Working principle of pneumatic butterfly valve - locking system and unlocking system of
1. If the locking system is not connected with the air source to control the height or there is no air valve device, it is called the locking system. The system uses a fixed amount of gas as the elastic medium. A certain amount of gas is blocked in the system, and the amount of gas remains unchanged under pressure and rebound. 2. Unlocked system of
2. It is connected to the air source through height control or other air valve devices, which is called the unlocked system. The same volume can be maintained at the design control height, whether at rest or under pressure. Now this kind of system is commonly used. On the premise that the height valve is fixed, the load force and elastic coefficient change with the pressure of the fixed gas. In this system, the additional pressure gas can maintain the height, that is, the negative load is changing. In this way, when the load changes, because the volume of the system can be kept unchanged, the natural shock is more fixed than the locking system. In a word, the natural shock frequency of the system will not change when the load changes.