Liquid storage tank with good cleaning effect

Abstract

The utility model relates to a liquid storage tank with a good cleaning effect, which comprises a tank body, a liquid storage cavity is arranged in the tank body, a feed port and a discharge port which are communicated with the liquid storage cavity are arranged on the surface of the tank body, a drain outlet is arranged at the bottom of the tank body, a rotation driving part is arranged at the top of the tank body, and the rotation driving part is connected with the liquid storage cavity. A rotating rod connected with the rotating driving part is arranged in the liquid storage cavity, the rotating rod is connected with at least one scrubbing assembly, the scrubbing assembly comprises a connecting frame and a scrubbing block, an elastic part is arranged between the connecting frame and the scrubbing block, and the two ends of the elastic part abut against the connecting frame and the scrubbing block. A scrubbing layer is arranged on the side, close to the side wall of the tank body, of the scrubbing block, the scrubbing layer makes contact with the side wall of the tank body, a water spraying assembly is arranged at the top of the liquid storage cavity, and the water spraying assembly comprises a plurality of transversely-arranged first spray heads and a plurality of longitudinally-arranged second spray heads. The brushing assembly capable of rotating along with the rotating rod is arranged in the tank body to clean the side wall in the tank body, manual cleaning is not needed, the cleaning efficiency and safety are high, in addition, a water spraying assembly is further arranged at the top of the liquid storage cavity and comprises a plurality of first spray heads and second spray heads, and the water spraying assembly is convenient to clean. And water can be sprayed into the tank body in all directions, and the cleaning effect can be remarkably improved in cooperation with the scrubbing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid storage tanks, in particular to a liquid storage tank with good cleaning effect. Background Art

[0002] Liquid storage tanks are a common liquid storage device, widely used for the storage and transportation of liquids in industries such as chemical, printing and dyeing, pharmaceuticals, and environmental protection. In the field of chemical technology, liquid storage tanks are often used to store chemical raw materials and chemical concentrates. For safety reasons, a liquid storage tank can usually only store one concentrate. When a different concentrate is needed, the tank must be cleaned to remove any residual liquid inside to avoid contamination of the newly stored liquid.

[0003] At present, manual operation is usually used to clean the liquid storage tank, and the inside of the liquid storage tank may be flushed. When it comes to some larger liquid storage tanks, workers may need to enter the interior for flushing. This method has low cleaning efficiency and is not easy to clean the residual materials on the side walls. Especially after some materials with higher density and viscosity are placed in the liquid storage tank, there are more materials attached and remaining on the side walls, which are more difficult to clean. The cleaning of the side walls becomes very difficult. Simple flushing cannot effectively remove the residual materials on the side walls, resulting in contamination of subsequent materials. In addition, if the liquid storage tank has stored some toxic and hazardous chemicals, manual cleaning may also cause certain harm to the workers, and the risk factor is relatively high. Utility Model Content

[0004] In view of this, in order to solve the problems existing in the above-mentioned prior art, the utility model provides a liquid storage tank with good cleaning effect.

[0005] The cleaning agent disposes the cleaning agent in a manner that allows the cleaning agent to be removed from the cleaning container and the cleaning surface of the cleaning container to move relative to the cleaning agent.

[0006] In the above technical solution, the liquid storage cavity inside the tank body is used to store liquid materials, the feed port and the discharge port are arranged on the side wall of the tank body for the entry and exit of materials, the top end of the rotating rod passes through the top of the tank body and is connected to the output end of the rotating drive member, the rotating rod is connected to a brush assembly, the brush assembly can rotate with the rotating rod, the brush assembly includes a connecting frame and a brush block, an elastic member is provided between the connecting frame and the brush block, through the elastic force of the elastic member, the side of the brush block provided with the brush layer is always in close contact with the side wall of the tank body, and then with the rotation of the rotating rod, the brush layer is moved along the side wall of the tank body Move to fully scrape off the residual materials on the side wall and clean the side wall of the tank body. In addition, a water spray component is provided on the top of the liquid storage chamber, which is connected to the water supply device outside the tank body. It includes multiple first nozzles and second nozzles. The first nozzle is horizontally placed and can spray water onto the side wall inside the tank body, and cooperate with the rotating brush block to brush the side wall to enhance the cleaning effect. The longitudinally placed second nozzle sprays in a vertical direction to help clean the brush component below and the bottom of the tank body. The sewage after cleaning the inside of the tank body is discharged from the sewage outlet at the bottom of the tank body.

[0007] As an optional implementation, the scrubbing layer is a soft structure with elasticity.

[0008] In the above technical solution, the scrubbing layer has a certain elasticity to enhance the fit with the side wall of the tank body, which can more effectively scrape off the dirt on the side wall and ensure the cleaning effect while also ensuring that no damage is caused to the side wall of the tank body.

[0009] As an optional embodiment, the connecting frame includes a mounting block, a cavity for accommodating the elastic member is provided inside the mounting block, a connecting rod is connected to the side of the brushing block opposite to the brushing layer, a hole for inserting the connecting rod is provided at the end of the mounting block, one end of the connecting rod is inserted into the mounting block, and is abutted against the elastic member inside the mounting block.

[0010] In the above technical solution, the elastic member is installed in the cavity of the mounting block, one end of which abuts against the bottom surface of the cavity and the other end abuts against the inserted connecting rod. By setting the mounting block, the elastic force direction of the elastic member is limited to the horizontal direction.

[0011] As an optional embodiment, a limiting ring is provided at one end of the connecting rod extending into the interior of the mounting block.

[0012] In the above technical solution, the limiting ring abuts against the side surface inside the mounting block to limit the connecting rod so that it can only move in the horizontal direction.

[0013] As an optional embodiment, the connecting frame further includes a connecting block, one side of the connecting block is connected to the rotating rod, and the other side of the connecting block is connected to the mounting block.

[0014] In the above technical solution, the connecting block is fixedly connected to the rotating rod and rotates along with the rotating rod, and the mounting block is fixedly mounted on the connecting block.

[0015] As an optional embodiment, the water spray assembly includes a water supply ring and a water distribution plate that are arranged and connected up and down, and the water supply ring and the water distribution plate are both provided with holes for the rotating rod to pass through, and multiple first nozzles are arranged at intervals on the side of the water distribution plate, and multiple second nozzles are distributed on the bottom of the water distribution plate.

[0016] In the above technical solution, a water supply ring is installed on the top of the tank body, with its top end exposed on the outside of the tank body. The water supply ring is connected to an external water supply device through a pipeline. The interior of the water supply ring is hollow, and the water supply device sends cleaning water into the water supply ring through a pipeline. After passing through the water supply ring, the water enters the water distribution plate below. The water distribution plate guides the water to each first nozzle and the second nozzle, and the water is sprayed by the first nozzle and the second nozzle. Among them, the first nozzle is arranged on the side of the water distribution plate and is placed horizontally, so that water is sprayed onto the side wall of the tank body. The second nozzle is arranged at the bottom of the water distribution plate and is placed vertically, spraying water downward.

[0017] As an optional embodiment, a water delivery drive device is provided on the top of the tank body, and the water delivery drive device is connected to the water delivery ring through a pipeline.

[0018] In the above technical solution, the water delivery drive device is connected to the water supply area through a pipeline, and water is delivered to the water delivery ring through the power provided by the water delivery drive device.

[0019] As an optional embodiment, the bottom of the liquid storage chamber is provided with an inclined plate, and the sewage outlet is provided at the center position of the bottom of the tank body. The higher side of the inclined plate is connected to the side wall of the tank body, and the lower side is connected to the edge of the orifice of the sewage outlet.

[0020] In the above technical solution, the drain outlet is opened at the center of the bottom of the tank body and is connected to the internal liquid storage cavity. The inclined plate is located at the bottom of the liquid storage cavity. The higher side of the inclined plate is connected to the side wall of the tank body, and the other side is inclined downward and connected to the edge of the orifice of the drain outlet. The entire inclined plate is in an inverted cone shape, and the drain outlet is located at the bottom center of the inverted cone shape. By setting the inclined plate, the internal liquid is guided to the drain outlet for discharge, which can effectively avoid liquid accumulation inside the liquid storage tank, prevent contamination of newly stored liquid materials, and improve the reliability of the liquid storage tank.

[0021] As an optional embodiment, a plurality of supporting ribs are provided between the inclined plate and the bottom of the tank body.

[0022] In the above technical solution, the support ribs are used to provide support for the inclined plate, and to prevent the inclined plate from collapsing due to excessive force when materials are stored inside the tank body.

[0023] As an optional embodiment, a gas exhaust valve communicating with the liquid storage chamber is provided on the top of the tank body.

[0024] In the above technical solution, the exhaust valve can be used to help discharge the gas inside the tank body, relieve the pressure of the tank body, and help ensure the normal use of the liquid storage tank.

[0025] The beneficial effects of the present invention are:

[0026] The present application cleans the side walls inside the tank body by arranging a brushing assembly that can rotate with a rotating rod inside the tank body. No manual operation is required, and the cleaning efficiency and safety are high. The brushing assembly includes a connecting frame and a brushing block. An elastic member is provided between the connecting frame and the brushing block. Through the elastic force of the elastic member, the side of the brushing block provided with a brushing layer is always in close contact with the side wall of the tank body, thereby fully scraping off the residual material on the side wall, effectively improving the cleaning effect. In addition, a water spraying assembly is also provided on the top of the liquid storage chamber, which includes multiple first nozzles and a second nozzle, which can spray water on the inside of the tank body in all directions, and cooperate with the rotating brushing block to brush the side wall, significantly improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 Schematic diagram of the structure of a liquid storage tank according to an embodiment.

[0029] Figure 2 for Figure 1 Enlarged view of position A in the middle.

[0030] Figure 3 for Figure 2 Enlarged view of position B in the middle.

[0031] Figure 4 This is a structural schematic diagram of a liquid storage tank according to another embodiment of the present application.

[0032] Description of reference numerals in the figures:

[0033] 1-tank body; 11-liquid storage chamber; 111-inclined plate; 112-support rib; 12-feed port; 13-discharge port; 14-drainage port; 15-exhaust valve; 2-rotating drive member; 21-rotating rod; 22-connecting sleeve; 3-scrubbing assembly; 31-connecting block; 32-mounting block; 321-elastic member; 33-scrubbing block; 331-scrubbing layer; 34-connecting rod; 341-limiting ring; 4-water spray assembly; 41-water supply ring; 42-water distribution plate; 421-first nozzle; 422-second nozzle; 5-water supply drive device. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. Example 1

[0037] Please refer to Figures 1 to 3 In a preferred embodiment of the present application, a liquid storage tank with good cleaning effect is provided, including a tank body 1, a liquid storage chamber 11 is provided inside the tank body 1, a feed port 12 and a discharge port 13 connected to the liquid storage chamber 11 are provided on the surface of the tank body 1, a sewage outlet 14 is provided at the bottom of the tank body 1, a rotating driving member 2 is provided on the top of the tank body 1, a rotating rod 21 connected to the rotating driving member 2 is provided in the liquid storage chamber 11, and the rotating rod 21 is connected to a group of brushing components 3. The brushing component 3 includes a connecting frame and a brushing block 331, an elastic member 321 is provided between the connecting frame and the brushing block 331, and the two ends of the elastic member 321 are against the connecting frame and the brushing block 331. A brushing layer is provided on a side wall of the brushing block 331 close to the tank body 1, and the brushing layer contacts the side wall of the tank body 1. A water spraying component 4 is provided on the top of the liquid storage chamber 11, and the water spraying component 4 includes a plurality of horizontal first nozzles 421 and a plurality of vertical second nozzles 422.

[0038] In this embodiment, the liquid storage chamber 11 inside the tank body 1 is used to store liquid materials, and the feed port 12 and the discharge port 13 are arranged on the side wall of the tank body 1 for the entry and exit of materials. The top of the rotating rod 21 passes through the top of the tank body 1 and is connected to the output end of the rotating drive member 2. The rotating rod 21 is connected to a brush assembly 3, and the brush assembly 3 can rotate with the rotating rod 21. The brush assembly 3 includes a connecting frame and a brush block 331. An elastic member 321 is provided between the connecting frame and the brush block 331. Through the elastic force of the elastic member 321, the side of the brush block 331 with the brush layer is always in close contact with the side wall of the tank body 1, and then with the rotation of the rotating rod 21, the brush layer is moved along the tank body. 1 moves along the side wall, fully scrapes off the residual material on the side wall, and cleans the side wall of the tank body 1. In addition, a water spray component 4 is provided on the top of the liquid storage chamber 11, and the water spray component 4 is connected to the water supply device outside the tank body 1. It includes multiple first nozzles 421 and second nozzles 422. The first nozzle 421 is horizontally arranged and can spray water onto the side wall inside the tank body 1, and cooperate with the rotating brush block 331 to brush the side wall to enhance the cleaning effect. The longitudinally arranged second nozzle 422 sprays in a vertical direction to help clean the brush component 3 below and the bottom of the tank body 1. The sewage after cleaning the inside of the tank body 1 is discharged from the sewage outlet 14 at the bottom of the tank body 1.

[0039] It should be noted that the rotating rod 21 can rotate in one direction under the drive of the rotating drive member 2, or it can reverse after several rounds of forward rotation. The forward rotation combined with the reverse rotation helps the brushing component 3 to scrape off the residual material on the side wall, resulting in a better cleaning effect.

[0040] Please refer to Figure 1 and Figure 3 In this embodiment, the scrubbing layer is made of an elastic material and has a certain elasticity to enhance the fit with the side wall of the tank body 1, and can more effectively scrape off the dirt on the side wall to ensure the cleaning effect, while also ensuring that no damage is caused to the side wall of the tank body 1; preferably, the scrubbing layer in this embodiment is a cleaning pad made of rubber material, in addition to this, other elastic materials can also be selected.

[0041] Please refer to Figure 2 In this embodiment, the connecting frame includes a mounting block 32, and a cavity for accommodating an elastic member 321 is provided inside the mounting block 32. A connecting rod 34 is connected to the side of the scrubbing block 331 opposite to the scrubbing layer. A hole for inserting the connecting rod 34 is opened at the end of the mounting block 32. The elastic member 321 is installed in the cavity of the mounting block 32, one end of which is against the bottom surface of the cavity, and the other end is against the inserted connecting rod 34. By providing the mounting block 32, the elastic force direction of the elastic member 321 is limited to the horizontal direction, ensuring that the scrubbing layer on the scrubbing block 331 is tightly fitted to the side wall of the tank body 1.

[0042] Specifically, two mounting blocks 32 are provided, and correspondingly, two connecting rods 34 are also provided, and each connecting rod 34 is connected to one mounting block 32 .

[0043] Please refer to Figure 2 In this embodiment, a limiting ring 341 is provided at one end of the connecting rod 34 extending into the interior of the mounting block 32. The limiting ring 341 abuts against the side surface inside the mounting block 32 to limit the connecting rod 34 so that it can only move in the horizontal direction.

[0044] Please refer to Figure 1 and Figure 2 In this embodiment, the connecting frame also includes a connecting block 31, one side of the connecting block 31 is connected to the rotating rod 21, and the other side is connected to the mounting block 32. The connecting block 31 is fixedly connected to the rotating rod 21 and rotates with the rotating rod 21. One end of the mounting block 32 is fixedly installed on the connecting block 31 so as to move with the connecting block 31.

[0045] Specifically, a connecting sleeve 22 is sleeved on the rotating rod 21 , and the connecting block 31 is connected to the rotating rod 21 through the connecting sleeve 22 .

[0046] Please refer to Figure 1 In this embodiment, the water spray assembly 4 includes a water supply ring 41 and a water distribution plate 42 which are arranged and connected up and down. The water supply ring 41 and the water distribution plate 42 are both provided with a hole for the rotating rod 21 to pass through. A plurality of first nozzles 421 are spaced apart on the side of the water distribution plate 42, and a plurality of second nozzles 422 are evenly distributed on the bottom of the water distribution plate 42. Specifically, the water supply ring 41 is installed on the top of the tank body 1, and its top is exposed outside the tank body 1. The water supply ring 41 is connected to the external water supply device through a pipeline. The interior of the water supply ring 41 is hollow. The water supply device sends the cleaning water into the water supply ring 41 through the pipeline. After passing through the water supply ring 41, The water enters the water diversion tray 42 below. The water diversion tray 42 is provided with a pipe inside, which can guide the water to each first nozzle 421 and the second nozzle 422. The first nozzle 421 and the second nozzle 422 spray the water. Among them, the first nozzle 421 is arranged on the side of the water diversion tray 42 and is placed horizontally. It can spray water in a horizontal direction, so that the water is sprayed onto the side wall of the tank body 1. The second nozzle 422 is arranged at the bottom of the water diversion tray 42 and is placed vertically, spraying the water downward. Through the first nozzle 421 and the second nozzle 422, the interior of the tank body 1 is sprayed in all directions, thereby improving the cleaning effect.

[0047] Please refer to Figure 1 In this embodiment, a water delivery drive device 5 is provided on the top of the tank body 1. One side of the water delivery drive device 5 is connected to the water delivery ring 41 through a pipeline, and the other side is connected to the water supply area through a pipeline. The water is pumped out of the water supply area and delivered to the water delivery ring 41 through the power provided by the water delivery drive device 5.

[0048] Please refer to Figure 1 In this embodiment, an inclined plate 111 is provided at the bottom of the liquid storage chamber 11, and the drain outlet 14 is provided at the center of the bottom of the tank body 1 and is connected to the internal liquid storage chamber 11. The higher side of the inclined plate 111 is connected to the side wall of the tank body 1, and the other side is inclined downward and connected to the edge of the orifice of the drain outlet 14. The entire inclined plate 111 is in an inverted cone shape, and the drain outlet 14 is located at the bottom center of the inverted cone shape. By providing the inclined plate 111, the internal liquid is guided to the drain outlet 14 for discharge, which can effectively avoid liquid accumulation inside the liquid storage tank, prevent contamination of newly stored liquid materials, and improve the reliability of the liquid storage tank.

[0049] Please refer to Figure 1 In this embodiment, a plurality of support ribs 112 are provided between the inclined plate 111 and the bottom of the tank body 1. The support ribs 112 are arranged in the vertical direction to provide support for the inclined plate 111 and prevent the inclined plate 111 from collapsing due to excessive force when materials are stored inside the tank body 1.

[0050] Please refer to Figure 1 In this embodiment, an exhaust valve 15 connected to the liquid storage chamber 11 is provided on the top of the tank body 1. The exhaust valve 15 can be used to help discharge the gas inside the tank body 1 and relieve the pressure of the tank body 1, which helps to ensure the normal use of the liquid storage tank. Example 2

[0051] like Figure 4 As shown, a non-limiting embodiment of the present invention, the structure and principle of this embodiment are basically the same as those of embodiment 1, the difference being that two groups of brush assemblies 3 are provided in this embodiment, and the two groups of brush assemblies 3 are symmetrically connected to the rotating rod 21; in addition to the above-mentioned setting method, the number of brush assemblies 3 can also be increased according to actual needs.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0053] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0055] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0056] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A liquid storage tank with good cleaning effect, comprising a tank body, a liquid storage cavity provided inside the tank body, and a feed port and a discharge port connected to the liquid storage cavity provided on the surface of the tank body, characterized in that: A sewage outlet is provided at the bottom of the tank body, a rotating drive member is provided at the top of the tank body, a rotating rod connected to the rotating drive member is provided in the liquid storage chamber, and the rotating rod is connected to at least one group of brush assemblies, the brush assembly includes a connecting frame and a brush block, an elastic member is provided between the connecting frame and the brush block, both ends of the elastic member are against the connecting frame and the brush block, a brush layer is provided on a side of the brush block close to the side wall of the tank body, and the brush layer is in contact with the side wall of the tank body, a water spray assembly is provided on the top of the liquid storage chamber, and the water spray assembly includes a plurality of horizontally arranged first nozzles and a plurality of vertically arranged second nozzles.

2. The liquid storage tank with good cleaning effect according to claim 1, characterized in that: The scrubbing layer is a soft structure with elasticity.

3. The liquid storage tank with good cleaning effect according to claim 1, characterized in that: The connecting frame includes a mounting block, a cavity for accommodating the elastic member is provided inside the mounting block, a connecting rod is connected to the side of the brushing block opposite to the brushing layer, a hole for inserting the connecting rod is opened at the end of the mounting block, one end of the connecting rod is inserted into the mounting block and abuts against the elastic member in the mounting block.

4. The liquid storage tank with good cleaning effect according to claim 3, characterized in that: One end of the connecting rod extending into the interior of the mounting block is provided with a limiting ring.

5. The liquid storage tank with good cleaning effect according to claim 3, characterized in that: The connecting frame further comprises a connecting block, one side of which is connected to the rotating rod, and the other side of which is connected to the mounting block.

6. The liquid storage tank with good cleaning effect according to claim 1, characterized in that: The water spray assembly includes a water supply ring and a water distribution plate which are arranged and connected up and down. The water supply ring and the water distribution plate are both provided with holes for the rotating rod to pass through. A plurality of the first nozzles are arranged at intervals on the side of the water distribution plate, and a plurality of the second nozzles are distributed on the bottom of the water distribution plate.

7. The liquid storage tank with good cleaning effect according to claim 6, characterized in that: A water delivery drive device is provided on the top of the tank body, and the water delivery drive device is connected to the water delivery ring through a pipeline.

8. The liquid storage tank with good cleaning effect according to claim 1, characterized in that: The bottom of the liquid storage cavity is provided with an inclined plate, and the sewage outlet is provided at the center of the bottom of the tank body. The higher side of the inclined plate is connected to the side wall of the tank body, and the lower side is connected to the edge of the orifice of the sewage outlet.

9. The liquid storage tank with good cleaning effect according to claim 8, characterized in that: A plurality of supporting ribs are provided between the inclined plate and the bottom of the tank body.

10. The liquid storage tank with good cleaning effect according to claim 1, characterized in that: The top of the tank body is provided with an exhaust valve communicated with the liquid storage cavity.

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