Check the airtightness of the method of bubble method, smear method, chemical gas tracer leak detection method, pressure change method, flow method, ultrasonic. Detailed discussion is as follows:
1, the bubble method is the workpiece immersed in water, filled with compressed air, and then in a certain period of time to collect the leakage from the bubble to measure the leakage. Smear method is filled with a certain amount of air pressure inside the surface of the workpiece coated with soap and water, a class of easy to produce bubbles in the liquid, observe the production of bubbles in order to detect the size of the leakage.
2, chemical gas tracer leak detection method is the use of some luminous agent in the leak detector by ultraviolet light irradiation is excited by the principle of photophysical effect, the material emitted by the fluorescence of the analysis of the purpose of quantification.
3, the pressure change method is the compressed air into the container or pipeline, and then observed on the outside to see if there is gas leakage. If there is gas leakage, then the container or pipeline leakage problems. Flow method is to determine whether there is a leakage problem by measuring the flow of gas through the container or pipe.
4, ultrasonic method is the use of ultrasonic waves in different media propagation speed to detect leaks. When the ultrasonic wave passes through the air and liquid, its propagation speed will change. Therefore, you can determine whether there is a leakage problem by measuring the propagation speed of ultrasonic waves in different media.
Concepts and Knowledge of Gas Tightness
1. Gas tightness is the ability to prevent gas leakage, and is often used to describe the sealing performance of a material or system. Airtightness is very important in many fields, such as in industrial production, aerospace, automotive, medical equipment and other fields.
2, airtightness has a great impact on the performance of the product and the safety of use. For example, in the aerospace field, the good or bad airtightness is directly related to the safety performance of the aircraft. If the cabin of an airplane is not well sealed, it may lead to loss of pressure in the cabin, threatening the lives of the crew and passengers.
3, in the automotive field, the good or bad airtightness will affect the vehicle's fuel economy and emission performance. If the sealing performance of the car is not good, it may lead to fuel leakage, increasing fuel consumption and emissions.