Pollution-resistant and explosion-proof rigid suspension insulators for urban rail transit subway catenary

Abstract

The invention relates to a high-voltage electric porcelain insulator, in particular to a stain-resistant burst-preventing rigid suspension insulator for an urban mass transit metro contact network. The insulator comprises an upper metal accessory, a lower metal accessory and an insulator porcelain body. The upper portion of the insulator porcelain body is a solid cylinder, the middle of the lower portion of the insulator porcelain body is of a hollow pit structure, and a canopy type umbrella skirt is arranged in the middle of the insulator porcelain body. The cementing face of the upper metal accessory is matched with the solid cylinder of the upper portion of the insulator porcelain body and is of a cap shape. The cementing face of the lower metal accessory is matched with a hollow pit in the middle of the lower end face of the insulator porcelain body. According to the stain-resistant burst-preventing rigid suspension insulator, the insulator porcelain body, the upper metal accessory and the lower metal accessory are cemented and combined into a whole through a cement adhesive layer, and the overall stretching resistance and the bend resistant mechanical property of the insulator are improved; meanwhile, the phenomenon that burst of the porcelain body of similar products due to inconsistency of expansion coefficients of the metal accessories and the porcelain body occurs easily can be avoided.

Description

technical field [0001] The invention relates to a high-voltage electric porcelain insulator, in particular to a pollution-resistant and burst-proof rigid suspension insulator for urban rail transit subway catenary. Background technique [0002] With the rapid development of my country's national economy and urban construction, the population of first-tier and second-tier cities in my country is increasing. However, due to the lagging of the existing urban infrastructure, urban management cannot keep up with development needs and urban traffic. serious problem of congestion. At present, the problem of traffic congestion is common in first-tier and second-tier cities in my country, which brings huge troubles to the work and life of urban residents. Therefore, solving urban traffic congestion and developing BRT has become a top priority for the national economy and the people's livelihood. [0003] Due to the fast and efficient urban light rail subway and its ability to make f...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the thermal expansion coefficient of the metal accessories is much larger than that of the insulator porcelain body, the metal accessories will generate lateral expansion force after thermal expansion under the working environment of low voltage and high current. This expansion force is the same as that of the ceramic body. The compressive stress cannot be offset, which leads to the bursting of the porcelain body of the "rigid suspension pin insulator". Cause the bolt to produce bending force under the action of tension, because of the influence of bending force, it is easy to cause one side of the porcelain body to burst; 3. The shape design of the product has insufficient creepage distance, low voltage value of anti-corona, heavy salt density The withstand voltage value under pollution is low, the pollution resistance is poor, and it is easy to flashover and breakdown; 4. The solid distance inside the porcelain body of the product is short, and it is very easy to occur when the cement glue at both ends is damp for a long time. Flashover, breakdown phenomenon

[0006] The above-mentioned various design defects lead to low mechanical performance indicators and electrical performance indicators of the product, causing subway trains to fail to run safely on time, and it is difficult to meet the current needs of fast and safe operation of locomotives

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