Coating production filter device

Abstract

This utility model discloses a coating production filtration device, comprising: a feeding hopper supported by a bracket, with an inlet pipe connected to the upper end of one outer wall of the feeding hopper; and a filtration unit located below the feeding hopper and connected by a connecting pipe, the filtration unit comprising a first filtration component, a second filtration component, and a third filtration component, arranged sequentially from top to bottom and interconnected by connecting pipes, with an outward conveying pipe at the bottom of the third filtration component. The first, second, and third filtration components respectively filter the coating from coarse to fine, thereby improving the coating quality. The three-stage progressive filtration structure achieves step-by-step purification from coarse to fine, significantly improving the removal rate of minute impurities and meeting the stringent purity requirements of precision industries such as optical instrument coatings.

Description

Technical Field

[0001] This utility model relates to the field of paint production and processing technology, specifically to a paint production filtration device. Background Technology

[0002] Coatings are fluids composed of film-forming substances, pigments, solvents, and additives. When applied to the surface of an object, they form a solid film with functions such as protection, decoration, rust prevention, and insulation. They are widely used in construction, automobiles, furniture, and industrial equipment. The purpose of coating filtration is to remove mechanical impurities, undispersed pigment particles, and foreign matter introduced during the production process. This ensures a uniform and fine coating texture, preventing defects such as rough surfaces, pinholes, and craters after application. It also protects subsequent coating equipment (such as spray guns and pipes) from particle clogging, guaranteeing the coating's application performance and the final coating quality.

[0003] A search revealed that Chinese patent application number CN202210943851.4 discloses an automatic filtration device for the production of polyurethane waterproof coatings, including a filter tank. The filter tank has an inlet pipe on one side of its upper end and an outlet pipe at the bottom. A fixedly connected partition plate is provided in the middle of the filter tank. The partition plate has multiple separation holes. Filter screens in a cylindrical shape are connected to each other in the separation holes at the bottom of the partition plate. Each filter screen has a rotatable rotating shaft in the middle. Multiple fixedly connected scrapers for scraping impurities from the inner wall of the filter screen are mounted on the rotating shaft inside the filter screen.

[0004] However, the above-mentioned technical solutions and traditional coating filtration equipment still have defects, such as low filtration accuracy, which can only be applied to ordinary civilian coatings and cannot be applied to precision industries (such as optical instrument coatings). The limited filtration accuracy makes it difficult to effectively remove tiny impurities in the coating, resulting in certain quality problems in the filtered coating.

[0005] Therefore, we need to propose a filtration device for paint production. Utility Model Content

[0006] The purpose of this invention is to provide a filtration device for paint production, which adopts a three-stage progressive filtration structure to achieve step-by-step purification from coarse to fine, greatly improving the removal rate of minute impurities, meeting the stringent purity requirements of precision industries such as optical instrument coatings, overcoming the limitation of traditional equipment that can only be used with ordinary civilian paints, and reducing the defect rate of the filtered paint, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] The coating production filtration device includes:

[0009] The feeding bin is supported by a bracket, and a feeding pipe connected to the feeding bin is provided on the upper end of one outer wall of the feeding bin.

[0010] A filtration unit is located below the feeding hopper and connected by a connecting pipe. The filtration unit includes a first filtration component, a second filtration component, and a third filtration component. The first filtration component, the second filtration component, and the third filtration component are arranged sequentially from top to bottom and are connected to each other through a connecting pipe. A material conveying pipe for outward material conveying is provided at the bottom of the third filtration component. The first filtration component, the second filtration component, and the third filtration component respectively filter the coating from coarse to fine, thereby improving the quality of the coating.

[0011] Preferably, it also includes a fixing unit disposed on the connecting pipe. The fixing unit includes an upper flange and a lower flange, and three sets of fixing units are provided corresponding to the first filter assembly, the second filter assembly and the third filter assembly.

[0012] Preferably, the first filter assembly, the second filter assembly, and the third filter assembly all include a fixed plate and a filter element. The fixed plate has an opening in the center for the coating to pass through, and the filter element is disposed inside the opening. The fixed plate is fixed between the upper flange and the lower flange of the fixed unit by fixing screws. Holes for the fixing screws to pass through are distributed around the upper flange, the lower flange, and the fixed plate.

[0013] Preferably, sealing rings are provided on the contact surfaces of the upper and lower flanges with the fixed plate. Annular first sealing grooves are provided on both the upper and lower surfaces of the fixed plate. Second sealing grooves corresponding to the first sealing grooves are provided on the bottom surface of the upper flange and the top surface of the lower flange. The paint channel is located inside the first sealing groove, and the hole for the screw to pass through is located outside the first sealing groove. When the upper and lower flanges fix the fixed plate, the sealing rings are embedded inside the upper and lower sealing grooves.

[0014] Preferably, a pressure pump is connected to the feed pipe to pressurize the input paint, and a one-way valve is installed on the feed pipe to prevent paint backflow.

[0015] Preferably, a motor is installed on the top of the feeding hopper, the output end of the motor is connected to a shaft through a coupling, the shaft is rotatably installed on the top of the feeding hopper through bearings, the shaft extends into the inner cavity of the feeding hopper and blades are welded to the outer wall of the shaft.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. It adopts a three-stage progressive filtration structure to achieve step-by-step purification from coarse to fine, which greatly improves the removal rate of tiny impurities, meets the stringent requirements of precision industries such as optical instrument coatings for coating purity, and solves the limitation of traditional equipment that can only be used with ordinary civilian coatings. The defect rate of the filtered coating is reduced.

[0018] 2. The third filter component uses a security filter element, such as a sintered metal mesh, which has a high filtration accuracy. The mesh has a wavy design, which increases the filtration area and further improves the ability to intercept tiny impurities. This ensures the quality of the filtered coating, reduces coating defects caused by impurities, and improves the reliability and stability of the product. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the upper flange of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the first sealing groove of this utility model;

[0022] Figure 4 This is a schematic diagram of the material supply bin of this utility model.

[0023] In the diagram: 1. Feed hopper; 2. Feed pipe; 3. Check valve; 4. Pressure pump; 5. Motor; 6. Shaft; 7. Paddle; 8. Connecting pipe; 9. Upper flange; 10. Lower flange; 11. First filter assembly; 12. Second filter assembly; 13. Third filter assembly; 14. First sealing groove; 15. Sealing ring; 16. Second sealing groove. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4 This utility model provides a technical solution:

[0026] The coating production filtration device includes:

[0027] The feeding bin 1 is supported by a bracket, and a feeding pipe 2 connected to the upper end of the outer wall of the feeding bin 1 is provided.

[0028] The filtration unit is located below the feeding hopper 1 and connected by the connecting pipe 8. The filtration unit includes a first filtration component 11, a second filtration component 12, and a third filtration component 13. The first filtration component 11, the second filtration component 12, and the third filtration component 13 are arranged sequentially from top to bottom and are connected to each other through the connecting pipe 8. The bottom of the third filtration component 13 is provided with a material conveying pipe for outward material conveying. The first filtration component 11, the second filtration component 12, and the third filtration component 13 respectively filter the paint from coarse to fine, thereby improving the paint quality.

[0029] The first filter assembly 11 has a 100-200 mesh metal filter screen with a pore size of 75-150μm; the second filter assembly 12 has a multi-layer non-woven fabric filter with a precision of 20-50μm; the third filter assembly 13 has a security filter, which can be a sintered metal mesh (precision 3-10μm) with a wavy design. The filter is sealed in the ring of the fixed plate by an O-ring.

[0030] The paint enters the feeding hopper 1 through the feed pipe 2 and flows sequentially through the connecting pipe 8 to the first filter assembly 11, the second filter assembly 12, and the third filter assembly 13. Each filter assembly, based on the characteristics of its filter elements, intercepts impurities of different particle sizes in the paint, achieving graded filtration from coarse to fine. The qualified paint after three stages of filtration is output from the conveying pipe at the bottom of the third filter assembly 13. The filtration unit, through multi-stage filtration, gradually improves the purity of the paint, meeting the quality requirements of precision industries and solving the problem of low filtration accuracy in traditional equipment.

[0031] Specifically, the coating first passes through the first filter element 11, where a 100-200 mesh metal filter, with its large pore size, intercepts larger particles of impurities in the coating. Next, the coating flows into the second filter element 12, where multiple layers of non-woven fabric further filter out relatively smaller particles. Finally, the coating reaches the third filter element 13, where a sintered metal mesh, with its high precision (3-10μm) and corrugated design, increases the filtration area and effectively intercepts minute impurities. O-rings ensure a good seal between the filter element and the fixed disc, preventing coating leakage.

[0032] In summary, the combination of filter elements with different precision levels enables multi-stage fine filtration of impurities in coatings, greatly improving filtration accuracy and removing minute impurities that are difficult to filter with traditional equipment, thereby enhancing coating quality and meeting the needs of precision industries.

[0033] For a preferred implementation, please refer to Figure 1-3 :

[0034] It also includes a fixing unit, which is installed on the connecting pipe 8. The fixing unit includes an upper flange 9 and a lower flange 10. Three sets of fixing units are provided corresponding to the first filter assembly 11, the second filter assembly 12, and the third filter assembly 13. The first filter assembly 11, the second filter assembly 12, and the third filter assembly 13 all include a fixing plate and a filter element. The fixing plate has an opening in the center for the paint to pass through. The filter element is placed inside the opening. The fixing plate is fixed between the upper flange 9 and the lower flange 10 of the fixing unit by fixing screws. The upper flange 9, the lower flange 10, and the fixing plate are all surrounded by holes for the fixing screws to pass through.

[0035] During installation, the filter element is installed inside the ring of the fixing plate using the connector. Then, the fixing plate is placed between the upper flange 9 and the lower flange 10, aligning the holes on the upper and lower flanges 10 with those on the fixing plate. The fixing screws are then inserted and tightened to secure the filter assembly. For disassembly, simply unscrew the fixing screws to remove the fixing plate.

[0036] The fixed unit provides a stable and reliable installation structure for the filter assembly, which facilitates the installation, disassembly and replacement of the filter assembly, and makes the equipment maintenance and upkeep easier, improving the efficiency and flexibility of the equipment. It also makes it easy to replace filter elements of different precision according to the type of coating (such as replacing the third filter element 13 with a precision of 1-5μm).

[0037] For a preferred implementation, please refer to Figure 1-3 :

[0038] Sealing rings 15 are provided on the contact surfaces of the upper flange 9 and the lower flange 10 with the fixed plate. The upper and lower surfaces of the fixed plate are provided with annular first sealing grooves 14. The bottom surface of the upper flange 9 and the top surface of the lower flange 10 are provided with second sealing grooves 16 corresponding to the first sealing grooves 14. The paint channel is located inside the first sealing groove 14 and the hole for the screw to pass through is located outside the first sealing groove 14. When the upper flange 9 and the lower flange 10 fix the fixed plate, the sealing rings 15 are embedded inside the upper sealing groove and the lower sealing groove.

[0039] The contact surfaces of the fixed plate and the flange form a double seal through "double sealing groove + sealing ring 15": the sealing ring 15 (solvent-resistant rubber material) is embedded in the first sealing groove 14 of the fixed plate and the second sealing groove 16 of the flange (groove depth 2-3mm). When the screws are tightened, the sealing ring 15 is compressed (compression amount 30%-50%), forming an annular sealing band, which completely seals the paint channel within the sealing area, forming a tight sealing structure and preventing paint from leaking from the gap between the flange and the fixed plate.

[0040] The effective sealing design ensures that the coating does not leak during the filtration process, avoiding coating waste and environmental pollution, while ensuring stable internal pressure, improving filtration efficiency and equipment safety; the sealing structure can withstand pressure ≥0.5MPa, making it suitable for high-pressure filtration scenarios (such as pressurized delivery of high-viscosity coatings).

[0041] For a preferred implementation, please refer to Figure 1-4 :

[0042] A pressure pump 4 is connected to the feed pipe 2 to pressurize the input paint. A one-way valve 3 is installed on the feed pipe 2 to prevent paint backflow. A motor 5 is installed on the top of the feeding hopper 1. The output end of the motor 5 is connected to the shaft 6 through a coupling. The shaft 6 is rotatably mounted on the top of the feeding hopper 1 through bearings. The shaft 6 extends into the inner cavity of the feeding hopper 1, and a blade 7 is welded to the outer wall of the shaft 6.

[0043] The pressurized pump 4 (pressure adjustable from 0.1 to 0.3 MPa) on the feed pipe 2 provides power to accelerate the coating through the multi-stage filtration assembly; the one-way valve 3 prevents the coating from flowing back due to pressure fluctuations (reverse sealing pressure ≥ 0.4 MPa). The motor 5 in the feed hopper 1 drives the paddle 7 to rotate (speed 50-150 r / min) to prevent the coating from settling and stratifying in the hopper, ensuring that the coating concentration entering the filtration unit is uniform.

[0044] The pressure pump 4 improves the coating delivery efficiency, enhances the filtration power, and solves the problem of slow filtration speed for high-viscosity coatings; the one-way valve 3 ensures the stability and continuity of the material supply; the stirring device makes the coating uniform, prevents impurities from settling and clumping, improves the fluidity and filtration performance of the coating, and further enhances the filtration effect and coating quality.

[0045] The pressure pump 4 is installed on the feed pipe 2, close to the source of the paint (such as the outlet of the paint storage tank). This installation position ensures that the paint receives an initial pressure boost as soon as it enters the feed pipe 2, providing sufficient power for subsequent flow within the pipeline. The pump inlet is connected to the raw material delivery pipe via a flange, and the outlet is connected to the feed pipe 2 via a high-pressure hose (pressure resistance ≥0.6MPa). The connection is sealed with an O-ring 15 (fluororubber material) to prevent paint leakage under high pressure (leakage rate ≤0.1% / h).

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A filtration device for paint production, characterized in that, include: The feeding bin (1) is supported by a bracket, and a feeding pipe (2) connected to the feeding bin (1) is provided on the upper end of the outer wall of one side of the feeding bin (1). The filter unit is located below the feed hopper (1) and connected by a connecting pipe (8). The filter unit includes a first filter component (11), a second filter component (12), and a third filter component (13). The first filter component (11), the second filter component (12), and the third filter component (13) are arranged sequentially from top to bottom and are connected to each other through the connecting pipe (8). The bottom of the third filter component (13) is provided with a material conveying pipe for conveying material outward. The first filter component (11), the second filter component (12), and the third filter component (13) respectively filter the coating from coarse to fine, thereby improving the quality of the coating.

2. The coating production filtration device according to claim 1, characterized in that: It also includes a fixing unit, which is set on the connecting pipe (8). The fixing unit includes an upper flange (9) and a lower flange (10). The fixing unit is provided in three sets corresponding to the first filter assembly (11), the second filter assembly (12) and the third filter assembly (13).

3. The coating production filtration device according to claim 2, characterized in that: The first filter assembly (11), the second filter assembly (12) and the third filter assembly (13) all include a fixed plate and a filter element. The fixed plate has an opening in the center for the paint to pass through. The filter element is placed inside the opening. The fixed plate is fixed between the upper flange (9) and the lower flange (10) of the fixed unit by fixing screws. The upper flange (9), the lower flange (10) and the fixed plate are all surrounded by holes for the fixing screws to pass through.

4. The coating production filtration device according to claim 3, characterized in that: The upper flange (9) and lower flange (10) are provided with sealing rings (15) on their contact surfaces with the fixed plate. The upper and lower surfaces of the fixed plate are provided with annular first sealing grooves (14). The bottom surface of the upper flange (9) and the top surface of the lower flange (10) are provided with second sealing grooves (16) corresponding to the first sealing grooves (14). The paint channel is located inside the first sealing groove (14) and the hole for the screw to pass through is located outside the first sealing groove (14). When the upper flange (9) and lower flange (10) fix the fixed plate, the sealing rings (15) are embedded inside the upper sealing groove and the lower sealing groove.

5. The coating production filtration device according to claim 1, characterized in that: A pressure pump (4) is connected to the feed pipe (2) to pressurize the input paint. A one-way valve (3) is installed on the feed pipe (2) to prevent paint backflow.

6. The coating production filtration device according to claim 1, characterized in that: The top of the feeding bin (1) is equipped with a motor (5), the output end of the motor (5) is connected to a shaft (6) through a coupling, the shaft (6) is rotatably mounted on the top of the feeding bin (1) through a bearing, the shaft (6) extends into the inner cavity of the feeding bin (1) and a blade (7) is welded to the outer wall of the shaft (6).

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