Hydraulic device for insulator replacing tool

Abstract

Provided is a hydraulic device for an insulator replacing tool. A cylinder body is composed of a front cylinder body and a back cylinder body, an inner barrel is arranged in an outer barrel, an annular oil tank is formed between the inner barrel and the outer barrel, a piston separates the inner barrel into a front cavity and a back cavity, the annular oil tank is communicated with the back cavity through a back cylinder body oil duct, a pressure spring is arranged in the back cavity and between the back cylinder body and the piston, an oil pressing channel, an oil sucking channel, an oil return channel and a decompression channel are arranged on the front cylinder body, the oil pressing channel is used for communicating a pump body cavity of a stirrup pump and the front cavity, the oil sucking channel is used for communicating the pump body cavity of the stirrup pump and the annular oil tank, the oil return channel is communicated with the front cavity, the decompression channel is communicated with the annular oil tank, an oil pressing check valve and an oil sucking check valve are respectively arranged in the oil pressing channel and the oil sucking channel, and a one-way throttle valve is arranged between the oil return channel and the decompression channel. The hydraulic device is compact and simple in structure and convenient to operate, adopts the one-way throttle valve in a gap throttling mode to automatically control flow of returned oil, can slowly decompress, and achieve stroke fine tuning of the hydraulic device.

Description

technical field [0001] The invention relates to a hydraulic device for an insulator replacement tool. Background technique [0002] In overhead high-voltage transmission lines, insulator strings are used to tension and insulate the high-voltage wires on both sides of the iron tower. Long-term use of insulator strings will cause aging damage and need to be replaced in time, otherwise it will affect high-voltage transmission and safety. The currently used insulator replacement tool consists of two tensioners and two jigs connected to the front and rear ends of the two tensioners respectively. The insulator string is clamped between the two fixtures, the tensioner drives the screw to shrink through the screw drive, the tension force exerted by the wire on the insulator string is transferred to the two tensioners, and the insulator string is loose, so that the insulator string can be disassembled . China's authorized announcement number is CN 101174761B (application number 20...

AI Technical Summary

Problems solved by technology

When the insulator replacement tool is used, it needs to withstand the tension in the line, and the rotation of the screw requires a lot of torque. At present, the rotation of the screw is manual, and the operation is laborious and inconvenient. Therefore, a hydraulic tool is currently being developed. Insulator replacement tool for installation

The insulator replacement tool is a high-altitude tool, and the hydraulic device applied to the insulator replacement tool is required to be easy to operate. At present, there is no suitable hydraulic device

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