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Hot bending bent pipe fan-shaped corrosion prevention operation device and corrosion prevention operation method

A technology of operating device and heating device, which is applied in pipeline anti-corrosion/rust protection, damage protection, pipeline protection, etc. It can solve problems affecting product qualification rate, low processing efficiency, disadvantages, etc., to ensure anti-corrosion processing effect and improve operation Efficiency, the effect of improving the pass rate

Active Publication Date: 2012-05-23
SICHUAN GASOLINEEUM CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 1. In order to improve processing efficiency, multiple elbows are usually used to cover the arc-shaped cantilever to carry out anti-corrosion work at the same time, and the curvature of each elbow has errors. If multiple elbows are connected together, there will be a big difference. The roundness is very different, so that when the curved cantilever sends the elbow to the intermediate frequency heating device, powder coating device, winding device and cooling device for processing, the elbow will touch the arc track, which is not conducive to the fact that the elbow is just located in the intermediate frequency The central position of the heating device, powder spraying device, winding device and cooling device requires manual intervention to allow the elbow to pass through and complete the anti-corrosion process, resulting in low processing efficiency and a serious impact on the pass rate of the product;
[0014] 2. At the same time, since multiple elbows are set on the arc cantilever, after the elbow is processed, it is first necessary to disassemble the fixing device of the elbow and the arc cantilever, and then unscrew the arc cantilever out of the elbow to Complete the removal of the processed elbow, which also causes low processing efficiency;
[0015] 3. On the other hand, since the arc-shaped cantilever rotates around the rotary axis through a rotating beam, when the arc-shaped cantilever moves in a circle, the arc-shaped cantilever is subjected to the component force in the centrifugal direction, which is more unfavorable for the elbow to follow the arc-shaped cantilever. When traveling, the elbow will touch the arc track, and it is not conducive to the fact that the elbow is just in the middle of the intermediate frequency heating device, powder spraying device, winding device and cooling device. Manual intervention is required to make the elbow pass smoothly and complete the anti-corrosion process. This also leads to low processing efficiency. Usually, only 4 elbows can be processed in one day, which greatly affects the anti-corrosion processing effect of the elbow and affects the qualified rate of the product.

Method used

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  • Hot bending bent pipe fan-shaped corrosion prevention operation device and corrosion prevention operation method
  • Hot bending bent pipe fan-shaped corrosion prevention operation device and corrosion prevention operation method
  • Hot bending bent pipe fan-shaped corrosion prevention operation device and corrosion prevention operation method

Examples

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Embodiment 1

[0054] The invention discloses a 7-sector anti-corrosion operation device for hot-bending elbows, which includes an intermediate frequency heating device 1, a powder spraying device 2 and a winding device 3, and also includes a rotating shaft 10, on which a rotating shaft 10 is fixedly connected. Driven active arm 9 is provided with a first arc-shaped curved arm 8 on the active arm 9. Driven by the active arm 9, the motion track of the first arc-shaped curved arm 8 is circular, that is, with the rotary shaft 10 as the center of the circle , the active arm 9 is the radius, and the trajectory of the arc-shaped curved arm is a circle. On the rotary shaft 10, the passive arm 12 that rotates around the rotary shaft 10 is hinged, and the passive arm 12 is provided with a second arc-shaped curved arm 13. 7 is fixedly connected between the first curved arm 8 and the second curved arm 13, and the bending ratio between the first curved arm 8, the second curved arm 13 and the curved pipe ...

Embodiment 2

[0056] On the basis of Example 1, the more preferred technical solution of the present invention is: a secondary heating device 4 located outside the winding device 3 is arranged below the circular motion track, and the curved pipe 7 is sequentially connected with the intermediate frequency heating device 1 and the powder The spraying device 2, the winding device 3 and the secondary heating device 4 cooperate. A secondary rolling device 5 located outside the secondary heating device 4 is arranged below the circular motion track, and the elbow 7 is sequentially connected with the intermediate frequency heating device 1, the powder spraying device 2, the winding device 3, the secondary heating device 4 and the The secondary rolling device 5 cooperates. A cooling device is arranged below the circular motion track, and the cooling device is a common water shower or other forms. The secondary heating device 4 is a far infrared heater. The secondary rolling device 5 is a spring wh...

Embodiment 3

[0058] At the same time, the present invention also provides a fan-shaped anti-corrosion operation method for hot-bending bent pipes, which includes the following process steps:

[0059] a. Fix the bent pipe after shot blasting and derusting on the anti-corrosion operation device, that is, connect and fix the bent pipe with the first curved arm and the second curved arm;

[0060] b. The rotation of the rotary shaft drives the first arc-shaped curved arm on the active arm to rotate, and the curved pipe also rotates under the drive of the first curved curved arm. The curved arm, the second arc curved arm and the curved pipe all move on the track;

[0061] c. Pass the elbow through the intermediate frequency heating device, powder spraying device and winding device in sequence to complete the three-layer PE anticorrosion of the elbow. When passing through the intermediate frequency heating, the temperature difference is controlled to be ≤±10°C;

[0062] d. Send the three-layer P...

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Abstract

The invention discloses a hot bending bent pipe fan-shaped corrosion prevention operation device and a corrosion prevention operation method. The device comprises a middle frequency heater, a powder spraying and coating device, a winding device and a rotating shaft, wherein a driving arm driven by the rotation of the rotating shaft is fixedly connected on the rotating shaft, a first arc-shaped bent arm is arranged on the driving arm, a driven arm which rotates around the rotating shaft is hinged on the rotating shaft, a second arc-shaped bent arm is arranged on the driven arm, a bent pipe is fixedly connected between the first arc-shaped bent arm and the second arc-shaped bent arm, the middle frequency heater, the powder spraying and coating device and the winding device are arranged along the position under the circular moving track of the first arc-shaped bent arm, and the bent pipe is sequentially matched with the middle frequency heater, the powder spraying and coating device and the winding device. When the invention is adopted, the efficiency of the corrosion prevention operation of a bend head can be obviously improved, the installation and the dismounting of the bent head are fast and convenient, the corrosion prevention processing effect of the bending head is ensured, and the product qualification rate is improved.

Description

technical field [0001] The invention relates to the technical field of an anti-corrosion operation device and an anti-corrosion operation method for buried steel pipeline bends in the petroleum and petrochemical industry, and at the same time, the invention is also applicable to the anti-corrosion of buried steel pipelines in other industries. Background technique [0002] The external anti-corrosion of domestic oil and gas buried pipeline straight pipes adopts a large number of three-layer structure PE anti-corrosion technology with good anti-corrosion performance and high mechanical strength. The pipeline straight pipe three-layer structure PE anti-corrosion operation line was established, and the domestic pipeline straight pipe three-layer structure PE anti-corrosion technology is in a mature and prosperous period. Due to the particularity of the geometric shape of the elbow itself, the external anti-corrosion of the elbow is mainly covered with asphalt glass cloth, heat-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L58/16
Inventor 何洪勇陈仕清刘斌陆其祥龙江川田华黎方伟毛希元毛斌
Owner SICHUAN GASOLINEEUM CONSTR ENG
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