Electric borehole pump assembly, especially for water, has projecting balls in the walls of the cylinder and support to lock the pump at the required level in the casing

摘要

The electric borehole pump (2) assembly has a damper (4) in a toroid shape, between the flange of the support (3) and the yoke (5). Compensation openings, which can be closed, are within the borehole over and under the pump. A ring recess is within the support at the upper part. The lower part of the support has external drillings to take balls (9) of a larger diameter than the support wall thickness, and with radial movement. The lifting mechanism (7) has a cylinder (10) with movement in the support, linked to a lifting cable (13) by rods and carriers. Drillings in the cylinder wall take inserted balls (11).