A large-diameter pipe inner wall coating device

Abstract

The utility model discloses a kind of large-diameter pipe fittings inner wall coating devices, including base, three groups of supporting legs are provided on the base, the supporting leg connection walking wheel assembly, the end surface of the base is provided with discharge pipe, the other end surface of the base is provided with feed pipe and electrical connector, the feed pipe connects feeding hose, the discharge pipe connects spraying pipe, the rotation connection between the discharge pipe and base, the discharge pipe is driven by first motor, the walking wheel assembly includes a group of driving wheels and two groups of driven wheels, the driving wheel is driven by second motor. The length of the utility model three groups of supporting legs is adjustable, the length of three groups of supporting legs can be adjusted according to the diameter of large-diameter pipe fittings, by controlling the rotation number of first motor output shaft in unit time, to control spraying speed, by controlling the rotation number of second motor output shaft in unit time, to control moving speed, both common cooperation, realize the uniform coating of pipe fittings inner wall.

Description

Technical Field

[0001] This utility model relates to the field of pipe inner wall coating technology, specifically a large-diameter pipe inner wall coating device. Background Technology

[0002] Large-diameter circular pipes refer to circular cross-section pipes with a relatively large outer diameter (usually ≥100mm, though the specific limit varies by industry). They are widely used in fluid transportation, structural support, and industrial equipment. Large-diameter pipe fitting inner wall coating devices are specialized equipment for applying coatings to the inner walls of pipes with large diameters (usually DN300 and above, sometimes even several meters). They are primarily used to achieve uniform coating of functional coatings such as corrosion resistance, wear resistance, heat insulation, or drag reduction.

[0003] Large-diameter pipes have large diameters and long lengths, requiring coating equipment to move over long distances. The moving speed and spraying speed are difficult to control. If the two are not matched, it will lead to quality problems such as uneven coating thickness, missed coating, and sagging, and may even require rework. Utility Model Content

[0004] The purpose of this invention is to provide a coating device for the inner wall of large-diameter pipes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coating device for the inner wall of a large-diameter pipe, comprising a base, three sets of support legs on the base, the support legs being connected to a traveling wheel assembly, a discharge pipe on one end face of the base, and a feed pipe and a power connector on the other end face of the base, the feed pipe being connected to a feeding hose, the discharge pipe being connected to a spraying pipe, the discharge pipe being rotatably connected to the base, the discharge pipe being driven by a first motor, and the traveling wheel assembly comprising a set of driving wheels and two sets of driven wheels, the driving wheels being driven by a second motor.

[0006] The three sets of legs are evenly distributed at intervals along the circumference of the base.

[0007] One set of outriggers is fixedly connected to the drive wheel, and the other two sets of outriggers are fixedly connected to two sets of driven wheels respectively.

[0008] Wherein, one end of the drive wheel is fixedly connected to the first bevel gear, the output shaft of the second motor is fixedly connected to the second bevel gear, and the first bevel gear and the second bevel gear mesh and drive each other, and both the first bevel gear and the second bevel gear are located in the gearbox.

[0009] The discharge pipe is fixedly fitted with a driven gear, the first motor is mounted on the frame, and the output shaft of the first motor is fixedly connected to the driving gear.

[0010] The driving gear meshes with the driven gear for transmission.

[0011] The outrigger includes a sleeve and a telescopic rod. One end of the telescopic rod is slidably embedded in the sleeve, and the sleeve and the telescopic rod are fixedly connected by a tightening screw.

[0012] One end of the spray tube is connected to a nozzle.

[0013] The walking wheel assembly rests against the inner wall of the pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The length of the three sets of support legs of this utility model is adjustable. The length of the three sets of support legs can be adjusted according to the diameter of the large-diameter pipe fitting, so that the walking wheel assembly at the end of the support leg abuts against the inner wall of the pipe fitting to achieve installation and positioning. It is suitable for pipe fittings of different sizes.

[0015] 2. The first motor of this utility model is used to drive the spray pipe to rotate relative to the base to achieve spraying in the circumferential direction of the inner wall of the pipe. The second motor is used to drive the walking wheel assembly to walk along the pipe wall. The spraying speed is controlled by controlling the number of rotations of the output shaft of the first motor per unit time, and the moving speed is controlled by controlling the number of rotations of the output shaft of the second motor per unit time. The two work together to achieve uniform coating on the inner wall of the pipe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one side view of the structure of this utility model; Figure 2 This is a schematic diagram of the structure from another side view of the present invention; Figure 3 This is a schematic diagram illustrating the use of this utility model; Figure 4 for Figure 1 Enlarged view of a portion of area A in the middle; Figure 5 for Figure 1 A magnified view of a section in area B.

[0017] In the diagram: 1. Base; 2. Support leg; 3. Spray pipe; 4. Walking wheel assembly; 5. Feed hose; 11. Discharge pipe; 12. Feed pipe; 13. Driven gear; 14. First motor; 15. Frame; 16. Drive gear; 17. Electrical connector; 21. Sleeve; 22. Telescopic rod; 23. Tightening screw; 31. Nozzle; 41. Drive wheel; 42. Driven wheel; 43. Second motor; 44. Gearbox. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5 This utility model provides a technical solution: a coating device for the inner wall of a large-diameter pipe, including a base 1, three sets of support legs 2 are provided on the base 1, the support legs 2 are connected to a walking wheel assembly 4, a discharge pipe 11 is provided on one end face of the base 1, and a feed pipe 12 and a power connector 17 are provided on the other end face of the base 1. The feed pipe 12 is connected to a feeding hose 5, the discharge pipe 11 is connected to a spraying pipe 3, the discharge pipe 11 is rotatably connected to the base 1, the discharge pipe 11 is driven by a first motor 14, and the walking wheel assembly 4 includes a set of driving wheels 41 and two sets of driven wheels 42, the driving wheels 41 are driven by a second motor 43.

[0020] The lengths of the three sets of support legs 2 are adjustable, and can be adjusted accordingly to the diameter of large-diameter pipe fittings, so that the traveling wheel assembly 4 at the end of the support legs 2 abuts against the inner wall of the pipe fitting, achieving installation positioning. The installation method of the coating device is as follows: Figure 3 As shown, the feeding hose 5 is connected to the feeding system. The pump body delivers the coating material, which enters the base 1 through the feeding hose 5, then enters the discharge pipe 11 through the base 1, and finally enters the spray pipe 3 through the discharge pipe 11. The coating material is then sprayed out through the nozzle 31 onto the inner wall of the pipe, thus achieving coating.

[0021] When the first motor 14 is working, it can drive the discharge pipe 11 to rotate relative to the base 1. The discharge pipe 11 drives the spray pipe 3 to rotate relative to the base 1, realizing spraying in the circumferential direction of the inner wall of the pipe. When the second motor 43 is working, it drives the drive wheel 41 to rotate, generating propulsion force. The two sets of driven wheels 42 follow and maintain balance. The forward or backward movement is achieved by relying on the friction between the walking wheel assembly 4 and the inner wall of the pipe. The spraying speed is controlled by controlling the number of rotations of the output shaft of the first motor 14 per unit time, and the moving speed is controlled by controlling the number of rotations of the output shaft of the second motor 43 per unit time. The two work together to achieve uniform coating of the inner wall of the pipe. The movement of the coating device is driven by the second motor 43 to meet the requirements of long-distance movement.

[0022] Among them, the three sets of support legs 2 are evenly distributed along the circumference of the base 1 to form a three-point positioning support structure.

[0023] One set of support legs 2 is fixedly connected to the drive wheel 41, and the other two sets of support legs 2 are fixedly connected to two sets of driven wheels 42 respectively. The drive wheel 41 rotates under the drive of the second motor 43, and the two sets of driven wheels 42 follow suit.

[0024] One end of the drive wheel 41 is fixedly connected to the first bevel gear, and the output shaft of the second motor 43 is fixedly connected to the second bevel gear. The first bevel gear and the second bevel gear mesh and drive each other. Both the first bevel gear and the second bevel gear are located in the gearbox 44. The bevel gears transmit the power of the input shaft to the output shaft that intersects with the input shaft through the meshing of the conical tooth surfaces, thereby realizing the direction conversion.

[0025] Among them, a driven gear 13 is fixedly sleeved on the discharge pipe 11, the first motor 14 is mounted on the frame 15, and the output shaft of the first motor 14 is fixedly connected to the driving gear 16.

[0026] Among them, the driving gear 16 meshes with the driven gear 13 for transmission. When the first motor 14 is working, it drives the driving gear 16 at one end to rotate. Through the meshing transmission between the teeth, it drives the driven gear 13 to rotate. The driven gear 13 drives the discharge pipe 11 to rotate relative to the base 1.

[0027] The outrigger 2 includes a sleeve 21 and a telescopic rod 22. One end of the telescopic rod 22 is slidably embedded in the sleeve 21, and the sleeve 21 and the telescopic rod 22 are fixedly connected by a tightening screw 23.

[0028] The length of the outrigger 2 is adjustable. Loosening the tightening screw 23 releases the fastening between the sleeve 21 and the telescopic rod 22. Applying a certain external force to the telescopic rod 22 allows for adjustment of the extension length of the telescopic rod 22 relative to the sleeve 21. After adjustment, tightening the tightening screw 23 re-tightens the system. The length of the three sets of outriggers 2 can be adjusted according to the diameter of the large-diameter pipe fitting, so that the traveling wheel assembly 4 at the end of the outrigger 2 abuts against the inner wall of the pipe fitting, achieving installation positioning.

[0029] One end of the spray pipe 3 is connected to the nozzle 31. The paint is transported to the nozzle 31 through the pipe and sprayed through the atomizing plate to cover the inner wall of the pipe.

[0030] The walking wheel assembly 4 rests against the inner wall of the pipe. When the second motor 43 is working, it drives the drive wheel 41 to rotate, generating propulsion force. The walking wheel assembly 4 moves forward or backward by relying on the friction between the walking wheel assembly 4 and the inner wall of the pipe.

[0031] Working principle: During use, the length of the three sets of support legs 2 is adjusted according to the diameter of the large-diameter pipe fitting, so that the walking wheel assembly 4 at the end of the support leg 2 abuts against the inner wall of the pipe fitting for installation and positioning. When the second motor 43 works, it drives the drive wheel 41 to rotate, generating propulsion force. The two sets of driven wheels 42 follow and maintain balance. The forward or backward movement is achieved by the friction between the walking wheel assembly 4 and the inner wall of the pipe fitting. When the first motor 14 works, it drives the discharge pipe 11 to rotate relative to the base 1. The discharge pipe 11 drives the spray pipe 3 to rotate relative to the base 1, realizing the spraying in the circumferential direction of the inner wall of the pipe fitting. The feeding hose 5 is connected to the feeding system, and the paint is transported by the pump body. The paint is transported to the nozzle 31 through the pipeline and sprayed through the atomizing plate to cover the inner wall of the pipe fitting. The spraying speed is controlled by controlling the number of rotations of the output shaft of the first motor 14 per unit time, and the moving speed is controlled by controlling the number of rotations of the output shaft of the second motor 43 per unit time. The two work together to achieve uniform coating of the inner wall of the pipe fitting.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coating device for the inner wall of a large-diameter pipe fitting, comprising a base (1), characterized in that: The base (1) is provided with three sets of support legs (2), the support legs (2) are connected to the walking wheel assembly (4), the base (1) is provided with a discharge pipe (11) on one end face, the base (1) is provided with a feed pipe (12) and a power socket (17) on the other end face, the feed pipe (12) is connected to a feeding hose (5), the discharge pipe (11) is connected to a spray pipe (3), the discharge pipe (11) is rotatably connected to the base (1), the discharge pipe (11) is driven by a first motor (14), the walking wheel assembly (4) includes a set of driving wheels (41) and two sets of driven wheels (42), the driving wheels (41) are driven by a second motor (43).

2. The coating device for the inner wall of a large-diameter pipe according to claim 1, characterized in that: The three sets of legs (2) are evenly distributed along the circumference of the base (1).

3. The coating device for the inner wall of a large-diameter pipe according to claim 1, characterized in that: One set of the outriggers (2) is fixedly connected to the drive wheel (41), and the other two sets of outriggers (2) are fixedly connected to two sets of driven wheels (42).

4. The coating device for the inner wall of a large-diameter pipe according to claim 1, characterized in that: One end of the drive wheel (41) is fixedly connected to the first bevel gear, the output shaft of the second motor (43) is fixedly connected to the second bevel gear, and the first bevel gear and the second bevel gear mesh and drive each other. The first bevel gear and the second bevel gear are both located in the gearbox (44).

5. The coating device for the inner wall of a large-diameter pipe according to claim 1, characterized in that: A driven gear (13) is fixedly sleeved on the discharge pipe (11), and the first motor (14) is mounted on the frame (15). The output shaft of the first motor (14) is fixedly connected to the driving gear (16).

6. The coating device for the inner wall of a large-diameter pipe according to claim 5, characterized in that: The driving gear (16) meshes with the driven gear (13) for transmission.

7. The coating device for the inner wall of a large-diameter pipe according to claim 1, characterized in that: The outrigger (2) includes a sleeve (21) and a telescopic rod (22). One end of the telescopic rod (22) is slidably embedded in the sleeve (21), and the sleeve (21) and the telescopic rod (22) are fixedly connected by a tightening screw (23).

8. The coating device for the inner wall of a large-diameter pipe fitting according to claim 1, characterized in that: One end of the spray pipe (3) is connected to the nozzle (31).

9. The coating device for the inner wall of a large-diameter pipe according to claim 1, characterized in that: The walking wheel assembly (4) rests against the inner wall of the pipe.

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