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Disconnection method and device for obtaining exact off-line length of conductor of overhead transmission line

A technology for overhead transmission lines and wires, applied in the direction of overhead lines/cable equipment, etc., can solve problems such as line length variation, instability, and repeated adjustment of wire sag, to eliminate extrusion deformation, ensure stability, and shorten consumption. Effect of creep treatment time

Active Publication Date: 2013-08-07
HENAN POWER TRANSMISSION & TRANSFORMATION CONSTR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for obtaining the accurate wire length of overhead transmission line conductors, so as to solve the problem of wire length changes, The technical problem that leads to wire sag needs to be adjusted repeatedly and is unstable

Method used

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  • Disconnection method and device for obtaining exact off-line length of conductor of overhead transmission line
  • Disconnection method and device for obtaining exact off-line length of conductor of overhead transmission line
  • Disconnection method and device for obtaining exact off-line length of conductor of overhead transmission line

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Embodiment 1

[0039] Embodiment 1 of the disconnecting device provided by the present invention to obtain the accurate hanging length of the overhead transmission line conductor is as follows:

[0040] Figure 1 to Figure 3 The shown disconnecting device for obtaining the accurate hanging length of the overhead transmission line conductor, the device includes a pay-off device and a traction machine 13 arranged at both ends of the head and tail for stretching the wire under tension. After the pay-off device, along the wire 1 In the direction of travel, a vibrating creep elimination station and a length measuring station are arranged in sequence, and two sets of vibrating creep eliminating devices 3 for online vibration and creep elimination of wires are arranged at the vibrating creep eliminating station; at the length measuring station, a length measuring device is arranged. And the tension measuring device 4 used to detect the tension of the wire measuring section, along the direction of t...

Embodiment 2

[0054] Embodiment 2 of the disconnecting device provided by the present invention to obtain the accurate hanging length of the conductor of the overhead transmission line is as follows:

[0055] Figure 5 The shown disconnecting device for obtaining the accurate hanging length of the overhead transmission line conductor, the difference between this device and the embodiment 1 is that the paying-off device 21 adopts a pay-off machine, and adopts a pay-off machine 21 and a wire take-up machine 22 to carry out Tension unwinding, the light reflector 6 of the laser range finder is fixedly connected with the imprint spraying device 7, and the main device 5 of the laser range finder is fixedly connected with the photoelectric sensor 9, because the wire take-up machine 22 adopted is A wire take-up machine capable of producing a larger tension force, so that the wire take-up machine can be used to implement super-tensioning and pre-stretching and anti-creep tension on the wire. In this...

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Abstract

The invention relates to a disconnection method and device for obtaining the exact off-line length of a conductor of an overhead transmission line. The disconnection method comprises the following steps: firstly eliminating plastic creep deformation of the conductor; and secondly when the conductor is spread horizontally, applying a tension force as same as an equivalent on-line tension force to the conductor in the axial direction of the conductor, measuring the length of the conductor under the tension force, marking or cutting off the conductor at a position on which the length of the conductor is the same as the on-line length, and obtaining the conductor, the completion sag of which is matched with a designed sag requirement, after the conductor is singly suspended under the specific working condition. According to the disconnection method and device disclosed by the invention, before the length of the conductor is measured and obtained, the permanent extension of the conductor caused by the plastic creep deformation is reduced to maximum; the completion sag of the obtained conductor after being mounted meets the designed sag requirement, the completion sag is relatively stable in the certain period during the operation of a later line, and the safety and the reliability of the line operation are improved.

Description

technical field [0001] The invention belongs to the technical field of stringing of high-voltage transmission lines, and in particular relates to a wire breaking method and a device thereof for obtaining accurate hanging lengths of conductors of overhead transmission lines. Background technique [0002] The traditional stringing method of overhead transmission line is tension stringing, which is to connect the wire with the running board through the traction net sleeve, and perform tension release. The sag must meet the design requirements, so after the wire is released, each tension section needs to be repeatedly tightened and sag observed, and then the length of the secant is calculated, and then the tension clamp is crimped at high altitude and the wire is hung . The construction process of this kind of wiring method is cumbersome, wastes wires and works at high altitude, resulting in long construction period and many hazards for safe operation, and it is inconvenient to...

Claims

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Application Information

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IPC IPC(8): H02G1/02
Inventor 刘万东金红专李君章张国志蔡伟梅志强姜锋涂长庚尚廷东张海霞贾洋
Owner HENAN POWER TRANSMISSION & TRANSFORMATION CONSTR CO LTD
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