A multi-stage screening apparatus for thermosetting powder coating particles

Abstract

The application discloses a multi-stage screening device for controlling thermosetting powder coating particles and relates to the technical field of powder coating screening, which comprises an outer box assembly, wherein the outer box assembly comprises a screening box. The multi-stage screening device for controlling thermosetting powder coating particles is used in the following manner: the motor is started to rotate the output shaft of the motor, and the seven transmission wheels are simultaneously rotated under the connection of the transmission belt. Six of the transmission wheels rotate to simultaneously rotate the eccentric blocks, the eccentric blocks continuously touch the reinforced frames at the corresponding positions, the screening plates continuously vibrate under the elastic action of the connecting springs, the screening effect is achieved, the screen holes on three screening plates are not the same size, the screen holes gradually increase from top to bottom, and particles of different sizes can be screened, and in addition, the vibration frequency of the reinforced frames and the screening plates can be adjusted by changing the rotating speed of the motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder coating screening, in particular to a multi-stage screening device for controlling thermosetting powder coating particles. BACKGROUND

[0002] The varieties of powder coatings can be generally divided into two categories: thermosetting and thermoplastic. Thermosetting powder coatings refer to those that use thermosetting resin as the film-forming material and add a curing agent to initiate cross-linking reactions, and after heating, they can form a hard coating that is insoluble and infusible. Even at high temperatures, the coating will not soften like a thermoplastic coating, but only decompose. Thermosetting powder coatings need to be screened for different sizes of particles and impurities during processing to facilitate spraying onto different object surfaces.

[0003] In the prior art, such as Chinese Patent No. CN112317093B, a powder coating grinding and screening device is disclosed, which relates to the field of grinding equipment and includes a housing. The lower end side wall of the housing is fixedly connected with a support, and the upper end outer side wall of the housing is fixedly installed with a driving motor. By the cooperation between the driving motor, the grinding cylinder, the spiral blade, the crushing cutter, and the screening cylinder, the coating particles are poured into the screening cylinder. The coating particles enter the grinding cylinder from the feed inlet below the grinding cylinder. Under the high-speed rotation of the spiral blade and the crushing cutter, the coating particles are crushed and upwardly conveyed and discharged. At the same time, the screening cylinder continuously rotates and screens. The coating particles smaller than the aperture mesh number of the screen are screened to the inner bottom of the housing and discharged and collected through the discharge valve. The coating particles larger than the aperture mesh number of the screen re-enter the grinding cylinder for crushing until their particle size is smaller than the aperture mesh number of the screen. The coating particles can be fully ground without manual repeated collection and pouring for repeated grinding, which is relatively convenient.

[0004] The particle sizes of thermosetting powder coatings processed are different. Different sizes of particles need to be screened and distinguished to facilitate spraying on different objects. However, the existing powder coating screening device uniformly screens and mixes all size-qualified particles together. The size of the particles cannot be controlled during screening and classification, resulting in low quality of the screened powder coating.

[0005] Therefore, a multi-stage screening device for controlling thermosetting powder coating particles is proposed to solve the above problems. SUMMARY

[0006] The present application aims to provide a multi-stage screening device for controlling thermosetting powder coating particles to solve the problem of the existing powder coating screening device that mixes all size-qualified particles together and cannot control the size of the particles during screening and classification, resulting in low quality of the screened powder coating.

[0007] In order to achieve the above object, the present application provides the following technical scheme: A thermosetting powder coating particle control multi-stage screening equipment, comprising: an outer box assembly, the outer box assembly comprising a screening box; a discharge screen plate assembly, the discharge screen plate assembly is provided with three, three discharge screen plate assemblies each comprising a discharge screen plate; a blowing assembly, the blowing assembly comprising a ventilation duct, one side of the ventilation duct is fixedly connected with three communication pipes, the air outlets of the three communication pipes are fixedly connected with three air outlet warehouses, the bottoms of the three air outlet warehouses are provided with air outlet bevels; a vibration assembly, the vibration assembly comprising seven transmission wheels, transmission belts are movably arranged between the outer surfaces of the seven transmission wheels, one side of six of the transmission wheels is fixedly installed with an I-beam, the outer surfaces of the six I-beams are fixedly installed with eccentric blocks; a screening assembly, the screening assembly is provided with three, three screening assemblies each comprising a reinforcing frame, the inner walls of the three reinforcing frames are fixedly connected with screening plates, the tops of the three screening plates are provided with a plurality of screen holes, the tops and bottoms of the three screening plates are provided with a plurality of connecting springs, one end of every two connecting springs is fixedly connected with a mounting plate.

[0008] Preferably, the top of the screening box is provided with an inlet, the top end of the inlet is fixedly installed with an inlet assembly, the inlet assembly comprises two support rods and an anti-overflow pipe, one end of the two support rods is fixedly connected with a feeding hopper, the outer surface of the anti-overflow pipe is fixedly sleeved with a limiting ring, the inside of the limiting ring is slidably embedded with a plurality of supporting rods.

[0009] Preferably, the bottoms of the plurality of supporting rods are provided with magnetic blocks, the top of the screening box is provided with an electromagnet, the tops of the plurality of supporting rods are fixedly connected with a push tube, the inner wall of the push tube is fixedly connected with an arc-shaped push block near the top, the inner wall of the push tube is slidably connected with the outer surface of the anti-overflow pipe, the top of the screening box is fixedly installed with a plurality of fixed rods, one end of the plurality of fixed rods is fixedly installed with a sealing cylinder.

[0010] Preferably, the inner walls of the plurality of sealing cylinders are slidably connected with sealing pistons, one side of the plurality of sealing pistons is fixedly installed with a movable rod, one end of the plurality of movable rods is slidably penetrated through the plurality of sealing cylinders to the outside, the other end of the plurality of movable rods is fixedly connected with an adjusting ball, the other side of the plurality of sealing pistons is provided with a limiting spring, one end of the plurality of limiting springs is fixedly connected with the inner wall of the plurality of sealing cylinders, the front surface of the screening box is provided with a current regulator near the top, the front surface of the screening box is provided with a controller near the center.

[0011] Preferably, three discharge ports are arranged on one side of the screening box, the inner walls of the three discharge ports are fixedly connected with the outer surfaces of the three discharge screens, the opposite inner walls of the three discharge ports are fixedly installed with blocking strips, and the outer surfaces of the three discharge screens are fixedly connected with stretching handles near the two side edges.

[0012] Preferably, the three communication pipes are embedded in the screening box, an auxiliary frame is fixedly installed on the other side of the screening box near the bottom, a fan is arranged on the top of the auxiliary frame, and the output end of the fan penetrates into the ventilation pipe.

[0013] Preferably, six rotating holes are arranged on the rear surface of the screening box, the inner walls of the six rotating holes are rotatably connected with the outer surfaces of the six I-beams, a limiting groove is arranged on the rear surface of the screening box, the rear surface of the screening box is provided with a motor through an auxiliary plate, the output shaft of the motor is fixedly connected with the outer surface of one side of one transmission wheel, the other outer surface of the transmission wheel is fixedly installed with a rotating block, and the outer surface of the rotating block is rotatably connected with the inner wall of the limiting groove.

[0014] Preferably, the outer surfaces of the plurality of mounting plates are fixedly connected with the inner wall of the screening box, the outer surfaces of the plurality of connecting springs are provided with folding protection pipes, one end of the plurality of folding protection pipes is fixedly connected with the outer surfaces of the plurality of mounting plates, and the other end of the plurality of folding protection pipes is fixedly connected with the outer surfaces of the two sides of the three reinforcing frames.

[0015] Preferably, the bottom of the screening box is provided with a discharging assembly, the discharging assembly comprises a discharging bin, the top of the discharging bin and the bottom of the screening box are both welded with connecting rings, and the outer surfaces of the two connecting rings are fixedly connected through bolts.

[0016] Preferably, the two sides of one of the connecting rings are welded with auxiliary handles, the bottom of the other connecting ring is welded with support frames near the two sides, the bottom of the discharging bin is fixedly connected with a discharging pipe, and the bottom of the discharging pipe is movably sleeved with a leakage-proof cover.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1、In use, by starting the motor, the output shaft of the motor is rotated, under the connection of the transmission belt, seven transmission wheels are driven to rotate, six of which will drive the eccentric blocks to rotate at the same time, the eccentric blocks will keep touching the reinforced frame at the corresponding position, under the elastic force of the connecting spring, the screening plate will keep vibrating, achieving the screening effect, the screen holes on the three screening plates are not the same size, gradually increasing from top to bottom, which can screen different size particles, in addition, by changing the speed of the motor, the vibration frequency of the reinforced frame and the screening plate can be adjusted, which can avoid the problem that all size qualified particles are mixed together and the size of the particles cannot be controlled, resulting in the problem that the quality of the screened powder coating is not high enough.

[0019] 2、In use, by starting the fan, the fan wind can be conveyed to the three air outlets through the ventilation pipeline, and then conveyed to the three air outlets, the air outlet can blow the powder coating on the corresponding screening plate forward, and the powder coating is blown out from the corresponding discharge screen plate, and three containers are used to receive them, wherein the holes on each discharge screen plate are the same size as the screen holes of the corresponding layer, and each size of particles is screened twice, making the screened powder coating more delicate and the screening effect better.

[0020] 3、In use, when feeding, the powder coating is poured into the feeding hopper, which can slow down the feeding speed and make the feeding more uniform, the controller, current regulator and electromagnet are electrically connected, so that the controller can make the electromagnet connect the power supply to generate magnetic force, thereby generating repulsive force on the magnetic block, which can push the magnetic block upward and the arc-shaped push block upward, when the arc-shaped push block contacts the adjusting ball, the adjusting ball can be pushed inward to gather, at this time, the feeding of the feeding assembly can be reduced, the current regulator can change the magnetic force of the electromagnet, thereby adjusting the distance between the adjusting balls, and changing the gap of the feeding, so that the feeding speed is controllable, avoiding the accumulation of the screening box, and the screening effect is better.

[0021] 4、In use, the support frame can support the entire screening device, the large particle powder and impurities screened to the end will be concentrated in the leakage-proof cover through the discharge bin, and the impurities can be cleaned by removing the leakage-proof cover, and the auxiliary handle is convenient for opening the outer box assembly. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of the multistage screening device for controlling the particles of thermosetting powder coating.

[0023] Figure 2 It is a rear view of the multistage screening device for controlling the particles of thermosetting powder coating.

[0024] Figure 3 Figure 1 is a perspective view of a feed assembly of a multi-stage screening apparatus for controlling thermoset powder coating particles according to the present invention;

[0025] Figure 4 Figure 2 is an exploded perspective view of an outer housing assembly of a multi-stage screening apparatus for controlling thermoset powder coating particles according to the present invention;

[0026] Figure 5 Figure 3 is a perspective view of a blow assembly of a multi-stage screening apparatus for controlling thermoset powder coating particles according to the present invention; Figure 4 Figure 4 is an enlarged view of area A in Figure 3;

[0027] Figure 6 Figure 5 is a perspective view of a vibration assembly of a multi-stage screening apparatus for controlling thermoset powder coating particles according to the present invention;

[0028] Figure 7 Figure 6 is an exploded perspective view of a screening assembly of a multi-stage screening apparatus for controlling thermoset powder coating particles according to the present invention;

[0029] Figure 8 Figure 7 is a perspective view of a screening assembly of a multi-stage screening apparatus for controlling thermoset powder coating particles according to the present invention;

[0030] Figure 9 Figure 8 is a perspective view of a multi-stage screening apparatus for controlling thermoset powder coating particles according to the present invention.

[0031] In the drawings:

[0032] 1, outer box assembly; 101, screening box; 102, discharge port; 103, feeding port; 104, limiting groove; 105, rotating hole; 2, discharging assembly; 201, discharging bin; 202, discharging pipeline; 203, auxiliary handle; 204, connecting ring; 205, support frame; 206, leak-proof cover; 3, discharge screen plate assembly; 301, discharge screen plate; 302, stretching handle; 303, blocking strip; 4, feeding assembly; 401, support rod; 402, feeding hopper; 403, electromagnet; 404, anti-overflow pipe; 405, limiting ring; 406, supporting rod; 407, magnetic block; 408, push pipe; 409, arc-shaped push block; 410, adjusting ball; 411, fixed rod; 412, sealing cylinder; 413, sealing piston; 414, movable rod; 415, limiting spring; 5, blowing assembly; 501, fan; 502, communication pipe; 503, ventilation pipeline; 504, auxiliary frame; 505, air outlet bin; 506, air outlet bevel; 6, current regulator; 7, vibration assembly; 701, motor; 702, transmission wheel; 703, transmission belt; 704, I-shaped block; 705, eccentric circular block; 706, rotating block; 8, screening assembly; 801, reinforcing frame; 802, screening plate; 803, folding protection pipe; 804, connecting spring; 805, mounting plate; 806, screen hole; 9, controller. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0034] Please refer to Figures 1-9The application provides a technical scheme: a multistage screening device for controlling thermosetting powder coating particles, which comprises an outer box assembly 1, the outer box assembly 1 comprising a screening box 101; three discharge screen plate assemblies 3, each of the three discharge screen plate assemblies 3 comprising a discharge screen plate 301; a blowing assembly 5, the blowing assembly 5 comprising a ventilation pipeline 503, one side of the ventilation pipeline 503 being fixedly connected with three communication pipes 502, the air outlets of the three communication pipes 502 being fixedly connected with three air outlet warehouses 505, and the bottoms of the three air outlet warehouses 505 being provided with air outlet bevels 506; a vibrating assembly 7, the vibrating assembly 7 comprising seven transmission wheels 702, transmission belts 703 being movably arranged between the outer surfaces of the seven transmission wheels 702, one side of each of the six transmission wheels 702 being fixedly provided with an I-beam 704, and the outer surfaces of the six I-beams 704 being fixedly provided with eccentric circular blocks 705; and three screening assemblies 8, each of the three screening assemblies 8 comprising a reinforcing frame 801, the inner walls of the three reinforcing frames 801 being fixedly connected with screening plates 802, the top of each of the three screening plates 802 being provided with a plurality of screening holes 806, and the top and the bottom of each of the three screening plates 802 being provided with a plurality of connecting springs 804, and the ends of each two connecting springs 804 being fixedly connected with mounting plates 805.

[0035] As shown in Figures 1-4 and Figure 9 , the top of the screening box 101 is provided with a feeding port 103, the top end of the feeding port 103 being fixedly provided with a feeding assembly 4, the feeding assembly 4 comprising two supporting rods 401 and an anti-overflow pipe 404, one end of the two supporting rods 401 being fixedly connected with a feeding hopper 402, the outer surface of the anti-overflow pipe 404 being fixedly provided with a limiting ring 405, the inside of the limiting ring 405 being slidably provided with a plurality of supporting rods 406, and the powder coating can be poured into the feeding hopper 402 in a conical structure, so that the feeding speed is slowed down, and a large amount of powder coating is prevented from being accumulated on the uppermost screening plate 802, the anti-overflow pipe 404 can prevent the powder coating from spilling from the side during feeding, and has good protection effect, and in addition, the supporting rod 406 slides in the limiting ring 405, so that the pushing pipe 408 has stability when moving.

[0036] As shown in Figures 1-4 and Figure 9As shown, the bottom end of the plurality of supporting rods 406 is provided with a magnetic block 407, the top of the screening box 101 is provided with an electromagnet 403, the top end of the plurality of supporting rods 406 is fixedly connected with a push tube 408, the inner wall of the push tube 408 is fixedly connected with an arc-shaped push block 409 close to the top, the inner wall of the push tube 408 is slidably connected with the outer surface of the anti-overflow pipe 404, the top of the screening box 101 is fixedly installed with a plurality of fixed rods 411, one end of the plurality of fixed rods 411 is fixedly installed with a sealing cylinder 412, the electromagnet 403 can be energized through the controller 9, the energized electromagnet 403 has a magnetic force, when installed, the opposite faces of the electromagnet 403 and the magnetic block 407 are the same magnetic poles, due to the principle of same-pole repulsion, the magnetic block 407 will generate an upward force under the repulsion of the electromagnet 403, at this time, the magnetic block 407 drives the supporting rod 406, the push tube 408 and the arc-shaped push block 409 to move upward, wherein the inner wall of the arc-shaped push block 409 is in contact with the outer side of the plurality of adjusting balls 410, in the process of moving upward, the arc-shaped push block 409 will simultaneously push the plurality of adjusting balls 410 inward.

[0037] As shown in Figures 1-4 and Figure 9 the inner wall of the plurality of sealing cylinders 412 is slidably connected with a sealing piston 413, one side of the plurality of sealing pistons 413 is fixedly installed with a movable rod 414, one end of the plurality of movable rods 414 is slidably penetrated through the plurality of sealing cylinders 412 to the outside, the other end of the plurality of movable rods 414 is fixedly connected with the adjusting ball 410, the other side of the plurality of sealing pistons 413 is provided with a limiting spring 415, one end of the plurality of limiting springs 415 is fixedly connected with the inner wall of the plurality of sealing cylinders 412, the front surface of the screening box 101 close to the top is provided with a current regulator 6, the front surface of the screening box 101 close to the center is provided with a controller 9, the magnetic force of the electromagnet 403 can be changed through the control of the controller 9 on the current regulator 6, so as to change the gap between the adjusting balls 410, and then adjust the feeding amount, when the controller 9 controls the electromagnet 403 to be de-energized, the movable rod 414 can drive the corresponding adjusting ball 410 to be pulled outward under the rebounding action of the limiting spring 415, so as to increase the gap of the feeding part, wherein the inside of the sealing cylinder 412 is filled with a liquid, which can avoid repeated bouncing of the limiting spring 415 when the electromagnet 403 is de-energized.

[0038] As shown in Figures 4-5As shown, three discharge ports 102 are formed on one side of the screening box 101, the inner walls of the three discharge ports 102 are fixedly connected with the outer surfaces of the three discharge sieve plates 301 respectively, the opposite inner walls of the three discharge ports 102 are fixedly installed with the blocking strips 303, the outer surfaces of the three discharge sieve plates 301 are fixedly connected with the stretching handles 302 near the two side edges, the blocking strips 303 can prevent the discharge sieve plates 301 from falling into the screening box 101 when being clamped and installed, and play a limiting role, and the stretching handles 302 have an auxiliary role when the discharge sieve plates 301 are installed and disassembled.

[0039] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 6 , the three communication pipes 502 are embedded in the screening box 101, the other side of the screening box 101 is fixedly installed with the auxiliary frame 504 near the bottom, the top of the auxiliary frame 504 is provided with the fan 501, the output end of the fan 501 penetrates into the ventilation pipe 503, the fan 501 can be installed on the outer surface of the screening box 101 through the auxiliary frame 504, and the wind blown by the fan 501 can be completely delivered into the ventilation pipe 503, so that the powder coating can be blown out of the corresponding discharge sieve plate 301.

[0040] As shown in Figure 7 , six rotating holes 105 are formed on the rear surface of the screening box 101, the inner walls of the six rotating holes 105 are rotatably connected with the outer surfaces of the six I-beams 704, the rear surface of the screening box 101 is provided with the motor 701 through the auxiliary plate, the output shaft of the motor 701 is fixedly connected with one side of the outer surface of one of the transmission wheels 702, the other side of the outer surface of one of the transmission wheels 702 is fixedly installed with the rotating block 706, the outer surface of the rotating block 706 is rotatably connected with the inner wall of the limiting groove 104, by starting the motor 701, the output shaft of the motor 701 is rotated, under the connection of the transmission belt 703, seven transmission wheels 702 are driven to rotate at the same time, six transmission wheels 702 will drive the eccentric circular block 705 to rotate at the same time when rotating, by changing the rotating speed of the motor 701, the vibration frequency of the reinforcing frame 801 and the screening plate 802 can be adjusted, and by rotating the rotating block 706 in the limiting groove 104, the stability of the rotation of the transmission wheel 702 can be increased.

[0041] As shown in Figure 4 , Figure 8 and Figure 9As shown, the outer surfaces of the plurality of mounting plates 805 are fixedly connected with the inner walls of the screening box 101, the outer surfaces of the plurality of connecting springs 804 are provided with folding protection tubes 803, one end of the plurality of folding protection tubes 803 is fixedly connected with the outer surfaces of the plurality of mounting plates 805, and the other end of the plurality of folding protection tubes 803 is fixedly connected with the outer surfaces of the two sides of the three reinforcing frames 801. The connecting spring 804 is wrapped by the folding protection tube 803, which can protect the connecting spring 804. The mounting arrangement of the connecting spring 804 and the mounting plate 805 is shown in the figure. In order to ensure the stability of the screening plate 802 during use, the connecting spring 804 is arranged on the upper and lower surfaces of the two sides of the reinforcing frame 801.

[0042] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 9 , the bottom of the screening box 101 is provided with a discharging assembly 2, the discharging assembly 2 comprises a discharging bin 201, the top of the discharging bin 201 and the bottom of the screening box 101 are both welded with a connecting ring 204, the outer surfaces of the two connecting rings 204 are fixedly connected by bolts, the positions of the two connecting rings 204 are corresponding, the installation of the two connecting rings 204 is completed by using the bolts, thereby completing the installation of the outer box assembly 1 and the discharging assembly 2.

[0043] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 9 Figure 1 Figure 2 Figure 4 Figure 9 , the two sides of one of the connecting rings 204 are welded with auxiliary handles 203, the bottom of the other connecting ring 204 is welded with support frames 205 near the two sides, the bottom of the discharging bin 201 is fixedly connected with a discharging pipeline 202, the bottom of the discharging pipeline 202 movably sleeves a leakage-proof cover 206, the entire device can be supported by the support frames 205, so that it can normally operate, and after the screening is completed, the leakage-proof cover 206 can be pulled out to clean the impurities.

[0044] The use method and working principle of the device: in use, first, with the help of the auxiliary handle 203, place the outer box assembly 1 and its internal components on the top of the feeding assembly 2, correspond the positions of the two connecting rings 204, install the two connecting rings 204 by using bolts, thereby completing the installation of the outer box assembly 1 and the feeding assembly 2, at this time, the entire device can be supported by the support frame 205, so that it can operate normally, pour the powder coating into the feeding hopper 402, the feeding hopper 402 is a reverse conical structure, which can slow down the feeding speed of the powder coating and prevent a large amount of material from accumulating on the first screening plate 802 in the screening box 101, at this time, electrically connect the controller 9, the current regulator 6 and the electromagnet 403, and electrically connect them with the external power supply, then, the electromagnet 403 can be energized by the controller 9, the energized electromagnet 403 has a magnetic force, during installation, the opposite faces of the electromagnet 403 and the magnetic block 407 are the same magnetic poles, due to the principle of same-pole repulsion, the magnetic block 407 will generate an upward force under the repulsive force of the electromagnet 403, at this time, the magnetic block 407 drives the supporting rod 406, the push tube 408 and the arc-shaped push block 409 to move upward, the inner wall of the arc-shaped push block 409 is in contact with the outer side of the plurality of adjusting balls 410, during upward movement, the arc-shaped push block 409 will simultaneously push the plurality of adjusting balls 410 inward, by controlling the current regulator 6 through the controller 9, the magnetic force of the electromagnet 403 can be changed, thereby the gap between the adjusting balls 410 can be changed, and then the feeding amount can be adjusted, when the controller 9 controls the electromagnet 403 to be de-energized, the limiting spring 415 can drive the corresponding adjusting ball 410 to be pulled outward under the rebounding action of the limiting spring 415, thereby increasing the gap of the feeding part, the inside of the sealing cylinder 412 is filled with liquid, which can prevent the limiting spring 415 from repeatedly rebounding when the electromagnet 403 is de-energized, when the powder coating reaches the surface of the screen hole 806, start the fan 501, the wind of the fan 501 can be conveyed to the three air outlet warehouses 505 through the ventilation pipeline 503 after passing through the ventilation pipeline 503, the air outlet warehouse 505 can blow the powder coating on the corresponding screening plate 802 forward, the inclination direction of the air outlet bevel 506 is also towards the discharge sieve plate 301, the powder coating is blown out from the corresponding discharge sieve plate 301, and three containers are used for receiving, respectively, the holes in each discharge sieve plate 301 are the same size as the screen holes 806 of the corresponding layer, and each size of particles is sieved twice, so that the sieving effect is better, when the discharge sieve plate 301 is installed, push it inward until it contacts the stop bar 303, thereby completing the clamping installation, when the discharge sieve plate 301 needs to be removed, pull it outward with the stretching handle 302, during screening, start the motor 701, the output shaft of the motor 701 rotates and simultaneously drives the seven transmission wheels 702 to rotate under the connection of the transmission belt 703,Six transmission wheels 702 rotate and drive eccentric blocks 705 to rotate, and the eccentric blocks 705 constantly touch the reinforcing frames 801 at corresponding positions, under the elastic action of the connecting springs 804, the screening plates 802 can constantly vibrate, and the screening effect is achieved, wherein the screen holes 806 on the three screening plates 802 are not the same size, gradually increasing from top to bottom, and different sizes of particles can be screened, in addition, by changing the rotating speed of the motor 701, the vibration frequency of the reinforcing frame 801 and the screening plate 802 can be adjusted, and the rotating stability of the transmission wheel 702 can be increased by rotating the rotating block 706 in the limiting groove 104, wherein the connecting spring 804 is wrapped by the folding protection pipe 803, and the connecting spring 804 is protected, the installation arrangement of the connecting spring 804 and the mounting plate 805 is shown in the figure, in order to ensure the stability of the screening plate 802 during use, the connecting springs 804 are arranged on the upper and lower surfaces of the two sides of the reinforcing frame 801, at this time, the screening of the powder coating is realized, and the effect of controlling the particle size is achieved, and after the screening is completed, the leakage-proof cover 206 is pulled out, and the impurities can be cleaned.

[0045] The wiring diagram of the electromagnet 403, the fan 501, the current regulator 6, the motor 701 and the controller 9 in the application belongs to the common knowledge in the field, and the working principle is a known technology, and the model is selected according to actual use, so the control mode and wiring arrangement of the electromagnet 403, the fan 501, the current regulator 6, the motor 701 and the controller 9 are not explained in detail.

[0046] Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A multi-stage screening apparatus for the control of thermosetting powder coating particles, characterized in that, Include: The outer box assembly (1) comprises a screening box (101); The discharge screen plate assembly (3) is provided with three, three of which comprise a discharge screen plate (301); The blowing assembly (5) comprises a ventilation duct (503), one side of the ventilation duct (503) is fixedly connected with three communication pipes (502), the air outlets of the three communication pipes (502) are fixedly connected with three air outlets (505), the bottoms of the three air outlets (505) are provided with air outlet bevels (506); The vibration assembly (7) comprises seven transmission wheels (702), the outer surfaces of the seven transmission wheels (702) are movably sleeved with a transmission belt (703), one side of six of the transmission wheels (702) is fixedly installed with an I-beam (704), the outer surfaces of the six I-beams (704) are fixedly installed with eccentric circular blocks (705); The screening assembly (8) is provided with three, three of which comprise a reinforcing frame (801), the inner walls of the three reinforcing frames (801) are fixedly connected with screening plates (802), the tops of the three screening plates (802) are provided with a plurality of screen holes (806), the tops and bottoms of the three screening plates (802) are provided with a plurality of connecting springs (804), one end of every two connecting springs (804) is fixedly connected with a mounting plate (805). The top of the screening box (101) is provided with a feeding port (103), and the top of the feeding port (103) is fixedly provided with a feeding assembly (4), which comprises two supporting rods (401) and an anti-overflow pipe (404), and the two supporting rods (401) are fixedly connected between one end of the feeding assembly (4), and the outer surface of the anti-overflow pipe (404) is fixedly provided with a limiting ring (405), and the inside of the limiting ring (405) is slidably provided with a plurality of supporting rods (406), and the bottom end of the plurality of supporting rods (406) is provided with a magnetic block (407), and the top of the screening box (101) is provided with an electromagnet (403), and the top of the plurality of supporting rods (406) is fixedly connected with a push pipe (408), and the inner wall of the push pipe (408) is fixedly connected with an arc-shaped push block (409) near the top, and the inner wall of the push pipe (408) is slidably connected with the outer surface of the anti-overflow pipe (404), and the top of the screening box (101) is fixedly provided with a plurality of fixed rods (411), and one end of the plurality of fixed rods (411) is fixedly provided with a sealing cylinder (412), and the inner wall of the plurality of sealing cylinders (412) is slidably provided with a sealing piston (413), and one side of the plurality of sealing pistons (413) is fixedly provided with a movable rod (414), and one end of the plurality of movable rods (414) is slidably penetrated through the plurality of sealing cylinders (412) to the outside, and the other end of the plurality of movable rods (414) is fixedly connected with an adjusting ball (410), and the other side of the plurality of sealing pistons (413) is provided with a limiting spring (415), and one end of the plurality of limiting springs (415) is fixedly connected with the inner wall of the plurality of sealing cylinders (412), and the front surface of the screening box (101) is provided with a current regulator (6) near the top, and the front surface of the screening box (101) is provided with a controller (9) near the center.

2. The thermosetting powder coating particle controlled multi-stage sieving apparatus according to claim 1, characterized in that: The side of the screening box (101) is provided with three discharge ports (102), and the inner wall of the three discharge ports (102) is fixedly connected with the outer surface of three discharge screens (301), and the opposite inner walls of the three discharge ports (102) are fixedly provided with a blocking strip (303), and the outer surface of the three discharge screens (301) is fixedly connected with a stretching handle (302) near the two side edges.

3. A thermosetting powder coating particle controlled multi-stage sieving apparatus according to claim 2, characterised in that: The three communication pipes (502) are embedded in the screening box (101), and the other side of the screening box (101) is fixedly provided with an auxiliary frame (504) near the bottom, and the top of the auxiliary frame (504) is provided with a fan (501), and the output end of the fan (501) penetrates into the ventilation pipe (503).

4. The thermosetting powder coating particle controlled multi-stage sieving apparatus according to claim 3, characterized in that: The rear surface of the screening box (101) is provided with six rotating holes (105), the inner walls of the six rotating holes (105) are rotatably connected with the outer surfaces of the six H-shaped blocks (704), the rear surface of the screening box (101) is provided with a limiting groove (104), and the rear surface of the screening box (101) is provided with a motor (701) through an auxiliary plate.

5. The thermosetting powder coating particle controlled multi-stage sieving apparatus according to claim 4, characterized in that: The outer surfaces of the plurality of mounting plates (805) are fixedly connected with the inner wall of the screening box (101), the outer surfaces of the plurality of connecting springs (804) are provided with folding protection tubes (803), one ends of the plurality of folding protection tubes (803) are fixedly connected with the outer surfaces of the plurality of mounting plates (805), and the other ends of the plurality of folding protection tubes (803) are fixedly connected with the outer surfaces of the two sides of the three reinforcing frames (801).

6. The thermosetting powder coating particle controlled multi-stage sieving apparatus according to claim 5, characterized in that: The bottom of the screening box (101) is provided with a discharging assembly (2), the discharging assembly (2) comprises a discharging bin (201), the top of the discharging bin (201) and the bottom of the screening box (101) are both welded with a connecting ring (204), and the outer surfaces of the two connecting rings (204) are fixedly connected through bolts.

7. The thermosetting powder coating particle controlled multi-stage sieving apparatus according to claim 6, characterized in that: The two sides of one of the connecting rings (204) are welded with auxiliary handles (203), the bottom of the other connecting ring (204) is welded with support frames (205) near the two sides, the bottom of the discharging bin (201) is fixedly communicated with a discharging pipeline (202), and the bottom of the discharging pipeline (202) movably sleeves a leakage-proof cover (206).

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