Impurity filtering device for seabed coating processing and filtering method

Abstract

The invention discloses an impurity filtering device for seabed coating processing and a filtering method. The impurity filtering device comprises a filtering tank, and two conical filter screens used for filtering impurities in seabed coating are fixed in the filtering tank; the mesh hole cleaning assembly is arranged in the filtering tank, and the mesh hole cleaning assembly comprises an ejection piece used for cleaning particle impurities clamped in mesh holes of the conical filter screen; the ejection piece comprises a high-pressure air pump, a hollow air conveying pipe and two exhaust pipes, and a plurality of air outlet grooves are formed in the upper portions of the two exhaust pipes. Gas is fed into a hollow gas conveying pipe and two exhaust pipes through a high-pressure gas pump, under the blowing force of the high-pressure gas, a gravity magnetic block is ejected upwards, the gravity magnetic block is separated from a magnetic supporting ring, a concave opening sealing plate and a convex opening sealing plate are opened through two thrust rods, and the gravity magnetic block is separated from the magnetic supporting ring; and the high-pressure gas blows particles clamped by the meshes of the conical filter screen from bottom to top to be above the conical filter screen, so that the particles can be conveniently cleaned by the cleaning roller, and the meshes of the conical filter screen can be thoroughly cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of seabed coating filtration, and in particular to an impurity filtering device and a filtering method for seabed coating processing. Background Art

[0002] Submarine paint is a special paint used to protect submarine structures and equipment. Submarine structures include submarine pipelines, offshore oil platforms, submarine cables, etc. These structures need to prevent erosion and damage from seawater, marine life, corrosion and other factors. Submarine paint usually has the characteristics of corrosion resistance, resistance to marine life attachment, high pressure resistance and agitation resistance. Submarine paint usually adopts special formula and coating process to ensure that it has good protection effect and durability in the submarine environment. Various particulate impurities may appear in the processing of marine paint. These impurities may affect the quality and performance of the paint. Therefore, it is necessary to remove these particulate impurities through filtering and other methods to ensure the quality and performance of the paint.

[0003] After searching, a filter device for processing anti-corrosion paint for ships in marine atmosphere with publication number CN214808813U is disclosed, comprising a filter tank, a support frame is fixedly connected to the top of the filter tank, a first filter screen is arranged inside the support frame, and a second filter screen is arranged at the bottom of the first filter screen. The utility model can scrape the top of the first filter screen and the second filter screen by setting an anti-blocking mechanism to prevent impurities from being adsorbed on the top of the first filter screen and the second filter screen to block the first filter screen and the second filter screen, thereby achieving the effect of preventing the filter screen from being blocked, solving the problem that the existing filter device for processing anti-corrosion paint for ships in marine atmosphere cannot prevent the filter screen from being blocked. The filter device for processing anti-corrosion paint for ships in marine atmosphere has the advantage of preventing the filter screen from being blocked, and the filter screen will not be blocked when the user uses it, thereby ensuring the filtering efficiency of the filter screen.

[0004] When marine paint filters impurities, some particles with sizes almost the same as the filter mesh will get stuck in the mesh. The anti-blocking mechanism in the disclosed patent can only scrape the surface of the filter to clear the impurity particles remaining on the surface of the filter out of the filter tank. The particles stuck in the mesh will still block some of the mesh. The filter mesh is not cleaned thoroughly enough to completely prevent the filter from being blocked. Summary of the invention

[0005] The purpose of the present invention is to provide an impurity filtering device and a filtering method for seabed paint processing, which solves the problem that the anti-blocking mechanism in the traditional filtering device can only clear the impurity particles remaining on the surface of the filter screen out of the filter tank, and the particles stuck in the mesh will still block some of the mesh holes, and the filter screen mesh holes are not cleaned thoroughly enough to completely prevent the filter screen from being blocked.

[0006] The present invention solves the above technical problems through the following technical solutions. The present invention comprises a filter tank, wherein two conical filter screens for filtering impurities inside the seabed coating are fixed inside the filter tank;

[0007] A mesh cleaning component, the mesh cleaning component is arranged inside the filter tank, and the mesh cleaning component includes a ejector for removing particulate impurities stuck in the mesh of the conical filter;

[0008] The ejection member includes a high-pressure air pump, a hollow air pipe and two exhaust pipes, a plurality of air outlet grooves are provided on the top of the two exhaust pipes, the high-pressure air pump is rotatably installed on the top of the filter tank, the hollow air pipe is rotated inside the filter tank, and the hollow air pipe passes through the two conical filter screens in sequence, and the air outlet end of the high-pressure air pump is connected to one end of the hollow air pipe, one end of the two exhaust pipes is connected to the hollow air pipe, and the two exhaust pipes are respectively located below the two conical filter screens, and the two cleaning rollers are fixed to the outside of the hollow air pipe, and the two cleaning rollers are respectively located above the two conical filter screens.

[0009] Preferably, a plurality of limiting slide grooves are provided above the two exhaust pipes, and the plurality of limiting slide grooves are respectively connected to the plurality of air outlet grooves, a plurality of vertical grooves are provided on the inner surfaces of the plurality of air outlet grooves, and the mesh cleaning assembly also includes a plurality of one-way opening parts for preventing the air outlet grooves from being blocked by paint.

[0010] Preferably, the one-way opening member includes a gravity magnetic block, a magnetic support ring, two thrust rods, a recessed closing plate and a protruding closing plate, the gravity magnetic block is arranged inside the air outlet groove, and the gravity magnetic block slides inside the multiple vertical grooves through multiple support arms, the magnetic support ring is fixed inside the air outlet groove, one end of the two thrust rods are rotated above the gravity magnetic block, and the other ends of the two thrust rods are respectively rotated below the recessed closing plate and the protruding closing plate, and the recessed closing plate and the protruding closing plate both slide inside the limiting slide groove.

[0011] Preferably, the mesh cleaning assembly also includes a driving member for driving the ejector to rotate below the conical filter, the driving member includes a hollow shell, a motor, gear one and gear two, the hollow shell is fixed above the filter tank, the motor is fixed to the inside of the hollow shell through a fixing frame, the gear one is fixed to one end of the motor output shaft, the gear two is fixed below the high-pressure air pump, and the gear one is meshed with the gear two.

[0012] Preferably, two slag discharge holes are opened on one side of the filter tank, inner grooves are opened above the inner walls of the two slag discharge holes, closing plates are slid inside the two inner grooves, L-shaped plates are fixed below the two closing plates, and the two L-shaped plates slide inside the two slag discharge holes respectively.

[0013] Preferably, the two L-shaped plates are both made of rubber.

[0014] Preferably, outer grooves are provided at the bottoms of the inner walls of the two slag discharge holes, and traction buckets are fixed below the two L-shaped plates.

[0015] Preferably, two upper screw holes are provided on one side of the filter tank, and a screw rod 1 is threadedly installed on one side of the two L-shaped plates through a fixing plate.

[0016] Preferably, lower screw holes are provided inside the two outer grooves, and screw rod 2 is threadedly installed on one side of the two L-shaped plates through a connecting piece.

[0017] A method for filtering impurities for seabed coating processing comprises the following steps:

[0018] Step 1: The seabed paint enters the filter tank through the feed pipe, and passes through two conical filters in turn to filter and intercept the particulate impurities inside the seabed paint. The clean seabed paint that has filtered out the particulate impurities will be discharged from the filter tank through the discharge pipe;

[0019] Step 2: Unscrew the screw rod 2 out of the lower screw hole, pull the L-shaped plate upward, and the L-shaped plate pulls the upper surface of the traction bucket to the bottom of the inner wall of the slag discharge hole and splices it, until the upper part of the closing plate moves to the top of the inner wall of the inner groove. At this time, the screw rod 1 corresponds to the upper screw hole, and the screw rod 1 is screwed into the upper screw hole to fix the position of the L-shaped plate, exposing the slag discharge hole 4;

[0020] Step 3: Use a high-pressure air pump to send gas into the hollow gas pipe and two exhaust pipes. The high-pressure gas pushes the gravity magnetic block upward. The gravity magnetic block uses two thrust rods to open the concave closing plate and the convex closing plate. The high-pressure gas blows the particles stuck in the mesh of the conical filter from bottom to top of the conical filter.

[0021] Step 4: The motor drives the high-pressure air pump and the hollow air pipe to rotate through gears 1 and 2. The hollow air pipe will drive the two exhaust pipes and two cleaning rollers to rotate on the upper and lower surfaces of the conical filter. The exhaust pipe will fully blow out the particles stuck in the mesh of the conical filter, and the cleaning roller will sweep the blown particles to the slag discharge hole and discharge them from the filter tank.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. Use a high-pressure air pump to deliver gas into the hollow gas pipe and two exhaust pipes. Under the blowing force of the high-pressure gas, the gravity magnetic block is pushed upward, the gravity magnetic block and the magnetic support ring are separated, and the concave closing plate and the convex closing plate are opened through two thrust rods. The high-pressure gas blows the particles stuck in the conical filter mesh from bottom to top of the conical filter, which is convenient for the cleaning roller to remove and helps to thoroughly clean the conical filter mesh.

[0024] 2. After the high-pressure air pump stops delivering air, the gravity magnetic block falls into the magnetic support ring due to its own gravity, and two thrust rods are used to close the concave closing plate and the convex closing plate to prevent the seabed paint from entering the air outlet groove and affecting the subsequent high-pressure gas blowing out to clean the conical filter mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the wiring storage assembly of the present invention;

[0026] Figure 2 It is a partial cross-sectional view of the present invention;

[0027] Figure 3 A partial cross-sectional view of the ejector and the cleaning roller in the present invention;

[0028] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0029] Figure 5 It is a partial schematic diagram of the exhaust pipe of the present invention when the air outlet slot is opened;

[0030] Figure 6 It is a split cross-sectional view of the present invention;

[0031] Figure 7 for Figure 6 The enlarged structural diagram at B in the middle;

[0032] Figure 8 for Figure 6 Enlarged structural diagram at point C in the middle.

[0033] The numbers in the figure represent:

[0034] 1. Filter tank; 2. Conical filter;

[0035] 3. Mesh cleaning assembly; 31. High-pressure air pump; 32. Hollow air pipe; 33. Exhaust pipe; 34. Air outlet slot; 35. Limiting slide slot; 36. Vertical slot; 37. Gravity magnetic block; 38. Magnetic support ring; 39. Thrust rod; 310. Notch closing plate; 311. Protrusion closing plate; 312. Hollow shell; 313. Motor; 314. Gear 1; 315. Gear 2;

[0036] 4. Slag discharge hole; 5. Inner trough; 6. Closing plate; 7. L-shaped plate; 8. Outer trough; 9. Traction bucket; 10. Upper screw hole; 11. Screw rod one; 12. Lower screw hole; 13. Screw rod two; 14. Cleaning roller. DETAILED DESCRIPTION

[0037] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0038] The present invention provides a technical solution: an impurity filtering device and a filtering method for seabed coating processing, such as Figure 1 and Figure 2 As shown, it includes a filter tank 1, two cleaning rollers 14 and a mesh cleaning component 3. Two conical filter screens 2 for filtering impurities inside the seabed paint are fixed inside the filter tank 1. The two conical filter screens 2 are distributed up and down, and the mesh of the upper conical filter screen 2 is larger than the mesh of the lower conical filter screen 2. The number of conical filter screens 2 can be set to 3 or 4. The specific number depends on different needs. Two are taken as an example in the figure. The mesh cleaning component 3 is arranged inside the filter tank 1. The mesh cleaning component 3 includes an ejector for removing particle impurities stuck in the mesh of the conical filter screen 2. The particles stuck in the mesh of the conical filter screen 2 cannot be swept away by the cleaning roller 14. The ejector can apply an upward blowing force from the bottom to blow the particles out of the mesh, so that the cleaning roller 14 can completely sweep away the particles.

[0039] like Figure 1 and Figure 2 As shown, a feed pipe is provided above the filter tank 1, and a discharge pipe is provided below the filter tank 1. The seabed paint enters the filter tank 1 through the feed pipe, and passes through two conical filter screens 2 in sequence to filter and intercept particulate impurities inside the seabed paint. The clean seabed paint that has filtered out the particulate impurities will be discharged from the filter tank 1 through the discharge pipe.

[0040] like Figure 2-4As shown, the ejector includes a high-pressure air pump 31, a hollow air pipe 32 and two exhaust pipes 33. The number of exhaust pipes 33 and the number of cleaning rollers 14 depend on the number of conical filter screens 2. A plurality of air outlet grooves 34 are provided above the two exhaust pipes 33. The high-pressure air pump 31 is rotatably installed above the filter tank 1. The hollow air pipe 32 is rotated inside the filter tank 1. The hollow air pipe 32 passes through the two conical filter screens 2 in sequence. The penetration is rotatably connected, and the air outlet end of the high-pressure air pump 31 is connected to one end of the hollow air pipe 32. The air outlet end of the high-pressure air pump 31 extends to the outside of the hollow shell 312 to facilitate the intake of air. One end of the two exhaust pipes 33 is connected to the hollow air supply pipe 32, and the two exhaust pipes 33 are respectively located below the two conical filter screens 2. The two cleaning rollers 14 are fixed to the outside of the hollow air supply pipe 32, and the two cleaning rollers 14 are respectively located above the two conical filter screens 2. The cleaning rollers 14 above the same conical filter screen 2 and the exhaust pipes 33 below are staggered to prevent the gas from being obstructed by the cleaning rollers 14 when blowing out, affecting the effect of cleaning the mesh.

[0041] like Figure 2-4 As shown, a plurality of limiting slide grooves 35 are provided above the two exhaust pipes 33, and the plurality of limiting slide grooves 35 are respectively connected to the plurality of air outlet grooves 34, and a plurality of vertical grooves 36 are provided on the inner surfaces of the plurality of air outlet grooves 34, and the number of the vertical grooves 36 is at least two groups, and the vertical grooves 36 are mainly used to limit the sliding track of the traction gravity magnetic block 37, and the mesh cleaning component 3 also includes a plurality of one-way openings for preventing the air outlet groove 34 from being blocked by paint. When the seabed paint is filtered, the one-way openings are in a closed state to prevent the seabed paint from passing through the conical filter screen 2 and entering the air outlet groove 34 to affect the later high-pressure gas blowing, and the one-way openings include a gravity magnetic block 37, a magnetic support ring 38, two thrust rods 39, a concave closing plate 310 and a convex closing plate 311, and the gravity magnetic block 37 is arranged inside the air outlet groove 34, and the gravity magnetic block 37 Through multiple support arms sliding inside multiple vertical slots 36, the magnetic support ring 38 is fixed inside the air outlet slot 34, and the gravity magnetic block 37 falls into the magnetic support ring 38 by gravity. The gravity magnetic block 37 is positively magnetic, and the magnetic support ring 38 is negatively magnetic. The gravity magnetic block 37 is further limited by the magnetic attraction between the two to ensure that the recessed closing plate 310 and the convex closing plate 311 are closed and fastened. One end of the two thrust rods 39 are rotated above the gravity magnetic block 37, and the other ends of the two thrust rods 39 are respectively rotated below the recessed closing plate 310 and the convex closing plate 311. The recessed closing plate 310 and the convex closing plate 311 both slide inside the limiting slide slot 35. When the convex closing plate 311 and the recessed closing plate 310 are closed, the opposite sides of the two are engaged to tightly close the air outlet slot 34.

[0042] like Figure 2-4As shown, when cleaning the conical filter 2, the particle impurities stuck in the mesh of the conical filter 2 can be sent into the hollow gas pipe 32 by the high-pressure air pump 31, and the gas is blown into the two exhaust pipes 33. Under the blowing force of the high-pressure gas, the gravity magnetic block 37 is pushed upward, and the gravity magnetic block 37 and the magnetic support ring 38 are separated. When moving upward, the ends of the two thrust rods 39 connected to it are pushed upward, and the other ends of the two thrust rods 39 move and deflect in opposite directions, respectively, so as to close the notch closure plate 3 10 and the convex closing plate 311 are opened, and the high-pressure gas will blow toward the conical filter 2 through the open position, and the particles stuck in the mesh of the conical filter 2 will be blown out from the bottom to the top. After being blown out of the mesh, the particles fall on the top of the conical filter 2, waiting for the cleaning roller 14 to be pushed to the slag discharge hole 4 to be discharged from the filter tank 1. After the cleaning is completed, the high-pressure air pump 31 stops supplying air, and the gravity magnetic block 37 falls into the magnetic support ring 38 under its own gravity, and the two thrust rods 39 are used to close the concave closing plate 310 and the convex closing plate 311.

[0043] like Figure 2-7 As shown, the mesh cleaning assembly 3 also includes a driving member for driving the ejector to rotate below the conical filter 2, and the driving member includes a hollow shell 312, a motor 313, a gear 1 314 and a gear 2 315. The hollow shell 312 is fixed above the filter tank 1, and is used to hide the motor 313, the gear 1 314, the gear 2 315 and the high-pressure air pump 31 to increase the aesthetics. The motor 313 is fixed to the inside of the hollow shell 312 through a fixing frame, the gear 1 314 is fixed to one end of the output shaft of the motor 313, the gear 2 315 is fixed to the bottom of the high-pressure air pump 31, the gear 1 314 is meshed with the gear 2 315, and the gear 1 314 and the gear 2 315 are meshed to realize the transmission effect.

[0044] like Figure 2-8 As shown, the motor 313 drives the gear 1 314 connected thereto to rotate, and the gear 1 314 drives the high-pressure air pump 31 and the hollow air pipe 32 to rotate through the meshing gear 2 315, and the hollow air pipe 32 will drive the two exhaust pipes 33 and the two cleaning rollers 14 to rotate on the upper and lower surfaces of the conical filter 2, and the exhaust pipes 33 will fully blow out the particles stuck in the mesh of the conical filter 2, and the cleaning rollers 14 will follow closely to sweep the blown particles to the slag discharge hole 4 to discharge them from the filter tank 1.

[0045] like Figure 1 , Figure 2 and Figure 8As shown, one side of the filter tank 1 is provided with two slag discharge holes 4, and the positions of the two slag discharge holes 4 correspond to the height and position of one side of the two conical filter screens 2, respectively. When the cleaning roller 14 pushes the particles to the slag discharge holes 4, it is convenient for the particles to slide out of the filter tank 1. The upper part of the inner wall of the two slag discharge holes 4 is provided with an inner groove 5, and the inside of the two inner grooves 5 is slid with a closing plate 6, and the lower part of the two closing plates 6 is fixed with an L-shaped plate 7, and the two L-shaped plates 7 slide inside the two slag discharge holes 4, respectively, and the two L-shaped plates 7 are made of rubber. When the seabed paint is filtered, the L-shaped plate 7 is closed at the slag discharge hole 4 to prevent the seabed paint from being discharged from the slag discharge hole 4. The bottom of the inner wall of the two slag discharge holes 4 is provided with an outer groove 8, and a traction bucket 9 is fixed below the two L-shaped plates 7. One side of the filter tank 1 is provided with two upper screw holes 10, and one side of the two L-shaped plates 7 is threadedly installed with a screw rod 11 through a fixing plate. The inside of the two outer grooves 8 is provided with a lower screw hole 12, and one side of the two L-shaped plates 7 is threadedly installed with a screw rod 2 13 through a connecting plate.

[0046] like Figure 1 , Figure 2 and Figure 8 As shown, when cleaning the conical filter 2, screw rod 13 is unscrewed out of the lower screw hole 12, and the L-shaped plate 7 is pulled upward until it moves above the closing plate 6 to the top of the inner wall of the inner groove 5. At this time, screw rod 11 corresponds to the upper screw hole 10, and the L-shaped plate 7 pulls the upper surface of the traction bucket 9 to the bottom of the inner wall of the slag discharge hole 4 and splices it with it. Screw rod 11 is screwed into the upper screw hole 10 to fix the position of the L-shaped plate 7, exposing the slag discharge hole 4, and when the cleaning roller 14 rotates following the hollow air pipe 32, the particles are pushed to the slag discharge hole 4, so that the particles are moved out of the filter tank 1.

[0047] A method for filtering impurities for seabed coating processing comprises the following steps:

[0048] Step 1: The seabed paint enters the filter tank 1 through the feed pipe, and passes through two conical filter screens 2 in sequence to filter and intercept the particulate impurities inside the seabed paint. The clean seabed paint that has filtered out the particulate impurities will be discharged from the filter tank 1 through the discharge pipe;

[0049] Step 2: Unscrew the second screw rod 13 out of the lower screw hole 12, pull the L-shaped plate 7 upward, and the L-shaped plate 7 pulls the upper surface of the traction bucket 9 to the bottom of the inner wall of the slag discharge hole 4 and splices it, until the upper part of the closing plate 6 moves to the top of the inner wall of the inner groove 5. At this time, the first screw rod 11 corresponds to the upper screw hole 10, and the first screw rod 11 is screwed into the upper screw hole 10 to fix the position of the L-shaped plate 7, so that the slag discharge hole 4 is exposed;

[0050] Step 3: Use the high-pressure air pump 31 to deliver gas into the hollow gas delivery pipe 32 and the two exhaust pipes 33. The high-pressure gas pushes the gravity magnetic block 37 upward. The gravity magnetic block 37 uses two thrust rods 39 to open the concave closing plate 310 and the convex closing plate 311. The high-pressure gas blows the particles stuck in the mesh of the conical filter 2 from bottom to top to the top of the conical filter 2.

[0051] Step 4: The motor 313 drives the high-pressure air pump 31 and the hollow air pipe 32 to rotate through the gear 1 314 and the gear 2 315. The hollow air pipe 32 will drive the two exhaust pipes 33 and the two cleaning rollers 14 to rotate on the upper and lower surfaces of the conical filter 2. The exhaust pipe 33 will fully blow out the particles stuck in the mesh of the conical filter 2, and the cleaning roller 14 will sweep the blown particles to the slag discharge hole 4 and discharge them from the filter tank 1.

[0052] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. An impurity filtering device for seabed coating processing, characterized in that: It comprises a filter tank (1) and two cleaning rollers (14), wherein two conical filter screens (2) for filtering impurities inside the seabed paint are fixed inside the filter tank (1); A mesh cleaning component (3), the mesh cleaning component (3) being arranged inside the filter tank (1), the mesh cleaning component (3) comprising a ejector for removing particulate impurities stuck in the mesh of the conical filter (3); The ejector comprises a high-pressure air pump (31), a hollow air pipe (32) and two exhaust pipes (33). A plurality of air outlet grooves (34) are provided above the two exhaust pipes (33). The high-pressure air pump (31) is rotatably mounted above the filter tank (1). The hollow air pipe (32) is rotated inside the filter tank (1). The hollow air pipe (32) sequentially passes through the two conical filter screens (2). The air outlet end of the high-pressure air pump (31) is connected to one end of the hollow air pipe (32). One ends of the two exhaust pipes (33) are connected to the hollow air pipe (32). The two exhaust pipes (33) are respectively located below the two conical filter screens (2). The two cleaning rollers (14) are fixed to the outside of the hollow air pipe (32). The two cleaning rollers (14) are respectively located above the two conical filter screens (2).

2. The impurity filtering device for seabed coating processing according to claim 1, characterized in that: A plurality of limiting slide grooves (35) are provided above the two exhaust pipes (33), and the plurality of limiting slide grooves (35) are respectively connected to the plurality of air outlet grooves (34), and a plurality of vertical grooves (36) are provided on the inner surfaces of the plurality of air outlet grooves (34). The mesh cleaning component (3) further comprises a plurality of one-way opening members for preventing the air outlet grooves (34) from being blocked by paint.

3. The impurity filtering device for seabed coating processing according to claim 2, characterized in that: The one-way opening member comprises a gravity magnetic block (37), a magnetic support ring (38), two thrust rods (39), a recessed closing plate (310) and a protruding closing plate (311); the gravity magnetic block (37) is arranged inside the air outlet groove (34), and the gravity magnetic block (37) slides inside the plurality of vertical grooves (36) through a plurality of support arms; the magnetic support ring (38) is fixed inside the air outlet groove (34); one end of the two thrust rods (39) rotates above the gravity magnetic block (37); the other ends of the two thrust rods (39) rotate respectively below the recessed closing plate (310) and the protruding closing plate (311); the recessed closing plate (310) and the protruding closing plate (311) slide inside the limiting sliding groove (35).

4. The impurity filtering device for seabed coating processing according to claim 3, characterized in that: The mesh cleaning assembly (3) further comprises a driving member for driving the ejector to rotate below the conical filter (2), the driving member comprising a hollow shell (312), a motor (313), a gear 1 (314) and a gear 2 (315), the hollow shell (312) being fixed above the filter tank (1), the motor (313) being fixed inside the hollow shell (312) via a fixing frame, the gear 1 (314) being fixed to one end of an output shaft of the motor (313), the gear 2 (315) being fixed below the high-pressure air pump (31), and the gear 1 (314) being meshed with the gear 2 (315).

5. The impurity filtering device for seabed coating processing according to claim 1, characterized in that: Two slag discharge holes (4) are provided on one side of the filter tank (1), inner grooves (5) are provided above the inner walls of the two slag discharge holes (4), closing plates (6) are slid inside the two inner grooves (5), L-shaped plates (7) are fixed below the two closing plates (6), and the two L-shaped plates (7) slide inside the two slag discharge holes (4) respectively.

6. The impurity filtering device for seabed coating processing according to claim 5, characterized in that: The two L-shaped plates (7) are both made of rubber.

7. The impurity filtering device for seabed coating processing according to claim 6, characterized in that: The bottoms of the inner walls of the two slag discharge holes (4) are both provided with outer grooves (8), and a traction bucket (9) is fixed below the two L-shaped plates (7).

8. The impurity filtering device for seabed coating processing according to claim 7, characterized in that: Two upper screw holes (10) are provided on one side of the filter tank (1), and screw rods (11) are threadedly mounted on one side of the two L-shaped plates (7) through fixing plates.

9. The impurity filtering device for seabed coating processing according to claim 8, characterized in that: The insides of the two outer grooves (8) are both provided with lower screw holes (12), and one side of the two L-shaped plates (7) is both threadedly mounted with screw rods (13) through connecting pieces.

10. A method for filtering impurities for seabed coating processing, characterized in that: The filtering method is applied to the filtering device according to any one of claims 4 and 9, comprising the following steps: Step 1: The seabed paint enters the filter tank (1) through the feed pipe, and passes through two conical filter screens (2) in sequence to filter and intercept the particulate impurities inside the seabed paint. The clean seabed paint from which the particulate impurities have been filtered out is discharged from the filter tank (1) through the discharge pipe; Step 2: Screw the second screw rod (13) out of the lower screw hole (12), pull the L-shaped plate (7) upward, and the L-shaped plate (7) pulls the upper surface of the traction bucket (9) to the bottom of the inner wall of the slag discharge hole (4) and splices it until the upper part of the closing plate (6) moves to the top of the inner wall of the inner groove (5). At this time, the first screw rod (11) and the upper screw hole (10) correspond to each other, and the first screw rod (11) is screwed into the upper screw hole (10) to fix the position of the L-shaped plate (7), so that the slag discharge hole 4 is exposed; Step 3: Use a high-pressure air pump (31) to deliver gas into the hollow gas delivery pipe (32) and the two exhaust pipes (33), and the high-pressure gas pushes the gravity magnetic block (37) upward. The gravity magnetic block (37) uses two thrust rods (39) to open the concave closing plate (310) and the convex closing plate (311), and the high-pressure gas blows the particles stuck in the mesh of the conical filter (2) from bottom to top to the top of the conical filter (2); Step 4: The motor (313) drives the high-pressure air pump (31) and the hollow air pipe (32) to rotate through the gear 1 (314) and the gear 2 (315). The hollow air pipe (32) drives the two exhaust pipes (33) and the two cleaning rollers (14) to rotate on the upper surface and the lower surface of the conical filter (2). The exhaust pipe (33) fully blows out the particles stuck in the mesh of the conical filter (2), and the cleaning roller (14) sweeps the blown particles to the slag discharge hole (4) to be discharged from the filter tank (1).

Images