Auxiliary accessory for sewage pump and use method

Abstract

The invention relates to the technical field of water pumps, and particularly discloses an auxiliary accessory for a sewage pump and a using method.The auxiliary accessory comprises a bottom plate, a pump shell is fixedly connected to the upper surface of the bottom plate, a filter screen is fixedly connected to the upper surface of the pump shell, a water passing cavity is formed in the upper surface of the filter screen, and a pump body is arranged at the top of the water passing cavity; a first annular groove and a second annular groove are formed in the top of the pump shell, a first outer net assembly is arranged on the first annular groove, a second outer net assembly is arranged on the second annular groove, and a third annular groove is formed in the side wall of the water passing cavity. When large garbage exists, the large garbage can be blocked by the first outer net assembly and the second outer net assembly, it is guaranteed that the large garbage does not make contact with the filter net, normal operation of the machine is effectively protected, the first filter net assembly and the second filter net assembly can be effectively fixed, and work of the machine is more stable.

Description

Technical Field

[0001] The invention relates to the technical field of water pumps, and in particular to an auxiliary accessory for a sewage pump and a use method thereof. Background Art

[0002] The sewage pump is a type of centrifugal impurity pump, which has many forms: such as submersible and dry types. The most commonly used submersible type is the QW submersible sewage pump. The most common dry sewage pumps are the W-type horizontal sewage pump and the WL-type vertical sewage pump, which are mainly used to transport urban sewage, feces or fibers contained in liquids. In the prior art, according to the patent with application number 202123453459.1, a filter is provided at the inlet of the water pump, and a number of through holes are opened on the filter. A pump casing cover and a pump casing base are provided at the bottom of the filter. A cleaning device is provided in the pump casing base, and the cleaning device can clean the filter inside the filter. However, if faced with large garbage, the outside of the filter may still be blocked, and the cleaning device inside the filter cannot clean up such large garbage, such as clothes, plastic bags, cloth bags, etc., which can block most of the through holes, causing the machine to fail to operate or even burn. Summary of the invention

[0003] The object of the present invention is to provide an auxiliary accessory for a sewage pump to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary accessory for a sewage pump, comprising: a base plate, a pump casing is fixedly connected to the upper surface of the base plate, a filter screen is fixedly connected to the upper surface of the pump casing, a water passage cavity is arranged on the upper surface of the filter screen, a pump body is arranged on the top of the water passage cavity, a first annular groove and a second annular groove are provided on the top of the pump casing, a first outer net component is provided on the first annular groove, a second outer net component is provided on the second annular groove, and a third annular groove is provided on the side wall of the water passage cavity.

[0005] Preferably, the first outer net component includes a first center ring, a first cross bar, a first arc-shaped rod, a first reinforcement rod, a first mounting ring and a first support column, the first center ring is sleeved in the third annular groove and rotatably connected thereto, the first mounting ring extends into the first annular groove and rotatably connected thereto, a plurality of the first support columns are fixedly connected to the upper surface of the first mounting ring, the first reinforcement rod is arranged in the middle of a plurality of first support columns and fixedly connected to a plurality of first support columns, the first arc-shaped rod is fixedly connected to the tops of a plurality of first support columns, the first cross bar is fixedly connected between the first arc-shaped rod and the first center ring, a first through hole is provided in the center of the first cross bar at both ends of the first arc-shaped rod, and a limiter is provided on the upper surface of the first mounting ring.

[0006] Preferably, the second outer net component includes a second center ring, a second cross bar, a second arc-shaped rod, a second reinforcement rod, a second mounting ring and a second support column, the second center ring is sleeved in the third annular groove and rotatably connected thereto, the second mounting ring extends into the second annular groove and rotatably connected thereto, a plurality of second support columns are fixedly connected to the upper surface of the second mounting ring, the second reinforcement rod is arranged in the middle of the plurality of second support columns and fixedly connected to the plurality of second support columns, the second arc-shaped rod is fixedly connected to the tops of the plurality of second support columns, the second cross bar is fixedly connected between the second arc-shaped rod and the second center ring, and second through holes are provided in the centers of the second cross bars at both ends of the second arc-shaped rod.

[0007] Preferably, a plurality of balls are embedded in the bottom of the first mounting ring and the bottom of the second mounting ring.

[0008] Preferably, the limiter includes a second fixed block, a fixed column and a connecting rod, the second fixed block is fixedly connected to the upper surface of the first mounting ring, one end of the fixed column extends into the second fixed block and is slidably connected thereto, the connecting rod extends into the fixed block and is threadedly connected to the fixed block, one end of the connecting rod extends into the fixed column and is rotatably connected to the fixed column, and one end of the fixed column is provided with a concave surface, which is adapted to the second support column.

[0009] Preferably, the screw is divided into two parts: a screw and a nut. The screw passes through the first through hole and the second through hole and is threadedly connected to the second through hole. The nut is fixed on the top of the screw.

[0010] Preferably, a vertical plate is fixedly connected to the upper surface of the nut, and an annular curved surface is provided on the top of the screw.

[0011] Preferably, a notch is formed on the side wall of the first annular groove, and a second fixing component is disposed on one side of the notch.

[0012] Preferably, the second fixing assembly includes a first fixing block, a telescopic rod, a handle and a telescopic block, the first fixing block being fixedly connected to the side wall of the first annular groove, one end of the telescopic block extending into the first fixing block, the other end of the telescopic block extending into the notch and being slidably connected thereto, one end of the telescopic rod extending into the telescopic block and being threadedly connected thereto, the telescopic rod being rotatably connected to the first fixing block, and the handle being fixedly connected to the other end of the telescopic rod.

[0013] A method for using an auxiliary accessory for a sewage pump comprises the following steps:

[0014] S1. First, the first outer net component and the second outer net component can both rotate around the filter screen. If you want to completely wrap the filter screen, you need to rotate one of them so that both of them can completely wrap the filter screen;

[0015] S2. Secondly, the device is fixed with a fixing member. First, the first cross bars at both ends of the two first arc-shaped rods and the second cross bars at both ends of the two second arc-shaped rods are fixed together through the first through hole and the second through hole using screws. At this time, although the filter screen is wrapped, it can still be rotated and is unstable during use;

[0016] S3. Then, the fixing column on the stopper can be used to clamp the corresponding second supporting column into the concave surface;

[0017] S4. Finally, use the second fixing member to rotate the handle, which will drive the telescopic rod to rotate. The telescopic block will contact the first mounting ring through the notch and hinder its movement.

[0018] S5. When the outside of the filter needs to be cleaned, the stopper, the screw and the second fixing assembly can be operated in reverse, so that the first outer mesh assembly and the second outer mesh assembly can rotate freely, and then the second outer mesh assembly is rotated into the first outer mesh assembly;

[0019] S6. Finally, the first outer net assembly and the second outer net assembly are rotated while cleaning the filter.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting the first outer net component and the second outer net component and related structures, when there is large garbage, it will be effectively blocked by the first outer net component and the second outer net component, ensuring that the large garbage will not contact the filter, effectively protecting the normal operation of the machine.

[0022] 2. By providing a limiter, screws, a second fixing assembly and related structures, the first filter assembly and the second filter assembly can be effectively fixed, making the operation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the pump housing, filter screen and water passage chamber of the present invention;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the first filter assembly of the present invention;

[0026] Figure 4 is a schematic diagram of the three-dimensional structure of the second filter assembly of the present invention;

[0027] Figure 5 is a schematic diagram of the disassembled structure of the second fixing member of the present invention;

[0028] Figure 6It is a schematic diagram of the disassembled structure of the limiter of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the screw of the present invention.

[0030] In the figure: 1, pump body; 2, filter screen; 3, first outer network component; 4, second outer network component; 5, pump housing; 6, bottom plate; 7, first fixing component; 8, screw; 9, second annular groove; 10, first annular groove; 11, water passage chamber; 12, third annular groove; 13, second fixing component; 14, notch; 15, first center ring; 16, first cross bar; 17, first through hole; 18, first arc rod; 19, first support column; 20, first reinforcing rod; 21, first Mounting ring; 22. Ball bearing; 23. Second center ring; 24. Second through hole; 25. Second cross bar; 26. Second arc-shaped bar; 27. Second reinforcing bar; 28. Second mounting ring; 29. ​​Stopper; 30. Second support column; 31. First fixed block; 32. Telescopic block; 33. Telescopic rod; 34. Handle; 35. Connecting rod; 36. Second fixed block; 37. Fixed column; 38. Screw; 39. Nut; 40. Vertical plate; 41. Annular surface; 42. Concave surface. DETAILED DESCRIPTION

[0031] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] See also Figure 1 - Figure 2The present invention provides a technical solution: an auxiliary accessory for a sewage pump and a method of use, comprising: a bottom plate 6, a pump casing 5 is fixedly connected to the upper surface of the bottom plate 6, a cleaning device is arranged in the pump casing 5 to clean the garbage inside the filter screen and the through hole, a filter screen 2 is fixedly connected to the upper surface of the pump casing 5, the filter screen is used for filtering, a water passage cavity 11 is arranged on the upper surface of the filter screen 2, the water passage cavity 11 is used to temporarily store some components of the cleaning device, a pump body 1 is arranged on the top of the water passage cavity 11, the pump body 1 is the other structure of the entire water pump, and the top of the pump casing 5 A first annular groove 10 and a second annular groove 9 are provided. The first annular groove 10 is larger than the second annular groove 9 and the centers of the first annular groove 10 and the second annular groove 9 are the same. A first outer net component 3 is provided on the first annular groove 10 and the first outer net component 3 can rotate in the first annular groove 10. A second outer net component 4 is provided on the second annular groove 9 and the second outer net component 4 can rotate in the second annular groove 9. A third annular groove 12 is provided on the side wall of the water passage chamber 11 and the third annular groove 12 is also used to fix the first outer net component 3 and the second outer net component 4.

[0034] In actual use, the first outer net component 3 and the second outer net component 4 are rotated relative to each other so that the entire filter screen can be wrapped, and then fixed using the limiter 29, the screw 8 and the second fixing component 13.

[0035] Embodiment 2

[0036] See also Figure 3 , Figure 4On the basis of Example 1, the first outer net component 3 includes a first center ring 15, a first cross bar 16, a first arc rod 18, a first reinforcing rod 20, a first mounting ring 21 and a first support column 19. The first center ring 15 is sleeved in the third annular groove 12 and is rotatably connected thereto. The first center ring 15 can rotate around the third annular groove 12, thereby driving the entire first outer net component 3 to rotate. The first mounting ring 21 extends into the first annular groove 10 and is rotatably connected thereto. The first mounting ring 21 can also rotate around the first annular groove 10, and the rotation of the first mounting ring 21 can also drive the entire first outer net component 3 to rotate. The first center ring 15 and the first mounting ring 21 move together. A plurality of first support columns 19 are fixedly connected to the upper surface of the first mounting ring 21. The first support columns 19 are used to support the side of the entire device, and the support columns are not distributed throughout the entire first mounting ring 21, is only fixed on half of the mounting ring, the first reinforcing rod 20 is arranged in the middle of multiple first support columns 19 and is fixedly connected to multiple first support columns 19, the first reinforcing rod 20 is used to place the waste too fast and too heavy to damage the first support column 19, thus consolidating the first support column 19's blocking of large garbage, the first arc rod 18 is fixedly connected to the top of multiple first support columns 19, the first arc rod 18 is used to connect multiple first support columns 19 to ensure that the two ends of the first support column 19 can be connected together, the first cross bar 16 is fixedly connected between the first arc rod 18 and the first center ring 15, the first cross bar 16 is only arranged on half of the side surface of the first center ring 15, the center of the first cross bar 16 at both ends of the first arc rod 18 is provided with a first through hole 17, the upper surface of the first mounting ring 21 is provided with a limiter 29, the limiter 29 is used to fix the first mounting ring 21.

[0037] The second outer net component 4 includes a second center ring 23, a second cross bar 25, a second arc-shaped rod 26, a second reinforcement rod 27, a second mounting ring 28 and a second support column 30. The second outer net component 4 includes a second center ring 23, a second cross bar 25, a second arc-shaped rod 26, a second reinforcement rod 27, a second mounting ring 28 and a second support column 30. The second center ring 23 is sleeved in the third annular groove 12 and is rotatably connected thereto. The second center ring 23 can rotate around the third annular groove 12, thereby driving the entire second outer net component 4 to rotate. The second mounting ring 28 extends into the second annular groove 9 and is rotatably connected thereto. The second mounting ring 28 can also rotate around the second annular groove 9, and the rotation of the second mounting ring 28 can also drive the entire second outer net component 4 to rotate. The second center ring 23 and the second mounting ring 28 move together. A plurality of second support columns 30 are fixedly connected to the upper surface of the second mounting ring 28. The second support columns 30 are used to support the side of the entire device The second reinforcing rod 27 is arranged in the middle of the plurality of second supporting columns 30 and is fixedly connected to the plurality of second supporting columns 30. The second reinforcing rod 27 is used to prevent the second supporting columns 30 from being damaged by excessive speed or excessive mass, thereby consolidating the blocking of the second supporting columns 30 against large garbage. The second arc rod 26 is fixedly connected to the tops of the plurality of second supporting columns 30. The second arc rod 26 is used to connect the plurality of second supporting columns 30 to ensure that the two ends of the second supporting columns 30 can be connected together. The second cross bar 25 is fixedly connected between the second arc rod 26 and the second center ring 23. The second cross bar 25 is only arranged on half of the side surface of the second center ring 23. The centers of the second cross bars 25 at both ends of the second arc rod 26 are provided with second through holes 24, and threads are arranged in the second through holes 24. The bottom of the first mounting ring 21 and the bottom of the second mounting ring 28 are both embedded with a plurality of balls 22.

[0038] In actual use, either the first outer net component 3 or the second outer net component 4 can be rotated, and the first support column 19 and the second support column 30 on both sides are rotated to block the filter together. At this time, the first through hole 17 and the second through hole 24 overlap each other, and can be aligned and fixed by screws 8. When the filter needs to be washed, the second outer net component 4 can also be rotated to make the second outer net component 4 and the first outer net component 3 overlap each other, so that the exposed filter can be washed.

[0039] Embodiment 3

[0040] See also Figure 5 - Figure 7On the basis of the second embodiment, the limiter 29 includes a second fixed block 36, a fixed column 37 and a connecting rod 35. The second fixed block 36 is fixedly connected to the upper surface of the first mounting ring 21, so that the limiter 29 acts on the first outer network component 3, one end of the fixed column 37 extends into the second fixed block 36 and is slidably connected thereto, the other end of the fixed column 37 is arranged on the outside of the second fixed block 36, the connecting rod 35 extends into the fixed block and is threadedly connected to the fixed block, the rotation of the connecting rod 35 in the fixed block will drive the fixed column 37 to move, one end of the connecting rod 35 extends into the fixed column 37 and is rotatably connected to the fixed column 37, the other end of the connecting rod 35 is equipped with a handle for hand holding, one end of the fixed column 37 is provided with a concave surface 42, the concave surface 42 is adapted to the second support column 30, and the second support column 30 is stuck in the concave surface 42 until the connecting rod 35 cannot be rotated.

[0041] The screw 8 is divided into two parts, a screw 38 and a nut 39. The screw 38 passes through the first through hole 17 and the second through hole 24 and is threadedly connected to the second through hole 24. The second through hole 24 is arranged below the first through hole 17, so the screw 38 passes through the first through hole 17 above and then passes through the second through hole 24. The nut 39 is fixed to the top of the screw 38. The nut 39 is used for limiting the position. The upper surface of the nut 39 is fixedly connected with a vertical plate 40. The vertical plate 40 can be rotated by hand, so that the screw 38 can be driven to rotate without the need for tools. An annular curved surface 41 is arranged on the top of the screw 38. The annular curved surface 41 is for facilitating the insertion of the screw 38 into the threaded hole when in use.

[0042] A notch 14 is provided on the side wall of the first annular groove 10, and the inside of the notch 14 is smooth. The notch 14 runs through the side wall of the first annular groove 10. A second fixing component 13 is provided on one side of the notch 14. The second fixing component 13 is used to fix the first outer net component 3. The second fixing component 13 includes a first fixing block 31, a telescopic rod 33, a handle 34 and a telescopic block 32. The first fixing block 31 is fixedly connected to the side wall of the first annular groove 10. The first fixing block 31 blocks the notch 14. One end of the telescopic block 32 extends into the first fixing block 31 and is connected to the first outer net component 3. It is slidably connected, and the other end of the telescopic block 32 extends into the notch 14 and is slidably connected thereto. The telescopic block 32 moves back and forth in the notch 14 and the first fixed block 31. One end of the telescopic rod 33 extends into the telescopic block 32 and is threadedly connected thereto. When the telescopic rod 33 rotates, the telescopic block 32 extends and retracts. The telescopic rod 33 is rotatably connected to the first fixed block 31. The telescopic rod 33 cannot move back and forth in the first fixed block 31 and can only rotate. The handle 34 is fixedly connected to the other end of the telescopic rod 33, and the handle 34 is convenient for holding and rotating.

[0043] In actual use, an auxiliary accessory for a sewage pump is used to rotate the first outer network component 3 and the second outer network component 4 relative to each other so that the entire filter can be wrapped, and then the limiter 29, the screw 8 and the second fixing component 13 are used to fix it. When fixing, either the first outer network component 3 or the second outer network component 4 can be rotated, and the first support column 19 and the second support column 30 on both sides are rotated to block the filter together. At this time, the first through hole 17 and the second through hole 24 overlap each other, and they can be fixed by the screw 8. After the screw 8 is fixed, the limiter 29 can be used to strengthen the limitation of the screw 8, and finally the first outer network component 3 is fixed by the pump casing 5. When the filter needs to be washed, the second outer network component 4 can also be rotated so that the second outer network component 4 and the first outer network component 3 overlap, and the exposed filter can be washed.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary accessory for a sewage pump, comprising: A bottom plate (6), characterized in that: a pump housing (5) is fixedly connected to the upper surface of the bottom plate (6), a filter screen (2) is fixedly connected to the upper surface of the pump housing (5), a water passage cavity (11) is provided on the upper surface of the filter screen (2), a pump body (1) is provided on the top of the water passage cavity (11), a first annular groove (10) and a second annular groove (9) are provided on the top of the pump housing (5), a first outer network component (3) is provided on the first annular groove (10), a second outer network component (4) is provided on the second annular groove (9), and a third annular groove (12) is provided on the side wall of the water passage cavity (11).

2. The auxiliary accessory for a sewage pump according to claim 1, characterized in that: The first outer net assembly (3) comprises a first central ring (15), a first cross bar (16), a first arc-shaped bar (18), a first reinforcing bar (20), a first mounting ring (21) and a first support column (19); the first central ring (15) is sleeved in the third annular groove (12) and is rotatably connected thereto; the first mounting ring (21) extends into the first annular groove (10) and is rotatably connected thereto; a plurality of the first support columns (19) are fixedly connected to the upper surface of the first mounting ring (21); the first reinforcing bar (20) is arranged in the middle of the plurality of first support columns (19) and is fixedly connected to the plurality of first support columns (19); the first arc-shaped bar (18) is fixedly connected to the top of the plurality of first support columns (19); the first cross bar (16) is fixedly connected between the first arc-shaped bar (18) and the first central ring (15); the centers of the first cross bars (16) at both ends of the first arc-shaped bar (18) are each provided with a first through hole (17); and a limiter (29) is provided on the upper surface of the first mounting ring (21).

3. The auxiliary accessory for a sewage pump according to claim 2, characterized in that: The second outer net assembly (4) comprises a second central ring (23), a second cross bar (25), a second arc-shaped rod (26), a second reinforcing rod (27), a second mounting ring (28) and a second support column (30); the second central ring (23) is sleeved in the third annular groove (12) and is rotatably connected thereto; the second mounting ring (28) extends into the second annular groove (9) and is rotatably connected thereto; a plurality of second support columns (30) are fixedly connected to the upper surface of the second mounting ring (28); the second reinforcing rod (27) is arranged in the middle of the plurality of second support columns (30) and is fixedly connected to the plurality of second support columns (30); the second arc-shaped rod (26) is fixedly connected to the top of the plurality of second support columns (30); the second cross bar (25) is fixedly connected between the second arc-shaped rod (26) and the second central ring (23); and second through holes (24) are provided in the centers of the second cross bars (25) at both ends of the second arc-shaped rod (26).

4. The auxiliary accessory for a sewage pump according to claim 3, characterized in that: A plurality of balls (22) are embedded in the bottom of the first mounting ring (21) and the bottom of the second mounting ring (28).

5. The auxiliary accessory for a sewage pump according to claim 4, characterized in that: The limiter (29) comprises a second fixed block (36), a fixed column (37) and a connecting rod (35); the second fixed block (36) is fixedly connected to the upper surface of the first mounting ring (21); one end of the fixed column (37) extends into the second fixed block (36) and is slidably connected thereto; the connecting rod (35) extends into the fixed block and is threadedly connected to the fixed block; one end of the connecting rod (35) extends into the fixed column (37) and is rotatably connected to the fixed column (37); one end of the fixed column (37) is provided with a concave surface (42); the concave surface (42) is adapted to the second support column (30).

6. The auxiliary accessory for a sewage pump according to claim 5, characterized in that: The screw (8) is divided into two parts: a screw (38) and a nut (39). The screw (38) passes through the first through hole (17) and the second through hole (24) and is threadedly connected to the second through hole (24). The nut (39) is fixed on the top of the screw (38).

7. The auxiliary accessory for a sewage pump according to claim 6, characterized in that: The upper surface of the nut (39) is fixedly connected to a vertical plate (40), and the top of the screw (38) is provided with an annular curved surface (41).

8. The auxiliary accessory for a sewage pump according to claim 7, characterized in that: A notch (14) is provided on the side wall of the first annular groove (10), and a second fixing component (13) is arranged on one side of the notch (14).

9. The auxiliary accessory for a sewage pump according to claim 8, characterized in that: The second fixing assembly (13) comprises a first fixing block (31), a telescopic rod (33), a handle (34) and a telescopic block (32); the first fixing block (31) is fixedly connected to the side wall of the first annular groove (10); one end of the telescopic block (32) extends into the first fixing block (31); the other end of the telescopic block (32) extends into the notch (14) and is slidably connected thereto; one end of the telescopic rod (33) extends into the telescopic block (32) and is threadedly connected thereto; the telescopic rod (33) is rotatably connected to the first fixing block (31); and the handle (34) is fixedly connected to the other end of the telescopic rod (33).

10. A method for using the auxiliary accessory for a sewage pump according to any one of claims 1 to 9, characterized in that: The steps include: S1. First, the first outer net component (3) and the second outer net component (4) can both rotate around the filter screen. If the filter screen is to be completely covered, one of them needs to be rotated so that both can completely cover the filter screen; S2. Next, the device is fixed using a fixing member. First, the first cross bars (16) at both ends of the two first arc-shaped bars (18) and the second cross bars (25) at both ends of the two second arc-shaped bars (26) are fixed together through the first through hole (17) and the second through hole (24). At this time, although the filter screen is wrapped, it can still be rotated and is unstable during use; S3. Then, the fixing column (37) on the stopper (29) can be used to clamp the corresponding second supporting column (30) in the concave surface (42); S4, finally, using the second fixing member to rotate the handle (34), the handle (34) will drive the telescopic rod (33) to rotate, and after the telescopic rod (33) rotates, the telescopic block (32) contacts the first mounting ring (21) through the notch (14) and hinders its movement; S5. When the outer side of the filter needs to be cleaned, the stopper (29), the screw (8) and the second fixing assembly (13) can be operated in reverse order to allow the first outer mesh assembly (3) and the second outer mesh assembly (4) to rotate freely, and then the second outer mesh assembly (4) is rotated into the first outer mesh assembly (3); S6. Finally, the first outer net assembly (3) and the second outer net assembly (4) are rotated while cleaning the filter.

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