Self-controlled type self-absorption centrifugal pump for ship

Abstract

The invention discloses a self-controlled type self-absorption centrifugal pump for a ship. The self-controlled type self-absorption centrifugal pump comprises a centrifugal pump body, an aspirator, a pressure-control pipeline and an aspiration pipeline, wherein a water inlet of the centrifugal pump body is in lap joint with the aspirator; and the aspirator comprises a liquid-level switch, a jetting pump, a pressure-control switch, a solenoid valve and a pneumatic pump. A power source of the jetting pump is compressed air; and the pressure-control switch of the jetting pump separately communicates with the liquid-level switch and the solenoid valve. The two ends of the pressure-control pipeline are separately connected with a water outlet of the centrifugal pump body and the pressure-control switch; and the two ends of the aspiration pipeline are separately connected with an external joint of an internal pump cover of the centrifugal pump body and the liquid-level switch. According to the self-controlled type self-absorption centrifugal pump for the ship disclosed by the invention, the aspirator and the centrifugal pump body constitute the self-absorption pump, so that the structure is relatively simple, the size is small, suction ability is remarkably improved, and artificial water injection is not needed before starting. Under this working condition, automatic control is easily realized, labor duty is not needed during a working period, and therefore, the self-controlled type self-absorption centrifugal pump is especially suitable for being matched with a fire-fighting water supply system of the ship.

Description

technical field [0001] The invention relates to a water pump, in particular to a marine self-priming centrifugal pump, in particular to a self-controlled marine self-priming centrifugal pump. Background technique [0002] The supporting domestic water supply system, fire fighting water supply system and ballast water system of the ship all rely on water pumps to maintain operation, and most of the water pumps supporting such systems are centrifugal pumps. With the pace of scientific and technological progress and the popularization of smart devices, the engine room of large and medium ships has entered the era of unattended operation, and the matching centrifugal pumps must also be intelligently controlled. Therefore, the supporting centrifugal pump must have a self-priming structure, and only with self-priming function can intelligent control be realized. There are many kinds of commercial self-priming centrifugal pumps available in the market today, and the structures are...

AI Technical Summary

Problems solved by technology

There are many kinds of commercial self-priming centrifugal pumps available on the market today, and the structures are different, but they all have a common weakness, that is, when they are used for the first time or at intervals of a long time, they must be manually injected into the pump, and then the pump can be started. Self-priming, although this operation is not difficult, it is not suitable for modern ships

Especially for self-priming centrifugal pumps with gas-liquid separation chamber, return hole and diaphragm structure, because the configured gas-liquid separation chamber has a certain volume, the installation area of ​​the pump is large and the weight is heavy.

In addition, internal leakage exists in the return hole reserved in the pump and the gap between the diaphragm and the impeller, which makes the pump run inefficient

In general, self-priming centrifugal pumps of the prior art are not suitable for direct use in modern ships

Images