3results about How to "Homework easy" patented technology

This utility model relates to a two-stage manhole cover for gas valve wells, comprising a cover body including a primary manhole cover and a secondary manhole cover. The primary manhole cover is horizontally positioned with a through hole in its center; the secondary manhole cover is horizontally positioned on top of the primary manhole cover and covers the through hole. The advantages of this utility model are its simple structure, reasonable design, and the modular design of the manhole cover, which facilitates operation. It solves the problem of high labor intensity when opening and closing gas valve wells, reduces the frequency of handling and moving heavy manhole covers, thereby protecting the worker's health and improving the efficiency of gas well inspection and daily operation.

The utility model discloses an unpowered lifting conveying device which comprises a rack, a conveying mechanism, a first lifting mechanism and a second lifting mechanism, the first lifting mechanism is arranged on one side of the conveying mechanism and corresponds to a first feeding port, and the second lifting mechanism is arranged on the other side of the conveying mechanism and corresponds to a second feeding port. The second lifting mechanism is arranged on the other side of the conveying mechanism and corresponds to the first discharging port. According to the technical scheme, the treading piece is arranged in the first lifting mechanism to drive the first transmission piece to rotate upwards so that the first platform assembly can move upwards, workers do not need to bend down to pick up trays, the working intensity of the workers is greatly reduced, electric drive is not needed, energy is saved, and the working efficiency is improved. The maintenance cost of equipment can be reduced, and the production cost is effectively reduced; and the first spring balancer is arranged to assist the first platform assembly to move upwards, so that the treading force of a worker is reduced, and the operation of the worker is more labor-saving and easier.

The utility model belongs to the technical field of agricultural instruments, and particularly relates to a grass trimmer which comprises a body, a grab handle and a connecting rod, the body is connected with one end of the connecting rod, and the other end of the connecting rod is connected with the grab handle through a fixing piece. Reinforcing ribs, sawteeth and a blade are arranged on the main body; the main body is of a strip-shaped plate-shaped structure; the number of the connecting rods is two. The multifunctional weeding machine is simple in structure, multiple in function, easy to assemble, firm and durable, the grab handle is convenient to replace, weeding can be conveniently carried out, the use requirements of operators are met, the labor intensity is relieved, and the working efficiency is improved.