JPH02242537A - Lighting rod insulating apparatus - Google Patents

Abstract

PURPOSE:To make a discharge electrode light weight and decrease the weight of the whole apparatus by composing both discharge electrodes with a discharge part of a thin plate with almost semi-cylindrical or almost semi-circular shape and a supporting part to support the discharge part. CONSTITUTION:A discharge electrode 21 in a ground side is composed with a discharge part 21a formed with a long circular ring shape made of an almost semi-cylindrical thin plate and a supporting part 21b of an installation plate whose middle part is fixed by welding. A discharge electrode 23 in a loading side is composed with a discharge part 23a formed with a hair pin-like ring shape made of an almost cylindrical thin plate and a pair of installation parts 23b fixed in the both ends of the discharge part 23a by welding and a braket. The discharge part 21a and the discharge part 23a are placed while their semi- cylindrical parts face each other and keep a prescribed discharge gas between them. By this structure, sufficient strength of the discharge parts are obtained and the discharge electrodes are made light weight and thus the weight of the whole apparatus is made light.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a method for quickly grounding high voltage caused by lightning when it is applied to a power transmission line, and interrupting the follow-on arc that occurs afterwards. , which is installed in a lightning arrester device to prevent ground faults.

``Prior art'' In this type of conventional lightning arrester M, a power transmission line is supported on a support arm of a tower via a support insulator, a lightning arrester is supported at the tip of the support arm, and the power transmission line is In addition to connecting and supporting the discharge electrodes on the energized side, a grounding side discharge electrode is provided at the end of the lightning arrester, and the discharge parts of the energizing side discharge electrode and the grounding side discharge electrode are connected to round rods or hollow pipes, respectively. A structure has been proposed in which the discharge portions are formed by and facing each other with a predetermined aerial discharge gap.

In this conventional lightning arrester device, corona shields and electrolytic sweat-resistant clay caused by higher voltages were dealt with by increasing the diameter of the discharge part material, making it multiplexed, or making it ring-shaped. .

[Problem to be solved by the invention] However, when the material of the discharge part is made larger in diameter or multiplexed as in this conventional configuration, the discharge electrode becomes heavy, and especially when the discharge electrode has a cantilever support structure. If this is the case, the supporting part must have sufficient strength, and
Asymmetrical electrode′! In the case of the f4 construction, it is necessary to take measures to balance the left and right weights, and there is a problem in that the weight of the entire device also increases.

This invention was made by focusing on the problems existing in the conventional technology, and its purpose is to reduce the weight of the entire device by reducing the damage of the discharge electrode. However, if an unexpectedly large lightning current intrudes and a failure occurs, and a large fault current flows, the air discharge gap increases due to melting of the discharge part, improving insulation strength and reliability. As the number increases, if a failure does not occur,
It is an object of the present invention to provide a lightning arrester device that can prevent accidents by reliably blocking the follow-on current following the lightning current, etc., as in the prior art.

1. Means for Solving the Problem] In order to achieve the above object, in the present invention, a transmission line is supported on a support arm of a steel tower via support forceps, and a lightning protection booklet is attached to the tip of the support arm. In a lightning insulator device, a discharge electrode on a power supply side is connected and supported to the power transmission line, and a discharge electrode on a ground side is provided at an end of the lightning arrester. The discharge electrode is composed of a substantially semi-cylindrical or substantially semi-disc-shaped discharge section made of a thin plate, and a support section that supports the discharge section, and each discharge section is opposed to each other with a predetermined aerial discharge gap. 2 [Function] In the lightning arrester device of the present invention configured as described in Paragraph 17, both discharge electrodes or a substantially semicylindrical or substantially semicircular discharge portion made of a thin plate and the Since it consists of a support part that supports the discharge part, the discharge area can be increased without increasing the diameter of the discharge part, and potential concentration can be reduced to improve withstand voltage.
- etc. can be achieved. Moreover, with the above structure, the section modulus of the discharge part becomes large relative to its own weight, and sufficient strength of the discharge part can be ensured, and the weight of the discharge electrode can be reduced.
The weight of the entire device can be reduced. Furthermore, in the event that an unexpectedly large lightning current or the like enters and a failure occurs and a large fault current flows, the air discharge gap increases due to melting of the discharge part, improving insulation strength and reliability. When a failure does not occur, it is possible to reliably cut off the follow-on current following this lightning current, etc., to prevent an accident, as in the conventional case.

[Example] Hereinafter, a first practical example of a lightning arrester device embodying the present invention will be described in detail based on FIGS. 1 to 5.

As shown in FIG. 1, a hanging metal fitting 2 is attached to a support arm 1 of a steel tower, and a horn mounting metal fitting 4 is connected to this hanging metal fitting 2 via a U clevis 3. A support insulator 5 is suspended from the horn mounting bracket 4 so as to be swingable in the direction of the railway line and in a direction perpendicular thereto. There is.

A horn mounting bracket 7 is connected to the lower end of the support insulator 5.
A wire clamp 10 for supporting a power transmission line 9 via a connecting link 8 is attached to this horn mounting bracket 7.A wire clamp 10 for supporting a power transmission line 9 via a connecting link 8 is attached to both bone mounting brackets 117. This arcing horn 11
．． 12, the damage caused by creeping flash of the J element 5 during an abnormal lightning strike is reduced.

A mounting adapter 14 is fixed in a cantilever manner to the tip of the support arm 1, and extends in the same direction as the track direction. A pair of lightning arresters 15 are suspended and fixed to the lower surface of the tip of the adapter 14 in a series-connected state. Each lightning protection booklet 1
5 is a cylindrical pressure-resistant insulating cylinder (shown in the diagram) made of a tensile material such as PR, P, etc., and a voltage-current tube whose main material is zinc oxide (ZnO) housed in series inside the cylinder. Current-limiting element (path shown) with characteristic or non-linearity and voltage-resistant insulating cylinder'-1
It consists of cap-shaped grounding side and energizing side electrode fittings 1.6.17 which are fitted and fixed at both ends, and molded rubber 18 which is installed around the outer periphery of the voltage-resistant insulating tube.

Arcing rings 19.20 are provided on the electrode fittings 16.17 of each of the lightning arresters 115 to face each other, and the molded rubber 1
8. Damage caused by creeping flash is reduced. A grounding side discharge electrode 21 is attached to the power supply side electrode fitting 17 at the lower end of the F lightning arrester 15. As shown in FIG. 2, the ground-side discharge electrode 21 consists of a discharge section 21a formed into an oval ring shape made of a substantially semi-cylindrical material made of a thin plate, and a mounting plate welded and fixed to the intermediate section thereof. The supporting portion 21b is composed of a supporting portion 21b.

The power supply side pawn mounting bracket 7 has a discharge electrode 2 on the power supply side.
3 is supported via a support plate 24.

As shown in FIGS. 2 to 4, this discharge electrode 2 on the energized side
Reference numeral 3 denotes a discharging portion 23a formed in a hairpin link shape from a substantially semi-cylindrical material made of a thin plate, a pair of mounting portions 23b consisting of mounting rods welded to both ends of the discharging portion 23a, and a tip of each mounting portion 23b. The brackets 1 to 25 are welded and fixed to the support plate 24, and both brackets 25 are rotatably attached to the support plate 24 by pins 26. As shown in FIG. 1, the discharge section 21,a of the discharge tI#:121 on the ground side and the discharge section 23a of the discharge electrode 23 on the energized side.
, with their semi-cylindrical parts facing each other,
They are arranged with a predetermined air discharge gap G.

As shown in FIG. 5, bent portions 24a are provided at both ends of the support plate 24, and the adjusting bolts 24a are provided on the bent portions 24a.
7 are screwed together. By adjusting the rotation of the adjustment bolt 27 and fixing it with the fixing nut 28, the discharge electrode 23 on the energizing side is rotated to a predetermined position, and the aerial discharge gap G is adjusted and set to a predetermined value. It is now possible to do so.

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

Now, in this lightning arrester device, when a surge current caused by a lightning strike is applied to the power transmission line 9, the current flows from the wire clamp 10 to the horn mounting bracket 7 on the power supply side, and the electric current [23, 21 A discharge occurs in the air discharge gap G between the discharge parts 23a and 21a, and furthermore, the electrode fitting 17, the current-limiting element of the lower lightning arrester hook 15, the electrode fitting 16.17, and the lightning arrester 1.
It flows through the current limiting element 5, the electrode fitting 16 and the mounting adapter 4 to the support arm 1 of the steel tower, and is discharged from the tower to the ground. Further, the following current generated after that is caused by the discharge electrode 23.
The discharge portions 23a, 2] of 21 are suppressed and interrupted by the air discharge gap G between them and the current limiting elements in both the lightning arresters 15.

Furthermore, if this lightning arrester device is damaged by a lightning strike that exceeds expectations and a large fault current of 10 to 50 KA intrudes, the discharge electrode 2 on the energizing side and the grounding side
3.21 discharge part 23a21a is fused and both discharge parts 2
The air discharge gap G between 3a and 2Ia increases. Therefore,
Due to this increase in the air discharge gap G, the insulation strength is greatly improved, and the reliability after a failure can be further improved.

Now, in this embodiment, the discharge electrodes 23.21 on the energizing side and the grounding side have substantially semicylindrical discharge parts 23a, 21a made of thin plates, and a support part 23b that supports the discharge parts 23a, 21a. 21b, it is possible to secure a sufficient discharge area without increasing the diameter of both discharge portions 23b and 21b, and it is possible to improve the withstand voltage. Further, due to the above configuration, the section modulus of the discharge parts 23a, 21a becomes larger than their own weight, so that the discharge parts 23a, 21
The strength of the discharge electrode 23.2 can be ensured sufficiently.
] It is possible to reduce the weight of the entire device. Here, the supporting parts 23b and 21b are the discharge part 23a.
, 21. It also has the function of fixing the direction of the arc jet when a is melted in a direction that will not cause problems to the equipment.

(Another Embodiment) Next, another embodiment of the present invention will be sequentially described with reference to the drawings from FIG. 6 onwards.

First, the second embodiment of the present invention shown in FIGS. 6 and 7 will be described.
This embodiment is different from the first embodiment in that one lightning arrester 15 is attached to the lower surface of the tip of the lightning arrester 4 and in the shape and configuration of the discharge units IU 23, 21 on the first section @ side and the ground side.

That is, in this embodiment, the discharge electrode 21 on the ground side is
A support part 21 consisting of a bone-shaped discharge part 21a made of a substantially semi-cylindrical material made of thin plate, and a mounting rod fixed by welding to the base end of the discharge part 21a. It is composed of b. The energizing side discharge electrode 23 is also composed of a horn-shaped discharge part 23a made of a substantially semi-cylindrical material made of a thin plate, and a support part 23b made of a mounting rod welded to the base end of the discharge part 23a. ing. And the discharge part 23 of both discharge electrodes 23.21
A, 21a are formed with a large number of small holes 29 for draining water. A net-like material may be used without making small holes industrially.

Therefore, in this second embodiment as well, the discharge portions 23a and 2 of both discharge electrodes 23.21 are similar to the first embodiment described above.
Since it is formed into an almost semicircular node shape by 1a or a thin plate,
A sufficient discharge area can be secured without increasing the diameter of the discharge parts 23a, 21a, and the withstand voltage can be improved, and the section modulus of the discharge parts 23a, 21a can be increased relative to their own weight. The discharge portions 23a, 21. A sufficient strength can be ensured, and the weight of the discharge electrodes 23 and 21 can be reduced, thereby reducing the size of the entire device.

In addition, since the discharge portions 23a21a of both discharge electrodes 23.21 have a structure, if a failure occurs due to a lightning strike larger than expected and a fault current enters, the discharge portions 23a21a of both discharge electrodes 23.21 will be damaged.
2], the discharge portion 23a21a is fused and the air discharge gap G is created.
The dielectric strength can be greatly improved and the reliability after a failure can be further improved.

Next, a third embodiment of the present invention shown in FIGS. 8 to 10 will be described. As shown in FIG. 8, a mounting plate 31 is fixed to the support arm 1 of the steel tower with bolts 32. Tension-resistant support insulators 5 are connected and supported at both left and right ends of the mounting plate 31 via tower-side connecting fittings 33, and each support insulator 50 is connected and supported at the energized side end via electric wire-side connecting fittings 34. A power transmission line 9 is installed and supported. Steel tower side and electric wire 11
The arcing horn 11 is attached to the connection fittings 33 and 34 of 11.
12 are provided so as to face each other. A pair of jumper wires 35 are connected and fixed at both ends of the two electric wire side connecting fittings 34, and extend in an arc shape between the two electric wire side connecting fittings 34.

A pair of lightning arrester insulators 15 are suspended and fixed to the tip of the support arm 1 in a series-connected state.

It should be noted that each lightning arrester 15 is constructed in the same manner as in the first embodiment described above, so the same reference numerals are given and the description thereof will be omitted.

A bracket 36 is fixed to the electrode fitting 17 on the power supply side at the lower end of the lower lightning arrester 15, and a discharge electrode 21 on the ground side is attached to the bracket 36. Similar to the first embodiment shown in FIG. 2, this ground-side discharge electrode 21 includes a discharge section 2 which is formed into an oval link shape from a substantially semi-cylindrical material made of a thin plate, and an intermediate section thereof. The support portion 21b is made of a mounting plate welded to and fixed to the support portion 21b.

As shown in FIGS. 8 to 10, a support plate 39 or a clamp 40 is installed between the jumper wires 5 below the lightning arrester 15, and a threaded rod 41 is provided at the center of the upper surface. It is erected. A discharge electrode 23 on the power supply side is attached to the upper end of the threaded rod 41 so that its vertical position can be adjusted by an adjustment knob 1-42. The discharge electrode 23 on the energizing side includes a discharge part 23a formed of a substantially semi-cylindrical thin plate material with a side surface shaped like a horseshoe ring, and a threaded rod welded to the middle bottom of the discharge part 23a. Support part 23b
It is composed of. Also, a small hole 29 for draining water is formed in the discharge portion 23a of the intelligence side discharge power @23.

As shown in FIG. 8, the discharge electrode 2 on the ground side
1 discharge part 21a and discharge part 2 of the discharge electrode 23 on the power supply side.
3a are arranged opposite to each other with a predetermined air discharge gap G, and by adjusting the height position of the discharge electrode 23 on the energizing side, the cap length of this air discharge gap G can be arbitrarily set. 2 Now, in the lightning arrester device of this embodiment configured as described above, if an abnormally high voltage due to a lightning strike is now applied to the feed line 9, the current at this time will be applied to the jumper wire 35. It reaches the discharge electrode 23 on the charging side, and is discharged in the air discharge gap G between the discharge electrode 23 and the discharge electrode 21 on the grounding side. It flows through the support arm 1 of the steel tower and is grounded. Then, the subsequent arc generated thereafter is suppressed and blocked by the air discharge gap G and the current limiting rope.

7. Also in this third embodiment, as in the first and second embodiments, the discharge portions 23a, 21a of the Ryosu Denden 4Fi 23゜21 are formed of thin plates into a substantially semi-cylindrical shape. Therefore, a sufficient discharge area can be secured without increasing the diameter of the discharge parts 23a, 21, a, and the withstand voltage can be improved.
The section modulus of 1a becomes large relative to its own weight, and the strength of both discharge parts 23a and 21a can be ensured sufficiently, and the weight of the discharge electrodes 23 and 21 can be reduced, thereby reducing the weight of the entire device.

Further, the discharge portions 23a, 21, a of both discharge electrodes 23.21
Because of the structure, if a failure occurs due to an unexpectedly large lightning strike and an accidental current intrudes, both discharge electric camellias 2
3.21 discharge portion 23a21a is broken, the air discharge gap G is increased, the insulation strength is greatly improved, and the reliability after failure can be further improved.

Next, a fourth embodiment shown in FIGS. 11 to 15 will be described. In this embodiment, a shield ring 45 and a horn mounting bracket 7 are attached to the lower part of the support hook 5 made of a long needle support insulator. Clamp plate 4 at the bottom
A clamp 47 for the jumper wire 35 is attached via 6.

Further, as shown in FIGS. 13 and 14, the ground side discharge part @121 of this embodiment is a discharge part 21. which is formed in a circular ring shape from a substantially semi-cylindrical material made of a thin plate. a and
Support part 21 consisting of a mounting plate welded and fixed to the intermediate part
It is composed of b.

This support portion 21. A pole is inserted into the lower bracket 49 of the lightning arrester 15 through the elongated hole 48 provided in b.
50, the discharge electrode 21 on the ground side is fixed so that its position can be adjusted, so that the gap length of the air discharge gap G can be arbitrarily set.

Furthermore, as shown in FIG. 15, the discharge electrode 23 on the energizing side of this embodiment is fixed by welding to a discharge part 23a formed in a circular ring shape from a substantially semi-cylindrical thin plate material and an intermediate part thereof. The support part 23b is made of a mounting plate. The support bolt 51 passing through the support portion 23b allows the discharge @fi+ 23 on the power supply side to be rotatably supported by the horn mounting bracket 7, and the arc-shaped elongated hole 52 provided in the support portion 23b is Via horn mounting bracket 7
By screwing together the fixing bolt 53, the discharge electrode 23 on the energizing side is fixed at a predetermined rotational position. Therefore, in this fourth embodiment as well, the above-mentioned first
It is possible to expect the same effects as in the embodiments to the third embodiment.

Next, a fifth embodiment shown in FIGS. 16 and 18 will be described. In this embodiment, a pawn fitting 7 is provided at the lower end of the support hook 5, as in the first embodiment, A clamp fitting 54 for clamping the jumper wire 35 is attached to the lower part thereof.

In this example of a real can, either the discharge 'electrode 21 on the ground side or the discharge part 21 formed in the shape of an approximately elliptical disk by a thin plate is used.
a, and a support portion 21b consisting of a mounting plate fixed by welding to the central portion of the support portion 21b. Further, the discharge electrode 23 on the energizing side is composed of a discharge part 23a formed of a thin plate into a substantially horseshoe-shaped disc shape, and a pair of support parts 23b made of a mounting rod fixed by welding to the base end of the discharge part 23a. There is. Therefore,
In this fifth embodiment as well, the above-mentioned first to fourth embodiments
The same effects as in the examples can be expected.

It should be noted that the present invention is not limited to the configurations of the above-mentioned embodiments, but can be modified and embodied as follows.

(]) As shown in FIG. 19, in the energizing side discharge electrode 23 of the first embodiment, the discharge part 23a is formed to have a narrow width on the base end side, so that the - layer is lightweight. to aim for

(2) As shown in FIG.
a, 23a have a structure in which two semi-cylindrical materials made of thin plates are connected by a connecting member 55.

(3) As shown in FIG. 21, in the discharge electrodes 21 and 23 on the ground side and the energized side of the fourth embodiment, the discharge section 2]
a, 23a have a structure in which two semi-cylindrical materials made of thin plates are connected by a connecting member 56.

(4) In each of the first to fifth embodiments, the discharge electrode 2
1. Execute by replacing the shape configuration of 23 with each other.

(5) As shown in FIG. 22, the discharge electrode 2 on the ground side
1 and the discharge electrode 23 on the energized side, a pair of upper and lower arc-shaped discharge parts 21a and 23a, and a support part 21b connecting them,
23b.

[Effects of the Invention] Since this invention is configured as described above,
Provide sufficient strength to the discharge section! Although it is possible to maintain V, it is possible to reduce the weight of the discharge electrode and reduce the damage to the entire device.Moreover, it is possible to prevent failures and accidents due to unexpectedly large lightning strikes. Even when a current or the like intrudes, the insulation strength can be improved as the air discharge gap increases due to the melting of the discharge part, which has the excellent effect of increasing insulation reliability.

[Brief explanation of drawings]

Fig. 1 is a front view showing an eleventh embodiment of a lightning arrester glass device embodying the present invention, Fig. 2 is an exploded perspective view showing an enlarged discharge electrode on the energizing side and the grounding side, and Fig. 3 is A in Figure 2
- An enlarged cross-sectional view taken along the A line; Figure 4 is a plan view showing an enlarged view of the discharge electrode and arching point on the power supply side; and Figure 5 is an enlarged view of the mounting configuration of the discharge electrode on the power supply side. FIG. FIG. 6 is a top view showing a second embodiment of the M-light stone discharge device of the present invention, and FIG. 7 is an exploded perspective view showing an enlarged discharge electrode on the energizing side and the grounding side. FIG. 8 is a front view showing a third embodiment of the lightning protection glass device of the present invention, and FIG.
FIG. 10 is a sectional view taken along the line B--B in FIG. 9. FIG. 11 is a partial front view showing a fourth embodiment of the lightning protection glass device of the present invention, FIG. 12 is a bottom view of the supporting insulator portion, and FIG.
Figure 3 is a partial front view showing an enlarged view of the discharge electrode on the ground side, Figure 14 is a sectional view taken along line C-C in Figure 13, and Figure 15 is
The figure is a partial front view showing an enlarged view of the discharge electrode on the power supply side. FIG. 16 is a partial front view showing a fifth embodiment of the lightning protection glass device of the present invention, and FIG. 17 is a bottom view of the supporting insulator portion thereof.
FIG. 18 is an exploded perspective view showing an enlarged discharge electrode on the power supply side and the ground side. FIG. 19 is a plan view showing another embodiment of the discharge electrode on the energizing side in the first embodiment, FIG. 20 is a sectional view showing another embodiment of the discharge electrode in the second embodiment, and FIG. Cross-sectional view showing another example of the discharge electrode in the fourth example, No. 22
The figure is a perspective view showing another example of the discharge electrode. DESCRIPTION OF SYMBOLS 1... Support arm, 5... Support weak element, 9... Power transmission line, 15... Lightning arrester, 21... Ground side discharge electrode, 21a... Discharge part, 21b... Support part, 23...
・Discharge electrode on the energized side, 23a...discharge part, 23b...
・Support part, G...Air discharge gap. Patent applicant Nippon Yokoko Co., Ltd. Agent
Patent attorney On 1) Hiroyoshi (and 1 other person) Figure 9■ To'

Claims (1)

[Claims] 1. A power transmission line (9) is supported on a support arm (1) of a steel tower via a support insulator (5), and a lightning arrester (15) is attached to the tip of the support arm (1). In the lightning arrester device, the lightning arrester device is configured to connect and support a discharge electrode (23) on the power supply side to the power transmission line (9), and provide a discharge electrode (21) on the ground side at the end of the lightning arrester (15). , the discharge electrode (23) on the energized side and the discharge electrode (23) on the ground side (
21), an approximately semi-cylindrical or approximately semi-disc-shaped discharge section (23a, 21a) made of a thin plate, and a support section (23b, 21b) that supports the discharge section (23a, 21a).
), and each discharge part (23a, 21a) is made to face each other with a predetermined aerial discharge gap (G).