Large-diameter small-bending radius medium frequency pipe bender

Abstract

The invention discloses a large-diameter small-bending radius medium frequency pipe bender. The pipe bender comprises a Iathe bed, wherein the back end of the Iathe bed is provided with a pushing cylinder; the piston rod of the pushing cylinder is connected with a back pusher; the front end of the Iathe bed is provided with a guide roller device and a travelling mechanism supporting base; a spindle mounting base is arranged on the travelling mechanism supporting base in a sliding manner; a spindle is arranged on the spindle mounting base in a rotating manner; the spindle is provided with a rotary arm; the rotary arm is provided with a front chuck and a front chuck adjusting device; the rotary arm is supported on the spindle mounting base through a support roller arranged on the lower end of the rotary arm; and the travelling mechanism supporting base is provided with an anti-bending-moment cylinder, and the anti-bending-moment cylinder is connected with the spindle through a transmission chain. The invention has the following advantages: the thickness reduction of the outer wall of the elbow can be effectively controlled; the large-diameter small-bending radius elbow can be directly prepared without performing secondary welding to the elbow; the manufacturing cost can be reduced, the service life of the elbow can be increased, and the burden for using the elbow of the enterprise can be reduced.

Description

technical field [0001] The invention relates to a pipe bending machine, in particular to an intermediate frequency pipe bending machine with a large diameter and small bending radius. Background technique [0002] Large-diameter and small-bending-radius elbows are required in the steam pipelines of supercritical thermal power generating units. The so-called large-diameter and small-bending radius elbows refer to steel pipes with an outer diameter D greater than 500mm and a bending radius of 2.5D>R≥1.5D. The existing medium-frequency pipe bender cannot bend the above-mentioned large-diameter and small-radius bends. In actual use, only 1.5D pipe benders can be used instead. Welding increases the manufacturing cost of large-diameter and small-bend-radius elbows. At the same time, steam pipes with welds have potential safety hazards in high-temperature and high-pressure environments, which increases the burden on enterprises. Contents of the invention [0003] The technica...

AI Technical Summary

Problems solved by technology

The existing medium-frequency pipe bender cannot bend the above-mentioned large-diameter and small-radius bends. In actual use, only 1.5D pipe benders can be used instead. Welding increases the manufacturing cost of large-diameter and small-bend-radius elbows. At the same time, steam pipes with welded seams have potential safety hazards in high-temperature and high-pressure environments, which increases the burden on enterprises.

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