Grab shovel excavator is also called grab bucket excavator. Its excavation characteristics are: "straight up and down, self weight soil cutting". It should be used to excavate Class I and II soil below the parking surface, and it is often used to excavate foundation pits and open caissons in soft soil areas. It is especially suitable for digging deep and narrow foundation pits, dredging old channels, digging silt in water, etc., or loading loose materials such as gravel and slag. The excavation methods include trench side excavation and positioning excavation. If the grab bucket is made into a grid strip, it can also be used to load ore blocks, wood chips, wood, etc. in the wood storage yard.
Today's excavators account for the vast majority of all hydraulic full swing excavators. Hydraulic excavator is mainly composed of engine, hydraulic system, working device, walking device and electrical control. The hydraulic system consists of hydraulic pump, control valve, hydraulic cylinder, hydraulic motor, pipeline, oil tank, etc. The electrical control system includes monitoring panel, engine control system, pump control system, various sensors, solenoid valves, etc.
