JP2003037924A - Reverse v double suspension equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a deformation of a reverse double suspension equipment even when one power line is pulled up. SOLUTION: In the reverse V double suspension equipment in which a paired insulator strings is formed in a reverse V shape, suspension clamps which support the power line though a connection fitting are arranged respectively at the bottom of each insulator string, and a coupling rod which supports the connection fittings in the predetermined interval is installed between those connection fittings, length of the each connection fitting and the coupling rod is determined to satisfy the condition shown by a following formula, |α1 |>|α3 |>|α2 | Here, α1 is a electric wire catenary angle at one side of the connection fittings, α2 is an electric wire catenary angle at the other side of the connection fittings and α3 is an angle between the power line strained between both suspension clamps and the horizontal line.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverted V-hanging double suspension system, and more particularly to a case where a wire catenary angle on one side of a span is raised. About what you did. 2. Description of the Related Art FIG. 2 is a front view of a conventional inverted V-suspended double suspension system. In FIG. 2, reference numerals 1a and 1b denote insulator trains, and upper portions of the insulator trains 1a and 1b are attached to a yoke 3 provided on a not-shown arm of a power transmission tower via connection fittings 2 and the like. I have. Further, suspension clamps 5a and 5b are attached to lower portions of the insulator rows 1a and 1b via connecting fittings 4'a and 4'b, respectively. In FIG. 2, reference numeral 6 'denotes a connecting rod, and both ends of the connecting rod 6' are attached to connecting metal fittings 4'a and 4'b, respectively, so that a pair of insulators 1a and 1b are connected. It is held in a predetermined inverted V-shape. [0003] In the inverted V-suspended double suspension device having the above structure,
When the transmission line L is placed and mounted on both the suspension clamps 4a, 4b, the transmission line L is stretched on a transmission line tower (not shown). [0004] However, in the above-mentioned conventional inverted V-suspended double-suspension system, when the wire catenary angle of each of the pair of insulator trains is equal, the pair of insulator trains has a predetermined inverted V. The transmission line can be evenly supported by a pair of insulators, but due to the topography at the location of the transmission line tower,
When the wire catenary angle on one insulator side is raised, there is a disadvantage that the inverted V-shape of the pair of insulator rows is broken and an uneven load is applied to the other insulator row and the fittings. Further description will be given with reference to FIGS. 2 and 3.
In FIG. 2, when the wire catenary angle on one insulator train 1b side is pulled up in the direction shown by the arrow A, as shown in FIG. A compressive force is applied to the insulator ream 1b to loosen the insulator ream 1b. As a result, not only all the weight is applied to the remaining insulator ream 1a, but also the fittings (2, 3, 4'a,
4'b, 6 ') also has the disadvantage that an eccentric load is applied. [0006] Further, as described above, the pair of insulators 1a, 1
If the inverted V-shape of b is distorted and the insulator string 1b is slackened, a predetermined horn interval cannot be maintained, resulting in an electrical trouble. Therefore, the present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a method in which a pair of insulator reams has a predetermined angle even if there is a pull-up wire catenary angle on one insulator ream side. An object of the present invention is to provide an inverted V-suspended double suspension device capable of maintaining an inverted V-shape. [0008] In order to achieve the above object, the inverted V-suspended double-suspension system according to the present invention has a pair of insulators formed in an inverted V-shape, and each of the insulators has an inverted V-shape. In an inverted V-suspended double suspension apparatus, a suspension clamp is provided at a lower portion for supporting a transmission line via a connection fitting, and a connection rod is provided between the connection fittings to hold the connection fittings at a predetermined interval. The length of the connection fitting and the connection rod is determined so as to satisfy the following condition. | Α1 |> | α3 |> | α2 | where α1 is the wire catenary angle of one of the insulators, α2
Is the cable catenary angle on the other insulator side, and α3 is the angle at which the transmission line stretched between the two suspension clamps becomes a horizontal line. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an inverted V according to one embodiment.
It is a front view of a suspension double suspension apparatus. The same components as those in FIGS. 2 and 3 are described using the same reference numerals. In FIG. 1, reference numerals 1a and 1b denote insulator trains, and upper portions of the insulator trains 1a and 1b are connected to a yoke 3 provided via a connecting fitting 2 to an arm of a power transmission tower (not shown). Installed. In addition, suspension clamps 5a and 5b are attached to lower portions of the insulator rows 1a and 1b via connection fittings 4a and 4b, respectively. In FIG. 1, reference numeral 6 denotes a connecting rod, and both ends of the connecting rod 6 are attached to connecting metal fittings 4a and 4b, respectively, and a pair of insulator strings 1a and 1b are formed in a predetermined inverted V-shape. The shape is held. In the inverted V-suspended double suspension device having the above-mentioned structure,
When the transmission line L is placed and mounted on both the suspension clamps 4a, 4b, the transmission line L is stretched on a transmission line tower (not shown). In FIG. 1, the power transmission line L on the side of the insulator ream 1b located on the left side is in a pulled up state. Also,
Is the center position of the yoke 3 (the mounting position of the connection fittings 2)
Is a vertical line passing through. [0012] Even when the power transmission line L on one insulator train 1b side is in a pulled-up state, the connection fittings 4a, 4b are so arranged that the pair of insulator trains 1a, 1b can maintain a normal predetermined inverted V-shape.
The length of the connecting rod 6 is determined so as to satisfy the following condition. | Α1 |> | α3 |> | α2 | where α1 is the wire catenary angle of one of the insulators, α2
Is the cable catenary angle on the other insulator side, and α3 is the angle at which the transmission line stretched between the two suspension clamps becomes a horizontal line. When the connecting fittings 4a and 4b and the connecting rod 6 are configured to have a length satisfying the above formula, a pair of insulators 1a, 1a,
1b can evenly share the load,
The pair of insulator strings 1a and 1b can maintain a normal predetermined inverted V-shape. For this reason, the horn interval can be maintained at a predetermined interval, and the fittings (2, 3, 4a, 4
b, 6) can be effectively prevented from being applied with an unbalanced load. According to the present invention, the inverted V-suspended double suspension system according to the present invention has a pair of insulator series formed in an inverted V-shape, and supports a transmission line at a lower portion of each insulator series via a connecting fitting. In an inverted V-suspended double suspension device having a suspension clamp and a connecting rod for holding the connecting metal at a predetermined interval between the connecting metal, the length of each of the connecting metal and the connecting rod is determined by a predetermined formula. , The horn interval can be maintained at a predetermined interval even when the transmission line on one of the insulators is in a raised state, and the eccentric load on metal fittings is effectively prevented. can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an inverted V-hanging double suspension device according to an embodiment of the present invention. FIG. 2 is a front view of a conventional inverted V suspension double suspension device. FIG. 3 is a reference diagram when a transmission line on one insulator side of a conventional inverted V-hanging double suspension system is in a pulled state. [Description of Signs] 1a, 1b insulator series 2 connecting fittings 3 yokes 4a, 4b connecting fittings 5a, 5b suspension clamps 6 connecting rods L transmission lines α1, α2 catenary angle

Claims (1)

Claims: 1. A pair of insulator reams are formed in an inverted V-shape, and suspension clamps for supporting transmission lines are provided below connection insulators via connection fittings, respectively, and the connection fittings are provided. In the inverted V-hanging double suspension apparatus provided with connecting rods for holding the connecting metal fittings at a predetermined interval, the length of each of the connecting metal fittings and the connecting rod is determined so as to satisfy the following condition. An inverted V-hanging double suspension device, characterized in that: | Α1 |> | α3 |> | α2 | where α1 is the wire catenary angle of one of the insulators, α2
Is the cable catenary angle on the other insulator side, and α3 is the angle at which the transmission line stretched between the two suspension clamps becomes a horizontal line.