Semi-automatic rapid hand-changing lifting device

Abstract

The invention provides a semi-automatic quick hand-changing lifting device which comprises a hydraulic jack, wherein the hydraulic jack comprises a cylinder body and a piston rod, the outer wall of the cylinder body is provided with a plurality of first convex teeth and a plurality of rotating grooves, each rotating groove comprises two straight grooves and a spiral groove, and the two straight grooves are arranged in parallel in the vertical direction and are located at different heights; two ends of the spiral groove are respectively connected with the two straight grooves; a plurality of supporting pipe sections sleeving the cylinder body, wherein the inner wall of each supporting pipe section is provided with a plurality of second protruding teeth in the circumferential direction, the second protruding teeth correspond to the first protruding teeth one by one, a tooth groove is formed between every two adjacent second protruding teeth, and each supporting pipe section is further provided with a plurality of plug pin holes; and a plurality of bolts inserted into the corresponding rotating grooves through the bolt holes, wherein the cylinder body can rotate by a set angle when ascending or descending. The semi-automatic rapid hand-changing lifting device provided by the invention not only can meet the requirements of the working condition of the lifting or descending operation of a heavy object with a larger height, but also can reduce the amount of auxiliary measures to the greatest extent and reduce the labor intensity.

Description

technical field [0001] The invention relates to the technical field of hoisting and installation, in particular to a semi-automatic fast hand-changing lifting device. Background technique [0002] In the field of hoisting and installation, hydraulic jacks are commonly used to lift or lower heavy objects, but for lifting or lowering to a greater height, due to the limited stroke of the hydraulic jack, it must be realized through multiple hand changes. At present, the conventional methods of changing hands include ectopic handover and same-position handover. Heterotopic handover increases or decreases the pier under the hydraulic jack to increase the jacking height of the hydraulic jack, and at the same time, it is necessary to increase the counterweight of the handover pier It requires a lot of manpower and material resources, and the labor intensity is very high, the safety is low and the operation efficiency is low. However, the current method of changing hands in the same...

AI Technical Summary

Problems solved by technology

At present, the conventional handover methods include out-of-position handover and in-position handover. Out-of-place handover increases or decreases the pier under the hydraulic jack to increase the lifting height of the hydraulic jack, and at the same time, it is necessary to increase the counterweight of the handover support It requires a lot of manpower and material resources, and the labor intensity is very high, the safety is low and the operation efficiency is low.

However, the current method of changing hands in the same position and adding joints to jacking up has greatly improved the above problems, but if the jacking height is too high, the stability of the support will be deteriorated, and the risk is still high.

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