DEVICE FOR BURIAL OF OPERATING UNDERGROUND PIPELINE Russian patent published in 2015 - IPC E02F5/10 

FIELD: construction.

SUBSTANCE: device for burial of an operating underground pipeline includes rotating cutting mechanisms in the form of three cutting drums and movably connected at an angle of 120° by means of a torque moment transfer device of lower and side screws. The device is moved by means of forces transferred from a self-propelled machine. Possible control of a burial value of the lower screw is provided by means of a level unit. Length of the lower screw is at least 1.4 of diameter of the external surface of the underground pipeline; length of the side screw is at least 1.3 of the required burial value of the lower generatrix of the underground pipeline. Connection of casings is stiff and a common plane is formed for each of their end faces. Length of arc of each of the casings in the cross-section is equal to 0.3 of length of a circle formed with the casing. Casings relative to lower and side screws are arranged so that their upper end faces are located at the distance of at least 0.2 of arc length of each of the casings from their intersection line with the vertical plane.

EFFECT: device allows preserving an insulating coating of the pipeline during execution of earth work and reducing volume of moved earth masses.

4 dwg