PUMP UNIT FOR STEPWISE LIFTING OF LIQUIDS Russian patent published in 2012 - IPC F04F1/08 F04B47/00 

FIELD: machine building.

SUBSTANCE: unit for stepwise lifting of liquids comprises includes the cumulative fluid chambers 81, 82 and 83 placed in a well and are communicated between each other with pipings 1, 113, 102, 112, 101 and 111 for supply of the liquid, with vacuum lines 2a, 2, 213, 202, 212 and 201 and three pipes, 313, 302, 312 and 301 to supply compressed gas. Located on the surface are vacuum pump 5, compressor 6, receiver 7 for compressed gas, vacuum regulator, four valves B₁, B₂, B₃, B₄. Pipeline 1 for supply of the liquid via the first valve B₁ is connected to the return line of the liquid. The vacuum line is connected via the second valve B₂ to the inlet of the vacuum pump, the exit of the vacuum pump is connected to the inlet of compressor 6, the outlet of compressor 6 is connected to receiver 7, one exit of which is connected via the third valve B₃ to the pipeline for supply of the compressed natural gas, and the other is connected to the vacuum line through a fourth valve B₄. Each of the storage chambers 81, 82 and 83 is provided with an electronic control unit 71, 72 and 73 and the electromagnetic valves (EPV) 51, 52 and 53 installed on the pipeline 3. EPV 61, 62, 63 are installed on vacuum line 2. Liquid delivery valves are made of two valves in each camera 11 and 21, 12 and 22, 13 and 23 on the bottom of the cameras 81, 82 and 83 with a pipeline rupture in the storage chambers 11, 112 and 113 and in the sections between the chambers 101 and 102. At the bottom of the storage chamber of a lower level sensor is installed, in the upper part of the storage chamber the top level sensor is installed.

EFFECT: device allows to pipe over the products of high viscosity and high content of abrasive solids.

1 dwg