1. The connection of the conductors of the conductor requires low resistance and satisfactory mechanical strength, and the joint cannot be pointed. The medium and low voltage cable conductors are commonly used for crimping. Crimp should be noted:
(1) Selecting conductors with appropriate conductivity and mechanical strength to receive;
(2) The inner diameter of the pressure receiving inner diameter and the outer diameter of the wire core to be connected are 0.8 to 1.4 mm;
(3) The resistance value of the joint after crimping should not be greater than 1.2 times that of the conductor of equal section, and the tensile strength of the copper conductor joint is not less than 60N/mm2;
(4) Before the crimping, the outer and outer surfaces of the conductor and the inner and outer surfaces of the conductor are coated with a conductive adhesive, and the oxide film is broken by a wire brush;
(5) The receiving, the sharp corners on the core conductor, the burrs, etc., are lubricated with a trowel or sandpaper.
2. Internal semiconductor shielding treatment.
Where the cable body has an inner shielding layer, it is necessary to reinforce the inner shielding layer of the receiving portion of the conductor when manufacturing the joint, and a part of the inner semiconductor shield of the cable is required to allow the inner shield of the connector to be connected to each other. The continuity of the inner semiconductor is ensured, so that the field strength at the joint receiving portion is evenly distributed.
3. Processing of external semiconductor shielding.
The outer semiconductor shield is a semi-conductive material that has a uniform electric field effect on the outside of the cable and cable joint insulation. It is the same as the inner semiconductor shield and plays an important role in the cable and the joint. It is necessary for the outer semiconductor port to be evenly arranged and also required to have a smooth transition with the insulation, and the semiconductor strip of the cable joint is connected to the external semiconductor shield of the cable.
4, the cable response cone processing.
During the construction, the shape and the correct and reliable counter-cone force cone are balanced on the whole cone surface. When manufacturing the cross-linked cable reflex cone, the special cutting tool is generally used, or it can be heated slightly with a slight fire. After cutting, after basic molding, scrape with 2mm thick glass, and then sand the paper from coarse to fine until the lubrication is reached.
5. Metal shielding and grounding treatment.
The effect of the metal shield in the cable and the joint is mainly used to transmit the short-circuit current of the cable, and the electromagnetic interference of the shielded electromagnetic field to the communication device. In the running state, the metal shield is at zero potential in the outstanding grounding state, after the cable is in trouble It has the ability to conduct short-circuit currents in a very short time. The grounding wire should be firmly welded. The metal shielding and armoring tape on the body of the two-headed cable should be firmly welded, and the grounding of the terminal should be firm.
6. Sealing and mechanical maintenance of the joint.
The sealing and mechanical maintenance of the joint is a guarantee for the safe and secure operation of the joint. The moisture and moisture in the cable joint should be avoided. In addition, the joint maintenance slot or the cement maintenance box should be installed in the joint orientation.