Paint spraying device and paint spraying method for outer wall of large-diameter pipeline

Abstract

The invention relates to the technical field of large-diameter pipeline paint spraying corrosion prevention, in particular to a large-diameter pipeline outer wall paint spraying device which comprises four bearing seats, two bearing seats are provided with driving rollers, the other two bearing seats are provided with driven rollers, each driving roller is provided with a roller driving motor, and the driven rollers are provided with driven rollers. A rotating shaft of the driving roller is connected with an output shaft of the roller driving motor through a coupler; the moving trolley slides on the track; a paint barrel, a first spraying pipe and a first high-pressure nozzle; a sand storage cylinder, a second spraying pipe and a second high-pressure nozzle; the driving roller and the driven roller are matched with the track and the moving trolley, so that automatic sand blasting and paint spraying operation is realized, manual sand blasting and paint spraying are avoided, and the harm of sand blasting and paint spraying to a human body is reduced; meanwhile, the paint spraying device for the outer wall of the large-diameter pipeline can be suitable for pipelines of different sizes and can be used in a turnover mode, the construction cost is reduced, and the paint spraying device can be widely applied to the field of large-diameter pipeline manufacturing.

Description

Technical Field

[0001] The invention relates to the technical field of large-diameter pipeline spray paint anti-corrosion, in particular to a large-diameter pipeline outer wall spray paint device and a spray paint method. Background Art

[0002] During the construction process, large-diameter rolled pipes are often encountered. The large-diameter pipes rolled from steel plates usually need to be sandblasted and painted to protect them from being affected by some factors, thereby affecting their service life. In the prior art, sandblasting and painting are usually performed manually, which has low work efficiency and high labor volume. Long-term close contact with paint will also cause certain harm to the health of operators. At the same time, during the operation, due to the large size of the pipes, how to fix and rotate the pipes to cooperate with the sandblasting and painting operations is a problem that needs to be solved on the construction site. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a large-diameter pipe outer wall painting device and a painting method that can avoid manual painting and improve construction efficiency.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A device for spraying paint on the outer wall of a large-diameter pipeline comprises: four bearing seats, wherein two bearing seats are equipped with active rollers, and the other two bearing seats are equipped with driven rollers, each active roller is provided with a roller drive motor, and the rotating shaft of the active roller is connected to the output shaft of the roller drive motor through a coupling; a track and a mobile trolley sliding on the track; a paint cylinder, a first spray pipe and a first high-pressure nozzle; a sand storage cylinder, a second spray pipe and a second high-pressure nozzle; the first high-pressure nozzle and the second high-pressure nozzle are both arranged on the mobile trolley, one end of the first spray pipe is connected to the paint cylinder, and the other end is connected to the first high-pressure nozzle, and one end of the second spray pipe is connected to the sand storage cylinder, and the other end is connected to the second high-pressure nozzle.

[0005] Preferably, a further technical solution of the present invention is: Preferably, a rubber layer is provided on the driving roller and the driven roller.

[0006] Preferably, a height-adjustable bracket is provided on the movable vehicle, and the first high-pressure nozzle and the second high-pressure nozzle are arranged on the height-adjustable bracket.

[0007] The present invention also discloses a method for spraying paint on the outer wall of a large-diameter pipeline, which is performed by using a large-diameter pipeline outer wall spraying paint device, and the specific steps are as follows: S1: First, determine the diameter and length of the pipe to be sandblasted, derusted and painted, then place the four bearing seats and two drive motors in the appropriate positions so that the two active rollers and two driven rollers are located at the four corners of the rectangle to hold up the pipe; S2: Place the pipeline on two active rollers and two driven rollers, and place the track 0.5-1m outside the front side of the pipeline, and slide the mobile trolley onto the track; S3: The second high-pressure nozzle is driven by a mobile trolley to perform sandblasting and rust removal operations. The sandblasting operations include: S301: driving the pipeline to rotate at a uniform speed through the roller driving motor, two active rollers, and two driven rollers; S302: The mobile carriage waits at one position for the pipeline to rotate one circle, that is, after the pipeline at this position has completed a full circle of sandblasting, it moves again. When the mobile carriage drives the second high-pressure nozzle to move from one end of the pipeline to the other end of the pipeline, the entire pipeline is sandblasted; S4: The first high-pressure nozzle is driven by the mobile trolley to perform a painting operation, and the painting operation includes: S401: Under the condition that the pipeline does not rotate, the mobile trolley drives the first high-pressure nozzle to move from one end of the pipeline to the other end of the pipeline, so that the painting is completed at the same horizontal position of the pipeline; S402: driving the pipeline to rotate a certain angle through the roller driving motor, two active rollers, and two driven rollers; S403: Repeat S401 and S402 until the entire circle of the pipeline is painted.

[0008] Preferably, step S2 further includes adjusting the heights of the first high-pressure nozzle and the second high-pressure nozzle according to the size of the pipeline so that the first high-pressure nozzle and the second high-pressure nozzle are located at 1 / 2 of the height of the pipeline.

[0009] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: The invention has a simple construction process. Through the active roller, the driven roller, the track and the mobile trolley, the automated sandblasting and painting operation is realized, thereby avoiding manual sandblasting and painting, and reducing the harm of sandblasting and painting to the human body. At the same time, the large-diameter pipe outer wall painting device can be suitable for pipes of different sizes and can be used in rotation, thereby reducing the construction cost and can be widely used in the field of large-diameter pipe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 2 is a schematic structural diagram of a large diameter pipeline outer wall paint spraying device according to an embodiment of the present invention; Figure 2 1 is a schematic diagram of the top view of the structure of a large diameter pipe outer wall spraying device in an embodiment of the present invention.

[0011] Explanation of the reference numerals: 1. pipeline; 2. roller driving motor; 3. bearing seat; 4. driving roller; 5. driven roller; 6. track; 7. moving trolley; 8. sand storage cylinder; 9. second spray pipe; 10. second high-pressure nozzle. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with specific embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0013] like Figure 1 , Figure 2 As shown, this embodiment provides a large-diameter pipeline outer wall painting device, including: four bearing seats 3, wherein two bearing seats 3 are equipped with active rollers 4, and the other two bearing seats 3 are equipped with driven rollers 5, each active roller 4 is provided with a roller drive motor 2, and the rotating shaft of the active roller 4 is connected to the output shaft of the roller drive motor 2 through a coupling; a track 6 and a moving trolley 7 slidably arranged on the track 6; a paint cylinder, a first spraying pipe and a first high-pressure nozzle; a sand storage cylinder 8, a second spraying pipe 9 and a second high-pressure spray Nozzle 10; the first high-pressure nozzle and the second high-pressure nozzle 10 are both arranged on the mobile trolley 7, one end of the first spraying pipe is connected to the paint cylinder, and the other end is connected to the first high-pressure nozzle, one end of the second spraying pipe 9 is connected to the sand storage cylinder 8, and the other end is connected to the second high-pressure nozzle 10; in order to ensure that the active roller 4 can drive the pipeline 1 to rotate when it rotates, and further increase the friction between the pipeline 1 and the active roller 4 and the driven roller 5, a rubber layer is arranged on the active roller 4 and the driven roller 5; both ends of the track 6 are provided with car stops that limit the mobile trolley 7.

[0014] A height-adjustable bracket is provided on the mobile trolley 7, and the height-adjustable bracket includes a connecting steel pipe and an electric push rod. The electric push rod is vertically arranged and installed on the mobile trolley 7. A connecting steel pipe is provided on the output end of the electric push rod. The first high-pressure nozzle and the second high-pressure nozzle 10 are provided with pipe clamps, which are connected to the connecting steel pipe through the pipe clamps; by adjusting the electric push rod, the height of the first high-pressure nozzle and the second high-pressure nozzle 10 can be adjusted, so as to be suitable for sandblasting and painting operations of pipes 1 of different sizes.

[0015] The present invention also discloses a method for spraying paint on the outer wall of a large-diameter pipeline, which is performed by using a large-diameter pipeline outer wall spraying paint device, and the specific steps are as follows: S1: First, determine the diameter and length of the pipe 1 to be sandblasted, derusted and painted, then place four bearing seats 3 and two drive motors in appropriate positions so that two active rollers 4 and two driven rollers 5 are located at the four corners of the rectangle to support the pipe 1.

[0016] S2: Place the pipeline 1 on two active rollers 4 and two driven rollers, and place the track 6 0.5-1m outside the front side of the pipeline 1, and slide the mobile car 7 onto the track 6; adjust the height of the first high-pressure nozzle and the second high-pressure nozzle 10 according to the size of the pipeline 1, so that the first high-pressure nozzle and the second high-pressure nozzle 10 are located at a height of 11 / 2 of the pipeline; in this embodiment, the track 6 is placed 0.8m from the front side of the pipeline 1.

[0017] S3: The second high-pressure nozzle 10 is driven by the mobile trolley 7 to perform sandblasting and rust removal. The sandblasting range of the second high-pressure nozzle is about 0.5㎡. The sandblasting operation includes; S301: driving the pipeline 1 to rotate at a constant speed through the roller driving motor 2, two active rollers 4, and two driven rollers 5; S302: The mobile carriage 7 waits at one position for the pipe 1 to rotate one circle, that is, after the pipe 1 has completed a full circle of sandblasting at this position, it moves again. When the mobile carriage 7 drives the second high-pressure nozzle 10 to move from one end of the pipe 1 to the other end of the pipe 1, the entire pipe 1 is sandblasted.

[0018] S4: The first high-pressure nozzle is driven by the mobile trolley 7 to perform a painting operation. The painting range of the first high-pressure nozzle is about 0.5 square meters. The painting operation includes: S401: While ensuring that the pipeline 1 does not rotate, the mobile trolley 7 drives the first high-pressure nozzle to move from one end of the pipeline 1 to the other end of the pipeline 1, so that the pipeline 1 is completely sprayed with paint at the same horizontal position; S402: driving the pipeline 1 to rotate a certain angle by means of the roller driving motor 2, two active rollers 4, and two driven rollers 5; S403: Repeat S401 and S402 until the entire circle of pipe 1 is painted.

[0019] During the operation, according to the different sizes of the pipeline 1, the moving speed of the mobile trolley 7 and the rotation speed of the roller drive motor 2 can be adjusted according to the actual working conditions on site; the construction process of the present invention is simple, and the active roller 4 and the driven roller 5 cooperate with the track 6 and the mobile trolley 7 to realize the automated sandblasting and painting operation, avoiding manual sandblasting and painting, and reducing the harm of sandblasting and painting to the human body; at the same time, the outer wall painting device of the large-diameter pipeline 1 can be suitable for pipelines 1 of different sizes, can be used in a turnover manner, reduces the construction cost, and can be widely used in the field of large-diameter pipeline 1 production.

[0020] The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A large diameter pipe outer wall painting device, characterized in that: include: Four bearing seats, wherein two bearing seats are equipped with driving rollers, and the other two bearing seats are equipped with driven rollers, each driving roller is provided with a roller drive motor, and the rotating shaft of the driving roller is connected to the output shaft of the roller drive motor through a coupling; Tracks and mobile trolleys sliding on the tracks; A paint barrel, a first spray pipe and a first high-pressure nozzle; A sand storage cylinder, a second spraying pipe and a second high-pressure nozzle; The first high-pressure nozzle and the second high-pressure nozzle are both arranged on the mobile trolley. One end of the first spraying pipe is connected to the paint cylinder, and the other end is connected to the first high-pressure nozzle. One end of the second spraying pipe is connected to the sand storage cylinder, and the other end is connected to the second high-pressure nozzle.

2. The large diameter pipe outer wall painting device according to claim 1 is characterized in that: The driving roller and the driven roller are provided with rubber layers.

3. The large diameter pipe outer wall painting device according to claim 1 is characterized in that: A height-adjustable bracket is arranged on the mobile trolley, and the first high-pressure nozzle and the second high-pressure nozzle are arranged on the height-adjustable bracket.

4. A method for spraying paint on the outer wall of a large diameter pipeline, characterized in that: The large diameter pipe outer wall painting device according to any one of claims 1 to 3 is used, and the specific steps are as follows: S1: First, determine the diameter and length of the pipe to be sandblasted, derusted and painted, then place the four bearing seats and two drive motors in the appropriate positions so that the two active rollers and two driven rollers are located at the four corners of the rectangle to hold up the pipe; S2: Place the pipeline on two active rollers and two driven rollers, and place the track 0.5-1m outside the front side of the pipeline, and slide the mobile trolley onto the track; S3: The second high-pressure nozzle is driven by a mobile trolley to perform sandblasting and rust removal operations. The sandblasting operations include: S301: driving the pipeline to rotate at a uniform speed through the roller driving motor, two active rollers, and two driven rollers; S302: The mobile carriage waits at one position for the pipeline to rotate one circle, that is, after the pipeline at this position has completed a full circle of sandblasting, it moves again. When the mobile carriage drives the second high-pressure nozzle to move from one end of the pipeline to the other end of the pipeline, the entire pipeline is sandblasted; S4: The first high-pressure nozzle is driven by the mobile trolley to perform a painting operation, and the painting operation includes: S401: Under the condition that the pipeline does not rotate, the mobile trolley drives the first high-pressure nozzle to move from one end of the pipeline to the other end of the pipeline, so that the painting is completed at the same horizontal position of the pipeline; S402: driving the pipeline to rotate a certain angle through the roller driving motor, two active rollers, and two driven rollers; S403: Repeat S401 and S402 until the entire circle of the pipeline is painted.

5. The large diameter pipe outer wall painting device according to claim 4 is characterized in that: Step S2 also includes adjusting the heights of the first high-pressure nozzle and the second high-pressure nozzle according to the size of the pipeline so that the first high-pressure nozzle and the second high-pressure nozzle are located at 1 / 2 of the height of the pipeline.

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