A method and system for real-time fault detection of diaphragm pump check valve

Abstract

The invention discloses a real-time fault detecting method and a system of a diaphragm pump one-way valve, and is applied to the technical field of mechanical fault diagnosis. A vibration acceleration sensor is mounted at the upper end of a valve chamber shell of the diaphragm pump one-way valve; fault characteristic information of the diaphragm pump one-way valve is extracted by using vibration acceleration signals, and complicated fault multi-source information of the one-way valve is simplified, so that the fault detecting efficiency is improved; meanwhile, the invention provides a method for comprehensive judgment by using vibration signal waveform attenuation, dispersion and energy multiple indexes, so that the wrong judgment probability of final result caused by wrong judgment of single index is reduced, and the fault detecting accuracy of the diaphragm pump one-way valve is improved. In addition, the method can reduce the operation economical costs of enterprises to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of mechanical fault diagnosis, and in particular relates to a real-time fault detection technology of a check valve of a diaphragm pump. Background technique [0002] Diaphragm pump is a device used to transport solid and liquid two-phase medium. It is evolved on the basis of reciprocating piston pump by adding diaphragm chamber, so as to realize the isolation of transport medium and piston. Diaphragm pump not only has the characteristics of long transmission distance of piston pump, high concentration of medium and high temperature of environment, but also has the advantages of corrosion resistance, high efficiency and easy maintenance of diaphragm pump itself, so it is widely used in transportation fields such as petroleum, chemical industry and metallurgy. [0003] The one-way valve is an important part of the diaphragm pump, which plays a vital role in the process of transporting the slurry. Due to the ...

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Problems solved by technology

[0004] In the prior art, for example, Ma Jun, Wu Jiande, Wang Xiaodong, Jiang Di, Leng Tingting, etc. patented "A Diaphragm Pump Check Valve Multiple Information Acquisition Device and Installation Method (CN 105673473A)", which mainly solves the problem of diaphragm The acquisition, transmission and storage of multivariate information of pump check valves, and provides installation references for devices, but does not involve fault detection methods for diaphragm pump check valves; inventions by Wu Jiande, Zhang Zhongyun, Wang Xiaodong, Ma Jun, Fan Yugang, etc. The patent "An Acoustic Emission Signal Acquisition Device Applied to Diaphragm Pump Check Valve Fault Detection (CN 204646622U)" mainly proposes a noise acquisition device for the diaphragm pump check valve to provide sound detection information, but due to The background noise of the working environment of the check valve of the diaphragm pump is relatively large, and there is radiation noise interference from other equipment, resulting in complex sound signals collected and low availability; Feng Bin's invention patent "diaphragm pump check valve rubber wear failure Alarm device (CN 203035522U)”, which proposes a check valve with a built-in sensor, which will give a fault alarm when the rubber of the valve is worn to a certain extent. Because the sensor is integrated inside the check valve, its manufacturing cost is high, and For one-time use, it is difficult to widely promote

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