JPS6212012A - Thunderproof horn insulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention is intended to quickly ground the abnormal high voltage caused by lightning when it is applied to a power transmission line, and to prevent the subsequent arcing from occurring. The present invention relates to a lightning horn insulator device for overhead power transmission lines, particularly for tension towers, for preventing power transmission lines from melting down.

(Prior Art) Conventionally, as a device for installing a lightning arrester with a predetermined air discharge gap on a power transmission line, for example,
There was a device disclosed in Publication No. 8.

As shown in FIG. 9, this device fixes a tension-resistant insulator 47 that supports an electric wire 46 to a tower body T, and
A lightning arrester 49 in which a valve resistance element (non-linear resistance element) is enclosed is integrally formed on the upper side via a support fitting 48, and an electrode 50 provided at the tip of the same tension type insulator 47, The lightning arrester 49 was configured to face an electrode 51 provided at the tip of the lightning arrester 49 with an air discharge gap G' in between.

(Problems to be Solved by the Invention) However, in the conventional device, the base end of the tension-resistant insulator 47 and the base end of the support fitting 48 are integrally formed, so that the existing tension-resistant insulator It was difficult to attach the lightning arrester 49 using the lightning arrester 47 and configure the device. Also, lightning insulator 49
When stress concentration occurs in the tension-resistant insulator 47 and the support metal fittings 48 due to the bending moment due to its own weight, or when the electric wire 46 vibrates due to wind, the device swings irregularly, causing the tension-resistant insulator 47 and the support metal fittings to 48 and the lightning arrester 49 may be subjected to bending load or torsional force, which may reduce the mechanical strength of the device. Furthermore, the lightning insulator 49 is a tension-resistant insulator 47.
Since the lightning arrester 49 was supported upward, rainwater and snow from the lightning arrester 49 not only migrate to the tension-resistant insulator 47, reducing its stain resistance, but also make the lightning arrester 49 look like the tension-resistant insulator 47 when viewed from the ground. It was difficult to observe because it was located above the ground, making inspection work difficult.

In view of the above circumstances, the present invention aims to provide a lightning-resistant horn insulator device that can be applied to existing tension-resistant insulator devices.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention connects the tension insulator 17 to the support arm 1 of the tower body via the tower body side connecting fitting, and also An electric wire 26 is installed on the tension insulator 17 via a wire-side connecting fitting, and an adapter 10 is attached to the tip of the support arm 1, facing forward and rising upward of the support arm 1. A lightning arrester 34 is suspended and fixed at the tip, and the upper end of the lightning arrester 34 is positioned above the tip of the support arm 1, and a discharge electrode 29 on the energizing side is connected to the wire side connecting fitting. A configuration is adopted in which the discharge electrode 36 supported and attached to the lower end of the lightning arrester 34 and the discharge electrode 29 on the energized side face each other with a predetermined air discharge gap G.

(Operation) This invention operates as follows by employing the above means.

When the electric wire swings due to wind pressure or the like, the tension insulator 17 swings around the tower side connecting fitting. At this time, the tension insulator 17 swings independently of the lightning arrester 34, and unreasonable stress concentration does not occur in the tower side coupling fittings, the adapter 10, the lightning arrester 34, and the tension insulator 17.

Moreover, snow caps and rainwater on the support arm 1 are not transferred to the lightning arrester 34 through the adapter 10.

Furthermore, Adapter 1 can also be used with existing tension insulator equipment.
This is simply done by attaching the lightning arrester through the 0.

Furthermore, since the adapter IO or the lightning arrester 34 is fixed in a hanging manner, no bending load is applied to the lightning arrester 34.

(Embodiment) Hereinafter, an embodiment embodying the present invention will be described in detail based on FIGS. 1 to 7.

As shown in FIG. 4, the support arm 1 of the tower body is interposed between a pair of left and right horizontal support frames 2 and 3 and the tips of the horizontal support frames 2 and 3, and is secured by a bolt 4 and a nut 4a. The connecting plate 5 is fixed, the inclined frame 7 is connected to the connecting plate 5 by a bolt 6 and a naso T-6a, and the bottom surface of the tip of the horizontal support frame 2.3 is connected by a bolt 8 and a nut 8a. It is composed of a mounting bracket 9 for a tension-resistant insulator to be fixed.

The bolts 8 are attached to the support frame 2.3 in the existing tower body.
In this embodiment, the existing short bolts are replaced one by one with long bolts 8 in the installed state, and then
A lightning arrester 3 which will be described later using the upper end of the same bolts 8 to 8.
4. The adapter 0 for mounting is attached by the naso 1-8b. This adapter 10 faces the front of the support arm 1 in the attached state shown in FIG. There is.

Next, a pair of tension insulator devices connected to both left and right ends of the mounting bracket 9 will be explained based on FIG. 2.3.

A U clevis 11 is fixed to the mounting fitting 9 with bolts, and a U clevis 12 is rotatably connected to the clevis 11. An arc horn 13 is attached to the U clevis 12.
A tower-side horn mounting bracket 13 equipped with a shaft 13 is connected to be relatively rotatable in the vertical direction by a shaft 14, and a pole clevis 16 is connected to one end of the bracket 13 to be relatively rotatable in the vertical direction by a shaft 15. A tension insulator 17 is connected via the. In this example, the above-mentioned [Noclevis 11゜12
, tower side horn mounting bracket 13, and pole clevis 16
This constitutes the tower body side connecting fitting.

A socket clevis 1 is provided at the end of the tension insulator 17 on the power supply side.
A wire-side horn mounting bracket 19 equipped with an arc horn 19A is connected via a shaft 20 so as to be relatively rotatable in the vertical direction. One end of the horn mounting bracket 19 has a shaft 2.
A parallel clevis link 22 is connected to the clevis link 22 so as to be relatively rotatable in the vertical direction by a shaft 23, and a connecting link 24 is connected to the clevis link 22 so as to be relatively rotatable in the vertical direction. Wire 2 via clamp 25
6 is supported. Further, a jumper wire 27 is connected between the wire clamp 25 and the wire crank 25 of the left tension insulator 17. In this embodiment, the above-mentioned socket clevis 18, wire side horn mounting bracket 19,
The parallel revis link 22, the connecting link 24, and the wire clamp 25 constitute a wire side connecting fitting.

As shown in FIGS. 1 to 3, the electric wire side horn mounting bracket 19 has a base end side of an arc horn 29 serving as a discharge electrode on the power supply side connected to a pole 1-1 in a direction perpendicular to the line through a mounting bracket 28.
30, and its tip side extends obliquely upward. Further, a rod 32 is fixed to the opposite side of the horn mounting bracket 19 from the arc horn 29 via a mounting bracket 31, and a weight 33 is attached to the tip of the rod 32. Balanced with weight, arc horn 29
is maintained in a stable state.

On the other hand, on the lower surface of the tip of the adapter 10, as shown in FIG. 1, a lightning arrester 34 having a built-in resistance element with non-linear voltage-current characteristics is suspended downward and fixed. As shown in FIG. 5, a supporting member 3 is attached to the lower end of the lightning arrester 34.
An arc horn 36 as a discharge electrode is attached via 5.

The support member 35 is composed of a pair of clamping pieces 35a, 35a for clamping and fixing the arc horn 36 with a bolt 37 so that the position in the axial direction can be adjusted. The support member 35 is attached to and detached from the tip of the support tube 39 having the flange portion 39a attached to the tip electrode 38 of the lightning arrester 34 via the base end cylindrical portion 35b at the pole I.40. It can be screwed and fixed. The base end of the flange portion 39a of the support tube 39 is fitted into the recess 38a of the electrode 38, and the other end of the flange portion 39a is fitted into the support tube 39.
A holding member 41 having a hole 4 ], a through which the tip of the hole is inserted.
The holding member 4 is fitted into the recess 41b of the
1 is pressed to fix the support cylinder 39. By loosening the bolt 42 of the support tube 39, the inclination angle of the arc horn 36 in the horizontal plane direction can be rotated and adjusted.

As shown in FIG. 6.7, the arc horn 36 is provided with a rotary support cylinder 43 for bending at its intermediate portion.

The rotation support cylinder 43 includes a pair of upper and lower discs 43a, 43a, a support shaft 44b connecting their centers, and a support shaft 44b.
The rotating cylinder 44C is fitted onto the upper part of the rotating cylinder 44C so as to be relatively rotatable.

The rotary cylinder 44c has a long hole 44 formed in a semicircular arc shape.
d is provided so that the port 45 can slide within the elongated hole 44d. Moreover, the side disks 44a, 44a
A base end 36a of the arc horn 36 is connected to a support portion 44e integrally provided on one side, and a distal end 36b of the arc horn 36 is connected to one side of the rotating tube 44c. There is. Then, by loosening the port 45 and rotating the tip side 36b of the arc horn 36 in the direction of the arrow in FIG. 6, the horizontal bending angle of the intermediate portion of the arc horn 36 is adjusted. The arc horn 36 configured in this manner faces the arc horn 29 supported by the tension insulator 17 with a predetermined air discharge gap G therebetween.

Note that the rotation support tube 43 may be arranged so that its bending angle in the vertical direction can be adjusted.

Here, in order to operate this device normally, the insulation strength of the air discharge gap G is configured to have a margin of at least a certain value with respect to the insulation strength of the lightning arrester 34.

Next, the operation of the lightning horn insulator device configured as described above will be explained.

Now, when an abnormally high voltage caused by a lightning strike is applied to the electric wire 26, the current at this time is discharged in the air discharge gap G properly maintained between the arc horn 29 and the arc horn 36, and the lightning arrester It flows through a non-linear resistance element built in 34 to the support arm l of the tower body. Furthermore, the subsequent arc generated thereafter is blocked by the air discharge gap G and the nonlinear resistance element. On the other hand, if the insulation strength is reduced due to abnormal contamination or other reasons and an arc occurs along the surface of the tension insulator 17, the arc will be generated in the air discharge gap between the arc horns 19A and 13A, and the tension insulator 17 will be arced. Burnout is prevented and arc propagation to the tower body is also prevented.

The device of this embodiment allows the adapter 10 to be attached to the support arm 1 without having to replace or move the existing tension insulator 17 attached to the support arm 1 of the tower body.
A lightning horn insulator device can be constructed by simply attaching the lightning arrester 34 through the lightning arrester 34, and therefore the scope of application is expanded and is very practical.

Furthermore, even if the tension insulator 17 rotates around the U clevis 12 due to shaking due to wind pressure or the like acting on the electric wire 26 in the pole mounted state, the lightning arrester 34 is not affected at all, and therefore, the tension insulator 34 is not affected at all. 17. There is no unreasonable stress concentration on the tower side connecting fittings and the lightning arrester 34, and the mechanical strength of the device is improved.

Furthermore, in this embodiment, since the base end of the lightning arrester 340 is located above the tip of the support arm 1, rainwater and snow from the support arm 1 do not move to the lightning arrester 34. The stain resistance of the lightning arrester 34 is improved.

Furthermore, compared to a lightning horn insulator device in which the lightning arrester 34 is located between the tower body and the electric wire 26, it is easier to ensure a safe distance between the tower body and the lightning arrester 34.

Further, the tension insulator 17 hooked to the support arm 1 is slightly deflected downward due to its gravity, and the central axis of the tension insulator 17 forms a different catenary angle with respect to the horizontal plane for each tower body. For this reason, the opposed state of the arc horns 29 and 36 attached to the tension insulator 17 and the lightning arrester 34 varies somewhat depending on the tower body. Therefore, the angle of the arc horn 36 can be adjusted by rotating it in a direction perpendicular to the lightning arrester 34, or the length in the track direction can be adjusted by sliding it within the support member 35, or the length of the arc horn 36 in the direction of the track can be adjusted by rotating it in the direction perpendicular to the lightning arrester 34. By adjusting the bending angle, the opposing state of the arc horns 29, 36 can be easily corrected, and a predetermined aerial discharge gap G can be set. From this point of view as well, the scope of application to the tower body becomes wider.

Since the grounding states of the tension insulator 17 and the lightning arrester 34 can be observed from the ground, inspection of the device is easy.

Moreover, this invention can also be implemented as follows.

(1) As shown in FIG. 8, attach the adapter 10 to the mounting bracket 9.
be attached to the bottom surface of the In this case, there is no need to form the bulge 10a in accordance with the shape of the connecting plate 5.

(2) In the above embodiment, as shown in FIG. 2, the present invention was applied to the tension insulator 17 on the right side, but it should also be applied to the tension insulator 17 on the left side. In this case, it becomes possible to quickly respond to abnormally high voltages caused by lightning strikes introduced from the left side.

Effects of the Invention As described in detail above, the present invention can be easily applied to existing tension insulators, making it possible to simplify the construction work and to ensure that the tension insulators are resistant to shaking due to wind pressure, etc. This prevents undue stress concentration on the tension insulators, tower body side coupling fittings, and lightning arrester insulators, improves the durability of the equipment, maintains a stable installation condition, and prevents rainwater and snow caps on the support arm side from moving to the lightning arrester. By eliminating this, the stain resistance of the lightning arrester can be improved, inspection work from the ground can be facilitated, and reliability can be improved.

Further, in the present invention, since the lightning arrester is suspended and fixed to the lower surface of the tip of the adapter, it is possible to eliminate bending load from acting on the lightning arrester.Furthermore, since the lightning arrester is located outside of the electric wire, the tower Compared to a device in which a lightning arrester is installed between the body and the electric wire, it is easier to secure a safe distance during work, and since the lightning arrester is not located directly under the upper phase electric wire, the upper phase electric wire This has the effect of preventing falling snow and rainwater from hitting the lightning arrester, suppressing staining of the lightning arrester, and stabilizing the discharge gap.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment embodying this invention;
Figure 2 is a plan view showing the entire device, and Figure 3 is A-A in Figure 2.
4 is an enlarged exploded perspective view of the vicinity of the support arm, FIG. 5 is an enlarged sectional view of the lower end of the lightning arrester, and FIG. 6 is a plan view of the rotating support tube provided in the middle of the arc horn. , FIG. 7 is a front view of the rotary support tube, FIG. 8 is a perspective view of another example of the adapter, and FIG. 9 is a front view of a conventional example. ■... Support arm, 9... Mounting bracket, 10... Adapter, 17... Tension resistant insulator, 26... Electric wire, 28...
... Mounting bracket, 29... Arc horn as a discharge electrode on the charging side, 34... Lightning arrester, 35... Support member, 36... Arc horn as a discharge electrode of the lightning arrester, 39. ...Support tube, 43...Rotation support tube, G...
discharge gap.

Claims (1)

[Claims] 1. A tension insulator (17) is connected to the support arm (1) of the tower body via a tower body side connection fitting, and an electric wire side connection fitting is connected to the tension insulator (17). An electric wire (26) is installed through the support arm (1), and an adapter (
10), and a lightning arrester (34) is suspended and fixed to the tip of the adapter (10), and the upper end of the lightning arrester (34) is placed above the tip of the support arm (1). position, and the electric wire side connecting fitting has a discharge electrode (29) on the charging side.
), and the discharge electrode (36) attached to the lower end of the lightning arrester (34) and the discharge electrode (29) on the energized side are opposed to each other with a predetermined aerial discharge gap (G). A lightning-resistant horn insulator device featuring: 2. The adapter (10) is fixed to the tip of the support arm (1) using a bolt (8) that fixes the mounting bracket (9) to the support arm (1). The lightning-resistant horn insulator device described in . 3. The lightning horn insulator device according to claim 1, wherein the discharge electrode (36) is attached to the lightning arrester (34) so that its position in the line direction can be adjusted. 4. The lightning horn insulator device according to claim 1, wherein the discharge electrode (36) is attached to the lightning arrester (34) so that its rotation angle in a horizontal direction can be adjusted. 5. The discharge electrode (36) is provided with a bendable rotary support tube (43) in its middle portion.
The lightning-resistant horn insulator device described in . 6. A patent claim in which the discharge electrode (36) faces discharge electrodes (29, 29) on the energized side of both left and right tension insulators (17, 17) connected to the tip of the support arm (1). The lightning horn insulator device according to item 1. 7. The lightning horn insulator device according to claim 1, wherein the discharge electrode (29) on the energizing side is balancedly supported by a weight (33) via a connecting fitting on the wire side.