Pipe surface blowhole eliminating device and pipe surface blowhole eliminating method

Abstract

The invention provides a pipe surface blowhole eliminating device and a pipe surface blowhole eliminating method. An upper pipe wall water scraping device conducts blowhole scraping work on the upperhalf surface of a pipe, and a lower pipe wall water scraping device conducts blowhole scraping work on the lower half surface of the pipe, that is, the blowhole scraping work is conducted on the uppersurface and the lower surface of the pipe respectively, so that the hole diameters of through holes are capable of being greater than the external diameter of the pipe; surface blowholes of the pipeare fully scraped, and the situation that impurities in circulating water scratch the surface of the pipe due to the fact that the sizes of the through holes are too small is avoided; and with the arrangement of a displacement adjustment device, the lower pipe wall water scraping device is adjusted, and relative positions of the through holes of the lower pipe wall water scraping device and the upper pipe wall water scraping device are adapted to the external diameter of the pipe, so that the effect of fully scraping the surface blowholes of the pipe is achieved.

Description

technical field [0001] The invention relates to the technical field of pipe material manufacturing, in particular to a pipe surface air bubble elimination device and a pipe surface air bubble elimination method. Background technique [0002] The general process sequence of the pipe extrusion production process is extrusion, vacuum sizing (cooling at the same time), cooling, pulling, cutting and receiving. Among them, the vacuum sizing link is extremely important to the quality of the pipe. This link is generally to make the pipe through A sizing sleeve of a suitable size (the sizing sleeve can be placed outside the vacuum sizing box or inside the vacuum sizing box), and then enter the vacuum sizing box, supplemented by proper support under a certain degree of vacuum, so that the pipe Shaping, cooling, and sizing to meet appearance and size requirements. [0003] The existing cooling technology is generally spraying and soaking. Compared with spraying, soaking has the advant...

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Problems solved by technology

However, this method still has disadvantages. If the size of the inner hole of the wiper board matches the size of the pipe, the impurities in the circulating water will cause scratches on the surface of the pipe; Because of the buoyancy when traveling, it will generally stick to the top of the inner hole of the wiper blade, such as figure 1 As shown, the maximum gap between the outer circle of the pipe and the inner hole of the wiper appears at the bottom of the wiper, and the air bubbles of the bottom pipe cannot be effectively scraped

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