JPH0134513Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of a test connection for rubber/plastic cables.

Prior Art and Problems When testing rubber/plastic cables for withstanding voltage, the ends of the cables must be insulated and reinforced, and the cables may also have to be connected in the middle.

In the withstand voltage test, there is no need to consider the load current, and therefore the terminal processing and connection processing described above are considerably simplified. However, the cable terminal itself requires work to lead out the conductor, which still requires a considerable amount of man-hours.

Purpose of the invention The purpose of the invention is to provide a cable testing connection part that can omit the conductor exit from the cable terminal itself and reduce the number of work steps.

Structure of the invention The cable test connection part according to the invention is provided with a protrusion that protrudes inward on the shield electrode at the center of the inside of a rubber insulation reinforcing cylinder having a cable insertion hole, and the cut end of the cable is inserted into the cable insertion hole. This structure is characterized in that the cut end surface of the conductor at the cut end of the cable is brought into contact with the protrusion of the shield electrode.

Description of examples The present invention will be explained below with reference to the drawings.

FIG. 1 shows a rubber insulation reinforcing tube A used in the present invention.

In FIG. 1, reference numeral 1 denotes a rubber insulator, which is provided with cable insertion holes 21 and 22. 3 is a shield electrode provided at the center inside the rubber insulator, and is provided with a protrusion 31 that can protrude inward. Semiconductive rubber can be used for this shield electrode.
41, 41 are stress cones, and 42 is an outer semiconductive layer, and semiconductive rubber can also be used for these 41, 41, and 42. 5 is a metal shielding layer, and 6 is an insulating coating layer.

FIG. 2 shows the intermediate connection part for testing of the rubber-plastic cable according to the present invention, in which the cut ends E and E of the cable are inserted into the cable insertion holes 21 and 22 of the insulation reinforcing tube A, and the shield electrode 3 is inserted. Projection 3
An aluminum foil f is closely interposed between the cable 1 and the cut end surface e of the cable, and a spring-like conductor g is interposed between the aluminum foils f and f in a compressed state. At the cut end of the cable, the conductor is not exposed, only the cable sheath and outer shielding layer are stripped off, and the outer shielding layer e' is pressed against the stress cone 41. h is a pin for attaching the aluminum foil e to the conductor in advance. In this way, the conductor at the cable terminal is not exposed, and the conductor remains as a cut end surface that is flush with the end surface of the cable insulation layer, but since this conductor end is in electrical contact with the shield electrode of the insulation reinforcing tube, There is no concentration of electrical stress.

Fig. 3 shows a test end connection part of a rubber/plastic cable according to the present invention, in which the cut end E of the cable is inserted only into one side 21 of the cable insertion holes 21, 22 of the insulation reinforcing tube A, and the cable cut end E is inserted into the other side. An insulating rod I is inserted into the cable insertion hole 22. f is aluminum foil and h is a pin.

In this case as well, the conductor end can be electrically shielded by the shield electrode of the insulation reinforcing tube.

Effects of the invention The cable test connection part according to the invention has the configuration as described above, and even if the cable end is inserted with the vertical cut end surface without conducting what is called a conductor lead-out, the cable conductor end Can be electrically shielded. Of course, the electrical stress at the cable shielding end can be alleviated by the stress cone of the insulation reinforcing tube.

Therefore, according to the present invention, a withstand voltage test of a rubber/plastic cable can be carried out by simple terminal processing of the rubber/plastic cable (processing only by peeling off the cable sheath and outer shielding layer).

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a rubber insulation reinforcing cylinder used in the present invention, Fig. 2 is an explanatory diagram showing a cable test connection part according to the present invention, and Fig. 3 is an explanatory diagram showing another embodiment of the present invention. be. In the figure, A is an insulation reinforcing tube, 21 and 22 are cable insertion holes, 3 is a shield electrode, 31 is a protrusion,
E is a cable terminal.

Claims (1)

[Scope of utility model registration request] A protrusion that protrudes inward is provided on the shield electrode at the center of the rubber insulation reinforcing cylinder having a cable insertion hole, and the cut end of the cable is inserted into the cable insertion hole, and the conductor cut end surface of the cut cable end and the protrusion of the shield electrode are inserted. A connection part for cable testing, characterized in that the part is brought into contact with the part.