阀门流量试验（Valve flow test）.doc

阀门流量试验（Valve flow test） Test process Carried out a thorough and meticulous division of labor in the organization before doing the experiment, the test scheme of valve characteristics, we cooperate closely in Xinhua company lonkings, in the required conditions, respectively in May of the following loading (135130125120115110105100,95,92,89,86,83MW) to do the test, operation personnel responsible for the implementation of the test operation. (1) purpose of the test: 1) measuring the single valve under high pressure governing valve stroke h and flow (regulating pressure characteristics). 2) measuring multi valve under high pressure governing valve stroke h and flow (regulating pressure characteristics). Including GV1 (GV2, GV3, full closed GV4), GV1 (GV3, GV4, GV2 full closed), GV1-GV3 (GV4 off), GV1-GV4 full open condition. 3) according to the above measured valve stroke flow characteristics, optimize valve management, improve economic efficiency. Two) test preconditions: 1) the unit must maintain the rated main steam pressure. 2) the unit load can change between the rated parameter, the full load of the valve and the load range of 60MW. 3) the main measuring point transmitter and the measuring channel are qualified. 4) test procedures, commissioning, installation comply with test requirements (can remove valve overlap). Three) test methods: 1) steam condition adjustment is completed by boiler control system. 2) the valve running condition is completed by the DEH test program; DEH in the valve position control mode (MW, IMP loop removal), change the given value (ie valve position instructions) to achieve changes in the test conditions. 3) the pressure, the given value, the flow rate, the valve position, the power and so on, are collected by DEH, and the flow is replaced by the pressure of the regulating stage. 4) the management curve uses no overlap curve. 5) DEH by a given valve position adjustment, boiler pressure stability, DEH data acquisition, the main steam pres