Patent ID: 8870092

Claim:
A viscosity driving device for a lifting buried spraying head comprising a cylindrical case ( 2 ), a filter ( 3 ) provided in the lower end of the case ( 2 ), and a spraying head driving unit which is disposed inside the case ( 2 ), wherein the spraying head driving unit is connected with a spraying head positioned on the top of the case ( 2 ) via a connecting shaft, and the spraying head driving unit drives the spraying head to rotate and spray water, wherein the spraying head driving unit comprises a tangential flow generator ( 4 ) and a hydraulic rotator ( 5 ), wherein the tangential flow generator ( 4 ) has a small case structure which is hollow, and forms a water supply gap with the inner wall of the case ( 2 ); flow inlets ( 44 ) are evenly distributed on the shell wall of the tangential flow generator ( 4 ) along the circumferential direction, thus water come through the flow inlet ( 44 ) rotates around the axle center; the hydraulic rotator ( 5 ) is disposed inside the tangential flow generator ( 4 ) and connected with the spraying head directly or indirectly via connecting shaft, and the hydraulic rotator ( 5 ) has a cylindrical bearing surface ( 57 ) corresponding to the flow inlets ( 44 ), and there is gaps exited between the bearing surface ( 57 ) and the flow inlets ( 44 ), wherein the hydraulic rotator ( 5 ) rotates, driven by rotating water through the cylindrical bearing surface ( 57 ).