A rotary screening device for powder coating

Abstract

The present invention discloses a powder coating rotary screening device, which relates to the technical field of powder coating screening, and comprises a base, a screening box assembly and a feed pipe assembly. A first frame is arranged at the top outer end of the base, and a screening box assembly is arranged inside the first frame. The screening box assembly comprises a box, a rotating shaft seat, a clamping gear, an exhaust paddle, a clamping block, a first through port, a first connecting bearing seat, a screening frame, a first filter screen, a second through port, a ventilation filter cloth, a tension spring and a driven gear. The feed port of the present invention is located at a higher position inside the second funnel. Large impurities and blocks passing through the second filter screen cannot be suspended due to excessive gravity and fall into the bottom of the second funnel. Through the design of double screening, the screening effect of the equipment can be improved, and the size of the second filter screen can be increased as much as possible, which can reduce the screening pressure of the second filter screen, thereby reducing the situation where the second funnel is blocked due to excessive screening pressure.

Description

Technical Field

[0001] The invention relates to the technical field of powder coating screening, in particular to a powder coating rotary screening device. Background Art

[0002] Powder coating is a solvent-free, environmentally friendly coating. Powder coating is a solid powder coating made from raw materials such as resin, pigment, curing agent and additives through mixing, melting, extrusion, cooling, and crushing. Powder coating is widely used in various fields due to its environmental protection, high efficiency and excellent performance. After the production of powder coating is completed, it is very easy to mix with foreign matter such as metal fragments, stone particles or large agglomerates, incompletely crushed lumps, etc., which will affect the quality of powder coating. Therefore, after the production of powder coating is completed, it is usually necessary to screen it.

[0003] The common powder coating screening devices on the market are very prone to blockage. This is because the screening volume of powder coating is large, and the powder is very easy to accumulate during the screening process, causing the powder to accumulate into blocks and be unable to flow, leading to blockage. In addition, the screening filter is usually difficult to clean frequently during use, which can cause the filter to screen out too many impurities and cause blockage.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a powder coating rotary screening device is proposed. Summary of the invention

[0005] The object of the present invention is to provide a powder coating rotary screening device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a powder coating rotary screening device, comprising a base, a screening box assembly and a feed pipe assembly, wherein a first frame is arranged at the top outer end of the base, and a screening box assembly is arranged inside the first frame, the screening box assembly comprises a box body, a rotating shaft seat, a snap-on gear, an exhaust paddle, a snap-on block, a first through port, a first connecting bearing seat, a screening frame, a first filter screen, a second through port, a ventilation filter cloth, a tension spring and a driven gear, a rotating shaft seat is arranged on the inner side of the bottom of the box body, and a snap-on gear is sleeved on the outer end of the rotating shaft seat, an exhaust paddle is arranged on the top of the rotating shaft seat, and a A clamping block is provided, and a first through opening is provided at the outer end of the box body, a first connecting bearing seat is arranged at the same height as the first through opening at the outer end of the box body, a screening frame is arranged at the inner middle end of the box body, a first filter screen is arranged on the inner side of the screening frame, and a second through opening is provided at the outer end of the screening frame, a ventilation filter cloth is arranged at the bottom end of the screening frame, and a tension spring is arranged at the top outer end of the screening frame, a driven gear is arranged at the outer end of the box body, a first suction fan is arranged at the outer end of the first frame body, and a first suction pipe is connected between the first suction fan and the first connecting bearing seat, a motor is arranged inside the first frame body, and a driving gear is arranged at the output end of the motor.

[0007] Furthermore, the size, dimension and layout position of the first opening are consistent with those of the second opening, and the first opening is connected to the first air suction pipe through the first connecting bearing seat.

[0008] Furthermore, the driving gear is meshed with the driven gear, and the driven gear drives the box to rotate.

[0009] Furthermore, the outer contour size of the screening frame is consistent with the inner contour size of the box body, and the screening frame is elastically connected to the tension spring.

[0010] Furthermore, a material through pipe assembly is arranged at the inner middle end of the box body, and the material through pipe assembly includes a tube body, a feed port, a stirring paddle, a material through trough, a waste discharge trough, a first through trough, a second through trough, a third through trough, a second connecting bearing seat and a second suction pipe. A feed port is provided on the outer side of the top of the tube body, and a stirring paddle is provided on the outer end of the tube body, a material through trough is provided on the inner side of the left portion of the tube body, and a waste discharge trough is provided on the inner side of the right portion of the tube body, the right end of the tube body is provided with a first through slot, a second through slot and a third through slot in sequence from top to bottom, and a second connecting bearing seat is provided at the outer end of the tube body at the same height as the third through slot, and the outer end of the second connecting bearing seat is connected to the second suction pipe.

[0011] Furthermore, a second frame is arranged on the outer side of the top of the first frame, and a feed box is arranged on the outer side of the top of the second frame, a discharge trough is opened at the bottom end of the feed box, a first funnel is arranged at the bottom end of the feed box, and a second funnel is arranged on the inner side of the first funnel, a second filter is arranged on the inner side of the second funnel, an air pump is arranged at the outer end of the second frame, and the outer end of the air pump is connected to an air pipe, and a second suction fan is arranged at the outer end of the second frame.

[0012] Furthermore, the stirring paddle is located between the first funnel and the second funnel, and the air pump is connected to the space between the first funnel and the second funnel through the air pipe.

[0013] Furthermore, the first funnel, the second funnel and the tube body are of through-core design, and the tube body is fixedly connected to the box body.

[0014] Furthermore, the first through groove and the bottom surface of the second funnel are at the same height, and the second through groove and the bottom end of the first funnel are at the same height.

[0015] Furthermore, the third through groove is connected to the second connecting bearing seat, and the second connecting bearing seat is connected to the second suction fan through the second suction pipe.

[0016] The present invention provides a powder coating rotary screening device, which has the following beneficial effects:

[0017] 1. The present invention works by a motor, and can drive the housing to rotate by meshing the driving gear with the driven gear. Because the housing is fixed to the tube body, the tube body can drive the stirring paddle to rotate. The stirring paddle is located between the first funnel and the second funnel. The rotation of the stirring paddle can prevent the powder coating from accumulating between the first funnel and the second funnel. At this time, the air pump works to allow the high-speed airflow to enter between the first funnel and the second funnel through the air pipe. The high-speed airflow is blown and stirred to the position of the second filter screen. The second filter screen can be used to screen out larger impurities and blocks in the powder coating. The locking mechanism enables the shaft seat to drive the exhaust paddle to rotate along with the box body. During the rotation of the exhaust paddle, the suction force can be transmitted to the feed port through the ventilation filter cloth, the first filter screen, and the material trough. This enables the tube body to suck in the powder coating blown into and suspended inside the second funnel. Because the feed port is at a higher position inside the second funnel, larger impurities and blocks that pass through the second filter screen cannot be suspended due to excessive gravity and fall to the bottom of the second funnel. The double screening design can improve the screening effect of the equipment and increase the size of the second filter screen as much as possible, which can reduce the screening pressure of the second filter screen, thereby reducing the possibility of blockage of the second funnel due to excessive screening pressure.

[0018] 2. The present invention uses suction force to pull the powder coating that enters the material trough into the box body and falls into the screening frame. At this time, the box body is still in a rotating state, which makes the powder coating that falls into the screening frame move closer to the first filter screen under the influence of centrifugal force and suction force, thereby realizing the re-screening of the powder coating. Thanks to the auxiliary screening of centrifugal force and suction force, the screening efficiency of the equipment can be effectively improved. The powder coating that passes through the first filter screen will be collected at the bottom of the screening frame. Thanks to the influence of centrifugal force, the powder coating will move to the bottom edge of the screening frame, which can avoid the situation that the screening frame is blocked by the ventilation filter cloth and the suction force cannot be transmitted upward. When the amount of powder coating collected inside the screening frame increases, the weight of the screening frame will increase. This causes the screening frame to pull the tension spring to move downward. After the screening frame moves downward, the first port and the second port are connected, and the first port is connected to the first suction pipe through the first connecting bearing seat. Through the operation of the first suction fan, the powder coating that has completed screening can be sucked out of the equipment. After the powder coating is sucked out, the weight of the screening frame decreases and is pulled back by the tension spring. Through this design, the equipment can periodically complete the screening of the powder coating, which can facilitate the staff to check the powder coating that has completed screening, and then when the powder coating has a poor screening effect, the equipment can be suspended in time for maintenance, thereby ensuring the screening quality of the equipment. The three-stage long-distance screening method can effectively avoid the accumulation of powder coating during the screening process, which can improve the screening stability of the equipment.

[0019] 3. In the present invention, since the bottom surfaces of the first through slot and the second funnel are at the same height, the second through slot and the bottom ends of the first funnel are at the same height, and the bottom opening of the waste discharge slot faces the top of the screening frame, after the equipment performs screening operation for a period of time and completely empties the powder coating inside, the second suction fan can work to transmit the suction force to the inside of the third through slot through the air pipe and the second connecting bearing seat. The third through slot is connected to the first through slot, the second through slot and the waste discharge slot, so that the suction force can be transmitted to the bottom ends of the first funnel and the second funnel and the inside of the screening frame. Thanks to the ingenious design of the positions of the first through slot, the second through slot and the waste discharge slot and their integration with the pipe body, the equipment can quickly clean and collect the screened impurities without manual assistance, and the box body drives the pipe body to turn, which can expand the range of suction transmission, thereby further improving the cleaning effect of the equipment on impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a rotary screening device for powder coatings of the present invention;

[0021] Figure 2 This is a schematic diagram of the external structure of a box of a rotary screening device for powder coatings of the present invention;

[0022] Figure 3This is a schematic diagram of the internal structure of a box of a rotary screening device for powder coatings of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of a screening frame of a rotary screening device for powder coatings of the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of a second frame of a rotary screening device for powder coatings of the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of the first funnel of a rotary screening device for powder coatings of the present invention;

[0026] Figure 7 It is a schematic diagram of the overall cross-sectional structure of a rotary screening device for powder coatings of the present invention;

[0027] Figure 8 It is a schematic structural diagram of a feed pipe assembly of a rotary screening device for powder coatings of the present invention;

[0028] Fig. 9 The present invention is a schematic structural diagram of a screening box assembly of a rotary screening device for powder coatings.

[0029] In the figure: 1, base; 2, first frame; 3, screening box assembly; 301, box; 302, shaft seat; 303, snap-on gear; 304, exhaust paddle; 305, snap-on block; 306, first opening; 307, first connecting bearing seat; 308, screening frame; 309, first filter screen; 310, second opening; 311, ventilation filter cloth; 312, tension spring; 313, driven gear; 4, first suction fan; 5, first suction pipe; 6, motor; 7, driving gear ;8. Feed pipe assembly;801. Tube body;802. Feed inlet;803. Agitator;804. Feed trough;805. Waste discharge trough;806. First through trough;807. Second through trough;808. Third through trough;809. Second connecting bearing seat;810. Second air suction pipe;9. Second frame;10. Feed box;11. Discharge trough;12. First funnel;13. Second funnel;14. Second filter;15. Air pump;16. Air pipe;17. Second suction fan. DETAILED DESCRIPTION

[0030] See also Figures 1 to 9The present invention provides a technical solution: a powder coating rotary screening device, comprising a base 1, a screening box assembly 3 and a material passing pipe assembly 8, a first frame 2 is arranged at the top outer end of the base 1, and the screening box assembly 3 is arranged inside the first frame 2, the screening box assembly 3 comprises a box 301, a rotating shaft seat 302, a snap-on gear 303, an exhaust paddle 304, a snap-on block 305, a first through port 306, a first connecting bearing seat 307, a screening frame 308, a first filter screen 309, a second through port 310, a ventilation filter cloth 311, a tension spring 312 and a driven gear 313, a rotating shaft seat 302 is arranged on the inner side of the bottom of the box 301, and the outer end of the rotating shaft seat 302 is sleeved with the snap-on gear 303, the top of the rotating shaft seat 302 is arranged with an exhaust paddle 304, and the inside of the box 301 is arranged with a snap-on gear 303. Block 305, and a first opening 306 is provided at the outer end of the box body 301, a first connecting bearing seat 307 is arranged at the same height as the first opening 306 at the outer end of the box body 301, and a screening frame 308 is arranged at the middle end of the inner part of the box body 301, a first filter screen 309 is arranged on the inner side of the screening frame 308, and a second opening 310 is provided at the outer end of the screening frame 308, a ventilation filter cloth 311 is arranged at the bottom end of the screening frame 308, and a tension spring 312 is arranged at the top outer end of the screening frame 308, a driven gear 313 is arranged at the outer end of the box body 301, a first suction fan 4 is arranged at the outer end of the first frame body 2, and a first suction pipe 5 is connected between the first suction fan 4 and the first connecting bearing seat 307, a motor 6 is arranged inside the first frame body 2, and a driving gear 7 is arranged at the output end of the motor 6.

[0031] See also Figures 1 to 9The size, dimension and layout position of the first opening 306 are consistent with those of the second opening 310, and the first opening 306 is connected to the first suction pipe 5 through the first connecting bearing seat 307, the driving gear 7 is meshed with the driven gear 313, and the driven gear 313 drives the box body 301 to rotate, the outer contour size of the screening frame 308 is consistent with the inner contour size of the box body 301, and the screening frame 308 is elastically connected to the tension spring 312, and a feed pipe assembly 8 is arranged at the middle end of the inner part of the box body 301, and the feed pipe assembly 8 includes a pipe body 801, a feed inlet 802, a stirring paddle 803, a feed trough 804, and a waste discharge The tube body 801 has a first through slot 805, a second through slot 806, a second through slot 807, a third through slot 808, a second connecting bearing seat 809 and a second suction pipe 810. A feed port 802 is provided on the outside of the top of the tube body 801, and a stirring paddle 803 is provided on the outer end of the tube body 801. A material through slot 804 is provided on the inner side of the left portion of the tube body 801, and a waste discharge slot 805 is provided on the inner side of the right portion of the tube body 801. The right end of the tube body 801 has a first through slot 806, a second through slot 807 and a third through slot 808 in sequence from top to bottom, and a second connecting bearing seat 809 is provided on the outer end of the tube body 801 at the same height as the third through slot 808. 09, and the outer end of the second connecting bearing seat 809 is connected to the second suction pipe 810, the second frame 9 is arranged on the outer side of the top of the first frame 2, and the outer side of the top of the second frame 9 is provided with a feed box 10, the bottom end of the feed box 10 is provided with a discharge trough 11, the bottom end of the feed box 10 is provided with a first funnel 12, and the inner side of the first funnel 12 is provided with a second funnel 13, and the inner side of the second funnel 13 is provided with a second filter screen 14, the outer end of the second frame 9 is provided with an air delivery pump 15, and the outer end of the air delivery pump 15 is connected with an air delivery pipe 16, the outer end of the second frame 9 is provided with a second suction fan 17, and the stirring paddle 8 03 is located between the first funnel 12 and the second funnel 13, and the air pump 15 is connected to the space between the first funnel 12 and the second funnel 13 through the air pipe 16, the first funnel 12, the second funnel 13 and the tube body 801 are of through-core design, and the tube body 801 is fixedly connected to the box body 301, the first through groove 806 and the bottom surface of the second funnel 13 are at the same height, the second through groove 807 and the bottom end of the first funnel 12 are at the same height, the third through groove 808 is connected to the second connecting bearing seat 809, and the second connecting bearing seat 809 is connected to the second suction fan 17 through the second suction pipe 810;

[0032] The specific operation is as follows: the staff puts the powder coating to be screened into the feed box 10, and the powder coating inside the feed box 10 can enter the gap between the first funnel 12 and the second funnel 13 through the discharge trough 11. At this time, the motor 6 works, and the engagement of the driving gear 7 and the driven gear 313 can drive the box body 301 to rotate. Because the box body 301 is fixed to the tube body 801, the tube body 801 can drive the stirring paddle 803 to rotate. The stirring paddle 803 is located between the first funnel 12 and the second funnel 13. Through the rotation of the stirring paddle 803, the powder coating can be prevented from accumulating between the first funnel 12 and the second funnel 13. At this time, the air pump 15 works, which can make the high-speed airflow enter the first funnel 12 through the air pipe 16. Between the first funnel 12 and the second funnel 13, the stirring of 803 can be blown to the position of the second filter screen 14 by the blowing and stirring of the high-speed airflow, and the larger impurities and blocks in the powder coating can be screened out by the screening of the second filter screen 14. Because the clamping gear 303 is engaged with the clamping block 305, the rotating shaft seat 302 can drive the exhaust paddle 304 to rotate with the box body 301. During the rotation of the exhaust paddle 304, the suction force can be transmitted to the feed port 802 through the ventilation filter cloth 311, the first filter screen 309, and the feed trough 804, so that the tube body 801 can inhale the powder coating blown into the second funnel 13 and suspended. Because the feed port 802 is at a higher position inside the second funnel 13, it passes through the first funnel 13. The larger impurities and blocks on the second filter 14 cannot be suspended due to excessive gravity and fall into the bottom of the second funnel 13. The double screening design can improve the screening effect of the equipment and increase the size of the second filter 14 as much as possible, which can reduce the screening pressure of the second filter 14, thereby reducing the blockage of the second funnel 13 due to excessive screening pressure. The powder coating entering the material trough 804 can enter the interior of the box 301 and fall into the screening frame 308 through the traction of the suction force. At this time, the box 301 is still in a rotating state, which makes the powder coating falling into the screening frame 308 move closer to the first filter 309 under the influence of centrifugal force and suction force, thereby realizing the re-screening of the powder coating. Thanks to the centrifugal force and suction The auxiliary screening of force can effectively improve the screening efficiency of the equipment, and the powder coating that passes through the first filter screen 309 will be collected at the bottom of the screening frame 308. Thanks to the influence of centrifugal force, the powder coating will move to the bottom edge of the screening frame 308, which can avoid the screening frame 308 blocking the ventilation filter cloth 311 and causing the suction force to be unable to be transmitted upward. When the powder coating collected inside the screening frame 308 increases, the weight of the screening frame 308 will increase, which will cause the screening frame 308 to pull the tension spring 312 to move downward. After the screening frame 308 moves downward, the first through port 306 and the second through port 310 will be connected, and the first through port 306 is connected to the first suction pipe 5 through the first connecting bearing seat 307, and the first suction fan 4 works.The powder coating that has been screened can be sucked out of the device. After the powder coating is sucked out, the weight of the screening frame 308 decreases and is pulled back by the tension spring 312. Through this design, the device can periodically complete the screening of the powder coating, which can facilitate the staff to check the powder coating that has been screened, and then the equipment can be suspended in time for maintenance when the screening effect of the powder coating is poor, thereby ensuring the screening quality of the equipment. The three-stage long-distance screening method can effectively avoid the accumulation of powder coating during the screening process, which can improve the screening stability of the equipment. Because the first through groove 806 and the bottom surface of the second funnel 13 are at the same height, the second through groove 807 and the bottom end of the first funnel 12 are at the same height, and the bottom opening of the waste discharge groove 805 faces the top of the screening frame 308, the equipment is performing the screening operation. After the industry has been in operation for a period of time and the powder coating inside has been completely emptied, the second suction fan 17 can work to transmit the suction force to the inside of the third through slot 808 through the air pipe 16 and the second connecting bearing seat 809. The third through slot 808 is connected with the first through slot 806, the second through slot 807 and the waste discharge slot 805, so that the suction force can be transmitted to the bottom of the first funnel 12 and the second funnel 13 and the inside of the screening frame 308. Thanks to the ingenious design of the positions of the first through slot 806, the second through slot 807 and the waste discharge slot 805 and their integration with the tube body 801, the equipment can quickly clean and collect the screened impurities without manual assistance, and the box body 301 drives the tube body 801 to turn, which can expand the range of suction transmission, which further improves the cleaning effect of the equipment on impurities.

[0033] In summary, when using the powder coating rotary screening device, the staff first puts the powder coating to be screened into the feed box 10, and the powder coating inside the feed box 10 can enter the gap between the first funnel 12 and the second funnel 13 through the discharge trough 11. At this time, the motor 6 works and can drive the box body 301 to rotate through the meshing of the driving gear 7 and the driven gear 313. Because the box body 301 is fixed to the tube body 801, the tube body 801 can drive the stirring paddle 803 to rotate. The stirring paddle 803 is located between the first funnel 12 and the second funnel 13. Through the rotation of the stirring paddle 803, the powder coating can be prevented from accumulating between the first funnel 12 and the second funnel 13.

[0034] Then, the air pump 15 works, and the high-speed airflow can enter between the first funnel 12 and the second funnel 13 through the air delivery pipe 16. The high-speed airflow can blow and stir the powder coating to the position of the second filter screen 14, and the impurities and blocks with larger volume in the powder coating can be screened out through the screening of the second filter screen 14. Because the clamping gear 303 is engaged with the clamping block 305, the rotating shaft seat 302 can drive the exhaust paddle 304 to rotate with the box body 301. During the rotation of the exhaust paddle 304, the suction force can pass through the ventilation filter cloth 311 and the first filter screen 312. 09. The material trough 804 is transferred to the feed port 802, so that the tube body 801 can suck the powder coating blown into the second funnel 13 and suspended. Because the feed port 802 is located at a higher position inside the second funnel 13, the larger impurities and blocks passing through the second filter screen 14 cannot be suspended due to excessive gravity and fall to the bottom of the second funnel 13. Through the double screening design, the screening effect of the equipment can be improved, and the size of the second filter screen 14 can be increased as much as possible, which can reduce the screening pressure of the second filter screen 14, thereby reducing the blockage of the second funnel 13 due to excessive screening pressure;

[0035] Then, through the traction of the suction force, the powder coating that enters the material trough 804 can enter the interior of the box body 301 and fall into the screening frame 308. At this time, the box body 301 is still in a rotating state, which makes the powder coating that falls into the screening frame 308 move closer to the first filter screen 309 under the influence of centrifugal force and suction force, so as to realize the re-screening of the powder coating. Thanks to the auxiliary screening of centrifugal force and suction force, the screening efficiency of the equipment can be effectively improved, and the powder coating that passes through the first filter screen 309 will be collected at the bottom of the screening frame 308. Thanks to the influence of centrifugal force, the powder coating will move to the bottom edge of the screening frame 308, which can avoid the situation that the screening frame 308 blocks the ventilation filter cloth 311 and the suction force cannot be transmitted upward;

[0036] After that, as the amount of powder coating collected inside the screening frame 308 increases, the weight of the screening frame 308 increases, which causes the screening frame 308 to pull the tension spring 312 to move downward. After the screening frame 308 moves downward, the first port 306 and the second port 310 are connected, and the first port 306 is connected to the first suction pipe 5 through the first connecting bearing seat 307. Through the operation of the first suction fan 4, the powder coating that has been screened can be sucked out of the equipment. After the powder coating is sucked out, the weight of the screening frame 308 decreases and is pulled back by the tension spring 312. Through this design, the equipment can periodically complete the screening of the powder coating, which can facilitate the staff to check the powder coating that has been screened, and then the equipment can be suspended in time for maintenance when the screening effect of the powder coating is not good, thereby ensuring the screening quality of the equipment, and through the three-stage long-distance screening method, the powder coating can be effectively prevented from silting up during the screening process, which can improve the screening stability of the equipment;

[0037] Finally, the first through slot 806 is at the same height as the bottom surface of the second funnel 13, the second through slot 807 is at the same height as the bottom end of the first funnel 12, and the bottom opening of the waste discharge slot 805 is toward the top of the screening frame 308. After the equipment performs the screening operation for a period of time and the internal powder coating is completely emptied, the second suction fan 17 works to enable the suction force to be transmitted to the inner side of the third through slot 808 through the air delivery pipe 16 and the second connecting bearing seat 809. The third through slot 808 is connected to the first through slot 806 and the second through slot 807. 07 and the waste discharge trough 805, so that the suction force can be transmitted to the bottom ends of the first funnel 12 and the second funnel 13 and the inside of the screening frame 308. Thanks to the ingenious design of the positions of the first through slot 806, the second through slot 807 and the waste discharge trough 805 and their integration with the tube body 801, the equipment can quickly clean and collect the screened impurities without manual assistance, and the box body 301 drives the tube body 801 to turn, which can expand the range of suction transmission, thereby further improving the cleaning effect of the equipment on impurities.

[0038] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A powder coating rotary screening device, characterized in that: The invention comprises a base, a screening box assembly and a material passing pipe assembly, wherein a first frame is arranged at the top outer end of the base, and a screening box assembly is arranged inside the first frame, the screening box assembly comprises a box, a rotating shaft seat, a clamping gear, an exhaust paddle, a clamping block, a first opening, a first connecting bearing seat, a screening frame, a first filter screen, a second opening, a ventilation filter cloth, a tension spring and a driven gear, a rotating shaft seat is arranged on the inner side of the bottom of the box, and a clamping gear is sleeved on the outer end of the rotating shaft seat, an exhaust paddle is arranged on the top of the rotating shaft seat, a clamping block is arranged inside the box, and a first opening is provided at the outer end of the box, a first connecting bearing seat is arranged at the same height as the first opening at the outer end of the box, and a screening frame is arranged at the inner middle end of the box, a first filter screen is arranged on the inner side of the screening frame, and a second opening is provided at the outer end of the screening frame, and the bottom end of the screening frame is provided with a rotating shaft seat. A ventilation filter cloth is installed, and a tension spring is installed at the top outer end of the screening frame, a driven gear is installed at the outer end of the box body, a first suction fan is installed at the outer end of the first frame body, and a first suction pipe is connected between the first suction fan and the first connecting bearing seat, a motor is installed inside the first frame body, and a driving gear is provided at the output end of the motor, a material through pipe assembly is installed at the inner middle end of the box body, the material through pipe assembly includes a pipe body, a feed port, a stirring paddle, a material through trough, a waste discharge trough, a first through trough, a second through trough, a third through trough, a second connecting bearing seat and a second suction pipe, a feed port is opened on the outer side of the top of the pipe body, and a stirring paddle is provided on the outer end of the pipe body, a material through trough is opened on the inner side of the left part of the pipe body, and a waste discharge trough is opened on the inner side of the right part of the pipe body, and the right end of the pipe body is provided with a first through slot, a second through slot and a third through slot in sequence from top to bottom.

2. A powder coating rotary screening device according to claim 1, characterized in that: The size, dimension and layout position of the first opening are consistent with those of the second opening, and the first opening is connected to the first air suction pipe through the first connecting bearing seat.

3. A powder coating rotary screening device according to claim 2, characterized in that: The driving gear is meshed with the driven gear, and the driven gear drives the box to rotate.

4. A powder coating rotary screening device according to claim 3, characterized in that: The outer contour size of the screening frame is consistent with the inner contour size of the box body, and the screening frame is elastically connected to the tension spring.

5. A powder coating rotary screening device according to claim 4, characterized in that: A second connecting bearing seat is arranged at the outer end of the tube body at the same height as the third through slot, and the outer end of the second connecting bearing seat is connected to a second air suction pipe.

6. A powder coating rotary screening device according to claim 5, characterized in that: A second frame is arranged on the outer side of the top of the first frame, and a feed box is arranged on the outer side of the top of the second frame, a discharge trough is opened at the bottom end of the feed box, a first funnel is arranged at the bottom end of the feed box, and a second funnel is arranged on the inner side of the first funnel, a second filter is arranged on the inner side of the second funnel, an air pump is arranged on the outer end of the second frame, and an air pipe is connected to the outer end of the air pump, and a second suction fan is arranged on the outer end of the second frame.

7. A powder coating rotary screening device according to claim 6, characterized in that: The stirring paddle is located between the first funnel and the second funnel, and the air delivery pump is connected to the space between the first funnel and the second funnel through the air delivery pipe.

8. A powder coating rotary screening device according to claim 7, characterized in that: The first funnel, the second funnel and the tube body are of through-core design, and the tube body is fixedly connected to the box body.

9. A powder coating rotary screening device according to claim 8, characterized in that: The first through groove and the bottom surface of the second funnel are at the same height, and the second through groove and the bottom end of the first funnel are at the same height.

10. A powder coating rotary screening device according to claim 9, characterized in that: The third through groove is connected to the second connecting bearing seat, and the second connecting bearing seat is connected to the second suction fan through the second suction pipe.

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