DEVICE FOR DELIVERING WATER FROM WELL Russian patent published in 1998 - IPC

FIELD: water supply machinery and equipment. SUBSTANCE: this is intended for utilizing underground water and operating water intake structures including withdrawal of artesian water from well into trunk lines of municipal water supply systems. Device has electrically-driven pump with delivery pressure pipeline on which hydraulic sealing unit is installed having body and first inflatable chamber. Body of hydraulic sealing unit is made up in the form of two pieces of pipe. End faces of each piece of pipe are provided with upper and lower flanges. Upper flange of first piece of pipe is connected with lower flange of delivery pressure pipeline. Lower flange of second piece of pipe is connected with upper flange of electrically-driven pump. Located on lower flange of first piece of pipe and on upper flange of second piece of pipe of body which are rigidly interconnected through first row of uniformly arranged studs are respectively upper rim of first inflatable chamber and lower rim of first inflatable chamber. Installed on walls of first and second pieces of pipe of body is single additional flange per each. Mounted on flanges are respectively upper and lower rims of second inflatable chamber. Diameter of additional flanges which are rigidly interconnected through second row of uniformly arranged studs exceeds value of diameters of flanges of hydraulic sealing unit body and this is conducive to washing-off dirt penetrating into hydraulic sealing unit at engagement of pump and also completely excludes accumulation of sand in its space. EFFECT: higher efficiency. 2 dwg