1. Purpose and type
High-voltage line disc-type suspension insulators (hereinafter referred to as insulators) are used for insulation and fixed conductors in high-voltage overhead transmission and distribution lines. A group of insulators is assembled on a line of different voltage levels. Insulators are divided into ordinary types and pollution-resistant types according to their use environment and region. Ordinary insulators are suitable for general areas. If the number of insulators is properly increased, the pollution flashover performance can be improved. Pollution-resistant insulators are divided into bell jar type and double-layer umbrella type according to their shape structure. Pollution-resistant insulators are suitable for industrial dust, chemical industry, saline-alkali, coastal and foggy areas. Different structure types are best for pollution-resistant insulators The scope of use shall be determined after a trial pre-operation.
2. Introduction to the structure
Suspended insulators are made of porcelain parts and iron cap feet made of Portland cement no.525, porcelain sand or quartz sand glue. A thin layer of buffer layer is applied to the surface of the iron cap and steel feet in contact with the adhesive. Elastic padding on top of steel feet. The surface of porcelain parts is generally white glaze. Brown glaze or blue ash glaze can also be applied as required.
3. The surface of the steel feet are all hot-dip galvanized.
The push-pull elastic locking pin of the spherical connection structure has two types of W-type and R-type. They are made of copper, which has good elasticity and corrosion resistance, and is easy to disassemble and assemble. Slotted cylindrical pin and hump-shaped split pin, the former is hot dip galvanized, and the latter is made of steel. The above elastic locking pin. Round sample pins and other parts are supplied complete with the product
Ordinary insulator porcelain has a large gap between the edges of the umbrella group, especially the XP-70 and X-45 type insulators, the rib groove is wide, easy to clean, and the steel foot ball head generally extends out of the porcelain group. Conducive to live work.
The double-layer umbrella has huge dirt-resistant insulators, an open umbrella shape, smooth and edgeless in the group, low dust accumulation rate, and good self-cleaning performance in wind and rain. Bell-type pollution-resistant suspension insulator. It absorbs the structural characteristics of European, American and Japanese anti-fog insulators, and uses the different periods of moisture inside and outside the umbrella and the high-edge discharge under the umbrella. The anti-pollution performance is good. The results of multiple artificial pollution experiments have proved that the pollution Lightning Abi can increase by 20-50% compared with common insulators of the same level.