas cylinder 1 are provided with a nozzle 11, and the locking assembly includes a radial limit nut 6 and an axial locking nut 7. The radial limit nut 6 is threadedly connected with the nozzle 11. The shape of the radial limit nut 6 is hexagonal. A limit hole is provided on the end water tank 2. The limit hole is sleeved on the outside of the radial limit nut 6 to limit the radial relative rotation of the end water tank 2 and the gas cylinder 1. The axial locking nut 7 is threadedly connected with the nozzle 11 and abuts against the end face of the end water tank 2 away from the gas cylinder 1 to limit the axial relative displacement of the end water tank 2 and the gas cylinder 1. The gas outlet and intake of the gas cylinder 1 are completed by the nozzle 11. The nozzle 11 is connected with an air inlet and a pressure relief assembly. The pressure relief mechanism includes a gas line pipeline, and a high-pressure stop valve, a high-pressure solenoid valve, a low-pressure sensor and a pressure reducing valve are sequentially arranged on the gas line pipeline.

[0036] The two end water tanks 2 and the four bottom water tanks 3 are divided into two groups according to the installation position, and the water tanks located at the same end of the gas cylinder 1 are regarded as one group. In each group of water tanks, the first water pipe and the second water pipe are connected between the bottom water tank 3 and the end water tank 2 located at the same end of the gas cylinder 1. The first water pipe is arranged below the second water pipe, and the connection position between the second water pipe and the end water tank 2 is higher than the connection position between the second water pipe and the bottom water tank 3. This arrangement is mainly considered to facilitate the filling and drainage of the bottom water tank 3. The water outlet is arranged on the side of the end water tank 2 near the bottom. A water inlet pipe is connected between the two end water tanks 2, and a water inlet is arranged on the water inlet pipe. A ball valve, a filter and a one-way valve are arranged in sequence on the water inlet pipeline from the water inlet to the end water tank 2.

[0037] The connecting member includes two upper straps 41 and two lower straps 42, and the upper straps 41 and the lower straps 42 are connected between the two connecting brackets 4. In this embodiment, the upper straps 41 and the lower straps 42 can be set as elastic structures to facilitate sleeves on the surface of the gas cylinder 1, and the upper straps 41 and / or the lower straps 42 can also be set as cable ties to facilitate fixing and clamping on the outer surface of the gas cylinder 1.

[0038] Embodiment 2:

[0039] Compared with Example 1, this embodiment makes adjustments to the specific structure of the connecting member. Considering that the connecting bracket 4 mainly plays a supporting and guiding role, the error in the length of the upper binding belt 41 and the lower binding belt 42 is likely to affect the connection between the guide rail and the guide slot 401.

[0040] like Figure 3 As shown, the connecting member includes an elastic band 43, a first connecting band and a second connecting band. Each end of the elastic band 43 is fixedly connected to a corresponding connecting bracket 4, one end of the first connecting band is rotatably connected to one of the connecting brackets 4, the other end of the first connecting band is fixedly connected to a hoop shell 5, a length adjustment component is arranged in the hoop shell 5, and an installation gap for inserting the second connecting band is provided on the hoop shell 5, one end of the second connecting band is rotatably connected to another connecting bracket 4, and the other end of the second connecting band is provided with a plurality of tooth holes. When the end of the second connecting band is inserted into the installation gap, the length adjustment component cooperates with the tooth holes to adjust the overlapping length of the first connecting band and the second connecting band and stretch the elastic band 43 to adjust the position of the two connecting brackets 4. In this embodiment, the length adjustment component can be pre-installed, the elastic band 43 can be stretched, and then the relative position of the two mounting brackets can be adjusted by the overlapping length of the first connecting band and the second connecting band, thereby adjusting the position of the connecting bracket 4 while ensuring the connection effect, and the installation is convenient.

[0041] Furthermore, the length adjustment assembly includes a first worm 51 and a second worm 52, the axes of which are arranged in parallel, and the first worm 51 and the second worm 52 are both rotatably connected to the hoop shell 5, the rotation directions of the first worm 51 and the second worm 52 are opposite, the tooth hole includes a first connecting hole 451 and a second connecting hole 452, the first connecting hole 451 is adapted to the first worm 51, and the second connecting hole 452 is adapted to the second worm 52, when the first worm 51 and the second worm 52 are rotated in opposite directions, the overlapping length of the second connecting belt and the first connecting belt can be extended or shortened.

[0042] Furthermore, the hoop shell 5 is rotatably connected with a first gear 511 and a second gear 521, the first gear 511 and the first worm 51 are coaxially fixedly connected, the second gear 521 and the second worm 52 are coaxially fixedly connected, and the first gear 511 and the second gear 521 are meshed with each other so as to be able to rotate synchronously in opposite directions.

[0043] Further, one end of the first worm 51 is exposed from the hoop shell 5 and a first groove is formed on the end surface, and one end of the second worm 52 is exposed from the hoop shell 5 and a second groove is formed on the end surface. The first groove and the second groove are provided to facilitate the use of a screwdriver to rotate the first worm 51 and the second worm 52. The first gear 511 and the second gear 521 are both exposed from the hoop shell 5. The hoop shell 5 is provided with a locking assembly, which includes a rotating rod 53 and a torsion spring (not shown in the figure). The rotating rod 53 is rotatably mounted on the hoop shell 5. A limiting portion is formed on the rotating rod 53. The shape of the limiting portion is adapted to the tooth shape of the first gear 511 or the second gear 521. The torsion spring is installed on the rotating shaft of the rotating rod 53. The torsion spring is used to drive the limiting portion to engage with the first gear 511 or the second gear 521 to limit the rotation of the first gear 511 and the second gear 521. In this embodiment, since the first gear 511 and the second gear 521 are meshed, the anti-loosening effect can be achieved by limiting the rotation of one of them.

[0044] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An oxygen and water storage system for an underwater fuel cell system with convenient connection, characterized in that: The oxygen and water storage system comprises An oxygen storage system, the oxygen storage system comprising a gas cylinder (1), A water storage system, the water storage system comprising two end water tanks (2) and two bottom water tanks (3), the two end water tanks (2) being respectively arranged at the two ends of a gas cylinder (1), the surface shape of the end water tank (2) close to the gas cylinder (1) being adapted to the shape of the gas cylinder (1), the two bottom water tanks (3) being arranged at the bottom of the gas cylinder (1), the surface shape of the bottom water tank (3) close to the gas cylinder (1) being adapted to the shape of the gas cylinder (1) and providing support for the gas cylinder (1), A combined guide assembly, the combined guide assembly is used to provide guidance for the connection between the gas cylinder (1) and the two end water tanks (2), A locking assembly is used to lock the gas cylinder (1) and the end water tank (2) and clamp the two bottom water tanks (3) between the two end water tanks (2).

2. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 1, characterized in that: The combined guide assembly comprises two connecting brackets (4) and a connecting piece. The two connecting brackets (4) are arranged on both sides of the central axis of the gas cylinder (1). The connecting piece connects the two connecting brackets (4) into one and forms an annular structure. When the annular structure is sleeved on the outside of the gas cylinder (1), the connecting bracket (4) is positioned against the outer surface of the gas cylinder (1). The connecting bracket (4) is extended along the central axis of the gas cylinder (1). Both ends of the connecting bracket (4) are provided with guide slide grooves (401). Both sides of the end water tank (2) are fixedly connected with guide sliders, and each of the guide sliders is slidably matched with one of the guide slide grooves (401).

3. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 2, characterized in that: The connecting member comprises two upper binding straps (41) and two lower binding straps (42), and the upper binding straps (41) and the lower binding straps (42) are both connected between the two connecting brackets (4).

4. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 2, characterized in that: The connecting member comprises an elastic band (43), a first connecting band and a second connecting band, each end of the elastic band (43) is fixedly connected to a corresponding connecting bracket (4), one end of the first connecting band is rotatably connected to one of the connecting brackets (4), the other end of the first connecting band is fixedly connected to a hoop shell (5), a length adjustment component is arranged in the hoop shell (5), an installation gap for inserting the second connecting band is opened on the hoop shell (5), one end of the second connecting band is rotatably connected to another connecting bracket (4), the other end of the second connecting band is opened with a plurality of tooth holes, when the end of the second connecting band is inserted into the installation gap, the length adjustment component cooperates with the tooth holes to adjust the overlapping length of the first connecting band and the second connecting band and stretch the elastic band (43) to adjust the positions of the two connecting brackets (4).

5. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 4, characterized in that: The length adjustment component comprises a first worm (51) and a second worm (52), the axes of the first worm (51) and the second worm (52) are arranged in parallel, and the first worm (51) and the second worm (52) are both rotatably connected to the hoop shell (5), the first worm (51) and the second worm (52) have opposite rotation directions, the tooth hole comprises a first connecting hole (451) and a second connecting hole (452), the first connecting hole (451) is adapted to the first worm (51), and the second connecting hole (452) is adapted to the second worm (52), when the first worm (51) and the second worm (52) are rotated in opposite directions, the overlapping length of the second connecting belt and the first connecting belt can be extended or shortened.

6. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 4, characterized in that: A first gear (511) and a second gear (521) are rotatably connected to the hoop shell (5); the first gear (511) and the first worm gear (51) are coaxially fixedly connected; the second gear (521) and the second worm gear (52) are coaxially fixedly connected; the first gear (511) and the second gear (521) are meshed with each other.

7. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 6, characterized in that: One end of the first worm (51) is exposed from the hoop shell (5) and a first groove is formed on the end surface; one end of the second worm (52) is exposed from the hoop shell (5) and a second groove is formed on the end surface; the first gear (511) and the second gear (521) are both exposed from the hoop shell (5); a locking assembly is provided on the hoop shell (5); the locking assembly comprises a rotating rod (53) and a torsion spring; the rotating rod (53) is rotatably mounted on the hoop shell (5); a limiting portion is formed on the rotating rod (53); the shape of the limiting portion is adapted to the tooth shape of the first gear (511) or the second gear (521); the torsion spring is mounted on the rotating shaft of the rotating rod (53); the torsion spring is used to drive the limiting portion to engage with the first gear (511) or the second gear (521) to limit the rotation of the first gear (511) and the second gear (521).

8. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 1, characterized in that: Both ends of the gas cylinder (1) are provided with nozzles (11), and the locking assembly comprises a radial limit nut (6) and an axial locking nut (7). The radial limit nut (6) is threadedly connected to the nozzle (11), and the radial limit nut (6) is hexagonal in shape. A limit hole is provided on the end water tank, and the limit hole is sleeved on the outside of the radial limit nut (6) to limit the radial relative rotation of the end water tank (2) and the gas cylinder (1). The axial locking nut (7) is threadedly connected to the nozzle (11) and abuts against the end face of the end water tank away from the gas cylinder (1) to limit the axial relative displacement of the end water tank (2) and the gas cylinder (1).

9. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 1, characterized in that: A first water pipe and a second water pipe are connected between the bottom water tank (3) and the end water tank (2) located at the same end of the gas cylinder (1); the first water pipe is arranged below the second water pipe, and the connection position between the second water pipe and the end water tank (2) is higher than the connection position between the second water pipe and the bottom water tank (3).

10. The oxygen and water storage system for an underwater fuel cell system with convenient connection according to claim 8, characterized in that: The bile nozzle (11) is connected to an air inlet and a pressure relief assembly, and the pressure relief mechanism comprises an air pipeline, on which a high-pressure stop valve, a high-pressure solenoid valve, a low-pressure sensor and a pressure reducing valve are sequentially arranged.

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