泄漏, 检测装置, 液体阀门, 声发射

A leakage detecting device for liquid valve was developed based on the theory of acoustic emission, and corresponding experimental system was designed to test its performance. The experimental results show that the checked results are the best when the checking frequency enacted in 25kHz under the same leakage rate. The sound difference on the back and front of the liquid valve is no less than 2dB when their pressure difference is no less than 1.0MPa, and the liquid leakage rate is no less than 3.5mL/s, the sound of leakage is relatively evidence. The sound difference on the back and front of the liquid valve is no less than 3dB in the condition of their pressure difference is no less than 3.5MPa, and the leakage rate is no less than 2.5mL/s, the sound of leakage is evidence. Owing to its small-size with being easy to carry, convenient in operation，run steadily, and it is effective to small leak. The leakage detecting device is an optimum and promising device for leakage detection of liquid valve in the field of ship.

leakage, detecting device, liquid valve, acoustic emission