Multistage electric pump for improving coarse-particle solid-liquid two-phase slurry

Abstract

The invention discloses a multistage electric pump for improving coarse-particle solid-liquid two-phase slurry. The multistage electric pump comprises an electric pump outer shell, a dual-output-shaft submersible motor with a thrust bearing, an upper pump and a lower pump, wherein the dual-output-shaft submersible motor, the upper pump and the lower pump are arranged inside the electric pump outer shell, the upper pump and the lower pump are respectively arranged on an upper-end output shaft and a lower-end output shaft of the submersible motor, a two-channel annular runner is arranged between the electric pump outer shell and an outer shell of the submersible motor, two ends of the two-channel annular runner are in seamless connection with a runner of the upper pump and a runner of the lower pump through an upper suction shell and a lower suction shell so as to form an integral runner of the electric pump, and the coarse-particle slurry can smoothly flow through the runner or flow back. According to the invention, the problem of runner blockage of coarse particles caused by detainment or backflow in the runner is solved, and the multistage electric pump has the characteristics of reasonable structure, simplicity for operation, capability of allowing the large coarse particles to flow through and flow back, high lift and the like.

Description

technical field [0001] The invention relates to the field of solid-liquid two-phase hydraulic lifting equipment, specifically a multi-stage electric pump for lifting coarse-grained solid-liquid two-phase slurry, which is mainly used in marine mineral resources mining systems to lift seabed minerals from the seabed to the seabed through pipelines. On the surface mining ship, it can also be used in the land deep mineral resource mining system to lift minerals from the deep bottom of the well to the surface of the ground. Background technique [0002] As the most promising emerging industry in the 21st century, marine mineral resources mining is generally valued by countries all over the world. The international seabed area, which accounts for 49% of the earth's surface, contains rich metal mineral resources such as manganese nodules, cobalt-rich crusts, hydrothermal sulfides, and polymetallic oozes. It is the largest potential strategy on the earth that has not yet been fully ...

AI Technical Summary

Problems solved by technology

[0005] In view of the existing technical difficulties such as easy blockage of the existing electric pump for lifting coarse-grained solid-liquid two-phase slurry, the present invention aims to provide a multi-stage electric pump for lifting coarse-grained solid-liquid two-phase slurry. The structure of the electric pump is Reasonable force, safe and reliable operation, smooth passage and return flow without blockage, the maximum particle size is 50mm, which can greatly improve the coarse particle flow and return capacity of the flow channel of the pump and the annular flow channel of the motor casing, and solve the Problems such as blockage caused by multi-stage series connection of pumps

Images