JPH0254812A - Mounting adapter of lightning protection insulator - Google Patents

Abstract

PURPOSE:To permit to adjust an aerial discharge space between a discharging electrode on the electricity impression side and a discharging electrode on the grounding side, by fixing a movable adapter plate in such a manner as being tiltable in its upward and downward directions to a stationary adapter plate abutting on the under surface of the support arm of a steel tower. CONSTITUTION:A mounting adapter 10 is composed of a stationary adapter plate 16 fixed to the under surface of a support arm 1, a movable adapter plate 17 coupled to the stationary adapter plate 16 by a coupling pin 18 in such a manner that position of the movable adapter plate tilting in its upward and downward directions can be adjusted, and a clamping bolt 19 which clamps and fixes the adapter plates 16, 17 at a specified angle of inclination. In such a case that the under surface of the support arm 1 has warped from its horizontal condition, the height and position of a lightning protection insulator 11 are adjusted by adjusting the positions of the movable adapter plate 17 tilting in its upward and downward directions, so that an aerial discharge space (G) between a discharging electrode 7 on the electricity impression side and a discharging electrode 14 on the grounding side can be adjusted to a desired distance, so that the lightning protection characteristic of the insulator can be improved.

Description

[Detailed Description of the Invention] Industrial Field of Application] This invention is used for lightning arrester devices for power transmission lines. This relates to a mounting adapter for I-Raiko.

[Prior Art] In the conventional M lightning insulator device for power transmission lines, as shown in FIG. A power transmission line 6 is supported at the lower end of the chain via a lower hanging bracket 4 and a wire clamp 5, and a mounting adapter 31 is mounted horizontally at the tip of the support arm 1 in the same direction as the line. A lightning arrester 11 is suspended and fixed to the lower surface of the distal end of the mounting adapter 31. Further, a grounding side discharge electrode 14 is supported at the lower end of the lightning arrester 11, while a charging side discharge voltage l[! 7 is the discharge on the ground side.
It is supported so as to face the rIs pole 14 with a predetermined air gap G therebetween.

[Problem to be Solved by the Invention] [111 However, since the adapter 31 for attaching the lightning arrester was integrally formed in the shape of a flat plate, the upper hanging metal fitting 2 If the lower surface of the support arm 1 is warped (twisted) while it is fixed with the mounting bolts 15, the tip of the mounting adapter 31 will be displaced upward or downward, causing the lightning arrester 11 and the ground side supported by it to be released. t'@Koku 14 height! There was a problem that the air discharge gap G between the two discharge electrodes 7.14 could not be set constant.

An object of the present invention is to solve the drawbacks that exist in the above-mentioned prior art, and to make it possible to install the lightning arrester at the normal height even when the lower surface of the support arm of the steel tower is warped. Another object of the present invention is to provide an adapter for attaching a lightning arrester, which allows the air discharge gap between both discharge electrodes to be easily adjusted.

[Means for Solving Section U] In order to achieve the above object, the present invention provides a fixed adapter plate having transparent bolt insertion holes that abut the lower surface of a support arm of a steel tower, and a fixing adapter plate for the fixed adapter plate. The adapter includes a movable adapter plate supported by a connecting pin so as to be tiltable in the vertical direction, and a tightening means for tightening and fixing both the adapter plates.

[Function] By taking the above-mentioned means, the movable adapter plate is vertically tilted in position with respect to the fixed adapter plate, and is supported at the tip of the movable adapter plate *=
The height position of i * child is adjusted to the specified position 1, and the lightning protection is y
The discharge gap between the discharge electrode on the child side and the two discharge poles on the power transmission line side is maintained constant, improving lightning protection characteristics and not being affected by the existing conditions, improving applicability and making construction easier.

[Example] An example embodying the present invention will be described below with reference to FIGS. 1 to 3.

As shown in FIG. 2, a suspension insulator chain 3 formed by connecting suspension insulators in series is suspended from the support arm 1 of the steel tower via an upper suspension fitting 2, and the lower end of the WA main insulator chain 3 is suspended from the support arm 1 of the steel tower. A power transmission line 6 is installed through a lower hanging metal fitting 4 and a wire clamp 5. A horn-shaped charging side discharge electrode 7 for discharging lightning surge current is supported on the lower hanging metal fitting 4. Furthermore, arcing horns 8, 9 are attached to both the upper and lower hanging fittings 2.4 to prevent creeping flash of the suspended insulator chain 3.

On the other hand, at the tip of the support arm 1, a mounting adapter 10 according to the present invention is cantilevered in the track direction and in a horizontal state. @The metal fittings 12 are fixed with bolts. Also, avoid M! ! A ground-side discharge t4N+14, which faces the discharge electrode 7 with a predetermined air discharge gap G, is supported by the electrode fitting 13 on the critical side of the seventh element 11.

The mounting adapter 10 is interposed between the bottom surface of the tip of the support arm 1 and the upper hanging metal fitting 2, and is fixed with a tightening bolt 15.

To explain the configuration of the mounting adapter 10 with reference to FIG. 1, the fixed adapter plate 16 fixed to the lower surface of the support arm 1 by the tightening bolts 15 has 411 insertion holes 16a for the bolts 15. , and reinforcing side plates 16b are integrally bent on both sides. Furthermore, the side plates 17a of the first movable adapter plate 17 are connected to the side plates 16b so as to be tiltable in the vertical direction by connecting pins 18.
6.17 side plates 16b, 17a are formed with arc-shaped elongated holes 16c, 17c centered on the connecting pin 18, and both adapter plates 16.17 are formed in both elongated holes 16c, 17c.
A tightening bolt 19 as a tightening means for tightening and fixing is passed through.

Note that the fixed adapter plate 16 is provided with a support arm 1.
Notch 16d for guiding rainwater moving from the side downwards
is formed.

A pair of left and right brackets 20 are attached in parallel to each other on the top surface of the tip of the first movable adapter plate 17, and a pair of left and right brackets 22 integrally formed on the top surface of the second movable adapter plate 21 are attached to the brackets 20 with connecting pins. 23, they are connected to be rotatable in the vertical direction.

By bringing the base end of the second movable adapter plate 21 into contact with the bottom surface of the distal end of the first movable adapter plate 17, the second movable adapter plate 21 is held in a horizontal state. When the distal end portion receives an upward external force, the second movable adapter plate 21 is rotated upward around the connecting pin 23. Incidentally, a bolt insertion hole 21a for fixing the electrode fitting 12 of the lightning arrester 11 with a bolt is provided at the tip of the adapter plate 21.

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

Now, when an abnormal high voltage caused by a lightning strike is applied to the transmission T & wire 6, the current at this time is
The electricity is discharged in the air discharge gap G between the charging side and the grounding side [17 and 14], and then passes through the non-linear resistance element (as shown) built into the lightning protector 11 to the support arm of the steel tower. Flows to 1. Further, the following current that occurs thereafter is the above-mentioned aerial discharge gap G.
This is interrupted by a non-linear resistance element, preventing ground faults.

Now, in the embodiment described above, the mounting adapter 10 is attached to the fixed adapter plate 16 fixed to the lower surface of the support arm 1.
and connecting pin 18 to this fixed adapter grate 16.
A movable adapter plate 17 connected to the movable adapter plate 17 so as to be able to adjust its tilting position in the vertical direction, and both adapter plates 16
．． Since the first movable adapter plate 17 is configured with a tightening bolt 19 that is tightened and fixed at a predetermined angle of inclination, if the lower surface of the support arm 1 is warped from the horizontal state due to manufacturing or assembly errors, the first movable adapter plate By adjusting the tilting position of the lightning arrester 17 in the vertical direction, the height position of the lightning arrester 11 can be freely adjusted, and as a result, the air discharge of both discharge electrodes 7 and 14 can be maintained without being influenced by the existing conditions. Gap G
can be adjusted to a desired distance, improving lightning protection characteristics.

Further, in the embodiment described above, the second movable adapter plate 21 was supported so as to be rotatable upward from the horizontal position relative to the first movable adapter plate 17, but in this case, when the snow on the power transmission line 6 falls, Due to the reaction, the suspension insulator chain 3 hits the upper hanging bracket 4.
When the suspension insulator chain 3 collides with the lightning arrester 11 by being rotated counterclockwise in FIG. Therefore, damage to the lightning arrester 11 due to a collision of the suspension insulator chain 3 can be prevented.

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

As shown in FIG. 4, the fixed adapter plate 16
1 from the support arm 1 side by tilting the tip of the
To prevent moonwater from moving in the direction of the first movable adapter plate 17.

[2] As shown in Fig. 5, fixed adapter grade 16
The shape of the side plate 16b is made oblique.

[3] Directly to the first town moving adapter plate 17! f To support the thunder hook 11.

[4] Attach the fixed adapter plate directly to the arm.

[Effects of the Invention] As described in detail above, the present invention provides for adjusting the vertical inclination angle of the movable adapter plate when the lower surface of the tip of the support arm of a steel tower is displaced from a horizontal position to an inclined state due to manufacturing and assembly errors, etc. By adjusting the upper and lower mounting positions of the M lightning insulator, the gap between the 48 poles can be appropriately adjusted, which has the effect of making it easier to install the lightning arrester and improving the lightning protection characteristics. .

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the mounting adapter for *=i* child of the present invention, Fig. 2 is a front view showing the entire lightning arrester device for power transmission lines, and Fig. 3 shows the installation state of the fixed adapter plate. A cross-sectional view, FIG. 4 is a vertical cross-sectional view showing another example of the mounting adapter,
FIG. 5 is a cross-sectional view showing another example of the mounting adapter, and FIG. 6 is a front view of a conventional power transmission line support insulator device. 1...Support arm, 2...Upper hanging bracket, 3...
Suspension insulator chain, 4...Lower hanging metal fitting, 5...Electric wire clamp, 6...Power transmission line, 7...Electrical release electrode, 8.
9...Arching horn, lO...Mounting adapter,
11... Lightning arrester, 15... Tightening bolt, 16...
- Fixed adapter plate, 17... First movable adapter plate, 18... Connection pin, 19... Tightening bolt as tightening means, 21... Second movable adapter plate, 23... Connection Pin, G... air discharge gap. Patent applicant Nippon Insulator Co., Ltd. Agent Patent attorney On 1) Hironobu Figure 2

Claims (1)

[Claims] 1. Fixed adapter plate (1) with transparent bolt insertion holes (16a) that come into contact with the lower surface of the support arm (1) of the steel tower
6), a movable adapter plate (17) supported by a connecting pin (18) so as to be tiltable in the vertical direction with respect to the fixed adapter plate (16), and a tightening means (19) for tightening and fixing both the adapter plates. A lightning arrester mounting adapter characterized by comprising: