JPH0621134Y2 - Large bundle diameter multiconductor transmission line insulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a tension insulator device for a large bundle diameter multiconductor power transmission line used for a multiconductor AC power transmission line.

[Conventional technology]

To increase the transmission capacity of the transmission line, increase the transmission voltage,
Although it is customary to increase the current capacity of the transmission line,
Recently, a multiconductor AC power transmission line has been proposed in which the transmission capacity is increased by increasing the distance D between the conductors 61 to reduce the inductance of the line as shown in FIGS. 4 and 5. A large bundle diameter multi-conductor transmission line tension insulator device 62, 62 used in this multi-conductor AC transmission line
Is a parallel link 6 as shown in FIGS. 6 and 7, for example.
Vertical yokes connected to the left and right ends of the horizontal yoke portion 65 connected to the tower arm (not shown) via the 3, 63, and insulator linkage mechanisms 64 and the like and the right-angled clevis 66, 66 to the horizontal yoke portion 65. A large bundle diameter 6 conductor in which the conductor 61 is retained at the upper and lower ends of the parts 67, 67 via a connecting metal fitting 68 and a tension clamp 69, respectively, and the bundle diameter of 6 conductors (diameter of a circle passing through the center of multiple conductors) becomes large. The transmission line was stretched.
Reference numeral 70 shown in FIG. 4 is a spacer for keeping the conductor interval.

[Problems to be solved by the device]

By the way, an electric wire side retention yoke 60 for retaining a large bundle diameter 6-conductor transmission line includes a horizontal yoke portion 65 and a pair of vertical yoke portions 6 connected to the horizontal yoke portion 65 via a pair of right-angled clevis 66, 66.
Since it is composed of 7, 67, it is large and heavy. For this reason, there is a disadvantage that it is difficult to carry in the steel tower in the mountainous area, attach it to the steel tower, perform the tension work, and perform work in high places.
Moreover, since the horizontal yoke portion 65 and the vertical yoke portion 67 are connected through the right-angled clevis 66, it is not possible to sufficiently increase the resistance against the torsional load due to the wind pressure of the jumper wire, There were difficulties such as lengthening.

The present invention has been made in view of the above points, and provides a tensile insulator device for a large bundle diameter multi-conductor power transmission line, which has a short device length and can make the electric wire side detention yoke rigid and convenient for transportation. With the goal.

[Means for Solving the Problems]

In order to achieve this object, in the tension insulator device for a large bundle diameter multi-conductor power transmission line of the present invention, the wire side pulling yoke connected to the tower arm via a plurality of insulator connection mechanisms is connected to the wire side retention yoke via a tension clamp. In a large-strand-diameter multiconductor transmission wire tension insulator device in which a large-bundle-diameter multiconductor is attached, the wire-side detention yoke is provided with two symmetrically arranged detention yoke parts and these detention yoke parts can be used to attach the large-bundle-diameter multiconductor. In addition, it is configured with an expansion metal fitting that detachably connects both detention yoke parts, and the steel tower arm connection point interval of the insulator linkage mechanism directly connected to each detention yoke part is narrower than the wire side detention yoke connection point interval. It is what

The wire-side detention yoke has a large torsional rigidity by being formed into a frame shape with two detention yoke portions and a plurality of expansion metal fittings. Further, in the case of four insulator connecting mechanisms, a square array is formed by connecting the insulator connecting mechanisms to the upper and lower portions of the respective pulling yoke portions.

[Action]

The insulator connecting mechanism 12, 12 directly connected to the electric wire side pulling yoke 1 for holding the large bundle diameter multi-conductor has the steel tower arm connecting point 42,
Since the interval of 42 is narrower than the interval of the pulling yoke connecting points 11 and 11, the large bundle diameter multiconductor can be stretched without increasing the tower arm length. Since the wire-side detention yoke 1 has a configuration in which the two detention yoke portions 2 and 2 are detachably connected by the expansion metal fittings 3 and 3 so that a large bundle diameter multiconductor can be attached by the two detention yoke portions 2 and 2. In addition to being lightweight and compact, the tension clamp clamping points 9a, 9b, 9c can be set on the same vertical surface, and the frame shape makes it possible to withstand the torsional load acting by the wind pressure of the jumper wire. On the other hand, it can have sufficient rigidity. Since the four porcelain insulator linkage mechanisms 12 connect the porcelain insulator linkage mechanisms 12 to the upper and lower sides of the respective pulling yoke portions 2, it is less likely to cause snowfall than the horizontal four porcelain insulator linkage mechanism.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

1 to 3, in the wire-side detention yoke 1, a pair of bilaterally symmetrical detention yoke portions 2 and 2 have bolts 4 and 4, respectively, via upper and lower ends via expansion metal fittings 3 and 3, respectively. The nuts 5 and 5 are detachably connected together. The pulling yoke portions 2 and 2 extend from the upper and lower ends of the vertically long frame body 6 toward the same side, respectively, and from the middle central position of the vertically long frame body 6 toward the opposite side of the protrusion portion 7. Protruding protruding parts 8 are provided, and tension resistant clamp anchoring points 9a, 9b, 9c are provided on the protruding parts 7, 7 and 8 on the same vertical plane, and a pair of anchoring yoke parts 2 and 2 are provided by expansion metal fittings 3 and 3. When they are integrally connected, a regular hexagonal array is formed at the six tension clamp pulling points. An intermediate central position of the vertically long frame body 6 is reinforced by a reinforcing rib 10, and the retaining yoke portion 2 is provided on the insulator rib side of the reinforcing rib 10.
The insulator coupling mechanism connecting point 11 is provided on the extension line of the moment balance position due to the conductor tension acting on the three tension clamp anchoring points 9a, 9b, 9c.

A right angle clevis 15 is attached to each of the tension resistant clamp anchoring points 9a, 9a for the upper wire located at the upper end of the wire side anchoring yoke 1.
Single link 16, parallel clevis 17, vernier metal fitting 1
8, tension clamp 20 through parallel clevis link 19
To connect the cable, and the tension point of the tension clamp for middle and underline 9
b, 9b, 9c, and 9c are provided with the above-mentioned connecting metal fittings between the tension clamp 20 and the parallel clevis 17 respectively.
And the vernier metal fitting 18 are a single link 21 and a parallel link 2
2 and the vernier metal fitting 18 and tension clamp 2
0 is connected with a single link 23 and a parallel clevis 24,
Further, the underline-side single links 16 and 23 are made longer than the midline-side single links 16 and 23 by a predetermined length, so that
The upper and lower intervals of the jumper wires suspended on the tension-resistant clamps 20, 20, 20 for the middle wire and the under wire are maintained at a predetermined interval.

Each insulator connection mechanism connection point 11, 11 of the wire-side detention yoke 1 is connected to the steel tower arm 40 via the insulator connection mechanism 12, 12. The insulator linkage mechanism 12 is an insulator linkage mechanism connection point 1 of a pair of protrusions 30 and 30 protruding from the center intermediate position of the vertically long frame body 6.
1, the support shaft 26 is attached horizontally, and the connection fitting 25 is attached to the support shaft 26 so as to be vertically rotatable.
The single link 27, the horn mounting bracket 28, the parallel socket link 29, the insulator string 31, the ball link 32, the right clevis 33, the horn mounting bracket 34, the right clevis 35, the vernier bracket 36, the single link 37, and the parallel clevis 38. It is made by connecting right-angled clevis links 39 via
A right angle clevis link 39 is connected to the steel tower arm 40.

Since the distance between the steel tower arm connecting points 42, 42 of the insulator connecting mechanism 12, 12 is narrower than the distance between the wire-side pulling yoke connecting points 11, 11, the two insulator connecting mechanisms 12, 12 are arranged in a C-shape. Steel tower arm 40 for stretching a large bundle of 6 conductors
There is no need to increase the length of.

In this embodiment, a large bundle diameter of 6 conductors is stretched. However, when an even number of conductors of a large bundle diameter of 8 conductors or more is stretched, protrusions corresponding to the number of conductors to be attached to each of the pulling yoke portions 2 are projected. Will be done. For example, in the case of 8 conductors, four protrusions are provided on each of the vertically long frame bodies 6 at predetermined intervals, and the tension clamp tension points of the protrusions are selected so as to form a regular octagonal arrangement. Further, in this embodiment, the protruding portions 7, 7, 7, which protrude from the upper and lower ends of both the pulling yoke portions 2, 2,
7 are connected to each other with bolts 4 and nuts 5 through one piece of expansion metal fitting 3, but two protruding metal fittings 3 and 3 may be used to sandwich the protruding portion 7 from above and below, or both ends of the expansion metal fitting may be connected. The protrusions may be eliminated by directly connecting them with bolts and nuts so as to be fitted in the vertically long frame body 6, and the tension clamp tension points 9a, 9a, 9c, 9c may be provided on the expansion metal fittings, and other appropriate known connecting means. Can be adopted. The electric wire side detention yoke 1 is connected to the steel tower arm 40 by the four porcelain insulator mechanisms 12.
In the case of mounting on the upper and lower ends of each of the pulling yoke portions 2, the insulator connecting mechanism 12 is connected to the steel tower arm 40 either directly or via a vertical yoke, and the upper two stations and the lower two stations of the c-shaped array are connected. Can be arranged in parallel.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

The wire-side detention yoke is configured so that both detention yoke parts can be detachably connected with expansion metal fittings so that a large bundle diameter multi-conductor can be attached to the two detention yoke parts. It is easy to carry in and saves space for storage.

The tension clamp of the wire side pulling yoke can be set on the same vertical plane. Since the insulator linkage mechanism is directly attached to the pulling yoke part, the vertical yoke and the horizontal yoke are connected via a right angle clevis. The length of the transmission line tension insulator device can be shortened as compared with the conventional device in which the insulator connecting mechanism is connected to the wire-side retention yoke via the yoke. Further, the distance between the steel tower arm connecting points of the insulator connecting mechanism directly connected to the pulling yoke portion can be made narrower than the distance between the wire side pulling yoke connecting points, so that the steel tower arm length can be shortened.

Since the wire-side detention yoke can be configured in the shape of a frame with two detention yoke portions and a plurality of expansion metal fittings, it can have sufficient rigidity against a torsional load due to the wind pressure of the jumper wire, and the four-row decompression yoke. In the insulator connecting mechanism, it is possible to form an array in which it is difficult to cover snow, that is, a square array or a square array, by only directly connecting the insulator connecting mechanisms to the upper and lower sides of the respective pulling yoke portions.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a side view with the same parts omitted, FIG. 3 is a front view with the same parts omitted, and FIG. 4 is a partial omission of a conventional 6-conductor AC transmission line. 5th plan view
FIG. 6 is a plan view of the same 6-conductor arrangement, FIG. 6 is a plan view of a conventional large-diameter 6-conductor transmission-strand insulator device for transmission lines, with some parts omitted, and FIG. 7 is a side view with the same parts omitted. 1 ... Detention yoke on the wire side, 2 ... Detention yoke part, 3 ...
… Expansion metal fittings, 12 …… Insulator linkage mechanism, 20 …… Tension resistant clamp, 40 …… Steel tower arm.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Matsujiro Yamazaki 13-1 Isoshimaminami-cho, Hirakata-shi, Osaka Inside the Nippon Malleable Iron Works Co., Ltd. (56) Reference JP-A-4-56016 (JP, A) JP-A 4-56017 (JP, A) JP-A-4-87114 (JP, A) JP-A-3-192617 (JP, A) Actually open 51-48700 (JP, U) Actually open 50-147198 (JP, U)

Claims (3)

[Scope of utility model registration request] Claim: What is claimed is: 1. A large bundle diameter multiconductor transmission wire reinforced insulator in which a large bundle diameter multiconductor is attached to an electric wire side pulling yoke connected to a steel tower arm via a plurality of insulator connection mechanisms via a coupling metal string and a tension clamp. In the device, the wire-side detention yoke is composed of two symmetrical detention yoke parts and an expansion metal fitting that detachably connects both detention yoke parts so that a large bundle diameter multiconductor can be attached to these detention yoke parts. A tension insulator device for a large bundle diameter multi-conductor power transmission line, characterized in that an interval between steel tower arm connecting points of an insulator connecting mechanism directly connected to each of the pulling yoke portions is narrower than a wire side pulling yoke connecting point interval. 2. The tension insulator device for a large bundle diameter multi-conductor power transmission line according to claim 1, wherein the wire-side retaining yoke is frame-shaped by two retaining yoke portions and a plurality of expansion metal fittings. 3. A tension insulator device for a large bundle diameter multi-conductor power transmission line according to claim 1, wherein insulator connecting mechanisms are respectively connected to the upper and lower sides of each of the pulling yoke portions.