Vertical type long shaft sea water pump

Abstract

The invention discloses a vertical type long shaft sea water pump. The vertical type long shaft sea water pump comprises a part capable of being pulled out and a fixed part, the part capable of being pulled out comprises an impeller, an impeller chamber, guide vane bodies, a pump shaft connected with a motor shaft, a sleeve coupling and an inner connecting pipe, and the fixed part comprises a sucking horn mouth, an outer connecting pipe and a discharging elbow. A pump discharging water outlet is communicated with a pump set lubricating water inlet through a main pipeline, the main pipeline is communicated with external water through an external water pipeline to carry out self-lubricating backwashing on the sea water pump, and the pump shaft is connected with the motor shaft through a diaphragm coupling. The vertical type long shaft sea water pump is simple in structure, light in weight, convenient to maintain and overhaul, high in running efficiency, reliable in running and long in service life and can be widely applied to petroleum and petrochemicals, a ocean platform, a power plant, an iron and steel plant, drainage engineering and other fields.

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

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

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