cold expander

Abstract

The invention relates to a cold expanding former, which comprises a cylindrical sleeve, a handle core and at least one ball. The handle core is arranged in the sleeve; the sleeve is provided with at least one mounting hole penetrating through the outer wall of the sleeve; and the inner wall of the sleeve is provided with first threads. The handle core comprises an extrusion part, a locking part and a handle part, wherein the outer wall of the locking part is provided with second threads matched with the first threads; the front end of the locking part is connected with the extrusion part in a fastening manner; the rear end of the locking part is connected with the handle part in the fastening manner; the extrusion part is a cone of which the front part is small and the rear part is big; and the balls are movably arranged between the at least one mounting hole and the extrusion part of the handle core. The cold expanding former has the advantages that the structure is simple, the manufacturing cost is low and the operation is convenient, and bulges of which the structures are similar to a copper ring structure can be easily processed out in heat conduction pipes or other metal pipes. The cold expanding former is used for connecting pipelines, and intra-industry problems which cannot be solved all the time are solved.

Description

technical field [0001] The invention relates to pipeline connection technology, in particular to a cold expansion former. Background technique [0002] The connection between the heat pipes of the solar collector is usually connected by joints. In order to avoid the loosening of the joints, generally, a copper ring will be set on the heat pipes to clamp the joints between the two heat pipes. , the copper ring is generally sleeved on the heat pipe, but the metal has the characteristics of thermal expansion and contraction, when the weather becomes cold, the copper ring will loosen and fall out of the joint, causing pipeline leakage; or directly The copper ring is welded on the heat pipe, which is difficult to operate, the cost is high, and the welding stability is poor, and the copper ring is easy to fall off after a long time. [0003] In order to solve this problem, the best way is to set the copper ring and the heat pipe into a one-piece structure, but how to achieve this...

AI Technical Summary

Problems solved by technology

[0002] The connection between the heat pipes of the solar collector is usually connected by a joint. In order to prevent the joint from loosening, generally, a copper ring will be placed on the heat pipe to make the joint clamp between the two heat pipes. , the copper ring is generally set on the heat pipe, but the metal has the characteristics of thermal expansion and contraction, when the weather becomes cold, the copper ring will loosen and fall out of the joint, causing pipeline leakage; or directly put the The copper ring is welded on the heat pipe, the operation is difficult, the cost is high, and the stability of the welding is poor. After a long time, the copper ring is easy to fall off

[0003] In order to solve this problem, the best way is to set the copper ring and the heat pipe into an integrated structure, but how to achieve this goal has always been an unsolvable problem in the industry, and there is no easy-to-operate and low-cost tool Able to realize integral molding of copper ring and heat pipe

Images