JPH1051937A - Terminal connecting box for power cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability by hooking an end portion of particular fixing fittings of a predetermined length to first and second flanges and by setting the amount of compression of a spring. SOLUTION: A flange 1 is provided at a lower portion of an insulation cylinder coupled to the side of a bushing, and a second flange 12 is provided at a lower portion of a spring 6 at the side of a premold insulation body compression device. Fixing fittings 10 is used between the first and second flanges 11 and 12. The fixing fitting 10 is pressured with a spring 6 and fixed. That is, while the spring 6 is compressed and kept to a set point by using a compressor, the fixing fittings 10 is hooked to a groove 11a of a first flange 11 and a groove 12a of the flange 12 by using bent hooking edges 10a and 10b, and the premold insulation body compression device is fixed to the inside of the main body of the connecting box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology of a terminal junction box for a power cable, and more particularly to a terminal junction box for a crosslinked polyethylene insulated power cable.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional terminal junction box for a power cable, wherein 1 is a porcelain tube, 2 is a pre-molded insulator,
Reference numeral 3 denotes a conductor lead rod, 4 denotes a power cable, 5 denotes an insulating cylinder, 6 denotes a spring, 7 denotes a shaft, 8 denotes a pre-molded insulator compression device, 9 denotes a nut, and 13 denotes a cable protection fitting.

[0003] The pre-molded insulator compression device 8 is fixed to the terminal junction box main body with a shaft 7 and tightens a nut 9 screwed into the shaft 7 to compress the spring 6 to a set value. Mold insulator 2 and insulator tube 1
And a predetermined compression force.

[0004]

[Problems to be solved by the invention]

According to the prior art described above; FIG. 3 shows that the setting of the spring compression amount of the pre-molded insulator compression device 8 is performed by screwing in a nut, so that the operation becomes minute and the assembly takes time. was there.

Therefore, the problems to be solved by the present invention (objects)
It is an object of the present invention to provide a power cable terminal connection box that can improve workability when setting the amount of spring compression of a premold insulator compression device.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a terminal box for a power cable, comprising: a pre-mold insulator to be inserted into a power cable inserted into a porcelain tube; In the terminal connection box having a structure of being pushed into the insulator tube by compression, a first flange is provided on the insulator tube side, and a second flange is provided on an end portion of the spring, and these first flange and second flange are provided. The amount of compression of the spring is set by hooking the end of the fixing bracket specified to a predetermined length.

A groove is preferably provided in each of the first flange and the second flange, and a bent edge provided at an end of the fixing bracket is preferably hooked in the groove of both flanges.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a terminal connection box for a power cable according to the present invention, and FIG. 2 shows a main part of the terminal connection box. In the figure, 1 is a porcelain tube, 2 is a pre-molded insulator, 3 is a conductor extraction rod, 4 is a power cable, 5 is an insulating cylinder,
6 springs, 8 'is a pre-mold insulator compression device, 1
Reference numeral 0 denotes a fixing bracket, 11 denotes a first flange, 12 denotes a second flange, and 13 denotes a cable protection bracket.

Thus, the first flange 11 is provided on the insulator tube 1.
The second flange 12 is provided below the spring 6 on the side of the pre-mold insulator compression device 8 '. A fixture 10 is used as a link between the first flange 11 and the second flange 12. This fixing bracket 10
Has a length capable of compressing the spring 6 with a predetermined compression amount and allowing the pre-molded insulator compression device 8 ′ to be elastically fixed at a set value in the junction box body (the insulator tube 1). The bending edges 10a and 10b are formed at both ends. The grooves 11a, 1 are formed in the first flange and the second flange corresponding to the bent edges 10a, 10b.
2a is provided.

At the time of construction, the spring 6 attached to the pre-mold insulator compression device 8 'is compressed to a set value using a compressor, and the compressed state is maintained.
Fixing the fixing bracket 10 to the upper and lower bent hooking edges 10a, 10b
The groove 11a of the first flange and the groove 1 of the second flange
By hooking on 2a, the pre-molded insulator compression device 8 'is fixed in the connection box main body with a predetermined compression force.

[0011]

According to the present invention as described above, a spring attached to a pre-molded insulator compression device is compressed to a predetermined compression amount by a compressor so that the spring length can be fixed at a set value. The pre-molded insulator compression device can be fixed in the junction box body by using a fixing bracket specified to have a predetermined length. The predetermined operation can be completed only by hooking on the body compression device, that is, the second flange fixed on the spring side, and the workability when setting the pre-molded insulator compression device can be greatly improved. Therefore, it is possible to achieve an intended task (object) of providing a power cable terminal connection box that can improve workability when setting the spring compression amount of the premold insulator compression device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a power cable termination junction box according to the present invention.

FIG. 2 is a sectional view of a main part of the terminal connection box shown in FIG. 1;

FIG. 3 is a longitudinal sectional view showing a structural example of a conventional power cable termination junction box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulator tube 2 Pre-mold insulator 3 Conductor lead-out rod 4 Power cable 5 Insulation cylinder 6 Spring 8 'Pre-mold insulator compression device 10 Fixture 10a First bending edge 10b Second bending edge 11 First Flange (porcelain tube; insulating cylinder side) 11a groove 12 Second flange (spring side) 12a groove 13 Cable protection bracket

Claims (2)

[Claims] An end connection box having a structure in which a pre-molded insulator inserted onto a power cable inserted into an insulator tube is pushed into the insulator tube by a spring compression of a pre-mold insulator compression device, and the end tube is connected to the insulator tube side. And a second flange is provided on the end side of the spring, and the first and second flanges are hooked with the ends of the fixing bracket specified to a predetermined length. A terminal connection box for a power cable, in which the amount of compression of the spring is set. 2. A groove is provided in each of the first flange and the second flange, and a bend engaging edge provided at an end of a fixing bracket is hooked on the groove of both flanges. 2. The terminal connection box for a power cable according to 1.