Lifting appliance for hollow trapezoid concrete blocks

Abstract

The invention discloses a lifting appliance for hollow trapezoid concrete blocks in the technical field of hoisting. The lifting appliance comprises a lifting table, wherein the bottom of the lifting table is connected to a clamping mechanism through overlapping units, a limiting mechanism is arranged on the clamping mechanism, a plurality of overlapping units are arranged and are sequentially overlapped with one another, the clamping mechanism is connected to a centering mechanism, measuring mechanisms are arranged on the two sides of the lifting table, the bottoms of the measuring mechanisms are connected to the centering mechanism, and a climbing mechanism penetrating through the lifting table is arranged at the bottom of the lifting table; the hollow trapezoid concrete blocks can be conveniently lifted and sunk into the bottom of a river so that the hollow trapezoid concrete blocks can be laid on the bottom of the river end to end to form a Yangtze river channel for protecting the survival of fishes; and the lifting appliance can be used for lifting the hollow trapezoid concrete blocks.

Description

technical field [0001] The invention relates to a sling. Background technique [0002] As the largest and busiest inland waterway in the world, the Yangtze River is also an important gene bank of freshwater aquatic organisms. The Yangtze River has more than 4,300 species of aquatic organisms, including more than 400 species of fish, and more than 170 species are unique to the Yangtze River. 48% of the total number of fish. Herring, grass carp, silver carp, and bighead carp are called the "Four Major Fishes", and they are also the main fishing targets of my country's freshwater fishery. With economic development and the intensification of human activities, the current early resources of the "four major fish" have decreased by more than 90% compared with the 1980s, and the early resources of the "four major fish" such as eggs and fry have decreased compared with the 1980s More than 90%, the fishing output of the main stream of the Yangtze River is less than 100,000 tons, whi...

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no special spreader for the hollow trapezoidal concrete block, which is used to place the concrete block on the bottom of the river, so that the efficiency of laying the waterway at the bottom of the river is extremely low

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