Installation tool for cable insulation cable cleat

Abstract

The invention discloses an installation tool for a cable insulation cable cleat. The installation tool comprises a fixed clamp block, a movable clamp block matched with the fixed clamp block to squeeze the cable insulation cable cleat, and a self-regulating speed screw mechanism; the self-regulating speed screw mechanism comprises a draw bar, a middle screw sleeve, an outer screw sleeve, wherein the front end of the draw bar is connected to the movable clamp block, the rear end of the draw bar is connected to a crank, the middle screw sleeve and the draw bar constitute a low speed screw mechanism, and the middle screw sleeve and the outer screw sleeve constitute a high speed screw mechanism; in the early stage of installation, no load is on the front side of the movable clamping block, a rotating crank automatically triggers the high speed screw mechanism, the draw bar can drive the movable clamping block to quickly move forward, and the installation efficiency is improved; in the later stage of installation, a load is on the front side of the movable clamping block, a rotating crank automatically triggers the high speed screw mechanism, the draw bar can provide sufficient thrust for the movable clamping block to ensure the installation quality; when the installation tool for cable insulation cable cleat is in use, the high efficiency and the high quality are ensured.

Description

[0001] The present invention is a divisional application of the invention patent application with application number 201610528806.7 submitted on July 06, 2016. technical field [0002] The invention relates to the field of cable accessories, in particular to a special installation tool for cable insulation piercing clamps. Background technique [0003] 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...

AI Technical Summary

Problems solved by technology

[0005] (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.

[0006] (2) During 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, which will make the joint Looseness, that is, the contact between the piercing blade and the metal conductor is poor, and 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 make the contact part The temperature is too high, which further shortens the working life of the cable insulation piercing clamp

[0007] (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, and the damage is serious. The piercing blades are distributed on the outside of the cable in a ring shape, and the number of piercing blades is limited, so that the contact section between the cable insulation piercing clamp and the metal conductor is small, and the current carrying capacity is small

[0008] (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

[0009] 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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