An excavator is a common earth-moving excavation machine in the engineering field. Its main work is to use a bucket to dig materials above or below the ground surface and load them into a transport vehicle or a stockpile. It can be roughly divided into the following categories:
1. Backhoe excavator
The backhoe type is our most common and most widely used type of excavator. It can be used for excavation below the ground of the shutdown working surface, and it is not easy to excavate the part above the shutdown working surface. The basic operation methods are: trench end, trench edge excavation, straight line, curve excavation, excavation at a certain angle, ultra-deep trench excavation, etc.
2. Face shovel excavator
The shoveling action of the face shovel is characterized by “moving forward and cutting the soil upward”. The shovel has a large excavation force and can excavate above the shutdown surface, but cannot excavate the part below the shutdown working surface. It is suitable for excavation of dry foundation pits with an excavation height of more than 2m, but up and down ramps must be set. The main shovel bucket is larger than similar backhoe excavators. It can excavate soil of Class I to III with a moisture content not exceeding 27%. It can be used with a dump truck to complete the entire excavation and transportation operation, and can excavate large dry foundation pits and flatten earth mounds. It has different ways of excavating and unloading soil according to the different transport vehicles and excavation routes.
3. Dragline excavator
The dragline type is also called a rope excavator. Its excavation characteristics are: “backward and downward, cutting soil by self-weight”. It is used to excavate Class I and II soils below the ground level of the shutdown working surface. When working, the bucket is thrown out by inertia force, and the excavation is relatively far. The excavation radius and excavation depth are large, but it is not as flexible and accurate as a backhoe. It is particularly suitable for large and deep foundation pit excavation or underwater excavation.
4. Grab shovel excavator
The grab shovel type is also called a grab bucket excavator. Its excavation characteristics are “straight up and down, cutting by self-weight”. It is suitable for excavation of shutdown working surface, Class I and II soil below sea level, and is often used for excavation of foundation pits and caissons with soft soil. It is particularly suitable for excavation of deep and narrow foundation pits, dredging of old channels, and excavation of silt in water, or for loading loose materials such as gravel, sand, grain, etc. in seaports, and for loading ore, wood chips, timber, etc. in timber yards.
Post time: Jun-17-2024