Material suction equipment matched with extruder

Abstract

The utility model relates to the technical field of extruders, in particular to material suction equipment matched with an extruder, which improves the energy utilization rate and reduces pollution. Comprising a feeding platform, and a feeding barrel, a storage barrel and an air supply assembly are arranged on the feeding platform; the air supply assembly comprises an air pump and a cleaning box, the top of the feeding barrel communicates with the air exhaust end of the air pump through an air exhaust pipe, a first filter screen is arranged at the bottom end, located in the feeding barrel, of the air exhaust pipe, the air exhaust end of the air pump communicates with one side of the cleaning box through a first air exhaust pipe, and the other side of the cleaning box communicates with the bottom of the storage barrel through a second air exhaust pipe. A flow equalizing structure is arranged in the material storage barrel, and the top of the material storage barrel communicates with the side wall of the material supply barrel through a material conveying pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of extruders, and in particular to a feeding device for an extruder. Background Technology

[0002] A material conveyor is a device that uses air to transport raw material particles and powders. It is widely used in the material conveying field of injection molding machines, extruders and other equipment. It features convenient installation, simple operation, long-distance conveying and stable operation, and is an auxiliary device for realizing automated production.

[0003] During extruder operation, raw materials are evenly fed into the extruder through the feeding mechanism on the machine body. The raw materials are added to the feed hopper on the feeding mechanism during the feeding process. When the feed hopper is low on raw materials, the suction pump is activated, using a ventilation device to automatically transport the raw materials from the storage container through pipes to the extruder's feed hopper, achieving continuous automated production. Most existing extruders use a suction pump to pump the raw materials. The exhaust from the suction pump is directly released into the atmosphere, resulting in low energy efficiency, high power consumption, and various pollution problems caused by the exhaust, such as noise pollution and particulate matter pollution. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a feeding device for an extruder that improves energy utilization and reduces pollution.

[0005] This utility model discloses a feeding device for an extruder, comprising a feeding platform, a feeding hopper, a storage hopper, and an air supply assembly. The air supply assembly includes an air pump and a cleaning chamber. The top of the feeding hopper is connected to the suction end of the air pump via an air extraction pipe. A filter screen is installed at the bottom of the air extraction pipe inside the feeding hopper. The exhaust end of the air pump is connected to one side of the cleaning chamber via an exhaust pipe. The other side of the cleaning chamber is connected to the bottom of the storage hopper via an exhaust pipe. The storage hopper is equipped with a flow equalization structure, and the top of the storage hopper is connected to the side wall of the feeding hopper via a conveying pipe.

[0006] Furthermore, the cleaning box contains a current tube, a cleaning tube, and a heating tube arranged sequentially. A rotating shaft is rotatably connected inside the current tube, and a fan blade is provided on the outside of the rotating shaft. A magnetic induction power generation mechanism is provided below the current tube. A filter screen is provided inside the cleaning tube, and the top of the filter screen is rotatably connected to the cleaning tube. An electromagnetic block is provided on one side of the filter screen, and the lower end of the filter screen is a magnet. A water storage tank communicating with the cleaning tube is provided below the cleaning tube. A rotating shaft is rotatably connected inside the heating tube, and a friction ball that mates with the inner wall of the heating tube is provided on the outside of the rotating shaft. The magnetic induction power generation mechanism is electrically connected to the electromagnetic block and the friction ball, respectively.

[0007] Furthermore, the magnetic induction power generation mechanism includes a magnetic induction coil and magnetic poles that cooperate with the magnetic induction coil, and the magnetic induction coil is coaxially connected to the rotating shaft.

[0008] Furthermore, an air-filling ring connected to the exhaust pipe is fitted on the outside of the storage tank, and a number of evenly distributed airflow holes are provided on the storage tank, the airflow holes connecting the air-filling ring and the storage tank.

[0009] Furthermore, several of the airflow holes are arranged at an angle upwards.

[0010] Furthermore, the flow equalization structure includes an upper conical section and a lower conical section spaced apart vertically. The diameter of the upper conical section decreases sequentially from top to bottom, and the diameter of the lower conical section increases sequentially from top to bottom. A plurality of evenly distributed pipes are connected between the upper conical section and the lower conical section. A perforated plate is provided on the upper conical section, and a plurality of evenly distributed through holes are provided on the perforated plate.

[0011] Furthermore, the outer extensions of both the upper and lower conical sections are in contact with the inner wall of the storage tank.

[0012] Furthermore, the top of the storage hopper is a conical structure with a diameter decreasing from bottom to top.

[0013] Furthermore, a cleaning mechanism for cleaning the filter screen is provided inside the feeding hopper, and a drive motor for driving the cleaning mechanism is provided outside the feeding hopper.

[0014] Furthermore, the cleaning mechanism includes a brush plate 1 and a brush plate 2 respectively disposed on the upper and lower sides of the filter screen 1. Both brush plates 1 and 2 are provided with bristles that fit against the surface of the filter screen 1. Brush plates 1 and 2 are connected by a rotating shaft 3. The rotating shaft 3 is coaxially disposed with the filter screen and is rotatably connected to the filter screen 1. A slide rail is provided on the inner wall of the suction pipe. A slider is slidably connected in the slide rail. The slider is fixedly connected to the brush plate 1. A gear 1 is disposed on the outer sleeve of the suction pipe. The gear 1 is rotatably connected to the filter screen 1. The two sides of the gear 1 are fixedly connected to the two ends of the brush plate 2 through a connecting rod. A gear 2 is disposed at the output end of the drive motor. The gear 2 meshes with the gear 1.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The material is initially stored in the storage tank. When it needs to be fed to the extruder, air is drawn through the extraction pipe, and the airflow containing the material is transported to the feeding tank through the conveying pipe. Filter screen one is used to block large particles of material, preventing them from entering the extraction pipe and damaging the air pump. The airflow discharged from the air pump enters the cleaning chamber through exhaust pipe one for filtration to remove material particles and other impurities. The cleaned gas is then sent back to the bottom of the storage tank through exhaust pipe two, forming a cycle. This design optimizes the airflow path, reduces energy consumption, and improves the overall system's energy efficiency. The uniform flow structure helps guide the airflow along a predetermined path, making the airflow more evenly distributed throughout the storage tank space and reducing dead zones. The exhaust is not directly discharged into the atmosphere but is treated in the cleaning chamber and then recycled, reducing the emission of noise and particulate matter and other pollutants. It can work well with the extruder to achieve continuous and automatic raw material supply, further improving the automation level of the production line. The enclosed design reduces the possibility of dust flying and improves the safety of the working environment. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the cleaning box of this utility model;

[0021] Figure 4 This is a schematic diagram of the cleaning mechanism of this utility model. Figure 1 ;

[0022] Figure 5 This is a schematic diagram of the cleaning mechanism of this utility model. Figure 2 ;

[0023] Figure 6 This is a schematic diagram of the flow equalization structure of this utility model;

[0024] Figure 7 This is a cross-sectional schematic diagram of the flow equalization structure of this utility model;

[0025] The attached diagram shows the following components: 1. Feeding platform; 2. Feeding hopper; 3. Storage hopper; 4. Air supply assembly; 5. Air pump; 6. Cleaning box; 7. Extraction pipe; 8. Filter screen one; 9. Exhaust pipe one; 10. Exhaust pipe two; 11. Flow equalization structure; 12. Conveying pipe; 13. Current pipe; 14. Cleaning pipe; 15. Heating pipe; 16. Rotating shaft one; 17. Fan blade; 18. Magnetic induction power generation mechanism; 19. Filter screen two; 20. Electromagnetic block; 21. Water storage tank; 2. Rotating shaft two; 23. Friction ball; 24. Magnetic induction coil; 25. Magnetic pole; 26. Air ring; 27. Airflow hole; 28. Upper conical section; 29. ​​Lower conical section; 30. Pipe; 31. Perforated plate; 32. Through hole; 33. Cleaning mechanism; 34. Drive motor; 35. Brush plate one; 36. Brush plate two; 37. Brush bristles; 38. Rotating shaft three; 39. Slide rail; 40. Slider; 41. Gear one; 42. Connecting rod; 43. Gear two. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] like Figures 1 to 7 As shown, a feeding device for an extruder according to the present invention includes a feeding platform 1, on which a feeding hopper 2, a storage hopper 3 and an air supply component 4 are provided; the air supply component 4 includes an air pump 5 and a cleaning box 6. The top of the feeding hopper 2 is connected to the air pump 5 through an air extraction pipe 7. A filter screen 8 is provided at the bottom of the air extraction pipe 7 inside the feeding hopper 2. The exhaust end of the air pump 5 is connected to one side of the cleaning box 6 through an exhaust pipe 9. The other side of the cleaning box 6 is connected to the bottom of the storage hopper 3 through an exhaust pipe 10. A flow equalization structure 11 is provided inside the storage hopper 3. The top of the storage hopper 3 is connected to the side wall of the feeding hopper 2 through a conveying pipe 12.

[0028] The material is initially stored in the storage tank 3. When it needs to be fed to the extruder, air is drawn through the suction pipe 7, and the airflow containing the material is transported to the feeding tank 2 through the conveying pipe 12. The filter screen 8 is used to block large particles of material, preventing them from entering the suction pipe 7 and damaging the air pump 5. The airflow discharged from the air pump 5 enters the cleaning box 6 through the exhaust pipe 9 for filtration to remove material particles and other impurities. The cleaned gas is then sent back to the bottom of the storage tank 3 through the exhaust pipe 10, forming a cycle. This design optimizes the airflow path, reduces energy consumption, and improves the overall energy utilization rate of the system. The flow equalization structure 11 helps guide the airflow along a predetermined path, making the airflow more evenly distributed throughout the space of the storage tank 3 and reducing dead zones. The exhaust is not directly discharged into the atmosphere, but is treated by the cleaning box 6 and then recycled, reducing the emission of pollutants such as noise and particulate matter. It can work well with the extruder to achieve continuous and automatic supply of raw materials, further improving the automation level of the production line. The closed design reduces the possibility of dust flying and improves the safety of the working environment.

[0029] The cleaning chamber 6 contains a current tube 13, a cleaning tube 14, and a heating tube 15 arranged sequentially. A rotating shaft 16 is rotatably connected inside the current tube 13, and a fan blade 17 is mounted on the outside of the rotating shaft 16. A magnetic induction generator 18 is located below the current tube 13. A filter screen 19 is installed inside the cleaning tube 14, with its top rotatably connected to the cleaning tube 14. An electromagnetic block 20 is located on one side of the filter screen 19, and its lower end is a magnet. A water storage tank 21, connected to the cleaning tube 14, is located below the cleaning tube 14. A rotating shaft 22 is rotatably connected inside the heating tube 15, and a friction ball 23, which mates with the inner wall of the heating tube 15, is located on the outside of the rotating shaft 22. The magnetic induction generator 18 is electrically connected to both the electromagnetic block 20 and the friction ball 23. Gas containing material particles enters the cleaning chamber 6, first passing through the current tube 13. The fan blade 17 within the current tube rotates due to the airflow, driving the rotating shaft 15 to rotate. The rotation of shaft one drives the magnetic induction power generation mechanism 18 to generate electrical energy through the principle of magnetic induction; filter screen two 19 is used to filter particulate matter in the gas to ensure that the discharged gas is relatively clean; part of the electrical energy generated by the magnetic induction power generation mechanism 18 is used to activate the electromagnetic block 20 in the cleaning tube 14. When the electromagnetic block 20 is energized, it can attract or repel filter screen two 19, causing filter screen two 19 to vibrate and remove particulate matter on it; water tank 21 is used to collect particulate matter that falls off the filter screen; the cleaned gas continues to flow to the heating tube 15, where it is heated by the friction between the friction ball 23 and the inner wall of the heating tube 15, heating and removing any moisture that may be carried in the gas; the heated and cleaned gas is introduced into the storage tank 3, where the flow equalization structure 11 makes the airflow evenly distributed, fully contacting the upward-moving material for drying, preventing the material from clumping due to moisture and clogging the conveying pipe.

[0030] As a preferred embodiment of the above, the magnetic induction power generation mechanism 18 includes a magnetic induction coil 24 and magnetic poles 25 that cooperate with the magnetic induction coil 24. The magnetic induction coil 24 is coaxially connected to the rotating shaft 16. When gas enters the cleaning box 6 and passes through the current tube 13, the airflow drives the fan blade 17 to rotate. The rotational motion of the fan blade 17 is transmitted to the magnetic induction coil 24 through the rotating shaft 16, causing the magnetic induction coil 24 to start rotating as well. When the magnetic pole 25 moves relative to the magnetic induction coil 24, a changing magnetic field is generated in the magnetic induction coil 24, thereby inducing an electromotive force and current in the closed circuit. The energy of the airflow flowing through the system is used to convert it into electrical energy, thereby achieving self-sufficient power supply and reducing the demand for external power sources.

[0031] As a preferred embodiment of the above embodiment, an air-filling ring 26 connected to the exhaust pipe 10 is sleeved on the outside of the storage tank 3. The storage tank 3 is provided with a plurality of evenly distributed airflow holes 27, which connect the air-filling ring 26 and the storage tank 3. The design of the airflow holes 27 ensures that the gas introduced from the air-filling ring 26 can enter the storage tank 3 evenly. The uniform airflow further helps to loosen the material, thereby improving the efficiency and quality of material conveying, and also helps to optimize the overall performance of the system.

[0032] As a preferred embodiment of the above, a number of airflow holes 27 are arranged at an angle upwards; the upward airflow generated by this design can promote the mixing of materials at different positions, ensure the uniform distribution of materials in the entire storage tank 3, and form an upward flow trend, pushing the materials toward the conveying pipe 12, which helps the materials to be conveyed more evenly and quickly, and improves the conveying efficiency of the entire system.

[0033] As a preferred embodiment of the above, the flow equalization structure 11 includes an upper conical section 28 and a lower conical section 29 spaced apart vertically. The diameter of the upper conical section 28 decreases sequentially from top to bottom, while the diameter of the lower conical section 29 increases sequentially from top to bottom. A plurality of evenly distributed pipes 30 are provided between the upper conical section 28 and the lower conical section 29. A perforated plate 31 is provided on the upper conical section 28, and a plurality of evenly distributed through holes 32 are provided on the perforated plate 31. After the cleaned gas enters the storage tank 3, the airflow is better distributed in the storage tank 3 through the design of the upper conical section 28 and the lower conical section 29 and the evenly distributed pipes 30. The through holes 32 on the perforated plate 31 can prevent large particles from entering the upper conical section, reducing the risk of blockage. The flow equalization structure 11 optimizes the airflow path to ensure that the airflow can effectively lift and disperse the material, thereby improving the performance and efficiency of the entire system.

[0034] As a preferred embodiment of the above, the outer extensions of both the upper conical section 28 and the lower conical section 29 are in contact with the inner wall of the storage tank 3; this design prevents gas from flowing along the side wall and ensures that the airflow flows upward through the pipe 30.

[0035] As a preferred embodiment of the above, the top of the storage bin 3 is a conical structure with the diameter decreasing from bottom to top; the conical structure helps to guide the material to concentrate towards the center, making it easier for the material to be transported to the feeding bin 2 through the conveying pipe 12; it reduces the accumulation of material at the top of the storage bin 3 during the movement of the material, avoiding the formation of dead corners or material accumulation; it makes the airflow more smooth, reduces airflow resistance, and improves the airflow efficiency of the entire system.

[0036] As a preferred embodiment of the above embodiment, a cleaning mechanism 33 for cleaning the filter screen 8 is provided inside the feeding hopper 2, and a drive motor 34 for driving the cleaning mechanism 33 is provided outside the feeding hopper 2; the cleaning mechanism 33 cleans the filter screen 8 regularly to ensure that the filter screen 8 is unobstructed and to prevent the system efficiency from decreasing or malfunctioning due to blockage; the cleaning action is automatically triggered by the control system to reduce the need for manual intervention and improve the level of automation.

[0037] As a preferred embodiment of the above, the cleaning mechanism 33 includes a first brush plate 35 and a second brush plate 36 respectively disposed on the upper and lower sides of the first filter screen 8. Both the first brush plate 35 and the second brush plate 36 are provided with bristles 37 that adhere to the surface of the first filter screen 8. The first brush plate 35 and the second brush plate 36 are connected by a third rotating shaft 38, which is coaxially disposed with the first filter screen 8 and rotatably connected to it. A slide rail 39 is provided on the inner wall of the suction pipe 7, and a slider 40 is slidably connected within the slide rail 39. The slider 40 is fixedly connected to the first brush plate 35. A gear 41 is sleeved on the suction pipe 7, rotatably connected to the first filter screen 8. The two sides of the gear 41 are connected to the brush plates via connecting rods 42. The two ends of the second brush plate 36 are fixedly connected. The output end of the drive motor 34 is equipped with a second gear 43, which meshes with the first gear 41. When the drive motor 34 starts, it drives the second gear 43 to rotate, which in turn drives the first gear 41 to rotate. The first gear 41 drives the second brush plate 36 to rotate through the connecting rod 42, and at the same time drives the first brush plate 35 to rotate through the rotating shaft 38. The bristles 37 on the first brush plate 35 and the second brush plate 36 are in close contact with the surface of the first filter screen 8, physically removing the material particles attached to the filter screen. The brush plate design on the upper and lower sides can more thoroughly remove the material particles on the filter screen. The slider 40 slides in the slide rail 39 to ensure that the first brush plate 35 can move smoothly along the surface of the first filter screen 8.

[0038] This utility model discloses a feeding device for an extruder. During operation, the air pump 5 starts, drawing in air and material particles from the feeding hopper 2 through the suction pipe 7. Raw material enters the feeding hopper 2 from the storage hopper 3 via the conveying pipe 12. A filter screen 8 blocks large particles, preventing them from entering the suction pipe 7 and the air pump 5. The airflow from the air pump 5 enters the cleaning chamber 6 through the exhaust pipe 9. Inside the cleaning chamber 6, the fan blades 17 in the current tube 13 rotate due to the airflow, driving the rotating shaft 16 to rotate. The magnetic induction coil 24 in the magnetic induction power generation mechanism 18 interacts with the magnetic pole 25 to generate electrical energy. The filter screen 19 inside the cleaning pipe 14 captures particulate matter in the airflow; the electromagnetic block 20 is periodically energized, causing the filter screen 19 to vibrate or flip, removing accumulated material particles; the gas then passes through the heating pipe 15, where the friction ball 23 generates heat between itself and the inner wall of the heating pipe, heating the gas and removing some moisture; after cleaning and heating, part of the gas enters the bottom of the storage tank 3 through the exhaust pipe 10, where it is gathered in the lower cone section 29 and then enters the upper cone section 28 through the evenly distributed pipes 30, where it is re-diffused and passes through the perforated plate 3. The material is evenly discharged upward through the through hole 32 on the filter screen 1, giving the material an upward force. Another part enters the air-filling ring 26, which introduces gas into the middle of the storage tank 3 through the inclined upward airflow hole 27, further pushing the material upward. The conical structure at the top of the storage tank 3 helps guide the material to concentrate towards the center, making it easier for the material to be transported to the feeding tank 2 through the conveying pipe 12. When a certain amount of material is detected to have accumulated on the filter screen 8, the drive motor 34 starts, driving the gear 43 to rotate. The gear 43 meshes with the gear 41, driving the gear 41 to rotate. The gear 41 drives the gear 41 to rotate through the connecting rod 42. The second brush plate 36 rotates, simultaneously driving the first brush plate 35 to rotate via the third rotating shaft 38. The bristles 37 on the first brush plate 35 and the second brush plate 36 are in close contact with the upper and lower surfaces of the first filter screen 8, physically removing material particles adhering to the first filter screen 8. The slider 40 slides within the slide rail 39, ensuring that the first brush plate 35 can move smoothly along the surface of the first filter screen 8. After cleaning, the drive motor 34 is stopped, and the first brush plate 35 and the second brush plate 36 stop rotating. The cleaned first filter screen 8 is restored to unobstructed flow, continuing to effectively block large particles. The material is continuously transported from the storage tank 3 to the supply tank 2 through the conveying pipe 12.

[0039] The present invention relates to a feeding device for an extruder. Its installation, connection or setting methods are all common mechanical methods, and any method that can achieve its beneficial effect can be implemented.

[0040] The above description is merely a preferred embodiment of this utility model. It should be noted that for those skilled in the art, without departing from the technical principles of this utility model, various methods can be employed to achieve the same result.

[0041] Furthermore, several improvements and modifications can be made, and these improvements and modifications should also be considered as part of this utility model.

[0042] The scope of protection for the type.

Claims

1. A material suction device for use with an extruder, characterized in that, The system includes a feeding platform (1), on which a feeding bucket (2), a storage bucket (3), and an air supply component (4) are provided. The air supply component (4) includes an air pump (5) and a cleaning box (6). The top of the feeding bucket (2) is connected to the suction end of the air pump (5) through an air extraction pipe (7). The bottom of the air extraction pipe (7) inside the feeding bucket (2) is provided with a filter screen (8). The exhaust end of the air pump (5) is connected to one side of the cleaning box (6) through an exhaust pipe (9). The other side of the cleaning box (6) is connected to the bottom of the storage bucket (3) through an exhaust pipe (2) (10). The storage bucket (3) is provided with a flow equalization structure (11). The top of the storage bucket (3) is connected to the side wall of the feeding bucket (2) through a conveying pipe (12).

2. The material suction device for an extruder as described in claim 1, characterized in that, The cleaning box (6) contains a current tube (13), a cleaning tube (14), and a heating tube (15) arranged sequentially. A rotating shaft (16) is rotatably connected inside the current tube (13). A fan blade (17) is located on the outside of the rotating shaft (16). A magnetic induction power generation mechanism (18) is located below the current tube (13). A filter screen (19) is installed inside the cleaning tube (14). The top of the filter screen (19) is rotatably connected to the cleaning tube (14). An electromagnetic block (20) is provided on one side of the second filter screen (19). The lower end of the second filter screen (19) is a magnet. A water storage tank (21) connected to the cleaning pipe (14) is provided below the cleaning pipe (14). A rotating shaft (22) is rotatably connected inside the heating pipe (15). A friction ball (23) that cooperates with the inner wall of the heating pipe (15) is provided on the outside of the rotating shaft (22). The magnetic induction power generation mechanism (18) is electrically connected to the electromagnetic block (20) and the friction ball (23) respectively.

3. The material suction device for an extruder as described in claim 2, characterized in that, The magnetic induction power generation mechanism (18) includes a magnetic induction coil (24) and magnetic poles (25) that cooperate with the magnetic induction coil (24). The magnetic induction coil (24) is coaxially connected to a rotating shaft (16).

4. The material suction device for an extruder as described in claim 1, characterized in that, The storage tank (3) is fitted with an air filling ring (26) that communicates with the exhaust pipe (10) on the outside. The storage tank (3) is provided with a number of evenly distributed airflow holes (27), and the airflow holes (27) communicate with the air filling ring (26) and the storage tank (3).

5. The material suction device for an extruder as described in claim 4, characterized in that, Several of the airflow holes (27) are arranged at an angle upwards.

6. The material suction device for an extruder as described in claim 1, characterized in that, The flow equalization structure (11) includes an upper conical section (28) and a lower conical section (29) spaced apart vertically. The diameter of the upper conical section (28) decreases from top to bottom, and the diameter of the lower conical section (29) increases from top to bottom. A number of evenly distributed pipes (30) are connected between the upper conical section (28) and the lower conical section (29). A perforated plate (31) is provided on the upper conical section (28), and a number of evenly distributed through holes (32) are provided on the perforated plate (31).

7. The material suction device for an extruder as described in claim 6, characterized in that, The outer extensions of the upper conical section (28) and the lower conical section (29) are both in contact with the inner wall of the storage bucket (3).

8. The material suction device for an extruder as described in claim 1, characterized in that, The top of the storage hopper (3) is a conical structure with the diameter decreasing from bottom to top.

9. The material suction device for an extruder as described in claim 1, characterized in that, The feed hopper (2) is equipped with a cleaning mechanism (33) for cleaning the filter screen (8), and a drive motor (34) for driving the cleaning mechanism (33) is provided on the outside of the feed hopper (2).

10. The feeding device for an extruder as described in claim 9, characterized in that, The cleaning mechanism (33) includes a brush plate 1 (35) and a brush plate 2 (36) respectively disposed on the upper and lower sides of the filter screen 1 (8). Both the brush plate 1 (35) and the brush plate 2 (36) are provided with bristles (37) that are in contact with the surface of the filter screen 1 (8). The brush plate 1 (35) and the brush plate 2 (36) are connected by a rotating shaft 3 (38). The rotating shaft 3 (38) is coaxially disposed with the filter screen 1 (8) and is rotatably connected to the filter screen 1 (8). The inner wall of the suction pipe (7) is provided with a sliding... The slide rail (39) has a slider (40) slidably connected inside it. The slider (40) is fixedly connected to the brush plate (35). The suction pipe (7) is fitted with a gear (41). The gear (41) is rotatably connected to the filter screen (8). The two sides of the gear (41) are fixedly connected to the two ends of the brush plate (36) through the connecting rod (42). The output end of the drive motor (34) is provided with a gear (43). The gear (43) meshes with the gear (41).

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