Movable internal and external shot blasting equipment for large-diameter steel pipe

Abstract

The invention discloses movable internal and external shot blasting equipment for a large-diameter steel pipe. The equipment comprises an inner wall force arm and two parallel and correspondingly-arranged axial guide rails, wherein a conveying trolley is arranged between the two axial guide rails; two autorotation mechanisms are arranged on the conveying trolley; a steel pipe is arranged between the two autorotation mechanisms; each autorotation mechanism comprises two vertical plates, a rotating shaft, a round wheel and an autorotation motor; each rotating shaft is rotationally arranged between the two vertical plates; and each round wheel is arranged on the corresponding rotating shaft. According to the equipment, the inner wall and the outer wall of the large-diameter steel pipe can besubjected to rust removal at the same time, the rust removal efficiency is high, steel scraps obtained after shot blasting can be effectively collected, the situation that steel shots enter a shot hopper again due to blockage of a filter screen is avoided, the positions of a first shot blasting mechanism and a second shot blasting mechanism do not need to be moved, the inner surface and the outersurface of the steel pipe can be efficiently and comprehensively polished by driving the steel pipe to rotate and translate, and the automation degree is high.

Description

technical field [0001] The invention relates to the technical field of rust removal for steel pipes, in particular to a mobile type internal and external shot blasting rust removal equipment for large-diameter steel pipes. Background technique [0002] Welding quality is the key to the quality control of LSAW pipes. In order to ensure qualified welding quality, in addition to strict requirements on welding equipment and welding process, the cleanliness of weld bevel is also an important factor to control welding quality, especially the inner weld of straight seam large-diameter steel pipe. The oxide skin and floating rust that fall off during the forming and pressing process of the steel pipe are easy to stay in the groove of the inner weld. If it is not cleaned in time before welding, it is easy to cause defects such as slag inclusions and pores in the inner weld, which reduces the quality of the weld. If unqualified large-diameter steel pipes flow into the market, there w...

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Problems solved by technology

[0003] The patent document (201810230611.3) discloses a large-diameter steel pipe inner wall dust removal and rust removal device. The rotation of the inner wall in the circumferential direction thoroughly removes impurities such as scale and floating rust left in the weld bevel of large-diameter steel pipes, and meets the quality control requirements of the weld seam welding process. The dust and rust removal of the inner wall cannot simultaneously remove the rust on the inner and outer walls of the steel pipe, resulting in a low rust removal efficiency for the steel pipe

At the same time, the existing shot blasting equipment will collect the steel chips on the filter screen when the steel shot and steel chips rebound and collect at the same time. At the same time, the steel shots will continue to fall through the holes of the filter screen for shot blasting. The collection of chips will cause the pores on the surface of the filter to be blocked, so that the rebounded steel shots cannot fall in time for subsequent shot blasting

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