Insulator type lightning arrester

Abstract

The invention relates to the technical field of power transmission equipment, and discloses an insulator type lightning arrester. The insulator type lightning arrester comprises an iron tower side fitting, a core rod, a wire side fitting and a hollow lightning arrester body with a gap. The iron tower side fitting and the wire side fitting are connected to the two ends of the core rod in a pressed mode respectively, and the core rod is sleeved with the hollow lightning arrester body with the gap. According to the insulator type lightning arrester, the functions of insulators and lightning arresters are achieved at the same time through the structure height equivalent to common insulator bunches, and the good equipment size and the good performance index are achieved.

Description

technical field [0001] The invention relates to the technical field of power transmission equipment, in particular to an insulator type lightning arrester. Background technique [0002] Transmission lines, especially high-voltage transmission lines, need to pay attention to many problems during the overhead laying process, the most common of which are line support, line insulation and overvoltage protection. In order to solve these problems, insulators are used in the prior art to solve the problems of supporting wires and preventing current from returning to the ground, and lightning arresters are used to protect transmission lines and electrical equipment from damage caused by atmospheric overvoltage (usually lightning strike) and operating overvoltage. [0003] Due to the different purposes of the two devices, the performance indicators they pay attention to are quite different. Among them, the insulator is mainly to stretch the line on the support frame (such as a pole ...

AI Technical Summary

Problems solved by technology

However, in the prior art method, due to the large weight and volume of the arrester, not only the load on the line and the iron tower is increased, and the line facilities are complicated, but also because the position of the iron tower cross arm is limited, the installation of the arrester is extremely inconvenient. More equipment will also bring inconvenience to live work and other work

In addition, due to the parallel use of two independent devices, the total number of devices in the system is obviously doubled, resulting in a significant increase in the failure rate of the system, which makes the operation and maintenance workload of the transmission line heavy.

[0005] Although there are still a few studies in the prior art that hope to realize the integration of insulators and arresters, the actual effect is either to slightly improve the withstand voltage performance of the insulator at the expense of shape and stability, or to slightly improve the insulator’s service life. The carrying capacity of the arrester can only be used as an insulator or arrester in a slightly harsh environment, and it is completely impossible to have both functions at the same time

Most typically, the common problems of existing research are: the connection between the fittings at both ends and the mandrel is generally glued or screwed. Due to problems in the connection method and materials, it cannot withstand strong tensile loads, and the seal is also affected. Severe test, can not really achieve both the function of the insulator and the function of the lightning arrester; in addition, the structural height of the equipment is much higher than that of ordinary line insulators

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