Paint spraying device for butterfly valve machining

Abstract

The invention belongs to the technical field of butterfly valve surface treatment, particularly relates to a paint spraying device for butterfly valve processing, and provides the following scheme aiming at the problems of single paint spraying angle, limited paint spraying range and insufficient paint mist pollution control in the background technology: the paint spraying device comprises a paint spraying table, and a butterfly valve positioning platform is arranged on the outer wall of the top of the paint spraying table; a mist suction main pipe is welded to the center of the bottom of the butterfly valve positioning platform, and a rotating shaft is arranged on one side of the mist suction main pipe. A transmission structure of a worm gear and a worm is combined with a first connecting rod and a second connecting rod to drive a paint spraying pipe to move in multiple degrees of freedom in the horizontal direction and the vertical direction, all-directional covering paint spraying of the inner surface and the outer surface of a valve body and the flange edge of the valve body is achieved, and the main mist suction pipe and the auxiliary mist suction pipe are designed into an inner cover and an outer cover and cover the inner area and the outer area of the valve body correspondingly. The mist absorbing range is synchronously adjusted along with the position of the atomizing nozzle, so that the paint mist capturing efficiency can be improved, and the environmental pollution and raw material waste are effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of butterfly valve surface treatment, in particular to a paint spraying device for butterfly valve processing. Background Art

[0002] The butterfly valve is a fluid control device widely used in industrial piping systems. Its core structure is a disc-shaped valve plate, which opens and closes the pipeline by rotating around the axis. Butterfly valves have the advantages of compact structure, rapid opening and closing, and low flow resistance. They are widely used in the fields of petroleum, chemical industry, electric power, water supply and drainage, etc. Because butterfly valves are exposed to complex working conditions (such as corrosive media, high temperature, high pressure, etc.) for a long time, their surfaces are easily corroded, resulting in reduced sealing performance and shortened service life. Therefore, surface painting treatment has become an indispensable part of butterfly valve manufacturing. Painting can not only form an anti-corrosion protective layer, but also improve the appearance quality to meet the use requirements in different environments. However, the special structure of the butterfly valve (such as the disc-shaped valve plate, flange connection parts, etc.) places high demands on the painting process, and it is necessary to ensure that the coating is evenly covered and there are no dead angles.

[0003] Traditional butterfly valve painting devices mostly use fixed spray guns or manual spraying methods, which have the following significant defects:

[0004] Single spraying angle: Fixed spray guns can only spray in a single direction, resulting in incomplete coverage of complex areas such as valve plate edges and flange connections, which can easily lead to spray leaks or uneven coating thickness.

[0005] Limited painting range: Manual or semi-automatic equipment relies on the operator's experience to adjust the painting trajectory, which is inefficient and inconsistent, making it difficult to adapt to mass production needs.

[0006] Inadequate control of paint mist pollution: Paint mist generated during the spraying process easily spreads into the environment, endangering the health of operators and wasting raw materials. Existing mist extraction systems often use fixed air intakes that cannot move synchronously with the spray head, resulting in low mist extraction efficiency. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the present invention provides a paint spraying device for butterfly valve processing, which overcomes the shortcomings of the existing technology and effectively solves the problems of single paint spraying angle, limited paint spraying range and insufficient paint mist pollution control.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A paint spraying device for butterfly valve processing includes a paint spraying table, a butterfly valve positioning platform is provided on the top outer wall of the paint spraying table, and a mist suction pipe is welded at the bottom center of the butterfly valve positioning platform, a rotating shaft is provided on one side of the mist suction pipe, and a pulley pair is installed between the mist suction pipe and the rotating shaft, the bottom outer wall of the rotating shaft is fixedly connected to a servo motor through a coupling, a vertical plate is welded on the top outer wall of the paint spraying table, and the vertical plate is provided on one side of the rotating shaft, a worm is rotatably connected to the outer wall of one side of the vertical plate, and the worm is welded to the top outer wall of the rotating shaft, a worm wheel is meshed on the outer wall of the worm, and a first connecting rod is rotatably connected to the outer wall of one side of the worm wheel, the outer wall of one end of the first connecting rod is rotatably connected to the second connecting rod, and a paint spray pipe is fixedly connected to the outer wall of one side of the second connecting rod, and atomizing nozzles distributed at equal distances are installed on the inner side of the paint spray pipe.

[0010] Through the above scheme, the transmission structure of the worm gear and worm is combined with the first and second connecting rods to drive the paint spray pipe to move with multiple degrees of freedom in the horizontal and vertical directions. The atomizing nozzles are distributed on the top and side of the valve body. Combined with the rotation function of the butterfly valve positioning platform, the inner and outer surfaces of the valve body and the flange edge of the valve body can be fully covered by paint. At the same time, the servo motor accurately controls the rotation speed to ensure that the paint spray trajectory matches the geometric characteristics of the butterfly valve, which can effectively eliminate the problem of spray leakage and significantly improve the uniformity of the coating. The mist suction main pipe and the mist suction auxiliary pipe adopt an internal and external double-hood design, covering the inner and outer areas of the valve body respectively. The blower and air filter work together to extract the paint mist generated during the spraying process in real time, and realize the dynamic sealing connection between the mist suction main pipe and the butterfly valve positioning platform through the rotary joint. The mist suction range is adjusted synchronously with the position of the atomizing nozzle, which can improve the efficiency of paint mist capture and effectively reduce environmental pollution and raw material waste.

[0011] Preferably, the mist suction main pipe and the rotating shaft are both rotatably connected to the top outer wall of the painting booth through bearings.

[0012] Preferably, the pulley pair comprises pulleys which are respectively installed on the mist suction main pipe and the outer wall of the rotating shaft and are adjacent to each other, and are engaged with a transmission belt between the two pulleys.

[0013] Preferably, the worm gear is rotatably connected to an outer wall of one side of the vertical plate, and the second connecting rod is rotatably connected to an outer wall of one side of the vertical plate.

[0014] Preferably, the outer wall of one end of the paint spray pipe is fixedly connected to the paint supply pipe, and an electromagnetic valve is installed on the outer wall of the paint supply pipe, the outer wall of the bottom of the butterfly valve positioning platform is fixedly connected to the mist suction auxiliary pipe, and the outer wall of one end of the mist suction auxiliary pipe is fixedly connected to the outer wall of the mist suction main pipe, the outer wall of the bottom of the mist suction main pipe is rotatably connected to the filter pipe through a rotary joint, and an air filter element is installed on the outer wall of the filter pipe, and a blower is installed on the outer wall of the end of the filter pipe away from the mist suction main pipe.

[0015] Preferably, the top outer wall of the paint spray booth is fixedly connected to a positioning frame by bolts, and the butterfly valve positioning platform is rotatably connected to the inner wall of the positioning frame. A valve body is placed on the top outer wall of the butterfly valve positioning platform, and the atomizing nozzles include two groups, one group of atomizing nozzles is located at the top of the valve body, and the other group of atomizing nozzles is located on one side of the valve body.

[0016] Preferably, the butterfly valve positioning platform includes a support ring, an inner mist suction hood, and an outer mist suction hood, wherein the support ring is arranged on the bottom outer wall of the valve body, the inner mist suction hood is welded to the inner wall of the support ring, and the outer mist suction hood is welded to the outer wall of the support ring. The main mist suction pipe is welded at the center of the bottom outer wall of the inner mist suction hood, and the auxiliary mist suction pipe is welded to the bottom outer wall of the outer mist suction hood, and the auxiliary mist suction pipe is located inside the positioning frame.

[0017] Preferably, the top outer wall of the support ring is provided with equally spaced distance adjusting grooves, and a positioning pin is provided at the top of the distance adjusting groove, a screw is welded to the bottom outer wall of the positioning pin, and a nut is screwed on the outer wall of the screw, the screw is arranged through the interior of the distance adjusting groove, and the nut is tightly attached to the bottom outer wall of the support ring, and the valve body is tightly attached to the outer wall of the positioning pin.

[0018] Preferably, adjacent support legs are welded to the bottom of the paint spray booth, and one side outer wall of one group of support legs is fixedly connected to the motor seat by bolts, and the servo motor is fixedly connected to the outer wall of one side of the motor seat by bolts, and the other group of support legs is welded to the outer wall of one side of the support plate, and a filter element positioning ring is provided on the top outer wall of the support plate, the air filter element is placed on the inner wall of the filter element positioning ring, and the blower is installed on the top outer wall of the support plate, a PLC controller is installed on the top outer wall of the support plate, and the PLC controller is located on one side of the air filter element, a sub-control switch is installed on the outer wall of one side of the paint spray booth, and the sub-control switch, PLC controller, servo motor, blower and solenoid valve are all connected by signal lines.

[0019] Through the above solution, the PLC controller integrates servo motors, blowers, solenoid valves and other execution units, and realizes automatic adjustment of spraying speed, paint volume and mist suction intensity through preset programs. The sub-control switch supports manual fine-tuning to adapt to the process requirements of butterfly valves of different specifications. The positioning pin and the distance adjustment slot can quickly adjust the clamping size of the valve body, shorten the changeover time, and help to significantly improve batch production efficiency and process consistency.

[0020] Preferably, an isolation frame is fixedly connected to three peripheries of the outer wall of the top of the spray booth, and the valve body is located inside the isolation frame.

[0021] The beneficial effects of the present invention are:

[0022] The present invention's butterfly valve painting device utilizes a worm gear and worm transmission structure in combination with a first and second connecting rod to drive the paint spray hose in multiple degrees of freedom, both horizontally and vertically. Atomizing nozzles are located on the top and sides of the valve body. Combined with the rotational function of the butterfly valve positioning platform, this device achieves full coverage of the inner and outer surfaces of the valve body, as well as the flange edge. Furthermore, a servo motor precisely controls the rotational speed, ensuring that the paint spray trajectory matches the butterfly valve's geometric features. This effectively eliminates spray leaks and significantly improves coating uniformity.

[0023] 2. The paint spraying device for butterfly valve processing of the present invention adopts an inner and outer double-cover design for the mist suction main pipe and the mist suction auxiliary pipe, respectively covering the inner and outer areas of the valve body. The blower and the air filter work together to extract the paint mist generated during the spraying process in real time. The rotary joint realizes a dynamic sealing connection between the mist suction main pipe and the butterfly valve positioning platform. The mist suction range is adjusted synchronously with the position of the atomizing nozzle, which can improve the efficiency of paint mist capture and effectively reduce environmental pollution and raw material waste.

[0024] 3. The paint spraying device for butterfly valve processing of the present invention has a PLC controller that integrates execution units such as servo motors, blowers, and solenoid valves. It realizes automatic adjustment of paint spraying speed, paint volume, and mist suction intensity through preset programs. The sub-control switch supports manual fine-tuning to adapt to the process requirements of butterfly valves of different specifications. The positioning pin and the distance adjustment slot cooperate to quickly adjust the clamping size of the valve body, shorten the changeover time, and help to greatly improve batch production efficiency and process consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a paint spraying device for butterfly valve processing proposed by the present invention;

[0026] Figure 2 This is a front view of the overall structure of a paint spraying device for butterfly valve processing proposed by the present invention;

[0027] Figure 3 This is a side view of the overall structure of a paint spraying device for butterfly valve processing proposed by the present invention;

[0028] Figure 4 Schematic diagram of the internal connection structure of the painting table of a painting device for butterfly valve processing proposed by the present invention Figure 1 ;

[0029] Figure 5 Schematic diagram of the internal connection structure of the painting table of a painting device for butterfly valve processing proposed by the present invention Figure 2 ;

[0030] Figure 6 Schematic diagram of the vertical plate connection structure of a butterfly valve processing painting device proposed by the present invention Figure 1 ;

[0031] Figure 7 Schematic diagram of the vertical plate connection structure of a butterfly valve processing painting device proposed by the present invention Figure 1 ;

[0032] Figure 8 This is a schematic diagram of the disassembled structure of the positioning frame, butterfly valve positioning platform and valve body of a painting device for butterfly valve processing proposed by the present invention;

[0033] Figure 9 This is a schematic structural diagram of a butterfly valve positioning platform of a butterfly valve processing paint spraying device proposed by the present invention;

[0034] Figure 10 This is an enlarged schematic diagram of the structure of part A of a paint spraying device for butterfly valve processing proposed by the present invention.

[0035] In the figure: 1. Paint spray booth; 2. Butterfly valve positioning platform; 201. Support ring; 202. Inner mist suction hood; 203. Outer mist suction hood; 3. Mist suction main pipe; 4. Rotating shaft; 5. Pulley pair; 6. Servo motor; 7. Vertical plate; 8. Worm; 9. Worm gear; 10. First connecting rod; 11. Second connecting rod; 12. Paint spray pipe; 13. Atomizing nozzle; 14. Paint supply pipe; 15. Solenoid valve; 16. Mist suction auxiliary pipe; 17. Filter pipe; 18. Air filter element; 19. Blower; 20. Positioning frame; 21. Valve body; 22. Positioning pin; 23. Screw; 24. Nut; 25. Adjustable pitch groove; 26. Motor base; 27. Support plate; 28. Filter element positioning ring; 29. PLC controller; 30. Sub-control switch; 31. Isolation frame. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Reference Figures 1-10, Embodiment 1, a painting device for butterfly valve processing, comprising a painting table 1, a butterfly valve positioning platform 2 is provided on the top outer wall of the painting table 1, and a mist suction pipe 3 is welded at the bottom center of the butterfly valve positioning platform 2, a rotating shaft 4 is provided on one side of the mist suction pipe 3, and a pulley pair 5 is installed between the mist suction pipe 3 and the rotating shaft 4, and a servo motor 6 is fixedly connected to the bottom outer wall of the rotating shaft 4 through a coupling, a vertical plate 7 is welded on the top outer wall of the painting table 1, and the vertical plate 7 is provided on one side of the rotating shaft 4, a worm 8 is rotatably connected to the outer wall of one side of the vertical plate 7, and the worm 8 is welded to the top outer wall of the rotating shaft 4, a worm gear 9 is meshed on the outer wall of the worm 8, and a first connecting rod 10 is rotatably connected to the outer wall of one side of the worm gear 9, the outer wall of one end of the first connecting rod 10 is rotatably connected to the second connecting rod 11, and a paint spray pipe 12 is fixedly connected to the outer wall of one side of the second connecting rod 11, and an atomizing nozzle 13 distributed at equal distances is installed on the inner side of the paint spray pipe 12;

[0038] Servo motor 6 drives shaft 4, which in turn rotates mist suction pipe 3 via pulley pair 5. Worm 8 at the top of shaft 4 meshes with worm gear 9, converting the rotational motion into reciprocating oscillation of first connecting rod 10. Second connecting rod 11 further amplifies the motion, causing spray pipe 12 to swing in a fan-shaped pattern in the horizontal plane. Furthermore, atomizing nozzle 13 is height-adjustable along with spray pipe 12, allowing coverage of different areas of valve body 21.

[0039] In this embodiment, the transmission structure of the worm gear 9 and worm 8, combined with the first connecting rod 10 and the second connecting rod 11, drives the paint spray tube 12 to move with multiple degrees of freedom in the horizontal and vertical directions. Atomizing nozzles 13 are distributed on the top and sides of the valve body 21. Combined with the rotation function of the butterfly valve positioning platform 2, the paint spraying can achieve full coverage of the inner and outer surfaces of the valve body 21 and the flange edge of the valve body 21. At the same time, the servo motor 6 precisely controls the rotation speed to ensure that the paint spray trajectory matches the geometric characteristics of the butterfly valve, effectively eliminating the problem of spray leakage and significantly improving the uniformity of the coating.

[0040] In the second embodiment, the outer wall of one end of the paint spray pipe 12 is fixedly connected to the paint supply pipe 14, and the outer wall of the paint supply pipe 14 is installed with a solenoid valve 15. The outer wall of the bottom of the butterfly valve positioning platform 2 is fixedly connected to the mist suction auxiliary pipe 16, and the outer wall of one end of the mist suction auxiliary pipe 16 is fixedly connected to the outer wall of the mist suction main pipe 3. The outer wall of the bottom of the mist suction main pipe 3 is rotatably connected to a filter pipe 17 through a rotary joint, and an air filter element 18 is installed on the outer wall of the filter pipe 17. A blower 19 is installed on the outer wall of the end of the filter pipe 17 away from the mist suction main pipe 3;

[0041] The paint supply pipe 14 controls the paint flow rate via a solenoid valve 15, and the paint spraying pressure can be provided by an external pump station. The auxiliary mist suction pipe 16 is connected to the main mist suction pipe 3. When the blower 19 is activated, the paint mist is collected by the inner and outer mist suction hoods 202 and 203, and then purified by the air filter 18 in the filter pipe 17 before being discharged. A rotary joint ensures that the main mist suction pipe 3 remains airtight even as it rotates with the butterfly valve positioning platform 2.

[0042] The butterfly valve positioning platform 2 includes a support ring 201, an inner mist suction cover 202, and an outer mist suction cover 203, wherein the support ring 201 is arranged on the bottom outer wall of the valve body 21, the inner mist suction cover 202 is welded to the inner wall of the support ring 201, and the outer mist suction cover 203 is welded to the outer wall of the support ring 201. The mist suction main pipe 3 is welded to the center of the bottom outer wall of the inner mist suction cover 202, and the mist suction auxiliary pipe 16 is welded to the bottom outer wall of the outer mist suction cover 203. The mist suction auxiliary pipe 16 is located inside the positioning frame 20;

[0043] The butterfly valve positioning platform 2 consists of a support ring 201, an inner mist extraction hood 202, and an outer mist extraction hood 203. Adjustable slots 25 and positioning pins 22 enable quick clamping of the valve body 21. During operation, the valve body 21 is placed on the support ring 201, the screw 23 is adjusted to ensure that the positioning pin 22 is in close contact with the outer wall of the valve body 21, and the nut 24 is tightened to secure it. The positioning frame 20 is bolted to the spray booth 1 to ensure the stability of the butterfly valve positioning platform 2 during rotation.

[0044] In this embodiment, the main mist suction pipe 3 and auxiliary mist suction pipe 16 utilize a dual-shield design, covering the inner and outer areas of the valve body 21, respectively. A blower 19 and air filter 18 work in conjunction to extract paint mist generated during the spraying process in real time. A rotary joint provides a dynamic seal between the main mist suction pipe 3 and the butterfly valve positioning platform 2. The mist suction range adjusts synchronously with the position of the atomizing nozzle 13, improving paint mist capture efficiency and effectively reducing environmental pollution and material waste.

[0045] The mist suction main pipe 3 and the rotating shaft 4 are both rotatably connected to the top outer wall of the painting booth 1 through bearings.

[0046] The pulley pair 5 includes adjacent pulleys respectively mounted on the outer wall of the mist suction main pipe 3 and the rotating shaft 4, and meshed with a transmission belt between the two pulleys.

[0047] The worm wheel 9 is rotatably connected to an outer wall of one side of the vertical plate 7 , and the second connecting rod 11 is rotatably connected to an outer wall of one side of the vertical plate 7 .

[0048] The top outer wall of the spray booth 1 is fixedly connected to a positioning frame 20 via bolts, and the butterfly valve positioning platform 2 is rotatably connected to the inner wall of the positioning frame 20. A valve body 21 is placed on the top outer wall of the butterfly valve positioning platform 2. The atomizing nozzles 13 include two groups, one group of atomizing nozzles 13 is located on the top of the valve body 21, and the other group of atomizing nozzles 13 is located on the side of the valve body 21. An isolation frame 31 is fixedly connected to the top outer wall of the spray booth 1 on three sides, and the valve body 21 is located inside the isolation frame 31.

[0049] The top outer wall of the support ring 201 is provided with equidistantly distributed distance adjusting grooves 25, and a positioning pin 22 is provided on the top of the distance adjusting groove 25. A screw 23 is welded to the bottom outer wall of the positioning pin 22, and a nut 24 is screwed on the outer wall of the screw 23. The screw 23 is arranged to pass through the interior of the distance adjusting groove 25, and the nut 24 is tightly attached to the bottom outer wall of the support ring 201, and the valve body 21 is tightly attached to the outer wall of the positioning pin 22.

[0050] The bottom of the paint spray booth 1 is welded with adjacent supporting legs, and one side outer wall of one group of supporting legs is fixedly connected to a motor seat 26 by bolts, and the servo motor 6 is fixedly connected to the outer wall of one side of the motor seat 26 by bolts, and the other group of supporting legs is welded with a support plate 27 on the outer wall of one side, and a filter element positioning ring 28 is provided on the top outer wall of the support plate 27, the air filter element 18 is placed on the inner wall of the filter element positioning ring 28, and the blower 19 is installed on the top outer wall of the support plate 27, and a PLC controller 29 is installed on the top outer wall of the support plate 27, and the PLC controller 29 is located on one side of the air filter element 18, a sub-control switch 30 is installed on the outer wall of one side of the paint spray booth 1, and the sub-control switch 30, the PLC controller 29, the servo motor 6, the blower 19 and the solenoid valve 15 are all connected by signal lines;

[0051] The PLC controller 29 presets the paint program, and the sub-switch 30 supports manual start and stop and parameter fine-tuning. An isolation frame 31 surrounds the paint spraying area to prevent paint mist from escaping. The filter retaining ring 28 features a quick-release design, facilitating regular replacement of the air filter 18. Anti-slip pads are installed on the bottom of the support legs to enhance equipment stability.

[0052] The PLC controller 29 integrates the servo motor 6, blower 19, solenoid valve 15, and other actuators. It automatically adjusts spray speed, paint volume, and mist absorption intensity through pre-set programming. The sub-control switch 30 supports manual fine-tuning to meet the process requirements of butterfly valves of different specifications. The positioning pin 22, coupled with the adjustable distance slot 25, allows for rapid adjustment of the clamping size of the valve body 21, shortening changeover time and significantly improving mass production efficiency and process consistency.

[0053] Working principle:

[0054] 1. Butterfly Valve Positioning: Place the valve body 21 on the butterfly valve positioning platform 2, adjust the position of the positioning pin 22 using the spacing slot 25, and secure the valve body 21 with the locking nut 24. The positioning frame 20 limits the lateral displacement of the butterfly valve positioning platform 2, ensuring that the center of rotation coincides with the axis of the valve body 21.

[0055] 2. Spraying: After the PLC controller 29 is activated, the servo motor 6 drives the rotating shaft 4 via the pulley pair 5. The meshing of the worm 8 and worm wheel 9 converts the rotational motion into the oscillation of the first connecting rod 10. The second connecting rod 11 drives the paint spray tube 12 along a preset trajectory. The atomizing nozzle 13 sprays the valve body 21 synchronously from the top and side. The solenoid valve 15 adjusts the paint flow according to the program.

[0056] 3. Paint Mist Treatment: After blower 19 is started, a negative pressure zone is created between the main mist suction pipe 3 and the auxiliary mist suction pipe 16. Paint mist is collected by the inner and outer mist suction hoods 202 and 203, purified by the air filter element 18 in the filter tube 17, and then discharged. A rotary joint ensures that the mist suction system continues to operate while the butterfly valve positioning platform 2 rotates.

[0057] 4. Intelligent Control: The PLC controller 29 monitors the servo motor 6 speed, blower 19 power, and solenoid valve 15 opening in real time, enabling human-machine interaction via the sub-control switch 30. After spraying is completed, the equipment automatically enters standby mode, and the air filter 18 can be manually replaced to maintain mist extraction efficiency.

[0058] The above description 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 the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A painting device for butterfly valve processing, comprising a painting station (1), characterized in that: The top outer wall of the spray booth (1) is provided with a butterfly valve positioning platform (2), and a mist suction pipe (3) is welded at the center of the bottom of the butterfly valve positioning platform (2), a rotating shaft (4) is provided on one side of the mist suction pipe (3), and a pulley pair (5) is installed between the mist suction pipe (3) and the rotating shaft (4), and a servo motor (6) is fixedly connected to the bottom outer wall of the rotating shaft (4) through a coupling, and a vertical plate (7) is welded on the top outer wall of the spray booth (1), and the vertical plate (7) is provided on one side of the rotating shaft (4). The outer wall of one side of the vertical plate (7) is rotatably connected to a worm (8), and the worm (8) is welded to the top outer wall of the rotating shaft (4); the outer wall of the worm (8) is meshed with a worm wheel (9), and the outer wall of one side of the worm wheel (9) is rotatably connected to a first connecting rod (10); the outer wall of one end of the first connecting rod (10) is rotatably connected to a second connecting rod (11), and the outer wall of one side of the second connecting rod (11) is fixedly connected to a paint spraying pipe (12), and the inner side of the paint spraying pipe (12) is equipped with atomizing nozzles (13) distributed at equal distances.

2. A paint spraying device for butterfly valve processing according to claim 1, characterized in that: The mist suction main pipe (3) and the rotating shaft (4) are both rotatably connected to the top outer wall of the painting booth (1) via bearings.

3. A paint spraying device for butterfly valve processing according to claim 1, characterized in that: The pulley pair (5) comprises pulleys arranged adjacent to each other and respectively mounted on the outer wall of the mist suction main pipe (3) and the rotating shaft (4), and meshing with a transmission belt between the two pulleys.

4. A paint spraying device for butterfly valve processing according to claim 1, characterized in that: The worm wheel (9) is rotatably connected to an outer wall of one side of the vertical plate (7), and the second connecting rod (11) is rotatably connected to an outer wall of one side of the vertical plate (7).

5. A paint spraying device for butterfly valve processing according to claim 1, characterized in that: The outer wall of one end of the paint spray pipe (12) is fixedly connected to a paint supply pipe (14), and a solenoid valve (15) is installed on the outer wall of the paint supply pipe (14); the outer wall of the bottom of the butterfly valve positioning platform (2) is fixedly connected to a mist suction auxiliary pipe (16), and the outer wall of one end of the mist suction auxiliary pipe (16) is fixedly connected to the outer wall of the mist suction main pipe (3); the outer wall of the bottom of the mist suction main pipe (3) is rotatably connected to a filter pipe (17) through a rotary joint, and an air filter element (18) is installed on the outer wall of the filter pipe (17); and a blower (19) is installed on the outer wall of one end of the filter pipe (17) away from the mist suction main pipe (3).

6. A paint spraying device for butterfly valve processing according to claim 1, characterized in that: The top outer wall of the paint spraying station (1) is fixedly connected to a positioning frame (20) by bolts, and the butterfly valve positioning platform (2) is rotatably connected to the inner wall of the positioning frame (20), and a valve body (21) is placed on the top outer wall of the butterfly valve positioning platform (2). The atomizing nozzles (13) include two groups, one group of atomizing nozzles (13) is located on the top of the valve body (21), and the other group of atomizing nozzles (13) is located on one side of the valve body (21).

7. A paint spraying device for butterfly valve processing according to claim 1, characterized in that: The butterfly valve positioning platform (2) comprises a support ring (201), an inner mist suction hood (202), and an outer mist suction hood (203), wherein the support ring (201) is arranged on the bottom outer wall of the valve body (21), the inner mist suction hood (202) is welded to the inner wall of the support ring (201), and the outer mist suction hood (203) is welded to the outer wall of the support ring (201); the mist suction main pipe (3) is welded to the center of the bottom outer wall of the inner mist suction hood (202), and the mist suction auxiliary pipe (16) is welded to the bottom outer wall of the outer mist suction hood (203); and the mist suction auxiliary pipe (16) is located inside the positioning frame (20).

8. A paint spraying device for butterfly valve processing according to claim 7, characterized in that: The top outer wall of the support ring (201) is provided with equidistantly distributed pitch-adjusting grooves (25), and a positioning pin (22) is provided at the top of the pitch-adjusting groove (25). A screw (23) is welded to the bottom outer wall of the positioning pin (22), and a nut (24) is screwed on the outer wall of the screw (23). The screw (23) is arranged to pass through the interior of the pitch-adjusting groove (25), and the nut (24) is tightly attached to the bottom outer wall of the support ring (201). The valve body (21) is tightly attached to the outer wall of the positioning pin (22).

9. The paint spraying device for butterfly valve processing according to claim 1, characterized in that: The bottom of the spray booth (1) is welded with adjacent supporting legs, and one side outer wall of one group of supporting legs is fixedly connected to a motor seat (26) by bolts, and the servo motor (6) is fixedly connected to the outer wall of one side of the motor seat (26) by bolts, and the outer wall of one side of the other group of supporting legs is welded with a supporting plate (27), and the top outer wall of the supporting plate (27) is provided with a filter element positioning ring (28), the air filter element (18) is placed on the inner wall of the filter element positioning ring (28), and the blower (19) is installed on the top outer wall of the supporting plate (27), and the top outer wall of the supporting plate (27) is installed with a PLC controller (29), and the PLC controller (29) is located on one side of the air filter element (18), and the outer wall of one side of the spray booth (1) is installed with a sub-control switch (30), and the sub-control switch (30), the PLC controller (29), the servo motor (6), the blower (19) and the solenoid valve (15) are all connected by signal lines.

10. The paint spraying device for butterfly valve processing according to claim 1, characterized in that: An isolation frame (31) is fixedly connected to three peripheries of the top outer wall of the spray painting booth (1), and the valve body (21) is located inside the isolation frame (31).

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