SUBMERSIBLE PUMP Russian patent published in 1994 - IPC

FIELD: submersible pumps used for wash-out and handling of ground. SUBSTANCE: housing has vortex chamber, delivery branch pipe and perforated shell. Impeller is arranged inside the vortex chamber. Headpiece is arranged on side of pump inlet coaxially relative to the housing. Hydraulic vortex stirrer with nozzles connected to high-pressure liquid source is arranged in the headpiece. Nozzles are mounted in the center and over periphery of the headpiece chamber. Headpiece is provided with passages which are spread in height; axes of these passages which are spread in height; axes of these passages are oriented in the direction of impeller rotation. Passages are arranged over equidistant circumferential and helical lines. Headpiece is connected with housing in its upper portion. Such construction of headpiece excludes dissipation of energy of vortex into surrounding medium. EFFECT: enhanced economical efficiency of pump through reduction of consumption of energy for wash-out of ground. 3 cl, 2 dwg