detailed description
Insulators are made by bonding ceramic parts and upper and lower metal accessories with adhesive. The contact area between the porcelain end face and the metal accessory adhesive is cushioned with elastic pads. The porcelain adhesive parts adopt structures such as sanding, rolling, and grooving, which have mechanical strength, prevent loosening, and torsion. The surface of porcelain parts is uniformly coated with white glaze, and the surface of metal accessories is coated with gray enamel paint.
The main structure of insulator ceramic parts includes two types: cavity partition (penetrable) structure and solid (non penetrable) structure. Joint adhesive post insulators are generally solid and non penetrable structures. The latter structure improves safety and reliability compared to the previous structure, reducing maintenance and testing workload.
There are two types of ceramic insulator shapes: multi sided or few sided. Multi sided shapes increase the distance along the surface and have better electrical performance than few sided shapes. Except for the gradually phased out external adhesive post insulators, all other products are multi sided shapes.
The internal adhesive structure increases the insulation distance and improves electrical performance due to the metal accessories being glued into the ceramic holes, while also reducing the space occupied during installation. However, since the internal adhesive is not conducive to improving mechanical strength, insulators with high mechanical strength requirements should use joint adhesive (i.e. the upper accessory uses internal adhesive and the lower accessory uses external adhesive).
High voltage line disc-shaped suspended porcelain insulators are used for insulation and fixing wires in high-voltage overhead transmission and distribution lines. They are generally assembled into insulator strings and used on lines of different voltage levels.
Ordinary insulators are suitable for general areas, and increasing the number of insulator pieces appropriately can also improve pollution flashover performance.
Suspended porcelain insulators are made by bonding ceramic parts, iron caps, and steel feet with a cement and quartz sand adhesive of no less than 525 grade. A thin buffer layer is applied to the contact surface between the iron cap and steel foot and the adhesive, and there is an elastic pad on the top of the steel foot. The surface of porcelain pieces is generally painted with white glaze or brown glaze, and other glazes can also be painted as needed. The surface of the iron cap and steel foot is completely coated with hot zinc. The push-pull elastic locking pin of the ball type connection has two types: W-type and R-type, both made of tin bronze, brass, and austenitic stainless steel, with good elasticity and corrosion resistance, and easy disassembly and assembly. The cylindrical and hump shaped open mouth pins with groove connections, the former with surface heat zinc and the latter made of brass. The above-mentioned elastic locking pins, cylindrical pins and other zero insulators are divided into two types according to the connection method: ball type and groove type.
Ordinary and pollution resistant insulators of the same strength level can be interchanged by using the same ball and socket connection size.
