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

A technology of inner and outer surface, descaling system, applied in the direction of metal rolling, metal rolling, metal processing equipment, etc.

Active Publication Date: 2012-11-07
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] By consulting related 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 Combined descaling process, Japanese JP55034688A discloses a combined PV rolling descaling-mixed abrasive high-pressure jet descaling method, Japanese JP57142710A, JP57068217A, Japanese JP59097711A, and Canada's TMW company have disclosed a series of since 2001 For the removal technology of steel plate surface scale US20080108281 (A1), US20080182486 (A1) and US20090227184 (A1), etc., in addition, Western European US5388602, Japanese patents JP05092231A, JP09085329A and JP2002102915 etc. have not proposed an effective treatment of the surface scale of rods and wires. clearing technique

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0076]Embodiment 1: The pipe wall of the cold steel metal pipe 1 is transported by rollers to the mixed jet descaling area composed of a plurality of spray subunits 5, 6, 7, 8. The spray subunits 5, 6, 7, Each subunit of 8 includes two mixing nozzles, the nozzle models are exactly the same, and the vertical spraying distance between all nozzles and the inner and outer circumferential surfaces of the metal pipe 1 is 5cm, and the inclination angle is 10°, and all subunits 5, 6, 7, and 8 are uniformly arranged in a divergent shape along the circumferential direction of the circular section of the metal pipe 1, and the misalignment angle between each two subunits 5, 6, 7, and 8 along the circumferential direction of the section is 60 °. In this way, the model of the metal pipe wall is a hollow steel pipe 1 with an outer diameter of 800mm and an inner diameter of 600mm. The injection subunits 5, 6, 7, and 8 are all sprayed at a pressure of 50 MPa, so that the outer surface of the ...

Embodiment 2

[0077] Embodiment 2: The pipe wall of the cold steel metal pipe 1 is transported to the mixed jet descaling area composed of a plurality of spray subunits 5 and 6 through the roller table, and each subunit of the spray subunits 5 and 6 contains Two mixing nozzles, the nozzle models are exactly the same, and the vertical spray distance between all nozzles and the inner and outer peripheral surfaces of the metal pipe 1 is 5cm, and the inclination angle is 10°, and all subunits 5 and 6 are arranged in a parallel On a straight line on the wall axis of the metal pipe 1 , the distance between the subunits 5 and 6 is 5 cm on the straight line. In this way, the model of the metal pipe wall is a hollow steel pipe 1 with an outer diameter of 800mm and an inner diameter of 600mm. Both the injection sub-units 5 and 6 are sprayed at a pressure of 50 MPa, so that the outer surface of the metal pipe 1 can be descaled at one time.

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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...

Claims

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Application Information

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IPC IPC(8): B21B45/08
Inventor 段明南
Owner BAOSHAN IRON & STEEL CO LTD
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