A cable insulation piercing clip

Abstract

The invention discloses a cable insulation piercing clamp. The cable insulation piercing clamp comprises a clamp fixed assembly, a clamp movable assembly and a locking assembly, wherein the clamp fixed assembly includes an insulation main body equipped with a square groove; two side walls of the square groove are equipped with cable grooves; a metal guide wire is pre-embedded in the insulation main body; two piercing tips of the metal guide wire extend to the inside of the two cable grooves; the clamp movable assembly includes two line-pressing blocks which are placed in the square groove; an outer side of each of the two line-pressing blocks is provided with a line-pressing groove which is parallel with and symmetrical to a corresponding cable groove; the locking assembly consists of a locking rod, a thread sleeve and a buffer sleeve; the locking assembly can adjust a distance between the two line-pressing blocks so that a main cable and a branch cable are respectively compacted in the two cable grooves of the clamp fixed assembly; and each metal guide wire pierces an insulation layer by virtue of the piercing tips on two ends of the metal guide wire to conduct the main cable and the branch cable. The cable insulation piercing clamp is good in sealing property and shock resistance, excellent in conduction effect, stable to work, simple in structure, easy to operate and long in service life, and overcomes many defects existing in a former insulation piercing clamp.

Description

technical field [0001] The invention relates to a cable connection accessory, in particular to an insulation piercing clamp for cable branch connection. Background technique [0002] The cable insulation puncture clamp is a cable branch connection device introduced and developed in recent years. It is mainly composed of an insulating shell, a puncture blade, a waterproof rubber pad, and a torque bolt. When making a cable branch connection, the branch cable is inserted into the branch line. After confirming the position of the branch of the main line, use a socket wrench to tighten the torque nut on the clamp. With the tightening of the torque nut, the two insulators with piercing blades hidden on the top and bottom of the clamp gradually close together, and the piercing blade penetrates the cable insulation layer and In contact with the metal conductor, at the same time, the arc-shaped sealing rubber pad wrapped around the piercing blade is gradually clinging to the cable in...

AI Technical Summary

Problems solved by technology

[0004] (1) The clamping force of the entire cable insulation piercing clamp to the main cable and the branch cable is provided and maintained by a bolt. In order to achieve the best results of the aforementioned two technical requirements at the same time, it is necessary to rely on excellent structural design and precision. The size control of the existing cable insulation piercing clamp is difficult, the process requirements are very high, and the price is expensive. This balanced state is difficult to achieve and is not conducive to maintenance.

[0005] (2) In the process of use, the cable insulation piercing clamp and the cable will inevitably experience different degrees of thermal expansion and contraction under the action of temperature difference, and there is no stress compensation mechanism between the cable insulation piercing clamp and the cable, and the piercing blade will be damaged over time. Poor contact with the metal conductor, the insulation layer and the sealing rubber pad are not tightly matched, so that the cable insulation piercing clamp cannot work stably for a long time; at the same time, the increase in the contact resistance between the piercing blade and the metal conductor will cause the temperature of the contact part to be too high, further Reduced working life of cable insulation piercing clamps

[0006] (3) When the existing cable insulation piercing clamp is installed, a group of piercing blades will pierce around the same section of the cable; on the one hand, the metal conductor in the cable is seriously damaged at the piercing section, which reduces the current carrying capacity of the cable , on the other hand, the insulation layer of the cable is cut in multiple places in the same section, the damage is serious, the sealing is difficult to remedy, and the tensile capacity of the cable insulation layer is reduced at the same time; On the outside of the cable, the number of piercing blades is limited, so that the contact section between the insulation piercing clamp and the metal conductor is small, and the current carrying capacity is small

[0007] (4) The contact between the piercing blade and the metal conductor of the cable is a rigid contact. When disturbed by an external force, the two will undergo permanent deformation, which will affect the contact effect. stable job

[0008] To sum up, the existing cable insulation piercing wire clamps are difficult to manufacture, high in process requirements, expensive in use, and the electrical contact effect between the piercing blade and the metal body and the gap between the sealing rubber pad and the insulating layer It is difficult to balance the tightness and other deficiencies, so that it cannot achieve long-term stable work

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