JPH0526897Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention, as shown by reference numeral 10 in FIG.
This invention relates to a high-voltage cable connection device that connects to an insulator used at a portion where a high-voltage pull-down cable 90 is branched from an overhead electric wire 80.

In addition, 82 in Fig. 4 is a transformer, 84 is a telephone pole, 86 is arm gold, 88 is an auxiliary metal fitting, shows.

[Conventional technology] An example is shown in FIGS. 5-7.

The high voltage cable connection device 10 includes a main body 12,
It consists of a cable connecting body 30 that is removably fitted thereto.

(1) About the main body 12: This part is not directly related to the present invention, so it will be explained very briefly.

14 is an insulator. The lower metal fitting 16 is attached to the hook 18.
Then, hook it onto the inclined tip of the auxiliary metal fitting 88 and secure it with a bolt.

An overhead electric wire 80 is held between the upper metal fitting 20 and the holding metal fitting 22 of the insulator 14.

24 is a conductor, the upper end of which is connected to the upper metal fitting 20. The conductor 24 penetrates inside the insulator 14 and connects it to the insulator 1.
4, and a socket 26 is formed at its lower end (FIG. 7).

An insulator 28 is provided around the conductor 24.

A portion of the insulator 28 also protrudes below the main body 12. 29 in FIG. 7 indicates the protruding portion.

(2) Regarding the cable connection body 30: In FIGS. 6 and 7, 92 is a cable conductor, and 94 is a cable insulator.

The terminal 32 is compressed and connected to the tip of the cable conductor 92, and the plug 34 is screwed into the terminal 32, for example, at a right angle.

An insulating tube 36 is provided around the tip of the cable 90, the terminal 32, and the plug 34. The insulating tube 36 includes an inner semiconducting layer 38, an insulating layer 40, and an outer semiconducting layer 42. Note that the outer semiconductive layer 42 is formed on the lower metal fitting 1 when the cable connecting body 30 is fitted to the main body 12.
6 (its illustration is omitted).

44 is a recess into which the protruding portion 29 of the insulator 28 is fitted.

45 is a receiving seat (the role of which will be described later); 46 is a heat shrinkable sleeve for reinforcing the insulating tube 36;

(3) Regarding the support 47: Used to prevent the cable connection body 30 fitted to the main body 12 from falling.

As shown in FIG.
It is bent into a letter shape (the middle part is omitted in Figure 7).

The upper end of the support 47 is attached to the lower end of the main body 12 with a bolt 48 so as to be swingable in the direction of an arrow 50.

A rod 52 is slidably passed through the lower side of the support 47 in the vertical direction, and a cap 5 is attached to the upper end of the rod 52.
4 is fixed, and a compression spring 56 is inserted between the cap 54 and the support 47.

(4) Regarding assembly: Rotate the support 47 so that it does not get in the way, and then fit the cable connection body 30 into the main body 12.

Then, the protruding portion 29 of the insulator 28 fits into the recess 44.
It fits snugly inside. At the same time, plug 34
is fitted into the socket 26, and the cable conductor 92 and the overhead wire 80 are connected.

Next, the support 47 is rotated, and as shown in FIGS. 5 and 6, the cap 54 is brought into contact with the receiving seat 45 of the cable connection body 30 and pushed up by the spring 56.

(5) Effect: When a short-circuit current flows through the cable conductor 92, the cable conductor 92 may melt depending on the conditions.

[Problems to be solved by the invention] (1) When the above-mentioned cable conductor 92 is fused,
An arc occurs at the location indicated by arrow 96.

Due to the pressure of this arc gas, the insulation cylinder 36
In some cases, the cable connection body 30 separates from the main body 12 due to the impact force at the time of destruction, an arc is generated between the plug 34 and the socket 26, and the insulating tube 36 and support 47 are scattered and fall onto the road. There is danger. Heat shrink tube 46 above
is provided for this reinforcement, but there is variation among workers during assembly, resulting in quality problems.

(2) Arc gas escapes to the plug 34 side and insulator 2
The interface between the protrusion 29 and the recess 44 of 8 may be contaminated. If the interface becomes conductive due to contamination, ground faults are likely to occur, making it impossible to retransmit power.

[Purpose of the invention] When the cable conductor 92 is fused, only the cable 90 is pulled out backward from the cable connection body 30 due to the pressure of arc gas, so that the above-mentioned problem does not occur.

[Means for Solving the Problems] This invention, as shown in FIGS. 1 to 3, includes: (1) A skirt 60 that opens rearward is provided at the rear of the terminal 32, and the terminal 32 is connected to the terminal 32 by the skirt 60. (2) sealing between the base of the plug 34 and the insulating tube 36; (3) forming a mechanical weak point 70 in the insulating tube 36 surrounding the end of the cable 90; The characteristics are as follows.

[Example] (Figs. 1 to 3) (1) A skirt 60 is integrally formed at the rear of the terminal 32. The skirt 60 is cylindrical and opens rearward.

Since the inner diameter of the skirt 60 is smaller than the outer diameter of the cable insulator 94, the end 95 of the cable insulator 94 is slightly tapered and inserted (FIG. 3).

(2) Also, a groove 62 is provided at the base of the plug 34, and an O-ring 64 is attached to the groove 62.

Further, in order to ensure the function of the O-ring 64, a metal ring 66 is embedded in the insulating cylinder 36 around the base of the plug 34.

(3) Conventionally, the insulating tube 36 on the end of the cable 90
The imaginary line 3 in Figure 1 focuses on assembly work.
It was thick like 7.

In the present invention, on the contrary, that part is made thinner. That is, the portion of the outer semiconducting layer 42 indicated by reference numeral 70 is made thinner to provide a mechanical weak point.

In other words, when a tensile force is applied, this part is made easier to tear.

[Function] (1) When the cable conductor 92 is fused at the location indicated by the arrow 96 and arc gas is generated, the arc gas is ejected to the rear side of the cable 90 because of the presence of the skirt 60. Therefore, a force that pushes the cable 90 backward acts.

Since the mechanical weak point 70 is created, the cable 90 can slip out backwards and the insulating tube 3
6 is prevented from being destroyed.

(2) The O-ring 64 prevents the arc gas from turning toward the plug 34 and the cable 90
Promote the escape of

Further, the protruding portion 29 of the insulator 28 and the recessed portion 44
Since it does not contaminate the interface, retransmission of power becomes possible.

[Effects of the invention] (1) A skirt 60 that opens to the rear is provided at the rear of the terminal 32, and the skirt 60 surrounds the cable conductor 92 connected to the terminal 32, so as described above, The ejection direction of arc gas generated at the time of a short circuit is on the cable 90 side.

Therefore, the cable 90 is facilitated to come out, and the insulating tube 36 is prevented from being broken and scattered.

(2) Since the space between the base of the plug 34 and the insulating tube 36 is sealed, arc gas is prevented from being ejected to the plug 34 side, and the cable 90 is further facilitated in coming out.

(3) Since the mechanical weak point 70 is provided in the insulating tube 36 surrounding the end of the cable 90, the cable 90 can easily escape due to arc gas.

[Brief explanation of drawings]

1 to 3 relate to an embodiment of the present invention, FIG. 1 is an explanatory diagram of a cable connecting body 30, and FIG. 2 is an explanatory diagram of a terminal 32.
FIG. 3 is an enlarged explanatory view of the dashed-dotted line portion in FIG. FIG. 5 is a schematic explanatory diagram of the whole, FIG. 6 is an explanatory diagram of a portion of the support 47 (as viewed from arrow B-B in FIG. 5),
FIG. 7 is an explanatory diagram of the cable connection body 30. 10...High voltage cable connection device, 12...Main body, 14...Insulator, 16...Lower metal fitting, 18...
Hook, 20... Upper metal fitting, 22... Presser metal fitting,
24... Conductor, 26... Socket, 28... Insulator, 30... Cable connection body, 32... Terminal, 3
4...Plug, 36...Insulating cylinder, 38...Inner semiconducting layer, 40...Insulating layer, 42...Outer semiconducting layer, 44...Recess, 45...Socket, 46...Heat shrink tube , 47... Support, 48... Bolt, 50... Arrow, 52... Rod, 54... Cap, 56... Spring, 60... Skirt, 62
... Groove, 64 ... O-ring, 66 ... Ring, 7
0... Weak point, 80... Overhead wire, 88... Auxiliary fittings, 90... Cable, 92... Cable conductor,
94... Cable insulator, 95... Cable insulator end, 96... Arrow.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a main body 12 and a cable connecting body 30 that is detachably fitted to the lower part of the main body 12; the main body 12 has an insulator 14, and an upper metal fitting of the insulator 14. A conductor 24 that grips the overhead wire 80 at 20 and connects to the upper metal fitting 20 at its upper end.
penetrates through the insulator 14 and protrudes below the insulator 14, forms a socket 26 at its lower end, and provides an insulator 28 around the conductor 24;
The terminal 32 is connected to the tip of the cable conductor 92, the plug 34 is provided integrally with the terminal 32, and the end of the cable 90, the terminal 32, and the plug 34 are connected to each other.
An insulating tube 36 is provided around the plug 34, and a recess 44 is provided around the plug 34; , and in a high-voltage cable connection device in which the plug 34 fits into the socket 26; A skirt 60 that opens rearward is provided at the rear of the terminal 32, and the skirt 60 connects the terminal 3.
A high-voltage cable connection device characterized in that it surrounds a cable conductor 92 connected to a cable conductor 92. (2) It consists of a main body 12 and a cable connecting body 30 that is removably fitted to the lower part of the main body 12; the main body 12 has an insulator 14, and the upper metal fitting 20 of the insulator 14 holds the overhead electric wire 80. , and a conductor 24 connected to the upper metal fitting 20 at the upper end.
penetrates through the insulator 14 and protrudes below the insulator 14, forms a socket 26 at its lower end, and provides an insulator 28 around the conductor 24;
The terminal 32 is connected to the tip of the cable conductor 92, the plug 34 is provided integrally with the terminal 32, and the end of the cable 90, the terminal 32, and the plug 34 are connected to each other.
An insulating tube 36 is provided around the plug 34, and a recess 44 is provided around the plug 34; and a high voltage cable connecting device in which the plug 34 fits into the socket 26; A high voltage cable connecting device characterized in that a seal is formed between the base of the plug 34 and the insulating tube 36. (3) It consists of a main body 12 and a cable connecting body 30 that is removably fitted to the lower part of the main body 12; the main body 12 has an insulator 14, and the upper metal fitting 20 of the insulator 14 holds the overhead electric wire 80. , and a conductor 24 connected to the upper metal fitting 20 at the upper end.
penetrates through the insulator 14 and protrudes below the insulator 14, forms a socket 26 at its lower end, and provides an insulator 28 around the conductor 24;
The terminal 32 is connected to the tip of the cable conductor 92, the plug 34 is provided integrally with the terminal 32, and the end of the cable 90, the terminal 32, and the plug 34 are connected to each other.
An insulating cylinder 36 is provided around the plug 34, and a recess 44 is provided around the plug 34; , and a high-voltage cable connection device in which the plug 34 fits into the socket 26; A high-voltage cable connection characterized in that a mechanical weak point 70 is provided in the insulating tube 36 surrounding the end of the cable 90. Device.