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What is the principle of high-voltage discharge leak detection machine?
Date: 2024-07-30Read: 3
The principle of high voltage discharge leak detection is a method of detecting gas or liquid leaks by utilizing the arc discharge phenomenon generated by high voltage discharge.
The specific principle is as follows:
1. Inflate or add liquid: Fill the gas or liquid to be tested into the object or equipment being leak detected. If there is a leak, gas or liquid will escape from the leak or poorly sealed area.
2. Apply high voltage: Apply a high voltage, usually several thousand volts of direct current, around the object to be detected. High voltage will generate a strong electric field between the electrodes, causing the gas or liquid in the electric field area to be ionized and form an arc.
3. Electronic measurement: using current measurement equipment generated by voltage discharge to measure the magnitude and direction of current. If there is no leakage, the current will stabilize around a reference value. If there is a leak, the leaked material will interfere with the arc discharge, causing changes in current.
4. Detecting leakage location: Determine the location and severity of the leakage based on changes in current and its direction. The magnitude and direction of current changes can reflect the size and location of leakage.
The advantage of the high-voltage discharge leak detection principle is that it can detect small gas or liquid leaks and quantitatively evaluate the degree of leakage through current measurement. However, it should be noted that this method requires high sealing performance for leak detection objects or equipment, otherwise it may result in inaccurate detection results.
