An adjustable powder spray recovery system

Abstract

The present invention discloses an adjustable powder spraying recovery system, which is characterized in that it includes: a support frame; a powder recovery device, which is arranged on the upper end face of the support frame, and a filtering and grinding assembly is provided in the powder recovery device; a spray box, which is sealed and installed on the upper end face of the powder recovery device, and a regulating valve for adjusting the intermittent falling of powder is provided at the connection between the spray box and the powder recovery device, and a cleaning mechanism for cleaning the inner wall powder is provided in the spray box; a mixing box, which is sealed and installed on the upper end of the spray box; a feeding pipe, one end of which is connected to the mixing box, and the other end of which is connected to an external feeding device; and a return pipe, one end of which is assembled at the bottom end of the powder recovery device, and the other end is installed on one side of the top of the mixing box, and the return pipe is provided with a negative pressure pump for powder circulation.

Description

Technical Field

[0001] The invention relates to the technical field of powder spraying, in particular to an adjustable powder spraying recovery system. Background Art

[0002] Electrostatic powder spraying is an emerging technology that uses the principle of mutual attraction between positive and negative electrostatic charges to evenly coat the resin powder on the surface of the workpiece. Through heat treatment, a dense, high-density surface coating is formed on the surface of the workpiece. Electrostatic powder spraying can produce a high-quality surface coating with high adhesion, uniformity, tightness and no micropores, excellent corrosion resistance and electrical insulation properties. The appearance quality greatly exceeds that of traditional spray painting and baking paint processes. It is not only smooth, tough, and has a high corner coverage rate, but also because powder coating does not contain solvents, the excess powder coating can be recycled and reused, completely avoiding environmental pollution.

[0003] When general electrostatic powder spraying equipment recycles powder, powder with larger particle size is difficult to adhere to the surface of the workpiece. At the same time, some powder exists in the dead corners of the recycling system, which will lead to a decrease in the powder recovery rate.

[0004] Therefore, it is necessary to provide an adjustable powder spray recovery system to solve the problems raised in the above background technology. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solutions: an adjustable powder spray recovery system, comprising:

[0006] Support frame;

[0007] A powder recovery device is provided on the upper end surface of the support frame, wherein a filtering and grinding assembly is provided in the powder recovery device;

[0008] A spray box is sealed and mounted on the upper end surface of the powder recovery device, and a regulating valve for regulating the intermittent falling of powder is provided at the connection between the spray box and the powder recovery device, and a cleaning mechanism for cleaning the inner wall of the spray box is provided;

[0009] A mixing box, sealed and mounted on the upper end of the spraying box;

[0010] A feeding pipe, one end of which is connected to the mixing box, and the other end of which is connected to an external feeding device; and

[0011] A return pipe has one end assembled at the bottom of the powder recovery device and the other end mounted on one side of the top of the mixing box, and a negative pressure pump for powder circulation is provided on the return pipe.

[0012] Furthermore, preferably, an airflow control valve is provided in the return pipe.

[0013] Furthermore, preferably, the filtering and grinding assembly comprises:

[0014] A sealing cylinder is fixed to the upper end surface of the support frame, and a plurality of placement grooves are opened on the circumference of the inner wall of the sealing cylinder, and a plurality of lifting ears are fixed on the circumference of the inner wall of the sealing cylinder;

[0015] A first power component is disposed in the sealing cylinder; and

[0016] The second power component is arranged in the sealing cylinder and located above the first power component.

[0017] Furthermore, preferably, the first power component includes:

[0018] The electric telescopic rods are all fixed at the bottom of the placement groove, and the output ends of the electric telescopic rods are provided with extensions of support rings, and the support rings are double-layer hollow structures;

[0019] A servo motor is fixed on the support ring, and an output end of the servo motor extends into the support ring;

[0020] The filter screen is rotatably arranged in the support ring, and the filter screen is driven to rotate by the servo motor.

[0021] Furthermore, preferably, the second power component includes:

[0022] A variable frequency motor is fixed on the upper portion of the placement slot, and a gear is provided at the output end of the variable frequency motor; and

[0023] The guide ring is rotatably arranged in the plurality of lifting ears, and the guide ring is provided with a tooth portion, and the tooth portion is engaged with the gear.

[0024] Furthermore, preferably, a plurality of arc scrapers are hinged on the circumference of the upper end face of the support ring, and the arc scrapers are in contact with the filter screen, and the arc scrapers are hinged on the connecting core near the axis side, and one end of the swinging plate is movably provided on the connecting core, and the other end of the swinging plate is hinged on the extension shaft of the lower end face of the guide ring.

[0025] Furthermore, as a preference, the control valve is electrically connected to the electric telescopic rod and the variable frequency motor. Compared with the prior art, the beneficial effects of the present invention are:

[0026] In the present invention, when the guide ring rotates alternately, the swinging piece drives the multiple arc scrapers to swing alternately. During this process, when the multiple arc scrapers swing in the forward direction, the powder with larger particle size is pushed to the center of the filter screen, and the powder is ground by the mutual extrusion force; when the multiple arc scrapers swing in the reverse direction, their tips will remove the powder adhered to the adjacent arc scrapers, thereby improving the powder recovery rate.

[0027] In the present invention, when the regulating valve is in an open state, the filter screen descends synchronously with the electric telescopic rod, and the powder falling onto the filter screen will lose weight due to the same-direction movement of the filter screen, thereby reducing the probability of powder splashing and further improving the powder utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall schematic diagram of an adjustable powder spray recovery system;

[0029] Figure 2 A schematic diagram of a filter and grinding assembly of an adjustable powder spray recovery system;

[0030] Figure 3 An axonometric view of the filter and grinding assembly of an adjustable powder spray recovery system;

[0031] Figure 4 A diagram showing the status of the filter and grinding components of an adjustable powder spray recovery system;

[0032] In the figure: 1. Support frame; 2. Powder recovery device; 3. Spray box; 4. Control valve; 41. Mixing box; 5. Feed pipe; 6. Return pipe; 61. Negative pressure pump; 62. Air flow control valve; 21. Sealing cylinder; 22. Mounting groove; 23. Lifting ear; 24. Electric telescopic rod; 25. Support ring; 26. Servo motor; 27. Filter; 28. Frequency conversion motor; 201. Guide ring; 202. Arc scraper; 203. Connecting core; 204. Swinging piece. DETAILED DESCRIPTION

[0033] See also Figure 1-4 In this embodiment, an adjustable powder spray recovery system includes:

[0034] Support frame 1;

[0035] A powder recovery device 2 is provided on the upper end surface of the support frame 1, and a filtering and grinding component is provided in the powder recovery device 2;

[0036] The spray box 3 is sealed and mounted on the upper end surface of the powder recovery device 2. A regulating valve 4 for adjusting the intermittent falling of powder is provided at the connection between the spray box 3 and the powder recovery device 2. In addition, a cleaning mechanism for cleaning the inner wall of the spray box 3 is provided to improve the powder recovery rate of the spray box 3.

[0037] A mixing box 41 is sealed and mounted on the upper end of the spray box 3;

[0038] A feeding pipe 5, one end of which is connected to the mixing box 41, and the other end of which is connected to an external feeding device; and

[0039] The return pipe 6 has one end assembled at the bottom of the powder recovery device 2 and the other end mounted on one side of the top of the mixing box 41 , and a negative pressure pump 61 for powder circulation is provided on the return pipe 6 .

[0040] As a preferred embodiment, an air flow control valve 62 is provided in the return pipe 6 .

[0041] It should be noted that the airflow control valve 62 continuously changes its angle autonomously, causing the powder flow rate in the powder recovery device 2 and the return pipe 6 to continuously change. The powder in the dead corner is subjected to uneven force, which makes it easier for it to escape from the dead corner, thereby improving the recovery and utilization rate of the powder.

[0042] As a preferred embodiment, the filtering and grinding assembly includes:

[0043] The sealing cylinder 21 is fixed to the upper end surface of the support frame 1. The inner wall of the sealing cylinder 21 is provided with a plurality of placement grooves 22, and the inner wall of the sealing cylinder 21 is provided with a plurality of lifting ears 23.

[0044] A first power component is disposed in the sealing cylinder 21; and

[0045] The second power component is arranged in the sealing cylinder 21 and is located above the first power component.

[0046] As a preferred embodiment, the first power component includes:

[0047] The electric telescopic rods 24 are fixed to the bottom of the placement groove 22. The output end of the electric telescopic rod 24 is provided with an extension of the support ring 25. The support ring 25 is a double-layer hollow structure.

[0048] A servo motor 26 is fixed on the support ring 25 , and an output end of the servo motor 26 extends into the support ring 25 ;

[0049] The filter screen 27 is rotatably disposed in the support ring 25 , and the filter screen 27 is driven to rotate by the servo motor 26 .

[0050] It should be explained that when the filter screen 27 rotates, the centrifugal force is used to move the powder with larger particle size to the edge position, thereby preventing the filter screen 27 from piling up and causing blockage.

[0051] As a preferred embodiment, the second power component includes:

[0052] A variable frequency motor 28 is fixed to the upper portion of the placement slot 22, and a gear is provided at the output end of the variable frequency motor 28; and

[0053] The guide ring 201 is rotatably disposed in the plurality of lifting ears 23 . The guide ring 201 is provided with a tooth portion, and the tooth portion is engaged with the gear.

[0054] As a preferred embodiment, a plurality of arc scrapers 202 are hinged on the circumference of the upper end face of the support ring 25, and the arc scrapers 202 are in contact with the filter screen 27. The arc scrapers 202 are hinged with a connecting core 203 near the axis side, and one end of a swinging piece 204 is movably provided on the connecting core 203, and the other end of the swinging piece 204 is hinged on the extension shaft of the lower end face of the guide ring 201.

[0055] As a preferred embodiment, when the guide ring 201 rotates alternately, the swinging piece 204 drives the multiple arc scrapers 202 to swing alternately. During this process, when the multiple arc scrapers 202 swing forward, the larger particle size powder is pushed to the center of the filter 27, and the powder is ground by the mutual squeezing force; when the multiple arc scrapers 202 swing backward, their tips will remove the powder adhered to the adjacent arc scrapers 202, thereby improving the powder recovery rate.

[0056] In addition, when the multiple arc-shaped scrapers 202 swing alternately, they will always surround the powder with larger particle size, thereby improving the powder grinding efficiency.

[0057] As a preferred embodiment, the control valve 4 is electrically connected to the electric telescopic rod 24 and the variable frequency motor 28.

[0058] Specifically, in one embodiment, when the control valve 4 is in an open state, the variable frequency motor 28 is not started, and the electric telescopic rod 24 is in a continuously contracted state; when the control valve 4 is in a closed state, the variable frequency motor 28 is started, and the electric telescopic rod 24 is in a continuously expanded state;

[0059] Among them, when the control valve 4 is in the open state, the filter 27 descends synchronously with the electric telescopic rod 24. The powder falling onto the filter 27 will lose weight due to the same-direction movement of the filter 27, thereby reducing the probability of powder splashing and further improving the powder utilization rate.

[0060] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An adjustable powder spray recovery system, characterized in that: include: Support frame (1); A powder recovery device (2) is arranged on the upper end surface of the support frame (1), and a filtering and grinding component is arranged in the powder recovery device (2); A spray box (3) is sealed and mounted on the upper end surface of the powder recovery device (2); a regulating valve (4) for regulating the intermittent falling of powder is provided at the connection between the spray box (3) and the powder recovery device (2); and a cleaning mechanism for cleaning the inner wall of the spray box (3); A mixing box (41) is sealed and mounted on the upper end of the spray box (3); A feeding pipe (5), one end of which is connected to the mixing box (41), and the other end of which is connected to an external feeding device; A return pipe (6), one end of which is mounted on the bottom of the powder recovery device (2) and the other end is mounted on one side of the top of the mixing box (41), and a negative pressure pump (61) for powder circulation is provided on the return pipe (6); The filter grinding assembly comprises: A sealing cylinder (21) is fixed to the upper end surface of the support frame (1), a plurality of placement grooves (22) are provided on the circumference of the inner wall of the sealing cylinder (21), and a plurality of lifting ears (23) are fixed on the circumference of the inner wall of the sealing cylinder (21); A first power component is arranged in the sealing cylinder (21); a second power component, disposed in the sealing cylinder (21) and located above the first power component; The first power component includes: The electric telescopic rod (24) is fixed at the bottom of the placement groove (22), and the output end of the electric telescopic rod (24) is provided with an extension of the support ring (25), and the support ring (25) is a double-layer hollow structure; A servo motor (26) is fixed on the support ring (25), and an output end of the servo motor (26) extends into the support ring (25); A filter screen (27) is rotatably disposed in the support ring (25), and the filter screen (27) is driven to rotate by the servo motor (26); The second power component includes: A variable frequency motor (28) is fixed on the upper portion of the placement slot (22), and a gear is provided at the output end of the variable frequency motor (28); A guide ring (201) is rotatably arranged in the plurality of lifting ears (23), and a tooth portion is provided on the guide ring (201), and the tooth portion is engaged with the gear; The upper end surface of the support ring (25) is hinged with a plurality of arc-shaped scrapers (202) on the circumference, and the arc-shaped scrapers (202) are in contact with the filter screen (27). The arc-shaped scrapers (202) are hinged with a connecting core (203) near the axis center side, and one end of a swinging piece (204) is movably provided on the connecting core (203), and the other end of the swinging piece (204) is hinged on the extension shaft of the lower end surface of the guide ring (201).

2. The adjustable powder spray recovery system according to claim 1, characterized in that: An air flow control valve (62) is provided in the return pipe (6).

3. The adjustable powder spray recovery system according to claim 1, characterized in that: The regulating valve (4) is electrically connected to the electric telescopic rod (24) and the variable frequency motor (28).

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