Powder filtering device for electrostatic spraying

Abstract

The utility model relates to the technical field of powder filtering for electrostatic spraying, in particular to a powder filtering device for electrostatic spraying, which comprises a support and a powder filtering sieve, the support comprises a top frame and four supporting legs, mounting plates are arranged at the bottoms of the supporting legs, and a regular octagonal spring base is arranged on the inner side of the top frame; the powder filter screen comprises a screen drum, a screen mesh is fixedly connected to a lower port of the screen drum, a spring footstock horizontally protruding outwards is arranged at the bottom of the screen drum, a plurality of vibration springs are connected between the spring footstock and a spring base, a plurality of motor bases are arranged on the circumferential outer wall of the screen drum, and vibration motors are installed on the motor bases. The top of the screen drum is rotationally connected with a lifting cover, the bottom of the screen drum is fixedly connected with a conical hopper, the bottom of the conical hopper is fixedly connected with a discharging drum, and a fan is installed in the discharging drum. The powder screening and conveying device can achieve efficient screening and automatic conveying of powder for electrostatic spraying, and is simple in structure, not prone to blockage, free of dust and environmentally friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of powder filtering for electrostatic spraying, in particular to a powder filtering device for electrostatic spraying. Background Art

[0002] Electrostatic spraying technology is a coating process widely used in many industries such as metal processing, construction, and furniture. During the electrostatic spraying process, powder coatings are adsorbed on the surface of the workpiece by electrostatic action to form a uniform and dense coating. However, in actual applications, the powder particles produced during the spraying process often contain impurities, such as particles that are too large or too small, particles that are not completely melted, and dust generated during the spraying process. These impurities not only affect the quality and performance of the coating, but may also pollute the spraying equipment and the environment.

[0003] In order to solve this problem, the prior art usually uses a powder filtering device to filter and screen the powder generated during the spraying process. However, most traditional powder filtering devices have the defect of being easily blocked, and the screen is easily blocked during the screening process, which reduces the screening efficiency and increases the difficulty of cleaning and maintenance. For example, a Chinese patent application with application number 202223081224.9 discloses an electrostatic spray powder filtering anti-blocking device. The application solves this problem by adding an additional anti-blocking device, which not only increases the production cost, but also further increases the volume of the entire device. At the same time, the external anti-blocking device will also increase the overall working failure rate of the device to a certain extent.

[0004] Therefore, there is an urgent need for a new type of powder filtering device for electrostatic spraying to provide an effective solution to the defects of the prior art. Summary of the invention

[0005] The purpose of the utility model is to provide a powder filtering device for electrostatic spraying to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A powder filtering device for electrostatic spraying, comprising a bracket and a powder filtering screen, wherein the bracket comprises a top frame and four supporting legs, a mounting plate is arranged at the bottom of the supporting legs, and a regular octagonal spring base is arranged on the inner side of the top frame;

[0008] The powder filter screen includes a sieve cylinder, a sieve is fixedly connected to the lower port of the sieve cylinder, a spring top seat protruding horizontally outward is arranged at the bottom of the sieve cylinder, a plurality of vibration springs are connected between the spring top seat and the spring base, a plurality of motor seats are arranged on the circumferential outer wall of the sieve cylinder, a vibration motor is installed on the motor seat, a lift cover is rotatably connected to the top of the sieve cylinder, a cone bucket is fixedly connected to the bottom of the sieve cylinder, a discharge cylinder is fixedly connected to the bottom of the cone bucket, and a fan is installed in the discharge cylinder.

[0009] Furthermore, the right side of the top frame is rotatably connected to the top of a pair of supporting legs on the right side, and a pair of electric telescopic rods are hinged between the pair of supporting legs on the left side and the left side of the top frame.

[0010] Furthermore, a slag outlet is provided at the bottom of the screen drum, and a sealing door is rotatably connected to the slag outlet.

[0011] Furthermore, a handle is provided at one end of the flip cover away from the rotating shaft, an air inlet hole is opened on the flip cover, and a dustproof net is installed on the air inlet hole.

[0012] Furthermore, a mounting base is fixedly connected to the center position of the discharge barrel, and the fan is fixedly mounted on the mounting base.

[0013] Furthermore, a connecting rod is welded between the circumferential outer wall of the mounting base and the circumferential inner wall of the discharge barrel, the top of the connecting rod is provided with a ridge with a center protruding upward, and the top of the mounting base is provided with a conical structure.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model drives the screen drum to vibrate at high frequency through a vibration motor, thereby realizing efficient screening of powder and improving screening efficiency; utilizing the wind force generated by the fan to blow the screened powder particles out of the discharge drum, thereby realizing automatic conveying of powder and saving labor costs; adopting a combined structure of a spring base and a vibration spring, the structure is streamlined and the failure rate is reduced. The device adopts a closed design to effectively prevent powder from overflowing. The utility model can realize efficient screening and automatic conveying of powder for electrostatic spraying, and has a streamlined structure, is not easy to clog, and is dust-free and environmentally friendly.

[0016] In the utility model, the extension of the electric telescopic rod can drive the top frame and the screen drum to tilt, and the large particles of electrostatic spraying powder retained on the screen can be poured out through the slag outlet.

[0017] In the utility model, the air inlet hole allows air flow to enter the sieve cylinder, and an air flow from top to bottom is formed in the cylinder, which is beneficial to the rapid flow of powder during the filtering process.

[0018] In the utility model, the raised ridge on the top of the connecting rod and the conical structure on the top of the mounting base can both reduce wind resistance and prevent powder accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of a powder filtering device for electrostatic spraying;

[0020] Figure 2 It is a schematic diagram of the structure of a bracket in a powder filtering device for electrostatic spraying;

[0021] Figure 3 It is a schematic diagram of the structure of a powder filtering device for electrostatic spraying after the bracket is opened;

[0022] Figure 4 It is a schematic diagram of the structure of a powder filter screen in a powder filter device for electrostatic spraying;

[0023] Figure 5 It is a schematic diagram of the structure of a cone bucket and a discharge barrel in a powder filtering device for electrostatic spraying;

[0024] Figure 6 The figure is a schematic diagram of the structure of a fan in a powder filtering device for electrostatic spraying.

[0025] In the figure: 1. bracket; 2. supporting leg; 3. mounting plate; 4. top frame; 5. spring base; 6. electric telescopic rod; 7. powder filter screen; 8. screen cylinder; 9. motor seat; 10. vibration motor; 11. screen; 12. lift cover; 13. dust net; 14. handle; 15. sealing door; 16. spring top seat; 17. vibration spring; 18. cone bucket; 19. discharge barrel; 20. mounting base; 21. fan; 22. connecting rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1: Please refer to Figures 1 to 6 A powder filtering device for electrostatic spraying includes a bracket 1 and a powder filtering screen 7. The bracket 1 includes a top frame 4 and four supporting legs 2. A mounting plate 3 is provided at the bottom of the supporting legs 2. A regular octagonal spring base 5 is provided on the inner side of the top frame 4.

[0028] The powder filter screen 7 includes a sieve cylinder 8, a sieve mesh 11 is fixedly connected to the lower port of the sieve cylinder 8, a spring top seat 16 protruding horizontally outward is arranged at the bottom of the sieve cylinder 8, a plurality of vibration springs 17 are connected between the spring top seat 16 and the spring base 5, a plurality of motor seats 9 are arranged on the circumferential outer wall of the sieve cylinder 8, a vibration motor 10 is installed on the motor seat 9, a lift cover 12 is rotatably connected to the top of the sieve cylinder 8, a cone bucket 18 is fixedly connected to the bottom of the sieve cylinder 8, a discharge cylinder 19 is fixedly connected to the bottom of the cone bucket 18, and a fan 21 is installed in the discharge cylinder 19.

[0029] Working principle of this embodiment:

[0030] The utility model is based on two core processes: vibration screening and wind conveying. When the device is started, the vibration motor 10 is fixed to the outer wall of the screen drum 8 through the motor seat 9 to generate vibration. This vibration is transmitted to the screen drum 8 through the vibration spring 17, causing the screen drum 8 and the internal screen 11 to vibrate at high frequency. The powder to be filtered is added to the screen drum 8 from the cover 12. Under the action of vibration, the powder is screened through the screen 11, and the larger particles are trapped above the screen, while the fine powder particles fall into the cone bucket 18 through the screen. The design of the cone bucket 18 enables the powder to be smoothly collected and flow to the discharge barrel 19. In the discharge barrel 19, the fan 21 is started to generate wind force to blow the fine powder particles out of the discharge barrel 19. In actual use, the discharge barrel 19 is connected to the collection bag through a corrugated hose. The collection bag is made of a filter net to ensure that the air can pass through the collection bag. The screened powder falls into the collection bag to realize the transportation of the powder. At the same time, due to the effect of wind force, a certain negative pressure is maintained inside the discharge barrel 19, which helps to prevent the powder from overflowing.

[0031] The utility model drives the screen drum to vibrate at high frequency through a vibration motor, thereby realizing efficient screening of powder and improving screening efficiency; utilizing the wind force generated by the fan to blow the screened powder particles out of the discharge drum, thereby realizing automatic conveying of powder and saving labor costs; adopting a combined structure of a spring base and a vibration spring, the structure is streamlined and the failure rate is reduced. The device adopts a closed design to effectively prevent powder from overflowing. The utility model can realize efficient screening and automatic conveying of powder for electrostatic spraying, and has a streamlined structure, is not easy to clog, and is dust-free and environmentally friendly.

[0032] Example 2: Please refer to Figures 1-2 , a powder filtering device for electrostatic spraying, which differs from Example 1 in that the right side of the top frame 4 is rotatably connected to the top of a pair of supporting legs 2 on the right side, and a pair of electric telescopic rods 6 are hinged between the pair of supporting legs 2 on the left side and the left side of the top frame 4.

[0033] In this embodiment, the extension of the electric telescopic rod 6 can drive the top frame 4 and the screen drum 8 to tilt, so as to facilitate pouring out the large particles of electrostatic spraying powder retained on the screen 11.

[0034] Example 3: Please refer to Figure 4 , a powder filtering device for electrostatic spraying, which differs from Example 2 in that a slag outlet is provided at the bottom of the sieve drum 8, and a sealing door 15 is rotatably connected to the slag outlet.

[0035] In this embodiment, after the electric telescopic rod 6 is extended to drive the screen drum 8 to tilt, the large particles of electrostatic spray powder retained on the screen 11 are poured out through the slag outlet, and the sealing door 15 is closed when the powder is normally filtered. The sealing door 15 can adopt an electromagnet magnetic attraction structure, which is easy to open and close, has high stability, and will not be opened by mistake due to vibration.

[0036] Example 4: Please refer to Figure 4 , a powder filtering device for electrostatic spraying, which differs from Example 1 in that a handle 14 is provided at one end of a flip cover 12 away from the rotating shaft, an air inlet is opened on the flip cover 12, and a dustproof net 13 is installed on the air inlet.

[0037] In this embodiment, the air inlet hole allows air to enter the sieve cylinder 8, forming an airflow from top to bottom in the cylinder, which is conducive to the rapid flow of powder during the filtration process; the dustproof net 13 is used to limit external dust from entering the sieve cylinder 8. When performing powder filtering, the device should be operated in a dust-free room.

[0038] Example 5: Please refer to Figures 5-6 , a powder filtering device for electrostatic spraying, which differs from Example 1 in that a mounting base 20 is fixedly connected to the center position of a discharge barrel 19 , and a fan 21 is fixedly mounted on the mounting base 20 .

[0039] In this embodiment, the mounting base 20 provides a mounting position for the fan.

[0040] Example 6: Please refer to Figure 6 , a powder filtering device for electrostatic spraying, which differs from Example 5 in that a connecting rod 22 is welded between the circumferential outer wall of the mounting base 20 and the circumferential inner wall of the discharge barrel 19, and a ridge with a center protruding upward is provided on the top of the connecting rod 22, and the top of the mounting base 20 is set as a conical structure.

[0041] In this embodiment, the raised ridge on the top of the connecting rod 22 and the conical structure on the top of the mounting base 20 can both reduce wind resistance and prevent powder accumulation.

Claims

1. A powder filtering device for electrostatic spraying, comprising a support (1) and a powder filtering screen (7), characterized in that: The bracket (1) comprises a top frame (4) and four supporting legs (2); a mounting plate (3) is provided at the bottom of the supporting legs (2); and a regular octagonal spring base (5) is provided on the inner side of the top frame (4); The powder filter screen (7) comprises a sieve cylinder (8), a sieve (11) is fixedly connected to the lower port of the sieve cylinder (8), a spring top seat (16) protruding horizontally outward is arranged at the bottom of the sieve cylinder (8), a plurality of vibration springs (17) are connected between the spring top seat (16) and the spring base (5), a plurality of motor seats (9) are arranged on the circumferential outer wall of the sieve cylinder (8), a vibration motor (10) is installed on the motor seat (9), a lift cover (12) is rotatably connected to the top of the sieve cylinder (8), a cone bucket (18) is fixedly connected to the bottom of the sieve cylinder (8), a discharge cylinder (19) is fixedly connected to the bottom of the cone bucket (18), a fan (21) is installed in the discharge cylinder (19).

2. A powder filtering device for electrostatic spraying according to claim 1, characterized in that: The right side of the top frame (4) is rotatably connected to the top of a pair of supporting legs (2) on the right side, and a pair of electric telescopic rods (6) are hinged between the pair of supporting legs (2) on the left side and the left side of the top frame (4).

3. A powder filter device for electrostatic spraying according to claim 2, characterized in that: The bottom of the screen drum (8) is provided with a slag outlet, and a sealing door (15) is rotatably connected to the slag outlet.

4. The powder filtering device for electrostatic spraying according to claim 1, characterized in that: A handle (14) is provided at one end of the flip cover (12) away from the rotating shaft, and an air inlet hole is provided on the flip cover (12), and a dustproof net (13) is installed on the air inlet hole.

5. The powder filtering device for electrostatic spraying according to claim 1, characterized in that: The discharging cylinder (19) is fixedly connected to a mounting base (20) at the center position, and the fan (21) is fixedly mounted on the mounting base (20).

6. A powder filtering device for electrostatic spraying according to claim 5, characterized in that: A connecting rod (22) is welded between the circumferential outer wall of the mounting base (20) and the circumferential inner wall of the discharge barrel (19), and a ridge with a center protruding upward is provided on the top of the connecting rod (22). The top of the mounting base (20) is provided as a conical structure.

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