JPH0310571Y2 - - Google Patents

Description

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

(Prior Art) Conventionally, as a multiple tension insulator device, for example, as shown in FIGS. 6 and 7, a double tension insulator is attached to a tower body 11 and supports a conductor 13 such as a high voltage line. Device 2
1 was hot.

This insulator device 21 roughly consists of a double insulator chain 1 in which two long insulators 3, 3 are connected in series.
Both ends of A and 1B are connected to shafts P2 and P3, which are connecting parts of yoke 2C on the tower body side and yoke 2D on the conductor side, respectively.
The tower body side yoke 2C is connected to the tower body 1.
1, the conductor-side yokes 2D were connected to the conductors, respectively.

Each component of the double tension insulator device 21 was designed to withstand tension based on certain safety standards.

(Problem that the invention aims to solve) However, in actual installation conditions, arcs caused by lightning or dirt on the insulator, abnormal wire tension caused by wind or gearropping, or insulator devices that occur especially in cold and snowy areas. natural phenomena such as snow caps,
Due to human factors such as impact during construction, a tension or impact greater than expected was applied to the insulator device 21, and there was a risk that it would separate at each connection portion. As a result, when the upper insulator link breaks, the separated upper insulator link collides with the lower healthy insulator link, causing the lower healthy insulator link to also be severed.
There was also the fear that power lines could fall to the ground, causing secondary disasters.

The purpose of this invention is to avoid collision with the lower sound insulator chain in the event that the upper insulator chain breaks due to abnormal tension or abnormal impact, and to minimize damage to the insulator device. Our objective is to provide insulator devices.

Structure of the invention (means for solving problems) This invention is based on the yokes 2A and 2B on the tower body side and the conductor side of a multiple tension insulator device 1 in which horizontal insulator chains 1A and 1B are vertically arranged in parallel. Then, the yoke 2
Connection part P2 between A, 2B and each insulator chain 1A, 1B,
A guide member 14 that guides the severed upper insulator series 1A to the side of the healthy lower insulator series 1B is protrudingly provided so as to be located between P3 and in the gap between each insulator series 1A and 1B. This configuration is adopted.

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

If some of the tension-resistant insulators in the upper insulator chain are severed due to abnormal tension or shock, the yokes on the tower side and conductor side that connect multiple insulator chains will be damaged by the tension of the electric wires. The healthy lower insulator link moves toward the severed upper insulator link. On the other hand, since the severed upper insulator string remains in its original position due to inertia, the healthy lower insulator string is in a state immediately before colliding with the severed upper insulator string.

Then, at this time, the separated upper insulator link is guided to the side of the healthy lower insulator link by the guide member, and collision with the lower insulator link is avoided. As a result, it is guided to the side of the healthy lower insulator chain. As a result, damage and separation of normal insulator links are prevented.

(Example) Hereinafter, an example embodying this invention will be described in the first to
This will be explained in detail according to FIG.

In the drawing, reference numeral 1 denotes a double tension insulator device in which horizontal insulator chains are arranged vertically in parallel, and roughly speaking, long-stem insulator chains 1A as upper and lower tension insulators are arranged in the vertical direction. Both ends of 1B are connected to a tower-side yoke 2A and a conductor-side yoke 2B, respectively.

To explain in detail about the double insulator chains 1A and 1B, 3 and 3 are long insulators made of solid porcelain with cap fittings 4 and 4 attached to both ends, and are connected by a horn fitting 5 to form the insulators. Series 1A, 1
It forms B. 6, 6 are both insulators 1A, 1B
Horn fittings 7, 7 are a pair of arc horns attached to the horn fittings 5, 6 at both ends of each long insulator 3, respectively.

Further, both ends of the insulator chains 1A and 1B are pivotally connected to shafts P2 and P3, which are connecting portions of both yokes 2A and 2B, so as to be rotatable in the vertical direction via right-angled clevis links 8 and 8, respectively. .

9, 9 are the yokes 2 on the tower side and conductor side, respectively.
This is a parallel clevis that is pivotally mounted to the shafts P1, P1, which are the connection parts of A and 2B, so as to be rotatable in the vertical direction. The device axis H1 that connects the shafts P1 and P1 is the axis H2 that connects the shafts P2 and P2, which is the connecting part between the upper insulator chain 1A and both yokes 2A and 2B, and the axis H2 that connects the shafts P2 and P2, which are the connection parts between the upper insulator chain 1A and both yokes 2A and 2B, and the axis H2 that connects the lower insulator chain 1B and both yokes 2A and 2B. Axis P3, P which is a connecting part
It is located between the axis H3 connecting the lines H3 and H3. The distance between the device axis H1 and the axis H2 is l1, and the device axis H
1 and the axis H3 is l2, then the axis P
1 and P1 with respect to both yokes 2A and 2B are set on the device axis H1 such that the value of l1/l2 satisfies 0.3<l1/l2<0.83.
That is, the parallel clevises 9, 9 of both yokes 2A, 2B are located at a position closer to the upper long insulator series 1A than the vertical center position of the upper long insulator series 1A and the lower long insulator series 1B. An eccentric yoke adapted to be mounted. 10 is tower body side yoke 2A
It is a right-angled clevis link connected to the parallel clevis 9 so as to be rotatable in the vertical direction, and fixes one end of the insulator device 1 to the tower body 11. Reference numeral 12 denotes a compression clamp for gripping a conductor 13 such as a high-voltage wire that is rotatably pivoted in the vertical direction on the parallel clevis 9 of the conductor-side yoke 2B, and has a jumper wire 1 at its base end.
A jumper wire connecting portion 12a is provided to connect the wires 3a.

Reference numeral 14 denotes a guide member attached between the shafts P2 and P3, which are connecting portions between the yokes 2A and 2B and the upper and lower insulator chains 1A and 1B, in both the yokes 2A and 2B, and , 1B. Reference numeral 14a denotes a pair of left and right guide parts attached to the tip of the guide member 14, which are provided in a downwardly inclined state. The guide member 14 and the guide portion 14a are provided on both yokes 2A and 2B so that most of their loads are applied below the device axis H1. 15
is a vertical weight provided at the lower part of the conductor side yoke 2B, and increases the load on the lower side of the yoke 2B. This vertical weight 15 is used to make the load on the lower side of the yoke 2B larger than the load on the upper side, and to increase the load on the lower side of the apparatus axis H1 as a whole.

Next, the operation of the vertically arranged double tension insulator device 1 constructed as described above will be explained.

This insulator device 1 maintains a stable vertical arrangement in a normal installed state.

That is, to explain the effect of gravity on this insulator device 1 with reference to FIGS. 2 and 3, generally speaking, the effect on the rotation of an object, that is, the moment of force (assumed to be N), is the length of the arm, that is, the center of rotation. The distance from
It is shown as the product of

That is, N=Fl [Unit: Nm] becomes.

Therefore, most of the mass of the insulator device 1 of this invention is assumed to be occupied by the upper and lower insulator chains 1A, 1B, the guide member 14, and the vertical plumb 15. Then, the gravity applied to the insulator device 1 is defined as the gravity (W1) applied to the upper long-stem insulator strand 1A, the lower long-stem insulator strand 1B,
Gravity (W2
) (W2>W1), as shown in Figure 2, the gravity W1 of the upper long-stem insulator strand 1A arranged vertically, and the gravity of the lower long-stem insulator 1B and vertical plumb. The gravity W2 applied to 15 and the guide member 14 is:
The length of each arm is up to the upper long trunk insulator 1A.
l1 and arm length l2 (l2
>l1) and the insulator device 1 is not twisted. Therefore, the insulator device 1 is normally supported in a stable vertical arrangement.

However, when a force F acts from the side of the insulator device 1, for example due to wind pressure, to cause the device 1 to twist around the device axis H1, the force of gravity W1,
W2 acts as a moment of force that resists the twisting of the device 1.

That is, in this insulator device 1, as schematically shown in FIG. The moment of the force expressed by the product of the component F1 of the force acting perpendicular to l1 (assumed to be N1), N1 = F1 × l1 and the length l2 of the arm of the lower long insulator chain 1B, The moment of force (denoted as N2) represented by the product of the sum of the gravitational forces W2 applied to the insulator chain 1B, the vertical weight 15, and the guard member 14 and the component F2 of the force acting perpendicularly to the length l2 of the arm, N2 ＝F2×l2 acts, and since F2>F1 and l2>l1, a difference occurs in the moment of force between N2 and N1.

That is, by a moment of force of magnitude N=N2−N1>0, the insulator device 1
tries to return to its original stable state due to the reaction in the X direction.

As explained above using the mechanical model,
This insulator device 1 is difficult to twist as a whole even when wind pressure or the like acts on it. Therefore, this insulator device 1 is maintained in a stable vertical alignment state.

However, in the unlikely event that an abnormal tension or an abnormal impact is applied to this insulator device 1, each connecting portion of the insulator device 1, for example, the axis P2 of the connecting portion between the conductor side yoke 2B and the upper long-stem insulator chain 1A, becomes separated. When cut, the upper long-stem insulator strings 1A, which were arranged in parallel, have the yokes 2A and 2B on the tower body side and the conductor side connected to the normal lower long-stem insulator strings 1B by the tension of the conductors, such as the axis P3, It will rotate around the axis H3 connecting P3. Then, the normal insulator chain 1B tries to move in the direction of the severed insulator chain 1A, while the severed insulator chain 1A tries to stay in its original position due to inertia. It will be in a pre-collision state with series 1A.

At this time, as shown in FIG. 4, the separated insulator chain 1A is attached to the axis P2 of the connecting portion, or to the connecting portion between the right angle clevis link 8 and the horn fitting 6, or between the horn fitting 6 and the cap fitting 4. It rotates around the connecting part with the insulator chain 1B, and is in a state approaching the normal insulator chain 1B.

However, when the severed insulator chain 1A rotates to some extent and becomes tilted, the vicinity of the base end connection portion comes into contact with the guide member 14 protruding from the tower side yoke 2A, that is, the horn mounting bracket 6 The attached arc horn 7 comes into contact with the guide member 14. Then, the arc horn 7 has its annular creeping surface in contact with the guide member 14 and the guide member 14
furthermore, as shown in FIG.
direction). Therefore, the collision between the severed upper insulator chain 1A and the normal insulator chain 1B is avoided, and as a result, the normal lower insulator chain 1B is damaged and severed due to the collision with the severed upper insulator chain 1A. is prevented.

Moreover, this idea can also be implemented as follows.

(1) The guide member 14 must be formed integrally with the yokes 2A and 2B.

(2) Connect the guide member 14 to the tower side yoke 2A, or
Attach it to at least one yoke of the conductor side yoke 2B.

Effects of the invention As detailed above, the insulator device of this invention has
Even if the upper insulator link of an insulator device in which horizontal insulator links are vertically arranged in parallel is severed due to an unpredictable action such as abnormal tension or abnormal impact, the severed upper insulator link will The guide member guides the healthy lower insulator string to the side and avoids collision with the lower insulator string, which prevents the healthy lower insulator string from being damaged or separated, and furthermore, prevents the high-voltage line from breaking above the ground. It is possible to prevent secondary disasters such as falls, and since the guide member need only be installed on the yoke and does not need to be attached to each insulator constituting the insulator chain, it has an excellent effect of preventing disasters at low cost. play.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of this invention, Figs. 2 and 3 are schematic diagrams showing the action of the embodiment of this invention on gravity, and Fig. 4 is a part showing the working state of the embodiment of this invention. An enlarged front view, FIG. 5 is a schematic view showing the operating state of the embodiment, FIG. 6 is a perspective view showing the conventional insulator device installed, and FIG. 7 is a plan view showing the conventional insulator device. . 1...Insulator device, 1A...Upper long trunk insulator chain, 1
B...Lower long trunk insulator, 2A...Tower body side yoke,
2B...Conductor side yoke, 3...Long stem insulator, 4...
Cap metal fittings, 5, 6...Horn mounting metal fittings, 7...
...Arc horn, 8, 10...Right angle clevis link, 9...Parallel clevis, 11...Tower body, 12...
...Compression clamp, 13...Conductor, 14...Guard member, 14a...Guide member, 15...Plumb.

Claims (1)

[Claims for Utility Model Registration] 1. With respect to the yokes 2A, 2B on the tower body side and the conductor side of the multiple tension insulator device 1 in which horizontal insulator chains 1A, 1B are vertically arranged in parallel, the yokes 2A, 2
Connecting parts P2, P3 between B and each insulator chain 1A, 1B
Located between each insulator chain 1A and 1B
This multiple tension insulator device is characterized by a guide member 14 protruding from the upper insulator chain 1A that guides the severed upper insulator chain 1A to the side of the healthy lower insulator chain 1B so as to be located at . 2. The multiple tension insulator device according to claim 1, wherein the guide member 14 is provided integrally with or separately from the yokes 2A and 2B. 3. The multiple tension insulator device according to claim 1, wherein the guide member 14 has downwardly inclined guide portions 14a on both sides thereof.