Fixed rail type epoxy powder spraying robot

Abstract

The invention discloses a fixed rail type epoxy powder spraying robot, and belongs to the technical field of spraying equipment, the fixed rail type epoxy powder spraying robot comprises an annular rail, a rail car matched with the annular rail, a spraying assembly and a powder box, the spraying assembly and the powder box are installed on the rail car, and the spraying assembly comprises an angle-adjustable supporting assembly and a telescopic protection cylinder installed on the angle-adjustable supporting assembly; the telescopic protection barrel extends towards the inner side of the annular track, the outer end of the telescopic protection barrel is connected with an adjustable supporting seat, the adjustable supporting seat comprises a bottom plate and an end plate parallel to the bottom plate, and an electric servo mechanism for controlling the end plate to turn over is installed between the bottom plate and the end plate; a spray pipe is installed on the inner side of the telescopic protection barrel, one end of the spray pipe is connected to the powder box through a powder pump, the other end of the spray pipe is connected to a spray head through a hose, the end, close to the hose, of the spray pipe is fixedly connected to the bottom plate, and the spray head is fixedly connected to the end plate. According to the invention, the distance change between the nozzle of the robot and the workpiece can be reduced, and the product quality is improved.

Description

Technical Field

[0001] This invention belongs to the field of spraying equipment technology, specifically relating to a fixed-track epoxy powder spraying robot. Background Technology

[0002] In the field of corrosion protection for large industrial components, such as oil and gas pipelines, large storage tanks, ship hulls, and steel structures, epoxy powder coating has been widely used as a highly efficient, environmentally friendly, and high-performance surface treatment process. This process uses electrostatic adsorption to uniformly adhere dried epoxy powder coating to the workpiece surface, which is then cured by heat to form a continuous, dense, and robust anti-corrosion coating. Significant progress has been made in fixed-track spraying robots. However, because the robot body and its spraying actuator move along a fixed spatial trajectory, the distance between it and the local surface of the workpiece continuously changes with the undulations of the track. This significant fluctuation in the distance from the nozzle to the workpiece directly leads to uneven coating thickness distribution along the track direction, severely restricting the reliability and consistency of the final product's anti-corrosion quality. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a fixed-track epoxy powder coating robot, which can reduce the change in distance between the robot's nozzle and the workpiece and improve product quality.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] The fixed-track epoxy powder coating robot disclosed in this invention includes a circular track, a track vehicle that cooperates with the circular track, a coating assembly and a powder box mounted on the track vehicle. The coating assembly includes an adjustable angle support assembly and a telescopic protective cylinder mounted on the adjustable angle support assembly. The telescopic protective cylinder extends towards the inside of the circular track, and an adjustable support base is connected to the outer end of the telescopic protective cylinder. The adjustable support base includes a base plate and an end plate arranged parallel to the base plate. An electric servo mechanism for controlling the flipping of the end plate is installed between the base plate and the end plate. A spray pipe is installed on the inside of the telescopic protective cylinder. One end of the spray pipe is connected to the powder box through a powder pump, and the other end of the spray pipe is connected to the nozzle through a hose. The end of the spray pipe near the hose is fixedly connected to the base plate, and the nozzle is fixedly connected to the end plate. Multiple suction cups are evenly spaced along the circumference of the end plate.

[0006] Furthermore, multiple negative pressure hoses are evenly spaced on the outside of the nozzle. The negative pressure hoses are installed on the end plate, and the air inlet of the negative pressure hose is close to the nozzle. The negative pressure hose passes through the inside of the telescopic protective cylinder and is connected to the main pipe. An air pump is installed on the main pipe, and a storage box is connected to the end of the main pipe.

[0007] Furthermore, the electric servo mechanism includes at least three sets of electric cylinders, with both ends of the electric cylinders hinged to the base plate and the end plate, respectively. The electric cylinders are evenly distributed between the base plate and the end plate along the circumference of the base plate.

[0008] Furthermore, the adjustable angle support assembly includes a base, a first support, a rotating shaft, a second support, a hydraulic cylinder, and a third support. The base is fixed on the railcar. The first and second supports are installed on the base at intervals. A rotating shaft is installed on the first support, and the rotating shaft rotates in conjunction with the telescopic protective cylinder. The second support is connected to the third support through the hydraulic cylinder. The third support is installed on the telescopic protective cylinder, and the height of the third support is greater than the height of the rotating shaft.

[0009] Furthermore, the telescopic protective cylinder includes an outer cylinder and an inner cylinder coaxially slidably installed inside the outer cylinder. The lower end of the outer cylinder is installed on an adjustable angle support assembly, and one end of the inner cylinder is slidably installed inside the outer cylinder. A convex rib is formed on the outer side of the inner cylinder, and the convex rib extends along the axial direction of the inner cylinder. A sliding groove that mates with the convex rib is opened on the inner side of the outer cylinder. A rack is provided on the outer side of the inner cylinder, and a mounting platform is fixed on the outer side of the outer cylinder. A motor is installed on the mounting platform, and a gear is connected to the motor. The gear mates with the rack, and a through hole is opened on the cylinder wall of the outer cylinder corresponding to the gear. After the gear passes through the through hole, it meshes with the rack.

[0010] Furthermore, a first resistance wire is wound around the outer side of the outer cylinder, and the first resistance wire is connected to a temperature controller and a power supply.

[0011] Furthermore, a second resistance wire is wound around the outer side of the inner cylinder. The second resistance wire has a certain degree of elasticity and is wound evenly in a spiral shape around the outer side of the inner cylinder. The two ends of the second resistance wire are connected to the outer cylinder and the bottom plate, respectively. The second resistance wire is also connected to the temperature controller and the power supply.

[0012] The beneficial effects of this invention are as follows:

[0013] The fixed-track epoxy powder coating robot disclosed in this invention features a telescopic protective cylinder that allows the spray nozzle to extend and retract. This enables the remote nozzle to be adjusted according to the position of the workpiece, ensuring a consistent distance between the nozzle and the workpiece. This solves the problem of uneven coating thickness distribution along the track direction caused by large fluctuations in the distance between the nozzle and the workpiece.

[0014] In the device disclosed in this invention, the electric servo mechanism can drive the end plate to rotate to adapt to the inclined surface of the workpiece, which facilitates the suction cup to be adsorbed and also allows the spray head to be sprayed as directly as possible onto the surface of the workpiece. By designing the suction cup, the suction cup can be adsorbed onto the surface of the workpiece, so that the position of the spray head can be fixed, reducing shaking during spraying and improving the quality of spraying. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0016] Figure 1 This is a schematic diagram of the structure of the robot of the present invention;

[0017] Figure 2 This is a schematic diagram of the railcar structure;

[0018] Figure 3 This is a structural schematic diagram of the telescopic protective cylinder;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 This is a structural schematic diagram of the adjustable angle support component;

[0021] Figure 6 This is a schematic diagram of the adjustable support base.

[0022] The following components are labeled in the attached diagram: 1. Circular track; 2. Track vehicle; 3. Spraying assembly; 4. Powder box; 5. Adjustable support base; 6. Base plate; 7. End plate; 8. Electric servo mechanism; 9. Spray pipe; 10. Hose; 11. Spray head; 12. Suction cup; 13. Negative pressure hose; 14. Base; 15. First support; 16. Rotating shaft; 17. Second support; 18. Hydraulic cylinder; 19. Third support; 20. Outer cylinder; 21. Inner cylinder; 22. Protrusion; 23. Slide groove; 24. Rack; 25. Mounting platform; 26. Motor; 27. Gear; 28. Through hole; 29. ​​First resistance wire; 30. Second resistance wire. Detailed Implementation

[0023] like Figures 1-6 As shown, the fixed-track epoxy powder coating robot disclosed in this invention includes a circular track 1, a track vehicle 2 that cooperates with the circular track 1, a coating assembly 3 mounted on the track vehicle 2, and a powder tank 4. The circular track 1 is installed on the ground and is circular or elliptical in shape. The track vehicle 2 adopts existing technology and can roll along the circular track 1. The workpiece to be coated is located at the center of the circular track 1, and is coated by the coating assembly 3 mounted on the track vehicle 2. The powder tank 4 is filled with epoxy powder, and a powder pump provides power to supply powder to the spray nozzle 9, thereby enabling coating.

[0024] Specifically, in this invention, the spraying assembly 3 includes an adjustable angle support assembly and a telescopic protective cylinder mounted on the adjustable angle support assembly. The adjustable angle support assembly can adjust the elevation angle of the telescopic protective cylinder, facilitating spraying workpieces of different heights. This invention, by designing a telescopic protective cylinder, can drive the spray nozzle 9 to extend and retract, allowing the distal nozzle 11 to adapt to the position of the workpiece, ensuring a consistent distance between the nozzle 11 and the workpiece. This solves the problem of uneven coating thickness distribution along the track direction due to large fluctuations in the distance between the nozzle and the workpiece. The telescopic protective cylinder extends inward towards the inner side of the annular track 1, and its outer end is connected to an adjustable support base 5. The adjustable support base 5 includes a base plate 6 and an end plate 7 parallel to the base plate 6. An electric servo mechanism 8 is installed between the base plate 6 and the end plate 7 to control the rotation of the end plate 7. The electric servo mechanism 8 can drive the end plate 7 to rotate to adapt to the inclined surface of the workpiece, facilitating suction cup 12 adsorption and allowing the nozzle 11 to spray the workpiece surface as much as possible.

[0025] This invention employs a telescopic protective cylinder, the inner side of which is a retractable, sealed or semi-sealed pipe, completely enclosing the spray nozzle 9 within this pipe. The telescopic cylinder acts as a barrier between the working environment and the spray nozzle 9. Simultaneously, the telescopic cylinder itself possesses extremely strong torsional resistance, ensuring that the connection points at both ends maintain precise alignment throughout the entire stroke, preventing radial offset or rotation. This is of great significance for spraying operations requiring precise alignment.

[0026] A spray pipe 9 is installed inside the telescopic protective cylinder. One end of the spray pipe 9 is connected to the powder box 4 via a powder pump, and the other end of the spray pipe 9 is connected to the nozzle 11 via a hose 10. The end of the spray pipe 9 near the hose 10 is fixedly connected to the base plate 6, and the nozzle 11 is fixedly connected to the end plate 7. Multiple suction cups 12 are evenly spaced along the circumference of the end plate 7. By designing the suction cups 12, they can adhere to the surface of the workpiece, thus fixing the position of the nozzle 11, reducing shaking during spraying, and improving the quality of spraying.

[0027] In this embodiment, multiple negative pressure hoses 13 are evenly spaced on the outer side of the nozzle 9. The negative pressure hoses 13 are mounted on the end plate 7, with their air intakes close to the nozzle 11. The negative pressure hoses 13 pass through the inner side of the telescopic protective cylinder and connect to the main pipe, which is equipped with an air pump. A storage tank is connected to the end of the main pipe. The overall negative pressure of the negative pressure hoses 13 is relatively low. By designing the negative pressure hoses 13, the powder ejected from the edge of the nozzle 11 can be absorbed, reducing the pollution caused by powder overflowing to the workpiece and protecting the overall environment.

[0028] In this embodiment, the electric servo mechanism 8 includes at least three sets of electric cylinders. The two ends of the electric cylinders are hinged to the base plate 6 and the end plate 7, respectively. The electric cylinders are evenly distributed between the base plate 6 and the end plate 7 along the circumference of the base plate 6. By designing the electric cylinders, the angle of the end plate 7 can be adjusted to facilitate the suction cup 12 to perform adsorption.

[0029] In this embodiment, the adjustable angle support assembly includes a base 14, a first support 15, a rotating shaft 16, a second support 17, a hydraulic cylinder 18, and a third support 19. The base 14 is fixed on the railcar 2. The first support 15 and the second support 17 are installed on the base 14 at intervals. The rotating shaft 16 is installed on the first support 15 and rotates with the telescopic protective cylinder. The second support 17 is connected to the third support 19 through the hydraulic cylinder 18. The third support 19 is installed on the telescopic protective cylinder, and the height of the third support 19 is greater than the height of the rotating shaft 16. By extending or shortening the hydraulic cylinder 18, the support angle of the adjustable angle support assembly can be adjusted to meet the actual spraying angle requirements.

[0030] In this embodiment, the telescopic protective cylinder includes an outer cylinder 20 and an inner cylinder 21 coaxially slidably installed inside the outer cylinder 20. The lower end of the outer cylinder 20 is installed on an adjustable angle support assembly. One end of the inner cylinder 21 is slidably installed inside the outer cylinder 20. A protruding rib 22 is formed on the outer side of the inner cylinder 21, and the protruding rib 22 extends along the axial direction of the inner cylinder 21. A sliding groove 23 that mates with the protruding rib 22 is opened on the inner side of the outer cylinder 20. A rack 24 is provided on the outer side of the inner cylinder 21. A mounting platform 25 is fixed on the outer side of the outer cylinder 20. A motor 26 is installed on the mounting platform 25. The motor 26 is connected to a gear 27, which mates with the rack 24. A through hole 28 is opened on the cylinder wall of the outer cylinder 20 corresponding to the gear 27. The gear 27 passes through the through hole 28 and meshes with the rack 24.

[0031] In this embodiment, a first resistance wire 29 is wound around the outer side of the outer cylinder 20. The first resistance wire 29 is connected to a temperature controller and a power supply. Unheated powder particles are cold. When they fly towards the workpiece after being charged by the electrostatic spray gun, the main adsorption force between them and the workpiece surface is electrostatic force. However, if the workpiece surface temperature is low, the electrostatic field may be disrupted or weakened at the moment the powder particles contact the surface, causing some powder to fail to adhere firmly. By designing a heating wire on the outside of the telescopic protective cylinder, the powder can be preheated, enhancing the physical adsorption force between the powder and the workpiece surface. A second resistance wire 30 is wound around the outer side of the inner cylinder 21. The second resistance wire 30 has a certain degree of elasticity and is uniformly spirally wound around the outer side of the inner cylinder 21. The two ends of the second resistance wire 30 are connected to the outer cylinder 20 and the bottom plate 6, respectively. The second resistance wire 30 is also connected to a temperature controller and a power supply. When the inner cylinder 21 extends, it can drive the second resistance wire 30 to extend. Therefore, in the entire length direction of the inner cylinder 21, when the powder passes through the inner cylinder 21, it can be fully preheated, thus ensuring the uniformity of preheating.

[0032] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A fixed-track epoxy powder coating robot, characterized in that: The system includes a circular track, a track vehicle that cooperates with the circular track, a spraying assembly and a powder box mounted on the track vehicle. The spraying assembly includes an adjustable angle support assembly and a telescopic protective cylinder mounted on the adjustable angle support assembly. The telescopic protective cylinder extends inward toward the circular track, and its outer end is connected to an adjustable support base. The adjustable support base includes a base plate and an end plate arranged parallel to the base plate. An electric servo mechanism for controlling the rotation of the end plate is installed between the base plate and the end plate. A spray pipe is installed inside the telescopic protective cylinder. One end of the spray pipe is connected to the powder box via a powder pump, and the other end of the spray pipe is connected to the nozzle via a hose. The end of the spray pipe near the hose is fixedly connected to the base plate, and the nozzle is fixedly connected to the end plate. Multiple suction cups are evenly spaced along the circumference of the end plate.

2. The fixed-track epoxy powder coating robot according to claim 1, characterized in that: Multiple negative pressure hoses are evenly spaced on the outside of the nozzle. The negative pressure hoses are installed on the end plate. The air inlet of the negative pressure hose is close to the nozzle. The negative pressure hose passes through the inside of the telescopic protective cylinder and is connected to the main pipe. An air pump is installed on the main pipe. A storage box is connected to the end of the main pipe.

3. The fixed-track epoxy powder coating robot according to claim 1, characterized in that: The electric servo mechanism includes at least three sets of electric cylinders, with each end of the electric cylinder hinged to the base plate and the end plate, respectively. The electric cylinders are evenly spaced along the circumference of the base plate between the base plate and the end plate.

4. The fixed-track epoxy powder coating robot according to claim 1, characterized in that: The adjustable angle support assembly includes a base, a first support, a rotating shaft, a second support, a hydraulic cylinder, and a third support. The base is fixed on the railcar. The first and second supports are installed on the base at intervals. The rotating shaft is installed on the first support and rotates in conjunction with the telescopic protective cylinder. The second support is connected to the third support through the hydraulic cylinder. The third support is installed on the telescopic protective cylinder, and the height of the third support is greater than the height of the rotating shaft.

5. The fixed-track epoxy powder coating robot according to any one of claims 1-4, characterized in that: The telescopic protective cylinder includes an outer cylinder and an inner cylinder coaxially slidably installed inside the outer cylinder. The lower end of the outer cylinder is installed on an adjustable angle support assembly. One end of the inner cylinder is slidably installed inside the outer cylinder. A convex rib is formed on the outer side of the inner cylinder, extending along the axial direction of the inner cylinder. A sliding groove that mates with the convex rib is opened on the inner side of the outer cylinder. A rack is provided on the outer side of the inner cylinder. A mounting platform is fixed on the outer side of the outer cylinder. A motor is installed on the mounting platform. The motor is connected to a gear, which mates with the rack. A through hole is opened on the outer cylinder wall corresponding to the gear. The gear passes through the through hole and meshes with the rack.

6. The fixed-track epoxy powder coating robot according to claim 5, characterized in that: The outer cylinder is wound with a first resistance wire, which is connected to a temperature controller and a power supply.

7. The fixed-track epoxy powder coating robot according to claim 6, characterized in that: A second resistance wire is wound around the outside of the inner cylinder. The second resistance wire has a certain degree of elasticity and is wound evenly in a spiral shape around the outside of the inner cylinder. The two ends of the second resistance wire are connected to the outer cylinder and the bottom plate, respectively. The second resistance wire is also connected to the temperature controller and the power supply.

Images