Thermodynamic system valve inner leakage monitoring method

Abstract

The invention provides a thermodynamic system valve inner leakage monitoring method. The monitoring method comprises the steps that (1) valve inner leakage modeling is carried out to acquire sample large data between the valve inner leakage and a characteristic parameter; (2) data preprocessing is carried out to improve the learning precision and efficiency of a recognition model, and validity verification is carried out on sample large data between the valve inner leakage and the characteristic parameter in the step (1) to remove error data and normalize the data; and (3) based on an improved SVM nonlinear combination recognition model, a BP neural network recognition model, an RBF radial recognition model and a GRNN neural network recognition model are combined to calculate the thermodynamic system valve inner leakage under the specific characteristic parameter to monitor the valve inner leakage. According to the invention, a scientific professional basis is provided for an enterprise to arrange overhauling and change a planned overhauling mode according to the valve leakage condition, and the method plays an important role in reducing the valve leakage of the enterprise and improving the economy of production operation.

Description

technical field [0001] The invention relates to the technical field of valve internal leakage monitoring, in particular to a method for monitoring internal leakage of a thermal system valve. Background technique [0002] Valve is a kind of equipment with wide range and large quantity in industrial production, and it is an extremely important control component in fluid delivery system, which can be used to control water, air, steam, various corrosive media, mud, oil, liquid metal and radioactive The flow of various types of fluids such as media. Its basic function is to cut off or connect the circulation of the pipeline medium, change the flow direction of the medium, control the pressure and flow of the medium, and protect the normal operation of the pipeline and equipment. Valves are widely used in power plants. They are responsible for connecting various subsystems in the power plant. They are important accessories to ensure the safe operation of the power plant. The reli...

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Problems solved by technology

According to statistics, during the overhaul, more than 50% of the valves do not need to be dismantled and disassembled. If the cause of the internal leakage is unknown, dismantling and dismantling the valve will not only waste manpower and material resources, but may also cause some man-made problems. damage

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