Heat exchanger cleaning device

Abstract

The invention relates to the technical field of heat exchanger cleaning devices, in particular to a heat exchanger cleaning device. A heat exchanger cleaning device comprises a heat exchange shell and a heat exchange pipe, the heat exchange pipe is arranged in the heat exchange shell, a cleaning structure is arranged in the heat exchange shell, and the cleaning structure is used for cleaning scaling substances on the inner wall of the heat exchange shell and the pipe wall of the heat exchange pipe. The heat exchanger has the following beneficial effects that the cleaning structure cleans scales on the inner wall of the heat exchange shell and the pipe wall of the heat exchange pipe, the scales in the heat exchanger are reduced, the heat exchange efficiency is improved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchanger cleaning devices, and in particular to a heat exchanger cleaning device. Background Art

[0002] As an important heat transfer equipment, heat exchangers play a key role in industrial production, energy conversion and environmental protection. By efficiently transferring heat, heat exchangers can not only improve energy utilization efficiency, but also reduce energy consumption and reduce environmental pollution.

[0003] With the advancement of technology, the design of heat exchangers has been continuously optimized, and a variety of structural forms and material options have emerged to meet the needs of different working conditions.

[0004] At present, in order to achieve efficient heat exchange, common methods include using various types of heat exchangers such as straight tube, plate, and shell and tube types. Among them, the coil heat exchanger embeds a group of small-diameter pipes into a large-diameter pipe to form an inner and outer double-layer channel to increase the contact area and heat transfer efficiency.

[0005] However, during long-term use, scale is easily accumulated inside the heat exchanger due to various reasons, which not only reduces the heat exchange efficiency but also may cause safety hazards. Summary of the invention

[0006] In order to reduce scaling inside a heat exchanger, improve heat exchange efficiency, and reduce potential safety hazards, the present application provides a heat exchanger cleaning device.

[0007] A heat exchanger cleaning device provided in the present application adopts the following technical solution: it includes a heat exchange shell and a heat exchange tube, the heat exchange tube is arranged in the heat exchange shell, and a cleaning structure is arranged in the heat exchange shell, and the cleaning structure is used to clean the scale on the inner wall of the heat exchange shell and the wall of the heat exchange tube.

[0008] By adopting the above technical solution, the cleaning structure cleans the scaling on the inner wall of the heat exchange shell and the wall of the heat exchange tube, thereby reducing scaling inside the heat exchange shell, improving heat exchange efficiency, and reducing the occurrence of safety hazards.

[0009] Preferably, the cleaning structure includes a cleaning ring, cleaning bristles and a cleaning nozzle, the cleaning ring is sleeved on the heat exchange tube, the cleaning bristles are arranged on the outer ring wall of the cleaning ring, the end of the cleaning bristles away from the cleaning ring is used to abut against the inner wall of the heat exchange shell, and the cleaning nozzle is arranged on the cleaning ring, and the cleaning nozzle is directed toward the heat exchange tube and sprays cleaning liquid.

[0010] By adopting the above technical solution, since the cleaning bristles are in contact with the inner wall of the heat exchange shell, the cleaning bristles will continuously rub against the inner wall of the heat exchange shell, thereby removing scale; at the same time, the cleaning nozzle will spray cleaning liquid to further dissolve and rinse away stubborn scale. The entire process does not require disassembly of the heat exchange shell, which greatly improves work efficiency.

[0011] Preferably, a driving member is provided in the heat exchange shell, the driving member is connected to the cleaning ring, and the driving member is used to drive the cleaning ring to be axially positionable and reciprocatingly slidably connected to the heat exchange shell.

[0012] By adopting the above technical solution, the driving member pushes the cleaning ring to reciprocate along the axial direction of the heat exchange shell. During the reciprocating movement of the cleaning ring and the cleaning bristles contacting the inner wall of the heat exchange shell, the cleaning bristles continuously rub against the inner wall of the heat exchange shell, thereby removing scale.

[0013] Preferably, a nozzle driving component is provided on the cleaning ring, and the nozzle driving component is used to drive the cleaning nozzle to rotate and connect to the cleaning ring, and the rotation axis of the cleaning nozzle is perpendicular to the radial direction of the cleaning ring.

[0014] By adopting the above technical solution, the scaling on the wall of the heat exchange tube and the inner wall of the heat exchange shell can be dissolved and washed in the process of the nozzle driving member driving the cleaning nozzle to rotate.

[0015] Preferably, an oscillating structure is provided on the outer wall of the heat exchange shell, and the oscillating structure is used to give vibration to the heat exchange shell.

[0016] By adopting the above technical solution, the oscillating structure can effectively vibrate the scaling adhered to the inner wall of the heat exchange shell, help the scaling fall off, improve the cleaning efficiency, and improve the cleaning effect.

[0017] Preferably, the oscillation structure includes an oscillation box, an oscillation motor and an oscillation wheel. The oscillation box is arranged on one side outer wall of the filtration and purification box, the oscillation motor and the oscillation wheel are arranged in the oscillation box, the oscillation wheel and the output shaft of the oscillation motor are eccentrically connected, and the oscillation motor drives the oscillation wheel to swing back and forth and hit the inner wall of the oscillation box.

[0018] By adopting the above technical solution, the oscillation motor drives the oscillation wheel to swing back and forth to hit the inner wall of the oscillation box. In the process of hitting the oscillation box, the oscillation box is given vibration, and the vibration is transmitted from the oscillation box to the heat exchange shell, which can effectively vibrate the scale adhered to the inner wall of the heat exchange shell, help the scale fall off, improve the cleaning efficiency, and improve the cleaning effect.

[0019] Preferably, a dovetail adjustment block is provided at one end of the output shaft of the oscillation motor, and a dovetail adjustment groove is provided on the end surface of the oscillation wheel close to the oscillation motor, the length direction of the dovetail adjustment groove is opened along the radial direction of the oscillation wheel, and the depth direction of the dovetail adjustment groove is opened along the axial direction of the oscillation wheel, and a plurality of positioning holes are opened on the oscillation wheel, and the positioning holes penetrate the bottom of the dovetail adjustment groove along the axial direction of the oscillation wheel, and a plurality of the positioning holes are opened on the dovetail adjustment groove at equal distances along the radial direction of the oscillation wheel, and the dovetail adjustment block and the oscillation wheel are fixed by positioning bolts, and the positioning bolt passes through one of the positioning holes and is threadedly connected to the dovetail adjustment block.

[0020] By adopting the above technical solution, such a design can change the center of gravity position of the oscillation wheel by adjusting the position of the positioning hole, thereby adjusting the vibration frequency and amplitude.

[0021] Preferably, the oscillation structure is provided in a plurality of groups, and the plurality of groups of the oscillation structure are sequentially and alternately arranged on both sides of the heat exchange shell.

[0022] By adopting the above technical solution, multiple groups of oscillation structures are alternately arranged on both sides of the heat exchange shell, which can more effectively vibrate the scale adhered to the inner wall of the heat exchange shell, further help the scale fall off, further improve the cleaning efficiency, and further improve the cleaning effect.

[0023] Preferably, a filter purification box is provided on one side of the heat exchange shell, and a cleaning liquid supply box is provided in the heat exchange shell, and the cleaning liquid supply box is used to supply cleaning liquid to the cleaning nozzle, and a circulation pipe and a reflux pipe are connected to the filter purification box, and the end of the circulation pipe away from the filter purification box is connected to the heat exchange shell, and the reflux pipe is connected to the bottom of the box wall on one side of the filter purification box, and the end of the reflux pipe away from the filter purification box is connected to the cleaning liquid supply tank, and the filter purification box is used to filter impurities in the cleaning liquid, and a reflux pump is provided on the filter purification box, and the reflux pump is used to pump the cleaning liquid after the impurities in the filter purification box are filtered out into the cleaning liquid supply tank.

[0024] By adopting the above technical solution, the filtering and purification box filters and purifies the cleaning liquid, removes impurities in the cleaning liquid, and improves the utilization rate of the cleaning liquid.

[0025] Preferably, the filtering and purification box includes a filtering and purification box body and a filtering and purification box cover, the filtering and purification box body is arranged with an open top, the filtering and purification box cover is used to seal the top opening of the filtering and purification box body, a limiting fixing piece is arranged on one side wall of the filtering and purification box body, a limiting hole for embedding the limiting fixing piece is opened on the filtering and purification box cover, and the side of the filtering and purification box body away from the limiting fixing piece is rotatably connected to the filtering and purification box cover.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The cleaning structure cleans the scale on the inner wall of the heat exchange shell and the wall of the heat exchange tube, reducing the scale inside the heat exchange shell, improving the heat exchange efficiency and reducing the occurrence of safety hazards; 2. The driving member pushes the cleaning ring to reciprocate along the axial direction of the heat exchange shell. During the reciprocating movement of the cleaning ring and the cleaning bristles against the inner wall of the heat exchange shell, the cleaning bristles and the inner wall of the heat exchange shell are constantly rubbed, thereby removing the scale. At the same time, the cleaning nozzle will spray cleaning liquid to further dissolve and wash away the stubborn scale. The whole process does not require the removal of the heat exchange shell, which greatly improves the work efficiency. 3. When the nozzle driving part drives the cleaning nozzle to rotate, the scale on the wall of the heat exchange tube and the inner wall of the heat exchange shell can be dissolved and washed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of this application; Figure 2 It is a cross-sectional schematic diagram of the overall structure of the present application; Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A; Figure 4 It is a partial structural diagram of this application; Figure 5 is a cross-sectional schematic diagram of a partial structure D of the present application; Figure 6 yes Figure 5 A partial enlarged schematic diagram of part B.

[0028] Explanation of reference numerals: 110, heat exchange shell; 111, heat exchange tube; 120, cleaning structure; 121, cleaning ring; 122, cleaning nozzle; 123, cleaning bristles; 124, nozzle driving member; 130, driving member; 131, driving screw rod; 132, driving motor; 140, oscillation structure; 141, oscillation box; 142, oscillation motor; 143, oscillation wheel; 144, dovetail adjustment block; 145, dovetail adjustment groove ; 146, positioning hole; 147, positioning bolt; 150, filter purification box; 1501, filter purification box body; 1502, filter purification box cover; 151, circulation pipe; 152, return pipe; 153, filter screen; 154, mounting plate; 155, fixing bolt; 160, limit fixing piece; 161, limit fixing block; 162, return spring; 163, limit fixing groove; 164, limit hole; 170, cleaning liquid supply box. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] The present application discloses a heat exchanger cleaning device, which is used to reduce scaling inside the heat exchanger, improve heat exchange efficiency, and reduce the occurrence of potential safety hazards.

[0031] refer to Figure 1-Figure 6 A heat exchanger cleaning device includes a heat exchange shell 110 and a heat exchange tube 111. The heat exchange tube 111 is arranged in the heat exchange shell 110. A cleaning structure 120 is arranged in the heat exchange shell 110. The cleaning structure 120 is used to clean the scaling on the inner wall of the heat exchange shell 110 and the wall of the heat exchange tube 111. The cleaning structure 120 cleans the scaling on the inner wall of the heat exchange shell 110 and the wall of the heat exchange tube 111, thereby reducing the scaling inside the heat exchanger, improving the heat exchange efficiency, and reducing the occurrence of safety hazards.

[0032] Specifically, the cleaning structure 120 includes a cleaning ring 121, cleaning bristles 123 and a cleaning nozzle 122. The cleaning ring 121 is sleeved on the heat exchange tube 111. The cleaning bristles 123 are arranged on the outer ring wall of the cleaning ring 121. The end of the cleaning bristles 123 away from the cleaning ring 121 is used to abut against the inner wall of the heat exchange shell 110. The cleaning nozzle 122 is arranged on the cleaning ring 121. The cleaning nozzle 122 faces the heat exchange tube 111 and sprays cleaning liquid. 0 is provided with a driving member 130, the driving member 130 is connected to the cleaning ring 121, and the driving member 130 is used to drive the cleaning ring 121 to slide back and forth along the axial direction of the heat exchange shell 110 so as to be positioned and connected to the heat exchange shell 110. In this embodiment, the driving member 130 is a driving screw 131 and a driving motor 132. The driving motor 132 is arranged at the top of the heat exchange shell 110, and the driving screw 131 is arranged along the vertical direction and penetrates the cleaning ring 121.

[0033] The cleaning ring 121 is pushed and driven by the driving member 130 to reciprocate along the axial direction of the heat exchange shell 110. Since the cleaning bristles 123 are in contact with the inner wall of the heat exchange shell 110, the cleaning bristles 123 will continuously rub against the inner wall of the heat exchange shell 110, thereby removing scale. During the reciprocating motion of the cleaning ring 121 and the contact of the cleaning bristles 123 against the inner wall of the heat exchange shell 110, the cleaning bristles 123 will continuously rub against the inner wall of the heat exchange shell 110, thereby removing scale. At the same time, the cleaning nozzle 122 will spray cleaning liquid to further dissolve and rinse away stubborn scale. The whole process does not require disassembly of the heat exchanger, which greatly improves work efficiency.

[0034] Furthermore, a nozzle driving component 124 is provided on the cleaning ring 121. The nozzle driving component 124 is used to drive the cleaning nozzle 122 to rotate and be connected to the cleaning ring 121. The rotation axis of the cleaning nozzle 122 is perpendicular to the radial direction of the cleaning ring 121. The nozzle driving component 124 can be a small motor, which drives the nozzle to rotate through gear transmission. In the process of the nozzle driving component 124 driving the cleaning nozzle 122 to rotate, the scale on the tube wall of the heat exchange tube 111 and the inner wall of the heat exchange shell 110 can be dissolved and flushed.

[0035] In order to effectively vibrate the scale adhered to the inner wall of the heat exchange shell 110, help the scale to fall off, improve the cleaning efficiency, and improve the cleaning effect, an oscillation structure 140 is provided on the outer wall of the heat exchange shell 110. The oscillation structure 140 is used to give the heat exchange shell 110 vibration. In this embodiment, a plurality of groups of oscillation structures 140 are provided, and the plurality of groups of oscillation structures 140 are arranged alternately on both sides of the heat exchange shell 110 in sequence.

[0036] Specifically, the oscillation structure 140 includes an oscillation box 141, an oscillation motor 142 and an oscillation wheel 143. The oscillation box 141 is arranged on one side outer wall of the filtration and purification box 150, and the oscillation motor 142 and the oscillation wheel 143 are arranged in the oscillation box 141. The output shafts of the oscillation wheel 143 and the oscillation motor 142 are eccentrically connected. The oscillation motor 142 drives the oscillation wheel 143 to swing back and forth and hit the inner wall of the oscillation box 141. The oscillation motor 142 drives the oscillation wheel 143 to swing back and forth and hit the inner wall of the oscillation box 141. In the process of hitting the oscillation box 141, the oscillation box 141 is given an oscillation. The vibration is transmitted from the oscillation box 141 to the heat exchange shell 110, which can effectively vibrate the scale adhered to the inner wall of the heat exchange shell 110, help the scale fall off, improve the cleaning efficiency, and improve the cleaning effect.

[0037] A dovetail adjustment block 144 is provided at one end of the output shaft of the oscillation motor 142, and a dovetail adjustment groove 145 is provided on the end surface of the oscillation wheel 143 close to the oscillation motor 142. The length direction of the dovetail adjustment groove 145 is opened along the radial direction of the oscillation wheel 143, and the depth direction of the dovetail adjustment groove 145 is opened along the axial direction of the oscillation wheel 143. A plurality of positioning holes 146 are opened on the oscillation wheel 143, and the positioning holes 146 penetrate the bottom of the dovetail adjustment groove 145 along the axial direction of the oscillation wheel 143. A plurality of positioning holes 146 are opened on the dovetail adjustment groove 145 at equal intervals along the radial direction of the oscillation wheel 143. The dovetail adjustment block 144 and the oscillation wheel 143 are fixed to each other by positioning bolts 147, and the positioning bolts 147 pass through one of the positioning holes 146 and are threadedly connected to the dovetail adjustment block 144. Such a design can change the center of gravity position of the oscillation wheel 143 by adjusting the position of the positioning holes 146, thereby adjusting the vibration frequency and amplitude.

[0038] In addition, a filter purification box 150 is provided on one side of the heat exchange shell, and a cleaning liquid supply box 170 is provided in the heat exchange shell. The cleaning liquid supply box 170 is used to supply cleaning liquid to the cleaning nozzle 122. The filter purification box 150 is connected with a circulation pipe 151 and a return pipe 152. The end of the circulation pipe 151 away from the filter purification box 150 is connected to the heat exchange shell, and the return pipe 152 is connected to the bottom of the box wall on one side of the filter purification box 150. The end of the return pipe 152 away from the filter purification box 150 is connected to the cleaning liquid supply box 170. The filter purification box 150 is used to filter impurities in the cleaning liquid. The filter purification box 150 is provided with a reflux pump. The reflux pump is used to pump the cleaning liquid after the impurities are filtered out in the filter purification box 150 into the cleaning liquid supply tank 170.

[0039] A secondary filter 153 is provided in the filtration and purification box 150. The secondary filter 153 is used to filter impurities in the cleaning liquid entering the filtration and purification box 150 to ensure the quality of the cleaning liquid. In this embodiment, the secondary filter 153 is detachable, and mounting plates 154 are provided on the four sides of the secondary filter 153. The mounting plates 154 are vertically arranged on the secondary filter 153. Fixing bolts 155 are passed through the mounting plates 154 and then passed through the inner wall of the filtration and purification box 150.

[0040] In order to facilitate the disassembly and assembly of the secondary filter 153, the filtration and purification box 150 can be opened and closed. The filtration and purification box 150 includes a filtration and purification box body 1501 and a filtration and purification box cover 1502. The filtration and purification box body 1501 is open at the top, and the filtration and purification box cover 1502 is used to seal the top opening of the filtration and purification box body 1501. A limiting fixing part 160 is arranged on one side of the box wall of the filtration and purification box body 1501, and a limiting hole 164 is opened on the filtration and purification box cover 1502 for embedding the limiting fixing part 160. The side of the filtration and purification box body 1501 away from the limiting fixing part 160 is rotatably connected to the filtration and purification box cover 1502.

[0041] Specifically, the limiting fixing member 160 includes a limiting fixing block 161 and a return spring 162. A limiting fixing groove 163 for partially embedding the limiting fixing member 160 is opened on one side wall of the filtration and purification box 150. One end of the return spring 162 is connected to the bottom of the limiting fixing groove 163, and the other end of the return spring 162 is connected to the limiting fixing block 161. The limiting fixing block 161 is partially embedded in the limiting fixing groove 163, and the limiting fixing block 161 is used to be embedded in the limiting hole 164. In this embodiment, two groups of limiting fixing members 160 are provided, and correspondingly, two limiting holes 164 are opened on the filtration and purification box cover 1502. The filtration and purification box cover 1502 is L-shaped, and the limiting hole 164 is opened at the short side of the filtration and purification box cover 1502.

[0042] The implementation principle of a heat exchanger cleaning device in an embodiment of the present application is as follows: a cleaning structure 120 is provided in the heat exchange shell 110, and the cleaning structure 120 is used to clean the scaling on the inner wall of the heat exchange shell 110 and the wall of the heat exchange tube 111. The cleaning structure 120 cleans the scaling on the inner wall of the heat exchange shell 110 and the wall of the heat exchange tube 111, thereby reducing the scaling inside the heat exchanger, improving the heat exchange efficiency, and reducing the occurrence of safety hazards.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heat exchanger cleaning device, comprising a heat exchange shell (110) and a heat exchange tube (111), wherein the heat exchange tube (111) is arranged in the heat exchange shell (110), characterized in that: A cleaning structure (120) is provided in the heat exchange shell (110), and the cleaning structure (120) is used to clean scale deposits on the inner wall of the heat exchange shell (110) and the wall of the heat exchange tube (111).

2. A heat exchanger cleaning device according to claim 1, characterized in that: The cleaning structure (120) comprises a cleaning ring (121), cleaning bristles (123) and a cleaning nozzle (122); the cleaning ring (121) is sleeved on the heat exchange tube (111); the cleaning bristles (123) are arranged on the outer ring wall of the cleaning ring (121); one end of the cleaning bristles (123) away from the cleaning ring (121) is used to abut against the inner wall of the heat exchange shell (110); the cleaning nozzle (122) is arranged on the cleaning ring (121); the cleaning nozzle (122) faces the heat exchange tube (111) and sprays cleaning liquid.

3. A heat exchanger cleaning device according to claim 2, characterized in that: A driving member (130) is arranged in the heat exchange shell (110), the driving member (130) being connected to the cleaning ring (121), and the driving member (130) being used to drive the cleaning ring (121) to be connected to the heat exchange shell (110) in a reciprocating sliding manner along the axial direction of the heat exchange shell (110) so as to be positionable.

4. A heat exchanger cleaning device according to claim 2, characterized in that: A nozzle driving component (124) is provided on the cleaning ring (121), and the nozzle driving component (124) is used to drive the cleaning nozzle (122) to rotate and connect to the cleaning ring (121), and the rotation axis of the cleaning nozzle (122) is perpendicular to the radial direction of the cleaning ring (121).

5. A heat exchanger cleaning device according to claim 1, characterized in that: An oscillating structure (140) is provided on the outer wall of the heat exchange shell (110), and the oscillating structure (140) is used to impart vibration to the heat exchange shell (110).

6. A heat exchanger cleaning device according to claim 5, characterized in that: The oscillation structure (140) comprises an oscillation box (141), an oscillation motor (142) and an oscillation wheel (143); the oscillation box (141) is arranged on an outer wall of one side of the heat exchange shell (110); the oscillation motor (142) and the oscillation wheel (143) are arranged in the oscillation box (141); the oscillation wheel (143) and the output shaft of the oscillation motor (142) are eccentrically connected; the oscillation motor (142) drives the oscillation wheel (143) to oscillate back and forth to strike the inner wall of the oscillation box (141).

7. A heat exchanger cleaning device according to claim 6, characterized in that: A dovetail adjustment block (144) is provided at one end of the output shaft of the oscillation motor (142); a dovetail adjustment groove (145) is provided on an end surface of the oscillation wheel (143) close to the oscillation motor (142); the length direction of the dovetail adjustment groove (145) is provided along the radial direction of the oscillation wheel (143); the depth direction of the dovetail adjustment groove (145) is provided along the axial direction of the oscillation wheel (143); a plurality of positioning holes (146) are provided on the oscillation wheel (143); A positioning hole (146) penetrates the bottom of the dovetail adjustment groove (145) axially along the oscillation wheel (143); a plurality of positioning holes (146) are arranged on the dovetail adjustment groove (145) at equal intervals radially along the oscillation wheel (143); the dovetail adjustment block (144) and the oscillation wheel (143) are fixed to each other via a positioning bolt (147); the positioning bolt (147) passes through one of the positioning holes (146) and is threadedly connected to the dovetail adjustment block (144).

8. A heat exchanger cleaning device according to claim 5, characterized in that: The oscillating structures (140) are provided in multiple groups, and the multiple groups of oscillating structures (140) are sequentially and alternately arranged on both sides of the heat exchange shell (110).

9. A heat exchanger cleaning device according to claim 2, characterized in that: A filter purification box (150) is disposed on one side of the heat exchange shell (110), and a cleaning liquid supply box (170) is disposed inside the heat exchange shell (110). The cleaning liquid supply box (170) is used to supply cleaning liquid to the cleaning nozzle (122). A circulation pipe (151) and a return pipe (152) are connected to the filter purification box (150). One end of the circulation pipe (151) away from the filter purification box (150) is connected to the inside of the heat exchange shell (110). The reflux pipe (152) is connected to the bottom of a box wall on one side of the filtering and purification box (150), and one end of the reflux pipe (152) away from the filtering and purification box (150) is connected to the cleaning liquid supply box (170). The filtering and purification box (150) is used to filter impurities in the cleaning liquid. The filtering and purification box (150) is provided with a reflux pump, and the reflux pump is used to pump the cleaning liquid after the impurities are filtered out in the filtering and purification box (150) into the cleaning liquid supply box (170).

10. A heat exchanger cleaning device according to claim 9, characterized in that: The filtering and purification box (150) comprises a filtering and purification box body (1501) and a filtering and purification box cover (1502); the filtering and purification box body (1501) is open at the top; the filtering and purification box cover (1502) is used to seal the open top of the filtering and purification box body (1501); a limiting fixture (160) is provided on one side of the box wall of the filtering and purification box body (1501); a limiting hole (164) is provided on the filtering and purification box cover (1502) for embedding the limiting fixture (160); and a side of the filtering and purification box body (1501) away from the limiting fixture (160) is rotatably connected to the filtering and purification box cover (1502).

Images