JPS6235413A - Vertically arranged multi-throw anti-tension 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 Object of the Invention (Field of Industrial Application) The present invention relates to a vertically arranged multiple tension insulator device in which a plurality of insulator chains are arranged vertically and vertically.

(Prior Art) Conventionally, as a multiple tension insulator device attached to the tower body 11,
A horizontal arrangement as shown in FIG. 6 is used.

This horizontally arranged insulator device 15 may be covered with snow in a cold and snowy region, and this snow cap may deform the metal fittings of the insulator device 15 or reduce its withstand voltage characteristics.

Therefore, in order to reduce the snow cover of the insulator device 15, for example, a vertically arranged multi-strand tension insulator device 15 in which insulator chains are arranged vertically as shown in FIG. 7 is provided.

This insulator device 15 roughly consists of arranging insulator chains 1A and 1B in upper and lower two stages in which one or more long-stem insulators 3゜3 are connected in series, and connecting both ends of both insulator chains 1A and 1B to towers, respectively. An axis P that is a connecting portion between the body side yoke 2C and the conductor side yoke 2D
2. It was formed by connecting to P3. Then, the shafts P1 and Pl, which are the connection parts between the tower body 11 and the conductor 13 and both yokes 2C and 2D, are connected to the upper insulator chain 1A and both yokes 2C92 and 2C.
Axis P2, which is the connecting part with D. It was provided at the vertical center position between P2 and the shafts P3 and P3, which are the connection parts between the lower insulator chain 1B and both yokes 2C and 2D. That is, axis P2. Axis '4fAH2 connecting P2 and axis PL, device axis H1 connecting PL
The axes PL, PL were provided so that the distance between the axis P3 and the apparatus axis H1 was 11, and the distance between the axis H3 connecting the axis P3 and the apparatus axis H1 was 12.

(Problem to be solved by the invention) However, both yokes 2C of the insulator device 15.

2D is originally similar to a balance yoke used in horizontally arranged multiple tension insulator devices. Therefore, when this is used in a vertically arranged multiple tension insulator device such as the insulator device 15 on a power transmission line, the conductor 13 such as a high voltage line attached to the compression clamp 12 may be twisted or Due to the action of both yokes 2C.

A twisting force acts on 2D around the device axis H1 on the conductor side and tower side, and in particular, the yoke 2D on the conductor side twists, causing the axes Pi and PI on the tower side and conductor side, and the long insulator 3.3. Axis P2
．． Deformation occurs at P3, or both upper and lower insulators 1A
, 1B's vertical (vertical) arrangement was disrupted, resulting in a diagonal arrangement. As a result, during snowfall, Ryotokukoren 1A.

Not only is it easier for 1B to have a snow cap, but due to the snow cap,
There was a risk that the arrangement balance of the insulator chains 1A and 1B would be lost, and that the metal fittings would be deformed on the axes PI and Pi on the conductor side and the tower body side.

The object of the present invention is to provide a vertically arranged multi-strand tension-resistant insulator device that can maintain a stable arrangement of insulator chains against the effects of twisting of conductors, wind pressure, etc.

Structure of the Invention (Means for Solving Problems) This invention provides a tower body side yoke 2A connected to the tower body 11 at one point by a connecting part P1, and a connecting part P1 to the conductor 13.
A plurality of insulator chains 1A and 1B are vertically connected in parallel with a conductor side yoke 2B connected at one point by 1 at a predetermined interval.

Then, the device axis H1 connecting the connecting parts Pi and P1 on the tower body side and the conductor side is set to the axis H2 of the upper insulator chain 1A so that the moment of inertia of the lower insulator chain 1B is larger than the moment of inertia of the upper insulator chain 1A. A configuration is adopted in which the lower insulator chain 1B is provided above the vertical center position of the axis H3 of the lower insulator chain 1B.

(Function) By employing the above-mentioned means, the present invention functions as follows.

In the vertically arranged insulator series, the area of the insulator device as a whole is reduced in the horizontal direction, and the spread of continuous snow cap in the same direction is reduced.

Furthermore, the moment of inertia of the lower insulator chain is larger than the moment of inertia of the upper insulator chain, centering on the device axis passing through the connection parts on both sides of the insulator device with respect to the tower body and the conductor, The moment of inertia of the insulator device increases, and twisting is less likely to occur in response to the twisting torque of the conductor compared to conventional insulator devices.

Further, due to the effect of the difference in the moment of force due to gravity between the upper and lower insulator chains, the insulator device is always in a stable vertically arranged state even if rotational force due to wind pressure or the like is applied.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to FIGS. 1 to 5.

In the drawing, reference numeral 1 indicates the entire insulator device, and roughly speaking, both ends of insulator chains 1A and 1B as upper and lower tension insulators arranged vertically in parallel, that is, vertically, are connected to a tower side yoke 2A, respectively. It is configured to be connected to the conductor side yoke 2B.

To explain in detail the above-mentioned Ryotokukoren 1A and 1B, 3
is a long-stem insulator made of solid porcelain with cap fittings 4.4 attached to both ends, and two insulators are connected in series by a horn fitting 5 to form upper and lower insulator chains 1A and 1B, respectively. There is. Reference numeral 6 denotes a horn mounting bracket attached to both ends of the two-piece insulators 1A and 1B, and 7.7 indicates a pair of arc horns attached to the horn attachment brackets 5 and 6, respectively, at both ends of each long insulator 3. It is.

Furthermore, both ends of the insulator chains 1A and 1B are vertically rotatably connected to shafts P2., which are connecting portions of the yokes 2A and 2B, via right-angled clevis links 8.8, respectively. Connected to P3.

9.9 are the yokes 2A and 2B on the tower side and conductor side, respectively.
It is a horizontal revis that is rotatably connected in the vertical direction to the shafts PI, which are the connecting parts of the PI. The axis PI, the device axis connecting PI, vj! H1 is upper insulator chain 1A and both yokes 2A
, 2B. The axis H2 of the upper insulator chain 1A connecting P2, the lower insulator chain 1B and both yokes 2A, 2
Axis P3, which is the connecting part with B. Lower insulator 1B connecting P3
and the axis H3. If the distance between the device axis H1 and the axis H2 is Nl, and the distance between the device axis H1 and the axis H3 is 22, then both the yokes 2A of the axes PL and PI
, the setting position for 2B is /! A value of 1/62 is provided on the device axis N1 such that 0.3<ff 1/F 2<0.83.

That is, both the yokes 2A and 2B
．． Reference numeral 9 denotes an eccentric yoke mounted at a position closer to the upper insulator series 1A than the vertically intermediate position between the upper insulator series LA and the lower insulator series 1B. The above formula, 0.3<f 1/12<
The appropriate lower limit of the range of 0.83 is 400 mm when the distance between insulators 1A and 1B is normal, and the distance from the center to the lower end is 300 mm to ensure clearance with the jumper wire.
Since up to mm is suitable, 61 = 100 11 N2 = 30 (1 + ugly), and it is determined as 1/β2 = 0.3. Also, the upper limit of the range is that the shared load on the insulator chain is the safety factor. By being 2.5 or less, for example,
Considering the wire tension up to 8.8 totu, in a 12 ton insulator chain, if the position of the lower insulator chain is determined so that the allowable load of 4.8 totu is applied to the upper insulator chain, 12=1.211, β1#2= It is determined to be 0.83.

Furthermore, IO is a right angle clevis link connected to the parallel clevises 9 of the two tower side yokes so as to be rotatable in the vertical direction, and one end of the insulator device 1 is connected to the tower body 11 so as to be rotatable in the horizontal direction. are doing. Reference numeral 12 denotes a compression clamp for gripping a conductor 13 such as a high-voltage line, which is vertically rotatably connected to the horizontal recess 9 of the conductor-side yoke 2B, and a compression clamp 12a for a jumper wire 13a is provided at the base end of the compression clamp 12. is provided.

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

In general, the magnitude of the inertia of an object with respect to rotational motion, that is, the moment of inertia (referred to as I), is determined by the mass of each part of the object (referred to as m) and the distance from the center of rotation to each part (referred to as l). ) and the square of

That is, 1=m1″ (unit: kg, m) becomes.

Here, the above-mentioned insulator device 1 will be explained as a model.

First, let the mass of the entire insulator device l be M, and since most of it is concentrated in both the upper and lower insulator chains 1A and 1B, the masses of the upper and lower insulator chains 1A and 1B are similarly 0.
5 M, and the distance from the device axis H1 (N shown in Figure 1)
l, β2) are respectively assumed as follows.

ff 1 = 0.3 L, N 2 = 0.7 L (
#l+12=L, ff1l/j! 2=0.43) At this time, the moment of inertia I of this insulator device 1, that is, the magnitude of the resistance to twisting of the insulator device l, is
It can be expressed as the sum of the moment of inertia of A (denoted as Il) and the moment of inertia of the lower insulator chain 1B (denoted as I2).

That is, ! =Il+12 becomes. Therefore, 1=0.045ML+0.245ML =0.29ML, L becomes.

On the other hand, regarding the conventional insulator device, all other conditions are the same as above, the mass of each of the upper and lower insulator chains 1A and 1B is 0.5M, the distance from the device axis H1, N1 = β2 =
Assuming 0.5 L, the moment of inertia ■ can be expressed as follows. That is, I=11+12 10, 125Mpi+0.125ML1 =0.25ML1. Therefore, 0.29 Mpi>0.25MtF.

That is, an eccentric yoke 2A like this invention.

When using 2B, the conventional balance yoke 2C.

Compared to the use of 2D, the moment of inertia 1 of the insulator device as a whole becomes larger. Therefore, even if a twisting action (for example, twisting force of a high-voltage line) is applied to the insulator device 1 about the device axis H1, this insulator device 1 is different from the conventional insulator device 15.
It is more difficult to be twisted than

Here, the relationship between the twisting action acting on the insulator device 1, that is, the twisting torque, and the twisting angle of the conductor side yokes 2B and 2D is expressed as follows: #1/A2=0.67 for the eccentric yoke and AI #! FIG. 2 shows the results of an experiment conducted on the insulator devices 1 and 15 using a conventional balance yoke where 2=1.

As is clear from the figure, the eccentric yoke 2B always has a smaller twist angle than the conventional balance yoke 2D, and the insulator device 1 using the eccentric yoke 2B of the present invention uses the conventional balance yoke 2D. It can be seen that the insulator device 15 is less likely to be twisted than the insulator device 15 that was previously used.

The resistance to twisting, that is, the moment of inertia {circle around (2)} increases as the value of ρ1/12 decreases, and the insulator device 1 becomes even more difficult to twist.

Next, the effect of gravity on this insulator device 1 will be explained with reference to FIGS. 3 to 5.

By the way, in -i, the effect on the rotation of the object, that is, the moment of force (denoted as N), is the length of the arm, that is, the distance from the center of rotation to the point of application of the force (denoted as p), and the length of the arm (denoted as p). It is expressed as the product of the force acting perpendicularly to the length (denoted as F).

That is, N=F1 (unit: Nm) becomes.

Therefore, as shown in FIG. 3, the gravity that is normally applied to the vertically arranged insulator devices 1, mainly the gravity W1 of the upper insulator chain 1A and the gravity W2 of the lower insulator chain 1B, are Since it does not act at right angles to the arm length β1 and the arm length 12 <12>11) up to the lower insulator chain 1B, the insulator device 1 is not rotated. Therefore, the insulator device 1 is supported in a stable vertical arrangement.

However, when a rotational force F is applied from the side of the insulator device 1 to the lower insulator chain 1B around the device axis H1 due to, for example, wind pressure, gravity Wl.

W2 produces a reaction as a moment of force that resists the rotation of the device 1.

That is, as shown in FIG. 4, this insulator device 1 includes:
The moment of force (Nl and ), N1=FIXfl and the product of the length 12 of the arm on the lower insulator chain 1B side and the component F2 of the force exerted by the gravity W2 on the same insulator chain 1B at right angles to the arm length I2. The moment of force (N
2), a difference in the moment of force occurs as N2=F2xI12.

That is, the insulator device 1 is constantly trying to return to its original stable state due to the reaction in the X direction due to the moment of force of the magnitude N=N2-Nl>0.

On the other hand, in the insulator device 15 using the conventional balance yoke 2C92D, as shown in FIG. That is, since N=N2-N1=0, it does not receive the reaction of the moment of force due to the action of gravity, and does not attempt to return to its original resting state in response to the force F of wind pressure.

As explained above using the mechanical model, the insulator device 1 as a whole is difficult to twist even when the twisting force of the conductor or the force of wind pressure is applied. Therefore, the horn mounting bracket 5 that connects the upper and lower insulator chains 1A, 1BO long-stem insulators 3, 3 of this insulator device 1, both the upper and lower insulator series 1A,
1B and both yokes 2A, 2B, the right angle clevis link 8.8, or the horizontal clevis link 9, the right angle clevis link 10, which connects the insulator device l and the tower body 11, and especially the conductor 13. Unreasonable force does not act on the flat revise 9, compression clamp 12, etc. on which the twisting torque directly acts, and deformation and destruction are unlikely to occur.

Effects of the Invention As detailed above, compared to conventional insulator devices, the insulator device itself is less likely to be twisted even when external forces such as twisting torque of a conductor or wind pressure act. Since the conductor side yoke is also twisted, a stable vertical arrangement of the insulators can be maintained. Therefore, it is possible to provide a vertically arranged multiple tension insulator and device for disposing high voltage lines on a steel tower, which has excellent balance and has a long service life.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 shows experimental results comparing the relationship between the twisting torque and the twisting angle of the conductor side yoke between the insulator device of the above embodiment and a conventional insulator device. 3.4 is a schematic diagram of the effect of the embodiment of the present invention on gravity, FIG. 5 is a schematic diagram of the effect of a conventional insulator device on gravity, and FIG. 6 is a diagram of the installed state of the conventional insulator device. FIG. 7 is the same (a front view showing a conventional insulator device). 1... Insulator device, 1A... Upper insulator chain, 1B...
Lower insulator chain, 2A... tower body side yoke, 2B... conductor side yoke, 3... long insulator, 4... cap metal fitting,
5.6... Horn mounting bracket, 7... Arc horn,
8, 10... Right angle clevis link, 9... Flat clevis, 11... Tower body, 12... Compression clamp, 13
···conductor. Patent applicant Tohoku Electric Power Co., Ltd. Nippon Insulator Co., Ltd. Asahi Malleable Iron Co., Ltd.

Claims (1)

[Claims] 1. A tower body side yoke (2A) connected to the tower body (11) at one point by a connecting part (P1), and connected to the conductor (13) at one point by a connecting part (P1) Conductor side yoke (
2B) and multiple insulators (1A, 1B) above and below,
and a device axis (H1) that is connected in parallel at a predetermined interval and connects the connecting parts (P1, P1) on the tower body side and the conductor side.
, the axis line (H2) of the upper insulator link (1A) and the lower insulator link (1B) so that the moment of inertia of the lower insulator link (1B) is larger than the moment of inertia of the upper insulator link (1A).
A vertically arranged multiple tension insulator device characterized in that it is provided above a vertically central position with respect to an axis (H3). 2. Device axis (H1) connecting the axis (H2) of the upper insulator chain (1A) and the connection part (P1, P1) on the tower side and conductor side
and the axis (H3) of the lower insulator chain (1B).
) and the device axis (H1) is l2, then l
The value of 1/l2 is set in the range of 0≦l1/l2<1, preferably in the range of 0.3<l1/l2<0.83. Zhang insulator device.