Water-blocking high-voltage cable with air-blowing optical fiber and temperature-measuring optical fiber arranged in conductor

Abstract

The invention provides a water-blocking high-voltage cable with an air-blowing optical fiber and a temperature measuring optical fiber arranged in a conductor. The air-blowing optical fiber comprises an optical fiber bundle, cured resin and a sheath protection layer. The sheath protection layer has a hollow pipeline structure, and the optical fiber bundle is arranged in the hollow pipeline and extends along the length direction of the hollow pipeline. The hollow pipeline structure is filled with the cured resin. The outer surface of the sheath protection layer is provided with an arc-shaped air blowing groove. The air-blowing optical fiber provided by the invention is simple in structure, light in volume and excellent in high-temperature resistance, the long-term use temperature range of the air-blowing optical fiber can be increased to 300 DEG C, and the requirements that the long-term temperature of a conductor is 95 DEG C, the overload temperature is 110 DEG C and the short-term temperature is 260 DEG C are completely met. The arc-shaped air-blowing groove is arranged on the outer surface of the protective sleeve, so that the area of an air-blowing channel can be reduced, the air-blowing efficiency (for example, the speed of air-blowing the optical fiber can reach 80m / min) is improved, the optical fiber is effectively protected from being damaged, a waterproof effect is achieved, and the service life of the optical fiber is prolonged.

Description

technical field [0001] The invention relates to the field of water-blocking high-voltage cable manufacturing, in particular to a water-blocking high-voltage cable with an air-blown optical fiber and a temperature-measuring optical fiber built in a conductor. Background technique [0002] People's awareness of the safe operation of high-voltage power cables is constantly improving. The real-time temperature of the conductor during the operation of the power cable is the most important monitoring point, and the built-in optical fiber in the conductor can monitor the conductor temperature more accurately. The existing optical fiber with built-in conductor adopts the method of splitting the center of the conductor and adding a metal tube, and blowing into the air-blown optical fiber after the finished product, which has the advantages of simple production method and low cost. [0003] There is a lot of rainfall in southern my country, and the average annual precipitation is gene...

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide an air-blown optical fiber and a water-blocking high-voltage cable with a built-in temperature-measuring optical fiber in order to solve the problem that the existing air-blown optical fiber is not resistant to high temperature and the high-voltage cable with a built-in temperature-measuring optical fiber has poor water resistance. question

Images