Filtering device for producing environment-friendly polyurethane paint with low VOC (volatile organic compound) emission

Abstract

The utility model relates to the technical field of filtering devices, and discloses a low VOC emission environment-friendly filtering device for polyurethane paint production, which comprises a filtering tank, a feed port is arranged at the top end of the filtering tank close to one side, and a mounting seat is fixedly mounted at the lower position in the filtering tank. A mounting disc is mounted on the inner side of the mounting seat through fixing bolts, a plurality of threaded mounting grooves with different sizes are formed in the top end of the mounting disc, and a fine filter screen frame, a filter screen frame and a primary filter screen frame are sequentially mounted on the mounting disc through the bolt mounting grooves; by means of the primary filter screen frame, the filter screen frame, the discharging port and the activated carbon adsorber, the effect of layered filtration of impurities with different particle sizes can be achieved, when the filtered impurities are precipitated on the lower portion, normal filtration on the upper portion cannot be affected, the disassembly, assembly and cleaning frequency is reduced, discharged gas can be adsorbed and purified, emission of VOC is reduced, and pollution to the environment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of filtration device technology, specifically a low-VOC emission environmentally friendly filtration device for the production of polyurethane paint. Background Technology

[0002] Polyurethane paint, also known as polyurethane varnish, refers to coatings containing a considerable number of urethane bonds in their film. It has a tough film, full gloss, strong adhesion, and is water-resistant, wear-resistant, and corrosion-resistant. It is widely used in high-end wooden furniture and can also be used on metal surfaces. Filter devices are devices that remove unreacted particles, gels, dust, and other impurities from raw materials or finished products.

[0003] Chinese patent provides a filtration device for polyurethane paint production, publication number CN220309877U, which includes a base, a filter barrel on the top of the base, a retainer at both ends of the filter barrel, a snap-fit ​​device on the top of each of the two retainers, and a fixing frame snapped onto the top of each of the two snap-fit ​​devices.

[0004] The above device uses screws to disassemble the fixing plate and the extrusion cylinder, thereby separating the feeding tray and the filter from the filter barrel, achieving the purpose of rapid separation and subsequent rapid cleaning. After separation, it can be removed and cleaned by the user.

[0005] However, its filtration structure is relatively simple. Although it can be disassembled and cleaned, the volatile organic compounds in the filtration process are directly emitted with the exhaust gas, which is not environmentally friendly and will cause certain harm to the surrounding environment. In addition, the filtration effect of filtering polyurethane paint through a single filter is poor, and rework may be required later. Utility Model Content

[0006] The purpose of this invention is to provide a low-VOC emission, environmentally friendly filtration device for the production of polyurethane paint, which can effectively solve the problems in the background art.

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

[0008] A low-VOC emission environmentally friendly filtration device for producing polyurethane paint includes a filter tank. A feed inlet is provided at one side of the top of the filter tank. An installation base is fixedly installed at the lower part of the interior of the filter tank. An installation plate is installed on the inner side of the installation base by fixing bolts.

[0009] The top of the mounting plate is provided with several threaded mounting slots of different sizes, and the mounting plate is used to install a fine filter screen frame, a filter screen frame, and a pre-filter screen frame in sequence through the bolt mounting slots. The pre-filter screen frame is located on the outermost side, and the fine filter screen frame is located on the innermost side. An agitator motor is installed at the center of the top of the filter tank. An agitator plate is rotatably installed at the upper part of the inside of the filter tank via a rotating rod, and the end of the drive shaft of the agitator motor passes through the top of the filter tank and is fixedly connected to the rotating rod of the agitator plate.

[0010] Preferably, the fine filter frame, the filter frame, and the pre-filter frame are cylindrical, and the filter size of the fine filter frame, the filter frame, and the pre-filter frame increases sequentially.

[0011] Preferably, a bearing is provided at the connection between the drive shaft of the agitator motor and the filter tank, and the drive shaft of the agitator motor is rotatably connected to the filter tank through the bearing.

[0012] Preferably, an exhaust port is provided on the upper side of the outer ring of the filter tank, away from the feed inlet, and an activated carbon adsorber is connected to the side of the exhaust port away from the filter tank.

[0013] Preferably, the mounting base is detachably connected to the mounting plate by fixing bolts, the front end of the filter tank is provided with a disassembly groove, a sealing plate is installed in the disassembly groove by connecting bolts, and a sealing strip is provided at the connection between the sealing plate and the filter tank.

[0014] Preferably, a discharge port that adapts to the fine filter screen frame is provided at the center of the upper and lower ends of the mounting plate, the mounting base is inclined and the side away from the discharge port is raised, and a discharge valve is provided at the bottom of the filter tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention, by setting up a pre-filter frame, a filter frame, and a discharge port to work together, can achieve layered filtration of impurities of different particle sizes during filtration, thereby improving filtration efficiency and ensuring the quality of paint and filtration effect. In addition, the pre-filter frame, filter frame, and fine filter frame are cylindrical, so when the filtered impurities settle at the bottom, they will not affect the normal filtration above, thus extending the forward filtration time and reducing the frequency of disassembly and cleaning.

[0017] By setting up an activated carbon adsorber with a feed inlet, the gas is guided to the activated carbon adsorber for discharge during filtration. The activated carbon adsorber can adsorb and purify the emitted gas, thereby reducing VOC emissions and ensuring that the concentration meets environmental protection standards, thus reducing environmental pollution. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of a low-VOC emission environmentally friendly polyurethane paint production filtration device in an embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional view of the internal structure of the filter tank in an embodiment of this utility model;

[0020] Figure 3 This is an exploded view of the mounting base and mounting plate structure in an embodiment of this utility model.

[0021] In the diagram: 1. Filter tank; 2. Feed inlet; 3. Stirring motor; 4. Stirring plate; 5. Mounting base; 6. Mounting plate; 7. Fine filter screen frame; 8. Filter screen frame; 9. Primary filter screen frame; 10. Discharge port; 11. Discharge valve; 12. Sealing plate; 13. Activated carbon adsorber. Detailed Implementation

[0022] 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.

[0023] Example 1

[0024] Combination Figures 1-3 A low-VOC emission environmentally friendly filtration device for polyurethane paint production includes a filter tank 1, an inlet 2 located on one side of the top of the filter tank 1, an mounting base 5 fixedly installed inside the filter tank 1 at the lower position, and an mounting plate 6 installed on the inner side of the mounting base 5 by fixing bolts.

[0025] See Figure 2Furthermore, the mounting plate 6 has several threaded mounting slots of different sizes at its top, and the mounting plate 6 is equipped with a fine filter screen frame 7, a filter screen frame 8, and a primary filter screen frame 9 sequentially via bolt mounting slots. The primary filter screen frame 9 is on the outermost side, and the fine filter screen frame 7 is on the innermost side. An agitator motor 3 is installed at the center of the top of the filter tank 1. An agitator plate 4 is rotatably mounted on the upper part of the interior of the filter tank 1 via a rotating rod. The end of the drive shaft of the agitator motor 3 passes through the top of the filter tank 1 and is fixedly connected to the rotating rod of the agitator plate 4. Frame 7, filter screen frame 8, and primary filter screen frame 9 are cylindrical, and the filter size of the fine filter screen frame 7, filter screen frame 8, and primary filter screen frame 9 increases sequentially. The drive shaft of the agitator motor 3 is provided with a bearing at the connection between it and the filter tank 1, and the drive shaft of the agitator motor 3 is rotatably connected to the filter tank 1 through the bearing. A discharge port 10 that is compatible with the fine filter screen frame 7 is provided at the center of the upper and lower ends of the mounting plate 6. The mounting base 5 is inclined, and the side away from the discharge port 10 is raised. A discharge valve 11 is provided at the bottom of the filter tank 1.

[0026] Specifically, the polyurethane paint to be processed can be injected into the filter tank 1 through the feed inlet 2 as needed. The paint is then filtered through the primary filter frame 9, the filter frame 8, and the fine filter frame 7 in the filter tank 1. The size of the filter holes on the primary filter frame 9, the filter frame 8, and the fine filter frame 7 decreases from large to small. When the paint comes into contact with the primary filter frame 9, large particles are intercepted, and the paint is initially purified. The subsequent paint flows to the filter frame 8 and the fine filter frame 7 for step-by-step filtration to ensure that even small particles are effectively removed. This stratified filtration improves the filtration effect. The filtered paint then flows into the lower part of the filter tank 1 through the discharge port 10 to complete the filtration process. At this point, the discharge valve 11 can be opened to release the filtered paint.

[0027] Example 2

[0028] See Figure 3 and Figure 2 Furthermore, based on Embodiment 1, an exhaust port is provided on the upper side of the outer ring of the filter tank 1, away from the feed inlet 2. An activated carbon adsorber 13 is connected to the side of the exhaust port away from the filter tank 1. The mounting base 5 is detachably connected to the mounting plate 6 by fixing bolts. A disassembly groove is provided at the front end of the filter tank 1. A sealing plate 12 is installed in the disassembly groove by connecting bolts, and a sealing strip is provided at the connection between the sealing plate 12 and the filter tank 1.

[0029] Specifically, the filtration process takes place entirely within a sealed filter tank 1, which is connected to an activated carbon adsorber 13. The activated carbon adsorber 13 adsorbs and purifies the emitted waste gas, thereby reducing VOC emissions and ensuring that the concentration of volatile organic compounds meets environmental protection standards, thus reducing environmental pollution. The fine filter frame 7, filter frame 8, and primary filter frame 9 can all be detached and installed on the mounting plate 6. The mounting plate 6 is installed on the mounting base 5 by several fixing bolts. After multiple filtrations, the sealing plate 12 can be removed as needed, and the fine filter frame 7, filter frame 8, and primary filter frame 9 can be removed to clean the filtered impurities.

[0030] In actual operation, the polyurethane paint to be processed can be injected into the filter tank 1 through the feed inlet 2 as needed. The paint is then filtered through the primary filter frame 9, filter frame 8, and fine filter frame 7 in the filter tank 1. The size of the filter holes on the primary filter frame 9, filter frame 8, and fine filter frame 7 decreases from large to small. When the paint comes into contact with the primary filter frame 9, large particles are intercepted, and the paint is initially purified. The subsequent paint flows to the filter frame 8 and fine filter frame 7 for step-by-step filtration to ensure that small particles are also effectively removed. This stratified filtration improves the filtration effect. The filtered paint then flows into the lower part of the filter tank 1 through the discharge port 10 to complete the filtration process. At this point, the discharge valve 11 can be opened to release the filtered paint.

[0031] Furthermore, the fine filter frame 7, filter frame 8, and primary filter frame 9 are cylindrical, so the filtered impurities will settle at the bottom, but the top will not be blocked by the settled impurities, thereby reducing the impact on paint filtration, facilitating the extension of forward filtration time, and reducing the frequency of disassembly and cleaning. At the same time, by starting the stirring motor 3, the stirring plate 4 can be driven to rotate, and the stirring plate 4 can agitate the paint, preventing it from standing still for filtration and further improving filtration efficiency.

[0032] The filtration process takes place entirely within a sealed filter tank 1, which is connected to an activated carbon adsorber 13. The activated carbon adsorber 13 adsorbs and purifies the emitted waste gas, thereby reducing VOC emissions and ensuring that the concentration of volatile organic compounds meets environmental protection standards, thus reducing environmental pollution. The fine filter frame 7, filter frame 8, and primary filter frame 9 can all be detached and installed on the mounting plate 6. The mounting plate 6 is installed on the mounting base 5 by several fixing bolts. After multiple filtrations, the sealing plate 12 can be removed as needed, and the fine filter frame 7, filter frame 8, and primary filter frame 9 can be removed to clean the filtered impurities.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-VOC emission environmentally friendly filtration device for producing polyurethane paint, comprising a filter tank (1), wherein a feed inlet (2) is provided on one side of the top of the filter tank (1), characterized in that: An installation base (5) is fixedly installed at the lower part of the interior of the filter tank (1), and an installation plate (6) is installed on the inner side of the installation base (5) by fixing bolts. The top of the mounting plate (6) is provided with several threaded mounting slots of different sizes, and the mounting plate (6) is installed with a fine filter screen frame (7), a filter screen frame (8), and a primary filter screen frame (9) in sequence through the bolt mounting slots. The primary filter screen frame (9) is located on the outermost side, and the fine filter screen frame (7) is located on the innermost side. The top of the filter tank (1) is equipped with an agitator motor (3) at the center position. The filter tank (1) is equipped with an agitator plate (4) at the upper part of the interior through a rotating rod. The end of the drive shaft of the agitator motor (3) passes through the top of the filter tank (1) and is fixedly connected to the rotating rod of the agitator plate (4).

2. The filtration device for producing low-VOC environmentally friendly polyurethane paint according to claim 1, characterized in that: The fine filter frame (7), filter frame (8), and primary filter frame (9) are cylindrical, and the filter size of the fine filter frame (7), filter frame (8), and primary filter frame (9) increases sequentially.

3. The filtration device for producing low-VOC environmentally friendly polyurethane paint according to claim 1, characterized in that: The drive shaft of the agitator (3) is provided with a bearing at the connection between it and the filter tank (1), and the drive shaft of the agitator (3) is rotatably connected to the filter tank (1) through the bearing.

4. The filtration device for producing low-VOC environmentally friendly polyurethane paint according to claim 1, characterized in that: An exhaust port is provided on the upper side of the outer ring of the filter tank (1) and away from the feed inlet (2). An activated carbon adsorber (13) is connected to the side of the exhaust port away from the filter tank (1).

5. The filtration device for producing low-VOC-emission environmentally friendly polyurethane paint according to claim 2, characterized in that: The mounting base (5) is detachably connected to the mounting plate (6) by fixing bolts. The front end of the filter tank (1) is provided with a disassembly groove. A sealing plate (12) is installed in the disassembly groove by connecting bolts, and a sealing strip is provided at the connection between the sealing plate (12) and the filter tank (1).

6. The filtration device for producing low-VOC environmentally friendly polyurethane paint according to claim 5, characterized in that: A discharge port (10) that is compatible with the fine filter screen frame (7) is provided at the center of the upper and lower ends of the mounting plate (6). The mounting base (5) is inclined and the side away from the discharge port (10) is raised. A discharge valve (11) is provided at the bottom of the filter tank (1).

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