JPH0621123U - CV cable - Google Patents

Abstract

(57) [Summary] [Structure] In order to effectively use the existing pipeline, a compact CV cable with a reduced finished outer diameter has been proposed. The tension member 22 is inserted into the gap between the cable cores 14 (where the intervening members 16 and 18 were conventionally included) in the sheath 20. [Effect] Since the tensile strength is increased, it is possible to lay it on an inclined pipeline having a large height difference. It is possible to mount and lay on the vertical shaft. It is possible to install it on a long pipe (up by about 20%). By increasing the tensile strength, it becomes possible to mount on the utility pole as well as the overhead cable for distribution. Since it is inserted in place of conventional inclusions, the outer diameter of the cable does not change.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention mainly relates to a compact CV cable. However, it can be applied to other general CV cables.

[0002]

[Prior art]

 In order to effectively use the existing pipeline, a compact CV cable whose outer diameter is finished has been proposed. Fig. 3 shows a conventional compact CV cable (refer to the Proceedings of the 1st Annual Meeting of the Institute of Electrical Engineers of Japan, Power and Energy Section, 324). An insulator 12 is provided on the fan-shaped conductor 10, and a shield layer (not shown) of copper tape is provided on the insulator 12 to form a cable core 14. Three cores are twisted together, an interposition 16 is placed in the outer intertwisting gap, and an interposition 18 is placed in the central interstice to provide a common sheath 20.

[0003]

[Problems to be solved by the device]

 When attempting to lay it on a slope or vertical shaft with a large difference in height, or when trying to draw it into a straight long pipe line, tension is applied only to the conductor, making it impossible to lay it.

[0004]

[Means for Solving the Problems]

 As shown in FIG. 1, the tension member 22 is inserted in the gap between the cable cores 14 in the sheath 20.

The tension member 22 is put in place of the conventional interpositions 16 and 18 instead of them. The places to insert are as follows. As shown in FIG. 1 (a), it is inserted in the place where the conventional interposition 18 was present. As shown in FIG. 1 (b), it is inserted in the place where the conventional interposition 16 was present. As shown in FIG. 1 (c), it is inserted in the place where the conventional interposition 16 and interposition 18 existed. A steel wire, an FRP wire, or the like is used for the tension member.

[0006]

[Action]

 High tension is achieved by the tension member. For example,

[Equation 1] Therefore, by adding a tension member, it is possible to increase the length and tension by about 20%.

[0007]

[Other embodiments]

 (1) For a compact CV cable with multiple cores such as 6 cores and 9 cores, similarly, a tension member is inserted to increase the tension. (2) It can also be applied to a conventional 3-core CV cable as shown in FIG. In addition, 15 is a circular cable core, 24 is an interposition, and 22 is a tension member.

[0008]

[Function and effect of the device]

 (1) Since the tension can be increased, it is possible to lay it on an inclined pipe line with a large height difference. (2) It is possible to mount and lay it on a vertical shaft that has a large height difference. (3) It is possible to install it in a long pipeline (up by about 20%). (4) By increasing the tensile strength, it becomes possible to mount on the utility pole as well as the overhead cable for distribution. (5) In the case of a compact type CV cable, it is inserted in place of the conventional inclusion, so the outer diameter of the cable does not change.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention, (a) shows a case where a tension member is put only in the outer circumference, (b) shows a case where it is put only in the center, and (c) shows it put in both the outer circumference and the center. It shows the case.

FIG. 2 is an explanatory view of another embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional compact CV cable.

[Explanation of symbols]

 10 cable conductor 12 cable insulator 14,15 cable core 16,18,24 intervening 20 sheath 22 tension member

Claims (1)

[Scope of utility model registration request] 1. A CV cable in which a common sheath is provided around three or more cable cores, wherein a tension member is inserted in a gap between the cable cores in the sheath.