Manufacturing process of connecting fittings for improving wire clamping strength

Classification：Industry trends
author：Dapeng power
release time：2022-01-12
Views：214

Manufacturing process of connecting fittings for improving wire clamping strength

【概要描述】

Traditional fittings are mainly composed of reinforced shell, puncture blade, waterproof silicone grease, high-strength bolts and nuts. Torque nuts are preferred for nuts, with mature structure and wide application. However, traditional fittings also have shortcomings. The pressure of wire clamp depends on the pressure of ordinary bolt components, which has poor firmness and is easy to loosen.

The process of power connection fittings with high wire clamping strength includes a base tube, a core tube, a crimping part and a set of claw assembly; The inner peripheral wall of the base tube is provided with a plurality of wire clamping bosses; The core tube is located in the lumen of the base tube; The tube wall of the core tube is provided with a group of guide holes, which include a plurality of radial limit sliding holes; The inner wall of the core tube is provided with an internal thread area; The claw assembly includes a plurality of claws; Each pressing claw comprises a pressing plate part, a guide slider part protruding from the pressing plate part and a driving surface arranged on the guide slider part; Each guide slider part is inserted into a corresponding radial limit sliding hole on the core tube, each driving surface extends into the tube cavity of the core tube, and each pressing plate part is located between the inner wall of the base tube and the outer wall of the core tube; The pressing plate part of each pressing claw is clamped with a corresponding wire clamping boss to form a wire clamping hole for clamping the power cable; The crimping part comprises a body, an external thread area arranged on the outer peripheral wall of the body and a crimping boss arranged on the inner end of the cylindrical body, and the external thread area of the crimping part is adapted to the internal thread area of the core tube; The driving surface of each pressing claw is adapted to the peripheral wall of the crimping boss; The base tube is provided with a mounting screw hole with a built-in temperature sensing device; The temperature sensing device comprises a metal shell with a holding groove made of metal material, a temperature sensor arranged in the holding groove, a spring for crimping the temperature sensor on the bottom wall of the holding groove, and a screw plug for a limit spring; One end of the metal shell close to the middle axis of the base tube is provided with a heat conduction boss for puncture; One end of the metal shell away from the middle axis of the base tube is provided with an inner hexagonal screw groove; The outer peripheral wall of the metal shell is provided with an external thread adapted to the mounting screw hole, and the inner peripheral wall of the holding groove is provided with an internal thread area; The temperature sensor comprises a heat conducting block made of heat conducting insulating rubber material, a U-shaped thermistor arranged in the heat conducting block, and two electric plug posts arranged on the heat conducting block; The heat conducting block can slide back and forth in the holding groove of the metal shell; One end of the heat conduction block close to the middle axis of the base tube butts against the bottom wall of the holding groove; Two electric plug-in columns are protruded and arranged on the other end of the heat conduction block away from the middle axis of the base tube; An annular groove is formed between the outer diameter of the other end of the heat transfer block away from the middle axis of the base tube and the inner peripheral wall of the holding groove, and the spring is located in the annular groove and sleeved on one end of the heat transfer block away from the middle axis of the base tube; The outer peripheral wall of one end of the screw pipe plug close to the middle axis of the base pipe is provided with an external thread area, which is adapted to the internal thread area of the metal shell; The outer peripheral wall of one end of the screw pipe plug away from the middle axis of the base pipe is provided with an outer hexagonal screwing part; A pipe cavity is arranged in the middle of the screw pipe plug; The screw pipe plug is fixedly arranged in the annular groove through its external thread area; One end of the spring close to the middle axis of the base tube is butted on the heat conduction block, and the other end of the spring away from the middle axis of the base tube is butted on the screw tube plug; The two electric plug studs on the heat conduction block are located in the lumen of the screw plug. The heat conduction boss is a sharp toothed boss protruding from one end of the metal shell close to the middle axis of the base pipe, and the installation screw hole passes through the line clamping boss along the base pipe diameter. Effect of art invention:

1. The crimping part is connected with the core pipe in a threaded way, and each pressing claw is crimped through the conical crimping surface to clamp the power cable, which is labor-saving and has a good anti loosening effect;

2. Since the base pipe is provided with a mounting screw hole, a temperature sensing device is fixed in the mounting screw hole; Therefore, it also has the function of real-time temperature monitoring to improve the intelligence of power grid.