Pipe cold straightening device

Abstract

The invention discloses a pipe cold straightening device. The pipe cold straightening device comprises a treadle-type air-driven hydraulic pump, a single-acting hydraulic cylinder, a pipe cold straightening base, an upper pressing block, a steel pipe and hooks. The hooks are arranged at the positions, close to the two ends, of the lower side of the pipe cold straightening base separately. The steel pipe is hung on the hooks. The single-acting hydraulic cylinder is fixed to the middle part of the pipe cold straightening base. A piston rod of the single-acting hydraulic cylinder penetrates out of the lower side of the pipe cold straightening base. The upper pressing block is fixed to the tail end of the piston rod and used for pressing a deformation area of the steel pipe. The single-actinghydraulic cylinder is connected to the treadle-type air-driven hydraulic pump through a pipeline in a sealed mode. The pipe cold straightening device is simple in structural design, portable, capableof being moved easily, suitable for correcting and straightening pipes of different pipe diameters, easy to operate, high in efficiency, capable of improving the work environment of workers, good in correcting and straightening quality and capable of relieving labor intensity of the workers.

Description

technical field [0001] The invention belongs to the technical field of pipeline processing, and in particular relates to a pipeline cold correction device. Background technique [0002] The pipes used in boilers and pressure vessels need to be straightened due to deformation during welding, heat treatment or processing during the manufacturing process. The conventional process is through thermal correction, that is, after heating the pipe to a limited temperature, use external force to correct the specified size. The efficiency is extremely low. After the thermal correction is completed, new deformation will occur due to thermal expansion and contraction. Workers must have rich operating experience to complete the thermal correction. Calibration is also prone to burn accidents in terms of safety. Contents of the invention [0003] The object of the present invention is to propose a pipe cold correction device, which overcomes the above-mentioned deficiencies of the prior ...

AI Technical Summary

Problems solved by technology

The conventional process is through thermal correction, that is, after heating the pipe to a limited temperature, use external force to correct the specified size. The efficiency is extremely low. After the thermal correction is completed, new deformation will occur due to thermal expansion and contraction. Workers must have rich operating experience to complete the thermal correction. Calibration, safety is also prone to burn accidents

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