Internal circulation hydraulic telescopic cylinder

Abstract

The invention discloses an internal circulating type hydraulic telescoping cylinder which comprises a cylinder barrel, a plunger pump, a handle, a one-way valve, a reversing valve, a hydraulic lock and a first piston rod. The cylinder barrel comprises a rod cavity and a rodless cavity. The first piston rod does piston motion in the rod cavity of the cylinder barrel. One side of the rod cavity of the cylinder barrel communicates with the plunger pump through a plunger. The free end of the plunger pump is connected with the handle. The rod cavity of the cylinder barrel is provided with the one-way valve, the reversing valve and the hydraulic lock. According to the telescoping cylinder, hydraulic oil internal circulation is adopted, a compensator is arranged internally, a cylinder main body is made of a high-strength aviation aluminum material, the internal embedded type internal cylinder barrel is made of high-quality steel, the size is small, the weight is low, the pressure maintainingtime is long, oil does not need to be supplemented after long-time use, and the telescoping cylinder is convenient to carry and operate, long in service life, and free of the influence of external temperature and moisture.

Description

technical field [0001] The invention belongs to the technical field of maintenance of high-altitude ultra-high voltage lines, and relates to an internal circulation hydraulic telescopic cylinder. Background technique [0002] At present, clamps and tightening devices are used when replacing porcelain bottles during high-altitude operations in electric power construction. Due to the large tension between the wire and the porcelain bottle, with the increase of the voltage level, the tonnage of the ordinary screw is not enough, and it is laborious, which cannot meet the construction requirements; The instantaneous impact force on the conductors during pressure relief not only damages the pole tower, but also seriously affects the life safety of operators, and the expansion and contraction scale of the piston rod cannot be effectively controlled during pressure relief. The volume and weight of oil cylinders with pressure maintenance are relatively large, and they are basically ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an internal circulation hydraulic telescopic cylinder, which solves the problem that the impact force of the existing hydraulic cylinder on the pole tower and the personnel at the moment of reversing and releasing the pressure can not effectively control the expansion and contraction scale of the piston rod.

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