Method and device for removing inner surface oxidized iron sheet of steel pipe on line

An iron oxide scale, inner surface technology, applied in workpiece surface treatment equipment, metal processing equipment, metal rolling, etc., can solve the problems of grinding, shot blasting difficulties, overacid corrosion, increase the production cost of steel pipes, etc., to reduce precision. The effect of the whole process and cost increase

Active Publication Date: 2014-12-31
HENGYANG VALIN STEEL TUBE +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the inner surface of steel pipes, inner surface grinding and shot blasting are very difficult, and the efficiency is also very low. Usually, one piece of equipment can only grind 3 to 5 pieces in one shift, which not only prolongs the production cycle of steel pipes, but also increases the production of steel pipes. Cost; the method of pickling to remove the oxide scale on the inner surface of the steel pipe is not effective, and there is over-acid corrosion, which has an impact on the quality of the steel pipe

Method used

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  • Method and device for removing inner surface oxidized iron sheet of steel pipe on line
  • Method and device for removing inner surface oxidized iron sheet of steel pipe on line
  • Method and device for removing inner surface oxidized iron sheet of steel pipe on line

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Embodiment Construction

[0027] As shown in the accompanying drawings, a method for removing iron scale on the inner surface of a steel pipe line, it is the 3rd roller table and the 4th roller table between the step-by-step reheating furnace 9 and the high-pressure water descaling box 8 Daojian designed and manufactured a water spray trolley 1 equipped with a water spray device. The water spray trolley 1 is controlled by the push-pull oil cylinder 1-3 of the trolley, and the nozzle 1-1 is controlled by a high-pressure pneumatic stop valve, which is detected by hot metal at the end of the steel pipe. After the detector 4 is detected, the water spray trolley 1 runs, the high-pressure pneumatic stop valve opens, the nozzle 1-1 on the water spray trolley 1 sprays a certain flow of high-pressure water into the inner hole at the end of the steel pipe, and the water spray trolley 1 follows the steel pipe for a certain distance and closes. After the water spraying time is extended by the PLC program control, t...

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Abstract

The invention relates to a method and a device for removing an inner surface oxidized iron sheet of a steel pipe on line. A device for removing an inner surface oxidized iron sheet of a steel pipe from the tail of the steel pipe is arranged behind a stepping type reheating furnace, and the inlet section of a stepping type cooling bed is provided with a device for removing the inner surface oxidized iron sheet of the steel pipe from the head of the steel pipe. After the tail and the head of the steel pipe are detected by a hot metal detector, the device for removing the inner surface oxidized iron sheet of the steel pipe from the tail of the steel pipe sprays high-pressure water to an inner hole of the tail of the steel pipe and removes the oxidized iron sheet of the inner hole of the steel pipe, and the device for removing the inner surface oxidized iron sheet of the steel pipe from the head of the steel pipe sprays high-pressure water and a high-pressure gas to the inner hole of the head of the steel pipe so as to remove oxidized slag retained in the inner hole of the steel pipe. The inner surface oxidized iron sheet of the steel pipe is removed on line behind the stepping type reheating furnace and at the inlet section of the stepping type cooling bed, and the finishing procedure of the rear part of the steel pipe is reduced. The invention not only saves the cost of acid washing, shot blasting and grinding but also improves the production efficiency.

Description

technical field [0001] The invention relates to a method and a device for removing scale on the inner surface of a steel pipe, in particular to a method and a device for removing scale on the inner surface of a steel pipe. Background technique [0002] With the development of the steel pipe industry, users have higher and higher requirements for the quality of steel pipes, especially for high pot pipes. The user proposes to remove the scale on the inner surface of the steel pipe. The purpose of removing the scale on the inner surface of the steel pipe is to check the quality of the inner surface of the steel pipe, and It is important to prevent the inner oxide scale from clogging the pipeline after peeling off. The existing methods for removing the oxide scale on the inner surface of the steel pipe are off-line pickling, shot blasting and inner surface grinding of the steel pipe. Compared with the inner surface of steel pipes, inner surface grinding and shot blasting are ve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B45/04
Inventor 严卫群黄定华张国胜徐俊辉陈绍林
Owner HENGYANG VALIN STEEL TUBE
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