A multi-stage filtering and purifying device for paint production

Abstract

The application discloses a multi-stage filtering and purifying device in paint production, and belongs to the field of paint production and purification devices. The purification device comprises oppositely arranged filter cartridges, a multi-stage filtering mechanism arranged in the filter cartridges, and a first pipeline and a second pipeline arranged between the two filter cartridges. The top and bottom of the filter cartridge are respectively provided with a third pipeline and a fourth pipeline in communication with the filter cartridge, the third pipeline is fixedly communicated with the first pipeline, and the fourth pipeline is fixedly communicated with the second pipeline. One end of the first pipeline and the second pipeline is fixedly provided with a first electromagnetic valve, and the other end is fixedly provided with a second electromagnetic valve. Through cooperation of the two filter cartridges and the first electromagnetic valve and the second electromagnetic valve, a double-path parallel filtering mode can be realized, and the problem that the traditional device must be stopped when filter materials are replaced is solved. When the multi-stage filtering mechanism in one of the filter cartridges is replaced, the overall production process does not need to be interrupted, production efficiency is effectively improved, and raw material loss and cleaning cost caused by shutdown are reduced.

Description

Technical Field

[0001] This application relates to the technical field of purification devices for paint production, specifically a multi-stage filtration and purification device for paint production. Background Technology

[0002] In the paint production process, filtration and purification are crucial to ensuring the purity and quality of paint products. Among these processes, multi-stage filtration and purification devices, which remove impurities, particles, and colloids from raw materials through filter media of varying precision, effectively improve the dispersibility and stability of paints and have become indispensable key equipment in modern paint production lines.

[0003] Currently, multi-stage filtration and purification devices widely used in the industry typically consist of a pre-treatment filtration layer, a fine filtration layer, and an ultrafiltration layer. The filter media for each stage are selected based on filtration requirements, using materials such as non-woven fabric, glass fiber filter paper, ceramic membranes, or polymer composite membranes. During actual operation, as filtration continues, impurities in the coating accumulate on the surface of the filter media. When the pores of the filter media become clogged to a certain extent, filtration efficiency decreases significantly, and may even affect the normal flow of the coating.

[0004] When filter media becomes clogged and needs replacement, the entire filtration system must be shut down. Production can only resume after the old filter media is removed, the new media is installed, and the system is readjusted. This shutdown for replacement not only interrupts continuous production and reduces efficiency, but also can cause problems such as sedimentation and hardening due to paint remaining in the pipelines during downtime, increasing raw material losses and subsequent cleaning costs. Especially for large-scale paint manufacturers, frequent shutdowns can severely impact production planning, causing significant economic losses and becoming a major bottleneck restricting the continuity and stability of paint production.

[0005] Therefore, this application provides a multi-stage filtration and purification device for paint production to solve the above-mentioned problems. Utility Model Content

[0006] This application provides a multi-stage filtration and purification device for paint production, which aims to solve the problems mentioned in the background art, such as the need to shut down existing multi-stage filtration and purification devices when the filter material is clogged and needs to be replaced, resulting in production interruption and reduced efficiency.

[0007] To achieve the above objectives, this application provides the following technical solution: a multi-stage filtration and purification device for paint production, comprising filter cartridges arranged opposite each other, a multi-stage filtration mechanism disposed within the filter cartridges, and a first pipe and a second pipe disposed between the two filter cartridges; a third pipe and a fourth pipe are respectively disposed at the top and bottom of the filter cartridges and communicate with them, the third pipe being fixedly connected to the first pipe, and the fourth pipe being fixedly connected to the second pipe; a first solenoid valve is fixedly installed at one end of the first pipe and the second pipe, and a second solenoid valve is fixedly installed at the other end. When it is necessary to replace the multi-stage filtration mechanism in one of the filter cartridges, the first solenoid valve or the second solenoid valve on the side where the filter cartridge is located is closed, while the corresponding second solenoid valve or the first solenoid valve on the other side is opened, allowing the paint to continue to complete the filtration process through the filter cartridge on the other side, ensuring the continuity of production.

[0008] Preferably, both the first and second pipes are tee pipes. The structure of the tee pipe ensures smooth flow of the coating within the pipe, avoiding increased flow resistance or dead zones caused by complex pipe connections, and ensuring that the filtration efficiency is not affected.

[0009] Preferably, to facilitate pipe connections: the first and third pipes, as well as the second and fourth pipes, are all connected to each other via flanges, and sealing rings are provided at the joints. The flange connection method ensures the robustness and stability of the pipe connections, can withstand the pressure generated when the coating flows within the pipes, and prevents loosening or detachment at the joints. Simultaneously, the sealing rings effectively enhance the sealing performance at the joints, preventing leakage of the coating during transportation, reducing material waste and environmental pollution, and facilitating pipe disassembly and installation, thus providing convenience for later maintenance and replacement.

[0010] Preferably, the multi-stage filtration mechanism includes a polytetrafluoroethylene (PTFE) membrane filter cartridge fixedly installed inside the filter cartridge by bolts, a pleated polypropylene filter cartridge inserted inside the PTFE membrane filter cartridge, a sintered metal felt filter cartridge inserted inside the pleated polypropylene filter cartridge, and a stainless steel wedge-shaped filter screen fixedly installed at the port of the sintered metal felt filter cartridge. By combining multiple filter cartridges of different materials and structures, a high-precision, high-efficiency multi-stage filtration system is formed, capable of removing impurities of different particle sizes and types from the coating step by step, greatly improving the filtration and purification effect, and ensuring the purity and quality of the coating product.

[0011] Preferably, to facilitate the drainage of the cleaning fluid inside the filter cartridge: the bottom of the filter cartridge is tapered, and a third solenoid valve is fixedly installed at the bottom of the filter cartridge. The tapered bottom design facilitates the collection and drainage of the cleaning fluid inside the filter cartridge, preventing cleaning fluid residue at the bottom of the filter cartridge and improving the cleaning effect.

[0012] Preferably, to facilitate the removal of the multi-stage filtration mechanism inside the filter cartridge: a sealing cap is provided at the upper opening of the filter cartridge, a sealing ring is provided between the sealing cap and the filter cartridge, and multiple screws are hinged at equal intervals in a ring on the top side of the filter cartridge. A U-shaped groove for fitting the screws is provided on the side of the sealing cap, and a handle nut is threaded onto the screws to drive the sealing cap closer to the filter cartridge. The cooperation between the sealing cap and the sealing ring ensures the sealing of the upper opening of the filter cartridge, preventing paint leakage during filtration and ensuring normal filtration operation. The structural design of the screws, U-shaped groove, and handle nut makes the installation and removal of the sealing cap more convenient, eliminating the need for complex tools, reducing operational difficulty, facilitating quick removal of the multi-stage filtration mechanism inside the filter cartridge for replacement or maintenance, saving operation time, and improving work efficiency.

[0013] This application achieves a dual-path parallel filtration mode by using two filter cartridges in conjunction with a first solenoid valve and a second solenoid valve, solving the problem of having to shut down the machine when changing filter media in traditional devices. When replacing the multi-stage filtration mechanism inside one of the filter cartridges, the overall production process can be maintained without interruption, effectively improving production efficiency and reducing raw material losses and cleaning costs caused by downtime. This is particularly suitable for the continuous production needs of large-scale paint manufacturing enterprises.

[0014] This application uses multiple filter cartridges of different materials and structures to form a high-precision, high-efficiency multi-stage filtration system, which can remove impurities of different particle sizes and types from the coating step by step, greatly improving the filtration and purification effect and ensuring the purity and quality of the coating products.

[0015] The sealing cap and sealing ring of this application ensure the airtightness of the opening at the top of the filter cartridge, preventing the coating from leaking out during the filtration process and ensuring the normal operation of the filtration. The structural design of the screw, U-shaped groove, and handle nut makes the installation and removal of the sealing cap more convenient, eliminating the need for complex tools, reducing the difficulty of operation, and facilitating the quick removal of the multi-stage filtration mechanism inside the filter cartridge for replacement or maintenance, saving operation time and improving work efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a multi-stage filtration and purification device used in paint production. Figure 2 This is a schematic diagram of the internal structure of the filter cartridge; Figure 3 This is a schematic diagram of a multi-stage filtration mechanism.

[0017] In the picture: 1. Filter cartridge; 11. Third pipe; 12. Fourth pipe; 2. Multi-stage filtration mechanism; 21. PTFE membrane filter cartridge; 22. Pleated polypropylene filter cartridge; 23. Metal sintered felt filter cartridge; 24. Stainless steel wedge filter screen; 3. First pipe; 4. Second pipe; 5. First solenoid valve; 6. Second solenoid valve; 7. Third solenoid valve; 8. Sealing cap; 81. Screw; 82. Handle nut. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] Example 1 This embodiment provides a multi-stage filtration and purification device for paint production, such as... Figure 1-3 As shown, the purification device includes filter cartridges 1 arranged opposite each other, a multi-stage filtration mechanism 2 disposed within the filter cartridges 1, and a first pipe 3 and a second pipe 4 disposed between the two filter cartridges 1. A third pipe 11 and a fourth pipe 12, respectively, are disposed at the top and bottom of the filter cartridges 1 and communicate with them. The third pipe 11 is fixedly connected to the first pipe 3, and the fourth pipe 12 is fixedly connected to the second pipe 4. A first solenoid valve 5 is fixedly installed at one end of the first pipe 3 and the second pipe 4, and a second solenoid valve 6 is fixedly installed at the other end. Through the cooperation of the two filter cartridges 1 with the first solenoid valve 5 and the second solenoid valve 6, a dual-path parallel filtration mode can be achieved, solving the problem of having to stop the machine when replacing filter media in traditional devices. When replacing the multi-stage filtration mechanism 2 inside one of the filter cartridges 1, there is no need to interrupt the overall production process, effectively improving production efficiency and reducing raw material loss and cleaning costs caused by downtime. This is particularly suitable for the continuous production needs of large-scale paint production enterprises. The two filter cartridges 1 form a parallel path through the first pipe 3 and the second pipe 4. The first solenoid valve 5 and the second solenoid valve 6 at both ends of the first pipe 3 and the second pipe 4 are used to control the opening and closing of the corresponding paths. When it is necessary to replace the multi-stage filtration mechanism 2 in one of the filter cartridges 1, close the first solenoid valve 5 or the second solenoid valve 6 on the side where the filter cartridge 1 is located, and at the same time open the corresponding second solenoid valve 6 or the first solenoid valve 5 on the other side, so that the coating can continue to complete the filtration process through the filter cartridge 1 on the other side, ensuring the continuity of production.

[0020] Both the first pipe 3 and the second pipe 4 are tee pipes. The structure of the tee pipes ensures smooth flow of the coating material within the pipes, avoiding increased flow resistance or dead zones caused by complex pipe connections, and ensuring that the filtration efficiency is not affected. The tee pipes have one inlet and two outlets. The first pipe 3 serves as the feed side tee pipe, with its inlet used to receive the coating material to be filtered, and its two outlets connected to the tops of the two filter cartridges 1 via the third pipe 11, thus diverting the coating material to the two filter cartridges 1. The second pipe 4 serves as the discharge side tee pipe, with its two inlets connected to the bottoms of the two filter cartridges 1 via the fourth pipe 12, and its outlet used to discharge the filtered coating material, thus converging the filtered coating material from the two filter cartridges 1.

[0021] To facilitate pipe connections, the first pipe 3 and the third pipe 11, as well as the second pipe 4 and the fourth pipe 12, are all connected to each other via flanges, with sealing rings installed at the joints. The flange connection method ensures the robustness and stability of the pipe connections, capable of withstanding the pressure generated by the paint flowing within the pipes, and preventing loosening or detachment at the joints. Simultaneously, the sealing rings effectively enhance the sealing performance at the joints, preventing paint leakage during transportation, reducing material waste and environmental pollution, and facilitating pipe disassembly and installation, thus providing convenience for later maintenance and replacement. Multiple evenly distributed bolt holes are provided on the flanges, allowing two corresponding flanges to be tightly connected together with bolts, ensuring a secure connection between the first pipe 3 and the third pipe 11, and between the second pipe 4 and the fourth pipe 12. The sealing rings at the joints are compressed between the two flanges, using their elastic deformation to fill the gaps between the flange contact surfaces, thereby achieving a sealing effect and preventing paint leakage from the joints.

[0022] The multi-stage filtration mechanism 2 includes a polytetrafluoroethylene (PTFE) membrane filter cartridge 21 bolted into the filter cartridge 1, a pleated polypropylene filter cartridge 22 inserted into the PTFE membrane filter cartridge 21, a sintered metal felt filter cartridge 23 inserted into the pleated polypropylene filter cartridge 22, and a stainless steel wedge-shaped filter screen 24 fixedly installed at the port of the sintered metal felt filter cartridge 23. By combining multiple filter cartridges of different materials and structures, a high-precision, high-efficiency multi-stage filtration system is formed, capable of removing impurities of different particle sizes and types from coatings step by step, greatly improving the filtration and purification effect and ensuring the purity and quality of the coating products. At the same time, materials such as PTFE, polypropylene, sintered metal felt, and stainless steel have good corrosion resistance and wear resistance, making them suitable for filtering various types of coatings and extending the service life of the filter cartridges. After the coating enters from the top of filter cartridge 1, it first passes through a stainless steel wedge-shaped filter screen 24, whose wedge structure intercepts larger-diameter impurities. Next, the coating enters a metal sintered felt filter cartridge 23, whose porous structure filters medium-diameter impurities. Then, the coating flows through a pleated polypropylene filter cartridge 22, where the micropores of the polypropylene material further filter smaller-diameter impurities. Finally, it undergoes high-precision filtration through a polytetrafluoroethylene membrane filter cartridge 21, removing fine particles and colloids, achieving deep purification of the coating. The various filter cartridges work together to form a filtration process from coarse to fine, ensuring effective filtration.

[0023] To facilitate the drainage of cleaning fluid inside filter cartridge 1, the bottom of filter cartridge 1 is tapered, and a third solenoid valve 7 is fixedly installed at the bottom. This tapered bottom design facilitates the collection and drainage of cleaning fluid within filter cartridge 1, preventing residue and improving cleaning efficiency. When cleaning the multi-stage filtration mechanism 2 inside filter cartridge 1 is required, the cleaning fluid flows within the cartridge and rinses it. Due to the tapered bottom, the cleaning fluid converges towards the bottom under gravity. Opening the third solenoid valve 7 allows the collected cleaning fluid to be quickly drained from filter cartridge 1 through the tapered structure, completing the drainage process.

[0024] To facilitate the removal of the multi-stage filtration mechanism 2 inside the filter cartridge 1: a sealing cover 8 is provided at the upper opening of the filter cartridge 1, and a sealing ring is provided between the sealing cover 8 and the filter cartridge 1. Multiple screws 81 are hinged at equal intervals in a ring on the top side of the filter cartridge 1. A U-shaped groove is provided on the side of the sealing cover 8 to fit the screws 81. A handle nut 82 is threaded onto the screws 81 to drive the sealing cover 8 closer to the filter cartridge 1. The cooperation between the sealing cover 8 and the sealing ring ensures the sealing of the upper opening of the filter cartridge 1, preventing paint leakage during filtration and ensuring normal filtration operation. The structural design of the screws 81, U-shaped groove, and handle nut 82 makes the installation and removal of the sealing cover 8 more convenient, eliminating the need for complex tools, reducing operational difficulty, and facilitating the quick removal of the multi-stage filtration mechanism 2 inside the filter cartridge 1 for replacement or maintenance, saving operation time and improving work efficiency. When installing the sealing cover 8, place it at the upper opening of the filter cartridge 1, allowing the screw 81 to engage in the U-shaped groove on the side of the sealing cover 8. Then, tighten the handle nut 82, which moves downwards on the screw 81, pushing the sealing cover 8 closer to the filter cartridge 1 until the sealing ring between the sealing cover 8 and the filter cartridge 1 is compressed, achieving a seal. When it is necessary to remove the multi-stage filtration mechanism 2, loosen the handle nut 82 and turn the screw 81 out of the U-shaped groove to remove the sealing cover 8, facilitating operation of the internal multi-stage filtration mechanism 2.

[0025] The control method of this application is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0026] All electrical components mentioned in the text are electrically connected to the main controller and power supply. The main controller can be a conventional and known device such as a computer, and the existing publicly available power connection technology will not be elaborated in the text.

[0027] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0028] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A multi-stage filtration and purification apparatus in paint production, characterized by: It includes a filter cartridge (1) arranged opposite to each other, a multi-stage filtration mechanism (2) disposed in the filter cartridge (1), and a first pipe (3) and a second pipe (4) disposed between the two filter cartridges (1); The top and bottom of the filter cartridge (1) are respectively provided with a third pipe (11) and a fourth pipe (12) communicating with it. The third pipe (11) is fixedly connected to the first pipe (3), and the fourth pipe (12) is fixedly connected to the second pipe (4). A first solenoid valve (5) is fixedly installed at one end of the first pipe (3) and the second pipe (4), and a second solenoid valve (6) is fixedly installed at the other end.

2. The multi-stage filtration and purification device for paint production according to claim 1, characterized in that: Both the first pipe (3) and the second pipe (4) are tee pipes.

3. The multi-stage filtration and purification device for paint production according to claim 1, characterized in that: The first pipe (3) and the third pipe (11), as well as the second pipe (4) and the fourth pipe (12), are all connected to each other by flanges, and sealing rings are provided at the connection points.

4. The multi-stage filtration and purification apparatus for paint production according to claim 1, characterized in that: The multi-stage filtration mechanism (2) includes a polytetrafluoroethylene membrane filter cartridge (21) fixedly installed in the filter cartridge (1) by bolts, a pleated polypropylene filter cartridge (22) inserted in the polytetrafluoroethylene membrane filter cartridge (21), a metal sintered felt filter cartridge (23) inserted in the pleated polypropylene filter cartridge (22), and a stainless steel wedge filter screen (24) fixedly installed at the port of the metal sintered felt filter cartridge (23).

5. The multi-stage filtration and purification apparatus for paint production according to claim 1, characterized in that: The bottom of the filter cartridge (1) is tapered, and a third solenoid valve (7) is fixedly installed at the bottom of the filter cartridge (1).

6. The multi-stage filtration and purification apparatus for paint production according to claim 1, characterized in that: A sealing cap (8) is provided at the upper opening of the filter cylinder (1). A sealing ring is provided between the sealing cap (8) and the filter cylinder (1). Multiple screws (81) are hinged at equal intervals in a ring on the top side of the filter cylinder (1). A U-shaped groove for matching the screws (81) is provided on the side of the sealing cap (8). A handle nut (82) for driving the sealing cap (8) to move closer to the filter cylinder (1) is threaded on the screw (81).

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