More detailed working principle of pneumatic butterfly valve in history
When the pneumatic butterfly valve works, the inner chamber is filled with compressed air (the working pressure is 0.7MPa) to form a compressed air column. With the increase of the vibration load, the height of the ball valve decreases, the volume of the inner chamber decreases, the stiffness of the ball valve increases, and the effective bearing area of the air column in the inner chamber increases. At this time, the bearing capacity of the pneumatic butterfly valve increases. When the vibration load decreases, the height of the ball valve increases, and the volume of the inner chamber increases. The stiffness of the ball valve decreases, and the effective bearing area of the air column in the inner chamber decreases. At this time, the bearing capacity of the ball valve decreases. In this way, the height, inner cavity volume and bearing capacity of the pneumatic butterfly valve are smoothly and flexibly transmitted with the increase and decrease of the vibration load within the effective stroke. The working principle is shown in the figure. Plane A-A is tangent to the surface of pneumatic butterfly valve capsule. And perpendicular to the capsule axis (a). The pneumatic butterfly valve takes the air inside the pneumatic butterfly valve as the elastic medium. When the air is compressed, the air will produce a reaction force, which will produce an elastic restoring force.