From the cast iron clamps in the 19th century to the ship-shaped clamps in the 20th century, the evolution of power fittings stagnated for half a century. It was not until the emergence of preformed suspension clamps that the original way of hanging wires truly entered a new era.
Compared with other traditional forms of fittings, preformed fittings have better performance. preformed fittings have strong fatigue resistance; simple and fast installation, strong consistency; high efficiency and energy saving; wide adaptability and good corrosion resistance. There are great advantages in line construction, maintenance, energy consumption, etc., which can improve the transmission efficiency and benefits of the power grid.
Suspension clamps are common standardized products in power fittings. The old-fashioned ship-shaped suspension clamps and preformed suspension clamps are more commonly used in the market. The old-fashioned suspension clamps, which are clamp conductors, can withstand the installation load of the conductors in the vertical span, and do not allow the clamps to slide or detach from the insulator string when the line is operating normally or disconnected. The tower using this clamp has a large bearing pressure. Preformed suspension clamps can be used for the connection of ADSS optical cables, OPGW optical cables, various conductors, etc. on straight pole towers. The combination of inner and outer spiral preformed wires can well protect the optical cables, without concentrated stress.Preformed suspension clamps can avoiding bending stress, and protecting and assisting in vibration reduction of the optical cables.
The old-style ship-type suspension clamps will cause a large load-bearing pressure on the pole tower when used. Under the action of wind force, the hull and the bracket of the suspension clamp will cause relative movement, resulting in wear of the hanging shaft. After long-term wear, the hanging shaft will cause a drop accident, and the fixing firmness is not good. Compared with the old-style ship-type suspension clamps, the helical suspension clamp for conductor can withstand a small vertical destructive load, so they are more widely used. The helical suspension clamp for conductor can not only effectively protect the conductors, but also their smooth outer contour reduces corona discharge, especially suitable for ultra-high voltage lines. The double-pivot helical suspension clamp for conductor can also be used for long-distance transmission lines across rivers and pole towers with large corners.
Vilun Electric leads innovation in technology research and development, with 4 invention patents and more than 50 utility model and software copyright patents. The company has passed many domestic and international quality system certifications and won many national and provincial honors. In the production plant, Vilun Electric always adheres to high standards and high investment, and uses world-class production equipment to ensure product quality. Each helical suspension clamp for conductor is tested and inspected to strive for perfection.
