Water purifying and filtering device for waterworks

Abstract

The utility model discloses a water purifying and filtering device of a waterworks, which relates to the field of sewage filtering of the waterworks and comprises a mounting box, a filtering mechanism is fixedly connected to the left side of the mounting box, a supporting plate is fixedly connected to the upper side of the mounting box, and a mixing mechanism is fixedly connected to the upper side of the supporting plate. The inner bottom wall of the mounting box is fixedly connected with a medicament box, and the inner wall of the mounting box is fixedly connected with an injection mechanism. The injection mechanism is arranged, the T-shaped connecting sliding block is driven by the driving motor to move, the T-shaped connecting sliding block moves up and down through forward and reverse rotation of the driving motor, so that the piston in the sleeve moves, and a medicament is quantitatively injected into the mixing mechanism to be mixed with sewage through limitation of the water absorption one-way valve and the water outlet one-way valve; a worker does not need to measure the volume of the sewage for many times, so that the labor burden of the worker is reduced, and the waste of chemicals is avoided.

Description

Technical Field

[0001] This utility model relates to the field of wastewater filtration in waterworks, and in particular to a water purification and filtration device for waterworks. Background Technology

[0002] Waterworks draw water from rivers and lakes, then it undergoes coagulation, sedimentation, filtration, and is sent to a clear water tank for disinfection. Finally, it is pumped under high pressure into the water supply pipeline and distributed to users.

[0003] During the filtration process, a flocculant is mixed with the wastewater. The flocculant mainly involves positively (or negatively) charged groups and negatively (or positively) charged particles or particles in the water that are difficult to separate, bringing them closer together, reducing their potential, and making them unstable. The flocculant then uses its polymerization properties to concentrate these particles, which are then separated by physical or chemical methods. Insufficient flocculant will affect the filtration effect. To avoid wasting flocculant, staff need to quantitatively control the amount of flocculant added to the wastewater. Frequent calculations will increase the workload of the staff. Therefore, a water purification and filtration device for waterworks is needed to solve the above-mentioned shortcomings. Utility Model Content

[0004] The purpose of this invention is to provide a water purification and filtration device for waterworks to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water purification and filtration device for a waterworks, comprising an installation box, a filtration mechanism fixedly connected to the left side of the installation box, a support plate fixedly connected to the upper side of the installation box, a mixing mechanism fixedly connected to the upper side of the support plate, a reagent tank fixedly connected to the inner bottom wall of the installation box, and an injection mechanism fixedly connected to the inner wall of the installation box.

[0006] The injection mechanism includes a mounting plate fixedly connected to the inner wall of the mounting box. A drug-drawing assembly is fixedly connected to the upper side of the mounting plate. The drug-drawing assembly includes a sleeve fixedly connected to the upper side of the mounting plate. A piston is slidably connected to the inner wall of the sleeve. A connecting rod is fixedly connected to the upper side of the piston. The upper end of the connecting rod passes through the upper side of the sleeve and is fixedly connected to a connecting plate. The surface of the connecting plate is slidably connected to the inner wall of the mounting box.

[0007] Preferably, the drug extraction assembly further includes a water suction hole opened on the lower side of the sleeve, a water suction pipe fixedly connected to the inner wall of the water suction hole, the bottom end of the water suction pipe penetrating the inner top wall of the drug tank and extending to the bottom of the drug tank, and a water suction one-way valve fixedly connected to the surface of the water suction pipe.

[0008] Preferably, the drug extraction assembly further includes a collection box fixedly connected to the upper side of the drug tank, a water outlet is provided on the lower side of the sleeve, a water outlet pipe is fixedly connected to the inner wall of the water outlet, the bottom end of the water outlet pipe penetrates the inner top wall of the collection box, and a one-way valve is fixedly connected to the surface of the water outlet pipe.

[0009] Preferably, the injection mechanism further includes a power assembly fixedly connected to the upper side of the mounting plate. The power assembly includes a slide rail on the upper side of the mounting plate. A drive screw is rotatably connected to the upper side of the mounting plate. A drive motor is fixedly connected to the upper side of the medicine tank. The output end of the drive motor passes through the upper side of the mounting plate and is fixedly connected to the bottom end of the drive screw. A T-shaped connecting slider is threadedly connected to the drive screw. The left side of the T-shaped connecting slider is fixedly connected to the right side of the connecting plate.

[0010] Preferably, the mixing mechanism includes a mixing box fixedly connected to the upper side of the support plate, a water filling window on the upper side of the mixing box, an outlet hole on the lower side of the mixing box, an outlet pipe fixedly connected to the inner wall of the outlet hole, an outlet valve fixedly connected to the surface of the outlet pipe, an injection hole on the front side of the mixing box, an injection pipe fixedly connected to the inner wall of the injection hole, the bottom end of the injection pipe penetrating the front inner wall of the collecting box, a shim plate fixedly connected to the upper side of the support plate, a gear box fixedly connected to the upper side of the shim plate, a first bevel gear rotatably connected to the inner bottom wall of the gear box, and a second bevel gear rotatably connected to the left inner wall of the gear box, wherein the first bevel gear meshes with the second bevel gear.

[0011] Preferably, the upper side of the first bevel gear is provided with a first mounting hole, the inner wall of the first mounting hole is fixedly connected to the surface of the drive screw, the left side of the second bevel gear is provided with a second mounting hole, the inner wall of the second mounting hole is fixedly connected to a drive shaft, the left end of the drive shaft is rotatably connected to the left inner wall of the mixing box, and the surface of the drive shaft is fixedly connected to a stirring rod.

[0012] Preferably, the filtration mechanism includes a filter box fixedly connected to the left side of the mounting box, a first converging funnel fixedly connected to the inner wall of the filter box, a filter plate fixedly connected to the inner wall of the filter box, a second converging funnel fixedly connected to the inner wall of the filter box, a discharge hole opened on the left side of the filter box, a discharge pipe fixedly connected to the inner wall of the discharge hole, and the top end of the discharge pipe fixedly connected to the output end of the second converging funnel.

[0013] Preferably, a flow-limiting component is fixedly connected to the inner wall of the filter box. The flow-limiting component includes a shelf fixedly connected to the inner wall of the filter box. An electric telescopic rod is fixedly connected to the upper side of the shelf. A movable plate is fixedly connected to the output end of the electric telescopic rod. The lower side of the movable plate is slidably connected to the upper side of the shelf. A baffle plate is fixedly connected to the right side of the movable plate.

[0014] In summary, the technical effects and advantages of this utility model are as follows:

[0015] 1. In this utility model, by setting up an injection mechanism, a drive motor is used as a power source to drive the lead screw to rotate. When the lead screw rotates, it can drive the T-shaped connecting slider to move. The forward and reverse rotation of the drive motor causes the T-shaped connecting slider to move up and down, which causes the piston in the sleeve to move. By using the water suction check valve and the water discharge check valve to limit the amount of agent injected into the mixing mechanism, it can be mixed with the sewage. There is no need for the staff to measure and calculate the sewage volume multiple times, which not only reduces the workload of the staff, but also avoids the waste of agents.

[0016] 2. In this utility model, by setting up a mixing mechanism, while the injection mechanism is operating, the transmission of the first bevel gear and the second bevel gear is used to drive the transmission shaft to rotate the stirring shaft, so that the agent and the sewage are fully mixed, ensuring the flocculation effect of the agent;

[0017] 3. In this utility model, by setting up a filtration mechanism, the flow rate of the mixed liquid flowing out of the first collecting funnel is controlled by using an electric telescopic rod to drive the baffle plate. This allows the mixed liquid sufficient time to contact the filter plate, preventing excessive mixed liquid from flowing to the filter plate and causing some small particles of impurities to leak through the filter plate under the impact of water pressure, thus ensuring the filtration effect of the filter plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional view of the mounting box in an embodiment of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the injection component (slide section) in an embodiment of the present utility model;

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the drug extraction component (sleeve section) in an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the front structure of the drug extraction assembly (sleeve section) in an embodiment of the present invention;

[0024] Figure 6 This is a three-dimensional structural schematic diagram of the mixing mechanism (cross-sectional view of the mixing box and the gear box) in an embodiment of this utility model;

[0025] Figure 7 This is a three-dimensional structural schematic diagram of the filtration mechanism (filter box section) in an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the front structure of the filtration mechanism (filter box section) in an embodiment of this utility model.

[0027] In the diagram: 1. Mounting box; 2. Filter box; 3. Support plate; 4. Mixing box; 5. Water inlet window; 6. Chemical tank; 7. Mounting plate; 8. Sleeve; 9. Piston; 10. Connecting rod; 11. Connecting plate; 12. Drive motor; 13. Slide rail; 14. Drive screw; 15. T-shaped connecting slider; 16. Converging box; 17. Suction pipe; 18. Suction check valve; 19. Outlet pipe; 20. Outlet check valve; 21. Elevating plate; 22. Gear box; 23. First bevel gear; 24. Second bevel gear; 25. Drive shaft; 26. Stirring rod; 27. Outlet pipe; 28. Outlet valve; 29. ​​First converging funnel; 30. Shelf; 31. Electric telescopic rod; 32. Moving plate; 33. Water baffle; 34. Filter plate; 35. Second converging funnel; 36. Discharge pipe; 37. Injection pipe. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example: Reference Figures 1-8 The water purification and filtration device for a waterworks shown includes an installation box 1. A filtration mechanism is fixedly connected to the left side of the installation box 1. A support plate 3 is fixedly connected to the upper side of the installation box 1. A mixing mechanism is fixedly connected to the upper side of the support plate 3. A reagent tank 6 is fixedly connected to the inner bottom wall of the installation box 1. An injection mechanism is fixedly connected to the inner wall of the installation box 1.

[0030] The injection mechanism includes a mounting plate 7 fixedly connected to the inner wall of the mounting box 1. A drug extraction assembly is fixedly connected to the upper side of the mounting plate 7. The drug extraction assembly includes a sleeve 8 fixedly connected to the upper side of the mounting plate 7. A piston 9 is slidably connected to the inner wall of the sleeve 8. A connecting rod 10 is fixedly connected to the upper side of the piston 9. The upper end of the connecting rod 10 passes through the upper side of the sleeve 8 and is fixedly connected to a connecting plate 11. The surface of the connecting plate 11 is slidably connected to the inner wall of the mounting box 1.

[0031] With the above structure, the mounting box 1 is set as the main position for component installation, which is separate from the filtration mechanism used for filtering and removing impurities. The support plate 3 provides support for the mixing mechanism. The chemical tank 6 contains flocculant to remove impurities in the sewage. The movement of the piston 9 causes a change in the internal pressure of the sleeve 8, which allows the chemical extraction assembly to quantitatively extract the chemical from the chemical tank 6 and inject it into the mixing mechanism.

[0032] Preferably, the drug extraction assembly further includes a water suction hole opened on the lower side of the sleeve 8, and a water suction pipe 17 is fixedly connected to the inner wall of the water suction hole. The bottom end of the water suction pipe 17 penetrates the inner top wall of the drug tank 6 and extends to the bottom of the drug tank 6. A water suction one-way valve 18 is fixedly connected to the surface of the water suction pipe 17.

[0033] By setting a one-way valve 18 to restrict the flow direction of the liquid medicine, when the piston 9 moves upward, the liquid medicine in the medicine tank 6 enters the sleeve 8 through the suction pipe 17. When the piston 9 moves downward, the liquid medicine in the sleeve 8 cannot return to the medicine tank 6.

[0034] Preferably, the drug extraction assembly also includes a collection box 16 fixedly connected to the upper side of the drug tank 6, a water outlet hole is provided on the lower side of the sleeve 8, a water outlet pipe 19 is fixedly connected to the inner wall of the water outlet hole, the bottom end of the water outlet pipe 19 penetrates the inner top wall of the collection box 16, and a water outlet one-way valve 20 is fixedly connected to the surface of the water outlet pipe 19.

[0035] By setting up a collection box 16 to collect the chemicals flowing out of the two sleeves 8, and a one-way valve 20 to restrict the flow direction of the chemicals, when the piston 9 moves downward, the chemicals in the sleeves 8 can enter the collection box 16, but when the piston 9 moves upward, the chemicals in the collection box 16 cannot return to the sleeves 8.

[0036] Preferably, the injection mechanism further includes a power assembly fixedly connected to the upper side of the mounting plate 7. The power assembly includes a slide rail 13 on the upper side of the mounting plate 7. A drive screw 14 is rotatably connected to the upper side of the mounting plate 7. A drive motor 12 is fixedly connected to the upper side of the medicine tank 6. The output end of the drive motor 12 passes through the upper side of the mounting plate 7 and is fixedly connected to the bottom end of the drive screw 14. A T-shaped connecting slider 15 is threadedly connected to the drive screw 14. The left side of the T-shaped connecting slider 15 is fixedly connected to the right side of the connecting plate 11.

[0037] By setting the drive motor 12 as the power source of the power component, the rotation of the drive motor 12 drives the drive screw 14 to rotate. When the drive motor 12 rotates forward, it drives the drive screw 14 to rotate clockwise, driving the T-type connecting slider 15 to move upward. When the drive motor 12 rotates in reverse, it drives the drive screw 14 to rotate counterclockwise, driving the T-type connecting slider 15 to move downward.

[0038] Preferably, the mixing mechanism includes a mixing box 4 fixedly connected to the upper side of the support plate 3. A water filling window 5 is provided on the upper side of the mixing box 4, and an outlet hole is provided on the lower side of the mixing box 4. An outlet pipe 27 is fixedly connected to the inner wall of the outlet hole, and an outlet valve 28 is fixedly connected to the surface of the outlet pipe 27. An injection hole is provided on the front side of the mixing box 4, and an injection pipe 37 is fixedly connected to the inner wall of the injection hole. The bottom end of the injection pipe 37 penetrates the front inner wall of the collecting box 16. A shim plate 21 is fixedly connected to the upper side of the support plate 3, and a gear box 22 is fixedly connected to the upper side of the shim plate 21. A first bevel gear 23 is rotatably connected to the inner bottom wall of the gear box 22, and a second bevel gear 24 is rotatably connected to the left inner wall of the gear box 22. The first bevel gear 23 and the second bevel gear 24 mesh.

[0039] By setting up a mixing tank 4 as a place for mixing sewage and chemicals, and a water inlet window 5 to facilitate the addition of sewage that needs to be filtered by staff, the diameter of the injection pipe 37 is smaller than that of the outlet pipe 19, and when the piston 9 moves downward, there is enough pressure to send the chemicals into the mixing tank 4. The cooperation between the first bevel gear 23 and the second bevel gear 24 changes the direction of force.

[0040] Preferably, a first mounting hole is provided on the upper side of the first bevel gear 23, and the inner wall of the first mounting hole is fixedly connected to the surface of the drive screw 14. A second mounting hole is provided on the left side of the second bevel gear 24, and a drive shaft 25 is fixedly connected to the inner wall of the second mounting hole. The left end of the drive shaft 25 is rotatably connected to the left inner wall of the mixing box 4, and a stirring rod 26 is fixedly connected to the surface of the drive shaft 25.

[0041] By setting the first mounting hole to leave space for the installation of the drive screw 14, the rotation of the first bevel gear 23 can drive the rotation of the second bevel gear 24, thereby allowing the stirring rod 26 to stir the sewage and the agent, making the two mix more evenly and ensuring the flocculation effect.

[0042] Preferably, the filtration mechanism includes a filter box 2 fixedly connected to the left side of the mounting box 1, a first converging funnel 29 fixedly connected to the inner wall of the filter box 2, a filter plate 34 fixedly connected to the inner wall of the filter box 2, a second converging funnel 35 fixedly connected to the inner wall of the filter box 2, a discharge hole opened on the left side of the filter box 2, a discharge pipe 36 fixedly connected to the inner wall of the discharge hole, and the top end of the discharge pipe 36 fixedly connected to the output end of the second converging funnel 35.

[0043] The mixture discharged from the mixing tank 4 is collected by the first collecting funnel 29, and the mixture is allowed to flow through the inclined filter plate 34 to achieve solid-liquid separation. The clean liquid falls into the second collecting funnel 35 and is finally discharged through the discharge pipe 36 to proceed to the next step.

[0044] Preferably, a flow limiting component is fixedly connected to the inner wall of the filter box 2. The flow limiting component includes a shelf 30 fixedly connected to the inner wall of the filter box 2, an electric telescopic rod 31 fixedly connected to the upper side of the shelf 30, a movable plate 32 fixedly connected to the output end of the electric telescopic rod 31, a sliding connection between the lower side of the movable plate 32 and the upper side of the shelf 30, and a baffle plate 33 fixedly connected to the right side of the movable plate 32.

[0045] By setting up a flow-limiting component, the extension and retraction of the electric telescopic rod 31 drives the water sealing plate to move, thereby controlling the flow rate of the mixed liquid to the filter plate 34 and ensuring the filtration effect of the filter plate 34.

[0046] The working principle of this utility model is as follows: A water purification and filtration device for a waterworks is used such that a certain amount of wastewater is added to the mixing tank 4 through the water inlet window 5. Then, the drive motor 12 is started and rotates forward. The drive motor 12 drives the drive screw 14 to rotate, which in turn drives the T-shaped connecting slider 15 to move upward. The movement of the T-shaped connecting slider 15 drives the connecting plate 11 to move, which in turn drives the connecting rod 10 to move. The movement of the connecting rod 10 drives the piston 9 to move upward. Due to the restriction of the suction check valve 18 and the discharge check valve 20, the flocculant in the reagent tank 6 enters the sleeve 8 through the suction pipe 17. When the T-shaped connecting slider 15 reaches the designed highest point, the motor reverses, causing the T-shaped connecting slider 15 to move downward. The motor is turned off at the lowest point of the T-shaped connecting slider 15. As the T-shaped connecting slider 15 descends, it drives the piston 9 to move downward. The medicine in the two sleeves 8 enters the collecting box 16 through the water outlet pipe 19. Finally, under pressure, it is injected into the mixing box 4 through the injection pipe 37. While the drive screw 14 rotates, it drives the first bevel gear 23 to rotate. The rotation of the first bevel gear 23 drives the second bevel gear 24 to rotate. The rotation of the second bevel gear 24 drives the drive shaft 25 to rotate. The rotation of the drive shaft 25 drives the stirring shaft to rotate. After mixing for a period of time, the outlet valve 28 is opened to allow the mixture to enter the second collecting funnel 35. Then, the electric telescopic rod 31 is controlled to open the water sealing plate slightly, allowing the mixture to be filtered and collected through the filter plate 34.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water purification and filtration device for a waterworks, comprising an installation box (1), characterized in that: A filter mechanism is fixedly connected to the left side of the installation box (1), a support plate (3) is fixedly connected to the upper side of the installation box (1), a mixing mechanism is fixedly connected to the upper side of the support plate (3), a medicine box (6) is fixedly connected to the inner bottom wall of the installation box (1), and an injection mechanism is fixedly connected to the inner wall of the installation box (1). The injection mechanism includes a mounting plate (7) fixedly connected to the inner wall of the mounting box (1). A drug extraction assembly is fixedly connected to the upper side of the mounting plate (7). The drug extraction assembly includes a sleeve (8) fixedly connected to the upper side of the mounting plate (7). A piston (9) is slidably connected to the inner wall of the sleeve (8). A connecting rod (10) is fixedly connected to the upper side of the piston (9). The upper end of the connecting rod (10) passes through the upper side of the sleeve (8) and is fixedly connected to a connecting plate (11). The surface of the connecting plate (11) is slidably connected to the inner wall of the mounting box (1).

2. The water purification and filtration device for a waterworks according to claim 1, characterized in that: The drug extraction assembly also includes a water suction hole opened on the lower side of the sleeve (8). A water suction pipe (17) is fixedly connected to the inner wall of the water suction hole. The bottom end of the water suction pipe (17) penetrates the inner top wall of the drug tank (6) and extends to the bottom of the drug tank (6). A water suction one-way valve (18) is fixedly connected to the surface of the water suction pipe (17).

3. The water purification and filtration device for a waterworks according to claim 1, characterized in that: The drug extraction assembly also includes a collection box (16) fixedly connected to the upper side of the drug tank (6). A water outlet is provided on the lower side of the sleeve (8). A water outlet pipe (19) is fixedly connected to the inner wall of the water outlet. The bottom end of the water outlet pipe (19) penetrates the inner top wall of the collection box (16). A one-way valve (20) is fixedly connected to the surface of the water outlet pipe (19).

4. The water purification and filtration device for a waterworks according to claim 1, characterized in that: The injection mechanism also includes a power assembly fixedly connected to the upper side of the mounting plate (7). The power assembly includes a slide rail (13) on the upper side of the mounting plate (7). A drive screw (14) is rotatably connected to the upper side of the mounting plate (7). A drive motor (12) is fixedly connected to the upper side of the medicine tank (6). The output end of the drive motor (12) passes through the upper side of the mounting plate (7) and is fixedly connected to the bottom end of the drive screw (14). The drive screw (14) is threadedly connected to a T-shaped connecting slider (15). The left side of the T-shaped connecting slider (15) is fixedly connected to the right side of the connecting plate (11).

5. A water purification and filtration device for a waterworks according to claim 1, characterized in that: The mixing mechanism includes a mixing box (4) fixedly connected to the upper side of the support plate (3). A water filling window (5) is provided on the upper side of the mixing box (4). An outlet hole is provided on the lower side of the mixing box (4). An outlet pipe (27) is fixedly connected to the inner wall of the outlet hole. An outlet valve (28) is fixedly connected to the surface of the outlet pipe (27). An injection hole is provided on the front side of the mixing box (4). An injection pipe (37) is fixedly connected to the inner wall of the injection hole. The bottom end of the injection pipe (37) penetrates the front inner wall of the collecting box (16). A shim plate (21) is fixedly connected to the upper side of the support plate (3). A gear box (22) is fixedly connected to the upper side of the shim plate (21). A first bevel gear (23) is rotatably connected to the inner bottom wall of the gear box (22). A second bevel gear (24) is rotatably connected to the left inner wall of the gear box (22). The first bevel gear (23) and the second bevel gear (24) mesh.

6. A water purification and filtration device for a waterworks according to claim 5, characterized in that: The first bevel gear (23) has a first mounting hole on its upper side. The inner wall of the first mounting hole is fixedly connected to the surface of the drive screw (14). The second bevel gear (24) has a second mounting hole on its left side. The inner wall of the second mounting hole is fixedly connected to a drive shaft (25). The left end of the drive shaft (25) is rotatably connected to the inner wall of the left side of the mixing box (4). The surface of the drive shaft (25) is fixedly connected to a stirring rod (26).

7. A water purification and filtration device for a waterworks according to claim 1, characterized in that: The filtration mechanism includes a filter box (2) fixedly connected to the left side of the mounting box (1). A first converging funnel (29) is fixedly connected to the inner wall of the filter box (2). A filter plate (34) is fixedly connected to the inner wall of the filter box (2). A second converging funnel (35) is fixedly connected to the inner wall of the filter box (2). A discharge hole is opened on the left side of the filter box (2). A discharge pipe (36) is fixedly connected to the inner wall of the discharge hole. The top end of the discharge pipe (36) is fixedly connected to the output end of the second converging funnel (35).

8. A water purification and filtration device for a waterworks according to claim 7, characterized in that: The inner wall of the filter box (2) is fixedly connected to a flow limiting component. The flow limiting component includes a shelf (30) fixedly connected to the inner wall of the filter box (2). An electric telescopic rod (31) is fixedly connected to the upper side of the shelf (30). A movable plate (32) is fixedly connected to the output end of the electric telescopic rod (31). The lower side of the movable plate (32) is slidably connected to the upper side of the shelf (30). A baffle plate (33) is fixedly connected to the right side of the movable plate (32).

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