Vertical Long Shaft Sea Water Pump

Abstract

The invention discloses a vertical long-axis seawater pump. The vertical long-axis seawater pump includes an extractable part and a fixed part; the extractable part includes an impeller, an impeller chamber, a guide vane body, a pump shaft connected to a motor shaft, a sleeve coupling, and an inner pipe. The above fixed part includes a suction bell mouth, an external connection pipe, and a discharge elbow; among them, the pump discharge port and the lubricating water inlet of the pump unit are connected through a main pipe, and the main pipe is connected with the external water through an external water pipe. The pump performs self-lubricating backwashing, and the pump shaft is connected with the motor shaft through a diaphragm coupling. The invention has the advantages of simple structure, light weight, convenient maintenance and repair, high pump operation efficiency, reliable operation and long service life, and can be widely used in the fields of petroleum and petrochemical, offshore platform, power plant, steel plant and drainage engineering.

Description

technical field [0001] The invention relates to the field of seawater pumps, in particular to a vertical long-axis seawater pump. Background technique [0002] With the continuous development of the petroleum and petrochemical industry and the demand for seawater for the circulating water of power plants, vertical long-axis seawater pumps are more and more widely used. [0003] At present, the vertical long-axis seawater pumps on the market are equipped with a variety of materials, such as nickel-chromium cast iron, martensitic stainless steel, austenitic stainless steel, etc. The guide vane body of the seawater pump is completed by casting, such as Figure 8 As shown, the guide vane body 4 includes an inner cylinder 17 and an outer cylinder 20, an inlet flange 19 arranged at the water inlet end of the outer cylinder 20, a guide bearing body 14 arranged at the water inlet end of the inner cylinder 17, and a water outlet flange arranged at the outer cylinder 20 and the inner c...

AI Technical Summary

Problems solved by technology

[0007] 1. Most of the water intake is external lubricating water, resulting in a waste of precious fresh water resources, which violates the country's call for energy conservation and emission reduction during the "Twelfth Five-Year Plan" period

[0008] 2. Most of the self-lubricating filters are Y-type filters. Y-type filters generally have defects such as small dirt holding capacity, easy to be blocked by dirt, complicated cleaning work, and will affect the work of the pump unit during the cleaning process.

[0009] 3. The backwashing mode of the existing filter is backwashing with external pressure water, which needs to provide clean external pressure water throughout the process, resulting in waste of resources, and if there is a problem with the external pressure water (such as unstable water volume, polluted water source, etc.) , the filter backwash will fail, resulting in safety hazards

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