purpose

JThe Type series special-shaped parallel groove clamp is suitable for non load bearing splicing and branching of wires in overhead power lines, and is used in conjunction with insulation covers to provide protective insulation.

working principle

JThe design of the body is such that the direction of pressure on the wire is at a certain angle to the bolt. According to mechanical principles, the pressure on the wire is greater than the tensile force on the bolt, allowing the bolt to provide greater pressure on the wire, ensuring good contact between the wire and the clamp. When used together with the anti loosening nut, it ensures stable pressure on the wire and improves the stability of the line operation. By utilizing the long distance between the circular arc groove and the bolt support point, the elastic deformation of the body can overcome the loosening of the wire clamp bolt caused by thermal expansion and contraction of the wire. twoJThe contact points between the shape bodies and each otherJThe contact area between the body and the wire is coated with an antioxidant, which can effectively prevent twoJThe contact points between the shape bodies and each otherJThe contact between the body and the wire is oxidized or corroded, which improves the electrical contact performance.

performance advantage

Splicing fittings play a role in current connection and diversion in the power grid, and their connection methods with wires mainly include bolt type, wedge type, and hydraulic type. Traditional bolt type fittings are easy to install and detachable, but there is a possibility of accidents caused by loose bolts and require regular maintenance; During the on-site installation process, the clamping force of the locking bolt cannot be guaranteed, making it difficult to detect the installation quality. Excessive pressure can damage the wires, while insufficient pressure can cause high connection resistance and temperature rise, all of which can easily lead to accidents. Wedge pressed splicing fittings are generally made ofCComposed of a type shell and a trapezoidal inner wedge, it has the advantages of reliable connection, low resistance, and maintenance free; Wedge shaped parallel groove clamp(JXD)As a representative, the use of installation tools such as guns and bullets requires high demands on installation personnel. Currently, hydraulic installation tools are commonly used, and similar products with bolt fastening or products that are first tightened with hammers and then fixed with screws are also used. In addition, there are many specifications of wedge cores that match the wires, making product processing difficult. Moreover, there are many specifications of wedge cores, long production cycles, low production efficiency, and large-scale production requires a large amount of manpower. The degree of automation production is low, and the wide variety of product models brings selection difficulties to customers. In the past, the connection of copper wires could only be made with copper material connection fittings, such as copper parallel groove clamps and copperCWire clamps, etc. When aluminum connectors are used to connect copper wires, the contact surfaces of copper and aluminum can easily form an electrolyte due to the presence of gaps and the interaction with moisture, carbon dioxide, and other impurities in the air. This forms a battery with aluminum as the negative electrode and copper as the positive electrode, causing aluminum to undergo electrochemical corrosion and increasing the contact resistance at the copper aluminum connection, leading to heating and oxidation, which can easily cause accidents.