JPH0576725B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a pole mounting structure for a lightning arrester insulator device for overhead power transmission lines, and more specifically, the present invention relates to a pole mounting structure for a lightning arrester insulator device for overhead power transmission lines, and more specifically, a power transmission line suspension insulator is provided on both left and right sides, and a structure is provided between the two suspension insulators. This invention relates to a pole mounting structure for a lightning arrester device for an overhead power transmission line equipped with a lightning arrester.

(Conventional technology) Generally, overhead power transmission lines are installed on steel towers to quickly discharge abnormally high voltage caused by lightning strikes to the ground using lightning protection insulators to prevent ground faults and improve system reliability. A lightning arrester device is used.
As this conventional example, as shown in Fig. 7, a steel tower 1
A suspended insulator 86 is suspended via an insulator mounting bracket 85, and the electric wire 30 is supported at the lower end of the suspended insulator 86 via a clamp 87. The lightning arrester 90 is cantilever-supported diagonally through the lightning arrester 90, and an arcing horn 91 is fixed to the lower end of the lightning arrester 90, and an arcing horn 93 is fixed to the cap metal fitting 92 at the lower end of the suspension insulator 86. It was the one that faced the two.

On the other hand, conventionally, as shown in FIG. 8, a suspension insulator 86 is suspended from the tip of the steel tower 1, and a lightning arrester 94 is placed directly between the tower 1 and the electric wire 30 supported at the lower end of the suspension insulator 86. The system is constructed diagonally and has no air gap.
In other words, there was a type similar to lightning arresters at power generation and substations.

(Problem to be Solved by the Invention) However, in the former conventional device shown in FIG. Therefore, it was difficult to maintain a stable shape during erection, and installation work was time-consuming.

In a lightning arrester device with such a configuration, if the lightning arrester element has a low discharge withstand capacity, a low level of pollution resistance, and the lightning arrester is relatively smaller and lighter than the suspended insulator, it may be installed directly to the suspended insulator. The influence of a single lightning arrester on the behavior of the entire insulator device was negligible. However, as the scope of application has expanded and lightning arrester insulators have become larger due to increased discharge withstand capacity, implementation of safety measures, and demands for improved antifouling properties, the drawbacks of this pole mounting method have become impossible to ignore.

In other words, there is insufficient clearance due to static balance when there is no wind, or abnormal vibrations when the track oscillates in the direction of the track or at right angles under strong winds, and suspension insulators 8
Due to the bending load due to the lightning arrester's own weight and the inertial force due to vibrations being applied to the cap fittings 88 and support fittings 89 of No. 6, the strength is insufficient, and in order to ensure the insulation strength and air gap length of the lightning arrester, the lightning arrester must be placed horizontally. For example, the width under the line can be expanded by installing it in a close position.

In addition, the latter conventional device shown in Fig. 8, when there is no wind,
When there is no vibration, the load shared by the lightning arrester is only its own weight, but when the wire is vibrating due to strong winds, falling ice or snow, etc., the lightning arrester will bear most of the horizontal load generated on the wire. Lightning arrester insulators are required to have the same strength and reliability as suspension insulators, and this has resulted in the problem of increased size and weight.

The tower arms also needed to have a special structure to withstand this load. Furthermore, since the wire is supported at two points by a hanging insulator and a lightning arrester, and the vertical load is shared with the horizontal load, special clamps are required, resulting in a complicated structure that reduces reliability and price. There was a problem on the front.

The first object of the present invention is to solve the above-mentioned problems, increase the stability of the entire device, reduce the clearance, and make it more compact. We have developed a pole mounting structure for lightning arrester devices for overhead power transmission lines that can significantly reduce the repetitive bending load that acts on the lightning arrester even when shaken, and further improve reliability by preventing collisions between the suspension insulator and the lightning arrester. It is about providing.

In addition to the first object, the second object of the present invention is to significantly reduce the repetitive bending load that acts on the lightning arrester even when the power transmission line swings in the direction of the line, thereby preventing the occurrence of unbalanced loads on the suspended insulators. An object of the present invention is to provide a pole mounting structure for a lightning arrester device for an overhead power transmission line, which can prevent the above problems and further improve reliability.

Structure of the Invention (Means for Solving the Problems) In order to achieve the first object, the first invention provides a method of connecting a connecting yoke to a steel tower via a hanging metal fitting in the direction of the transmission line and in the same orthogonal direction. At the same time, the upper ends of the pair of left and right suspended insulators are connected to both ends of the connecting yoke so as to be rotatable in a direction perpendicular to the track direction, and the lower ends of both suspended insulators are connected rotatably in a direction perpendicular to the track direction. A spacing member is installed between the parts, a power transmission line is supported at the lower part of the spacing member, and the upper and lower parts of the lightning arrester are connected between the connecting yoke and the spacing member by connecting pins, etc. The connecting yoke, suspension insulator, spacing member, and lightning arrester are each connected at one point, and the connecting yoke, suspension insulator, spacing member, and lightning arrester are arranged symmetrically with respect to a perpendicular line passing through the center of rotation of the connecting yoke; The connecting yoke is rotatably connected to the connecting yoke in a direction substantially perpendicular to the line direction of the power transmission line using a connecting pin or the like.

Furthermore, in order to achieve the second object of the second invention, in addition to the means of the first invention, the upper ends of the pair of left and right suspension insulators are attached to both ends of the connection yoke by connecting pins or the like in the line direction and in the same direction. The lightning arrester is connected rotatably in the orthogonal direction, and the connecting metal part on the upper part of the lightning arrester is connected to the connecting yoke so as to be rotatable in the direction of the power transmission line.

(Function) In the first invention, since the entire lightning arrester device is symmetrical with respect to a perpendicular line passing through the center of rotation of the connecting yoke,
Not only is the entire device stabilized, but if one of the two suspension insulators breaks off, the separated suspension insulator may collide with the lightning arrester, but the lightning arrester will connect the insulator. Since the yoke and the spacing member are connected, the shock caused by the collision is small and damage to the lightning arrester is prevented. As a result, the disconnected suspended insulator does not collide with a normal suspended insulator, and therefore, the normal suspended insulator is prevented from breaking off, and the power transmission line is prevented from falling to the ground.

In addition, even if the connecting yoke, both suspension insulators, spacing members, and lightning arrester insulator swing in a direction perpendicular to the line direction of the power transmission line around the upper suspension point due to wind pressure, etc., the upper end connecting part of the lightning arrester insulator will not touch the connecting yoke. On the other hand, since it can be rotated in the direction perpendicular to the line by means of a connecting pin, etc., the repetitive bending load acting on the lightning arrester is significantly reduced.

Since the lightning arrester is supported at both ends, collision between the lightning arrester and the suspended insulator is prevented.

In addition to the effects of the first invention, the second invention is such that the upper end connecting portion of the lightning arrester is rotatably connected to the connecting yoke by a connecting pin or the like in the direction of the power transmission line, so that the connecting yoke is protected against wind pressure, etc. Even if the suspension insulators, the spacing member, and the lightning arrester insulator swing in the direction of the transmission line, no repetitive bending load is applied to the lightning arrester. Furthermore, since both the upper and lower ends of the lightning arrester are supported on a perpendicular line passing through the center of rotation of the suspension point of the connection yoke, an unbalanced load on the suspended insulator does not occur.

When the insulator device swings in the direction of the railway track or in a direction perpendicular to the same in a strong wind, the relative position of the connecting yoke and the spacing member may change. Even under this condition, since both ends of the lightning arrester are connected at one point, excessive stress concentration does not occur in the lightning arrester.

(Example) Hereinafter, an example embodying the present invention is shown in Figs.
This will be explained based on FIG.

As shown in FIG. 2, a hanging metal fitting 2 having a substantially U-shaped front is fixed to the steel tower 1 with bolts 3.
Another hanging bracket 4 having an approximately inverted U-shape on the side is hung on the hanging bracket 2 so as to be rotatable in the left-right (track) direction and the front-back (orthogonal to the track direction) direction. A connecting yoke 6 is suspended between the lower ends of the connecting pins 5 so as to be rotatable in the left-right direction.

The lightning arrester device for an overhead power transmission line of this embodiment is schematically comprised of a pair of suspension insulators 7, 7, which are supported at both left and right ends of the connection yoke 6 and are formed in the same structure as suspension insulators. A spacing rod 22 as a spacing member installed between the lower ends of the suspension insulator chains 7, 7, and a lightning arrester 36 connected between the center of the connection yoke 6 and the center of the spacing rod 22. and a pair of left and right clamps 28, 28 for supporting the power transmission line 30 at two points at both ends of the spacing rod 22. A reinforcing rib 22a is provided on the lower side of the spacing rod 22 over substantially the entire length thereof, as shown in FIG. 5a. Instead of this reinforcing rib 22a, reinforcing ribs 22b to 22c of various shapes may be attached as shown in b to f of the same figure.

Next, the double-suspended insulator chains 7, 7 will be explained. A first connecting link 9 is connected to both left and right ends of the connecting yoke 6 by connecting pins 8 so as to be rotatable in the left-right direction. is connecting pin 1
0, the second connecting link 11 is connected so as to be rotatable in the front-back direction. Also, the second connecting link 11
A third connecting link 13 is connected to the connecting pin 12 so as to be rotatable in the left-right direction. Furthermore, the upper end of a suspension insulator chain 15 configured by connecting a large number of suspension insulators in series is connected to the lower end of the third connecting link 13 via a connecting pin 14 so as to be rotatable in the left-right direction. . A fourth connecting link 16 is connected to the lower end of the insulator chain 15 so as to be rotatable in the left-right direction, and a connecting plate 18 is connected to the link 16 so as to be rotatable in the left-right direction by a connecting pin 17. The plate 18 and the third connecting link 13 are provided with arcing horns 19 and 20 on the energizing side and the grounding side.
is fixed in a cantilever manner by bolts 21.

A spacing rod 22 is installed by a connecting pin 23 between a pair of connecting plates 18, 18 located at the lower ends of both suspended insulator chains 7, 7.

As is clear from FIG. 2, the two suspended insulator chains 7, 7 are installed in a substantially inverted V-shape as a whole.
Further, the connecting yoke 6, both suspension insulator chains 7, 7, and the spacing rod 22 are formed symmetrically with respect to the perpendicular line H--H passing through the connecting pin 5, and are generally formed in a generally trapezoidal shape.

A fifth connecting link 26 is connected to the pair of connecting plates 18, 18 so as to be rotatable in the left-right direction by a connecting pin 27, and clamps 28, 28 are connected to both links 26, 26, respectively, by connecting pins 29, 29. movably connected, both clamps 28, 28
The power transmission line 30 is gripped at two places. Note that the power transmission line 30 is equipped with an armor rod 31,
31 is covered, and the clamp 28 and the power transmission line 30 are fastened with a nut 32 so that they cannot move relative to each other.

A connecting link 33 is connected and suspended from the center of the connecting yoke 6 by a pin 34 so as to be rotatable in the left-right direction, and a supporting metal fitting 40 is attached to the lower end of the connecting link 33 as a connecting metal part by a pin 35. They are rotatably connected, and a hanging lug 49 (to be described later), which is provided at the upper end of the lightning arrester 36 and will be described later as a connecting metal part, is suspended from the support metal fitting by a pin 35 so as to be rotatable in the front-rear direction. This lightning arrester 36 is located on the perpendicular line H--H passing through the connecting pin 5.

On the other hand, a mounting plate 37 is fixed upwardly to the upper center of the spacing holding rod 22.
A connecting link 38 is connected to the center portion of the connecting link 38 by a pin 39 so as to be rotatable in the left and right direction.
8 and a hanging ear 49 (described later) provided at the lower end of the lightning arrester 36.
A support fitting 40 is connected by a pin 41 so as to be rotatable in the front-back and left-right directions, and is loosely connected so that no tension is applied at all times. The connecting link 38 has a through hole 38a that engages the pin 41.
A plurality of are provided vertically to form a vertical length adjustment mechanism. And the suspension insulator series 7,7
The dimensional tolerance between the lightning arrester 36 and the lightning arrester 36 is accommodated. Further, the mounting plate 37 and the later-described pressure relief path forming cover 58 of the lightning arrester 36 are electrically connected by a lead wire 42 for noise prevention. The upper end of this lead wire 42 is welded to the pressure relief path forming cover 58, and the metal fitting 43 at the lower end is fastened to the mounting plate 37 with bolts 44.

Next, the structure of the lightning arrester 36 will be explained with reference to FIGS. 3 and 4.

Cylindrical flange fittings 46 and 47 are fitted and fixed to the upper and lower outer circumferential surfaces of the porcelain insulator tube 45 by cementing 48. Hanging ears 49, 49 connected to the connecting links 33, 40 by pins 35, 41 are integrally formed on the outer peripheral surfaces of both the upper and lower flange fittings 46, 47 at 180 degrees from each other.

On the end faces of the insulator pipe 45 and the flange fittings 46, 47, there are a plurality of terminal plates 50, 51 (eight in this embodiment, but only one is shown) bolts 5.
It is fixed by 2. Seal members 5 are provided between the end faces of the insulator tube 45 and the terminal plates 50 and 51, respectively.
3,53 are interposed.

The terminal plates 50, 51 are provided with pressure relief passages 50a, 51a which communicate the space inside the insulator tube 45 with the atmosphere. Then, rupture discs 54, 54 are brought into contact with the end surfaces of the terminal plates 50, 51 so as to cover the pressure relief passages 50a, 51a.
Pressing rings 55, 55 are brought into contact with the surfaces of and fixed by the bolts 52. Terminal board 5
Between the end faces of 0 and 51 and the rupture discs 54 and 54,
Seal members 56 and 57 are respectively interposed concentrically at two locations, and thus the space within the insulator tube 45 is maintained in a sealed state.

Opening edges of pressure relief path forming covers 58, 58 are brought into contact with the end surfaces of the terminal plates 50, 51 so as to surround the outer peripheries of the pressing rings 55, 55, respectively, and the covers 58, 58 are fitted with a plurality of bolts. 59 to the terminal plates 50 and 51. Pressure relief ports 58a, 58a are formed on the outside of the covers 58, 58 so as to be inclined toward each other and correspond to each other. The pressure relief ports 58a, 58a are oriented in the left-right direction, that is, in a direction perpendicular to the line direction of the power transmission line 30, and in a direction opposite to the steel tower 1.

On the other hand, arcing ring arms 60a, 60a are attached to the outer circumferential surfaces of the plunge fittings 46, 47, as shown in FIGS. Annular arcing rings 60, 60 are horizontally supported in a cantilever manner, and a portion thereof is connected to the pressure relief port 5 as shown in FIG.
Notches are made at positions corresponding to 8a and 58a.

Next, to explain the internal lightning protection structure of the insulator tube 45, a tension-resistant insulating tube 61 made of a material such as reinforced plastic (FRP) with excellent mechanical strength is housed inside the insulator tube 45, and both upper and lower ends of the insulating tube 61 are The inner flange fittings 62, 62 are attached with adhesive 6 on the outer periphery.
3, they are fitted and fixed airtightly.

Attachment tubes 64, 65 are interposed between the end faces of both flange fittings 62, 62 and the terminal plates 50, 51, and are fixed with a plurality of bolts 66, 67. Then, attach the upper mounting tube 64 to the bolt 66.
is tightened and fixed to the terminal plate 50, and the tension-resistant insulating tube 61 is suspended and held in a predetermined position.

On the other hand, pressure relief passages 62a, 62a are transparently provided in the cover portions of the flange fittings 62, 62, and
a, 62a, the flange fitting 6
2, 62 and the mounting tubes 64, 65, rupture discs 68, 68 are interposed. Flange fitting 6
2, 62 and the rupture disc 68, 68 and the rupture disc 6
Seal members 69 and 69 are interposed between the mounting tubes 8 and 68 and the mounting tubes 64 and 65, respectively. Further, a sealing member 70 is also provided between the terminal plate 50 and the mounting tube 64.
is mediated.

An engagement recess 6 is provided on the lower end surface of the lower mounting tube 65.
5a is formed, and an engagement protrusion 51b protruding from the upper surface of the terminal plate 51 is fitted therein so as to be able to move relative to each other in the vertical direction. is absorbed to prevent damage to the tension-resistant insulating tube 61.
Further, a seal member 71 is interposed between the engagement recess 65a and the engagement protrusion 51b. moreover,
A drop-off prevention bolt 72 is screwed into the terminal plate 51 through the mounting tube 65 and screwed onto the flange fitting 62 to allow relative movement between the insulator tube 45 and the tension-resistant insulating tube 61, and to prevent the insulator tube 45 from breaking when the insulator tube 45 is broken. This is to prevent the insulator from falling.

Further, a recess 51c is formed on the upper surface of the terminal plate 51, and a spring 79 having a shunt 78 is absorbed into the recess 51c, and its upper end is pressed against the lower surface of the mounting tube 65 to ensure electrical continuity. It is being

A lightning arrester element 73 made of a material mainly composed of zinc oxide and having nonlinear voltage-current characteristics is accommodated in the tension-resistant insulating cylinder 61. The lightning arrester 73 has annular clamping members 75, 75 engaged with contact fittings 74, 74 which are in contact with both the upper and lower ends.
A plurality of them are stacked together with a nut 77 through which a tightening rod 76 made of FRP is inserted.

Recess 55b of flange fitting 55 and contact fitting 74
As shown in FIG. 3, a spring 81 having a shunt 80 for pressing the element 73 to ensure good contact between the elements and for preventing mutual displacement of the elements due to external impact is housed between the spring 81 and the spring 81, as shown in FIG. has been done.

Next, the operation of the lightning arrester device for overhead power transmission lines constructed as described above will be explained.

Now, when an abnormal voltage occurs on an overhead power transmission line due to an unexpected large-scale lightning strike, this voltage is applied to the clamp 2.
8. Fifth connecting link 26, connecting plate 18, spacing rod 22, mounting plate 37 and lead wire 42
After passing through the lightning arrester 36, it flows through the hanging ears 49 of the flange fitting 46, the support fitting 40, the connecting link 33, the connecting yoke 6, and the hanging fittings 4 and 2 to the steel tower 1 and is grounded.

The abnormal current flows through the lightning arrester element 7 of the lightning arrester 36.
3, and in an electrically conductive state where the element 73 is destroyed, an ultra-high temperature arc is generated by the following current. As a result, the pressure inside the tension-resistant insulating tube 61 increases, the rupture discs 68 and 54 sequentially rupture, and ultra-high temperature arcs are emitted from the pressure relief passages 50a and 51a of the terminal plates 50 and 51 to the pressure relief passage forming cover 58 and 58 and is further discharged to the outside from the pressure relief ports 58a, 58a, and this arc moves between the pair of upper and lower arcing rings 60, 60.

Now, in the embodiment of the present invention, the suspension insulator chains 7, 7 are attached in a substantially inverted V-shape to the connection yoke 6 rotatably suspended from the steel tower 1, and the suspension insulator series 7 , 7 between the lower ends of the spacing rod 2
The power transmission line 30 is held in two places at both ends of the rod 22, and the upper end of the lightning arrester 33 is fixed at one point in the center of the connecting yoke 6. Since each of the above-mentioned members is configured to be symmetrical with respect to the center of rotation, that is, the perpendicular line H-H passing through the connecting pin 5, even if the transmission line 30 is swayed in the line direction due to wind, etc., it will not sway abnormally. Without this, the unbalance of the insulator chain load is suppressed, and collisions between the lightning arrester and the suspended insulator chain are less likely to occur. In addition, even if the insulator device tries to sway in a direction perpendicular to the line direction, the weight of the insulator acts on it, suppressing the amount of sway and preventing abnormal movement, which reduces the clearance between the energized side and the tower body. Collisions between the lightning arrester and the suspension insulator chain are also less likely to occur.

Furthermore, in the event that either one of the pair of suspended insulator chains 7, 7 is separated, one of the clamps 28 is moved downward by the weight of the power transmission line 30, but the amount of movement is not so large, and moreover, Since the clamp 28 also does not deviate much from its original position, the separated suspension insulator chain 7 is rotated toward the lightning arrester 33 around the connecting pin 8 solely by its own weight.
However, this rotational force is weak, so there is little shock caused by collision with the lightning arrester 33, and the lightning arrester 33 is not destroyed. As a result, the disconnected suspension insulator chain 7 may collide with the lightning arrester 33 and cause some damage to the lightning arrester, but the destruction of the normal suspension insulator chain 7 can be reliably prevented and the power transmission line 30 It can prevent falling to the ground.

In particular, in the embodiment of the present invention, the upper and lower connecting fittings 40 and 49 of the lightning arrester 36 are connected to the connecting yoke 6.
and the connecting pins 34, 3 for the spacing rod 22.
5, 39, and 41, the connecting yoke 6,
Even if the double suspended insulator chains 7, 7, the spacing holding rods 22, and the lightning arrester 36 sway in the direction of the track or in the orthogonal direction due to wind pressure, etc., the repetitive bending load acting on the lightning arrester 36 can be eliminated and reliability can be improved. .

Note that the present invention can also be embodied in the following embodiments.

(1) As shown in FIG. 6, a lightning arrester 36 is interposed between a pair of left and right suspension insulator chains 7, 7 that are parallel to each other. In this embodiment, even if one suspension insulator chain 7 breaks off, the impact at that time hardly acts on the lightning arrester 36 and the normal suspension insulator chain 7, so that the lightning arrester 36 is not damaged. There's nothing wrong with that.

In this embodiment, the upper ends of the suspension insulator chains 7, 7 are connected to the connection yoke 6 by a connecting pin 14 so as to be rotatable only in the track direction, but the suspension insulator chains 7, 7 themselves can be rotated in the direction perpendicular to the track. do. Therefore, the means for rotatably connecting in the direction perpendicular to the track is not limited to the connecting pin 10 described in the above embodiment.

(2) In each of the embodiments described above, the lightning arrester 36 is made unrotatable in the left-right direction, that is, in the track direction, and is mounted so that it can be rotated in the front-rear direction, that is, in the direction perpendicular to the track direction.

The embodiment described in this paragraph (2) is an embodiment of the first invention.

(3) Any lightning arrester may be used, such as a type of lightning arrester in which the rupture disc 68 or the pressure relief path forming covers 58, 58 are omitted.

(4) Instead of the suspension insulator chain 15, one or more long-stem insulators (not shown) may be used.

Effects of the Invention As detailed above, the first invention can improve the stability of the entire lightning arrester device for power transmission lines, and even if the suspension insulator is separated, a normal suspension insulator will be destroyed. It is possible to prevent the power transmission line from falling to the ground, and even if the power transmission line sways in a direction perpendicular to the line direction due to wind pressure, etc., the repetitive bending load on the connection part of the lightning arrester can be eliminated, and the lightning arrester This has the effect of preventing collision between the suspension insulator and the hanging insulator, and improving reliability.

In addition to the effects of the first invention, the second invention can eliminate the repeated bending load applied to the lightning arrester and the unbalance of the hanging insulator load even when the power transmission line sways in the line direction due to wind pressure, etc., thereby improving reliability. There are effects that can be further improved.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of a lightning arrester device for a power transmission line in a column-mounted state showing an embodiment of the present invention, Fig. 2 is an enlarged front view of the lightning arrester device, and Fig. 3 is the same as Fig. 2 Figure 4 is an enlarged half-sectional view taken along line A-A of Figure 2.
B-line enlarged half-sectional view, FIGS. 5 a to 5 are cross-sectional views of the spacing rod 22, FIG. 6 is a front view showing another example of the present invention, and FIGS. 7 and 8 are front views showing conventional examples, respectively. It is a diagram. 5... Connecting pin as rotation center, 6... Connecting yoke, 7... Suspension insulator chain as hanging insulator, 2
2... Spacing rod as a spacing member,
8, 10, 14, 34, 35, 39, 41... Connecting pin, 36... Lightning arrester, 40... Support metal fitting as a connecting metal fitting part, 49... Hanging ear as a connecting metal fitting part, H... Perpendicular line .

Claims (1)

[Scope of Claims] 1. A connecting yoke 6 is rotatably connected to the steel tower 1 via hanging fittings 2 and 4 in the direction of the transmission line and in the same orthogonal direction, and both ends of the connecting yoke 6 are The upper ends of the pair of left and right suspension insulators 7, 7 are connected rotatably in a direction perpendicular to the track direction by connecting pins 10, etc., and a space maintaining member is provided between the lower ends of both suspension insulators 7, 7. 22, a power transmission line 30 is supported at the lower part of the spacing member 22, and the upper and lower parts of the lightning arrester 36 are connected between the connecting yoke 6 and the spacing member 22 by connecting pins 3, respectively.
4, 39, etc., and connect the connecting yoke 6, suspension insulators 7, 7, spacing member 22, and lightning arrester 36 in a symmetrical manner with respect to a perpendicular line H passing through the rotation center 5 of the connecting yoke 6. Further, the connection fitting parts 40 and 49 on the upper part of the lightning arrester 36
A pole mounting structure for a lightning arrester device for an overhead power transmission line, characterized in that the connecting yoke 6 is rotatably connected to the connection yoke 6 by a connection pin 35 or the like in a direction substantially perpendicular to the line direction of the power transmission line. 2. The connecting fitting parts 40, 49 between the lightning arrester 36 and the connecting yoke 6 or the spacing member 22 have length adjustment mechanisms 38, 38a for absorbing dimensional tolerances between the suspension insulators 7, 7 and the lightning arrester 36. A pole mounting structure for a lightning arrester device for an overhead power transmission line according to claim 1. 3. A connecting yoke 6 is rotatably connected to the steel tower 11 via hanging fittings 2 and 4 in the direction of the power transmission line and in the orthogonal direction, and a pair of left and right hanging frames are attached to both ends of the connecting yoke 6. The upper ends of the insulators 7, 7 are connected rotatably in the track direction and the orthogonal direction by connecting pins 8, 10, 14, etc., respectively, and a spacing member 22 is provided between the lower ends of both the suspension insulators 7, 7. A power transmission line 30 is installed under the same distance maintaining member 22.
and supports the connection yoke 6 and the spacing member 22.
The upper and lower parts of the lightning arrester 36 are connected at one point each by connecting pins 34, 39, etc., between the
The connecting yoke 6, suspension insulators 7, 7, spacing member 22, and lightning arrester 36 are arranged symmetrically with respect to a perpendicular H passing through the rotation center 5 of the connecting yoke 6, and the upper part of the lightning arrester 36 A lightning arrester device for an overhead power transmission line, characterized in that the connecting fitting parts 40, 49 are rotatably connected to the connecting yoke 6 in the line direction of the power transmission line and in the orthogonal direction by connecting pins 35, 34, etc. Pillar structure.