CN217473022U

CN217473022U - Module combined type energy-saving nitrogen making machine

Info

Publication number: CN217473022U
Application number: CN202221372696.7U
Authority: CN
Inventors: 姜祖国; 宋光林
Original assignee: Suzhou Hongjinli Gas Equipment Co ltd
Current assignee: Suzhou Hongjinli Gas Equipment Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-09-23
Anticipated expiration: 2032-06-02

Abstract

The utility model discloses an energy-conserving nitrogen machine of module combination formula relates to nitrogen machine technical field. The utility model discloses a base, the base top is provided with nitrogen making mechanism, nitrogen making mechanism includes the compressed air intake pipe, set up in the gas-supply pipe of compressed air intake pipe one side, set up in the left adsorption tower in base top, set up in the inside nitrogen gas outlet duct that is linked together of nitrogen gas technology jar and one end and nitrogen gas technology jar on base top right side, the adsorption tower is linked together with the gas-supply pipe, through pipe connection between nitrogen gas technology jar and the adsorption tower, be provided with filtering mechanism between compressed air intake pipe and the gas-supply pipe, filtering mechanism includes the active carbon filtration jar, first solid fixed ring, the solid fixed ring of second, first dead lever, the second dead lever, the connecting rod, connecting piece and filter equipment. The utility model discloses a filter mechanism who sets up, convenient maintenance and change filter equipment have guaranteed the result of use of device.

Description

Module combined type energy-saving nitrogen making machine

Technical Field

The utility model belongs to the technical field of the nitrogen generator, especially, relate to an energy-conserving nitrogen generator of module combination formula.

Background

The nitrogen generator is a device which takes air as a raw material and obtains nitrogen by separating oxygen and nitrogen in the air by a physical method. The nitrogen producing machines used in industry are classified into three types, i.e., a cryogenic air separation method, a molecular sieve air separation method (PSA nitrogen production), and a membrane air separation method, according to the classification method.

The method for separating nitrogen from oxygen by using air as a raw material and a carbon molecular sieve as an adsorbent and utilizing the pressure swing adsorption principle and the selective adsorption of the carbon molecular sieve on the oxygen and the nitrogen is generally called PSA nitrogen preparation, and compared with the traditional nitrogen preparation method, the method has the characteristics of simple process flow, high automation degree, fast gas production (15-30 minutes), low energy consumption, product purity capable of being adjusted in a larger range according to the needs of users, convenient operation and maintenance, lower operation cost, stronger device adaptability and the like, so the method has competitive power in nitrogen preparation equipment with the speed of 1000Nm3/h and is more and more popular among medium and small nitrogen users, and the PSA nitrogen preparation becomes a preferred method for the medium and small nitrogen users.

In the use process of the existing nitrogen making machine, because compressed air contains a plurality of impurities: like water smoke, vapor rubber powder, tar particles and chemical peculiar smell substances, compressed air generally needs to be filtered in the nitrogen making process, compressed air is generally filtered by an activated carbon filter in the prior art, but the conventional filter is inconvenient to maintain and replace a filtering device, so that the using effect of the device is influenced, and therefore, the module combined type energy-saving nitrogen making machine is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an energy-conserving nitrogen machine of module combination formula solves current nitrogen machine in the use, because contain a lot of impurity in the compressed air: such as water mist, steam rubber powder, tar particles, chemical peculiar smell substances and the like, compressed air generally needs to be filtered in the nitrogen preparation process, and the compressed air is generally filtered by an activated carbon filter in the prior art, but the conventional filter is inconvenient to maintain and replace a filtering device, so that the using effect of the device is influenced.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a module combination type energy-saving nitrogen making machine, which comprises a base, the top of the base is provided with a nitrogen making mechanism, the nitrogen making mechanism comprises a compressed air inlet pipe, a gas conveying pipe arranged on one side of the compressed air inlet pipe, an adsorption tower arranged on the left side of the top of the base, a nitrogen process tank arranged on the right side of the top of the base and a nitrogen outlet pipe with one end communicated with the inside of the nitrogen process tank, the adsorption tower is communicated with the gas conveying pipe, the nitrogen process tank is connected with the adsorption tower through a pipe, and a filtering mechanism is arranged between the compressed air inlet pipe and the gas conveying pipe;

the filtering mechanism comprises an active carbon filtering tank, a first fixing ring, a second fixing ring, a first fixing rod, a second fixing rod, connecting rods, connecting pieces and filtering devices, wherein the active carbon filtering tank is of a cylindrical structure and is fixedly connected to the top of the base, the first fixing ring and the second fixing ring are both arranged in the active carbon filtering tank, the second fixing ring is positioned below the first fixing ring, the first fixing rod and the second fixing rod are respectively and fixedly connected to two sides of one side surface opposite to the bottom of the first fixing ring and the bottom of the second fixing ring, a plurality of connecting rods are arranged between the first fixing rod and the second fixing rod, two adjacent connecting rods, the connecting rods and the first fixing rod and the connecting rods and the second fixing rod are connected through the connecting pieces, each connecting piece is provided with a filtering device, and the top and the bottom of the active carbon filtering tank are respectively provided with an air inlet and an air outlet, the air inlet and the air outlet are respectively and fixedly provided with an air inlet pipe and one end of an air outlet pipe, the other end of the air inlet pipe is fixedly connected with a compressed air inlet pipe through a first flange, and the other end of the air outlet pipe is fixedly connected with a gas conveying pipe through a second flange;

the connecting piece comprises first threaded cylinders, second threaded cylinders and threaded columns, wherein the number of the first threaded cylinders is two, the two first threaded cylinders are movably connected to one end, opposite to the first fixed rod, of the second fixed rod respectively, the second threaded cylinders are provided with multiple groups, the multiple groups of the second threaded cylinders are movably connected to two ends of corresponding connecting rods respectively, two adjacent second threaded cylinders and the first threaded cylinders are connected through the threaded columns, the two groups of first threaded cylinders are slidably connected to the first fixed rod and the second fixed rod respectively, the multiple groups of second threaded cylinders are slidably connected to two ends of corresponding connecting rods respectively, the first threaded cylinders and the second threaded cylinders are connected with two ends of the threaded columns through threads, and the inner threads arranged on the inner walls of the first threaded cylinders and the second threaded cylinders are opposite in rotating direction;

the filter device comprises a shell and a filter layer, the shell is of a circular structure and is provided with a plurality of air holes, the air holes are formed in the top and the bottom of the shell, the diameter of the shell is smaller than the inner diameter of the activated carbon filter tank, the air holes are multiple, the air holes are arranged on the shell, threaded through holes are formed in the two sides of the top of the shell, and the threaded through holes are matched with threaded columns.

Preferably, a silencing barrel is arranged on the nitrogen outlet pipe, the bottom end of the silencing barrel is fixedly connected with the base, and noise generated during exhaust is eliminated by the silencing barrel.

Preferably, the bottom of the activated carbon filter tank is fixedly connected with a support, and the bottom of the support is fixedly connected to the base.

Preferably, the activated carbon filter tank comprises a tank body and a tank cover, the tank cover is arranged at the top of the tank body, a first connecting ring is fixedly connected to the top of the peripheral side face of the tank body, a second connecting ring is fixedly connected to the bottom of the peripheral side face of the tank cover, and the first connecting ring is connected with the second connecting ring through a bolt.

Preferably, both sides of the top of the first fixing ring are fixedly connected with hanging rings, and the first fixing ring is conveniently hoisted through the matching of a rope and the hanging rings.

Preferably, fixedly connected with ring packing is gone up to casing week side, the ring packing surface laminates with the active carbon filter tank inner wall, and ring packing has elasticity, seals the gap between casing outer wall and the active carbon filter tank inner wall.

Preferably, the filter mechanism still includes spacing subassembly, spacing subassembly includes support ring, ring body, elastic component and arc clamp plate, support ring fixed connection is on jar internal wall, the solid fixed ring of second is located the support ring top, ring body fixed connection is on the cover inner wall, elastic component one end fixed connection is in the ring body bottom, arc clamp plate fixed connection is on the elastic component other end, and the arc clamp plate is located the solid fixed ring top of first, and the support ring plays the supporting role to the solid fixed ring of second, and support ring, ring body, elastic component and arc clamp plate cooperation play limiting role to the solid fixed ring of second and first solid fixed ring.

The utility model discloses following beneficial effect has:

the utility model discloses a filter mechanism that sets up, when needing to change filter equipment, at first make active carbon filter jar intake pipe and compressed air intake pipe break away from, make cover and jar body separation through rotating the bolt, fix the rope on the rings at first solid fixed ring top, hang out first solid fixed ring to the active carbon filter jar outside through the hoist, through rotating first thread section of thick bamboo and second thread section of thick bamboo, make first thread section of thick bamboo, second thread section of thick bamboo break away from the screw thread post, thereby take out filter equipment, make casing and screw thread post separation through rotating the screw thread post, thereby change casing and the filter layer inside the casing, make its threaded connection on the casing after changing through rotating the screw thread post, and make the length of the outside of casing of screw thread post both ends spill equally, place a plurality of casings between first dead lever and connecting rod in proper order, between two adjacent connecting rods and between second dead lever and the connecting rod, the filtering device and the threaded column are fixed between the first fixed rod and the connecting rod, between two adjacent connecting rods and between the second fixed rod and the connecting rod by sequentially and reversely rotating the first threaded cylinder and the second threaded cylinder, thereby the filtering device is fixed between the first fixing ring and the second fixing ring, the first fixing ring is placed in the active carbon filtering tank through the matching of the lifting appliance, the rope and the lifting ring, the supporting ring plays a role in supporting the second fixing ring, the tank cover is fixed at the top of the tank body through bolts, a ring body, an elastic piece and an arc-shaped pressing plate which are arranged on the inner wall of the tank cover are matched to extrude the first fixing ring, thereby limiting the first fixing ring and the second fixing ring, connecting the air inlet pipe of the activated carbon filter tank with the compressed air inlet pipe through the first flange, thereby accomplishing the replacement, facilitating the maintenance and the replacement of the filtering device and ensuring the use effect of the device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of the module combined energy-saving nitrogen generator of the present invention;

fig. 2 is a top view of the activated carbon filtering tank of the module combined energy-saving nitrogen generator of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A in FIG. 2 of the modular combined energy-saving nitrogen generator of the present invention;

FIG. 4 is an enlarged view of the module-combined energy-saving nitrogen generator of the present invention at B in FIG. 3;

fig. 5 is an enlarged view of the C position in fig. 3 of the module combined energy-saving nitrogen generator of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base; 2. a compressed air inlet pipe; 3. a gas delivery pipe; 4. an adsorption tower; 5. a nitrogen process tank; 6. a nitrogen outlet pipe; 7. a conduit; 8. an activated carbon filter tank; 801. a tank body; 802. a can lid; 9. a first retaining ring; 10. a second retaining ring; 11. a first fixing lever; 12. a second fixing bar; 13. a connecting rod; 14. a connecting member; 15. a filtration device; 16. a first threaded barrel; 17. a second threaded barrel; 18. a threaded post; 19. a housing; 20. a filter layer; 21. a hoisting ring; 22. an annular seal ring; 23. a support ring; 24. a ring body; 25. an elastic member; 26. an arc-shaped pressing plate.

Detailed Description

In order to make the utility model realize, the technical means, the creation characteristics, the achievement purpose and the efficacy are easy to understand and understand, the utility model is further explained by combining the specific implementation mode.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1-5, the utility model relates to a module combination type energy-saving nitrogen making machine, which comprises a base 1, the top of the base 1 is provided with a nitrogen making mechanism, the nitrogen making mechanism comprises a compressed air inlet pipe 2, a gas pipe 3 arranged on one side of the compressed air inlet pipe 2, an adsorption tower 4 arranged on the left side of the top of the base 1, a nitrogen process tank 5 arranged on the right side of the top of the base 1 and a nitrogen outlet pipe 6 with one end communicated with the inside of the nitrogen process tank 5, the adsorption tower 4 is communicated with the gas pipe 3, the nitrogen process tank 5 is connected with the adsorption tower 4 through a conduit 7, and a filtering mechanism is arranged between the compressed air inlet pipe 2 and the gas pipe 3;

the filtering mechanism comprises an activated carbon filtering tank 8, a first fixing ring 9, a second fixing ring 10, a first fixing rod 11, a second fixing rod 12, connecting rods 13, connecting pieces 14 and filtering devices 15, wherein the activated carbon filtering tank 8 is of a cylindrical structure and is fixedly connected to the top of a base 1, the first fixing ring 9 and the second fixing ring 10 are both arranged inside the activated carbon filtering tank 8, the second fixing ring 10 is positioned below the first fixing ring 9, the first fixing rod 11 and the second fixing rod 12 are respectively and fixedly connected to two sides of the opposite side surface of the bottoms of the first fixing ring 9 and the second fixing ring 10, a plurality of connecting rods 13 are arranged between the first fixing rod 11 and the second fixing rod 12, the connecting rods 13 and the first fixing rod 11, and the connecting rods 13 and the second fixing rod 12 are connected through the connecting pieces 14, and each connecting piece 14 is provided with a filtering device 15, an air inlet and an air outlet are respectively formed in the top and the bottom of the activated carbon filter tank 8, an air inlet pipe and one end of an air outlet pipe are respectively and fixedly arranged in the air inlet and the air outlet, the other end of the air inlet pipe is fixedly connected with the compressed air inlet pipe 2 through a first flange, and the other end of the air outlet pipe is fixedly connected with the air delivery pipe 3 through a second flange;

the connecting piece 14 comprises a first thread cylinder 16, a second thread cylinder 17 and a thread column 18, two groups of the first thread cylinders 16 are respectively movably connected with one end of the first fixed rod 11 opposite to the second fixed rod 12, a plurality of groups of the second thread cylinders 17 are respectively movably connected with two ends of the corresponding connecting rod 13, two adjacent second thread cylinders 17 are connected with each other through the thread column 18 and the second thread cylinders 17 are connected with the first thread cylinders 16, two groups of the first thread cylinders 16 are respectively slidably connected with the first fixed rod 11 and the second fixed rod 12, a plurality of groups of the second thread cylinders 17 are respectively slidably connected with two ends of the corresponding connecting rod 13, the first thread cylinders 16 are connected with two ends of the second thread cylinders 17 and the thread column 18 through threads, the inner threads on the inner walls of the first threaded cylinder 16 and the second threaded cylinder 17 are opposite in rotating direction;

filter equipment 15 includes casing 19 and filter layer 20, casing 19 is circular structure and has a plurality ofly, and every filter equipment 15 sets up respectively on the connecting piece 14 that corresponds, filter layer 20 sets up inside casing 19, the bleeder vent has all been seted up with the bottom at casing 19 top, casing 19 diameter is less than the active carbon and filters jar 8 internal diameters, the bleeder vent has a plurality ofly, and a plurality of bleeder vent annular arrays are on casing 19, the screw thread through-hole has all been seted up to casing 19 top both sides, screw thread through-hole and screw thread post 18 phase-match.

Wherein, the nitrogen outlet pipe 6 is provided with a silencing barrel, the bottom end of the silencing barrel is fixedly connected with the base 1, and the silencing barrel eliminates noise generated during exhaust.

Wherein, the bottom of the active carbon filter tank 8 is fixedly connected with a support, and the bottom of the support is fixedly connected on the base 1.

The activated carbon filter tank 8 comprises a tank body 801 and a tank cover 802, wherein the tank cover 802 is arranged at the top of the tank body 801, a first connecting ring is fixedly connected to the top of the peripheral side of the tank body 801, a second connecting ring is fixedly connected to the bottom of the peripheral side of the tank cover 802, and the first connecting ring and the second connecting ring are connected through bolts.

Wherein, the both sides of first fixed ring 9 top all fixedly connected with rings 21, be convenient for hoist first fixed ring 9 through rope and rings 21 cooperation.

Wherein, fixedly connected with ring packing 22 on 19 week sides of casing, ring packing 22 surface and the laminating of 8 inner walls of active carbon filtration jar mutually, ring packing 22 has elasticity, seals the gap between 19 outer walls of casing and the 8 inner walls of active carbon filtration jar.

Wherein, the filter mechanism still includes spacing subassembly, spacing subassembly includes support ring 23, ring body 24, elastic component 25 and arc clamp plate 26, support ring 23 fixed connection is on jar body 801 inner wall, solid fixed ring 10 of second is located support ring 23 top, ring body 24 fixed connection is on cover 802 inner wall, elastic component 25 one end fixed connection is in ring body 24 bottom, arc clamp plate 26 fixed connection is on the elastic component 25 other end, and arc clamp plate 26 is located first solid fixed ring 9 top, support ring 23 plays the supporting role to solid fixed ring 10 of second, and support ring 23, ring body 24, elastic component 25 and the cooperation of arc clamp plate 26 play limiting role to solid fixed ring 10 of second and first solid fixed ring 9.

The utility model discloses a theory of operation does: when the filter device 15 needs to be replaced, firstly, the air inlet pipe of the activated carbon filter tank 8 is separated from the compressed air inlet pipe 2, then the tank cover 802 is separated from the tank body 801 by rotating the bolt, the rope is fixed on the hanging ring 21 at the top of the first fixing ring 9, the first fixing ring 9 is hung out of the activated carbon filter tank 8 by the hanging tool, the first threaded cylinder 16 and the second threaded cylinder 17 are separated from the threaded column 18 by rotating the first threaded cylinder 16 and the second threaded cylinder 17, so that the filter device 15 is taken out, the shell 19 is separated from the threaded column 18 by rotating the threaded column 18, so that the shell 19 and the filter layer 20 in the shell 19 are replaced, the threaded column 18 is connected to the replaced shell 19 by rotating the threaded column 18, the length of the two ends of the threaded column 18 leaking out of the outer side of the shell 19 is equal, and a plurality of shells 19 are sequentially placed between the first fixing rod 11 and the connecting rod 13, Between two adjacent connecting rods 13, between the second fixing rod 12 and the connecting rod 13, the filtering device 15 and the threaded column 18 are fixed between the first fixing rod 11 and the connecting rod 13, between two adjacent connecting rods 13, and between the second fixing rod 12 and the connecting rod 13 by reversely rotating the first threaded cylinder 16 and the second threaded cylinder 17 in turn, so that the filtering device 15 is fixed between the first fixing ring 9 and the second fixing ring 10, the first fixing ring 9 is placed inside the activated carbon filter tank 8 by matching a lifting appliance and a rope with the lifting ring 21, the support ring 23 supports the second fixing ring 10, the tank cover 802 is fixed at the top of the tank body 801 by bolts, the ring body 24 arranged on the inner wall of the tank cover 802, the elastic part 25 and the arc-shaped pressure plate 26 are matched to extrude the first fixing ring 9, so as to limit the first fixing ring 9 and the second fixing ring 10, make 8 intake pipes of active carbon filtration jar and compressed air intake pipe 2 be connected through first flange to accomplish the change, convenient maintenance and change filter equipment 15 have guaranteed the result of use of device.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an energy-conserving nitrogen machine of module combination formula which characterized in that: the nitrogen production device comprises a base (1), wherein a nitrogen production mechanism is arranged at the top of the base (1), the nitrogen production mechanism comprises a compressed air inlet pipe (2), a gas pipe (3) arranged on one side of the compressed air inlet pipe (2), an adsorption tower (4) arranged on the left side of the top of the base (1), a nitrogen process tank (5) arranged on the right side of the top of the base (1) and a nitrogen gas outlet pipe (6) of which one end is communicated with the inside of the nitrogen process tank (5), the adsorption tower (4) is communicated with the gas pipe (3), the nitrogen process tank (5) is connected with the adsorption tower (4) through a guide pipe (7), and a filtering mechanism is arranged between the compressed air inlet pipe (2) and the gas pipe (3);

the filtering mechanism comprises an activated carbon filtering tank (8), a first fixing ring (9), a second fixing ring (10), a first fixing rod (11), a second fixing rod (12), a connecting rod (13), a connecting piece (14) and a filtering device (15), wherein the activated carbon filtering tank (8) is of a cylindrical structure and is fixedly connected to the top of the base (1), the first fixing ring (9) and the second fixing ring (10) are arranged inside the activated carbon filtering tank (8), the second fixing ring (10) is arranged below the first fixing ring (9), the first fixing ring (9) and the second fixing ring (10) are fixedly connected to the two sides of the bottom opposite side of the bottom of the first fixing ring (11) and the second fixing ring (10) respectively, a plurality of connecting rods (13) are arranged between the first fixing rod (11) and the second fixing rod (12), and two adjacent connecting rods (13), The connecting rod (13) and the first fixing rod (11) and the connecting rod (13) and the second fixing rod (12) are connected through connecting pieces (14), and each connecting piece (14) is provided with a filtering device (15);

the connecting piece (14) comprises first threaded cylinders (16), second threaded cylinders (17) and threaded columns (18), two groups of the first threaded cylinders (16) are respectively and movably connected to one ends, opposite to the first fixing rod (11) and the second fixing rod (12), of the first threaded cylinders (16), multiple groups of the second threaded cylinders (17) are respectively and movably connected to two ends of the corresponding connecting rod (13), and two adjacent second threaded cylinders (17) and the first threaded cylinders (16) are connected through the threaded columns (18);

filter equipment (15) include casing (19) and filter layer (20), casing (19) are circular structure and have a plurality ofly, and every filter equipment (15) set up respectively on connecting piece (14) that correspond, filter layer (20) set up inside casing (19), the bleeder vent has all been seted up to casing (19) top and bottom.

2. The module combined type energy-saving nitrogen making machine according to claim 1, wherein a silencing barrel is arranged on the nitrogen gas outlet pipe (6), and the bottom end of the silencing barrel is fixedly connected with the base (1).

3. The energy-saving nitrogen making machine of the module combination type as claimed in claim 2, wherein the bottom of the activated carbon filter tank (8) is fixedly connected with a support.

4. The modular combined energy-saving nitrogen generator as claimed in claim 3, wherein the activated carbon filter tank (8) comprises two parts of a tank body (801) and a tank cover (802), and the tank cover (802) is arranged on the top of the tank body (801).

5. The energy-saving nitrogen making machine of the module combination type according to claim 4, characterized in that both sides of the top of the first fixing ring (9) are fixedly connected with hanging rings (21).

6. The energy-saving nitrogen making machine of the module combination type according to claim 1, characterized in that the circumferential side of the shell (19) is fixedly connected with an annular sealing ring (22), and the outer surface of the annular sealing ring (22) is attached to the inner wall of the activated carbon filter tank (8).

7. The energy-conserving nitrogen generator of a module combination formula of claim 6, characterized in that, the filtering mechanism further includes a limiting component, the limiting component includes a supporting ring (23), a ring body (24), an elastic component (25) and an arc-shaped pressing plate (26), the supporting ring (23) is fixedly connected on the inner wall of the tank body (801), the second fixing ring (10) is located at the top of the supporting ring (23), the ring body (24) is fixedly connected on the inner wall of the tank cover (802), one end of the elastic component (25) is fixedly connected at the bottom of the ring body (24), the arc-shaped pressing plate (26) is fixedly connected at the other end of the elastic component (25), and the arc-shaped pressing plate (26) is located at the top of the first fixing ring (9).