Turbine vacuum system leakage detection comprehensive test device and method

Abstract

The invention discloses a turbine vacuum system leakage detection comprehensive test device and method. The device comprises: a helium mass spectrometer leak detection system and an ultrasonic leak detection system, the helium mass spectrometer leak detection system comprises a helium cylinder, a constant pressure regulating valve, a spray gun, a vacuum pump and a helium mass spectrometer leak detector, the helium cylinder, the constant pressure regulating valve and the spray gun are connected in sequence, the vacuum pump is connected with a condenser, and a suction gun of the helium mass spectrometer leak detector is connected with an atmosphere exhaust interface of the vacuum pump. According to different characteristics of a helium mass spectrum leak detection technology and an ultrasonic leak detection technology, advantages and disadvantages are complementary, the two technologies are simultaneously applied to the leakage detection test of the steam turbine vacuum system. Optimization and summarization are carried out by combining different characteristics of a leakage detection environment; a leak detection instrument and a developed leak detection test special tool are used,and methods such as research, summarized constant-pressure quantitative test, fixed-point test and the like are comprehensively applied to carry out leak detection test on the steam turbine vacuum system, so that the accuracy and reliability of the leak detection test are improved, and the safe and stable operation of a unit is guaranteed.

Description

technical field [0001] The invention belongs to the field of steam turbines, in particular to a comprehensive leak detection device and method for a vacuum system of a steam turbine. Background technique [0002] In the steam turbine generator set, the leakage of the vacuum system of the condenser will directly affect the economical and safe operation of the generator set. When the leakage of the condenser vacuum system is serious, the generator set will be forced to reduce the load or shut down, causing serious economic losses. The leakage of the condenser vacuum system has become a common problem in large and medium-sized generator sets. Due to the increasingly complex vacuum system, leakage may be caused during installation and maintenance, but it is not easy to be found. Therefore, these factors cause vacuum system leakage, which has become a major technical problem for power plants. [0003] At present, there are many instruments and methods for leak detection of steam...

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Problems solved by technology

However, these methods have low sensitivity or damage detection, resulting in unsatisfactory leak detection results.

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