JPH01186516A - Fitting tool for lighting protecting insulator, discharge electrode or heavy bob - Google Patents

Abstract

PURPOSE:To prevent the displacement of a lightning protecting insulator or the like used in a low-voltage transmission line in particular by coupling the crevice section of a cap metal with fastening rings or a whirl stop arm with a coupling recess. CONSTITUTION:A fitting tool 16 is fitted to a cap metal 8. In this fitting tool 16, fastening rings 17 and 18 are fastened to the protruded section 8b of the cap metal 8 with bolts 19 and nuts 20. A whirl stop arm 21 is erected obliquely upward to one fastening metal 8 and enters between parallel crevice sections 8a to restrict the fitting positions of the fastening rings 17 and 18. A bracket section 22 is installed to fit a lightning protecting insulator 24. The fitting position of the lightning protecting insulator, a discharge electrode or a heavy bob can be maintained at normal positions over a long period, and the fitting is facilitated.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention promptly discharges lightning surge current to the ground when it flows through a power transmission line or distribution line, and also discharges the subsequent commercial frequency follow-on current. This invention relates to a fixture used to mount a lightning arrester, a discharge electrode, a balance weight, etc. that can be suppressed and shut off.

(Prior Art) Conventionally, as shown in FIG. 5, the present applicant used bolts 41 and naphts 42 to tighten the lower half of a cap fitting 8 fitted and fixed to a long insulator 7 as a mounting device for a lightning arrester. We have proposed a structure consisting of two halves of tightening rings 43 and 44 that are fitted together, and a bracket 45 that is fixed to one of the rings and is used to connect the lightning arrester. (Refer to Japanese Unexamined Patent Application Publication No. 1981-195812.) (Problem to be Solved by the Invention) However, the above-mentioned mounting device is difficult to use when the line voltage is high.
It is suitable for heavy lightning arresters used in class, but for example? As a fixture for supporting light and heavy lightning arrester insulators used in low-power transmission lines of 7KV, there was a problem in that the design was useless in terms of mechanical strength.

In addition, the tightening state for the cap fitting 8 is determined by the tightening ring 43.
．． 41, so if the lightning arrester is subjected to vibration or wind pressure, it will relative rotate and shift in position during long-term use, causing the arc horn attached to the tip of the lightning arrester to shift. There was a problem in that the discharge gap between the arc horn and the arc horn attached to the power transmission line side changed.

Furthermore, since the tightening rings 43 and 44 are large and cylindrical, a large amount of material is used, which makes it impossible to reduce the cost of the product.

An object of the present invention is to provide a fixture for a lightning arrester, etc., which can prevent the displacement of the lightning arrester, etc. used particularly in low voltage power transmission lines, and which can reduce material costs.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an annular projection that is engaged with an annular protrusion formed on the outer peripheral edge of the proximal end of a cap fitting that is fitted and fixed to an insulator. a clamping ring, a bracket fixed to the clamping ring and for attaching a lightning arrester, a discharge electrode, a weight, etc.; The mechanism is constructed by a rotation prevention arm that is fitted together.

(Function) The present invention provides a tightening ring that is tightened and fixed by engaging only the protrusion of a camping fitting, and a ring that is attached to the tightening ring and is engaged with a clevis portion or an engagement recess of a cap fitting. Since it is constructed with a stop arm, it is possible to reduce the weight, and also to ensure that the lightning arrester, discharge electrode, etc. are installed in the normal position for a long period of time.
It is also possible to reduce costs by reducing material costs.

(Example) Hereinafter, an example in which the fixture of the present invention is applied to a lightning arrester will be described based on FIGS. 1 and 2.

As shown in FIG.
A clevis link 4 is supported so as to be rotatable in a direction perpendicular to the track. A connecting link 5 is connected to the lower end of the clevis link 4 by a connecting pin 6 so as to be rotatable in the track direction. Further, a cap fitting 8 is suspended from the lower end of the connecting link 5 so as to be rotatable in the track direction, and is fitted and fixed to the upper end of the long insulator 7 by a connecting pin 9.

This cap fitting 8 is provided with a flat recessed portion 8a at its upper end.

A connecting link 11 is rotatably connected to the camp fitting 10 fitted and fixed to the lower end of the long insulator 7 by a connecting pin 12, and a power transmission line 13 is connected to the connecting link 11.
A wire clamp 14 for supporting the wire is rotatably supported by a connecting pin 15.

A fitting 16 according to the present invention is attached to the cap fitting 8. As shown in FIG.
and two split tightening rings 17 and 18 which are tightened by the nut 20, and one of the tightening rings 18, which is erected diagonally upward, and which enters between the horizontal recess portion 8a and is tightened. It is composed of a detent arm 21 that restricts the mounting position of the rings 17 and 18, and a bracket portion 22 that mounts a lightning arrester 24, which will be described later.

At both ends of the tightening ring 17, 18 there is a flange portion 1 having insertion holes 17a, 18a for the bolt 19, respectively.
7b and 18b are formed.

A disk-shaped mounting seat 2 is provided at the tip of the bracket throat portion 22.
3 is fixed by welding or the like. And this mounting seat 2
3, an electrode fitting 25 on the ground side of the lightning arrester 24 is fixed by a bolt 26 in a cantilevered manner in the horizontal direction.

An arc horn 28 serving as a discharge electrode on the ground side is attached to the electrode fitting 27 on the power supply side of the lightning arrester 24 facing downward.

The lightning arrester 24 includes a voltage-resistant insulating tube (as shown), the electrode fittings 25 and 27 attached to both ends thereof, and an oxidized insulator having non-linear voltage-current characteristics housed inside the voltage-resistant insulating tube. It is composed of a current limiting element 29 mainly made of zinc and an insulating jacket 30 molded around the outer periphery of a voltage-resistant insulating tube.

On the other hand, a tightening ring similar to the tightening ring 17, 18 is also attached to the cap fitting 1o at the lower end,
One of the tightening rings 17 supports an arc horn 31 as a discharge electrode on the energized side, which faces the arc horn 28 with a predetermined air discharge gap G therebetween.

Further, the pair of upper and lower tightening rings 18 are provided with an arc horn 32 for preventing damage to the long insulator 7 when the long insulator 7 flashes along its surface.
．． 33 is supported.

Next, the operation of the lightning arrester constructed as described above will be explained.

Now, with the lightning arrester installed on the tower, the power transmission line 1
3, when a lightning surge current flows, the current is flooded over from the arc horn 31 on the power transmission line side to the arc horn 28 at the lower end of the lightning arrester, and flows through the electrode fitting 27, current limiting element 29, electrode fitting 25, and mounting seat on the power supply side. 23, bracket part 22,
Through the tightening ring 17, cap fitting 8, connecting link 5, U clevis link 4, hanging fitting 2 and support arm 1,
It flows to the steel tower and is discharged to the ground.

Further, the subsequent flow generated after that is caused by both the arc horns 28.31
The current is suppressed and interrupted by the discharge gap G and the current limiting element 29.

Now, in the embodiment of the present invention, the locking arm 21 is fixed to one of the clamping rings 17 and 18 which engage only the protrusion 8b of the cap fitting 8 and are tightened and fixed.
7. Even if the tightening force of 18 is not so strong, tightening ring 1
7.18 can be maintained in the normal position for a long period of time. As a result, the discharge gap G between the arc horn 28 of the lightning arrester 24 and the arc horn 31 on the power transmission line side can be kept constant, and the discharge characteristics can be stabilized. In addition, the cost of materials can be kept to the minimum necessary to reduce the cost of the product.

Note that the present invention can also be embodied as follows.

(1) As shown in FIG. 3, the mounting rod 34 is fixed to the tightening ring 18, and the lightning arrester 24 is
Attach a weight 35 that balances the load.

(2) As shown in FIG. 3, a detent arm 21 is provided on the tightening ring 18 side.

(3) As shown in FIG. 4, the lightning arrester 24 is attached vertically to the cap fitting 8 on the ground side of the long insulator 7 of the tension insulator device, and the long insulator is attached to the tightening ring 18. Attach arcing rings 36 and 37 to prevent damage to the insulator during creeping flash in step 7.

(4) In the above embodiment, the tightening ring was split into two, but
This can be made into a ring with one notch or divided into three or more parts.

(5) Engage the tip of the detent arm 21 with the engagement recess (as shown) of the socket clevis formed at the upper end of the cap fitting 8.

Effects of the Invention As detailed above, the present invention can maintain the mounting position of the lightning arrester, discharge electrode, weight, etc. in the normal position for a long period of time, reduce the cost of materials, and reduce the installation cost. The effect is that it can be easily carried out.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention as a mounting fixture for a lightning arrester, Fig. 2 is a front view showing the entire lightning arrester device for power transmission lines, and Fig. 3 is a separate structure of the present invention. FIG. 4 is a front view showing another usage example of the present invention, and FIG.
The figure is a partially cutaway front view showing a conventional fixture. 7...Long stem insulator, 8...Cap metal fitting, 8a...
Clevis portion, 8b... Projection portion, 16... Mounting tool, 1
7゜18... Tightening ring, 17a, 18a... Insertion hole, 17b, 18b... Flange portion, 19... Bolt, 20... Nut, 21... Detent arm, 2
2...Bracket part, 23...Mounting seat, 24...
Lightning arrester, 31... Arc horn, 34... Mounting rod, 35... Weight.

Claims (1)

[Claims] 1. An annular tightening ring that is engaged with an annular protrusion formed on the outer periphery of the proximal end of the cap fitting that is fitted and fixed to the insulator; a lightning arrester that is fixed to the tightening ring; A lightning arrester comprising: a bracket portion for attaching a discharge electrode or a weight; and a detent arm that is engaged with a clevis portion or an engagement recess of the cap fitting with respect to the tightening ring. Fixtures for insulators, discharge electrodes, weights, etc.