Water turbine guide vane shear pin shear signal detection system
A technology of signal detection and shearing pins, which is applied in the field of shearing signal detection system of hydraulic turbine guide vane shearing pins, can solve problems such as inability to locate shearing pins and inconvenient maintenance, and achieve the effect of shortening the defect processing time
Active Publication Date: 2017-09-12
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0003] When the shearing pin is cut off, the computer monitoring system of the power station should trigger a corresponding alarm message. The operation and maintenance personnel of the power station need to check the shearing pin cutting situation on site. Due to the large number of shearing pins, some large power plants have as many as 20 guide vanes. Above, the existing shearing pin shearing signal detection system can only judge whether a shearing pin is sheared, but cannot locate the position of the damaged shearing pin, which brings great inconvenience to maintenance
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[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the content of the present invention is not limited to the following embodiments.
[0020] see figure 1 , figure 2 and Figure 4 , a hydraulic turbine guide vane shear pin shear signal detection system, including shear pin shear signal sensor FC100, shear pin detection relay 1000, fault shear pin number display module 800 and alarm module 900, shear pin shear signal sensor FC100 and shear pin 200 quantity same;
[0021] See 3 and Figure 5 The shear pin shearing signal sensor FC100 is composed of a housing 11 and a pressure column 13 packaged in the housing 11, a spring 14, 2 pieces of conductor shrapnel 15 and 2 pairs of contacts 16. The spring 14 is fixed on the bottom of the inner cavity of the housing 11 and opened In the spring groove 17, the bottom end of the pressure column 13 is connected to the spring 14, and the top end protrudes from...
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The invention relates to a water turbine guide vane shear pin shear signal detection system which comprises shear pin shear signal sensors, a shear pin detection relay, a fault shear pin serial number display module and an alarm module. The shear pin shear signal sensors are installed on friction devices of a water turbine set. The number of the shear pin shear signal sensors is the same as the number of shear pins. Normally open contacts of the shear pin shear signal sensors have access to the fault shear pin serial number display module, normally closed contacts of the shear pin shear signal sensors have access to an excitation loop of the shear pin detection relay, and a normally closed auxiliary contact of the shear pin detection relay has access to the alarm module. According to the water turbine guide vane shear pin shear signal detection system, the shear pin shear signal sensors are arranged for detecting the working states of the shear pins, the fault shear pin serial number display module and corresponding connection circuits are arranged for displaying fault shear pin serial numbers, malfunction elimination is not needed, a fault guide vane can be directly positioned, and the defect treatment time is greatly shortened.
Description
technical field [0001] The invention relates to a shearing signal detection system of a guide vane shear pin of a water turbine, which is suitable for detecting whether a shear pin of a movable guide vane of a water turbine in a hydropower station is cut, and belongs to the technical field of detection systems of a hydropower station. Background technique [0002] The water turbine in the hydropower plant is equipped with multiple movable guide vanes, which play the role of regulating flow and forming circulation. see figure 1 , the shearing pin 200 is installed in the friction device 500 of the movable guide vane 400 and the pin hole on the crank arm 300, and each movable guide vane 400 is equipped with a shearing pin 200. Under normal circumstances, when the guide vane is in motion, the shearing pin 200 There is enough strength to drive the guide vane crank arm 300 to rotate. When the guide vane is stuck by foreign matter, the guide vane shaft and the guide vane crank arm...
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IPC IPC(8): F03B11/00
CPCF03B11/008Y02E10/20
Inventor 郑庭华李英才祁威威阚朝晖李帅轩杜义张瞳艾澜徐帅刘玉明蔡碧琛高园刘聪张才军
Owner STATE GRID CORP OF CHINA