Marine steel anti-corrosion paint brushing device

Abstract

The present invention discloses a device for applying anti-corrosion paint to marine steel, comprising a first movable body, a second movable body, and a coating body. The second movable body is provided with a metering piston cylinder, which contains a piston, which is provided with a piston rod, and which is connected to the first movable body. The second movable body is provided with a motor, which is connected to a screw, and the first movable body is provided with a threaded sleeve. The first movable body is provided with a first tightening mechanism for tightening against the inner wall of a steel pipe, and the second movable body is provided with a second tightening mechanism for tightening against the inner wall of the steel pipe. The coating body is disposed in the metering piston cylinder, and the coating body is provided with an annular distribution chamber and a paint liquid channel. The annular distribution chamber is connected to the metering piston chamber via a connecting pipe. The annular distribution chamber is also connected to an inlet pipe. A coating ring is provided on one edge of the coating body. The present invention can replace manual application of anti-corrosion paint to the inner wall of marine steel (steel pipes), resolving the difficulty of traditional manual operation.

Description

Technical Field

[0001] This invention relates to a coating device, and more particularly to a device for applying anti-corrosion paint to marine steel. Background Technology

[0002] Due to the highly corrosive nature of the marine environment, the steel used in marine engineering construction (such as the construction of offshore drilling platforms and offshore wind turbine platforms) needs to undergo anti-corrosion treatment to cope with the high corrosiveness of the marine environment.

[0003] Steel pipes are a commonly used type of steel in marine engineering construction. They are frequently used for supporting and constructing offshore platforms. To cope with the highly corrosive marine environment, the outer and inner walls of the steel pipes need to be coated with anti-corrosion paint. Traditionally, when applying anti-corrosion paint to the inner wall of the steel pipe, workers need to climb inside the pipe and manually apply the paint.

[0004] However, the existing manual coating method is difficult to operate due to the cramped space inside the steel pipe. Moreover, manual coating often results in uneven coating, with some areas having a thicker paint film and others having a thinner film, or even not covering the anti-corrosion paint at all. The coating quality is unstable, which affects the anti-corrosion effect of the steel. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for applying anti-corrosion paint to marine steel.

[0006] The objective of this invention is achieved through the following technical solution: a marine steel anti-corrosion paint coating device, comprising a first movable body, a second movable body, and a coating body, wherein the first movable body, the second movable body, and the coating body are all cylindrical structures that match the inner diameter of the steel pipe; a first roller is provided in the circumferential direction of the first movable body, a second roller is provided in the circumferential direction of the second movable body, and a third roller is provided in the circumferential direction of the coating body.

[0007] A metering piston cylinder is provided on the side of the second movable body away from the first movable body. A piston is provided in the metering piston cylinder, and a piston rod is provided on the piston. The piston rod passes through a piston rod through hole provided on the second movable body and is connected to the first movable body. A metering piston cavity is formed between the piston and the end of the metering piston cylinder away from the second movable body. A motor mounting slot is provided on the second movable body, and a motor is provided in the motor mounting slot. A lead screw is connected to the output shaft of the motor. A threaded sleeve corresponding to the lead screw is provided on the first movable body, and the lead screw and the threaded sleeve are threadedly engaged.

[0008] The first moving body is provided with a first clamping mechanism for clamping the inner wall of the steel pipe, and the second moving body is provided with a second clamping mechanism for clamping the inner wall of the steel pipe.

[0009] The coating body is located at the end of the metering piston cylinder away from the second moving body. The coating body has an annular distribution chamber and a paint channel. One end of the paint channel is connected to the annular distribution chamber, and the other end of the paint channel passes through the outer annular surface of the coating body. The annular distribution chamber is connected to the metering piston chamber through a connecting pipe. An input pipe is also connected to the annular distribution chamber. A first one-way valve is provided on the input pipe, and a second one-way valve is provided on the connecting pipe. A coating ring is provided at one edge of the coating body.

[0010] Preferably, the first tightening mechanism includes a stroke control rod and a through groove disposed on the first moving body. The through groove is provided with a first stroke switch and a second stroke switch, which are used to control the operation of the tightening device. The stroke control rod is disposed on the second moving body and passes through the through groove on the first moving body. The stroke control rod is provided with a first protrusion that cooperates with the first stroke switch and a second protrusion that cooperates with the second stroke switch.

[0011] Preferably, the second clamping mechanism includes a movable motor base and a follower rod. A fixed shaft is provided at the bottom of the motor mounting slot. The movable motor base is disc-shaped and rotatably connected to the fixed shaft. The motor is mounted on the movable motor base. A thrust portion is provided on the outer ring surface of the movable motor base, and a thrust surface is provided on the thrust portion. One end of the thrust surface is a low end, and the other end is a high end. The distance between the thrust surface and the movable motor base gradually increases from the low end to the high end. A guide groove is provided on the second moving body. The guide groove is arranged radially along the second moving body. One end of the guide groove passes through the motor mounting slot, and the other end of the guide groove passes through the outer ring surface of the second moving body. The follower rod is slidably connected in the guide groove. One end of the follower rod contacts the thrust surface, and the other end of the follower rod is provided with a pressing component, which faces the inner wall of the steel pipe. A limiting plate is provided at the end of the guide groove near the inner wall of the steel pipe. A stepped surface is provided on the pressing component, and a spring is provided between the stepped surface and the limiting plate.

[0012] The base of the movable motor is provided with a rotation limit groove, and the bottom of the motor mounting groove is provided with a limit shaft, which is located in the rotation limit groove.

[0013] When the motor drives the lead screw to rotate in one direction and moves the first moving body away from the second moving body, the motor's counter-torque causes the movable motor base to rotate to the first angle position. At this time, the end of the follower rod contacts the high end of the thrust surface, causing the pressing component to press tightly against the inner wall of the steel pipe.

[0014] When the motor drives the lead screw to rotate in another direction and brings the first moving body close to the second moving body, the motor's counter-torque causes the movable motor base to rotate to the second angle position. At this time, the end of the follower rod contacts the bottom end on the thrust surface, causing the pressing component to loosen from the inner wall of the steel pipe.

[0015] Preferably, the motor is a servo motor.

[0016] Preferably, the coating ring is made of rubber.

[0017] Preferably, the first moving body is provided with a fixing ring, and the outer side of the fixing ring is provided with bristles that contact the inner wall of the steel pipe.

[0018] Preferably, the second movable body is provided with a cable hole.

[0019] The beneficial effects of this invention are: it can replace manual application of anti-corrosion paint to the inner wall of marine steel (steel pipes), solving the problem of the difficulty of traditional manual operations; moreover, compared with manual application, this device provides more uniform coating and more stable coating quality. The device is small in size, easy to carry and transport, and can meet the needs of on-site construction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 for Figure 1 Enlarged view of section A.

[0022] Figure 3 This is a schematic diagram of the structure of the second moving body.

[0023] Figure 4 This is a schematic diagram of the structure of the movable motor base.

[0024] Figure 5 This is a schematic diagram of a partial structure at the thrust section.

[0025] Figure 6 This is a schematic diagram of the structure of the coating.

[0026] In the diagram: 1. Steel pipe; 2. First moving body; 3. Second moving body; 4. Coating body; 5. Metering piston cylinder; 6. Piston; 7. Piston rod; 8. First roller; 9. Second roller; 10. Third roller; 11. Movable motor base; 12. Follower rod; 13. Pressing component; 14. Motor; 15. Lead screw; 16. Threaded sleeve; 17. Through groove; 18. Stroke control rod; 19. First protrusion; 20. Second protrusion; 21. First limit switch; 22. Second limit switch; 23. Tightening device. 24. Fixing ring; 25. Brush bristles; 26. Annular distribution chamber; 27. Paint channel; 28. Coating ring; 29. ​​Metering piston chamber; 30. Input pipe; 31. Connecting pipe; 32. Motor mounting slot; 33. Fixing shaft; 34. Thrust section; 36. Fixing plate; 37. Spring; 38. Piston rod through hole; 39. Rotation limit groove; 40. Limiting shaft; 45. Cable hole; 46. Center hole; 47. Thrust surface; 48. Low position end; 49. High position end; 50. First check valve; 51. Second check valve. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0028] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0029] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0030] like Figure 1-6As shown, a marine steel anti-corrosion paint coating device includes a first movable body 2, a second movable body 3, and a coating body 4. All three are cylindrical structures that match the inner diameter of a steel pipe 1. A first roller 8 is provided on the circumference of the first movable body 2, a second roller 9 is provided on the circumference of the second movable body 3, and a third roller 10 is provided on the circumference of the coating body 4. The first movable body 2 rolls inside the steel pipe 1 via the first roller 8, the second movable body 3 rolls inside the steel pipe 1 via the second roller 9, and the coating body 4 rolls inside the steel pipe 1 via the third roller 10.

[0031] The first moving body 2 is provided with a fixing ring 24, which is located on the side of the first moving body 2 away from the second moving body 3. The outer side of the fixing ring 24 is provided with bristles 25, which are in contact with the inner wall of the steel pipe 1.

[0032] A metering piston cylinder 9 is provided on the side of the second movable body 3 away from the first movable body 2. One end of the metering piston cylinder 9 is fixed at the center position of the second movable body 3. A piston 6 is provided in the metering piston cylinder 9, and a piston rod 7 is provided on the piston 6. The piston rod 7 passes through a piston rod through hole 38 provided on the second movable body 3 and is connected to the first movable body 2. A metering piston cavity 29 is formed between the piston 6 and the end of the metering piston cylinder 5 away from the second movable body 3.

[0033] The second moving body 3 is provided with a motor mounting slot 32, and a motor 14 is installed in the motor mounting slot 32. In this invention, the motor 14 is a servo motor. A lead screw 15 is connected to the output shaft of the motor 14, and a threaded sleeve 16 corresponding to the lead screw 15 is provided on the first moving body 2, with a threaded engagement between the lead screw 15 and the threaded sleeve 16. The motor 14 drives the lead screw 15 to rotate, thereby causing the first moving body 2 to move closer to or away from the second moving body 3. The second moving body 3 is provided with a cable hole 45.

[0034] The coating body 4 is positioned on the metering piston cylinder 5 at the end furthest from the second moving body 3. The coating body 4 contains an annular distribution chamber 26 and a paint channel 27. One end of the paint channel 27 communicates with the annular distribution chamber 26, and the other end penetrates the outer annular surface of the coating body 4. The paint channels 27 are arranged in a annular array on the coating body 4. The annular distribution chamber 26 is connected to the metering piston chamber 29 via a connecting pipe 31. An input pipe 30 is also connected to the annular distribution chamber 26, and the input pipe 30 is connected to an anti-corrosion paint supply device. The anti-corrosion paint supply device supplies anti-corrosion paint to the metering piston chamber 29 through the input pipe 30. A first one-way valve 50 is provided on the input pipe, and a second one-way valve 51 is provided on the connecting pipe 31.

[0035] A coating ring 28 is provided at one edge of the coating body 4. The coating ring 28 is made of rubber and has a certain degree of flexibility. The coating ring 28 is tapered, and one edge of the coating ring 28 is in contact with the inner wall of the steel pipe 1. The paint channel 27 passes through one end of the outer ring surface of the coating body 4 and is inclined towards the coating ring 28.

[0036] The first moving body 2 is provided with a first clamping mechanism for clamping the inner wall of the steel pipe 1, and the second moving body 3 is provided with a second clamping mechanism for clamping the inner wall of the steel pipe 1.

[0037] The first tightening mechanism includes a stroke control rod 18 and a through groove 17 disposed on the first moving body 2. A first limit switch 21 and a second limit switch 22 are disposed in the through groove 17, and the first and second limit switches 21 and 22 are used to control the operation of the tightening device 23. The stroke control rod 18 is disposed on the second moving body 3 and passes through the through groove 17 on the first moving body 2. The stroke control rod 18 has a first protrusion 19 that cooperates with the first limit switch 21 and a second protrusion 20 that cooperates with the second limit switch 22. In this invention, the tightening device 23 is an electric actuator, and the tightening or loosening of the inner wall of the steel pipe is achieved by the extension and retraction of the electric actuator.

[0038] The second clamping mechanism includes a movable motor base 11 and a follower rod 12. A fixed shaft 33 is provided at the bottom of the motor mounting slot 32. The movable motor base 11 is disc-shaped and rotatably connected to the fixed shaft 33. The motor 14 is mounted on the movable motor base 11. A thrust portion 34 is provided on the outer ring surface of the movable motor base 11, and a thrust surface 47 is provided on the thrust portion 34. One end of the thrust surface 47 is a low end 48, and the other end is a high end 49. The distance between the thrust surface 47 and the movable motor base 11 gradually increases from the low end 48 to the high end 49. A guide groove is provided on the second moving body 3. The guide groove is arranged radially along the second moving body 3. One end of the guide groove passes through the motor mounting slot 32, and the other end of the guide groove passes through the outer ring surface of the second moving body 3. The follower rod 12 is slidably connected in the guide groove. One end of the follower rod 12 contacts the thrust surface 47, and the other end of the follower rod 12 is provided with a pressing component 13, which faces the inner wall of the steel pipe 1. A limiting plate 36 is provided at the end of the guide groove near the inner wall of the steel pipe. A stepped surface is provided on the pressing component 13, and a spring 37 is provided between the stepped surface and the limiting plate 36.

[0039] The movable motor base 11 is provided with a rotation limiting groove 39, and the bottom of the motor mounting groove 32 is provided with a limiting shaft 40, which is located in the rotation limiting groove 39. When the motor 14 drives the lead screw 15 to rotate in one direction and moves the first moving body 2 away from the second moving body 3, the reverse torque of the motor 14 causes the movable motor base 11 to rotate to the first angle position. At this time, the end of the follower rod 12 contacts the high end 49 on the thrust surface 47, so that the pressing component 13 is pressed tightly against the inner wall of the steel pipe 1.

[0040] When motor 14 drives lead screw 15 to rotate in another direction and brings the first moving body 2 close to the second moving body 3, the counter-torque of motor 14 causes the movable motor base 11 to rotate to the second angle position. At this time, the end of follower rod 12 contacts the bottom end 48 on thrust surface 47, causing the pressing component 13 to loosen from the inner wall of steel pipe 1. Through the cooperation of limit shaft 40 and rotation limit groove 39, the movable motor base 11 can only rotate within a certain angle range. The counter-torque of motor 14 refers to the output torque generated by the output shaft of motor 14 when motor 14 drives lead screw 15 to rotate. At this time, the motor body generates a counter-torque that is opposite in direction and the same in magnitude as the output torque. This invention cleverly utilizes the counter-torque of the motor to achieve automatic pressing or loosening of the second moving body.

[0041] In this invention, the motor, the first limit switch, the second limit switch, and the clamping device are all connected to the control system via cables.

[0042] In use, the device is placed inside a steel pipe, and the input pipe is connected to an anti-corrosion paint supply device. The entire device moves axially along the steel pipe via the cooperation of the first and second moving bodies. During this movement, the anti-corrosion paint is applied to the inner wall of the steel pipe by the coating body. The specific process is as follows:

[0043] When moving forward, the motor drives the lead screw to rotate in one direction and moves the first moving body in the forward direction away from the second moving body. During this process, under the action of the motor's counter torque, the second moving body and the pressing component press against the inner wall of the steel pipe, keeping the second moving body stationary, while the pressing device on the first moving body loosens the inner wall of the steel pipe, allowing the first moving body to move forward.

[0044] When the first moving body moves to its far limit position, the second protrusion on the stroke control lever moves to the position of the second stroke switch and triggers the second stroke switch. The second stroke switch transmits a trigger signal to the control system, causing the clamping device to clamp the inner wall of the steel pipe. Then the motor rotates in the other direction. During this process, the first moving body drives the piston rod and piston to move synchronously. The movement of the piston increases the volume of the metering piston chamber, drawing the anti-corrosion paint into the metering piston chamber. The amount of anti-corrosion paint drawn each time is fixed.

[0045] As the motor rotates in the other direction, the first moving body remains stationary because it is pressed against the inner wall of the steel pipe by the clamping device. When the motor rotates in the other direction, the pressing component on the second moving body is released from the inner wall of the steel pipe. The second moving body and the coating body move at a constant speed towards the direction of the first moving body. During this process, the anti-corrosion paint in the metering piston chamber is pressed into the annular distribution chamber by the piston and flows evenly onto the inner wall of the steel pipe through each paint channel. The anti-corrosion paint is applied evenly to the inner wall of the steel pipe by the coating ring during the movement.

[0046] When the first moving body moves to near its limit position, the first protrusion on the stroke control lever moves to the position of the first limit switch and triggers the first limit switch. The first limit switch transmits a trigger signal to the control system, causing the clamping device to loosen from the inner wall of the steel pipe. Then, the motor rotates in the opposite direction again. At this time, under the action of the motor's counter torque, the second moving body and the upper pressing component clamp the inner wall of the steel pipe. The second moving body continues to move away from the first moving body and advance, repeating the above process until the entire inner wall of the steel pipe is coated with anti-corrosion paint. Since the amount of anti-corrosion paint extracted by the metering piston cylinder is also fixed during each fixed forward movement of the first moving body, the corresponding amount of anti-corrosion paint applied along each length is also fixed and uniform. Therefore, when applying anti-corrosion paint using this device, the coating is relatively uniform and the coating quality is good.

[0047] This invention can replace manual application of anti-corrosion paint to the inner walls of marine steel (steel pipes), solving the problem of the difficulty of traditional manual operations. Furthermore, compared to manual application, this device provides more uniform coating and more consistent coating quality. The device is small in size, easy to carry and transport, and can meet the needs of on-site construction.

[0048] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A device for applying anti-corrosion paint to marine steel, characterized in that, It includes a first moving body, a second moving body, and a coating body. The first moving body, the second moving body, and the coating body are all cylindrical structures that match the inner diameter of the steel pipe. The first moving body is provided with a first roller in the circumferential direction, the second moving body is provided with a second roller in the circumferential direction, and the coating body is provided with a third roller in the circumferential direction. A metering piston cylinder is provided on the side of the second movable body away from the first movable body. A piston is provided in the metering piston cylinder, and a piston rod is provided on the piston. The piston rod passes through a piston rod through hole provided on the second movable body and is connected to the first movable body. A metering piston cavity is formed between the piston and the end of the metering piston cylinder away from the second movable body. A motor mounting slot is provided on the second movable body, and a motor is provided in the motor mounting slot. A lead screw is connected to the output shaft of the motor. A threaded sleeve corresponding to the lead screw is provided on the first movable body, and the lead screw and the threaded sleeve are threadedly engaged. The first moving body is equipped with a first clamping mechanism for clamping the inner wall of the steel pipe, and the second moving body is equipped with a second clamping mechanism for clamping the inner wall of the steel pipe. The second clamping mechanism includes a movable motor base and a follower rod. A fixed shaft is provided at the bottom of the motor mounting slot. The movable motor base is disc-shaped and rotatably connected to the fixed shaft. The motor is mounted on the movable motor base. A thrust part is provided on the outer ring surface of the movable motor base, and a thrust surface is provided on the thrust part. One end of the thrust surface is a low end, and the other end is a high end. The distance between the thrust surface and the movable motor base gradually increases from the low end to the high end. The second moving body is equipped with a guide groove. The guide groove is arranged radially along the second moving body. One end of the guide groove passes through the motor mounting slot, and the other end of the guide groove passes through the outer ring surface of the second moving body. The follower rod is slidably connected in the guide groove. One end of the follower rod contacts the thrust surface. The other end of the moving rod is equipped with a pressing component, which faces the inner wall of the steel pipe. A limiting plate is provided at the end of the guide groove near the inner wall of the steel pipe. A stepped surface is provided on the pressing component, and a spring is provided between the stepped surface and the limiting plate. A rotation limiting groove is provided on the movable motor base, and a limiting shaft is provided at the bottom of the motor mounting groove, with the limiting shaft located in the rotation limiting groove. When the motor drives the lead screw to rotate in one direction and moves the first moving body away from the second moving body, the motor's counter-torque causes the movable motor base to rotate to the first angle position. At this time, the end of the moving rod contacts the high end of the thrust surface, causing the pressing component to press tightly against the inner wall of the steel pipe. When the motor drives the lead screw to rotate in another direction and moves the first moving body closer to the second moving body, the motor's counter-torque causes the movable motor base to rotate to the second angle position. At this time, the end of the moving rod contacts the low end of the thrust surface, causing the pressing component to loosen from the inner wall of the steel pipe. The coating body is located at the end of the metering piston cylinder away from the second moving body. The coating body has an annular distribution chamber and a paint channel. One end of the paint channel is connected to the annular distribution chamber, and the other end of the paint channel passes through the outer annular surface of the coating body. The annular distribution chamber is connected to the metering piston chamber through a connecting pipe. An input pipe is also connected to the annular distribution chamber. A first one-way valve is provided on the input pipe, and a second one-way valve is provided on the connecting pipe. A coating ring is provided at one edge of the coating body.

2. The device for applying anti-corrosion paint to marine steel according to claim 1, characterized in that, The first clamping mechanism includes a stroke control rod and a through groove disposed on the first moving body. A first limit switch and a second limit switch are disposed in the through groove. The first limit switch and the second limit switch are used to control the operation of the clamping device. The stroke control rod is disposed on the second moving body and passes through the through groove on the first moving body. The stroke control rod is provided with a first protrusion that cooperates with the first limit switch and a second protrusion that cooperates with the second limit switch.

3. A marine steel anti-corrosion paint coating device according to any one of claims 1-2, characterized in that, The motor is a servo motor.

4. A marine steel anti-corrosion paint coating device according to any one of claims 1-2, characterized in that, The coating ring is made of rubber.

5. A marine steel anti-corrosion paint coating device according to any one of claims 1-2, characterized in that, The first moving body is provided with a fixing ring, and the outer side of the fixing ring is provided with bristles, which are in contact with the inner wall of the steel pipe.

6. A marine steel anti-corrosion paint coating device according to any one of claims 1-2, characterized in that, The second movable body is provided with a cable hole.

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