Steel pipe inner wall washing gun

Abstract

The invention discloses a steel pipe inner wall washing gun comprising a sand supplying pipe and a high-pressure water supplying pipe located below the sand supplying pipe, wherein the tail end of the sand supplying pipe is connected with a sand separator; the tail end of the high-pressure water supplying pipe is connected with an injection head; the injection head comprises a plurality of independent injection units; and all the injection units are communicated with the sand separator. The sand supplying pipe and the high-pressure water supplying pipe respectively convey mortar and high-pressure water to the injection units; the mortar and the high-pressure water are mixed in nozzles of the injection units to form a grinding material jet flow which moves at a high speed so as to form a linear injection section; and the impact and the washing of the high-speed grinding material injection flow are used so that scales on the inner wall of a steel pipe can be removed in a continuous, efficient and environment-friendly manner. The sand supplying pipe and the high-pressure water supplying pipe are fixed through a pipe clip assembly and a supporting wheel of the pipe clip assembly is contacted with the inner wall of the steel pipe to support a whole de-scaling gun; the de-scaling gun and the inner wall of the steel pipe are in rolling friction, so that the movement resistance is reduced and no barrier exits when the de-scaling gun and the steel pipe move relatively. Furthermore, the height of the supporting wheel is adjustable so as to adapt to the size of the diameter of the steel pipe to be washed.

Description

technical field [0001] The invention relates to the technical field of descaling the inner surface of a steel pipe, in particular to a descaling gun for the inner wall of a steel pipe. Background technique [0002] During the hot rolling or heat treatment process of the steel pipe, the iron element on the surface reacts with the oxygen and water vapor in the air to form a dense covering of metal oxides on the surface, commonly known as "scale skin". The existence of scales has a major impact on the further processing of steel pipes. For example, in the drawing and reaming of steel pipes, it is easy to press the scales into the metal surface, causing surface quality problems. In addition, the hard scales will scratch the core. Rod, which accelerates the wear of the drawing machine or piercing machine. At the same time, it brings difficulties for the anti-rust and anti-corrosion treatment of steel pipes before actual use. Based on this problem, the surface scales of the hot-...

AI Technical Summary

Problems solved by technology

There are many problems in these traditional treatment methods: 1. The waste acid and waste gas generated during pickling has a great impact on the environment and the health of production workers. The production environment is harsh, and the waste acid and waste gas directly affect the surrounding air, water, and soil. Moreover, the processing cost of waste acid is very high; 2. Shot blasting or shot blasting produces a large amount of dust in the production process, causing the working environment in the production workshop to be very bad, and the surface cannot be completely cleaned, and it also causes a lot of dust to form on the surface of the steel. Pitting directly affects the surface quality of the steel; 3. Peeling is the use of multiple sets of grinders to grind the surface of the steel. This method also produces a large amount of dust in production, and the noise is large, and the production environment is harsh

Although abrasive jet technology has been widely used in industry, a good technology and equipment for descaling the inner wall of steel pipes have not been proposed yet.

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