A device and method for preventing medium and low voltage cable armor from leaking

Abstract

The invention discloses a device and method for preventing missing package of armoring exclusively used in middle and low voltage cables. The device for preventing missing package of armoring exclusively used in the middle and low voltage cables comprises a penetration die; the diameter of the cable passing die is 70 to 80mm; the cable passing die comprises a first die and a second die, which are buckled each other; the inside of the first die and the second die are arranged symmetrically with cable inlet grooves; the length of the cable inlet groove is 50 to 60mm; the cable inlet groove is a cone type, and the cone angle (alpha) is 27 degrees; a diameter bearing groove is smoothly connected with the end of the cable inlet groove; the length of the diameter bearing groove is 100mm, and the diameter of the diameter bearing groove is 10 to 18mm; the front end of the cable passing die is a cone, and the length of the cone is 50mm; the cone angle (beta) at the front of the cable passing die is 21 degrees. By means of the cable passing die exclusively used in the middle and low voltage cables and the application method, the leakage of steel strip is not easy to appear when the medium and low voltage cables are armored, therefore, the defective rate of cable armoring is reduced, and the production efficiency of armored cables is improved.

Description

technical field [0001] The invention relates to the field of cable production control, in particular to the field of wrapping quality control of a steel tape armoring machine in the production process of medium and low voltage cables. Background technique [0002] With the rapid development of society, urban construction is getting faster and faster. In order to create a beautiful urban environment and electricity safety, the amount of overhead cables is less and less, and most of the power lines are laid underground by direct burial. Directly buried cables must be equipped with a protective layer to protect the integrity of the internal structure of the cable, and steel tape armored cables came into being. The production process of spirally wrapping steel tape on the cable core or insulated core with inner liner is called cable steel tape armoring process. The main function of the steel tape armor layer is to prevent the cable from being mechanically damaged during laying ...

AI Technical Summary

Problems solved by technology

The steel tape armor layer of the cable can effectively prevent the mechanical damage caused by the radial pressure to the cable insulation core. The steel tape armor layer of the high-voltage power cable also bears the grounding effect, and the quality of the steel tape armor wrapping is directly affected. The service life of the cable. There are many ground-shaft armoring machines in the cable industry. The equipment is old. Especially when producing low-voltage and medium-voltage small-section cables with a diameter of 0-15mm, there are often steel strip leaks, small-section cable conductors are thinned and broken, and the cable The occurrence of quality accidents such as core insulation damage

The main cause of these quality accidents is that the wire core swings during the wrapping process. Due to the wire core swing, the operator increases the pay-off tension to reduce the wire core swing. Due to the small cross-section of the wire core, the wire core is further thinned or Pulled off, affecting the quality of the core armor

[0003] Therefore, those skilled in the art are committed to developing a device and method for preventing medium and low voltage cable armor from leaking. Swing, and avoid the device that causes the wire core to be thinned by increasing the tension of the pay-off

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