Semi-automatic quick hand change lifting device

Abstract

The invention provides a semi-automatic fast hand-changing lifting device, comprising: a hydraulic jack, including a cylinder body and a piston rod, the outer wall of the cylinder body is provided with a plurality of first protruding teeth and a plurality of rotating grooves, and each rotating groove includes two A straight groove and a spiral groove, the two straight grooves are arranged in parallel vertically and at different heights, the two ends of the spiral groove are respectively connected to the two straight grooves; several support pipe joints are sleeved outside the cylinder body, each support The inner wall of the pipe section is provided with a plurality of second protruding teeth along the circumference, the second protruding teeth correspond to the first protruding teeth one by one, and a tooth groove is formed between two adjacent second protruding teeth, and each supporting pipe section A number of pin holes are also arranged on the top; a number of pins are inserted into the corresponding rotation grooves through the pin holes, so that the cylinder body can be rotated to set an angle when it rises or falls. The semi-automatic fast hand-changing lifting device provided by the invention can not only meet the requirements of the working conditions of lifting or lowering heavy objects with a relatively high height, but also can minimize the amount of auxiliary measures and 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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