Self-locking self-opening special lifting tool for dam

Abstract

The invention provides a self-locking self-opening special lifting tool for a dam. The self-locking self-opening special lifting tool comprises a lifting tool body and a lifting rod. The bottom of thelifting tool body is provided with a blind hole. Two clamping jaws are hinged to the bottom of the lifting tool body. The top of the lifting rod is provided with a fixed shaft sleeve. The radial sizeof the bottom of the fixed shaft sleeve is greater than that of the lifting rod. The outer diameter of the fixed shaft sleeve is less than the inner diameter of the blind hole. The axial size of thefixed shaft sleeve is less than that of the blind hole. A movable shaft sleeve capable of sliding along the lifting rod is arranged on the lifting rod. The movable shaft sleeve is arranged below the fixed shaft sleeve. The lifting rod is provided with a lifting rod shaft shoulder. The two clamping jaws are shaped like an inverted V. The minimum distance between the upper portions of the two clamping jaws is a, and the maximum distance between the upper portions of the clamping jaws is b. The outer diameter of the fixed shaft sleeve is c, and c is greater than a or less than b. The outer diameter of the movable shaft sleeve is d, and d is greater than a and less than or equal to b. The self-locking self-opening special lifting tool can implement automatic locking and automatic opening, savemanpower and reduce safety accidents.

Description

technical field [0001] The invention relates to the technical field of spreaders, in particular to a special self-locking and self-opening spreader for dams. Background technique [0002] Fish are raised in the river, and dams are built on both sides of the river. Steps are built near the dam, and the lower steps are submerged in water. Fish cages are placed on these submerged steps. There are holes on the cage for fish to enter; when fishing, workers place the fish cage on the steps that are submerged in water. After a period of time, after the fish enters the fish cage, the fish cage is taken out again. Workers need to manually remove the fish It is very inconvenient to take out the cage; in order to save manpower, the hook of the crane is used to hook the fish cage and put it in place. When it needs to be taken out, the crane is used to lift the fish cage out. Workers go into the water to remove the hook of the crane. When lifting the fish cage, the workers need to go in...

AI Technical Summary

Problems solved by technology

[0002] Fish are raised in the river, and dams are built on both sides of the river. Steps are built near the dam, and the lower steps are submerged in water. Fish cages are placed on these submerged steps. There are holes on the cage for fish to enter; when fishing, workers place the fish cage on the steps that are submerged in water. After a period of time, after the fish enters the fish cage, the fish cage is taken out again. Workers need to manually remove the fish It is very inconvenient to take out the cage; in order to save manpower, the hook of the crane is used to hook the fish cage and put it in place. When it needs to be taken out, the crane is used to lift the fish cage out. Workers go into the water to remove the hook of the crane. When lifting the fish cage, the workers need to go into the water and hang the hook of the crane on the fish cage. Although this saves some manpower, the workers still need to go into the water, which is not safe. Therefore, it is necessary to design a The self-locking and self-opening spreader saves manpower and reduces the occurrence of safety accidents

Images