Wet screening device for powder coating

Abstract

The utility model discloses a wet screening device for powder coating, and relates to the technical field of material screening. The device comprises a screening box, a sealing cover and a cylindrical water filtering net rack, a water pump is arranged on the peripheral face of the screening box, the sealing cover is fixedly clamped to the top of the screening box, a driving motor is clamped to the center of the top of the sealing cover, the cylindrical water filtering net rack is arranged on the bottom side of the sealing cover, and a cylindrical screen rack is inserted into the inner side of the cylindrical water filtering net rack. And a material passing pipe penetrates through and is clamped in the center of the bottom of the cylindrical screen frame. By arranging the screening box, the sealing cover and the cylindrical water filtering net rack, the problems that when a wet screening device is used for screening a large amount of powder, especially in the multi-stage screening process, the powder is prone to backflow due to stirring force, and screened powder raw materials often need to be dried and then subjected to next-step processing are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of material screening, in particular to a wet screening device for powder coatings. Background Art

[0002] Powder coating is a solid powdered synthetic resin coating composed of solid resin, pigment, filler and additives. Unlike ordinary solvent-based coating and water-based coating, its dispersion medium is air instead of solvent and water. It has the characteristics of no solvent pollution, 100% film formation and low energy consumption. In the production and processing of powder coating, it is usually necessary to screen the raw materials to ensure the fineness of the raw materials. In the raw material screening process, since the raw materials of powder coating are solid powder, they are easily affected by the storage environment and cause agglomeration. Therefore, wet screening devices are often used when screening the coating. By mixing liquid, the raw materials are quickly screened to improve the screening efficiency. However, it still has the following disadvantages in actual use:

[0003] The utility model with the publication number CN219308132U discloses a wet screening vibrating screen, wherein an inspection cover is rotatably connected to the front side of the vibrating screen body, a discharge pipe is arranged on the front side of the inspection cover, a rotating pipe is inserted through the center of the upper side of the vibrating screen body, a water inlet pipe is rotatably connected to the upper end of the inner side of the rotating pipe, a plurality of groups of first screen frames and second screen frames are arranged from top to bottom on the inner side of the vibrating screen body, a group of first screen frames and second screen frames are inserted through the upper side of the water pipe, a scraper is welded and fixed on the upper end of the outer peripheral surface of the water pipe, and a water distribution pipe is inserted through the lower end of the outer peripheral surface of the water pipe. Although wet screening can prevent powder from dampening and agglomeration and improve screening efficiency, in actual use, the contact area between the powder and the screen is limited, and a large amount of powder is difficult to screen quickly. Moreover, due to the light weight of the powder, especially in the multi-stage screening process, the screened powder is easily refluxed by stirring, thereby reducing the screening efficiency.

[0004] After the powder raw materials are screened by the wet screening device, the powder raw materials often contain high moisture content and cannot be directly processed subsequently. Drying equipment is required to dry the materials before processing, which reduces the processing efficiency. Utility Model Content

[0005] The utility model aims to provide a wet screening device for powder coatings. Through a screening box, a sealing cover and a cylindrical water filter rack, the utility model solves the problem that when a wet screening device is used to screen a large amount of powder, especially in a multi-stage screening process, the powder is easily subjected to the stirring force and flows back, and the screened powder raw materials often need to be dried before the next step of processing.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a wet screening device for powder coating, comprising a screening box, a sealing cover and a cylindrical water filter grid frame, wherein a water pump is arranged on the outer peripheral surface of the screening box, a sealing cover is clamped and fixed on the top of the screening box, a driving motor is clamped on the center of the top of the sealing cover, a cylindrical water filter grid frame is arranged on the bottom side of the sealing cover, a cylindrical screen grid frame is inserted inside the cylindrical water filter grid frame, and a material passage pipe is clamped through the center of the bottom of the cylindrical screen grid frame;

[0008] The water at the bottom of the screening box can be pumped into the cylindrical water filter grid frame by a water pump to humidify the powder material, thereby preventing the powder material from agglomerating and being difficult to screen, thereby improving the screening efficiency. The driving motor can drive the cylindrical water filter grid frame and the cylindrical screen grid frame to rotate, and the powder material is moved outward by centrifugal force and screened through the cylindrical screen grid frame, while the excess water passes through the cylindrical water filter grid frame under the action of centrifugal force and flows back to the bottom of the screening box under the action of gravity. The cylindrical screen grid frame has a large screening area and can quickly screen a large area of ​​powder material. Even if multiple sizes of passable screen grid frames are set to perform multi-stage screening of the powder material, the powder material moves outward under the action of centrifugal force and is difficult to flow back under the action of stirring, thereby ensuring the screening efficiency. At the same time, the powder can be dehydrated during the screening process. After a certain period of wet screening, the humidity of the powder will not reach too high, which is convenient for rapid drying and improves the processing efficiency of the powder material.

[0009] Furthermore, a discharge pipe is welded through the outer peripheral surface of the screening box, a drainage pipe is welded through the bottom of the outer peripheral surface of the screening box, and a first solenoid valve is clamped through the outer peripheral surface of the drainage pipe;

[0010] The screened material can be discharged through the discharge pipe, and the used sewage can be discharged through the drainage pipe, which improves the convenience of using the device.

[0011] Furthermore, the water pump is inserted through the outer peripheral surface of the drain pipe, the water pump is located between the first solenoid valve and the screening box, a water pipe is inserted through the top of the water pump, and the top of the water pipe is inserted through the top of the sealing cover;

[0012] The water at the bottom of the screening box can be pumped into the cylindrical water filter grid through a water pump to humidify the powder material, prevent the powder material from agglomerating and being difficult to screen, and improve the screening efficiency.

[0013] Furthermore, a feed hopper is welded through the top of the sealing cover, a support frame is rotatably connected to the bottom of the driving motor, the support frame is inserted through the top of the sealing cover, the cylindrical water filter frame and the cylindrical screen frame are fixed to the bottom of the support frame, and the feed hopper and the water pipe are located at one end of the sealing cover and are connected through the inner side of the cylindrical screen frame;

[0014] The driving motor can drive the rotation of the cylindrical water filter frame and the cylindrical screen frame, and the powder material is moved outward by centrifugal force and sieved through the cylindrical screen frame. The excess water passes through the cylindrical water filter frame under the action of centrifugal force and flows back to the bottom of the screening box under the action of gravity, thereby improving the degree of automation of the device.

[0015] Furthermore, the feed pipe penetrates and is clamped at the bottom of the cylindrical water filter frame, the bottom of the feed pipe is slidably clamped at the inner side of the discharge pipe, the outer peripheral surface of the feed pipe penetrates and is clamped with a second solenoid valve and a third solenoid valve, the second solenoid valve is located at the outer bottom of the cylindrical screen frame, and the third solenoid valve is located at the outer bottom of the cylindrical water filter frame;

[0016] The second solenoid valve and the third solenoid valve can be provided with a protective structure to protect them from being damaged by moisture and powder particles. The cylindrical screen frame has a large screen area and can quickly screen a large area of ​​powder materials. Even if multiple sizes of pass screen frames are provided to perform multi-stage screening of powder materials, the powder materials will run outward under the action of centrifugal force and are difficult to flow back under the action of stirring, thereby ensuring the screening efficiency.

[0017] Furthermore, the outer circumference of the feed pipe is fixedly connected with a first scraper and a second scraper, and the outer circumference of the feed pipe is penetrated with a feed opening, the first scraper is attached to the inner wall of the cylindrical screen frame, the second scraper is attached to the inner wall of the cylindrical water filter frame, and the feed opening is located at the bottom of the cylindrical water filter frame;

[0018] The rotation of the cylindrical water filter frame and the cylindrical screen frame can make the second scraper and the first scraper slide on the inner wall of the cylindrical water filter frame and the cylindrical screen frame, scrape off the powder particles blocked in the cylindrical water filter frame and the cylindrical screen frame, and avoid the decrease in screening efficiency due to the blockage of the cylindrical water filter frame and the cylindrical screen frame. During the screening process, the moisture moves outward due to the centrifugal force, and the powder is dehydrated. After wet screening for a certain period of time, the humidity of the powder will not reach too high. After the screening is completed, the third solenoid valve and the second solenoid valve are opened in sequence from bottom to top, so that powder particles of different finenesses can be discharged.

[0019] The utility model has the following beneficial effects:

[0020] The utility model solves the problem that the contact area between powder and screen is limited, a large amount of powder is difficult to screen quickly, and the powder is light in weight, especially in the multi-stage screening process, the sieved powder is easily backflowed by stirring, thereby reducing the screening efficiency. The driving motor drives the rotation of the cylindrical water filter frame and the cylindrical screen frame, and the powder material moves outward by centrifugal force and is screened by the cylindrical screen frame. Even if multiple sizes of pass screen frames 302 are provided to perform multi-stage screening of the powder material, the powder material moves outward under the action of centrifugal force and is difficult to flow back under the stirring action, thereby ensuring the screening efficiency.

[0021] The utility model provides a screening box, a sealing cover and a cylindrical water filtering grid frame, thereby solving the problem that after the powder raw materials are screened by a wet screening device, the powder raw materials often contain high moisture content and cannot be directly processed subsequently, and drying equipment is required to be used to dry the materials before processing, thereby reducing the processing efficiency. The rotation of the cylindrical water filtering grid frame and the cylindrical screen grid frame can make the moisture mixed with the powder pass through the cylindrical water filtering grid frame under the action of centrifugal force and flow back to the bottom of the screening box, thereby dehydrating the powder. After a certain period of wet screening, the humidity of the powder will not reach too high, thereby reducing the time required for drying and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a structural effect diagram of the utility model;

[0024] Figure 3 This is a cross-sectional view of the screening box of the utility model;

[0025] Figure 4 This is a structural diagram of the sealing cover of the utility model;

[0026] Figure 5 It is a cross-sectional view of the cylindrical water filter rack and the cylindrical screen rack of the utility model.

[0027] Reference numerals:

[0028] 1. Screening box; 101. Water pump; 102. Discharge pipe; 103. Drain pipe; 104. First solenoid valve; 105. Water pipe; 2. Sealing cover; 201. Drive motor; 202. Feed hopper; 203. Support frame; 3. Cylindrical water filter grid; 301. Feed pipe; 302. Cylindrical screen grid; 303. Second solenoid valve; 304. Feed port; 305. Third solenoid valve; 306. First scraper; 307. Second scraper. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] See also Figure 1-5 As shown, the utility model is a wet screening device for powder coatings, comprising a screening box 1, a sealing cover 2 and a cylindrical water filter grid 3, a water pump 101 is arranged on the outer peripheral surface of the screening box 1, a sealing cover 2 is clamped and fixed on the top of the screening box 1, a driving motor 201 is clamped in the center of the top of the sealing cover 2, a cylindrical water filter grid 3 is arranged on the bottom side of the sealing cover 2, a cylindrical screen grid 302 is inserted into the inner side of the cylindrical water filter grid 3, and a material passing pipe 301 is clamped through the center of the bottom of the cylindrical screen grid 302;

[0031] The water and powder raw materials for screening are poured into the cylindrical screen frame 302 through the feed hopper 202. The water flows to the bottom of the screening box 1 under the action of gravity. The wet screening device is started. The water pump 101 pumps the water at the bottom of the screening box 1 into the cylindrical screen frame 302 to humidify the powder material to prevent the powder material from agglomerating and being difficult to screen. The driving motor 201 drives the cylindrical water filter frame 3 and the cylindrical screen frame 302 to rotate, and the powder material moves outward through the centrifugal force and passes through the cylindrical screen. The powdered raw materials are screened by the frame 302, and the excess water passes through the cylindrical water filter frame 3 under the action of centrifugal force and flows back to the bottom of the screening box 1 under the action of gravity. After screening for a certain period of time, the water pump 101 is turned off, and the driving motor 201 continues to drive the cylindrical water filter frame 3 and the cylindrical screen frame 302 to rotate to dehydrate the powdered raw materials. After a short time, the driving motor 201 is stopped and the third solenoid valve 305 and the second solenoid valve 303 are opened from bottom to top to discharge the powdered raw materials with different particle sizes.

[0032] Among them Figure 1-3 As shown, a discharge pipe 102 is welded through the outer circumference of the screening box 1, a drain pipe 103 is welded through the bottom of the outer circumference of the screening box 1, a first solenoid valve 104 is clamped through the outer circumference of the drain pipe 103, a water pump 101 is clamped through the outer circumference of the drain pipe 103, the water pump 101 is located between the first solenoid valve 104 and the screening box 1, a water pipe 105 is clamped through the top of the water pump 101, and the top of the water pipe 105 is inserted into the top of the sealing cover 2;

[0033] When screening the powder raw materials, the water pump 101 pumps water into the cylindrical screen frame 302 through the drain pipe 103 and the water pipe 105 to humidify the powder raw materials. After the powder screening is completed, the powder raw materials are discharged through the discharge pipe 102, and the first solenoid valve 104 is opened to discharge the sewage through the drain pipe 103.

[0034] Among them Figure 1 , 2As shown in 4, a feed hopper 202 is welded through the top of the sealing cover 2, and a support frame 203 is rotatably connected to the bottom of the driving motor 201. The support frame 203 is inserted through the top of the sealing cover 2, and the cylindrical water filter frame 3 and the cylindrical screen frame 302 are fixed to the bottom of the support frame 203. The feed hopper 202 and the water pipe 105 are located at one end of the sealing cover 2 and are connected to the inner side of the cylindrical screen frame 302;

[0035] Water and powder raw materials are poured into the cylindrical screen frame 302 through the feed hopper 202 for screening, and the drive motor 201 is started to drive the cylindrical water filter frame 3 and the cylindrical screen frame 302 to rotate, so that the powder moves outward under the action of centrifugal force and hits the cylindrical screen frame 302 for screening, while the excess water passes through the cylindrical water filter frame 3 under the action of centrifugal force and flows back to the bottom of the screening box 1 under the action of gravity.

[0036] Among them Figure 1 , 2 As shown in , 5, the feed pipe 301 penetrates and is clamped at the bottom of the cylindrical water filter grid 3, the bottom of the feed pipe 301 is slidably clamped at the inner side of the discharge pipe 102, the outer circumferential surface of the feed pipe 301 penetrates and is clamped with the second solenoid valve 303 and the third solenoid valve 305, the second solenoid valve 303 is located at the outer bottom of the cylindrical screen frame 302, the third solenoid valve 305 is located at the outer bottom of the cylindrical water filter grid 3, the outer circumferential surface of the feed pipe 301 is clamped and fixed with the first scraper 306 and the second scraper 307, the outer circumferential surface of the feed pipe 301 penetrates and is opened with a feed port 304, the first scraper 306 is attached to the inner wall of the cylindrical screen frame 302, the second scraper 307 is attached to the inner wall of the cylindrical water filter grid 3, and the feed port 304 is located at the inner bottom of the cylindrical water filter grid 3;

[0037] When the support frame 203 drives the cylindrical water filtration frame 3 and the cylindrical screen frame 302 to rotate, the second scraper 307 and the first scraper 306 slide on the inner walls of the cylindrical water filtration frame 3 and the cylindrical screen frame 302 to scrape off the powder particles blocked in the cylindrical water filtration frame 3 and the cylindrical screen frame 302. When the powder screening is completed, the third solenoid valve 305 and the second solenoid valve 303 are opened from bottom to top in sequence, and the powder in the cylindrical water filtration frame 3 is discharged through the feed port 304 and the feed pipe 301, and the powder in the cylindrical screen frame 302 is discharged through the feed pipe 301.

[0038] The specific working principle of the utility model is as follows: water and powder raw materials are poured into the cylindrical screen frame 302 through the feed hopper 202 for screening, the drive motor 201 is started to drive the cylindrical water filter frame 3 and the cylindrical screen frame 302 to rotate, the water pump 101 pumps water into the cylindrical screen frame 302 through the drain pipe 103 and the water pipe 105 to humidify the powder raw materials, the powder moves outward under the action of centrifugal force and hits the cylindrical screen frame 302 for screening, and the excess water passes through the cylindrical water filter frame 3 under the action of centrifugal force and flows back to the bottom of the screening box 1 under the action of gravity, and the second scraper 307 and the first scraper 3 06 Slide on the inner wall of the cylindrical water filter rack 3 and the cylindrical screen rack 302 to scrape off the powder particles blocked in the cylindrical water filter rack 3 and the cylindrical screen rack 302. When the powder screening is completed, turn off the water pump 101, and make the driving motor 201 continue to drive the cylindrical water filter rack 3 and the cylindrical screen rack 302 to rotate, so as to dehydrate the powder raw materials. After a short time, stop the driving motor 201 and open the third solenoid valve 305 and the second solenoid valve 303 from bottom to top, so that powders of different particle sizes can be discharged through the feeding pipe 301 and the discharging pipe 102, and open the first solenoid valve 104 to discharge the sewage through the drain pipe 103.

[0039] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A wet screening device for powder coatings, comprising a screening box (1), a sealing cover (2) and a cylindrical water filter rack (3), characterized in that: A water pump (101) is arranged on the outer peripheral surface of the screening box (1); a sealing cover (2) is fixedly connected to the top of the screening box (1); a driving motor (201) is connected to the center of the top of the sealing cover (2); a cylindrical water filter frame (3) is arranged on the bottom side of the sealing cover (2); a cylindrical screen frame (302) is inserted into the inner side of the cylindrical water filter frame (3); and a material passage pipe (301) is connected to the center of the bottom of the cylindrical screen frame (302).

2. A wet screening device for powder coating according to claim 1, characterized in that: A discharge pipe (102) is welded through the outer circumference of the screening box (1), a drainage pipe (103) is welded through the bottom of the outer circumference of the screening box (1), and a first solenoid valve (104) is clamped through the outer circumference of the drainage pipe (103).

3. A wet screening device for powder coating according to claim 2, characterized in that: The water pump (101) is inserted through and clamped on the outer peripheral surface of the drainage pipe (103); the water pump (101) is located between the first solenoid valve (104) and the screening box (1); a water pipe (105) is inserted through and clamped on the top of the water pump (101); and the top of the water pipe (105) is inserted through and clamped on the top of the sealing cover (2).

4. A wet screening device for powder coating according to claim 3, characterized in that: A feed hopper (202) is welded through the top of the sealing cover (2), a support frame (203) is rotatably clamped at the bottom of the driving motor (201), the support frame (203) is inserted through the top of the sealing cover (2), the cylindrical water filter frame (3) and the cylindrical screen frame (302) are clamped and fixed to the bottom of the support frame (203), and the feed hopper (202) and the water pipe (105) are located at one end of the sealing cover (2) and are connected to the inner side of the cylindrical screen frame (302).

5. A wet screening device for powder coating according to claim 2, characterized in that: The feed pipe (301) penetrates and is clamped on the bottom of the cylindrical water filter frame (3); the bottom of the feed pipe (301) is slidably clamped on the inner side of the discharge pipe (102); a second solenoid valve (303) and a third solenoid valve (305) are clamped on the outer peripheral surface of the feed pipe (301); the second solenoid valve (303) is located at the outer bottom of the cylindrical screen frame (302); and the third solenoid valve (305) is located at the outer bottom of the cylindrical water filter frame (3).

6. A wet screening device for powder coating according to claim 5, characterized in that: The outer circumferential surface of the feed pipe (301) is fixedly connected with a first scraper (306) and a second scraper (307); the outer circumferential surface of the feed pipe (301) is penetrated by a feed opening (304); the first scraper (306) is attached to the inner wall of the cylindrical screen frame (302); the second scraper (307) is attached to the inner wall of the cylindrical water filter frame (3); and the feed opening (304) is located at the inner bottom of the cylindrical water filter frame (3).

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