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Construction method for parallel suspension of lead trolleys by using V-shaped strings

A construction method and technology of pay-off pulleys, which are applied in the direction of overhead lines/cable equipment, etc., can solve the problems of easy swing of wire pulleys, wire damage to wires, and increased construction difficulty, so as to reduce construction difficulty, reduce workload, and improve construction. The effect of construction period and work efficiency

Inactive Publication Date: 2011-10-05
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. When the wire block is suspended, because the steel wire rope cover is used for V-shaped suspension, it is necessary to purchase and process a large number of steel wire rope covers, which increases the construction cost
[0007] 2. During the wire laying process, when the rope is threaded into the wire pulley groove, because the wire pulley is easy to swing, the construction personnel have no focus, and the construction is difficult, which is not conducive to construction
[0008] 3. In the process of wire laying, this construction method is easy to cause the wire to jump because of the swing of the wire block, which increases the difficulty of construction.
[0009] 4. During the wire laying process, due to the inevitable time difference between the two sets of stretching equipment during the traction process, the wire pulley swings irregularly from front to back, left, and right, which may easily cause the whipping of the wire and damage the wire

Method used

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  • Construction method for parallel suspension of lead trolleys by using V-shaped strings
  • Construction method for parallel suspension of lead trolleys by using V-shaped strings
  • Construction method for parallel suspension of lead trolleys by using V-shaped strings

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Embodiment Construction

[0028] Refer to attached Figure 1-5 As shown, a V-shaped string wire block of the present invention is suspended side by side construction method, the method adopts a Φ22 round steel connecting rod 1, two -20 three-hole connecting plates 2 to synthesize insulator V-shaped string 3 and two three-wheel The wire pay-off block 4 is connected into an integral suspension construction method.

[0029] The hanger for implementing the V-shaped string wire pulley parallel suspension construction method, the hanger wherein the main parts include: V-shaped metal fittings string Φ22 round steel connecting rod 1, two -20 three-hole connecting plates 2.

[0030] refer to Figure 5 As shown, the force calculation and analysis of each force point of the parallel suspension of the V-shaped string wire block,

[0031] Taking the tower position with the largest vertical span of the line as an example for force analysis:

[0032] The maximum vertical span of the tower position in the bidding s...

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Abstract

The invention relates to a method for construction, maintenance and repairing of transmission and transformation lines in power engineering, in particular to a construction method for parallel suspension of lead trolleys by using V-shaped strings, which is characterized in that the V-shaped strings of composite insulators and two three-wheel lead wire releasing trolleys are connected into a whole by a Phi 22 circular steel connecting rod and two -20 three-hole linkage plates. A hanging tool for implementing the construction method for parallel suspension of lead trolleys by using V-shaped strings is characterized by mainly comprising the Phi 22 circular steel connecting rod for V-shaped strings, and two-twenty three-hole linkage plates. The construction method for parallel suspension of lead trolleys by using V-shaped strings, disclosed by the invention, can be widely applicable to the construction method of suspending lead trolleys by using V-shaped strings in the construction of 660 kv and above large-cross multi-split conductors with 2*' ONE Pulling Two', 2* 'One Pulling Two and One Pulling Four' and 2* 'One Pulling Four' tension wirings.

Description

[0001] technical field [0002] The invention relates to the construction, maintenance and overhaul of power transmission and transformation lines in electric power engineering, and a construction method for parallel suspension of V-shaped string wire pulleys. Background technique [0003] With the development of my country's electric power industry, the voltage level of UHV overhead transmission lines is constantly increasing, and the cross-sectional area of ​​the erected conductors is also increasing with the increase in electricity consumption. In order to reduce the uneven creep of the conductors during long-term operation , according to "1000mm 2 According to the "Guidelines for Tension Stringing Construction Technology of Overhead Power Transmission Lines", in the tension stringing construction, the construction technology requirements of synchronous deployment and simultaneous tightening of the sub-conductors of the same phase are required. [0004] For construction i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02
Inventor 李长贵牛鑫江波
Owner STATE GRID CORP OF CHINA
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