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

FIELD: water supply systems. SUBSTANCE: device is intended for delivery of artesian water to trunk lines of municipal water supply systems. Device has following components: pressure pipeline, multiple-section immersed pump together with electric motor installed in casing pipe, and hydraulic sealing unit installed on pressure pipeline below static water level in well. Hydraulic sealing unit is provided with shut-off mechanism, float and supporting flange of pressure pipeline. Upper end of it has float stroke limiter made in the form of bushes of preset length. Each bush is rigidly installed for ensuring coaxiality with corresponding through-hole in supporting flange. Mounted on float and on supporting flange at side of casing pipe are corresponding upper edge and lower of main sealing unit lower edge of cylindrical configuration. Walls of main sealing unit at side of pressure pipeline are pivotally connected with common axles of operating mechanisms, each of them is made up of first and second levers. Stationary axle of first lever is pivotally connected with upper end of supporting flange, and stationary axle of second lever is connected with lower end of float which is provided with additional sealing member. Each of them is installed for ensuring coaxiality with corresponding float stroke limiter. Each float stroke limiter carries shut-off mechanism rod rigidly installed on lower end of float. Installed in each rod is one shut-off member having return spring. Aforesaid embodiment of device ensures reliable sealing between walls of pressure pipeline and casing pipe of well. EFFECT: higher efficiency. 3 dwg