JPH08256424A - Clamp for installing interphase spacer - Google Patents

Abstract

PURPOSE: To provide a clamp for installing an interphase spacer with which a spacer can be installed on an electric cable with simple installation work easily in a short time. CONSTITUTION: In a clamp for installing an interphase spacer for installing both ends of an interphase spacer 12 to an electric cable 11, an installing section 23 to be installed on the electric cable 11 and a connecting section 24 to connect the interphase spacer 12 to the cable are installed separately. The installing section 23 is provided with a pair of holding members 25, 26 which are so assembled as to open and close freely and tightening members 30, 31 which tighten the holding members 25, 26 with the cable 11 being held between the holding members 25, 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interphase spacer for maintaining a space between electric lines in a transmission line or a distribution line, and more particularly to a mounting clamp for attaching both ends of the interphase spacer to an electric wire. is there.

[0002]

2. Description of the Related Art Generally, in a power transmission line, three-phase power transmission lines are installed on both sides of a steel tower at predetermined intervals in an upper stage, a middle stage and a lower stage. In such a transmission line, the transmission line vibrates greatly when strong winds or icing snow accrues on the transmission line, the distance between different phases becomes extremely small, and in the worst case, the transmission lines contact each other and the It may cause a short circuit. Therefore, an interphase spacer made of an insulating material is provided between the power transmission lines to prevent the power transmission lines from approaching each other abnormally.

Conventionally, when both ends of an interphase spacer of this kind are attached to an electric wire, an attachment clamp having a structure as shown in FIGS. 7 and 8, for example, is used in order to reduce strain generated when the electric wire vibrates. Has been done. This clamp 51
Is composed of a pair of suspending metal fittings 52, 53 having a two-divided structure, a side surface substantially U-shaped tightening metal fitting 54, a bolt 55 and a pair of nuts 56, 57.

When the interphase spacer 58 made of an insulating material is attached to the power transmission line 59 by using the clamp 51, the power transmission line 59 is covered with a rubber insert 60 having a two-part structure, and the outer periphery thereof is covered. The armor rod 61 is wound. In this state, a pair of suspension fittings 52, 53 are attached to the outer circumference of the armor rod 61, and a fastening fitting 54 is fitted on the outer circumference thereof. After that, the bolts 55 are inserted into the fastening fittings 54 and the insertion holes 62 of the suspension fittings 52 and 53, and the nuts 56 and 57 are screwed into the bolts 55, so that the clamp 51 is attached to the power transmission line 59.

In this way, the clamp 51 is mounted on the transmission line 59.
, Is once attached, the nuts 56 and 57 are loosened, and the bolt 55 is pulled out from the insertion hole 62. Then, when the bolt 55 is reinserted into the insertion hole 62, the mounting metal 6 at the tip of the interphase spacer 58 is attached to the bolt 55.
3 is inserted. Then, bolts 55 and nuts 56, 5
7 is screwed to connect the interphase spacer 58 to the clamp 51.

[0006]

However, in the conventional clamp for mounting the interphase spacer, the power transmission line 59 is used.
With the insert 60 and the armor rod 61 attached, it is necessary to sandwich them with a pair of suspension fittings 52 and 53, and to fit a fastening fitting 54 on the outer periphery thereof. Therefore, there is a problem in that the work of attaching the clamp 51 to the power transmission line 59 is troublesome and time-consuming.

Further, in the conventional clamp for mounting the interphase spacer, since the fastener 54 is formed in a substantially U-shaped side face, the fastener 54 is attached to the hanging hardware 52, 53.
When it is fitted in, it tends to be in a state in which both side ends thereof spread outward. Therefore, the fastener 54 and the hanging fixture 5
There is also a problem that the insertion holes 62 of 2, 53 are not arranged on the same axis, and it becomes difficult to insert the bolt 55 into the insertion holes 62.

Furthermore, in the conventional clamp for mounting the interphase spacer, a set of bolts 55 and nuts 56, 57 is provided.
Thus, the clamp 51 is attached to the power transmission line 59 and the interphase spacer 58 is connected to the clamp 51. Therefore, the transmission line 59
It is necessary to pull out the bolt 55 and connect the interphase spacer 58 after the clamp 51 is once mounted on the upper part, and there is a problem that the work is complicated and takes time. Further, since the connecting work of the interphase spacer 58 is performed on the electric wire, the bolt 55 and the nuts 56 and 57 may be accidentally dropped.

The present invention has been made by paying attention to the problems existing in such conventional techniques. Its main purpose is to provide an interphase spacer mounting clamp that can be easily and quickly mounted on an electric wire by a simple mounting operation.

Another object of the present invention is to provide a clamp for mounting an interphase spacer, which does not need to connect the clamp and the interphase spacer on an electric wire and can perform the connecting work in advance easily and in a short time on the ground. To provide.

[0011]

In order to achieve the above-mentioned object, in the invention according to claim 1, in an interphase spacer attaching clamp for attaching both ends of the interphase spacer to an electric wire, an attachment portion to be attached to an electric wire is provided. , A connecting portion for connecting the interphase spacers is separately provided, and the attaching portion is provided with a pair of sandwiching members assembled so as to be openable and closable, and a wire sandwiched between the sandwiching members. And a tightening means for tightening the member.

According to a second aspect of the present invention, in the interphase spacer mounting clamp according to the first aspect, the connecting portion is arranged on one of the sandwiching members. According to a third aspect of the present invention, in the interphase spacer mounting clamp according to the first aspect, the tightening means includes a bolt rotatably supported by one sandwiching member, and the bolt sandwiching the other bolt. The nut is screwed to the bolt in a state of being engaged with the forked portion of the attachment member.

[0013]

When the interphase spacer attaching clamp configured as described above is used to attach the interphase spacer to the electric wire, the interphase spacer is connected to the connecting portion of the clamp on the ground in advance. Then, in a state where the insert and the armor rod are wound around the electric wire, a pair of sandwiching members are attached to the outer periphery of the wire by an opening / closing operation. After that, the bolt supported by one of the sandwiching members is rotated to engage the forked portion of the other sandwiching member, and when the nut is tightened on the bolt in this state, both sandwiching members are placed on the wire. Fixed,
The ends of the interphase spacers are attached to the wires.

[0014]

First Embodiment A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 2, the three-phase power transmission line 11 is installed at predetermined intervals at the upper, middle, and lower stages on both sides of a tower (not shown). The interphase spacer 12 is interposed between the power transmission lines 11, and a predetermined space is secured between the power transmission lines 11 to prevent abnormal proximity between them.

The interphase spacer 12 is composed of a pair of upper and lower spacer bodies 13 and a connecting pipe 14 made of a steel pipe or the like connected between the spacer bodies 13. Each spacer body 13 is configured by connecting a pair of long-distance insulators 15 to each other, and a large number of cap portions are formed on the outer circumference of the long-distance insulators 15 to secure a predetermined insulation distance.

The pair of clamps 16 are rotatably attached to the upper and lower ends of the interphase spacer 12 via adapters 17. Then, as shown in FIGS. 1 to 4, the power transmission line 1
1, rubber insert 18 and armor rod 1 on the outer circumference
By attaching the clamps 16 to the outer circumferences of the windings 9, the ends of the interphase spacers 12 are fixed to the power transmission line 11.

A pair of corona rings 20 are attached to each of the adapters 17 via a mounting plate 21, and they alleviate the electric field in the vicinity of both ends of the interphase spacer 12 to suppress the generation of corona discharge. A plurality of arc horns 22 are attached to both ends of each long insulator 15 so as to guide an arc generated at the time of abnormality to the outside of the long insulator 15.

As shown in FIGS. 1, 3 and 4, each of the clamps 16 has a mounting portion 2 for mounting on the power transmission line 11.
3 and a connecting portion 24 for connecting the interphase spacer 12 are separately provided. The first and second mounting portions 23
The pinching members 25 and 26 are attached to the side ends thereof so as to be openable and closable by the pin 27, and arc-shaped pinching recesses 25a and 2 for pinching the power transmission line 11 on their opposing surfaces.
6a is formed. The forked portion 28 is the first holding member 25.
Is formed at the tip end of each of them, and an engaging portion 29 is projectingly provided on the outer surface thereof.

The bolt 30 is rotatably attached to the tip of the second sandwiching member 26 by a pin 31, and a pair of nuts 32 are screwed through a washer 33 to the thread portion of the tip. In this embodiment, the bolt 30 and the nut 32 form a tightening member as a tightening means. Then, the power transmission line 11 is sandwiched between the sandwiching members 25 and 26.
After sandwiching, the bolt 30 is engaged with the forked portion 28, and the nut 32 is tightened in this state, so that the washer 33
Is locked to the locking portion 29, and the clamp 16 is connected to the power transmission line 11
Fixed to.

On the other hand, the connecting portion 24 is provided with a first clamping member 25 in addition to the fastening means including the bolt 30 and the nut 32.
It is located above. That is, the pair of mounting legs 34 are formed on the outer peripheral surface of the first sandwiching member 25 so as to project at predetermined intervals, and the insertion hole 35 is formed in the center thereof. The knurling collar 36 and the soundproof spring 37 are arranged in the insertion holes 35 of the mounting legs 34, respectively.

The bolt 38 is inserted into the insertion hole 35 of the mounting leg 34 through the adapter 17 in a state where the adapter 17 of the interphase spacer 12 is arranged between both mounting legs 34, and the nut 39 and the loosening preventive are provided on the tip screw portion thereof. Pipe 40 is washer 4
It is screwed through 1. Therefore, prior to attaching the clamp 16 to the power transmission line 11, the bolt 16 and the nut 39, etc. are used in advance to fix the clamp 16 on the ground.
The interphase space 12 can be connected to the mounting leg 34 of.

Next, the operation of the clamp for mounting the interphase spacer constructed as described above will be described. When the interphase spacer 12 is attached to the power transmission line 11 using the clamp 16 of this embodiment, the interphase spacer 12 is previously mounted on the ground between the mounting legs 34 on the clamp 16 by the connecting bolt 38 and the nut 39. The adapter 17 of is connected. Then, the insert 1 is provided on the outer periphery of the power transmission line 11.
8 and the armor rod 19 are wound, the pair of sandwiching members 25 and 26 are opened, and the sandwiching recess 25a of the first sandwiching member 25 is fitted onto the outer periphery of the armor rod 19.

Thereafter, the second holding member 26 is closed, the holding recess 26a is fitted on the outer periphery of the armor rod 19, and the bolt 30 is rotated to engage with the fork 28. When the nut 32 is tightened in this state, the washer 3
3 is locked by the locking portion 29, both sandwiching members 25, 26 are held in the closed state, and thereby the clamp 16 is fixed to the power transmission line 11.

As described above, in the clamp 16 of this embodiment, the mounting portion 23 for mounting on the power transmission line 11 is used.
And a connecting portion 24 for connecting the interphase spacer 12 are separately provided. Therefore, the interphase spacer 12 can be connected to the clamp 16 on the ground in advance. Therefore, as in the conventional configuration shown in FIGS. 7 and 8,
On the power line, after attaching the clamp to the power line,
It is not necessary to perform the troublesome work of connecting the interphase spacer to the clamp, and the connection work can be performed easily and in a short time on the ground.

Further, since the work of connecting the interphase spacer 12 to the clamp 16 can be performed on the ground, even if the work of connecting the interphase spacer 12 is performed by pulling out the bolt 38 from the insertion hole 35 of the mounting leg 34, it is possible to make a mistake. It is possible to prevent the bolt 38 and the nut 39 from dropping.

Further, in the clamp 16 of this embodiment, the pair of clamping members 25 and 26 are opened and closed to transmit the power transmission line 1
1 is fitted to the outer periphery of the bolt 1, and the bolt 30 and the nut 3
By tightening both sandwiching members 25, 26 at 2,
The clamp 16 can be fixed to the power transmission line 11. Therefore, compared with the conventional configuration shown in FIGS. 7 and 8, the clamp 16 can be attached to the power transmission line 11 easily and in a short time by a simple attachment work.

[0027]

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIG.
And FIG. 6 will be described. Now, in this example,
The first sandwiching member 25 and the second sandwiching member 26 in the mounting portion 23 are assembled at the lower end portion by a pin 27 so as to be openable and closable. The long hole 45 is formed in the intermediate portion of the first holding member 25, and an insertion hole 46 is formed at the tip of the second holding member 26 so as to correspond to the long hole 45. Then, with the power transmission line 11 sandwiched between the sandwiching members 25 and 26, the headed bolt 47 as a fastening member is inserted into the long hole 45 and the insertion hole 46, and the nut 32 is attached to the tip screw portion. The clamp 16 is fixed to the power transmission line 11 by screwing.

The long hole 45 is formed so that the inner diameter in the long axis direction becomes gradually smaller toward the end facing the insertion hole 46. For this reason, both clamping members 2
Even when the transmission lines 11 and 5 and 26 are in the half-opened state and the long hole 45 and the insertion hole 46 do not correspond to the approaching positions, the bolt 47 is inserted from the long hole 45 into the insertion hole 46. Can be easily inserted.

Further, in this embodiment, the pair of mounting legs 34 of the connecting portion 24 are integrally formed at the tip of the first holding member 25. Then, similarly to the above-described first embodiment, the bolts 38 are inserted through the insertion holes 35 of the both mounting legs 34 through the adapter 17 of the interphase spacer 12, and the nut 39 is screwed into the tip threaded portion thereof, whereby the interphase The spacer 12 can be connected to the clamp 16.

Therefore, also in the second embodiment, as in the case of the first embodiment, the clamp 16 and the interphase spacer 12 can be connected on the ground in advance easily and in a short time. , The clamp 16 to the transmission line 1
It can be easily and quickly attached to the No. 1 by a simple attaching operation.

The present invention can be modified and embodied as follows. (A) In the first embodiment, the bolt 3 as a tightening member
0 is rotatably attached to the tip of the first holding member 25, and the forked portion 28 is formed on the tip of the second holding member 26. (B) In the first and second embodiments, the first sandwiching member 25
A friction imparting member such as a leaf spring is interposed in the shaft attachment portion between the second clamping member 26 and the second clamping member 26 so that both clamping members 25 and 26 are frictionally held at arbitrary rotational positions. (C) The present invention is applied to a mounting clamp for mounting an interphase spacer between distribution lines in a distribution line. (D) A polymer insulator is used instead of the long insulator 15 of the interphase spacer 12.

Further, the technical idea grasped from the above embodiment will be described below. (1) The interphase spacer mounting clamp according to claim 1, wherein a friction applying member is interposed between the shaft attaching portions of the pair of sandwiching members that are openably and closably assembled. According to this structure, both the sandwiching members can be frictionally held at any rotation position. (2) A mounting portion to be attached to the electric wire and a connecting portion for connecting the interphase spacer are separately provided, and the mounting portion has a pair of clamp members assembled so as to be openable and closable, and the electric wire between the clamp members. In the interphase spacer mounting clamp provided with a clamping means for clamping both clamping members in a clamped state, a state in which the interphase spacer is attached to the connecting part in advance and the electric wire is clamped between the pair of clamping members. Then, the interphase spacer attachment method of tightening the electric wire by the tightening means for tightening both the sandwiching members. By this method, the work of connecting the clamp and the interphase spacer can be easily and quickly performed on the ground in advance, and it is not necessary to perform the work of connecting on the electric wire.

[0033]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following effects. According to the invention described in claims 1 to 3, the clamp can be attached to the electric wire easily and in a short time by a simple attaching operation.

Further, according to the invention described in claims 1 to 3, it is not necessary to connect the clamp and the interphase spacer on the electric wire, and the connecting work can be performed on the ground in advance easily and in a short time. You can

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a clamp for mounting an interphase spacer according to a first embodiment.

FIG. 2 is a front view showing a state in which an interphase spacer is attached between electric wires.

3 is a front view of the interphase spacer mounting clamp of FIG. 1. FIG.

FIG. 4 is a plan view of a clamp for mounting the interphase spacer.

FIG. 5 is a side sectional view showing a clamp for mounting an interphase spacer according to a second embodiment.

FIG. 6 is a front view of the interphase spacer mounting clamp.

FIG. 7 is a front view of a conventional clamp for mounting an interphase spacer.

FIG. 8 is a side sectional view of the interphase spacer mounting clamp.

[Explanation of symbols]

11 ... Transmission line, 12 ... Interphase spacer, 13 ... Spacer body, 14 ... Connection pipe, 16 ... Clamp, 18 ... Insert, 19 ... Armor rod, 23 ... Attachment part, 24 ... Connection part, 25 ... 1st clamping member, 26 ... 2nd clamping member, 28 ...
Bifurcated portion, 30 ... Bolts as tightening members constituting tightening means, 32 ... Nuts as tightening members constituting tightening means, 34 ... Mounting legs, 38 ... Bolts of connecting portions, 39 ... Connecting portions , 47 ... Bolts as tightening members constituting the tightening means of the second embodiment.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ikko Kawai, 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Ltd. (72) Masataka Sannohe 1-1-5, Kiba, Koto-ku, Tokyo Shares Inside Fujikura

Claims (3)

[Claims] 1. An interphase spacer mounting clamp for mounting both ends of an interphase spacer to an electric wire, each of which is provided with a mounting portion for mounting on the electric wire and a connecting portion for connecting the interphase spacer, and the mounting portion can be opened and closed. A clamp for mounting an interphase spacer, comprising a pair of sandwiching members assembled to each other, and a tightening means for tightening both sandwiching members with the electric wire sandwiched between the sandwiching members. 2. The clamp for mounting the interphase spacer according to claim 1, wherein the connecting portion is provided on one of the sandwiching members. 3. The tightening means includes a bolt rotatably supported by one of the sandwiching members, and a screw on the bolt while the bolt is engaged with a fork of the other sandwiching member. The interphase spacer mounting clamp according to claim 1, comprising a nut to be fitted.