DEVICE FOR DELIVERING WATER FROM WELL Russian patent published in 1999 - IPC

FIELD: water supply systems. SUBSTANCE: devise relates to mechanisms and appliances intended for operation of underground water sources and namely for pumping out artesian water and deliver it to trunk lines of municipal water supply systems. Device has pressure pipeline installed together with immersed electric motor in casing pipe together with hydraulic sealing unit installed below water static level in well. Hydraulic sealing unit is made in the form of body and main sealing member. Main sealing member takes configuration of hollow cylinder and is installed on external side wall of body. Body of hydraulic sealing unit is made in the form of float located in casing pipe coaxially with pressure pipeline. Made in internal and external side walls of float are holes for guide pipes. Axes of symmetry of guide pipes are radially oriented in plane which is perpendicular to axis of symmetry of float. Seated in each guide pipe is return spring and pusher which is fixed on internal surface of main sealing member. Mounted on wall of pressure pipeline is supporting member made in the form of cylinder with circular groove made in its external surface. Installed on upper end of float is additional sealing member made as ring with its internal diameter not larger than external diameter of supporting member. Aforesaid arrangement of device components ensures reliable sealing between walls of pressure pipeline and casing pipe in well. EFFECT: higher efficiency. 3 dwg