A squirrel-cage type steel pipeline outer anti-corrosion layer stripping device

Abstract

The invention provides a mouse cage type external anticorrosion coating stripping device of a steel pipeline. The device is mainly composed of a power input mechanism, a fixed ring, a movable ring, mouse cage type tool rests, floating type stripping tools and the like. According to the technical scheme, the stripping device is characterized in that the fixed ring, the movable ring and the mouse cage type tool rests are each composed of two semicircular components; the fixed ring is fixed to the outer wall of the pipeline through four clamping blocks which are circumferentially and evenly distributed, and 24 supporting ball bearings are evenly distributed on the side face of the fixed ring through eccentric shafts; circumferential clamping grooves are machined in the inner side of the movable ring, and are clamped on the supporting ball bearings; the mouse cage type tool rests are mounted on the side face of the movable ring, and four to six floating type stripping tools are circumferentially and evenly distributed on the mouse cage type tool rests and are arranged in a staggered manner in the axial direction of the pipeline; and each floating type stripping tool is provided with a diffuse tool wheel; the power input mechanism is fixed to the fixed ring, and a motor or a hydraulic motor serves as power to drive the floating type stripping tools to rotate around the circumferential direction of the pipeline to clear way an external anticorrosion coating of the pipeline. The external anticorrosion coating stripping device is suitable for stripping external anticorrosion coatings of seamless, straight-slit and spiral-slit welding steel pipes, and the aims of reducing the labor intensity and improving the working efficiency are achieved.

Description

technical field [0001] The invention relates to a special tool for steel pipeline construction and emergency repair operations in the fields of petroleum, natural gas, water supply and drainage, etc., in particular to a device for quickly removing / stripping the outer anti-corrosion layer of steel pipelines. Background technique [0002] Steel pipelines in the fields of petroleum, natural gas, water supply and drainage are usually buried underground. In order to avoid rapid corrosion and failure of the pipe body, the outer wall of the pipe is usually coated with different types of petroleum asphalt, three-layer polyethylene (3PE), double-layer epoxy powder, etc. And thick outer anti-corrosion layer to improve the anti-corrosion performance and service life of buried steel pipelines. However, during pipeline construction or emergency repair, it is necessary to completely remove the anti-corrosion layer of the pipeline before subsequent welding or repair operations can be carri...

AI Technical Summary

Problems solved by technology

[0003] In the current practice of steel pipeline construction or emergency repair operations, there are two main methods for stripping the outer anti-corrosion layer of steel pipelines: one is to use heating or baking with an open flame first, and then use tools such as knives and shovels to peel off by hand When the diameter of the pipeline is large, the stripping method is labor-intensive, low-efficiency, and the cleaning effect is not good. If natural gas leakage occurs in the pipeline, it may cause serious accidents such as fire and explosion; another One is the method of grinding with an angle grinder, which will generate a large amount of grinding dust, which is not conducive to the health of the workers. When the anti-corrosion layer is thicker, the anti-corrosion layer grinding speed is slower and the efficiency is lower, which is difficult to meet Time limit requirements for on-site construction, especially emergency repair and emergency operations

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