Welding process of rigid fireproof cable

Abstract

The invention belongs to the technical field of welding processes, and particularly relates to a rigid fireproof cable welding process which comprises the following steps: copper strip uncoiling, clamping, flattening, transverse cutting, lining paper and packaging. According to the step of clamping and conveying, a copper strip which is uncoiled and then runs is conveyed into a leveler in a clamping mode through a pair of rubber face rollers. The welding process of the rigid fireproof cable has the beneficial effects that copper strip uncoiling, copper strip decontamination, copper strip acid pickling, copper pipe forming, conductor emptying, tension stretching and welding are adopted, and the periphery of a copper strip is extruded by utilizing an arc-shaped ring during welding, so that the inner surface of the copper strip is in full contact with the inner surface of a copper core; the welding stability between the inner surface of the copper strip and the inner surface of the copper core is guaranteed, then the machining processes of rolling, annealing, rolling and annealing are conducted, the welding quality is improved, the number of procedures is small, and the welding quality is high.

Description

technical field [0001] The invention relates to the technical field of welding technology, in particular to a welding technology for rigid fireproof cables. Background technique [0002] BTTZ copper core copper sheath magnesia insulated heavy-duty fireproof cable is a seamless copper tube made of copper conductor, inorganic insulating material (magnesia powder) and seamless copper tube or copper strip welded longitudinally. A high-performance fireproof cable processed through multiple drawing or multiple rolling combinations; this cable has the characteristics of high temperature resistance, fire prevention, explosion protection, and non-combustibility (it can run continuously for a long time at 250 ° C, and can also be used as a cable under the extreme state of 1000 ° C). 30min short-time operation) and large carrying capacity, small outer diameter, high mechanical strength, long service life, and generally do not need an independent grounding wire; it has a wide range of a...

AI Technical Summary

Problems solved by technology

This method was first adopted in our country, and its main feature is to fill the gap that our country cannot produce BTTZ cables, and has the advantages of stable performance and high drawing efficiency. The center line body will not produce damage such as cracking, and the pass rate of the pressure test is high, but there are the following defects: the process is complicated and numerous, cannot be formed at one time, and requires a huge space to place various equipment, and also requires a lot of manpower; and the quality of welding Not good, directly caused the poor quality of the cable