Lining part for pipe bending operation

Abstract

The invention discloses a lining part for pipe bending operation. The lining part comprises at least three outer blocks; all the outer blocks are fixed together through snap spring to form an olive-shaped hollow structure; the cross section of the hollow structure is matched with a pipe in shape; the outer blocks are provided with outer block internal teeth; an inner column is arranged in the hollow structure; the inner column is provided with inner column external teeth; the inner column is divided into a left inner column and a right inner column; and the left inner column and the right inner column are connected by a connecting device comprising a left universal ball, a right universal ball and a connecting rod, thus, by pulling the connecting rod, the inner column moves relative to theouter blocks, the outer blocks are inwardly contracted under the action of the snap spring, and the lining part is pulled out of the pipe. The lining part is simple in structure, when the lining partis tightly attached to the pipe, the lining part is pulled out smoothly after being bent, the inner diameter of a bent area of the pipe is effectively ensured, and the inner wall of the pipe is not liable to be damaged.

Description

Technical field [0001] The invention relates to an inner lining used for pipe bending operations. Background technique [0002] The pipe bender is a tool for bending flexible pipe fittings. Although the conventional pipe bender guarantees the bending radius of the bend pipe, it cannot effectively guarantee the inner diameter at a large angle, especially thin-walled pipe fittings are not suitable for bending, such as thin-walled aluminum-plastic Tube; In addition, the prior art also has a spring tube bender, but when it is tightly attached to the tube, it is not easy to pull out after bending, which cannot effectively protect the inner diameter of the tube bending area and easily damage the inner wall of the tube. Summary of the invention [0003] The purpose of the present invention is to overcome the above shortcomings and provide an inner lining for pipe bending operations, which effectively guarantees the inner diameter of the pipe bending area. [0004] In order to achieve the ...

AI Technical Summary

Problems solved by technology

[0002] The pipe bender is a tool for bending flexible pipe fittings. Although the conventional pipe bender guarantees the bending radius of the bend pipe, it cannot effectively guarantee the inner diameter at a large angle, especially thin-walled pipe fittings are not suitable for bending, such as thin-walled aluminum-plastic In addition, the prior art also has a spring pipe bender, but when it fits tightly with the pipe fitting, it is not easy to pull out after bending, and the inner diameter of the bending area of ​​the pipe fitting cannot be effectively guaranteed, and it is easy to damage the inner wall of the pipe fitting

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