Symmetrical arrangement force balance type tackle for paying-off with a pull walking board and three wires and pull walking board

Abstract

The invention relates to a tackle for paying-off and a pull walking board which can be used to ensure that the wires are symmetrically arranged and the stresses of the tackle and the walking board are balanced. The tackle is provided with a movable steel wire rope pulley and a movable wire pulley. When a hauling cable passes through the movable steel wire rope pulley of the tackle, the movable steel wire rope pulley is in the middle of the tackle so as to ensure that the stress of the tackle is balanced; when the pull walking board passes through the tackle, a guiding and pushing beam on the walking board is used to push the movable steel wire rope pulley and movable wire pulley on the tackle for paying-off to move a wheel-width distance, the movable wire pulley moves to the middle of the tackle, three wire pulleys on the tackle for paying-off are symmetrically arranged, and the three wire pulled by the pull walking board extends forward along the symmetrically arranged three wire pulleys, thus ensuring the stresses of the tackle for paying-off and the pull walking board are balanced. The tackle for paying-off and the pull walking board of the invention overcome the defects that the stresses of the general 'one-pull-three' tackle for paying-off and pull walking board are not balanced when wires are unfolded, the pull walking board and tackle for paying-off are easy to incline and overturn during construction, and the wires are intertwined.

Description

technical field [0001] The invention belongs to the field of equipment for tension stringing construction of overhead transmission lines, in particular to a pay-off block and a traction pallet, and in particular to a pay-off block and a traction pallet with symmetrically arranged and balanced force-bearing wires of "one pull three". Background technique [0002] The ±800kV UHV DC demonstration project uses six-split conductors. Due to the large cross-section of the conductors, the traction force of the existing six conductors is not enough for one tractor. The tractors perform the "one pull three" unfolding mode simultaneously). The existing "one pull three" pay-off pulley adopts a five-wheel arrangement (one wire rope pulley 4, and four guide pulleys are symmetrically arranged on both sides of the wire rope pulley), and only three of them are used during pay-off. Play a balancing role. Since two wires are arranged on one side of the wire rope wheel and one wire is arrange...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the unbalanced force of the general "one pull three" pay-off block and traction board during the wire unfolding process, which may easily cause the traction board, wire release block to overturn, and the wires to be entangled with each other, the invention proposes a "one pull" Three" conductors are symmetrically arranged with balanced force-bearing type pay-off block and traction board to ensure the traction board and pay-off block force balance in the whole process of "one lead three" wire unwinding, which facilitates on-site construction and improves construction efficiency

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