Excavators perform continuous development, transportation and unloading of the soil are performed simultaneously and continuously. Compared with cars of cyclical actions they can provide higher performance, they are successfully used for large volumes of overburden operations, mining, digging ditches, canals, and profiling of slopes and other earthworks. According to the method of continuous excavators of the share on the machine longitudinal, radial and cross-digging, by type of work equipment – chain (scraper and shovel), screw and rotary; on chassis – on tracked, wheeled, rail, Walking, Tamping, sometimes excavation equipment can be mounted on cars or tractors. Chain bucket excavators small models are used in quarries and in the warehouses of raw brick factories. Excavators fitted with a telescopic system with track support, used for cleaning drainage channels, chain bucket excavator bucket with a vertical frame, can develop not only the trench, but trenches with vertical walls. Hanging chain scraper trenching equipment on a tractor "Belarus" are developing a trench depth of 1.6 m, width up to 0,4 m.
The soil, developed and raised by scrapers moves horizontal screws on both sides of the trench. Riding kanalokopatel is to develop a channel depth of 1.7 m from the inception of slopes of 1:1. As a working body of chain trenchers except bucket used plows, scrapers and chisels, and additional to the basic screw the working bodies for the development of slopes or to move the developed soil. A large number of buckets, scrapers, and other working bodies ensures the continuity of the excavator. Number ssypok discharged buckets of 0,5 3 per second and the ground is moving continuous jet. Use as working bodies of the scrapers 220 and provides a more unloading per minute. In addition, a large number of workers reduces the effort on one bucket and inertia, provides better use of vehicles, reduces the shock to them when completing and improves the performance of the machine. Many of these machines have a high specific efforts on 1 sq. km. cm section of chips, usually less than 0.7 MPa, and the machines with high digging force not less than 1,2 1,5 MPa, which gives opportunity to develop their frozen ground. Chain excavators provide the straight path working buckets and so precisely planned slopes.
