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Type and Function of Clamps
- Aug 01, 2018 -

(1) The tension clamp is used for turning, connecting and terminal connection. The spiral aluminum clad steel wire has strong tensile strength and no concentrated stress, which plays an important role in protecting and assisting the optical fiber cable. The tension clamp is used to fix the conductor or lightning conductor to the tension insulator string of the non-linear tower, which acts as anchor, and is also used to fix the cable of the cable tower.

According to the structure and installation conditions, the tension clamp can be broadly divided into two categories. The first type: the tensioning clamp should bear all the tension of the wire or the lightning conductor. The grip strength of the clamp is not less than 90% of the rated resistance of the wire or the lightning arrester, but it does not act as a conductor. This kind of wire clamp can also be removed after the wire is installed and used separately. This kind of clamp has bolt type tensile clamp and wedge type tension clamp. The second category: tensile clamp not only takes all pulling force of conductor or lightning conductor, but also acts as conductor. Therefore, once these clamps are installed, they can no longer be disassembled, also known as dead wire clips. As the conductor is used, the installation of the clamp must be carried out in accordance with the provisions of the relevant installation procedures.

(2) The draping clamp is a common type of product, retaining a U type bolt pattern fixed suspension one (usually called the ship type wire clip). It is made up of a hanger U type bolt and the hull. The other is the pre twisted suspension clamp, which is widely used in China.

Old type boat clamp: this kind of wire clamp conductor and lightning conductor can be used. It can withstand the installation load of the wire in the vertical distance, and does not allow the thread clip to slide or out of insulator string when the line is normal or broken line. The bearing pressure of the tower is large.

The function and use of the pre hanging pendant wire clip: for ADSS optical cable, OPGW cable, all kinds of wires and so on in the line tower, the combination of inner and outer spiral pre twisted wire can protect the optical cable very well, have no concentrated stress, avoid the bending stress, protect the cable and assist the vibration reduction. The whole set of suspension wire clamp includes inner and outer layer pre twisted wire, hanging head and matching fittings. The grip strength of the clamp is larger than that of the rated tensile strength of the optical cable 10%-20%, so it is easy to install.

(3) The puncture clamp has the characteristics of simple installation, low cost, safety and reliability, and maintenance free. Without the need to cut off the main cable, without the need to peel off the cable insulation layer can be used as a cable branch, the joint is completely insulated, can be charged work, can be in any position of the cable to be a field branch. There is no need to use a terminal box or a feeder box. The joint is resistant to distortion, shockproof, waterproof and corrosion resistant. Using insulation puncture wire clip to make cable branches, the comprehensive benefit is obvious, and the cost performance is better than the traditional connection method.

(4) Equipment wire clamp, mainly used for connection between the bus line and electrical equipment (such as transformer, circuit breaker, isolating opening, wall casing, etc.) of substation, because the output terminals of common electrical equipment are copper and aluminum two, and the bus line is divided into aluminum wire of each steel core with aluminum hinge line, so the equipment line clip from the material The quality is divided into two series: aluminum equipment line and copper aluminum transition equipment clamp.