Filter element type paint sand prevention filter

Abstract

The invention provides a filter element type paint sand prevention filter which comprises a storage tank, a feeding port is formed in the upper portion of the side wall of the storage tank, a plurality of discharging ports are formed in the lower portion of the side wall in the circumferential direction, a discharging port is formed in the bottom of the storage tank, electric control valves are arranged at the discharging ports, a sealing cover is arranged at the discharging port, and a driving motor is arranged at the top of the storage tank. The power output end of the driving motor is connected with the input end of the speed reducer; the output end of the speed reducer is provided with a driving gear; the top of the storage tank is provided with a support frame corresponding to each discharge port, the support frame is rotatably provided with a rotating shaft, one end of the rotating shaft is provided with a driven gear meshed with the driving gear, and the other end of the rotating shaft is linked with the filter assembly through a transmission assembly; the filtering assembly comprises a filtering mechanism and a pumping and draining assembly which are arranged in an associated manner; the filtering mechanism is connected with the discharge hole; the pumping and draining assembly is connected with a liquid distributing pipe through a liquid inlet hose, and the liquid distributing pipe is communicated with a liquid draining opening formed in the bottom of the liquid storage tank. The filter provided by the invention can be used for efficiently filtering paint.

Description

Technical Field

[0001] The present invention belongs to the technical field of paint production equipment, and particularly relates to a filter element type paint anti-sand filter. Background Art

[0002] Paint is a viscous oily pigment, usually used to cover the surface of an object for protection, decoration, marking and other special purposes; in the production process of paint, it is necessary to pass the paint through a filtering device under pressure to remove impurities therein, so a paint filter is required. The existing paint filter includes a tank for containing paint, an oil inlet is provided at the upper part of the tank, and an oil outlet is provided at the lower part of the tank. A filter screen is arranged between the oil inlet and the oil outlet. The paint is filtered through the filter screen under the action of pressure and its own weight. This kind of filter has the problems that the filter screen is easily blocked due to the thick and viscous nature of the paint, resulting in low filtration efficiency.

[0003] Therefore, a new filter element type paint anti-sand filter is needed to solve the above problems. Summary of the Invention

[0004] In order to overcome the above technical problems, the present invention provides a filter element type paint anti-sand filter, and the specific scheme is as follows: A filter element type paint anti-sand filter includes a storage tank. A plurality of support legs are provided at the bottom of the storage tank. A feeding port is provided at the upper part of the side wall of the storage tank, a plurality of discharge ports are provided along the circumferential direction at the lower part of the side wall, and a discharge port is provided at the bottom. An electric control valve is provided at the discharge port, and a sealing cover is provided at the discharge port. A driving motor is provided at the top of the storage tank. The power output end of the driving motor is connected to the input end of a speed reducer, and a driving gear is provided at the output end of the speed reducer; a support frame is provided at the top of the storage tank corresponding to each discharge port. A rotating shaft is rotatably provided on the support frame. One end of the rotating shaft is provided with a driven gear meshing with the driving gear, and the other end of the rotating shaft is linked with a filtering component through a transmission component; the filtering component includes a filtering mechanism and a pumping and discharging component which are associated with each other; the filtering mechanism is connected to the discharge port; the pumping and discharging component is connected to a liquid distribution pipe through a liquid inlet hose, and the liquid distribution pipe is communicated with a liquid discharge port provided at the bottom of a liquid storage tank, and the liquid storage tank stores cleaning liquid; the driving motor and the electric control valve are both electrically connected to a controller.

[0005] Based on the above, the filtering mechanism includes a filtering tank. An exhaust hole is provided at the top of the filtering tank, and a feeding port is provided at the bottom of the filtering tank. A solenoid valve one and a check valve one are provided at the feeding port. A bypass slag discharge port is provided at the feeding port, and a solenoid valve two and a check valve two are provided at the slag discharge port. A draw - out type filter element is provided inside the filtering tank. A feeding port that is connected in sequence with the discharge port is provided on the side wall of the filtering tank, and a check valve three is provided at the feeding port. A lifting assembly is provided inside the filtering tank. The lifting assembly includes a lifting plate. A lifting rod that slides through the top of the filtering tank is provided at the top of the lifting plate. The bottom of the lifting plate is connected to a mounting plate through a plurality of elastic support rods. A lifting housing is provided at the bottom of the mounting plate. A rubber sheet that fits the filtering tank is provided on the side wall of the lifting housing. An elastic contact switch one is provided at the top of the lifting plate. The transmission assembly includes a turntable fixed on the rotating shaft. A travel groove is provided on the turntable. A connecting shaft that penetrates through the travel groove is also provided on the turntable. A baffle for the turntable is provided on the connecting shaft. A positioning nut for fixing it to the turntable is also screwed on the connecting shaft. One end of the connecting shaft is rotatably connected to a connecting plate, and a pin shaft is provided at the other end of the connecting plate. The top end of the lifting rod is rotatably connected to the pin shaft. The solenoid valve one, the solenoid valve two, and the elastic contact switch one are all electrically connected to the controller.

[0006] Based on the above, the pumping and discharging assembly includes an over - tank fixed outside the filtering tank. A ventilation hole is provided at the top of the over - tank. A liquid inlet and a liquid outlet are provided at the bottom of the over - tank. A piston plate is slidably provided inside the over - tank. A piston rod that slides through the top of the over - tank is provided at the top of the piston plate. A metal block is provided at the top end of the piston rod. A groove is provided at the top of the metal block. An elastic contact switch two is provided in the groove. An n - shaped connecting rod is provided above the metal block. One end of the connecting rod is connected to the lifting plate, and an electromagnet for the metal block is provided at the other end of the connecting rod. A gas supplement port is provided on the side wall of the filtering tank, and a solenoid valve three is provided at the gas supplement port. A cavity for storing a solvent is provided inside the lifting housing. A filling port is provided at the top of the lifting housing. Liquid spraying ports are evenly distributed at the bottom of the lifting housing. A solenoid valve four is provided at the filling port. The filling port is connected to the liquid outlet through a liquid outlet hose. The electromagnet, the solenoid valve three, and the solenoid valve four are all electrically connected to the controller.

[0007] Based on the above, the filter element includes a frame. A filter screen is provided inside the perimeter of the frame. A handle is provided outside the frame. Guide rails are provided on both the left and right sides of the frame. Guide grooves corresponding to the guide rails are provided inside the filtering tank.

[0008] Based on the above, a heating plate for heating the filter element is also provided inside the filtering tank.

[0009] Based on the above, a rotating rod is provided through and rotatably corresponding to each of the rotating shafts at the top of the storage tank. The top end of the rotating rod is drivingly connected to the rotating shaft through a gear transmission structure. A spiral stirring blade and a plurality of stirring rods are provided on the rotating rod located inside the storage tank.

[0010] Based on the above, the slag discharge port is connected to one end of the slag discharge pipe, and the other end of the slag discharge pipe extends into the collection box.

[0011] Based on the above, a support spring for the metal block is sleeved outside the piston rod.

[0012] Based on the above, a liquid level sensor electrically connected to the controller is provided inside the liquid storage tank.

[0013] The present invention has prominent substantive features and significant progress compared with the prior art. Specifically, the present invention has the following advantages: The filter element type paint anti-sand filter provided by the present invention can stir and mix the paint and then perform filtration treatment. During the filtration process, when the filter element is blocked, it can automatically stop the filtration work on the material, and at the same time heat the filter element and then spray and clean it to discharge the paint and impurities in the filter element, realizing the purification treatment of the filter element, so as to facilitate the subsequent filtration efficiency of the paint, and has the technical advantages of ingenious structure design, practicality and high automation degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 is Figure 1 the schematic diagram of the structure at A in

[0016] Figure 3 is a schematic diagram of the structure of the filtration component in the present invention.

[0017] Figure 4 is a schematic diagram of the structure of the filter element in the present invention.

[0018] Figure 5 is a schematic diagram of the local cooperation structure of the present invention.

[0019] Figure 6 is a schematic diagram of the local cooperation structure of the present invention.

[0020] In the figure: 1. Storage tank; 1-1. Discharge port; 2. Support leg; 3. Feeding port; 4. Discharge port; 5. Driving motor; 6. Reducer; 7. Support frame; 8. Rotating shaft; 9. Driven gear; 10. Driving gear; 11. Rotating rod; 12. Turntable; 12-1. Travel groove; 13. Connecting plate; 14. Connecting shaft; 15. Lock nut; 16. Pin shaft; 18. Filter assembly; 18-1. Filter tank; 18-2. Lifting housing; 18-3. Cavity; 18-4. Liquid spraying port; 18-5. Elastic contact switch I; 18-6. Lifting plate; 18-7. Elastic support rod; 18-8. Mounting plate; 18-9. Lifting rod; 18-10. Air supply port; 18-11. Feed port; 18-12. Filter element; 18-12-1. Frame; 18-12-2. Handle; 18-12-3. Filter screen; 18-12-4. Guide rail; 18-13. Heating plate; 18-14. Discharge opening; 18-15. Slag discharge port; 18-17. Transition tank; 18-18. Liquid outlet; 18-19. Liquid inlet; 18-20. Liquid outlet hose; 18-22. Piston plate; 18-23. Piston rod; 18-24. Metal block; 18-25. Support spring; 18-26. Connecting rod; 18-27. Electromagnet; 18-28. Filling port; 20. Gear transmission structure; 21. Spiral stirring blade; 22. Stirring rod; 23. Liquid discharge port; 24. Liquid separation pipe; 25. Liquid storage tank; 26. Collection box; 27. Liquid inlet hose; 28. Slag discharge pipe; 29. Controller; 30. Liquid level sensor; 31. Storage box. Detailed implementation manners

[0021] The technical solutions of the present invention will be further described in detail below through specific implementation manners. Embodiment

[0022] As Figures 1-6As shown in the figure, the present invention provides a filter cartridge type paint anti-sand filter, which includes a storage tank 1. A plurality of support legs 2 are provided at the bottom of the storage tank 1. An inlet 3 is provided at the upper part of the side wall of the storage tank 1, a plurality of discharge ports 1-1 are provided along the circumferential direction at the lower part of the side wall, and a discharge port 4 is provided at the bottom. An electric control valve is provided at the discharge port 1-1, and a sealing cover is provided at the discharge port 4. A driving motor 5 is provided at the top of the storage tank 1. The power output end of the driving motor 5 is connected to the input end of a reducer 6, and a driving gear 10 is provided at the output end of the reducer 6. A support frame 7 is provided at the top of the storage tank 1 corresponding to each discharge port 1-1. A rotating shaft 8 is rotatably provided on the support frame 7. One end of the rotating shaft 8 is provided with a driven gear 9 meshing with the driving gear 10, and the other end of the rotating shaft 8 is linked with a filtering assembly 18 through a transmission assembly. The filtering assembly 18 includes a filtering mechanism and a pumping and discharging assembly which are associated with each other. The filtering mechanism is connected to the discharge port 1-1. The pumping and discharging assembly is connected to a liquid distribution pipe 24 through a liquid inlet hose 27, and the liquid distribution pipe 24 is communicated with a liquid discharge port 23 provided at the bottom of a liquid storage tank 25. The liquid storage tank 25 stores a cleaning liquid. The driving motor 5 and the electric control valve are both electrically connected to a controller 29.

[0023] The above-mentioned filtering mechanism is used to filter paint to remove impurities such as undissolved sand grains inside. It includes a filter tank 18-1. An exhaust hole is provided at the top of the filter tank 18-1, and a feeding port 18-14 is provided at the bottom of the filter tank 18-1. A solenoid valve one and a check valve one are provided at the feeding port 18-14. A bypass slag discharge port 18-15 is provided at the feeding port 18-14. A solenoid valve two and a check valve two are provided at the slag discharge port 18-15. A pull-out filter element is provided inside the filter tank 18-1. A feeding port 18-11 that is connected in sequence with the discharge port 1-1 is provided on the side wall of the filter tank 18-1. A check valve three is provided at the feeding port 18-11. A lifting assembly is provided inside the filter tank 18-1. The lifting assembly includes a lifting plate 18-6. A lifting rod 18-9 that slides through the top of the filter tank 18-1 is provided at the top of the lifting plate 18-6. The bottom of the lifting plate 18-6 is connected to a mounting plate 18-8 through a plurality of elastic support rods 18-7. A lifting housing 18-2 is provided at the bottom of the mounting plate 18-8. A rubber sheet that fits the filter tank 18-1 is provided on the side wall of the lifting housing 18-2. An elastic contact switch one 18-5 is provided at the top of the lifting plate 18-6. The transmission assembly includes a turntable 12 fixedly provided on the rotating shaft 8. A stroke groove 12-1 is provided on the turntable 12. A connecting shaft 14 that penetrates through the stroke groove 12-1 is further provided on the turntable 12. A baffle for the turntable 12 is provided on the connecting shaft 14. A positioning nut 15 for fixing it to the turntable 12 is further screwed on the connecting shaft 14. One end of the connecting shaft 14 is rotatably connected to a connecting plate 13. A pin shaft 16 is provided at the other end of the connecting plate 13. The top end of the lifting rod 18-9 is rotatably connected to the pin shaft 16. The solenoid valve one, the solenoid valve two, and the elastic contact switch one 18-5 are all electrically connected to the controller 29.

[0024] The above-mentioned exhaust and drainage assembly includes a transition tank 18-17 fixedly arranged outside the filter tank 18-1. The top of the transition tank 18-17 is provided with a vent hole, and the bottom of the transition tank 18-17 is provided with a liquid inlet 18-19 and a liquid outlet 18-18. A piston plate 18-22 is slidably arranged in the transition tank 18-17. The top of the piston plate 18-22 is provided with a piston rod 18-23 that slidably penetrates the top of the transition tank 18-17. The top of the piston rod 18-23 is provided with a metal block 18-24. The top of the metal block 18-24 is provided with a groove, and an elastic contact switch II is arranged in the groove. Above the metal block 18-24, there is an n-shaped connecting rod 18-26. One end of the connecting rod 18-26 is connected to the lifting plate 18-6, and the other end of the connecting rod 18-26 is provided with an electromagnet 18-27 for the metal block 18-24. A gas supplement port 18-10 is arranged on the side wall of the filter tank 18-1, and a solenoid valve III is arranged at the gas supplement port 18-10. A cavity 18-3 for storing solvent is arranged in the lifting housing 18-2. The top of the lifting housing 18-2 is provided with a filling port 18-28, and a solenoid valve IV is arranged at the filling port 18-28. Liquid spraying ports 18-4 are evenly arranged at the bottom of the lifting housing 18-2. The filling port 18-28 is connected to the liquid outlet 18-18 through a liquid outlet hose 18-20. The elastic contact switch II, the electromagnet 18-27, the solenoid valve III, and the solenoid valve IV are all electrically connected to the controller 29.

[0025] The above-mentioned filter element includes a frame 18-12-1. A filter screen 18-12-3 is arranged inside the periphery of the frame 18-12-1, and a handle 18-12-2 is arranged outside the frame 18-12-1. Guide rails 18-12-4 are arranged on both the left and right sides of the frame 18-12-1, and corresponding guide grooves are arranged in the filter tank 18-1.

[0026] Considering that the paint has a certain viscosity, in order to facilitate the timely and rapid discharge of impurities adhered to the filter element, a heating plate 18-13 for heating the filter element is further arranged in the above-mentioned filter tank 18-1.

[0027] To prevent the paint in the storage tank 1 from solidifying or being unevenly mixed, a rotating rod 11 is penetrated and rotatably arranged corresponding to each of the rotating shafts 8 at the top of the storage tank 1. The top of the rotating rod 11 is drivingly connected to the rotating shaft 8 through a gear transmission structure 20. A spiral stirring blade 21 and a plurality of stirring rods 22 are arranged on the rotating rod 11 located inside the storage tank 1.

[0028] To facilitate the discharge and collection of the paint and impurities cleaned from the filter screen 18-12-3, the above-mentioned slag discharge port 18-15 is connected to one end of a slag discharge pipe 28, and the other end of the slag discharge pipe 28 extends into the collection box 26.

[0029] To facilitate the limitation of the positions of the metal blocks 18-24, a support spring 18-25 for the metal blocks 18-24 is sleeved outside the piston rod 18-23. It should be noted that here the support spring 18-25 is only sleeved outside the piston rod 18-23, and both ends of the support spring 18-25 are not fixedly connected to the electromagnet 18-27 or the transition tank 18-17. When the support spring 18-25 naturally supports the metal block 18-24, the electromagnet 18-27 cannot touch the metal block 18-24 when it moves to the lowest position. The function of the support spring 18-25 here is to prevent the piston plate 18-22 from making rigid contact with the bottom of the transition tank 18-17.

[0030] To facilitate the monitoring of the remaining amount of the cleaning liquid in the liquid storage tank 25, a liquid level sensor 30 electrically connected to the controller 29 is provided in the liquid storage tank 25.

[0031] The specific working principle of the present invention is as follows: First, the rotation speed of the driving motor 5 and the low-level warning value of the liquid level sensor 30 are set through the controller 29. In the initial state, the controller 29 opens the electric control valve and the solenoid valve I, closes the solenoid valve II, the solenoid valve III, and the solenoid valve IV, and then starts the driving motor 5. The power output end of the driving motor 5 drives the driving gear 10 to rotate after being decelerated by the speed reducer 6. The driving gear 10 drives the driven gear 9 to rotate, thereby causing the rotating shaft 8 to rotate. The rotating shaft 8 drives the rotating rod 11 to rotate through the gear transmission structure 20. When the rotating rod 11 rotates, it drives the stirring rod 22 and the spiral stirring blade 21 to rotate to stir and mix the materials in the storage tank 1.

[0032] When the rotating shaft 8 rotates, it drives the lifting rod 18-9 to move up and down through the transmission assembly, and then causes the lifting assembly to move up and down. When the lifting assembly moves upward, the materials in the storage tank 1 are extracted into the filter tank 18-1. When the lifting assembly moves downward, the materials in the filter tank 18-1 are squeezed downward, and the materials pass through the filter screen 18-12-3 and are discharged from the discharge port 4 into the storage tank 31.

[0033] When the filter screen 18-12-3 is blocked, when the lifting assembly moves downward, the lifting plate 18-6 will touch the elastic contact switch I 18-5 due to excessive extrusion of the elastic support rod 18-7. At this time, the controller 29 first starts the electromagnet 18-27. When the lifting assembly moves to the lowest position, the electromagnet 18-27 adsorbs to the metal block 18-24, and at the same time, the elastic contact switch II on the metal block 18-24 is touched. Immediately, the controller 29 closes the electric control valve and the solenoid valve I, opens the solenoid valve II, the solenoid valve III, and the solenoid valve IV, and starts the heating plate 18-13 to heat up the filter element.

[0034] At this time, when the lifting assembly moves upward, the cleaning agent in the liquid storage tank 25 is slowly sucked into the overflow tank 18-17. When the lifting assembly moves downward, the cleaning agent in the overflow tank 18-17 is squeezed through the liquid outlet hose 18-20 into the cavity 18-3 in the lifting housing 18-2, and is sprayed out from the liquid spraying port 18-4 onto the filter element to clean the paint and impurities on the filter element. The waste generated by the cleaning is discharged from the slag discharge port 18-15, enters the collection tank 26 through the slag discharge pipe 28. Rinse the filter element 3-5 times repeatedly in this way. The controller 29 opens the solenoid valve and solenoid valve 1, closes solenoid valve 2, solenoid valve 3, and solenoid valve 4, and at the same time closes the heating plate 18-13 and cuts off the power supply to the electromagnet 18-27.

[0035] When the liquid level sensor 30 is lower than the warning value, the controller 29 issues an alarm to remind the staff to fill the liquid storage tank 25 with the cleaning liquid.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A filter element type paint sand prevention filter, characterized in that: It includes a storage tank (1), multiple support legs (2) are provided at the bottom of the storage tank (1), a feeding port (3) is provided at the upper part of the side wall of the storage tank (1), multiple discharge ports (1-1) are provided along the circumference at the lower part of the side wall, a discharge port (4) is provided at the bottom, an electric control valve is provided at the discharge port (1-1), a sealing cover is provided at the discharge port (4), a driving motor (5) is provided at the top of the storage tank (1), the power output end of the driving motor (5) is connected to the input end of a speed reducer (6), and a driving gear (10) is provided at the output end of the speed reducer (6); a support frame (7) is provided at the top of the storage tank (1) corresponding to each discharge port (1-1), a rotating shaft (8) is rotatably provided on the support frame (7), a driven gear (9) meshing with the driving gear (10) is provided at one end of the rotating shaft (8), and the other end of the rotating shaft (8) is linked with a filtering assembly (18) through a transmission assembly; the filtering assembly (18) includes a filtering mechanism and a pumping and discharging assembly which are associated; the filtering mechanism is connected to the discharge port (1-1); the pumping and discharging assembly is connected to a liquid separation pipe (24) through a liquid inlet hose (27), the liquid separation pipe (24) is communicated with a liquid discharge port (23) provided at the bottom of a liquid storage tank (25), and the liquid storage tank (25) stores a cleaning liquid; the driving motor (5) and the electric control valve are both electrically connected to a controller (29).

2. The filter cartridge type paint sand prevention filter according to claim 1, wherein: The filtering mechanism includes a filtering tank (18-1). An exhaust hole is provided at the top of the filtering tank (18-1), and a blanking port (18-14) is provided at the bottom of the filtering tank (18-1). A first solenoid valve and a first check valve are provided at the blanking port (18-14). A bypass slag discharge port (18-15) is provided at the blanking port (18-14). A second solenoid valve and a second check valve are provided at the slag discharge port (18-15). A drawable filter element is provided in the filtering tank (18-1). A feed port (18-11) connected in series with the discharge port (1-1) is provided on the side wall of the filtering tank (18-1). A third check valve is provided at the feed port (18-11). A lifting assembly is provided in the filtering tank (18-1). The lifting assembly includes a lifting plate (18-6). A lifting rod (18-9) that slides through the top of the filtering tank (18-1) is provided at the top of the lifting plate (18-6). The bottom of the lifting plate (18-6) is connected to a mounting plate (18-8) through a plurality of elastic support rods (18-7). A lifting housing (18-2) is provided at the bottom of the mounting plate (18-8). A rubber sheet that fits the filtering tank (18-1) is provided on the side wall of the lifting housing (18-2). A first elastic contact switch (18-5) is provided at the top of the lifting plate (18-6). The transmission assembly includes a turntable (12) fixed on the rotating shaft (8). A travel groove (12-1) is provided on the turntable (12). A connecting shaft (14) that penetrates through the travel groove (12-1) is further provided on the turntable (12). A baffle for the turntable (12) is provided on the connecting shaft (14). A positioning nut (15) for fixing it to the turntable (12) is also screwed on the connecting shaft (14). The connecting shaft (14) is rotatably connected to one end of a connecting plate (13). A pin shaft (16) is provided at the other end of the connecting plate (13). The top end of the lifting rod (18-9) is rotatably connected to the pin shaft (16). The first solenoid valve, the second solenoid valve, and the first elastic contact switch (18-5) are all electrically connected to the controller (29).

3. The filter cartridge type paint sand prevention filter according to claim 2, characterized in that: The extraction and drainage assembly includes an excessive tank (18-17) fixedly arranged outside the filter tank (18-1). The top of the excessive tank (18-17) is provided with a ventilation hole, the bottom of the excessive tank (18-17) is provided with a liquid inlet (18-19) and a liquid outlet (18-18). A piston plate (18-22) is slidably arranged in the excessive tank (18-17). The top of the piston plate (18-22) is provided with a piston rod (18-23) that slidably penetrates the top of the excessive tank (18-17). The top of the piston rod (18-23) is provided with a metal block (18-24). The top of the metal block (18-24) is provided with a groove, and an elastic contact switch II is arranged in the groove. Above the metal block (18-24), there is an n-shaped connecting rod (18-26). One end of the connecting rod (18-26) is connected to the lifting plate (18-6), and the other end of the connecting rod (18-26) is provided with an electromagnet (18-27) for the metal block (18-24). A gas supplement port (18-10) is arranged on the side wall of the filter tank (18-1), and a solenoid valve III is arranged at the gas supplement port (18-10). A cavity (18-3) for storing solvent is arranged in the lifting housing (18-2). The top of the lifting housing (18-2) is provided with a filling port (18-28), and a solenoid valve IV is arranged at the filling port (18-28). The bottom of the lifting housing (18-2) is evenly provided with liquid spraying ports (18-4). The filling port (18-28) is connected to the liquid outlet (18-18) through a liquid outlet hose (18-20). The electromagnet (18-27), the solenoid valve III, and the solenoid valve IV are all electrically connected to the controller (29).

4. The filter element type paint sand prevention filter according to claim 2, characterized in that: The filter element includes a frame (18-12-1). A filter screen (18-12-3) is arranged inside the periphery of the frame (18-12-1), and a handle (18-12-2) is arranged outside the frame (18-12-1). Guide rails (18-12-4) are arranged on the left and right sides of the frame (18-12-1). Corresponding guide grooves are arranged in the filter tank (18-1) for the guide rails (18-12-4).

5. The filter element type paint sand prevention filter according to claim 4, wherein: A heating plate (18-13) for heating the filter element is further arranged in the filter tank (18-1).

6. The filter element type paint sand prevention filter according to claim 1, wherein: At the top of the storage tank (1), a rotating rod (11) penetrates and rotates corresponding to each of the rotating shafts (8). The top of the rotating rod (11) is drivingly connected to the rotating shaft (8) through a gear transmission structure (20). A spiral stirring blade (21) and a plurality of stirring rods (22) are arranged on the rotating rod (11) located inside the storage tank (1).

7. The filter element type paint sand prevention filter according to claim 2, characterized in that: The slag discharge port (18-15) is connected to one end of a slag discharge pipe (28), and the other end of the slag discharge pipe (28) extends into the collection box (26).

8. The filter element type paint sand prevention filter according to claim 3, characterized in that: A support spring (18-25) for the metal block (18-24) is sleeved outside the piston rod (18-23).

9. The filter cartridge type paint sand prevention filter according to claim 1, characterized in that: A liquid level sensor (30) electrically connected to the controller (29) is arranged in the liquid storage tank (25).

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