A fire pump cavitation monitoring method

Abstract

The invention discloses a fire pump cavitation monitoring method. The fire pump cavitation monitoring method comprises the following steps: acquiring and storing saturated vapor pressure of water andoperation and structure related parameters of a fire pump; acquiring and storing suction inlet pressure, flow and passing water temperature of the fire pump in real time at fixed time intervals; checking a list to obtain the saturated vapor pressure corresponding to the current water temperature and calculating a series of net positive suction head (NPSH) values; and judging the cavitation condition of the fire pump, and taking targeted measures according to judged results and giving corresponding reason prompts. The fire pump cavitation monitoring method starts from comparison of objective phenomena of effective NPSH and necessary NPSH of the fire pump, considers influences of the suction inlet pressure, the flow and the water temperature on the effective NPSH, studies factors comprehensively and directly, and has the advantage of high analysis result reliability.

Description

Technical field [0001] The invention belongs to the technical field of fire pump monitoring, and specifically relates to a fire pump cavitation monitoring method. Background technique [0002] With the development of economy and society, people are paying more and more attention to safety issues. Among them, fire is a safety accident that is widely valued by people. When a fire occurs, the most common method is to use a fire pump to deliver water to extinguish the fire. However, the environment of the fire extinguishing site is often very complicated, and various factors are full of uncertainty. Once the fire pump fails due to some subjective or objective reasons, it will affect the normal operation and water delivery of the fire pump, which will easily cause the fire extinguishing work. Adverse consequences. Cavitation is a very common type of operation failure during the operation of fire pumps. When the fire pump is in operation, the delivery flow is too high, the water te...

AI Technical Summary

Problems solved by technology

However, these technologies have the following deficiencies in the following three aspects: First, the vibration signal monitoring of pumps and other hydraulic machinery relies on high-precision, easily damaged vibration sensors and their attached signal analysis equipment, which is not only expensive, but also requires professional installation and Maintenance technology; second, the environment where the fire pump operates is harsh, and the conditions in all aspects are complex, and various environmental factors may interfere with the vibration of the equipment, thereby affecting the reliability of cavitation diagnosis; third, relying on vibration monitoring can only be simple It can accurately judge whether cavitation has occurred, but it cannot give the possible reasons for the occurrence, and there is no way to guide the on-site personnel to troubleshoot.

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