Internal leakage detection method of steam trap based on detection of pipe wall temperature in front of the valve

Abstract

The invention discloses a method for detecting inner leakage of a steam hydrophobic valve based on valve front pipe wall temperature detection. The method includes the following steps that a first representative point and a second representative point are selected at the positions where the front end specified distance and the interval specified distance of the steam hydrophobic valve are detected respectively, modeling is conducted on the theoretical pipe wall temperature of the first representative point and the theoretical pipe wall temperature of the second representative point through a statistical regression model, pipe wall temperatures corresponding to the representative points are actually measured, then, according to a hypothesis iterative algorithm, the leakage rate corresponding to the first representative point, the leakage rate corresponding to the second representative point and the leakage rate corresponding to the temperature difference of the two representative points are acquired, and one of the three leakage rates acquired by calculation is selected as the final leakage rate of inner leakage of the steam hydrophobic valve to be detected and then output. Qualitative and quantitative detection or online monitoring of inner leakage of the valve can be achieved, and the method has the advantages of being high in inner leakage detection accuracy and detection speed and wide in application range.

Description

technical field [0001] The invention relates to a steam trap internal leakage detection technology, in particular to a steam trap internal leakage detection method based on the temperature detection of the pipe wall in front of the valve. Background technique [0002] The steam traps widely used in steam heating projects and steam power plants, due to the harsh operating conditions, the valve opening and closing operations are becoming more and more frequent. happens sometimes. Once the steam trap valve leaks, it will not only lead to equipment performance degradation, energy loss and economic loss, but also damage the valve in a short time, posing a serious threat to the safety of the equipment. At present, controlling valve leakage is an important measure for steam thermal engineering enterprises to save energy and reduce consumption, and improve the safety and stability of equipment operation. [0003] Valve leakage can be divided into external leakage and internal leak...

AI Technical Summary

Problems solved by technology

However, due to the differences in the working conditions of the medium, the performance of the heat insulation layer, the structure of the valve and the pipeline system, etc., it is a very complicated technical problem to use this method to judge the leakage of the valve. economic losses, leaving many safety hazards for equipment operation

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