Pneumatic tensioning structure of spraying equipment

Abstract

The invention discloses a pneumatic tensioning structure of spraying equipment, and relates to the technical field of spraying equipment. The device comprises a mounting frame, adjusting sliding grooves are symmetrically formed in the top of the mounting frame, sliding blocks are slidably connected to the interiors of the adjusting sliding grooves, reset springs are fixedly connected to one ends of the sliding blocks, the reset springs are mounted in the adjusting sliding grooves, a material guiding hard pipe is fixedly connected to one ends of the sliding blocks, and a coating bin is formed in the mounting frame. By starting the driving mechanism, the two sliding blocks can be driven to push the sealing ring to move close to or away from each other in the length direction of the adjusting sliding groove, then the internal space of the coating bin is changed, meanwhile, the feeding mechanism is matched for continuously and stably conveying coating into the coating bin, the internal air pressure of the coating bin is adjusted conveniently, and the working efficiency is improved. And therefore, the flow speed of the coating penetrating through the interior of the coating bin is changed, the amount of the coating sprayed out through the spraying pipe is adjusted, the ideal spraying effect is achieved, and the stability and reliability of the device are improved.

Description

Technical Field

[0001] The present application relates to the technical field of spraying equipment, and in particular to a pneumatic expansion structure of spraying equipment. Background Art

[0002] Spraying equipment is widely used in industrial production to coat various products. Currently, spraying equipment mostly uses electrical control systems to achieve precise spraying of paint. These electrical control systems usually contain components such as sensors, controllers and actuators to ensure uniform spraying of paint. However, in certain environments, such as high humidity or high dust, the stability and reliability of the electrical system may be affected.

[0003] At present, spraying equipment generally uses electrical control systems for precise spraying control. These systems monitor the spraying process through sensors, controllers perform calculations and adjustments, and actuators implement spraying operations, thereby achieving accurate and uniform spraying of paint. However, these electrical systems may malfunction in harsh environments such as high humidity and high dust, and the maintenance cost after long-term operation is relatively high.

[0004] Although the electrical control system can achieve precise spray control, its stability and reliability will be affected in harsh environments, such as places with high humidity and high dust, and it is prone to failure. Therefore, the stability and reliability problems of existing spray equipment in harsh environments, as well as the high maintenance cost problem, need to be solved urgently. Summary of the invention

[0005] The purpose of the present application is to solve the problem that the existing spraying equipment is prone to failure in harsh environments, which affects its stability and reliability. The present application provides a pneumatic expansion structure for the spraying equipment.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A pneumatic expansion structure for spraying equipment comprises a mounting frame, wherein an adjusting slot is symmetrically provided on the top of the mounting frame, a slider is slidably connected inside the adjusting slot, one end of the slider is fixedly connected to a material guiding tube, the mounting frame is provided with a paint bin inside, one end of the material guiding tube passes through the paint bin and is fixedly connected to a sealing ring, an air pipe is fixedly connected to the top of the paint bin, and a spraying tube is fixedly connected to one end of the paint bin, a driving mechanism for driving two sliders to move along the length direction of the adjusting slot is installed at one end of the mounting frame, and a feeding mechanism for conveying paint to the inside of the paint bin through the material guiding tube is installed at one end of the mounting frame.

[0007] By adopting the above technical scheme and setting up the coordinated use of the driving mechanism and the feeding mechanism, when the air compressor is connected to the air pipe and the feeding hose is connected to the suction pump, the two sliders can be driven by starting the driving mechanism to push the sealing rings to move closer to or away from each other along the length direction of the adjusting slide groove, thereby changing the internal space of the paint bin, and at the same time cooperating with the feeding mechanism to continuously and stably transport paint to the inside of the paint bin, so as to adjust the internal air pressure of the paint bin, thereby changing the flow rate of the paint passing through the paint bin, and then adjusting the amount of paint sprayed through the spray pipe, so as to achieve an ideal spraying effect, thereby improving the stability and reliability of the device.

[0008] Furthermore, the driving mechanism includes a follower sprocket rotatably connected to the top of the slider, one end of the mounting frame is fixedly connected to the slide, the top of the slide is slidably connected to the slide, the top of the slide is rotatably connected to the driving sprocket, the outer meshing sleeve of the follower sprocket and the driving sprocket is provided with a synchronous chain, and one end of the mounting frame is installed with a driving component for driving the slide to move along the length direction of the slide.

[0009] By adopting the above technical scheme, by setting the driving component and the follower sprocket and the active sprocket and the synchronous chain for use in coordination, when the driving component is started to drive the slide to drive the active sprocket to move along the length direction of the slide, the active sprocket cooperates with the synchronous chain to drive the two follower sprockets to drive the slider to cooperate with the return spring to move towards or away from each other along the length direction of the adjustment slide groove, so that the slider cooperates with the material guide tube to drive the two sealing rings to move towards or away from each other along the inner wall of the paint bin, thereby facilitating the adjustment of the internal space of the paint bin and effectively improving the practicability of the device.

[0010] Furthermore, the driving assembly includes an adjusting cylinder fixedly connected to one end of the mounting frame, one end of the mounting frame is rotatably connected to a pair of adjusting sprockets, an output end of the adjusting cylinder is fixedly connected to an adjusting chain, one end of the adjusting chain engages and passes around two adjusting sprockets and is fixedly connected to a slide, one end of the slide is fixedly connected to a traction rope, one end of the traction rope is fixedly connected to a weight block, one end of the mounting frame is rotatably connected to a support wheel, and the middle section of the traction rope passes around the support wheel.

[0011] By adopting the above technical scheme, one end of the adjusting cylinder is started to pull one end of the adjusting chain around the adjusting sprocket for meshing and moving, so that the adjusting chain drives the slide to move away from the weight block along the length direction of the slide. Then, when the adjusting cylinder is started in reverse to push out one end of the adjusting chain, the weight block uses its own gravity to pull the traction rope and the support wheel to form a rolling conflict, and drives the slide to move closer to the weight block along the length direction of the slide. At the same time, one end of the slide pulls the adjusting chain around the adjusting sprocket for meshing and moving, thereby facilitating the driving of the slide to move along the length direction of the slide, effectively improving the practicability of the device.

[0012] Furthermore, the feeding mechanism includes a feeding bin opened inside the slider, one end of the slider is fixedly connected to a feeding hose, the feeding bin is communicated with the feeding hose and the material guiding tube, one end of the follower sprocket extends to the interior of the feeding bin and is fixedly connected to a feeding impeller, and one end of the slide is equipped with a feeding assembly for driving the feeding impeller to rotate.

[0013] By adopting the above technical scheme, by setting the feeding component, the feeding bin and the feeding impeller for coordinated use, it is convenient to use the feeding hose to connect the feeding pump and introduce the paint into the interior of the feeding bin, and then drive the active sprocket to rotate by starting the feeding component, and make the active sprocket and the coordinated synchronous chain drive the driven sprocket to rotate, so that the driven sprocket drives the feeding impeller to rotate to generate thrust, and pushes the paint inside the feeding bin to continuously pass through the guide hard pipe into the interior of the paint bin, so as to facilitate continuous and stable feeding to the interior of the paint bin, and effectively improve the stability of the device.

[0014] Furthermore, the feeding assembly includes a worm wheel fixedly connected to one end of the driving sprocket, the top of the slide is rotatably connected to a worm meshing with the worm wheel, the top of the slide is fixedly connected to a feeding motor, and the output end of the feeding motor is fixedly connected to the worm.

[0015] By adopting the above technical solution and arranging the coordinated use of the worm wheel and the worm, starting the feeding motor can drive the worm and the worm wheel to engage, and the worm wheel drives the active sprocket to rotate, thereby facilitating the driving sprocket to rotate and effectively improving the practicability of the device.

[0016] Furthermore, an air pressure sensor is fixedly connected to the interior of the paint tank, and a remote communication module is arranged inside the air pressure sensor.

[0017] By adopting the above technical solution, by setting up the air pressure sensor and using it in conjunction with the paint bin, it is convenient to monitor the air pressure changes inside the paint bin in real time, so as to judge the spraying stability of the paint, and when the air pressure changes inside the paint bin exceed the specified range, the remote communication module is used to notify the staff to make timely adjustments, thereby further improving the practicality of the device.

[0018] Furthermore, the surfaces of the return spring, the follower sprocket, the driving sprocket, the synchronous chain, the adjusting sprocket, and the adjusting chain are all coated with an organic silicon waterproof coating.

[0019] By adopting the above technical solution and providing an organic silicon waterproof coating, the corrosion resistance of the device is effectively improved and the service life of the device in a humid environment is extended.

[0020] In summary, the present application includes at least one of the following beneficial effects: 1. By setting up the coordinated use of the driving mechanism and the feeding mechanism, when the air compressor is connected to the air pipe and the feeding hose is connected to the suction pump, the two sliders can be driven by starting the driving mechanism to push the sealing rings to move closer to or away from each other along the length direction of the adjusting slide groove, thereby changing the internal space of the paint bin. At the same time, the feeding mechanism is cooperated to continuously and stably transport paint to the inside of the paint bin, so as to adjust the internal air pressure of the paint bin, thereby changing the flow rate of the paint passing through the paint bin, and then adjusting the amount of paint sprayed through the spray pipe, so as to achieve an ideal spraying effect, thereby improving the stability and reliability of the device.

[0021] 2. By setting the driving component and the follower sprocket in cooperation with the active sprocket and the synchronous chain, when the driving component is started to drive the slide to drive the active sprocket to move along the length direction of the slide, the active sprocket cooperates with the synchronous chain to drive the two follower sprockets to drive the slider to cooperate with the return spring to move towards or away from each other along the length direction of the adjustment slide groove, so that the slider cooperates with the material guide tube to drive the two sealing rings to move towards or away from each other along the inner wall of the paint bin, thereby facilitating the adjustment of the internal space of the paint bin and effectively improving the practicability of the device.

[0022] 3. By setting up the coordinated use of the feeding component, the feeding bin and the feeding impeller, it is convenient to use the feeding hose to connect the feeding pump and guide the paint into the interior of the feeding bin. Then, by starting the feeding component, the active sprocket is driven to rotate, and the synchronous chain of the active sprocket drives the driven sprocket to rotate, so that the driven sprocket drives the feeding impeller to rotate to generate thrust, and pushes the paint inside the feeding bin to continuously pass through the guide tube into the interior of the paint bin, so as to facilitate continuous and stable feeding to the interior of the paint bin, and effectively improve the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the driving component in this application.

[0025] Figure 3 It is a schematic diagram of the internal structure of the adjusting chute in this application.

[0026] Figure 4 It is a partial structural schematic diagram of the device body in this application.

[0027] Description of reference numerals: 1. Mounting frame; 2. Adjusting slide; 3. Sliding block; 4. Reset spring; 5. Material guide tube; 6. Paint bin; 7. Sealing ring; 8. Air pipe; 9. Spraying tube; 10. Follower sprocket; 11. Slide; 12. Slide; 13. Driving sprocket; 14. Synchronous chain; 15. Adjusting cylinder; 16. Adjusting sprocket; 17. Adjusting chain; 18. Traction rope; 19. Weight block; 20. Feeding bin; 21. Feeding hose; 22. Feeding impeller; 23. Worm gear; 24. Worm; 25. Feeding motor; 26. Air pressure sensor; 27. Support wheel. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The embodiment of the present application discloses a pneumatic expansion structure of a spraying equipment.

[0030] Reference Figure 1-Figure 4 , a pneumatic tightening structure of a spraying equipment, comprising a mounting frame 1, an adjusting slide 2 is symmetrically opened on the top of the mounting frame 1, a slider 3 is slidably connected inside the adjusting slide 2, one end of the slider 3 is fixedly connected to a return spring 4, the return spring 4 is installed inside the adjusting slide 2, one end of the slider 3 is fixedly connected to a material guide tube 5, a paint bin 6 is opened inside the mounting frame 1, one end of the material guide tube 5 passes through the paint bin 6 and is fixedly connected to a sealing ring 7, an air pipe 8 is fixedly connected to the top of the paint bin 6, and one end of the paint bin 6 is fixedly connected to a spraying pipe 9, one end of the mounting frame 1 is installed with a driving mechanism for driving two sliders 3 to move along the length direction of the adjusting slide 2, and one end of the mounting frame 1 is installed with a feeding mechanism for conveying paint to the inside of the paint bin 6 through the material guide tube 5; The driving mechanism includes a follower sprocket 10 rotatably connected to the top of the slider 3, a slide 11 is fixedly connected to one end of the mounting frame 1, a slide 12 is slidably connected to the top of the slide 11, a driving sprocket 13 is rotatably connected to the top of the slide 12, a synchronous chain 14 is provided on the outer meshing sleeve of the follower sprocket 10 and the driving sprocket 13, and a driving component for driving the slide 12 to move along the length direction of the slide 11 is installed at one end of the mounting frame 1; Moreover, the driving assembly includes an adjusting cylinder 15 fixedly connected to one end of the mounting frame 1, one end of the mounting frame 1 is rotatably connected to a pair of adjusting sprockets 16, an output end of the adjusting cylinder 15 is fixedly connected to an adjusting chain 17, one end of the adjusting chain 17 meshes and passes around the two adjusting sprockets 16, and is fixedly connected to the slide 12, one end of the slide 12 is fixedly connected to a traction rope 18, one end of the traction rope 18 is fixedly connected to a load block 19, one end of the mounting frame 1 is rotatably connected to a support wheel 27, and the middle section of the traction rope 18 passes around the support wheel 27; Moreover, the feeding mechanism includes a feeding bin 20 opened inside the slider 3, one end of the slider 3 is fixedly connected to a feeding hose 21, the feeding bin 20 is connected to the feeding hose 21 and the guide tube 5, one end of the follower sprocket 10 extends to the inside of the feeding bin 20 and is fixedly connected to a feeding impeller 22, and one end of the slide 12 is installed with a feeding assembly for driving the feeding impeller 22 to rotate; In addition, the feeding assembly includes a worm wheel 23 fixedly connected to one end of the driving sprocket 13, the top of the slide 12 is rotatably connected to a worm 24 meshing with the worm wheel 23, the top of the slide 12 is fixedly connected to a feeding motor 25, and the output end of the feeding motor 25 is fixedly connected to the worm 24.

[0031] When in use, firstly, the pressurized gas is input into the paint bin 6 by setting the air pipe 8 to connect the air compressor, and the pressurized gas is discharged after passing through the air pipe 8 and the spray pipe 9. At the same time, the feeding hose 21 is set to connect the material pump to make the material pump introduce the paint into the feeding bin 20 through the feeding hose 21. Then, by starting the adjusting cylinder 15, the output end of the adjusting cylinder 15 drives the adjusting chain 17 to engage with the adjusting sprocket 16 and move around the adjusting sprocket 16. At the same time, the adjusting chain 17 pulls the slide 12 to drive the driving sprocket 13 to move along the length direction of the slide 11, and the driving sprocket 13 moves along the length direction of the slide 11. The driving sprocket 13 drives one end of the synchronous chain 14 to come into contact with the driven sprocket 10, and the two driven sprockets 10 drive the two sliders 3 to move closer to each other along the length direction of the adjusting slide 2. At the same time, the slider 3 drives the guide tube 5 to insert into the paint bin 6, and pushes the two sealing rings 7 to move closer to each other along the length direction of the paint bin 6, which effectively shortens the internal space of the paint bin 6 and increases the air pressure inside the paint bin 6, thereby accelerating the flow rate of the paint passing through the paint bin 6, resulting in an increase in the amount of paint sprayed from the spray pipe 9; Similarly, by reversely starting the adjusting cylinder 15, the output end of the adjusting cylinder 15 drives the adjusting chain 17 to mesh with the adjusting sprocket 16 and move around the adjusting sprocket 16, and at the same time, the adjusting chain 17 pulls the slide 12 to drive the driving sprocket 13 to move toward the slider 3 along the length direction of the slide table 11, so that the return spring 4 rebounds along the length direction of the adjusting slide 2 to eject the slider 3, and at the same time, the two sliders 3 drive the two follower sprockets 10 to move away from each other along the length direction of the adjusting slide 2, and the slider 3 pulls the guide tube 5 to drive the two sealing rings 7 to move away from each other along the length direction of the paint bin 6, and at the same time effectively increases the internal space of the paint bin 6, and reduces the internal air pressure of the paint bin 6, thereby reducing the flow rate of the paint passing through the paint bin 6, resulting in a decrease in the amount of paint sprayed from the spray pipe 9, so that it is convenient to use the adjusting cylinder 15 to control the spraying amount of the paint, so that it can achieve an ideal spraying effect, and improve the stability and reliability of the device; Then, the feeding motor 25 is started to drive the worm 24 to rotate, and the worm 24 is meshed with the worm wheel 23, so that the worm wheel 23 drives the active sprocket 13 to rotate, and then the active sprocket 13 is used to cooperate with the synchronous chain 14 to drive the two follower sprockets 10 to rotate synchronously, so that the follower sprocket 10 drives the feeding impeller 22 to rotate inside the feeding bin 20, and the paint introduced into the feeding bin 20 through the external suction pump of the feeding hose 21 is pushed by the rotation of the feeding impeller 22, and is accelerated to pass through the guide tube 5 into the paint bin 6, and then sprayed out through the spray pipe 9, so as to facilitate the stable output of the paint and effectively improve the spraying stability of the device.

[0032] Reference Figure 1-Figure 3 The interior of the paint bin 6 is fixedly connected with an air pressure sensor 26 , and a remote communication module is arranged inside the air pressure sensor 26 .

[0033] When in use, firstly, the air pressure sensor 26 is set to sense the air pressure data inside the paint bin 6 in real time. When the air pressure data inside the paint bin 6 exceeds the specified range, the paint bin 6 sends abnormal information to the staff through the remote communication module, and prompts the staff to deal with it in time, thereby effectively improving the accuracy of the device.

[0034] Reference Figure 1-Figure 3 The surfaces of the return spring 4, the driven sprocket 10, the driving sprocket 13, the synchronous chain 14, the adjusting sprocket 16 and the adjusting chain 17 are all coated with organic silicon waterproof coating.

[0035] When in use, by coating the surfaces of the return spring 4 and the driven sprocket 10, the driving sprocket 13, the synchronous chain 14, the adjusting sprocket 16, and the adjusting chain 17 with a silicone waterproof coating, a waterproof protective layer is formed on the surfaces of the return spring 4 and the driven sprocket 10, the driving sprocket 13, the synchronous chain 14, the adjusting sprocket 16, and the adjusting chain 17, thereby effectively improving the corrosion resistance of the device and extending the service life of the device.

[0036] The implementation principle of the pneumatic expansion structure of a spraying equipment in this embodiment is as follows: first, the pressurized gas is input into the paint bin 6 by setting an air pipe 8 to connect an air compressor, and the pressurized gas is discharged after passing through the air pipe 8 and the spray pipe 9. At the same time, a feeding hose 21 is set to connect an external pump, so that the pump guides the paint into the feeding bin 20 through the feeding hose 21, and supplies the paint to the paint bin 6 through the guide tube 5. At the same time, an air pressure sensor 26 is set to monitor the air pressure change inside the paint bin 6 in real time, and when the air pressure change inside the paint bin 6 exceeds a specified range, the remote communication module is used to notify the staff to make timely adjustments; Then, the feeding motor 25 is started to drive the worm 24 to rotate, and the worm 24 is meshed with the worm wheel 23, so that the worm wheel 23 drives the driving sprocket 13 to rotate, and then the driving sprocket 13 cooperates with the synchronous chain 14 to drive the two driven sprockets 10 to rotate synchronously, so that the driven sprocket 10 drives the feeding impeller 22 to rotate inside the feeding bin 20, and the paint introduced into the feeding bin 20 through the external suction pump of the feeding hose 21 is driven by the rotation of the feeding impeller 22, and is accelerated to pass through the guide tube 5 into the paint bin 6, and then sprayed out through the spray pipe 9; Then, by starting the adjusting cylinder 15, the adjusting chain 17 is driven to mesh with the adjusting sprocket 16 and move around the adjusting sprocket 16, and at the same time, the adjusting chain 17 pulls the slide 12 to drive the driving sprocket 13 to move along the length direction of the slide 11, and the driving sprocket 13 moves away from the slider 3 along the length direction of the slide 11, so that the driving sprocket 13 drives one end of the synchronous chain 14 to form a conflict with the follower sprocket 10, and pushes the two follower sprockets 10 to drive the two sliders 3 to move closer to each other along the length direction of the adjusting slide 2, and at the same time, the slider 3 drives the guide tube 5 to insert into the paint bin 6, and pushes the two sealing rings 7 to move closer to each other along the length direction of the paint bin 6, and at the same time effectively shortens the internal space of the paint bin 6, and increases the internal air pressure of the paint bin 6, thereby accelerating the flow rate of the paint passing through the paint bin 6, resulting in an increase in the amount of paint sprayed from the spray pipe 9; Similarly, by starting the adjusting cylinder 15 in the reverse direction, the output end of the adjusting cylinder 15 drives the adjusting chain 17 to mesh with the adjusting sprocket 16 and move around the adjusting sprocket 16, and at the same time, the adjusting chain 17 pulls the slide 12 to drive the active sprocket 13 to move toward the slider 3 along the length direction of the slide table 11, so as to utilize the rebound characteristics of the return spring 4 to make the return spring 4 rebound along the length direction of the adjusting slide 2 to eject the slider 3, and at the same time, the two sliders 3 drive the two follower sprockets 10 to move away from each other along the length direction of the adjusting slide 2, and the slider 3 pulls the guide tube 5 to drive the two sealing rings 7 to move away from each other along the length direction of the paint bin 6, and at the same time effectively increases the internal space of the paint bin 6, and reduces the internal air pressure of the paint bin 6, thereby reducing the paint flow rate passing through the paint bin 6, resulting in a decrease in the amount of paint sprayed from the spray pipe 9.

Claims

1. A pneumatic expansion structure for a spraying device, comprising a mounting frame (1), characterized in that: The top of the mounting frame (1) is symmetrically provided with an adjusting slot (2), the inside of the adjusting slot (2) is slidably connected with a slider (3), one end of the slider (3) is fixedly connected with a return spring (4), the return spring (4) is installed inside the adjusting slot (2), one end of the slider (3) is fixedly connected with a material guide tube (5), a paint bin (6) is provided inside the mounting frame (1), one end of the material guide tube (5) passes through the paint bin (6) and is fixedly connected with a sealing ring (7), the top of the paint bin (6) is fixedly connected with an air pipe (8), and one end of the paint bin (6) is fixedly connected with a spray pipe (9), one end of the mounting frame (1) is installed with a driving mechanism for driving the two sliders (3) to move along the length direction of the adjusting slot (2), and one end of the mounting frame (1) is installed with a feeding mechanism for conveying paint into the paint bin (6) through the material guide tube (5).

2. The pneumatic expansion structure of a spraying equipment according to claim 1, characterized in that: The driving mechanism comprises a follower sprocket (10) rotatably connected to the top of the slider (3); one end of the mounting frame (1) is fixedly connected to a slide table (11); the top of the slide table (11) is slidably connected to a slide frame (12); the top of the slide frame (12) is rotatably connected to a driving sprocket (13); a synchronous chain (14) is provided on the outer meshing sleeves of the follower sprocket (10) and the driving sprocket (13); and one end of the mounting frame (1) is mounted with a driving component for driving the slide frame (12) to move along the length direction of the slide table (11).

3. The pneumatic expansion structure of a spraying equipment according to claim 2, characterized in that: The driving assembly comprises an adjusting cylinder (15) fixedly connected to one end of a mounting frame (1); one end of the mounting frame (1) is rotatably connected to a pair of adjusting sprockets (16); an output end of the adjusting cylinder (15) is fixedly connected to an adjusting chain (17); one end of the adjusting chain (17) meshes and passes around two adjusting sprockets (16) and is then fixedly connected to a slide frame (12); one end of the slide frame (12) is fixedly connected to a traction rope (18); one end of the traction rope (18) is fixedly connected to a load block (19); one end of the mounting frame (1) is rotatably connected to a support wheel (27); a middle section of the traction rope (18) passes around the support wheel (27).

4. The pneumatic expansion structure of a spraying device according to claim 2, characterized in that: The feeding mechanism comprises a feeding bin (20) opened inside a slider (3); one end of the slider (3) is fixedly connected to a feeding hose (21); the feeding bin (20) is in communication with the feeding hose (21) and a material guide tube (5); one end of the follower sprocket (10) extends into the inside of the feeding bin (20) and is fixedly connected to a feeding impeller (22); and one end of the slide (12) is mounted with a feeding assembly for driving the feeding impeller (22) to rotate.

5. The pneumatic expansion structure of the spraying equipment according to claim 4, characterized in that: The feeding assembly comprises a worm wheel (23) fixedly connected to one end of a driving sprocket (13); the top of the slide (12) is rotatably connected to a worm (24) meshing with the worm wheel (23); the top of the slide (12) is fixedly connected to a feeding motor (25); and the output end of the feeding motor (25) is fixedly connected to the worm (24).

6. The pneumatic expansion structure of a spraying device according to claim 1, characterized in that: An air pressure sensor (26) is fixedly connected to the interior of the paint bin (6), and a remote communication module is arranged inside the air pressure sensor (26).

7. The pneumatic expansion structure of a spraying device according to claim 3, characterized in that: The surfaces of the return spring (4), the follower sprocket (10), the driving sprocket (13), the synchronous chain (14), the adjusting sprocket (16), and the adjusting chain (17) are all coated with an organic silicon waterproof coating.

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