Inner surface and outer surface jet flow descaling system and method for big-diameter metal pipe wall

Abstract

The invention discloses an inner surface and outer surface jet flow descaling system for a big-diameter metal pipe wall, which is characterized by comprising at least one spraying unit, wherein the spraying unit is used for simultaneously spraying mixed jet flow to the inner surface and the outer surface of the metal pipe wall and carrying out descaling; the inner surface and outer surface jet flow descaling system at least comprises two groups of spraying units, wherein one group is an inner spraying subunit used for descaling the inner surface of the metal pipe wall, and the other group is an outer spraying subunit used for descaling the outer surface of the metal pipe wall; the descaling system also comprises an actuating mechanism used for realizing a purpose that the big-diameter metal pipe wall carries out spiral motion; and therefore, the big-diameter metal pipe wall realizes the rotating motion around the self axis while axially moving. According to a special arrangement mode of mixed jet flow nozzles and a special motion mode of the big-diameter cold-state metal pipe wall, a continuous efficient mode that roll scales on the inner surface and the outer surface of the big-diameter cold-state metal pipe wall are synchronously removed can be realized so as to satisfy the processing requirement of the post-process.

Description

technical field [0001] The present invention relates to the technical field of metal surface cleaning, in particular, the present invention relates to the technical field of jet descaling on the inner and outer walls of pipes with a large-diameter cold metal circular cross-section, which is used to realize the cleaning of large-diameter cold metal circular pipes. The inner and outer surface scales are cleaned simultaneously with continuous jets. Generally, the diameter of the inner hole is greater than or equal to 150mm, which is called a large diameter pipe. Background technique [0002] During the hot rolling or heat treatment process of metal materials, a dense covering composed of metal oxides will be formed on the surface, commonly known as "scale". The existence of this scale will affect further processing: on the one hand, the material The cracks on the surface of the surface are not easy to be found in advance, so that there are quality problems in the finished prod...

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Problems solved by technology

[0008] By consulting relevant patents, it is also found that foreign countries, especially Japan, Germany and other developed countries of metallurgical technology, although they have proposed numerous continuous jets, brushing and descaling technologies such as Japan JP06108277A discloses the use of acid spray and brush rolls on the continuous cold rolling line The descaling process used in combination, Japan JP55034688A discloses a combination of PV rolling and descaling-mixed abrasive high-pressure jet descaling, Japan JP57142710A, JP57068217A, Japan JP59097711A, and Canada's TMW company has disclosed a series of since 2001 For the removal technology of steel plate surface scales US20080108281 (A1), US20080182486 (A1) and US20090227184 (A1), etc., in addition, Western European US5388602, Japanese patents JP05092231A, JP09085329A and JP2002102915 have not proposed an effective treatment of the surface scale of rods and wires. clearing technique

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