Pipeline inner diameter self-adaptive paint spraying robot

Abstract

A pipeline inner diameter self-adaption paint spraying robot comprises a walking assembly, an auxiliary supporting assembly and a spraying assembly. The walking assembly is of a Mecanum wheel type structure and is arranged at the front end of the auxiliary supporting assembly. The spraying assembly is of an autorotation spraying type structure and is arranged at the rear end of the auxiliary supporting assembly. The walking assembly comprises a walking driving motor, a walking assembly bin cylinder, a walking assembly bin cover and a variable-diameter supporting leg spoke wheel mechanism. The walking driving motor is located outside the walking assembly bin cylinder and is coaxially distributed, and the walking assembly bin cover is coaxially and fixedly installed at a cylinder opening of the walking assembly bin cylinder. The variable-diameter supporting leg spoke wheel mechanism is located in the walking assembly bin cylinder, and the rolling wheel end of the variable-diameter supporting leg spoke wheel mechanism extends out of the walking assembly bin cylinder. The pipeline inner diameter self-adaption paint spraying robot has the advantages of being simple in structure, good in moving convenience and good in pipeline inner diameter adaptability, manual intervention is not needed in the operation process, manpower output is saved, operation efficiency is improved, and anti-corrosion paint spraying quality stability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline inner wall painting equipment, in particular to a pipeline inner diameter adaptive painting robot. Background Art

[0002] As a vital means of transporting solids, liquids, and gases, pipelines can age rapidly under the influence of external environments such as corrosion and geological activity, which can easily lead to leaks. Therefore, to extend the service life of pipelines, anti-corrosion coatings are often sprayed on the inner walls of the pipelines to slow down the aging process.

[0003] Currently, the application of anti-corrosion coatings to pipeline interiors is primarily manual, with some semi-automatic spraying equipment also being used. However, manual spraying is labor-intensive, inefficient, and exhibits inconsistent coating quality. Semi-automatic spraying equipment is bulky, difficult to maneuver, and poorly adaptable to pipeline inner diameters. Utility Model Content

[0004] In response to the problems existing in the existing technology, the utility model provides a pipeline inner diameter adaptive painting robot, which has the characteristics of simple structure, good mobility and good adaptability to the inner diameter of the pipeline. It does not require human intervention during the operation, saves manpower output, effectively improves operation efficiency, and has good stability in the quality of anti-corrosion paint spraying.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a pipe inner diameter adaptive painting robot, comprising a walking component, an auxiliary support component and a spraying component; the walking component adopts a Mecanum wheel structure, and the walking component is arranged at the front end of the auxiliary support component; the spraying component adopts a self-rotating spraying structure, and the spraying component is arranged at the rear end of the auxiliary support component.

[0006] The walking assembly includes a walking drive motor, a walking assembly silo, a walking assembly silo cover and a variable diameter leg spoke wheel mechanism; the walking drive motor is located outside the walking assembly silo, the walking drive motor and the walking assembly silo are coaxially arranged, and the power output shaft of the walking drive motor is fixedly connected to the bottom plate of the walking assembly silo; the walking assembly silo cover is coaxially fixed at the barrel mouth of the walking assembly silo; the variable diameter leg spoke wheel mechanism is located inside the walking assembly silo, and the roller end of the variable diameter leg spoke wheel mechanism extends to the outside of the walking assembly silo.

[0007] The variable diameter support leg spoke wheel mechanism includes a variable diameter drive servo, a multi-rotor arm transmission plate, a multi-straight arm follower plate and a support leg spoke wheel unit; the variable diameter drive servo is fixedly connected to the inner surface of the walking component compartment cover, and the variable diameter drive servo and the walking component compartment cover are coaxially arranged; the multi-rotor arm transmission plate is coaxially fixed on the power output shaft of the variable diameter drive servo; the multi-straight arm follower plate is rotatably connected to the inner surface of the walking component compartment barrel, and the multi-straight arm follower plate is coaxially arranged with the walking component compartment barrel; the support leg spoke wheel unit is connected between the multi-rotor arm transmission plate and the multi-straight arm follower plate.

[0008] The number of rotary arms of the multi-rotor-arm transmission disc, the number of straight arms of the multi-straight-arm follower disc, and the number of leg spoke wheel units are the same, and the number is 3 to 6; the rotary arms of the multi-rotor-arm transmission disc are evenly distributed along the circumferential direction; the straight arms of the multi-straight-arm follower disc are evenly distributed along the circumferential direction.

[0009] The leg spoke wheel unit includes a connecting rod, a sliding pin, a leg slider, a spoke wheel base, a spring-type telescopic support rod, a wheel frame support and a waist drum-shaped roller; the inner end of the connecting rod is hinged to the top of the straight arm of the multi-straight arm follower plate, and the outer end of the connecting rod is hinged to the inner end of the leg slider; an arc-shaped slide groove begins in the swing arm of the multi-swing arm transmission plate, and one end of the sliding pin is fixedly connected to the outer end of the connecting rod, and the other end of the sliding pin extends into the arc-shaped slide groove; a slider guide port is opened on the circumferential wall of the walking component silo, and the leg slider The outer end extends through the slider guide port to the outside of the walking assembly silo, and the leg slider has only linear sliding freedom relative to the slider guide port; the spoke wheel base is fixedly installed on the outer end of the leg slider; the number of the spring-type telescopic support rod is at least one, the inner end of the spring-type telescopic support rod is fixedly connected to the spoke wheel base, the wheel frame support is fixedly connected to the outer end of the spring-type telescopic support rod, and the waist-drum-shaped roller is rotatably connected to the wheel frame support; the central axis of the waist-drum-shaped roller and the central axis of the multi-arm transmission disc have an angle of 45°.

[0010] The auxiliary support assembly includes a walking assembly adapter, a universal joint, an auxiliary support assembly cylinder, an auxiliary support rod, an auxiliary support spring, a driven support roller and a spray assembly adapter; the walking drive motor is fixedly connected to the front surface of the walking assembly adapter, and the walking drive motor and the walking assembly adapter are coaxially arranged; the front end of the universal joint is fixedly connected to the rear surface of the walking assembly adapter, and the rear end of the universal joint is fixedly connected to the front end of the auxiliary support assembly cylinder, and the spray assembly adapter is fixedly connected to the rear end of the auxiliary support assembly cylinder; the walking assembly adapter, the universal joint, the auxiliary support assembly cylinder and the spray assembly adapter are coaxially arranged; the number of the auxiliary support rods is 3 to 6, and the auxiliary support rods are evenly distributed along the circumference of the auxiliary support assembly cylinder, the inner end of the auxiliary support rod is hinged to the auxiliary support assembly cylinder, and the driven support roller is rotatably connected to the outer end of the auxiliary support rod; one end of the auxiliary support spring is connected to the middle of the auxiliary support rod, and the other end of the auxiliary support spring is connected to the auxiliary support assembly cylinder; the auxiliary support assembly cylinder serves as the central control warehouse of the pipeline inner diameter adaptive painting robot.

[0011] The spray assembly includes a rotary spraying drive motor, a spray assembly silo, a spray assembly silo cover, a paint nozzle, a paint storage tank and a paint delivery pump; the rotary spraying drive motor is located outside the spray assembly silo, the rotary spraying drive motor is fixedly connected to the spray assembly adapter, the rotary spraying drive motor and the spray assembly adapter are coaxially arranged, the power output shaft of the rotary spraying drive motor is fixedly connected to the bottom plate of the spray assembly silo, and the spray assembly silo and the rotary spraying drive motor are coaxially arranged; the spray assembly silo cover is coaxially fixed at the barrel mouth of the spray assembly silo; the paint nozzle is fixedly installed on the circumferential silo wall of the spray assembly silo; the paint storage tank and the paint delivery pump are arranged side by side inside the spray assembly silo, the paint storage tank is used to store anti-corrosion paint, the discharge port of the paint storage tank is connected to the feed port of the paint delivery pump, and the discharge port of the paint delivery pump is connected to the paint nozzle.

[0012] Beneficial effects of the utility model:

[0013] The utility model of the pipeline inner diameter adaptive painting robot has the characteristics of simple structure, good mobility and good adaptability to the pipeline inner diameter. It does not require manual intervention during the operation, saves manpower output, effectively improves operation efficiency, and has good stability in the quality of anti-corrosion paint spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a pipe inner diameter adaptive painting robot according to the present invention (viewpoint one);

[0015] Figure 2 This is a schematic diagram of the structure of a pipe inner diameter adaptive painting robot of the present invention (viewpoint 2);

[0016] Figure 3 This is a schematic diagram of the structure of the combined body of the multi-straight-arm follower plate and the six-leg spoke wheel unit of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the assembly of a multi-rotating-arm transmission plate, a multi-straight-arm follower plate, a connecting rod, a sliding pin and a leg slider of the utility model;

[0018] Figure 5 This is a schematic structural diagram of the auxiliary support assembly of the present utility model;

[0019] In the figure, 1 is a walking drive motor, 2 is a walking assembly silo, 3 is a walking assembly silo cover, 4 is a multi-arm transmission disc, 5 is a multi-straight arm follower disc, 6 is a connecting rod, 7 is a sliding pin, 8 is a leg slider, 9 is a spoke wheel base, 10 is a spring-loaded telescopic support rod, 11 is a wheel frame support, 12 is a waist drum roller, 13 is an arc-shaped slide groove, 14 is a slider guide port, 15 is a walking assembly adapter, 16 is a universal joint, 17 is an auxiliary support assembly silo, 18 is an auxiliary support rod, 19 is an auxiliary support spring, 20 is a driven support roller, 21 is a spray assembly adapter, 22 is a rotary spray drive motor, 23 is a spray assembly silo, 24 is a spray assembly silo cover, and 25 is a paint nozzle. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 5 As shown, a pipe inner diameter adaptive painting robot includes a walking component, an auxiliary support component and a spraying component; the walking component adopts a Mecanum wheel structure, and the walking component is arranged at the front end of the auxiliary support component; the spraying component adopts a self-rotating spraying structure, and the spraying component is arranged at the rear end of the auxiliary support component.

[0022] The walking component includes a walking drive motor 1, a walking component silo 2, a walking component silo cover 3 and a variable diameter leg spoke wheel mechanism; the walking drive motor 1 is located outside the walking component silo 2, the walking drive motor 1 and the walking component silo 2 are coaxially arranged, and the power output shaft of the walking drive motor 1 is fixedly connected to the bottom plate of the walking component silo 2; the walking component silo cover 3 is coaxially fixed at the tube mouth of the walking component silo 2; the variable diameter leg spoke wheel mechanism is located inside the walking component silo 2, and the roller end of the variable diameter leg spoke wheel mechanism extends to the outside of the walking component silo 2.

[0023] The variable diameter outrigger spoke wheel mechanism includes a variable diameter drive servo, a multi-rotor transmission disc 4, a multi-straight arm follower disc 5 and a outrigger spoke wheel unit; the variable diameter drive servo is fixedly connected to the inner surface of the walking component compartment cover 3, and the variable diameter drive servo is coaxially arranged with the walking component compartment cover 3; the multi-rotor transmission disc 4 is coaxially fixed on the power output shaft of the variable diameter drive servo; the multi-straight arm follower disc 5 is rotatably connected to the inner surface of the walking component compartment barrel 2, and the multi-straight arm follower disc 5 is coaxially arranged with the walking component compartment barrel 2; the outrigger spoke wheel unit is connected between the multi-rotor transmission disc 4 and the multi-straight arm follower disc 5.

[0024] The number of rotary arms of the multi-rotor transmission disc 4, the number of straight arms of the multi-straight-arm follower disc 5, and the number of leg spoke wheel units are the same, and the number is 3 to 6; the rotary arms of the multi-rotor transmission disc 4 are evenly distributed along the circumferential direction; the straight arms of the multi-straight-arm follower disc 5 are evenly distributed along the circumferential direction.

[0025] The leg spoke wheel unit includes a connecting rod 6, a sliding pin 7, a leg slider 8, a spoke wheel base 9, a spring-type telescopic support rod 10, a wheel frame support 11 and a waist drum-shaped roller 12; the inner end of the connecting rod 6 is hinged to the top of the straight arm of the multi-straight arm follower plate 5, and the outer end of the connecting rod 6 is hinged to the inner end of the leg slider 8; an arc-shaped slide groove 13 begins to be provided in the swing arm of the multi-swing arm transmission plate 4, one end of the sliding pin 7 is fixedly connected to the outer end of the connecting rod 6, and the other end of the sliding pin 7 extends into the arc-shaped slide groove 13; a slider guide port 14 is provided on the circumferential wall of the walking component silo 2, and the leg slider 8, the outer end extends through the slider guide port 14 to the outside of the walking assembly silo 2, and the leg slider 8 has only linear sliding freedom relative to the slider guide port 14; the spoke wheel base 9 is fixedly installed on the outer end of the leg slider 8; the number of the spring-type telescopic support rod 10 is at least one, the inner end of the spring-type telescopic support rod 10 is fixedly connected to the spoke wheel base 9, the wheel frame support 11 is fixedly connected to the outer end of the spring-type telescopic support rod 10, and the waist-drum-shaped roller 12 is rotatably connected to the wheel frame support 11; the central axis of the waist-drum-shaped roller 12 has a 45° angle with the central axis of the multi-arm transmission disc 4.

[0026] The auxiliary support assembly includes a walking assembly adapter 15, a universal joint 16, an auxiliary support assembly barrel 17, an auxiliary support rod 18, an auxiliary support spring 19, a driven support roller 20 and a spray assembly adapter 21; the walking drive motor 1 is fixedly connected to the front surface of the walking assembly adapter 15, and the walking drive motor 1 and the walking assembly adapter 15 are coaxially arranged; the front end of the universal joint 16 is fixedly connected to the rear surface of the walking assembly adapter 15, and the rear end of the universal joint 16 is fixedly connected to the front end of the auxiliary support assembly barrel 17, and the spray assembly adapter 21 is fixedly connected to the rear end of the auxiliary support assembly barrel 17; the walking assembly adapter The connecting seat 15, the universal joint 16, the auxiliary support assembly cylinder 17 and the spray assembly adapter 21 are coaxially arranged; the number of the auxiliary support rods 18 is 3 to 6, and the auxiliary support rods 18 are evenly distributed along the circumference of the auxiliary support assembly cylinder 17. The inner end of the auxiliary support rod 18 is hinged to the auxiliary support assembly cylinder 17, and the driven support roller 20 is rotatably connected to the outer end of the auxiliary support rod 18; one end of the auxiliary support spring 19 is connected to the middle of the auxiliary support rod 18, and the other end of the auxiliary support spring 19 is connected to the auxiliary support assembly cylinder 17; the auxiliary support assembly cylinder 17 serves as the central control chamber of the pipeline inner diameter adaptive painting robot.

[0027] The spraying assembly includes a rotary spraying drive motor 22, a spraying assembly silo 23, a spraying assembly silo cover 24, a paint nozzle 25, a paint storage tank and a paint delivery pump; the rotary spraying drive motor 22 is located outside the spraying assembly silo 23, the rotary spraying drive motor 22 is fixedly connected to the spraying assembly adapter 21, the rotary spraying drive motor 22 and the spraying assembly adapter 21 are coaxially arranged, and the power output shaft of the rotary spraying drive motor 22 is fixedly connected to the bottom plate of the spraying assembly silo 23, The spray assembly silo 23 is coaxially arranged with the rotary spray drive motor 22; the spray assembly silo cover 24 is coaxially fixed at the silo mouth of the spray assembly silo 23; the paint nozzle 25 is fixedly installed on the circumferential silo wall of the spray assembly silo 23; the paint storage tank and the paint delivery pump are arranged in parallel inside the spray assembly silo 23, the paint storage tank is used to store anti-corrosion paint, the discharge port of the paint storage tank is connected to the feed port of the paint delivery pump, and the discharge port of the paint delivery pump is connected to the paint nozzle 25.

[0028] The following describes the one-time use process of the utility model in conjunction with the accompanying drawings:

[0029] In this embodiment, the number of the rotary arms of the multi-rotor-arm transmission plate 4, the number of the straight arms of the multi-straight-arm follower plate 5, and the number of the leg spoke wheel units are all 6; the number of the auxiliary support rods 18 is 3.

[0030] Outside the pipeline, the spray assembly bin cover 24 is first opened, and the anti-corrosion paint is injected into the paint storage tank inside the spray assembly silo 23, and then the spray assembly bin cover 24 is closed.

[0031] The pipeline inner diameter adaptive painting robot of the present invention is sent into the pipeline as a whole, with the walking component in front and the spraying component in the back. Under the thrust of the auxiliary support spring 19, the auxiliary support rod 18 of the auxiliary support assembly and the driven support roller 20 at the top of the auxiliary support rod 18 adaptively lean against the inner wall of the pipeline.

[0032] Start the variable diameter drive servo to drive the multi-arm transmission disc 4 to rotate. During the rotational motion, the arc-shaped slideway groove 13 in the swing arm of the multi-arm transmission disc 4 will drive the sliding pin 7 to translate radially along the walking component silo 2 and move the sliding pin 7 from the center side of the multi-arm transmission disc 4 to the circumferential side.

[0033] During the translational movement of the sliding pin 7, the support leg slider 8 will be driven to translate synchronously along the radial direction of the walking assembly silo 2 along the slider guide opening 14, and at the same time, the multi-straight arm follower plate 5 will be driven to follow the rotation through the connecting rod 6.

[0034] As the support leg slider 8 moves, the spoke wheel base 9, the spring-type telescopic support rod 10, the wheel frame support 11 and the waist-drum-shaped roller 12 at the outer end of the support leg slider 8 will move as a whole until the waist-drum-shaped roller 12 is in contact with the inner wall of the pipe. At this time, the pipeline inner diameter adaptive painting robot of the present invention is installed in the pipe and is adapted to the inner diameter of the pipe.

[0035] Start the travel drive motor 1 to drive the combination of the travel component silo 2, the travel component silo cover 3 and the variable diameter leg spoke wheel mechanism to rotate synchronously. At this time, the waist drum-shaped roller 12 will synchronously generate a forward tangential component force, thereby achieving the purpose of axial movement along the pipeline while driving the combination of the travel component silo 2, the travel component silo cover 3 and the variable diameter leg spoke wheel mechanism to rotate.

[0036] Start the rotary spray drive motor 22 to drive the combination of the spray component silo 23, the spray component silo cover 24, the paint nozzle 25, the paint storage tank and the paint delivery pump to rotate synchronously. At this time, the movement trajectory of the paint nozzle 25 relative to the inner wall of the pipeline is a spiral line. Then start the paint delivery pump. Under the pumping action of the paint delivery pump, the anti-corrosion paint stored in the paint storage tank enters the paint nozzle 25 through the paint delivery pump, and is finally sprayed onto the inner wall of the pipeline through the paint nozzle 25, thereby realizing the automatic spraying operation of the anti-corrosion paint on the inner wall of the pipeline.

[0037] The solutions in the embodiments are not intended to limit the protection scope of the present invention. All equivalent implementations or changes that do not depart from the protection scope of the present invention are included in the protection scope of the present invention.

Claims

1. A pipe inner diameter adaptive painting robot, characterized by: It includes a walking component, an auxiliary support component and a spraying component; the walking component adopts a Mecanum wheel structure, and the walking component is arranged at the front end of the auxiliary support component; the spraying component adopts a self-rotating spraying structure, and the spraying component is arranged at the rear end of the auxiliary support component.

2. The pipeline inner diameter adaptive painting robot according to claim 1, characterized in that: The walking assembly includes a walking drive motor, a walking assembly silo, a walking assembly silo cover and a variable diameter leg spoke wheel mechanism; the walking drive motor is located outside the walking assembly silo, the walking drive motor and the walking assembly silo are coaxially arranged, and the power output shaft of the walking drive motor is fixedly connected to the bottom plate of the walking assembly silo; the walking assembly silo cover is coaxially fixed at the barrel mouth of the walking assembly silo; the variable diameter leg spoke wheel mechanism is located inside the walking assembly silo, and the roller end of the variable diameter leg spoke wheel mechanism extends to the outside of the walking assembly silo.

3. The pipeline inner diameter adaptive painting robot according to claim 2, characterized in that: The variable diameter support leg spoke wheel mechanism includes a variable diameter drive servo, a multi-rotor arm transmission plate, a multi-straight arm follower plate and a support leg spoke wheel unit; the variable diameter drive servo is fixedly connected to the inner surface of the walking component compartment cover, and the variable diameter drive servo and the walking component compartment cover are coaxially arranged; the multi-rotor arm transmission plate is coaxially fixed on the power output shaft of the variable diameter drive servo; the multi-straight arm follower plate is rotatably connected to the inner surface of the walking component compartment barrel, and the multi-straight arm follower plate is coaxially arranged with the walking component compartment barrel; the support leg spoke wheel unit is connected between the multi-rotor arm transmission plate and the multi-straight arm follower plate.

4. The pipeline inner diameter adaptive painting robot according to claim 3, characterized in that: The number of rotary arms of the multi-rotor-arm transmission disc, the number of straight arms of the multi-straight-arm follower disc, and the number of leg spoke wheel units are the same, and the number is 3 to 6; the rotary arms of the multi-rotor-arm transmission disc are evenly distributed along the circumferential direction; the straight arms of the multi-straight-arm follower disc are evenly distributed along the circumferential direction.

5. The pipeline inner diameter adaptive painting robot according to claim 3, characterized in that: The leg spoke wheel unit includes a connecting rod, a sliding pin, a leg slider, a spoke wheel base, a spring-type telescopic support rod, a wheel frame support and a waist drum-shaped roller; the inner end of the connecting rod is hinged to the top of the straight arm of the multi-straight arm follower plate, and the outer end of the connecting rod is hinged to the inner end of the leg slider; an arc-shaped slide groove begins in the swing arm of the multi-swing arm transmission plate, and one end of the sliding pin is fixedly connected to the outer end of the connecting rod, and the other end of the sliding pin extends into the arc-shaped slide groove; a slider guide port is opened on the circumferential wall of the walking component silo, and the leg slider The outer end extends through the slider guide port to the outside of the walking assembly silo, and the leg slider has only linear sliding freedom relative to the slider guide port; the spoke wheel base is fixedly installed on the outer end of the leg slider; the number of the spring-type telescopic support rod is at least one, the inner end of the spring-type telescopic support rod is fixedly connected to the spoke wheel base, the wheel frame support is fixedly connected to the outer end of the spring-type telescopic support rod, and the waist-drum-shaped roller is rotatably connected to the wheel frame support; the central axis of the waist-drum-shaped roller and the central axis of the multi-arm transmission disc have an angle of 45°.

6. The pipeline inner diameter adaptive painting robot according to claim 2, characterized in that: The auxiliary support assembly includes a walking assembly adapter, a universal joint, an auxiliary support assembly silo, an auxiliary support rod, an auxiliary support spring, a driven support roller and a spray assembly adapter; The walking drive motor is fixedly connected to the front surface of the walking component adapter, and the walking drive motor and the walking component adapter are coaxially arranged; the front end of the universal joint is fixedly connected to the rear surface of the walking component adapter, and the rear end of the universal joint is fixedly connected to the front end of the auxiliary support component cylinder, and the spraying component adapter is fixedly connected to the rear end of the auxiliary support component cylinder; the walking component adapter, the universal joint, the auxiliary support component cylinder and the spraying component adapter are coaxially arranged; the number of the auxiliary support rods is 3 to 6, and the auxiliary support rods are evenly distributed along the circumference of the auxiliary support component cylinder, the inner end of the auxiliary support rod is hinged to the auxiliary support component cylinder, and the driven support roller is rotatably connected to the outer end of the auxiliary support rod; one end of the auxiliary support spring is connected to the middle of the auxiliary support rod, and the other end of the auxiliary support spring is connected to the auxiliary support component cylinder; the auxiliary support component cylinder serves as the central control warehouse of the pipeline inner diameter adaptive painting robot.

7. The pipeline inner diameter adaptive painting robot according to claim 6, characterized in that: The spray assembly includes a rotary spraying drive motor, a spray assembly silo, a spray assembly silo cover, a paint nozzle, a paint storage tank and a paint delivery pump; the rotary spraying drive motor is located outside the spray assembly silo, the rotary spraying drive motor is fixedly connected to the spray assembly adapter, the rotary spraying drive motor and the spray assembly adapter are coaxially arranged, the power output shaft of the rotary spraying drive motor is fixedly connected to the bottom plate of the spray assembly silo, and the spray assembly silo and the rotary spraying drive motor are coaxially arranged; the spray assembly silo cover is coaxially fixed at the barrel mouth of the spray assembly silo; the paint nozzle is fixedly installed on the circumferential silo wall of the spray assembly silo; the paint storage tank and the paint delivery pump are arranged side by side inside the spray assembly silo, the paint storage tank is used to store anti-corrosion paint, the discharge port of the paint storage tank is connected to the feed port of the paint delivery pump, and the discharge port of the paint delivery pump is connected to the paint nozzle.

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