Submersible multistage electric pump

Abstract

The invention provides a submersible multi-stage electric pump, the upper cover and the lower cover are located at the corresponding upper and lower ends of the machine base; the machine base is provided with a rotor and a stator, the rotor is located in the stator, and the rotor drives the rotating shaft to rotate at high speed when electrified; It is characterized in that: the base includes a water inlet section, a guide vane member with a guide vane shell part and a guide vane part, an impeller A, a volute, an impeller B and a water outlet, and the impeller A and impeller B are set to rotate On the shaft, the volute is fixed by bolts; the base includes a lining and a corrosion-resistant layer, the corrosion-resistant layer is set on the lining, and the lining is a carbon structural steel lining; the guide vane The component has two parts: the guide vane part and the guide vane shell part. The invention realizes reducing the production cost of the submersible electric pump and improving its corrosion resistance. At the same time, the difference of this multi-stage pump is that the guide vane part and the guide vane shell part are casted into a stainless steel whole, which makes it easy to replace and remove the whole, realizes quick installation, is easy to use, and helps to improve work efficiency.

Description

technical field [0001] The invention relates to a submersible electric pump, specifically a submersible multistage electric pump. Background technique [0002] Submersible electric pump is a drainage machine that works in submerged water, and is an important equipment for deep well water extraction. Widely used in domestic water, mine rescue, industrial circulating water cooling, farmland irrigation and seawater lifting and other fields. The submersible electric pump system usually includes: water pump (including pump casing diffusion chamber, impeller, water suction port), submersible motor (including cable), water pipeline and control switch. When in use, submerge the submersible pump into the liquid. Turn on the control switch to supply power to the submersible motor. Driven by the submersible motor, the impeller of the water pump rotates at high speed, and the liquid enters the water pump through the suction port and rotates with the impeller. Under the action of cent...

AI Technical Summary

Problems solved by technology

Due to the loose structure of the cast iron material itself, the pass rate of the airtightness of the machine base parts will be reduced, so that the supplier and the buyer of the casting will increase the cost, and because the corrosion resistance of the cast iron material is not high, resulting in the use of this material The machined base is easily corroded

[0004] In these current multistage pumps, the guide vane and the guide vane casing of the multistage pump are separated; this form of guide vane product is not easy to use, and it is time-consuming and laborious to assemble, so it needs to be improved

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