Mandrel cooling device

Abstract

The invention discloses a mandrel cooling device which comprises a box body, multiple groups of support rollers and multiple groups of sprinkling rings, wherein the bottom of the box body is fixed through a support, and water sealing curtains are arranged at ports at two ends of the box body; the multiple groups of support rollers are mounted in the box body and uniformly and linearly arranged in the walking direction of the mandrel in sequence, each support roller in the multiple groups of support rollers comprises a V-shaped roller, a V-shaped support groove, a shoulder pole beam, a rotating shaft and an adjusting mechanism, a rotation center of the shoulder pole beam is fixedly connected with the rotating shaft which is mounted on the box body in a pivot manner and fixedly connected with the adjusting mechanism, the adjusting mechanism is arranged outside the box body, the V-shaped roller and the V-shaped support groove are formed in two ends of the shoulder pole beam respectively, the V-shaped roller comprises two rollers which are oppositely arranged in a V-shaped manner, and the V-shaped support groove is made of soft wear-resisting metal; and multiple groups of sprinkling rings are arranged in the box body, located above the multiple groups of support rollers and communicated with a water way, and further, the sprinkling directions face the mandrel. The mandrel cooling device is applied to a rolled pipe production line, the application range is broad, and the mandrel cooling is uniform and fast.

Description

technical field [0001] The invention relates to a pipe rolling machine, in particular to equipment for cooling a pipe rolling mandrel rod in the production of seamless steel pipes. Background technique [0002] In the production of seamless steel pipes, the mandrel penetrates into the capillary and cooperates with the rolling machine to reduce the wall thickness of the heated capillary to form a waste pipe. During the rolling process, the appearance of the mandrel and the capillary will generate more than 900°C For the rolling equipment that uses a single mandrel for rolling tubes, the mandrel needs to be cooled to about 90°C and then sprayed with lubricant on the outer surface before the next tube rolling. If the mandrel is not cooled properly, the lubricant will not be applied And rolling the pipe will cause quality defects and even production accidents in the waste pipe. [0003] The existing mandrel cooling method is generally cooling by circulating water inside the man...

AI Technical Summary

Problems solved by technology

[0002] In the production of seamless steel pipes, the mandrel penetrates into the capillary and cooperates with the rolling machine to reduce the wall thickness of the heated capillary to form a waste pipe. During the rolling process, the appearance of the mandrel and the capillary will generate more than 900°C For the rolling equipment that uses a single mandrel for rolling tubes, the mandrel needs to be cooled to about 90°C and then sprayed with lubricant on the outer surface before the next tube rolling. If the mandrel is not cooled properly, the lubricant cannot be applied However, rolling the pipe will cause quality defects and even production accidents in the waste pipe.

[0003] The existing mandrel cooling method is generally cooling by circulating water inside the mandrel, but this method will increase the production cost of the mandrel, and the hollow structure of the mandrel is likely to cause deformation under high temperature and pressure, which affects the quality of the waste tube. production quality

Another common method is to transfer the mandrel to other stations by using the gap time between rolling tubes, and then spray water on the surface of the mandrel to cool it. However, due to the short production gap time, the cooling degree of the mandrel is often not enough. , which not only affects the output of the steel pipe, but also tends to cause uneven cooling of the mandrel, which will affect the quality of the product

If a better cooling effect is to be achieved, it is necessary to prolong the spraying time on the surface of the mandrel, which will seriously affect the production efficiency of the rolled tube, and the economy is very poor

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