JPH0310572Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to a multiple tension insulator device in which horizontal insulator chains are vertically arranged in parallel.

(Prior Art) Conventionally, a vertically arranged double tension insulator device as shown in FIG. 7 has been used as a multiple tension insulator device.
This insulator device has a pair of long-stem insulators 42, 43 formed by connecting two long-stem insulators 40, 41 in series, which are arranged in upper and lower two stages and in parallel.
Yoke 44 on the tower body side connected to one end of 2, 43
was connected to the tower body 1, and the conductor 16 was connected to a yoke 45 on the conductor side connected to the other end. Each component of this double tension insulator device has a tension design based on certain safety standards.

(Problem that the invention aims to solve) However, in actual installation conditions, arcing occurs due to lightning strikes, contamination of the insulator surface, or flashover due to deterioration of insulation performance, and wire abnormalities occur due to wind and gearropping. In addition to natural phenomena such as tension or snow-covering of the insulator device that occurs in particularly cold and snowy regions, a higher than expected tension is applied to the insulator device due to human factors such as shock during construction, causing damage to both insulator chains 42 and 43. There was a risk that one of them would separate. If the upper insulator link 42 were to break off, the separated insulator link 42 would tend to remain in its original position due to inertia, and the normal lower insulator link 43 that would not break would have both yokes 44 and 45 momentarily removed. The insulators 42 and 43 are tilted toward the center, and the normal insulator 43 and the separated insulator 42 collide and damage the normal insulator 43. Ren 4
If the normal lower insulator chain 43 were to break following 2, there was a risk of a secondary disaster in which conductors such as high-voltage lines would fall to the ground.

The purpose of this device is to minimize the mechanical impact on the normal lower insulator chain in the event that the upper insulator chain breaks off due to some reason, thereby preventing the occurrence of secondary disasters. An object of the present invention is to provide a multiple tension insulator device capable of preventing accidents.

Structure of the invention (means for solving the problem) In order to achieve the above-mentioned object, this invention is a multiplex insulator series in which horizontal insulator chains 20 and 21 are vertically arranged in parallel between the tower side yoke 7 and the conductor side yoke 12. In the continuous tension insulator device, the yokes 7, 12 and the insulator series 20,
When the upper insulator chain 20 is separated from the connecting part J of 21 or the connecting part J' between the connecting part J and each of the insulator chains 20, 21 itself, the yokes 7, 12 are cantilevered due to the disconnection. The mounting angles γ,
A method is adopted in which a stopper portion is provided to prevent collision between the upper insulator chain, which has been severed by forming θ to a predetermined angle or more, and the healthy lower insulator chain.

(Function) By adopting the above-mentioned means, this device functions as follows.

When the upper insulator run of horizontal insulators arranged vertically in parallel is separated, the balance of tension acting on the tower side yoke and the conductor side yoke is lost, and both yokes are instantly tilted, causing the normal lower insulator to break. The upper insulator link and the separated upper insulator link approach each other. At this time, the mounting angle between the yoke and the upper insulator link, or the mounting angle between the upper insulator link and the upper insulator link itself is fixed by a stopper provided at the connection between the separated upper insulator link and the yoke, or the connection part of the upper insulator link itself. Since the angle is formed at a certain angle or more, the upper insulator strand, which is cantilevered by the yoke due to separation, is regulated and held at least approximately parallel to the axial direction of the normal lower insulator strand, and the conductor It does not come into contact with the healthy lower insulator chain, which has been displaced almost linearly due to the tensile load.
Therefore, a collision between the normal insulator series and the separated insulator series is avoided.

(Embodiment) An embodiment embodying this invention will be described below with reference to Figs. A parallel clevis 5 is connected to the link 3 by a shaft 4 so as to be rotatable in the vertical direction.
A tower side yoke 7 is connected to the end of the parallel clevis 5 by a shaft 6 so as to be rotatable in the vertical direction.
The left end portions of two sets of upper and lower long-stem insulators 20 and 21 as tension-resistant insulators, which will be described in detail later, are connected to both upper and lower ends of the tower side yoke 7 via shafts 8 and 9, and both long-stem insulators The right end of the series 20, 21 is connected to the shaft 1.
0 and 11 are connected to both upper and lower ends of the conductor side yoke 12. Further, a parallel clevis 13 is connected to the yoke 12 so as to be rotatable in the vertical direction by a shaft 14, and a compression clamp 17 is attached to the right end of the parallel clevis 13 to grip a conductor 16 such as a high voltage line by a shaft 15 in the vertical direction. are connected so as to be rotatable in the direction,
A compression clamp 19 for gripping the jumper wire 18 is attached to the base end of the clamp 17.

The shafts 6, 14 are offset a predetermined distance upward from the vertical center points of the shafts 8, 10 and 9, 11, and the inertia of the lower long insulator chain 21 about the axis passing through both shafts 6, 14 is The moment is made larger than the moment of inertia of the upper long insulator chain 20 to improve stability.

Since the upper and lower two-stage long-stem insulator runs 20 and 21 are constructed almost in the same way, the upper long-stem insulator run 2
0 configuration and the lower long trunk insulator series 21.
are given the same reference numerals and the explanation will be omitted.

The upper insulator chain 20 is constructed by connecting in series long insulators 22 and 23 on the tower body side and the conductor side, which are formed in substantially the same way. A pair of cap metal fittings 24 fitted and fixed to both ends of the long insulator 22 on the tower body side,
25, a shaft 26 is attached to the tower body side cap fitting 24.
The horn mounting bracket 28 to which the arc horn 27 is attached is connected to be rotatable in the vertical direction.
Further, the right angle clevis link 29, which is connected to the upper end of the yoke 7 on the tower body side so as to be rotatable in the vertical direction by the shaft 8, and the horn mounting bracket 28 are also connected so as to be rotatable in the horizontal direction by the shaft 30. ing.

On the other hand, a horn mounting bracket 33 to which an arc horn 32 is attached via shafts 31, 31 is attached to the opposing cap brackets 25, 24 of the long trunk insulators 22, 23.
Both ends of the long insulators 22 and 23 (constituting the connecting portion J' of the long insulators 22 and 23) are connected to be rotatable in the vertical direction. The connecting portion J between the long insulator 23 and the conductor side yoke 12 is the connecting portion J between the tower body side yoke 7 and the long insulator 22 (consisting of the horn mounting bracket 28 and the right angle clevis link 29). Since the structure is similar to that of , the same reference numerals are given and the explanation is omitted.

Next, the configuration of the main parts will be explained with reference to FIGS. 3 and 4.

As shown in FIG. 3, the right angle clevis link 2
A mountain-shaped stopper portion 29a is formed on the inner top surface of the recess 9, and the link 29a for the tower side yoke 7 is formed.
The mounting angle α can be regulated.

Further, a stopper portion 28a is integrally formed on the lower side of the end of the horn mounting bracket 28, and comes into contact with a mountain-shaped stopper portion 24a formed on the top surface of the recessed portion of the cap metal fitting 24 to connect the horn mounting bracket 28 to the end thereof. The mounting angle β with the trunk insulator 22 can be regulated. At the connecting portion J on the tower body side, the mounting angle γ between the tower body side yoke 7 and the long insulator 22 is set not to be less than a predetermined angle.

As shown in FIG. 4, stopper portions 33a and 33b are also protrudingly provided on the lower side of both ends of the horn mounting bracket 33 between the long insulators 22 and 23, and the cap bracket 2
Both long stem insulators 2 are brought into contact with the mountain-shaped stopper portions 25a and 24a formed on the inner top surfaces of the recesses 5 and 24.
The mounting angle θ of 2 and 23 is made not to be less than a predetermined angle.

Next, the operation of the multiple tension insulator device constructed as described above will be explained.

When the multiple tension insulator device is installed, a tensile load is applied to the tower body 1 through the insulator device due to the weight of the conductor 16 and wind pressure. This load is shared by the upper and lower two-stage long-stem insulator chains 20 and 21.

If, for example, the upper long trunk insulator chain 20 is severed due to an arc caused by a large-scale lightning strike, the balance of the tensile loads acting on the tower body side yoke 7 and the conductor side yoke 12 will be lost, and the lower long trunk All the loads act on the insulator chain 21, and both yokes 7, 12 and the long insulator chain 21 are displaced approximately linearly as shown in FIG.

In synchronization with this operation, the upper long insulator chain 20 that has been cut off becomes cantilevered by its own weight and is cantilevered by the connecting portion J on the tower body side. That is, as shown in FIG. 3, the stopper part 29a of the right angle clevis link 29 is locked to one side edge of the yoke 7, and the mounting angle α of both is held at a predetermined angle, so that the stopper part 28a of the horn mounting bracket 28 The stopper portion 24a of the cap fitting 24 comes into contact with the cap fitting 24, and the mounting angle β between the two is maintained at a predetermined angle.Therefore, the mounting angle γ of the long-stem insulator 22 with respect to the yoke 7 is held at a predetermined angle, and the long-stem insulator The ream 20 is lifted upward from its original position.

Also, at the connecting portion J' of both long trunk insulators 22, 23, the stopper portions 33a, 3 of the horn mounting bracket 33 are connected.
3b and the stopper part 2 of the cap fittings 25, 24
Due to contact with 5a, 24a, both long trunk insulators 22, 2
The mounting angle θ of No. 3 is maintained at a predetermined angle, so that collision between the separated long insulators 22 and 23 on the conductor side and the normal long insulator chain 21 is avoided.

In addition, since the right angle clevis link 29 and the horn mounting bracket 28 are connected so as to be rotatable in the horizontal direction, the separated long insulator chain 20 is rotated laterally around the shaft 30 and moved below the yoke 7. Although it hangs down, the same insulator chain 20 does not interfere with the normal insulator chain 21 at this time.

Note that this idea can also be embodied as follows.

(1) As shown in FIGS. 5 and 6, a guard member 34 is fixed to both the yokes 7 and 21, and an inverted V-shaped guide member 35 is fixed to the guard member 34. . In this case, when the insulator chain 20 is cut off, the stopper portions 24a, 25
a, 28a, 29a, 33a, 33b is reduced to eliminate damage to the same parts and improve reliability, and the insulator chain 20 is secured by the guard member 34 as shown by the two-dot chain line in FIG. Since it is guided laterally as shown in , collision between the insulator chains 20 and 21 can be more reliably prevented.

(2) A plumb weight (not shown) is attached to the lower end of both the yokes 7, 12 to improve stability against twisting force acting around the straight line connecting the shafts 6, 14.

(3) To be embodied in a multiple tension insulator device in which three or more long-stem insulator chains or suspended insulator chains are arranged in parallel.

Effects of the invention As detailed above, with this invention, even if the upper insulator link were to break off, since the angle of attachment of the insulator link to the yoke is greater than a predetermined angle, the breakage would cause the yoke to The cantilevered upper insulator string is regulated and held at least approximately parallel to the axial direction of the healthy lower insulator string, and the healthy lower insulator string is displaced approximately linearly by the tensile load of the conductor. This avoids collision between the separated upper insulator link and the healthy lower insulator link, and has the effect of preventing secondary disasters such as conductors such as high-voltage lines falling to the ground. be.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the multiple tension insulator device of this invention in a column-mounted state; FIG. 2 is a partially omitted front view showing a state in which the long insulator strings have been separated; Fig. 3 is a partially enlarged front view of the connecting part between the yoke and the insulator chain, Fig. 4 is a partially enlarged sectional view of the connecting part between the long insulators, and Fig. 5 is a partial front view showing another example of this invention. , FIG. 6 is a schematic side view for explaining the operation of the same modification, and FIG. 7 is a front view showing a conventional multiple tension insulator device. 1... Tower body, 7, 12... Tower body side (conductor side) yoke, 16... Conductor, 20, 21... Upper (lower) long trunk insulator chain as a tension insulator, 22, 23...
Long trunk insulator, 24, 25...Tower body side (conductor side) cap metal fitting, 24a, 25a, 28a, 29a, 3
3a, 33b... Stopper part, 28, 33... Horn mounting bracket, 29... Right angle clevis link,
α, β, γ, θ...Installation angle, J, J'...Connection part.

Claims (1)

[Claims for Utility Model Registration] 1. A multiple tension insulator device in which horizontal insulator chains 20, 21 are vertically arranged in parallel between a tower side yoke 7 and a conductor side yoke 12, wherein the yokes 7, 12 and the insulators The connecting portion J of the reams 20 and 21, or the connecting portion J and each of the insulator reams 2
When the upper insulator chain 20 is separated from the connecting part J' of the yokes 7 and 12, the upper insulator chain 20 cantilevered by the yokes 7 and 12 is separated from the healthy lower insulator chain 21. The mounting angles γ and θ of the insulator chains 20 and 21 relative to the yokes 7 and 12 are formed to be greater than a predetermined angle so that the insulator links 20 and 21 are regulated and held at least approximately parallel to the axial direction. A multiple tension insulator device characterized by being provided with a stopper portion for preventing collision with a lower insulator run. 2. A stopper portion 29a is formed on the right angle clevis link 29, which is rotatably connected to the yokes 7, 12 by shafts 8, 9, for regulating the mounting angle α with the yokes 7, 12, and The horn mounting bracket 28 is rotatably connected by shafts 26, 30 between the link 29 and the cap brackets 24, 25 of the long insulators 22, 23 constituting the insulator chains 20, 21. 2
A stopper portion 28a contacts the stopper portions 24a, 25a of No. 4, 25 to regulate the mounting angle β between the horn mounting bracket 28 and the long insulators 22, 23.
are formed, and the stopper portions 29a, 24a,
The multiple tension insulator device according to claim 1, wherein the mounting angle γ of the long insulators 22, 23 relative to the yokes 7, 12 is regulated by 25a, 28a. 3 Long stem insulator 2 that constitutes the insulator series 20 and 21
The horn mounting bracket (339) is rotatably connected to the opposing cap metal fittings 24, 25 of 2, 23 by a shaft 31.
The double-row insulator according to claim 1 or 2, wherein stopper portions 33a, 33b are formed to abut against the long insulators 22, 23, and the mounting angle θ of the long insulators 22, 23 is regulated. Zhang insulator device.