On-line monitoring and analyzing system based on steam turbine main steam pipeline displacement

Abstract

The invention discloses an on-line monitoring and analyzing system based on turbine main steam pipeline displacement, and belongs to the field of turbine unit main steam pipeline monitoring. The problem that an existing pipeline measuring method is easily influenced by external factors such as the environment and consequently the measuring accuracy is low is solved. A displacement sensor of the invention is used for collecting displacement values of a measured frame body acting on a main steam pipeline in the X, Y and Z directions; an inclination angle sensor is used for collecting inclinationangle values of the measured frame body acting on the main steam pipeline in the X, Y and Z directions; a wireless data acquisition module is used for receiving the displacement values acquired by the displacement sensor and the inclination angle values acquired by the inclination angle sensor and uploading the displacement values and the inclination angle values to a terminal upper computer; andthe terminal upper computer is used for determining the fault condition of the measured frame body according to the acquired displacement values of the measured frame body, and is also used for obtaining the magnitudes of force and moment at the joint of the main steam pipeline and an air cylinder according to the acquired displacement values and inclination angle values of the measured frame body. The system is mainly used for monitoring and analyzing the state of the main steam pipeline.

Description

technical field [0001] The invention belongs to the field of monitoring the main steam pipeline of a steam turbine unit. Background technique [0002] The cylinder body of the steam turbine is connected with the steam pipeline, so that the steam enters the cylinder body of the steam turbine from the boiler to complete energy conversion. However, due to factors such as temperature changes and position limits, the pipeline has a large displacement. If it fails to move in the designed direction, the steam turbine unit may be jacked up. , bias, sliding pin system is not smooth and other problems. At the same time, the stress has not been effectively released, causing fatigue damage to the pipeline, damage to the welding points of the pipeline body and the vicinity of the interface, and steam leakage accidents. [0003] At present, the conventional methods still remain in the original measurement methods (lead drop test, dial indicator test), the test results are easily affected...

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