Convenient lifting device for manhole covers

Abstract

The invention discloses a convenient lifting device for manhole covers. The convenient lifting device comprises a lifting base frame; a dragging mechanism and a base frame leveling mechanism are arranged on the lifting base frame; two lifting sliding rails are arranged on the lifting base frame; lifting sliding seats are glidingly mounted on the two lifting sliding rails; lifting vertical arms aremounted on the two lifting sliding seats; a lifting cross beam is mounted at the top ends of the two lifting vertical arms; two connecting rod sliding seats are glidingly mounted on the lifting crossbeam; an upper force application seat is arranged above the two connecting rod sliding seats; upper connecting rods are hinged between the upper force application seat and the two connecting rod sliding seats; a lower force application seat is arranged below the two connecting rod sliding seats; lower connecting rods are hinged between the lower force application seat and the two connecting rod sliding seats; a lifting screw is rotationally mounted on the upper force application seat; a lifting screw sleeve is arranged on the lower force application seat; a control device is mounted on the upper force application seat; and a manhole cover hooking device is mounted on the lower force application seat. According to the convenient lifting device, by the aid of the upper connecting rods and the lower connecting rods, the triangular stable support is formed for the lifting screw and a connecting piece of the lifting screw, the structure is more reliable, driving by the aid of an electric wrench is facilitated, and the lifting efficiency can be improved.

Description

technical field [0001] The invention relates to a hoisting machine, in particular to a convenient hoisting device for a kiln manhole cover. Background technique [0002] Kilns are usually vertical shafts, mainly used to facilitate inspection and maintenance between underground passages, and are widely used in many industries such as power transmission, heat transmission, water and gas supply, communication cables, and rain and sewage discharge. The main structure of the kiln well includes the kiln body and the manhole cover that is buckled along the kiln well. The kiln body is respectively connected to two sections of underground passages. The maintenance personnel can use the through hole to lift the manhole cover, so as to enter the kiln body for related inspection and maintenance work. [0003] In order to ensure the safety of the kiln wells and to avoid impacts on urban life, the kiln well covers are either made of steel or concrete manhole covers. No matter what kind o...

AI Technical Summary

Problems solved by technology

This traditional method has disadvantages such as low safety, inconvenient carrying and transportation of tools, easily damaged manhole covers and tools, time-consuming and labor-intensive, etc. The inventor has published an invention patent application with the application number "CN201811219621.3" and the name "Portable Manhole Cover Safety Lifting Device" , using a convenient mechanical lifting to solve the above problems, but in the actual application of the lifting device, the inventor found that due to reasons such as the heavy weight of the manhole cover and the shaking of the manhole cover during the lifting process, the structure at the nut is prone to deformation, which affects the lifting operation; Moreover, the lifting screw and the balance support structure are all screw drives, maintenance personnel need to go through a long period of operation to achieve lifting or support, which affects the lifting efficiency

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