A roof cleaning mechanism for a spray device

Abstract

A top plate cleaning mechanism for a spraying device includes: a powder spraying main frame, a top plate, and a top cleaning assembly. The powder spraying main frame has a powder spraying chamber on its inner side, and the top plate is mounted on top of the powder spraying chamber. The inner diameter of the powder spraying chamber decreases from front to back, with a frame air inlet at the front and a frame air outlet at the rear. The top frame is fixed to the top plate. A top-blowing nozzle is connected to the top frame and located below the top plate, with its output end facing the frame air outlet for outputting gas towards it. This solution uses the top frame to fix the top-blowing nozzle to the top of the powder spraying chamber. The gas blown by the top-blowing nozzle can form an air curtain at the top of the powder spraying chamber, preventing powder from overflowing and adhering to the top plate. This solves the problem of powder easily accumulating at the top of existing powder spraying chambers, making powder recovery and cleaning difficult.

Description

Technical Field

[0001] This utility model relates to the field of spraying devices, and in particular to a top plate cleaning mechanism for a spraying device. Background Technology

[0002] Powder spraying guns are typically used in a spraying chamber. Some of the powder output from the gun does not adhere to the workpiece surface and instead disperses into the air. After prolonged use, residual powder may remix with new powder and be sprayed onto the workpiece surface, leading to defects such as particles, pinholes, or color differences in the coating. Furthermore, residual powder can clog the devices at the top of the spraying chamber, reducing equipment efficiency and even causing damage. Especially when powder accumulates for extended periods and becomes damp, it easily clumps together and can fall to the bottom of the spraying chamber under gravity. Powder at the top of the spraying chamber is typically difficult to clean; current technology usually involves manual cleaning after spraying, but this is costly. Additionally, the falling powder, if not promptly recovered, results in significant powder consumption. Utility Model Content

[0003] The purpose of this utility model is to provide a top plate cleaning mechanism for a spraying device. The top plate is installed on the top of the powder spraying chamber, and the top blowing nozzle is fixed to the top of the powder spraying chamber by a top frame. The gas blown out by the top blowing nozzle can form an air curtain on the top of the powder spraying chamber to prevent the powder in the powder spraying chamber from overflowing and adhering to the top plate.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A top plate cleaning mechanism for a spraying device includes: a powder spraying main frame, a top plate, and a top cleaning assembly;

[0006] The powder spraying main frame has a powder spraying chamber on its inner side, and the top plate is installed on the top of the powder spraying chamber; the inner diameter of the powder spraying chamber decreases from front to back, the front of the powder spraying chamber has a frame air inlet, and the rear of the powder spraying chamber has a frame air outlet.

[0007] The top cleaning assembly includes: a top frame and a top air nozzle;

[0008] The top frame is fixed to the top plate; the top blowing nozzle is connected to the top frame and located below the top plate, with the output end of the top blowing nozzle facing the air outlet of the frame, for outputting gas to the air outlet of the frame.

[0009] Alternatively, the top plate and the top air nozzle can be spaced apart to form a top hollow area.

[0010] Optimally, the top cleaning assembly includes: a top panel;

[0011] Multiple top panels are respectively connected to the top frame, and adjacent top panels are spaced apart; multiple top air nozzles are respectively installed on the same top panel.

[0012] Alternatively, the top cleaning assembly may further include: a top tube;

[0013] The top tube is installed on the top frame, and the top section is provided with a top air blowing channel; the top tube has multiple output ends, which are respectively connected to the top air blowing channels of the multiple top sections, and the top tube is used to output gas to the top air blowing channels; the multiple output ends of the top air blowing channels are respectively equipped with top air blowing nozzles.

[0014] Optimally, it may also include: an exhaust duct and an exhaust device;

[0015] The exhaust duct has an exhaust cavity along its height extension direction;

[0016] The side of the exhaust duct is provided with multiple exhaust ports from low to high. The exhaust duct is installed on the powder spraying main frame. The multiple exhaust ports are connected to the air outlet of the frame. The multiple exhaust ports are arranged in a straight line in sequence. The exhaust ports are the input end of the exhaust duct.

[0017] The exhaust duct has an air outlet on its side, which is the output end of the exhaust duct.

[0018] The exhaust duct has a top exhaust port on its side at the top; the top exhaust port is one of the input ends of the exhaust duct and is connected to the air outlet of the frame; the top exhaust port is located at the horizontal position of the top cleaning component; the output end of the top blowing nozzle faces the top exhaust port; the top exhaust port is aligned in a straight line with the exhaust ports of the duct arranged below; the inner diameter of the top exhaust port is larger than the inner diameter of the plurality of exhaust ports of the duct below it;

[0019] The cylinder exhaust port and the top exhaust port are respectively connected to the exhaust cavity and the cylinder exhaust port, and the input end of the exhaust device is connected to the cylinder exhaust port.

[0020] Optimally, for some adjacent sections of the cylindrical exhaust port, the inner diameter of the lower cylindrical exhaust port is larger than the inner diameter of the upper cylindrical exhaust port.

[0021] Optimally, the inner diameter of the cylindrical exhaust port is 10-90 mm, and the inner diameter of the top exhaust port is 50-70 mm.

[0022] Optimally, the exhaust duct is provided with a powder suction port at the input ends of both the top exhaust port and the duct exhaust port, and the inner diameter of the powder suction port gradually narrows from the outside to the inside.

[0023] Optimally, the two vertically distributed cylinder exhaust ports are spaced apart to form a free-air side; the cylinder exhaust port is located outside the free-air side and is horizontally aligned with the free-air side.

[0024] Optimally, the exhaust cavity has a sloping inner wall at the top, the sloping inner wall is horizontally oriented toward the top cleaning assembly, the sloping inner wall extends obliquely from the top of the exhaust cavity toward the center, and the sloping inner wall transitions from the top wall of the exhaust cavity to the side wall of the exhaust cavity.

[0025] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0026] This solution provides a top plate cleaning mechanism for a spraying device. The top plate is installed on the top of the powder spraying chamber. The top air nozzle is fixed to the top of the powder spraying chamber by a top frame. The gas blown out by the top air nozzle can form an air curtain on the top of the powder spraying chamber to prevent the powder from overflowing and adhering to the top plate. This solves the problem that powder tends to accumulate at the top of the existing powder spraying chamber, making it difficult to recover and clean the powder. Attached Figure Description

[0027] Figure 1 This is a side view of one embodiment of the powder spraying main frame at the top cleaning component;

[0028] Figure 2 This is a side view of one embodiment of the top cleaning assembly;

[0029] Figure 3 This is a top view of one embodiment of the powder spraying main frame at the top cleaning component.

[0030] Figure 4 This is a schematic diagram of the main structure of one embodiment of the exhaust duct;

[0031] Figure 5 This is a side view of one embodiment of the exhaust duct;

[0032] Figure 6 This is a top view of one embodiment of the exhaust duct.

[0033] in:

[0034] Powder coating main frame 1; Exhaust duct 02;

[0035] Powder spraying chamber 11; frame air inlet 111, frame air outlet 112;

[0036] 21. Exhaust cavity; 22. Exhaust port; 23. Clear side; 24. Exhaust outlet; 25. Top exhaust port; 26. Powder suction port; 27. Sloping inner wall of cylinder; 28. Exhaust device;

[0037] Top panel 7; Top cleaning component 8; Top openwork area 71;

[0038] Top frame 81, top air nozzle 82, top panel 83, top pipe 84; top air channel 831. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0041] like Figure 1-6 A top plate cleaning mechanism for a spraying device includes: a powder spraying main frame 1, a top plate 7, and a top cleaning component 8;

[0042] The powder spraying main frame 1 has a powder spraying chamber 11 on its inner side, and the top plate 7 is installed on the top of the powder spraying chamber 11. The inner diameter of the powder spraying chamber 11 decreases from front to back. The front of the powder spraying chamber 11 has a frame air inlet 111, and the rear of the powder spraying chamber 11 has a frame air outlet 112.

[0043] The top cleaning assembly 8 includes: a top frame 81 and a top air nozzle 82;

[0044] The top frame 81 is fixed to the top plate 7; the top blowing nozzle 82 is connected to the top frame 81 and located below the top plate 7, and the output end of the top blowing nozzle 82 faces the air outlet 112 of the frame, for outputting gas to the air outlet 112 of the frame.

[0045] This solution provides a top plate cleaning mechanism for a spraying device. The top plate 7 is installed on the top of the powder spraying chamber 11. The top air nozzle 82 is fixed to the top of the powder spraying chamber 11 by the top frame 81. The gas blown out by the top air nozzle 82 can form an air curtain on the top of the powder spraying chamber 11 to prevent the powder from overflowing and adhering to the top plate 7. This solves the problem that the powder in the existing powder spraying chamber 11 is easy to accumulate at the top position when spraying powder, which makes it difficult to recover and clean the powder.

[0046] Specifically, the powder spraying chamber 11 is used for powder spraying. The workpiece can be placed inside the powder spraying chamber 11 and sprayed using a conventional powder spraying gun. Especially during the powder spraying process, when the powder spraying gun rises to the top of the powder spraying chamber 11, the powder tends to accumulate on the top of the powder spraying chamber 11 as the airflow rises. To address this, this solution provides a top plate 7 at the top of the powder spraying chamber 11. The top plate 7 can shield the top of the powder spraying chamber 11 and can replace the top contact of the powder spraying chamber 11. A top bracket 81 can be connected to the top plate 7 and is used to fix the top blowing nozzle 82. The inner diameter of the powder spraying chamber 11 decreases from front to back, with the largest inner diameter being the frame air inlet 111 and the smallest inner diameter being the frame air outlet 11. 2. The top-blowing air nozzle 82 faces the rack outlet 112. When the top-blowing air nozzle 82 outputs gas to the rack outlet 112, the gas is output into the powder spraying chamber 11, and the gas drives the air in the powder spraying chamber 11 to be output into the rack outlet 112. Based on the shape of the powder spraying chamber 11, a negative pressure is formed in the powder spraying chamber 11 below the top plate 7. The powder spraying chamber 11 then draws in air from outside the powder spraying chamber 11 through the rack inlet 111. The air is then output to the rack outlet 112 through the gas output by the top-blowing air nozzle 82. In this way, the air and the gas output by the top-blowing air nozzle 82 together form an air curtain. The air curtain is located below the top plate 7, and the bottom surface of the top plate 7 can guide the air curtain to be output laterally into the rack outlet 112. When the scattered powder is output below the top plate 7, the air curtain can carry the powder towards the air outlet 112, thereby preventing the powder in the powder spraying chamber 11 from adhering to the top plate 7. This solves the problem that the powder in the existing powder spraying chamber 11 is easy to accumulate at the top position, making it difficult to recover and clean the powder.

[0047] Alternatively, the top plate 7 can be spaced apart from the top air nozzle 82 to form a top hollow area 71.

[0048] The top frame 81 is separated from the top blowing nozzle 82, forming a top hollow area 71. The top hollow area 71 can extend the vertical distance between the top blowing nozzle 82 and the top wall of the powder spraying chamber 11, so that there is more space above the top blowing nozzle 82 to accommodate powder. A small part of the powder is sprayed out when it is close to the top, and it may have a large flow velocity at the moment of spraying. Therefore, when this part of the powder passes upward through the top blowing nozzle 82, it will not immediately reach the top wall of the powder spraying chamber 11, but needs to pass through the top hollow area 71. When the powder passes through the top hollow area 71, when the air curtain flows towards the frame outlet 112, a negative pressure is formed at the frame outlet 112. The negative pressure can be used to slow down part of the powder in the top hollow area 71 and transfer it to the frame outlet 112.

[0049] Optimally, the top cleaning assembly 8 includes: a top portion plate 83;

[0050] Multiple top panels 83 are respectively connected to the top frame 81, and adjacent top panels 83 are spaced apart; multiple top air nozzles 82 are respectively installed on the same top panel 83.

[0051] This solution preferably uses a top panel 83 to install the top-blowing nozzles 82. The top-blowing nozzles 82 can be set at different positions on the top panel 83 as needed. The separation of the top panel 83 can avoid the spray range of the top-blowing nozzles 82 from blocking each other, ensuring that the airflow forms a continuous coverage area. Combined with the internal contour of the powder spraying chamber 11, the top-blowing nozzles 82 can be concentrated at the horizontal alignment position of the rack outlet 112. For example, the middle top panel 83 is aligned with the rack outlet 112. The middle top panel 83 can be equipped with more top-blowing nozzles 82 than other top panels 83, so that the airflow is concentrated towards the rack outlet 112.

[0052] Alternatively, the top cleaning assembly 8 may further include: a top tube 84;

[0053] The top tube 84 is installed on the top frame 81, and the top plate 83 is provided with a top air blowing channel 831; the top tube 84 has multiple output ends, which are respectively connected to the top air blowing channels 831 of the multiple top plates 83, and the top tube 84 is used to output gas to the top air blowing channels 831; the multiple output ends of the top air blowing channels 831 are respectively equipped with top air blowing nozzles 82.

[0054] Each top plate 83 is provided with a top air blowing channel 831, which serves as a conversion area for multiple top air blowing nozzles 82. This solution uses a single top pipe 84 to connect multiple top air blowing channels 831 simultaneously, directly inputting gas into the input end of the top pipe 84. The gas passes through the top air blowing channel 831, and then the top air blowing channel 831 outputs gas from different output ends through the top air blowing nozzles 82 to the powder spraying chamber 11. In this way, the air path structure at the top of the powder spraying chamber 11 is simplified and more efficient.

[0055] Optimally, it also includes: exhaust duct 02 and exhaust device 28;

[0056] The exhaust duct 02 is provided with an exhaust cavity 21 along the height extension direction;

[0057] The side of the exhaust duct 02 is provided with multiple exhaust ports 22 from low to high. The exhaust duct 02 is installed on the powder spraying main frame 1. The multiple exhaust ports 22 are connected to the air outlet 112 of the frame. The multiple exhaust ports 22 are arranged in a straight line in sequence. The exhaust ports 22 are the input ends of the exhaust duct 02.

[0058] The exhaust duct 02 is provided with an air outlet 24 on its side, and the air outlet 24 is the output end of the exhaust duct 02.

[0059] The exhaust duct 02 has a top exhaust port 25 on its side at the top; the top exhaust port 25 is one of the input ends of the exhaust duct 02 and is connected to the rack exhaust port 112. The top exhaust port 25 is located at the horizontal position of the top cleaning component 8; the output end of the top blowing nozzle 82 faces the top exhaust port 25; the top exhaust port 25 is aligned in a straight line with the exhaust ports 22 arranged below it; the inner diameter of the top exhaust port 25 is larger than the inner diameter of the plurality of exhaust ports 22 below it.

[0060] The cylindrical exhaust port 22 and the top exhaust port 25 are respectively connected to the exhaust cavity 21 and the cylindrical exhaust port 24, and the input end of the exhaust device 28 is connected to the cylindrical exhaust port 24.

[0061] The exhaust duct 02 has multiple exhaust ports 22 arranged in a straight line. Each exhaust port 22 corresponds to a horizontal area of ​​the powder spraying chamber 11. Therefore, the exhaust ports 22 are distributed from low to high, allowing them to draw in powder from different height areas of the powder spraying chamber 11. The exhaust ports 22 are connected to the exhaust cavity 21, so the powder drawn in by the exhaust ports 22 can be discharged into the exhaust cavity 21. The exhaust duct 02 also has an exhaust outlet 24, which is connected to the exhaust duct. The inner cavity 21 and the tube outlet 24 can be connected to a conventional exhaust device 28. When the exhaust device 28 is started, the input end of the exhaust device 28 draws away the gas from the tube outlet 24. The exhaust device 28 draws away the gas from the tube outlet 24, creating a negative pressure in the exhaust inner cavity 21. Under the action of the negative pressure, the exhaust inner cavity 21 draws in air from the powder spraying chamber 11 through the multi-section tube exhaust port 22. The powder is transferred from the powder spraying chamber 11 to the exhaust inner cavity 21 with the air, and then discharged through the tube outlet 24. This design includes a top exhaust port 25 above multiple linearly arranged cylindrical exhaust ports 22, located at the top of the exhaust cylinder 02. The inner diameter of the top exhaust port 25 is larger than the inner diameter of the multiple cylindrical exhaust ports 22 below it, meaning that the top exhaust port 25 can draw in more powder than the lower cylindrical exhaust ports 22. The exhaust cylinder 02 is vertically installed in the powder spraying chamber 11, drawing in powder at different heights within the powder spraying chamber 11. This increases the amount of powder drawn in near the top of the powder spraying gun within the powder spraying chamber 11, thus preventing more powder from accumulating at the top of the powder spraying chamber 11 and avoiding the problems of difficult-to-clean powder residue and increased powder consumption.

[0062] Optimally, for some adjacent sections of the cylindrical exhaust port 22, the inner diameter of the lower cylindrical exhaust port 22 is larger than the inner diameter of the upper cylindrical exhaust port 22.

[0063] The side of the exhaust duct 02 is provided with multiple sections of exhaust ports 22 from low to high. For two adjacent sections of exhaust ports 22, the inner diameter of the lower exhaust port 22 is larger than that of the upper exhaust port 22. This results in the multiple sections of exhaust ports 22 being arranged radially from small inner diameter to large inner diameter. There are larger inner diameters of the exhaust ports 22 at the bottom and top of the exhaust duct 02. Since the powder generally falls into the powder spraying chamber by its own weight... 11. The powder dispersed in the powder spraying chamber 11 is more likely to fall to the bottom of the powder spraying chamber 11 before entering the exhaust cavity 21. Therefore, the inner diameter of the relatively lower cylinder exhaust port 22 is designed to be larger, so that more powder can be sucked in from the lower part of the exhaust cavity 21 and less powder can be sucked in from the upper part of the exhaust cavity 21. Under the premise of sucking in the same amount of powder, the air volume can be reduced, so that the suction force of the exhaust is distributed at different height positions of the exhaust cavity 21. The lower the position of the cylinder exhaust port 22, the more powder is sucked in.

[0064] Optimally, the inner diameter of the cylindrical exhaust port 22 is 10–90 mm. The inner diameter of the top exhaust port 25 is 50–70 mm. This embodiment further limits the inner diameter of the cylindrical exhaust port 22 to 10–90 mm. For example, a group of multiple cylindrical exhaust ports 22 arranged from bottom to top in adjacent positions have inner diameters of 80 mm, 30 mm, and 20 mm, respectively. The inner diameter of the bottommost cylindrical exhaust port 22 is four times that of the topmost cylindrical exhaust ports 22, thus the bottommost cylindrical exhaust port 22 can draw in four times the amount of powder, thereby drawing in more powder located at the bottom. The inner diameter of the top exhaust port 25 is 50-70mm, and it can be selected as 50mm, 55mm, 60mm, 65mm, etc. as needed. Since the top exhaust port 25 is located at the top of the exhaust duct 02, its inner diameter is larger than that of the multiple exhaust ports 22 below, which can concentrate the powder located at the top of the powder spraying chamber 11 and avoid the problem of powder accumulating at the top and becoming difficult to clean.

[0065] Optimally, the exhaust duct 02 is provided with a powder suction port 26 at the input ends of both the top exhaust port 25 and the duct exhaust port 22, and the inner diameter of the powder suction port 26 gradually narrows from the outside to the inside.

[0066] The output end of the powder suction port 26 is connected to the top exhaust port 25 or the cylindrical exhaust port 22. The input end of the powder suction port 26 can be located at different heights in the powder spraying chamber 11. The inner diameter of the powder suction port 26 gradually narrows from the outside to the inside. The powder suction port 26 can have a larger inner diameter at the outermost end, so as to more easily suck up powder. The powder can be guided into the exhaust cavity 21 along the inclined surface formed inside.

[0067] Optimally, the two vertically distributed cylindrical exhaust ports 22 are spaced apart to form a free-air side 23; the cylindrical exhaust port 24 is located outside the free-air side 23, and the cylindrical exhaust port 24 is horizontally aligned with the free-air side 23.

[0068] This design cleverly incorporates a clearance side 23 between two vertically distributed cylindrical exhaust ports 22. This clearance side 23 separates two cylindrical exhaust ports 22. A cylindrical exhaust port 24 is positioned at the horizontal alignment of this clearance side 23, but it is horizontally away from the clearance side 23, meaning it is not aligned with the straight line of the cylindrical exhaust ports 22. Powder can be drawn into the exhaust cavity 21 from the cylindrical exhaust ports 22 above or below the clearance side 23. This prevents powder from being drawn into the exhaust cavity 21 from a single cylindrical exhaust port. The tube 22 and the tube outlet 24 are horizontally and linearly connected, which prevents powder from being directly discharged after passing horizontally through the tube exhaust port 22, the exhaust cavity 21 and the tube outlet 24. This also prevents the exhaust tube 02 from needing a larger air volume to suck up powder from other locations. The air volume at the input end of the exhaust tube 02 can be dispersed to the tube exhaust port 22 above and below the clearance side 23. Thus, the clearance design of the tube outlet 24 can prevent the local air volume from being too large, making it difficult for the tube exhaust port 22, which is far from the tube outlet 24, to suck up powder.

[0069] Optimally, the exhaust cavity 21 is provided with a cylindrical inclined inner wall 27 at the top, the cylindrical inclined inner wall 27 is horizontally oriented toward the top cleaning component 8, the cylindrical inclined inner wall 27 extends obliquely from the top of the exhaust cavity 21 toward the center, and the cylindrical inclined inner wall 27 transitions from the top wall of the exhaust cavity 21 to the side wall of the exhaust cavity 21.

[0070] The exhaust cavity 21 can be provided with inclined inner walls 27 at the top and bottom walls as needed, as shown in the figure. The inclined direction of the inclined inner wall 27 is: it extends inclinedly from the end of the exhaust cavity 21 towards the middle, and the inclined inner wall 27 transitions from the bottom or top wall of the exhaust cavity 21 to the side wall of the inclined inner wall 27. Therefore, the inclined inner wall 27 can shorten the horizontal distance between the top and bottom walls of the exhaust cavity 21, making the airflow smoother and making it easier to guide the powder to the cylinder outlet 24 through the inclined inner wall 27. At the same time, the inclined inner wall 27 replaces the corner position between the bottom and side walls of the exhaust cavity 21, which can avoid the corner position of the exhaust cavity 21 from accumulating powder when a large amount of powder in the top cleaning component 8 is sucked in.

[0071] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A top plate cleaning mechanism for a spraying device, characterized in that, include: Powder coating main frame, top plate, and top cleaning assembly; The powder spraying main frame has a powder spraying chamber on its inner side, and the top plate is installed on the top of the powder spraying chamber; the inner diameter of the powder spraying chamber decreases from front to back, the front of the powder spraying chamber has a frame air inlet, and the rear of the powder spraying chamber has a frame air outlet. The top cleaning assembly includes: a top frame and a top air nozzle; The top frame is fixed to the top plate; The top-blowing nozzle is connected to the top frame and located below the top plate. The output end of the top-blowing nozzle faces the air outlet of the frame and is used to output gas to the air outlet of the frame.

2. The top plate cleaning mechanism of the spraying device according to claim 1, characterized in that, The top plate is separated from the top air nozzle, forming a top hollow area.

3. The top plate cleaning mechanism of the spraying device according to claim 1, characterized in that, The top cleaning assembly includes: a top panel; Multiple top panels are respectively connected to the top frame, and adjacent top panels are spaced apart; multiple top air nozzles are respectively installed on the same top panel.

4. The top plate cleaning mechanism of the spraying device according to claim 3, characterized in that, The top cleaning assembly also includes: a top tube; The top tube is installed on the top frame, and the top section is provided with a top air blowing channel; the top tube has multiple output ends, which are respectively connected to the top air blowing channels of the multiple top sections, and the top tube is used to output gas to the top air blowing channels; the multiple output ends of the top air blowing channels are respectively equipped with top air blowing nozzles.

5. A top plate cleaning mechanism for a spraying device according to any one of claims 1-4, characterized in that, Also includes: Exhaust duct and exhaust device; The exhaust duct has an exhaust cavity along its height extension direction; The side of the exhaust duct is provided with multiple exhaust ports from low to high. The exhaust duct is installed on the powder spraying main frame. The multiple exhaust ports are connected to the air outlet of the frame. The multiple exhaust ports are arranged in a straight line in sequence. The exhaust ports are the input end of the exhaust duct. The exhaust duct has an air outlet on its side, which is the output end of the exhaust duct. The exhaust duct has a top exhaust port on its side at the top; the top exhaust port is one of the input ends of the exhaust duct and is connected to the air outlet of the frame; the top exhaust port is located at the horizontal position of the top cleaning component; the output end of the top blowing nozzle faces the top exhaust port; the top exhaust port is aligned in a straight line with the exhaust ports of the duct arranged below; the inner diameter of the top exhaust port is larger than the inner diameter of the plurality of exhaust ports of the duct below it; The cylinder exhaust port and the top exhaust port are respectively connected to the exhaust cavity and the cylinder exhaust port, and the input end of the exhaust device is connected to the cylinder exhaust port.

6. The top plate cleaning mechanism of the spraying device according to claim 5, characterized in that, In some adjacent sections of the cylindrical exhaust port, the inner diameter of the lower cylindrical exhaust port is larger than the inner diameter of the upper cylindrical exhaust port.

7. The top plate cleaning mechanism of the spraying device according to claim 6, characterized in that, The inner diameter of the cylindrical exhaust port is 10-90 mm, and the inner diameter of the top exhaust port is 50-70 mm.

8. The top plate cleaning mechanism of a spraying device according to claim 6, characterized in that, The exhaust duct has a powder suction port at the input ends of both the top exhaust port and the duct exhaust port, and the inner diameter of the powder suction port gradually narrows from the outside to the inside.

9. The top plate cleaning mechanism of a spraying device according to claim 6, characterized in that, The two vertically distributed exhaust vents of the cylinder are spaced apart to form a free-air side; the exhaust vent of the cylinder is located outside the free-air side and is horizontally aligned with the free-air side.

10. The top plate cleaning mechanism of a spraying device according to claim 9, characterized in that, The exhaust cavity has a sloping inner wall at the top, which is horizontally oriented toward the top cleaning assembly. The sloping inner wall extends obliquely from the top of the exhaust cavity toward the center, and transitions from the top wall of the exhaust cavity to the side wall of the exhaust cavity.

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