According to the categories of grasping materials and the requirements of the user, the design of the belt, such as the open and open beam, the underwater operation etc.

level

Because the size of the bucket is different, the volume of the material is different, and we usually divide the grab into four levels: light, medium, heavy and overweight.

The working principle of

Four rope logs are made up of poles, jaw plates and beams. Four rope grab log material taking action on crane hoisting drum and controlled drum, two root on the hoisting drum winding rope end fixed on the wedge of grab the head shell, shell and wedge grab articulated head, hoisting drum rotates the lead wire rope through the wedge shell grab the rise and fall; The two wire ropes wound around the open coils are wrapped around the pulley between the head and the beam, controlling the opening and closing of the grab. Picking, grab with open state to dump on the fixed time when open and close drum), is open and close the hoisting direction to start the drum (hoisting rope fixed), in the grab bucket under the action of gravity, grab jaw to dig into the material, grab the closed completely, open and close to start the hoisting drum and drum at the same time, will be full of grab ascend to a certain height, to start the move grab crane unloading location, moving in the direction of falling open closed drum (fixed hoisting drum), grab the opening unloading.