Cable connector using insulation-piercing mode to connect cables

Abstract

The invention provides a cable connector using an insulation-piercing mode to connect cables, the connector body is manufactured by using aluminum casting alloy and is externally coated with an insulating layer, the connector body comprises a main connecting body, a clamping body is connected on the main connecting body by connecting bolts, clamped innerarc surfaces are arranged at the positions where the main connecting body and the clamping body are contacted with cables and are intensively provided with clamped prickling pins which are casted and shaped at the same time with the main connecting body and the clamping body, the main connecting body is provided with a threaded mounting hole, the clamping body is provided with a fan-shaped connecting hole, the outer side of the clamping body is arranged in an arch shape, and the connecting pressure of the connector is undertaken by the aluminum alloy body. The invention has the advantages that the clamped prickling pins are sued to pierce the cable insulating layer and be communicated with a conductor on the premise of not stripping off the cable insulating layer, so that cables can be connected rapidly and effectively. The invention has the advantages of strong anti-overloading capacity, good copper-aluminum transition performance and favorable reducing joint performance.

Description

Technical field: [0001] The invention belongs to the field of electric power wiring fittings, and is a connecting fitting for outdoor overhead cables or indoor power wiring. Background technique: [0002] The current electric power overhead lines mostly use cables or wires with insulating protective layers, and indoor wiring also uses cables with insulating skins. The traditional method of installing branch cables needs to strip off the insulating skins and use parallel groove clamps to crimp the contacts. Oxidation causes the contact resistance to gradually increase, the temperature rise continues to increase, and irregular maintenance is required. In the 1970s, foreign countries took the lead in adopting the technology of piercing insulation connection cables. And it is maintenance-free. The product made by this technology - insulation piercing clamp has been in China for nearly 15 years. It has been widely used in low-voltage overhead lines. After a period of operation pr...

AI Technical Summary

Problems solved by technology

[0002] The current electric power overhead lines mostly use cables or wires with insulating protective layers, and indoor wiring also uses cables with insulating skins. The traditional method of installing branch cables needs to strip off the insulating skins and use parallel groove clamps to crimp the contacts. Oxidation causes the contact resistance to gradually increase, the temperature rise continues to increase, and irregular maintenance is required. In the 1970s, foreign countries took the lead in adopting the technology of piercing insulation connection cables. And it is maintenance-free. The product made by this technology - insulation piercing clamp has entered China for nearly 15 years. It has been widely used in low-voltage overhead lines. After a period of operation practice, the product structure and control principle are similar to Defects in materials are gradually exposed and cause certain accidents, which affect the popularization of

[0003] 1. Poor overload resistance

[0004] The insulation puncture clamp adopts the structure of the metal puncture blade inlaid in the plastic shell. Although the corresponding insulation level is obtained, the large connection pressure is partially transmitted to the puncture blade through the plastic shell, which puts high requirements on the strength of the shell material. When there is When the high temperature rise (overload) of the wire is transmitted to the shell through the piercing blade, the shell will be thermally deformed under the action of the connection pressure, resulting in a decrease in the connection pressure, an increase in the contact resistance and melting, and a low melting point of the shell material (180 ℃) is the main reason

[0005] Second, the connection pressure dispersion is too large

[0006] The insulation piercing clamp adopts the control principle of constant force provided by the torque nut, the purpose is to ensure a reliable contact pressure during installation, and at the same time, it does not pierce too deeply and damage the conductor strength. The cable insulation layer is affected by temperature, and the hardness changes greatly. When installing at a lower temperature, the connection pressure obtained by twisting off the torque nut is far from enough, resulting in a virtual connection and the construction personnel cannot intuitively find it. If the torque is increased, the installation at a higher temperature will damage the strength of the conductor. This product The contradiction between the constant contact pressure provided and the non-constant hardness of the wire insulation makes the torque nut solution not suitable for every sample

[0007] 3. Poor environmental resistance

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