JPH0514682Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a molded insertion type cable connection part for connecting the middle part or the terminal part of a power cable.

[Prior Art] Conventionally, the connection part of a cable is, for example, a third
As shown in the figure, conductors 4a and 4b of cables 3a and 3b are connected to both ends of the conductor connector 1 via conductor connection terminals 2a and 2b, and this conductor connection portion is buried in the center of the reinforcing insulator 5. ing. Further, a cylindrical high-voltage shield electrode 6 having a ring-shaped internal flange in contact with the outer periphery of the conductor connector 1 is embedded in the reinforcing insulator 5, and an edge cutout 7a is provided on the outer periphery of the reinforcing insulator 5. An external semiconducting layer 7 having a diameter of 1.5 mm is provided around the periphery, and an anti-corrosion protection layer (not shown) is further provided around the outer periphery.

[Problems to be solved by the invention] However, in the configuration of the cable connection part as described above, the high voltage shield electrode 6 is connected to the conductors 4a and 4b.
Since the reinforcing insulator 5 is located on the outer periphery of the reinforcing insulator 5, there is a drawback that the outer diameter of the reinforcing insulator 5 must be increased in order to obtain perfect insulation. In the case of a cable insulated connection part, it is necessary to provide an edge cut part 7a on the external semiconductive layer 7, so the outer diameter of the reinforcing insulator 5 becomes even larger, and the shape of the normal connection part and the insulated connection part becomes larger. It is necessary to use different reinforcing insulators, which poses problems in terms of work efficiency and cost.

[Object of the invention] An object of the invention is to eliminate the drawbacks of the above-mentioned conventional example and to provide a cable connection part that is compact and provides a good connection condition.

[Summary of the invention] The gist of the invention to achieve the above objectives is as follows:
The cable conductors are connected to each other by a conductor connector, the connecting portion is surrounded by a hollow drum-shaped high-voltage shield electrode, and the connecting portion and the high-voltage shield electrode are buried in a reinforcing insulator having a semiconductive layer on the outer periphery. . A cable connecting portion, wherein the edge cut portion of the semiconductive layer is located in an outer concave portion of the high voltage shield electrode.

[Embodiment of the invention] The invention will be explained in detail based on the embodiment shown in FIGS. 1 and 2.

FIG. 1 shows a cross-sectional view of the upper half of the cable connection part according to the present invention, in which conductor connection terminals 12a and 12b are connected to both left and right ends of the conductor connector 10 via conductor contacts 11a and 11b. The other ends of conductor connection terminals 12a and 12b are connected to conductors 14a and 1 exposed from cables 13a and 13b, respectively.
It is attached to 4b. Further, a metal high-voltage shield electrode 15 is attached around the protrusion of the conductor connector 10, which is approximately drum-shaped with a narrow diameter in the center.
The conductor connection portion is surrounded by a reinforcing insulator 16, and the entire structure including the high-voltage shield electrode 15 is embedded in a reinforcing insulator 16. An outer semiconducting layer 17 and an anti-corrosion protection layer 18 are sequentially formed on the outer periphery of the reinforcing insulator 16, and the edge portion 17a of the outer semiconducting layer 17 is buried in the reinforcing insulator 16 in a concave shape. ing.

The position of the edge cutting portion 17a is the same as that of the reinforcing insulator 1 in FIG.
Between the broken lines P and Q of 6, that is, the high voltage shield electrode 1
It is sufficient to bury it near the outer periphery of the concave part 5, but if we take into consideration the concentration of the electric field, it should be buried near the midpoint between the broken lines P and Q, as is clear from the equipotential line V shown in Figure 2. It is preferable to provide one.

If the high-voltage shield electrode 15 is formed into a substantially drum shape in this way, and the edge cutting portion 17a is embedded in the reinforcing insulator 16 near the outer peripheral portion on the radial extension of the recess, the reinforcing insulator 16 Even if the outer diameter of the edge cutter 17a and the high voltage shield electrode 1
5 can be spaced widely.

Therefore, as shown in FIG. 2, the electric field generated by the high-voltage shield electrode 15 and the like is unlikely to be disturbed by the edge cutting portion 17a, and it is possible to downsize the cable connection portion without impairing the insulation condition. can.

[Effects of the invention] As explained above, in the cable connection part according to the invention, the high-voltage shield electrode is formed into a substantially drum shape, and the edge portion of the outer semiconducting layer is embedded in the reinforcing insulator. The outer diameter of the body is smaller, making it possible to downsize the cable connection, and also allowing the use of reinforcing insulators of the same shape in the normal connection and insulated connection, resulting in improvements in terms of work and cost. We can also expect an improvement in

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the cable connection part according to the present invention, where Figure 1 is a sectional view, Figure 2 is an electric field distribution diagram, and Figure 3 is a sectional view of a conventional example. . 10 is a conductor connection terminal, 11a and 11b are conductor contacts, 12a and 12b are conductor connection terminals, 13
a and 13b are cables, 14a and 14b are conductors,
15 is a high voltage shield electrode, 16 is a reinforcing insulator, 1
7 is an outer semiconducting layer, and 17a is an edge portion.

Claims (1)

[Scope of utility model registration request] Connect cable conductors to each other using a conductor connector,
The connecting portion is surrounded by a hollow drum-shaped high-voltage shield electrode, the connecting portion and the high-voltage shield electrode are embedded in a reinforcing insulator provided with a semiconductive layer on the outer periphery, and the edge portion of the semiconductive layer is surrounded by the A cable connection part characterized in that it is located in an outer concave portion of a high voltage shield electrode.