PE tube scraper device and method for scraping material on outer wall of PE tube

Abstract

The invention discloses a PE tube scraper device and a method for scraping a material on an outer wall of a PE tube. An inner wall of a first tubular structure is sleeved on the outer wall of the PE tube, and an outer wall of a second tubular structure is in support contact with the inner wall of the PE tube; at least one scraper is arranged on the tube wall of the first tubular structure, the first tubular structure drives the scraper to move on the outer wall of the PE tube in a circumferential direction of the PE tube, and the scraper scrapes off the material on the outer wall of the PE tube during the circumferential movement; and the shape and size of the second tubular structure are matched with the shape and size of the inner wall of the PE tube. This structure is applicable to different PE tubes with different sizes; and at the same time, during use, the condition that the scraped part of the PE tube is deformed due to uneven force and then affects the quality of electrofusionwelding does not occur.

Description

technical field [0001] The invention relates to the field of PE pipes, in particular to a PE pipe scraper device and a method for scraping the outer wall of PE pipes. Background technique [0002] The pipe fittings of polyethylene piping system are mainly divided into two types: hot melt pipe fittings and electrofusion pipe fittings. During construction, electrofusion pipe fittings are less affected by the external environment and human factors, so they have better reliability and are more popular with users. Especially in gas pipe engineering, electrofusion fittings are being used more and more. At the same time, due to the complex production technology, high cost and high sales price of electrofusion pipe fittings, the profit margin of electrofusion pipe fittings manufacturers is also higher, and it has become a hot spot for investment. [0003] Before the PE pipe is fused, the surface oxide layer and contaminants of the part to be welded need to be cleaned up. In actual ...

AI Technical Summary

Problems solved by technology

[0005] (1) Usually, the scope of the oxide layer scraped off by the scraper is half of the length of the welded pipe fittings, and the fixed ring of the device is fixed on the outer wall of the pipe, which can only scrape off a local area. When in use, the position of the fixed ring needs to be adjusted so that It scrapes off the part away from the nozzle, which is not easy to operate;

[0006] (2) The size of the fixing ring of this structure is fixed, which can only be applied to PE pipes of a specific size, and cannot be better applied to pipes of different diameters;

[0007] (3) Secondly, both the fixed structure and the scraper act on the outer wall of the PE pipe. When scraping off, both the fixed structure and the scraper provide a radial force from the outside to the inside, and then the nozzle of the pipe is prone to deformation, easy to Damage the PE pipe and affect its welding quality

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