JPS59141367A - Brazing method of cable conductor - Google Patents

Abstract

PURPOSE:To prevent thermal deterioration of an insulator by winding a metallic tape into multiple layers on the exposed part of the conductor near the insulator and radiating heat. CONSTITUTION:An insulator 2 at the end of a cable to be connected is stripped away to expose the conductor 1. The exposed conductors are butted to each other. A metallic tape 5 is wound in multiple layers on the outside circumference of the conductor 1 near the insulator 2 and further the butt parts of the conductors 1 are welded and connected by silver solder 3. The metallic tape layers 5 in this case act as a heat radiating plate, so that the high temp. during welding is not transmitted to the insulator 2 and the thermal deterioration of the insulator 2 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for connecting conductors of a power cable by soldering, and particularly to a simple cooling method.

Conventionally, when connecting cable conductors by soldering, as shown in Fig. 1, the insulator 2 at the end of the cable to be connected is stripped off, the exposed conductors 1 are butted together, and a soldering alloy 3 (for example, silver solder) is used to connect the cable conductors. The connection was welded.

However, in this case, there was a risk that the insulator would deteriorate due to the high temperature of the welded part.

One possible way to prevent thermal deterioration of the insulator is to lengthen the exposed conductor portion, but this has the disadvantage that the entire cable connection portion becomes larger and the working time becomes longer.

As a method to prevent thermal deterioration of the insulator, a cooling pipe 4 having a hollow interior is provided around the outer circumference of the conductor 1, as shown in Fig. 2.
A method of cooling by flowing water into the cooling pipe has also been proposed. However, with this method, the cooling effect is limited, and since the cooling pipe is installed in close contact with the conductor, it is necessary to manufacture a cooling pipe for each conductor size, and it takes time to install and remove the cooling pipe. There was a drawback that water droplets formed on the surface of the cooling pipe, which adversely affected the conductor.

The purpose of unexploded ψJ is to eliminate the drawbacks of the prior art described above,
An object of the present invention is to provide a novel cable conductor brazing method that can prevent thermal deterioration of an insulator by attaching a simple cooler.

In other words, the gist of the present invention is that when the insulation at the end of a cable to be connected is stripped off and the exposed conductors are butted together for soldering, multiple layers of metal tape are wrapped around the exposed conductor near the insulation to dissipate heat. A method of soldering cable conductors is provided.

FIG. 3 shows an example of the method of the present invention.
The insulator 2 at the end of the cable to be connected is peeled off, the conductor 1 is exposed, and the cables are butted against each other.

Next, multiple layers of metal tape 5 (for example, copper tape with a thickness of 0.1 mm) are wrapped around the outer periphery of the conductor 1 near the insulator 2. Furthermore, the abutting portions of the conductors 1 are welded and connected using silver solder 3.

In this case, the metal tape layer 5 acts as a heat sink, and the high temperature during welding is not transmitted to the insulator 2, thereby preventing thermal deterioration of the insulator 2.

FIG. 4 shows another embodiment of the method of the present invention, in which a metal tape layer 5 serving as a heat sink is tapered.

In this case, since the opening of the connection part becomes wider, there is an advantage that the soldering work becomes easier.

6 indicates the spraying of cooling gas, which further improves the cooling effect.

In this case, the metal tape layer 5 acts as a shield, and the cooling gas does not affect the welding flame, which is more effective in preventing thermal deterioration of the insulator 2.

As explained above, the present invention prevents thermal deterioration of the insulator by simply installing a cooler by wrapping the entire island with tape, and the work of wrapping and peeling off the metal tape is extremely easy, making it an excellent cable conductor. It provided a method for soldering, and its industrial value is of great value.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams showing an example of a conventional cable conductor soldering method, and FIGS. 3 and 4 are explanatory diagrams showing an embodiment of the couple conductor soldering method of the present invention. 1. Conductor, 2. Insulator, 3. Brazed joint, 4. Water cooling pipe, 5. Metal tape wrapping layer (heat sink), 6. Cooling gas blower.

Claims (1)

[Claims] A cable conductor characterized in that when the insulation at the end of the cable to be connected is peeled off and the exposed conductors are butted together and brazed, multiple layers of metal tape are wrapped around the exposed part of the conductor near the insulator to dissipate heat. Brazing method.