JPH04306516A - Strain insulator device for multiple conductors - Google Patents

Abstract

PURPOSE:To provide the constitution wherein a multiple conductor anchor yoke for anchoring a multiple conductor comprising an even number, six or more, of conductors can be easily fabricated, handled and carried. CONSTITUTION:A pair of vertical yokes 17 and 17 are connected to a horizontal yoke 12 connected to parallel insulator strings 6 and 6 via rectangular crevices 16 and 16. In addition, conductor side horizontal yoke sections 21a to 21d for fitting strain clamps are horizontally connected to the upper and lower ends of the vertical yoke pair via a pair of rectangular crevices 18 and 18.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-conductor tension insulator device for UHV-class large-capacity power transmission, and the multi-conductors to be restrained are even-numbered multi-conductors of six or more conductors.

0002

2. Description of the Related Art In this type of multi-conductor tension insulator device, as shown in FIG. 5 and FIG. -Near metal fitting 53, right angle clevis 54, double yoke 55
, two horizontal insulator chains 56, a socket link 57, a right angle clevis 58, and a double yoke 59 are connected to form two horizontal sets.
A pair of right angle clevises 61, 61 and right angle clevis links 62, 62, which are located on the axis of both insulator link mechanisms, connect both ends of the multi-conductor retaining yoke 63.

The multi-conductor retaining yoke 63 is connected to the uppermost horizontal yoke.
64, upper middle horizontal yoke 65, middle horizontal yoke
The fixed yoke has a welded structure in which the yoke portion 66, the lower middle horizontal yoke portion 67, the lowermost horizontal yoke portion 68, and the two vertical yoke portions 69, 69 are combined and welded in a grid pattern. - It's ku. Both ends of the center stage horizontal yoke part 66 are connected to the right angle clevis links 62, 62 as described above, and both ends of the other horizontal yoke parts 64, 65, 67, 68 are connected to the conductor side. Tension clamps 76 are connected via right angle clevis 70, vernier fitting 71, right angle clevis link 72, parallel clevis link 73, right angle clevis link 74, and special parallel clevis link 75, but the amount of protrusion of tension clamp 76 is Vernier fittings 71 to make it longer as it goes to the bottom.
A parallel clevis link 77 is interposed at the upper middle stage, a parallel clevis link 78 is interposed at the lower middle stage, and parallel clevis links 77 and 78 are interposed between the right angle clevis link 72 and the right angle clevis link 72.

0004

[Problem to be Solved by the Invention] The multi-conductor retaining yoke in this type of multi-conductor tension insulator device has a large bundle diameter of the multi-conductors, so it is difficult to prevent the device from rotating due to cross wind pressure acting on power transmission lines, etc. The moment is large, and the metal fittings constituting the device are also large. To cope with this, a fixed yoke is formed by combining a large number of yoke members in a lattice shape and welding them together.

[0005] For this reason, in addition to inefficient welding work, manufacturing a multi-conductor retaining yoke requires a great deal of labor and effort to weld the corners of the grid, which is difficult, and to perform quality control of the welded parts. There are disadvantages in that it takes time and production costs rise. Furthermore, the multi-conductor tie-down yoke is large and heavy, making it difficult to handle, especially when carrying it into and installing it on towers in mountainous areas, installing locking tools for tensioning cables, and other high-altitude work. becomes extremely difficult. Moreover, in recent years, not only has the number of young workers joining the company sharply decreased, resulting in a labor shortage, but also the average age of workers has increased, and multi-conductor detention yokes have become increasingly larger in proportion to the aging of workers. Due to their heavy weight, the situation has become serious, such as a decline in work efficiency, a prolongation of the construction period, and a rise in overhead line construction costs, and drastic countermeasures are desperately needed.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a multi-conductor tension insulator device that facilitates the production, handling, and transportation of a multi-conductor retaining yoke.

[0007]

[Means and operations for solving the problems] In the multi-conductor tension insulator device of the present invention, the parallel insulator chain mechanism 10,
A pair of vertical yokes 1 to a horizontal yoke 12 connected to 10
7 and 17 are connected via right angle clevises 16 and 16, and tension clamps 1 are installed above and below the pair of vertical yokes 17 and 17.
The conductor-side horizontal yoke portion 21 connecting the pair of connecting metal chains 20, 20 connected with each other is horizontally connected via a pair of right-angled clevises 18, 18 in number equal to 1/2 of the number of stretched conductors. The spacing between the connecting points 24, 24 of both the left and right connecting metal fittings of the conductor-side horizontal yoke portion 21 and the vertical spacing of the adjacent conductor-side horizontal yoke portions 21, 21 are made equal to the corresponding spacing of the stretched conductor. There is. Therefore, as shown in Fig. 3, a pair of vertical yaws
The clevises 17, 17 and the large number of horizontal yokes 21 on the conductor side perpendicular thereto have a three-dimensional structure with right-angled clevises 18, 18, so as to resist the torsional load acting on the jumper wire due to wind pressure, etc. Can be strengthened. Further, the lateral and vertical vibrations of the vertical yokes 17, 17 with respect to the horizontal yoke 12 are made uniform by the conductor-side horizontal yoke portion 21, and the free vibration of the multi-conductor to be held is restricted. The arrangement will not be significantly distorted. Note that the multi-conductor retaining yoke 13, which is made up of a horizontal yoke 12, a pair of vertical yokes 17, 17, and a plurality of conductor-side horizontal yokes 21 connected by right-angled clevises 16, 18, can be assembled and disassembled. This is a possible configuration.

Further, the parallel insulator link mechanisms 10, 10, a pair of links 11, 11 connecting the parallel insulator link mechanisms to the horizontal yoke 12, and the link connection points 14, 14 of the horizontal yoke 12
A pair of vertical yokes 17, 17 connected via a pair of right-angled clevises 16, 16 on a straight line 15 connecting 18, 18, a pair of connecting metal connecting points 24, 24 provided on a straight line 23 connecting the pair of right angle clevis connecting points 22, 22 of the conductor side horizontal yoke portion 21 are connected to the axis 25 of the tension insulator device. They are arranged symmetrically. Therefore, even if the tension insulator device oscillates laterally as shown in FIG. 4, the line of action of the resultant force of the conductor tension passes along the axis 25 of the tension insulator device
The parallel insulator link mechanisms 10, 10 share the conductor load equally.

Furthermore, a lock pin 27 for locking the vertical yoke 17 to the right angle clevis 16 is removably attached to the right angle clevis 16 that connects the vertical yoke 17 to the horizontal yoke 12. If the lock pin 27 is inserted, the wire can be tightened immediately, and when the wire tension is finished, the lock pin is removed.

0010

[Embodiment] An embodiment of the present invention will be explained based on the drawings. In FIGS. 1 and 2, reference numeral 1 denotes tension device mounting fittings attached to the steel tower arm 2 at predetermined intervals. Both tension device mounting brackets 1, 1 have a vernier bracket 3, a right angle clevis 4, a double yoke 5, and a double insulator chain 6, respectively.
, the socket link 7, the right angle clevis 8, and the double yoke 9 are successively connected to form a horizontal double insulator chain mechanism 10. Then, both ends of the horizontal yoke 12 are connected by parallel clevises 11, 11 located on the axes of the two insulator linking mechanisms 10, 10.

The multi-conductor detention yoke 13 is connected to the horizontal yoke 12.
, a pair of vertical yokes 17, 17 connected via a pair of right-angled clevises 16, 16 on a straight line 15 connecting the parallel clevis connection points 14, 14 of the horizontal yokes 12; As shown in FIG. 3, there is a conductor-side horizontal yoke connecting a pair of connecting fittings 20, 20 connected via right-angled clevises 18, 18 and connecting tension clamps 19, 19.
It consists of 21a, 21b, 21c, and 21d. Then, a pair of insulator link mechanisms 10, 10, a pair of parallel clevises 11, 11, a pair of vertical yokes 17, 17, and a pair of horizontal yokes 21 on the conductor side are attached to the pair of vertical yokes 17, 17. A pair of connection fitting connection points 24, 24 provided on a straight line 23 connecting the right angle clevises 18, 18 and the right angle clevis connection points 22, 22 of the conductor side horizontal yoke portion 21.
are arranged symmetrically with respect to the axis 25 of the tension insulator device.

The vertical spacing between the conductor-side horizontal yoke portions 21a, 21b, 21c, and 21d in the multi-conductor retaining yoke 13, and the spacing between the left and right connecting fitting connection points 24, 24 of each conductor-side horizontal yoke portion. are set equal to the corresponding intervals of the eight conductors arranged in a regular octagonal arrangement.

The right angle clevis 16 that connects the vertical yoke 17 to the horizontal yoke 12 has a pin 26 for rotatably attaching the vertical yoke 17, as well as a pin 26 that connects the vertical yoke 17 with the pin 26.
A lock pin 27 for preventing rotation is removably attached. Therefore, the conductor side horizontal yoke portion 21a,
In the double tension wire 21b, by inserting the lock pin 27, the wire can be tensioned without vertical movement of the vertical yoke 17 relative to the horizontal yoke 12, and when the tension is finished, the lock pin 27 is removed. Note that the lock pin 27 is not required when the horizontal yoke 12 and the vertical yoke 17 are integrally fixed using a tensioning locking tool (not shown).

Conductor side horizontal yoke portions 21a, 21b,
21c and 21d, in this embodiment, a parallel clevis 30, a vernier fitting 31, a right angle clevis 32, and a parallel clevis 33 are provided on each conductor side horizontal yoke part.
, right angle clevis link 34, special parallel clevis link 3
5, etc., but in order to increase the protrusion amount of the tension clamp at the lower stage, between the vernier fitting 31 and the right angle clevis 32,
Right angle clevis links 36 and 37 are interposed as appropriate.

It should be noted that the present invention is not limited to the embodiments illustrated, and can be modified in various ways within the scope of the gist. For example, in the parallel insulator chain mechanism 10, the insulator chain mechanism 10 is There may be three rows, or each insulator chain of the insulator chain mechanism may be directly connected to the horizontal yoke 12.

[0016]

[Effects of the Invention] Since the present invention is constructed as described above, it produces the following effects.

■ The multi-conductor anchoring yoke consists of one horizontal yoke, a pair of vertical yokes, a pair of vertical yokes, and 1/2 the number of conductor-side horizontal yokes as the number of stretched conductors. Since the parts are connected through right-angled clevises, welding is not required, making manufacturing easy and reducing manufacturing costs. Also, a pair of vertical yaws
The conductor-side horizontal yoke portion of three or more conductor-side horizontal yokes has a three-dimensional configuration with right-angled clevises, which can strengthen the resistance against torsional loads due to lateral vibration of the jumper wire, thereby reducing the weight of the yoke. Moreover, since the multi-conductor retaining yoke can be assembled and disassembled, it is easy to handle and carry. Therefore, it is useful for improving the work efficiency of overhead line work, shortening the construction period, and reducing overhead line work costs.

■ The right-angle clevis that connects the vertical yoke to the horizontal yoke is removably fitted with a lock pin for locking the vertical yoke to the right-angle clevis. The advantage is that the lock can be easily locked.

[0019] Since the parallel insulator linkage mechanism allows the conductor load to be equally distributed even if the tension insulator device oscillates laterally, it is possible to reduce the weight of the tension insulator device.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of an embodiment of the invention.

FIG. 2 is a partially cutaway side view of an embodiment of the invention.

FIG. 3 is an enlarged perspective view of essential parts of an embodiment of the present invention.

FIG. 4 is an explanatory diagram of conductor load distribution during lateral vibration of the device in the embodiment of the present invention.

FIG. 5 is a partially cutaway plan view of a conventional device.

FIG. 6 is a partially cutaway side view of a conventional device.

[Explanation of symbols]

10 Insulator chain mechanism 11 Link 12 Horizontal yoke 13 Multi-conductor detention yoke 14 Link connection point 15 Straight line 16 Right angle clevis 17 Vertical yoke 18 Right angle clevis 19 Tension clamp 20 Connecting metal fittings 21 Conductor side horizontal yoke part 22 Right angle clevis connection point 23 Straight line 24 Connecting metal connection connection point 25 Axis line 27 Lock pin

Claims (3)

[Claims] [Claim 1] In a tension insulator device designed to hold an even number of conductors of six or more conductors, a pair of vertical yokes are connected to a horizontal yoke connected to a parallel insulator chain mechanism through right-angled clevises. At the top and bottom of the pair of vertical yokes, there is a horizontal yoke on the conductor side that connects the pair of connecting fittings connected with tension clamps. The spacing between the connection points of both left and right connecting metal fittings on the horizontal yoke on the conductor side and the vertical spacing between adjacent horizontal yokes on the conductor side are made equal to the corresponding spacing of the stretched conductors. A tension-resistant insulator device for multi-conductors characterized by the following. [Claim 2] Claim 1, characterized in that the right angle clevis connecting the vertical yoke to the horizontal yoke is removably fitted with a lock pin for locking the vertical yoke to the right angle clevis. The multi-conductor tension insulator device described above. 3. A parallel insulator linkage mechanism, a pair of links connecting the parallel insulator linkage mechanisms to a horizontal yoke, and a pair of links connected via right-angled clevises on a straight line connecting the link connection points of the horizontal yokes. Vertical yokes, a pair of right angle clevises connecting the conductor side horizontal yokes to the pair of vertical yokes, and a pair of connections provided on a straight line connecting the pair of right angle clevis connection points of the conductor side horizontal yokes. 2. The tension insulator device for multi-conductor according to claim 1, wherein the metal fitting connection points are arranged symmetrically with respect to the axis of the tension insulator device.