Filtering device for producing waterborne polyurethane coating

Abstract

The utility model relates to the technical field of waterborne polyurethane production equipment, and discloses a filtering device for waterborne polyurethane coating production, the filtering device comprises a filtering pipe, the inner wall of the filtering pipe is fixedly connected with three filtering nets, and the interiors of the three filtering nets are rotatably connected with the same rotating shaft. According to the filtering device for production of the waterborne polyurethane coating, three filter screens of different specifications are arranged on the same rotating shaft, graded filtering of the waterborne polyurethane coating is achieved, the filtering efficiency and precision are effectively improved, meanwhile, a scraper blade structure connected through a spring is utilized, along with rotation of the rotating shaft, the filter screens can be automatically cleaned through scraper blades, and the filtering efficiency is improved. By arranging the cleaning pipe on the outer surface of the filtering pipe and the sealing cover in threaded connection with the cleaning pipe, a user can conveniently open the cleaning pipe to treat impurities accumulated in the filtering process, and the filtering efficiency is improved. The continuous and efficient operation of the filtering device is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of waterborne polyurethane production equipment, and specifically to a filtering device for producing waterborne polyurethane coatings. Background Art

[0002] Waterborne polyurethane coating is a polyurethane resin coating that uses water as a solvent or dispersion medium. It has the advantages of being pollution-free, safe and reliable, having excellent mechanical properties, good compatibility, and being easy to modify.

[0003] An existing patent (publication number: CN205323330U) discloses impurity removal equipment for polyurethane topcoat production, relating to the technical field of production equipment. The equipment comprises a liquid storage tank and a filter tank, which includes a tank body, an indicator light, a filter disc, and a sensor. The tank body has a through-hole at the top and a groove on the bottom inner surface. The indicator light is located on the outer surface of the tank body top; the sensor is located on the inner surface of the tank body top; and the filter disc passes through the through-hole and is located in the groove. The multi-stage removable filter disc effectively reduces impurities, reduces unnecessary energy consumption, and is energy-efficient and environmentally friendly, with excellent filtration performance.

[0004] The above-mentioned impurity removal equipment is equipped with multi-stage removable filter discs, which can effectively reduce impurities, reduce unnecessary energy consumption, save energy and be environmentally friendly, and have good filtering effects. However, during use, the filter discs need to be cleaned regularly to avoid clogging of the filter discs, which is relatively cumbersome. Secondly, since the filter discs are removable, the sealing of the filter tank is reduced, and materials are easy to seep out. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the present application provides a filtering device for the production of water-based polyurethane coatings, which has advantages such as automatic cleaning and solves the problems raised in the background technology.

[0006] To achieve the above-mentioned object, the present application provides the following technical solution: a filtering device for producing waterborne polyurethane coatings, comprising a filter tube, wherein the inner wall of the filter tube is fixedly connected to three filter screens, and the interiors of the three filter screens are rotatably connected to the same rotating shaft;

[0007] Three fixing rings are fixedly connected to the outer surface of the rotating shaft, a pressure ring is provided on the left side of each fixing ring, each pressure ring is slidably connected to the rotating shaft, a spring is fixedly connected between each pressure ring and the fixing ring adjacent to it, a plurality of scrapers are fixedly connected to the outer surface of each pressure ring, each scraper is L-shaped, the right end of each scraper is in contact with the filter screen adjacent to it, and the surface of each scraper is in contact with the inner wall of the filter tube.

[0008] Through the above scheme, by setting three filter screens of different specifications on the same rotating shaft, graded filtration of water-based polyurethane coatings is achieved, which effectively improves the filtration efficiency and accuracy. At the same time, by utilizing the scraper structure connected by a spring, the scraper can automatically clean the filter screen as the rotating shaft rotates, avoiding clogging of the filter screen, slowing down the manual regular cleaning cycle, greatly simplifying the operation process, and improving production efficiency. By setting a cleaning tube and a threaded sealing cover on the outer surface of the filter tube, the user can easily open the cleaning tube to deal with impurities accumulated during the filtration process, thereby ensuring the continuous and efficient operation of the filtration device.

[0009] Furthermore, the right end of the rotating shaft is fixedly connected to a first bevel gear, the top of the right end of the filter tube is rotatably connected to a power shaft, the bottom end of the power shaft is fixedly connected to a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0010] Through the above solution and the above arrangement, power can be transmitted for the rotation of the rotating shaft.

[0011] Furthermore, the top end of the outer surface of the filter tube is fixedly connected to a plurality of cleaning tubes, and the top end of each cleaning tube is threadedly connected to a sealing cap.

[0012] Through the above solution and the provision of the cleaning tube, it is convenient for the user to process the filtered impurities.

[0013] Furthermore, a group of vibrators are installed on the outer surface of the filter tube.

[0014] Through the above solution and the provision of a vibrator, it is possible to further prevent material from adhering to the inner wall of the filter tube.

[0015] Furthermore, both ends of the filter tube are fixedly connected to a bellows.

[0016] Through the above solution, the flexible connection setting of the bellows can effectively avoid the filter tube from having a hard collision with the external tank when the filter tube vibrates, thereby improving the overall stability.

[0017] Furthermore, flanges are fixedly mounted on ends of the two bellows that are away from each other.

[0018] Through the above solution, it is convenient to connect with the external tank through the flange.

[0019] Furthermore, a directional arrow is provided on the top of the outer surface of the filter tube.

[0020] Through the above solution and the above setting, it is easy for users to distinguish the installation direction.

[0021] Furthermore, the top end of the power shaft is fixedly connected to the external motor output end.

[0022] Through the above solution, by setting up an external motor, it is possible to provide power for the rotation of the shaft.

[0023] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0024] This filtering device for producing waterborne polyurethane coatings realizes graded filtration of waterborne polyurethane coatings by arranging three filter screens of different specifications on the same rotating shaft, thereby effectively improving filtration efficiency and precision. At the same time, a scraper structure connected by a spring is utilized, and as the rotating shaft rotates, the scraper can automatically clean the filter screen, thereby avoiding clogging of the filter screen and slowing down the manual regular cleaning cycle, greatly simplifying the operation process and improving production efficiency. A cleaning tube and a threaded sealing cover provided on the outer surface of the filter tube allow the user to conveniently open the cleaning tube to process impurities accumulated during the filtration process, thereby ensuring the continuous and efficient operation of the filtering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application;

[0026] Figure 2 This is a cross-sectional view of the overall structure of this application;

[0027] Figure 3 This is the filter structure diagram for this application;

[0028] Figure 4 This is the scraper structure diagram for this application.

[0029] In the picture:

[0030] 1. Filter tube; 2. Filter screen; 3. Rotating shaft; 4. Retaining ring; 5. Pressure ring; 6. Spring; 7. Scraper; 8. First bevel gear; 9. Power shaft; 10. Second bevel gear; 11. Cleaning tube; 12. Sealing cover; 13. Vibrator; 14. Bellows; 15. Flange; 16. Pointing arrow. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] See also Figure 1 、 Figure 2 and Figure 3The filtering device for producing water-based polyurethane coating in the embodiment comprises a filtering pipe 1, three filter screens 2 fixedly connected to the inner wall of the filtering pipe 1, one same rotating shaft 3 rotatably connected to the interiors of the three filter screens 2, and the three filter screens 2 being filter screens 2 of different filtering specifications, which achieves the effect of graded filtering.

[0033] Please refer to Figure 2 , Figure 3 and Figure 4 , the outer surface of the rotating shaft 3 is fixedly connected with three fixed rings 4, the left side of each fixed ring 4 is provided with a pressure ring 5, each pressure ring 5 is slidably sleeved with the rotating shaft 3, a spring 6 is fixedly connected between each pressure ring 5 and the fixed ring 4 close to the pressure ring 5, the outer surface of each pressure ring 5 is fixedly connected with a plurality of scrapers 7, each scraper 7 is L-shaped, the right end of each scraper 7 is in contact with the filter screen 2 close to the scraper 7, and the surface of each scraper 7 is in contact with the inner wall of the filtering pipe 1. Through the arrangement of the scraper 7, the cleaning purpose of the filter screen 2 can be achieved, the filter screen 2 is prevented from being blocked, and the inside of the filtering pipe 1 can be scraped at the same time to prevent the material from adhering to the inner wall.

[0034] Please refer to Figure 2 , Figure 3 and Figure 4 , the outer surface of the filtering pipe 1 is fixedly connected with a plurality of cleaning pipes 11 at the top end, the top end of each cleaning pipe 11 is threadedly connected with a sealing cover 12, through the arrangement of the cleaning pipe 11, the user can conveniently treat the filtered impurities, the right end of the rotating shaft 3 is fixedly connected with a first bevel gear 8, the right end top of the filtering pipe 1 is rotatably connected with a power shaft 9, the bottom end of the power shaft 9 is fixedly connected with a second bevel gear 10, the first bevel gear 8 is meshingly connected with the second bevel gear 10, through the above arrangement, power can be transmitted for the rotation of the rotating shaft 3, the top end of the power shaft 9 is fixedly connected with the output end of an external motor, through the arrangement of the external motor, power can be provided for the rotation of the rotating shaft 3.

[0035] Please refer to Figure 1 , Figure 2 and Figure 3 , a group of vibrators 13 are installed on the outer surface of the filtering pipe 1, through the arrangement of the vibrator 13, the material adhering to the inner wall of the filtering pipe 1 can be further avoided, corrugated pipes 14 are fixedly connected to both ends of the filtering pipe 1, through the flexible connection arrangement of the corrugated pipes 14, the hard collision between the filtering pipe 1 and the external tank body when the filtering pipe 1 vibrates can be effectively avoided, and the stability of the whole is improved, flange plates 15 are fixedly installed at the ends of the two corrugated pipes 14 away from each other, and the flange plates 15 are convenient for being connected with the external tank body.

[0036] A filtering device for producing water-based polyurethane coatings in this embodiment realizes graded filtration of water-based polyurethane coatings by arranging three filter screens 2 of different specifications on the same rotating shaft 3, thereby effectively improving the filtration efficiency and precision. At the same time, a scraper 7 structure connected by a spring 6 is used. As the rotating shaft 3 rotates, the scraper 7 can automatically clean the filter screen 2, thereby avoiding blockage of the filter screen 2, slowing down the manual regular cleaning cycle, greatly simplifying the operation process, and improving production efficiency. By providing a cleaning tube 11 on the outer surface of the filter tube 1 and a threaded sealing cover 12, the user can easily open the cleaning tube 11 to process impurities accumulated during the filtration process, thereby ensuring the continuous and efficient operation of the filtering device.

[0037] It should be noted that when operating this device, the user should regularly check the wear of the scraper 7 and filter 2, as well as the appropriate elastic force of the spring 6, to ensure that all components are in good working condition. In addition, the cleaning tube 11 and sealing cover 12 should be opened regularly to remove accumulated impurities and maintain unobstructed flow inside the filter tube 1. The operating frequency and intensity of the vibrator 13 should be adjusted according to actual conditions to achieve the best cleaning effect.

[0038] The working principle of the above embodiment is as follows: first, the water-based polyurethane paint flows into the filter tube 1 from the inlet end of the device. Three filter screens 2 of different specifications are set inside the device. These filter screens 2 are connected and fixed to the inner wall of the filter tube 1 through the same rotating shaft 3. The paint passes through these filter screens 2 in sequence to achieve graded filtration. The filter screens 2 of different specifications can intercept impurities of different sizes to ensure the purity and quality of the paint. Through the continuous rotation of the rotating shaft 3, the scraper 7 also moves accordingly. The L-shaped design of the scraper 7 enables it to scrape the filter screen 2 and the inner wall of the filter tube 1 at the same time. This scraping action is not It can not only effectively remove impurities on the filter screen 2 to prevent clogging, but also prevent paint from adhering to the inner wall of the filter tube 1, keeping the filter tube 1 clean. The pressure ring 5 is connected to the fixed ring 4 through the spring 6. The pressure generated will cause the pressure ring 5 to move toward the filter screen 2, which can ensure that the scraper 7 always maintains close contact with the filter screen 2 to ensure the cleaning effect. The device is also equipped with a vibrator 13, which can further prevent materials from adhering to the inner wall of the filter tube 1. At the same time, the bellows 14 structure at both ends of the filter tube 1 can enhance the overall stability and avoid hard collision with the external tank during vibration.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0040] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A filtering device for producing waterborne polyurethane coatings, comprising a filter tube (1), characterized in that: Three filter screens (2) are fixedly connected to the inner wall of the filter tube (1), and the interiors of the three filter screens (2) are rotatably connected to a common rotating shaft (3); Three fixing rings (4) are fixedly connected to the outer surface of the rotating shaft (3), and a pressure ring (5) is provided on the left side of each fixing ring (4). Each pressure ring (5) is slidably sleeved with the rotating shaft (3), and a spring (6) is fixedly connected between each pressure ring (5) and the fixing ring (4) adjacent thereto. A plurality of scrapers (7) are fixedly connected to the outer surface of each pressure ring (5), and each scraper (7) is L-shaped. The right end of each scraper (7) contacts the filter screen (2) adjacent thereto, and the surface of each scraper (7) contacts the inner wall of the filter tube (1).

2. A filtering device for producing waterborne polyurethane coatings according to claim 1, characterized in that: The right end of the rotating shaft (3) is fixedly connected to a first bevel gear (8), the top of the right end of the filter tube (1) is rotatably connected to a power shaft (9), the bottom end of the power shaft (9) is fixedly connected to a second bevel gear (10), and the first bevel gear (8) is meshed with the second bevel gear (10).

3. The filtering device for producing waterborne polyurethane coatings according to claim 1, characterized in that: The top end of the outer surface of the filter tube (1) is fixedly connected to a plurality of cleaning tubes (11), and the top end of each cleaning tube (11) is threadedly connected to a sealing cover (12).

4. The filtering device for producing waterborne polyurethane coatings according to claim 1, characterized in that: A group of vibrators (13) are installed on the outer surface of the filter tube (1).

5. The filtering device for producing waterborne polyurethane coatings according to claim 1, characterized in that: Both ends of the filter tube (1) are fixedly connected to a bellows (14).

6. A filtering device for producing waterborne polyurethane coatings according to claim 5, characterized in that: A flange (15) is fixedly mounted on each of the ends of the two bellows (14) that are away from each other.

7. The filtering device for producing waterborne polyurethane coatings according to claim 1, characterized in that: A pointing arrow (16) is provided on the top of the outer surface of the filter tube (1).

8. The filtering device for producing waterborne polyurethane coatings according to claim 2, characterized in that: The top end of the power shaft (9) is fixedly connected to the external motor output end.

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