Water level control method for ultrasonic test on central holes of main bolts for nuclear power stations
A technology of water level control and ultrasonic detection, applied in the direction of liquid level control, non-electric variable control, control/regulation system, etc., can solve the problems of air bubbles, unsatisfactory detection signal, unable to guarantee the stable change of water level height, etc., to improve the detection efficiency , to avoid the effect of human error
Active Publication Date: 2012-04-18
STATE NUCLEAR POWER PLANT SERVICE
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Problems solved by technology
If the water is not replenished in time, the detection signal is not ideal, and it needs to be relocated and tested again
Adding water manually is easy to cause air bubbles, which cannot guarantee the smooth change of water level
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[0035] The present invention will be further described below in conjunction with accompanying drawing.
[0036] Such as figure 1 As shown, the control cabinet 1 and the field device 6 are necessary devices for automatic water level control to realize the ultrasonic detection of the center hole of the main bolt of the nuclear power plant. The control cabinet 1 is composed of an industrial computer 2, a 485 interface card 3, an I / O controller 4, and a valve drive circuit 5. The field device 6 is composed of a water tank 7, a water supply valve 8, a drain valve 9, a signal acquisition module 10, Guide rod encoder 11, pressure sensor 12, water supply pump 13 constitute, wherein industrial computer 2 through serial port RS232 ( figure 1 Not marked in ) is connected to the I / O controller 4, the I / O signal of the I / O controller 4 is connected to the water supply valve 8, the drain valve 9 and the water supply pump 13 in the field device 6 through the drive circuit 5, the pressure S...
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The invention relates to a water level control method for an ultrasonic test on central holes of main bolts for nuclear power stations, the water level control method is implemented mainly by using a control cabinet, a field apparatus and a water level control method, wherein the control cabinet is composed of an IPC (industrial personal computer), a 485 interface card, an I / O (input / output) controller and a valve-driven circuit, and the field apparatus is composed of a water tank, a water supply pump, a water feed valve, a water drain valve, a signal acquisition module, a pressure sensor anda guide-bar encoder; the IPC is connected with the I / O controller by a serial port RS232, the I / O controller is connected with the water feed valve, the water drain valve and the water supply pump bythe valve-driven circuit, the pressure sensor is connected with the signal acquisition module, the output end of the signal acquisition module is connected to the 485 interface card by a 485 bus, the485 interface card is inserted in a slot of the IPC, and the output end of the encoder is connected with the I / O controller; and the water level control is implemented by using a blurring operation rule. The method disclosed by the invention is applicable to the water level control for various ultrasonic tests on central holes of main bolts for nuclear power stations, and also can be applied to similar water level control processes.
Description
technical field [0001] The invention relates to a water level control method for ultrasonic detection of the center hole of a main bolt, in particular to a water level control method for the ultrasonic detection of the center hole of a main bolt of a nuclear power plant, which belongs to the detection of nuclear engineering. Background technique [0002] The main bolts of the on-site pressure vessels of nuclear power plants have been working under high-temperature and high-pressure irradiation environments for a long time, and are prone to fatigue damage. Generally, ultrasonic testing is carried out on the center hole of the bolt, and the coupling agent is deionized water. Since the main bolt is a nuclear first-level component, the water used for testing is a source of pollution. Therefore, in the detection process, how to control the smooth change of the water level, ensure the coupling effect, and avoid the overflow of the water level is worthy of research and attention. ...
Claims
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IPC IPC(8): G05D9/12
Inventor 刘呈则严智张宝军张国丰林明峰孙茂荣陶泽勇周路生
Owner STATE NUCLEAR POWER PLANT SERVICE