Portable pipeline automatic circumferential walking device and pipeline processing method

Abstract

The invention discloses a portable pipeline automatic circumferential walking device and a pipeline processing method, which belong to the technical field of pipeline processing and construction. The portable pipeline automatic circumferential walking device consists of a circular rail, a walking mechanism and a control part. The circular rail consists of a rail and a grab for mounting the rail. The portable pipeline automatic circumferential walking device has the characteristics that one type of rail is adaptable to a plurality of types of pipe diameters, and a plurality of types of rails is adaptable to more pipe diameters in a matching mode. The walking mechanism consists of a machine frame, wheels, a chain tensioning mechanism, a driving motor system and a chain. The control part consists of a local controller and a remote controller. The local controller can adjust positive rotation and negative rotation of a motor, and can adjust the walking mechanism to perform clockwise rotation or counterclockwise rotation around a pipeline. The remote controller can control the walking mechanism at a distant place, and is compact and convenient. The portable pipeline automatic circumferential walking device is convenient to mount, has high walking accuracy, is not affected by whether the pipeline has a coating layer or not, and is suitable for meeting requirements on circumferential construction of an onsite pipeline.

Description

technical field [0001] The invention relates to a portable pipeline automatic circular running device and a pipeline processing method, belonging to the technical field of pipeline processing and construction. Background technique [0002] In the processing and construction of pipelines, processing requirements such as cutting, welding, spraying and anticorrosion in the circumferential direction of pipelines are often encountered. For the case where the processing accuracy is not high, manual processing can be used, which is labor-intensive and low-efficiency. But in some occasions with higher requirements, this method obviously cannot meet the requirements. [0003] According to the research on the existing pipe circumferential mechanism, in order to meet the demand of circumferential processing, there are four automatic or semi-automatic methods in the past: [0004] The first is to adopt the human-powered pipeline circular walking mechanism, install the tools actually u...

AI Technical Summary

Problems solved by technology

The key problem of this method is that the walking speed is uncontrollable, and the processing quality is difficult to guarantee, because the quality of welding, cutting and spraying has a strong dependence on the speed. In addition, when the traveling mechanism runs to the bottom of the pipeline or some special The operator may not be able to touch the position, which brings a lot of inconvenience to the actual production;

[0005] The second is the magnetic walking mechanism. This method is simple in structure and is mainly used in the field of pipe cutting. The disadvantages of this method in the field of cutting are as follows: 1. When the ellipticity of the steel pipe is not good, the magnetic trolley moves along the pipe wall. Walking, the walking path changes, especially for large-diameter steel pipes, it is difficult to maintain a good ellipse after welding, and the cutting effect is not good

2. In the case of coating or insulation layer on the surface, the magnetic force is reduced, unable to overcome its own weight, and the magnetic type cannot work

3. When cutting seamed pipes, especially spiral pipes, the magnetic walking track changes, and the magnetic trolley is easy to fall off at the welding seam of the spiral pipe or due to bumps, the wheels of the traveling mechanism deviate

4. Non-magnetic pipes such as stainless steel cannot be cut

5. When the magnetic cutting machine is placed on the pipe, it is difficult to ensure that the cutting body is parallel to the end face of the pipe. The walking deviation is inevitable. The larger the pipe diameter, the greater the deviation. Therefore, the line is often drawn first, and then the worker monitors it in real time during the cutting process. , there is a deviation and then manually intervene, wasting man-hours, and at the same time cannot completely guarantee the quality

[0006] Third, the chain-type automatic walking mechanism, this method 1, there is a gap between the chain nodes and the chain is used as the track, it is difficult to ensure the walking accuracy

The larger the diameter of the steel pipe, the greater the error; 2. The chain must be installed one by one before each work. The chain is loose during the installation process, and the installed chain is easy to fall off. Shortcomings

[0007] The fourth is the positioning block type automatic walking mechanism. This method is accurate in positioning, but the manufacturing cost is high, the equipment is heavy, there are many parts, and the installation is time-consuming and laborious.

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