Pneumatic two-way pressureless damper is a kind of equipment widely used in mines, and its main function is to stabilize the wind direction, ensure ventilation safety, and prevent the phenomenon of cross-wind. The main advantage of this damper is its robustness and long life, making it the product of choice for both mines and non-mines.
The working principle of a pneumatic two-way pressureless damper is fairly simple. It opens the damper by means of a compression control button in the cylinder, as well as a return flow status and a pressure relief button for emergency door opening. When the A door is opened, the magnetic valve A (mounted on the A door) acts to open the air supply and locks the B door when pressurized air is obtained. When Gate A is closed, the magnetron valve A resets and cuts off the air supply, and Gate B is locked while unlocking Gate B. If Gate A cannot be closed, then Gate B cannot be unlocked. At this time, pedestrians can unlock the B door by pulling the unlock valve B of the B door control box. The same is true when the b-door is opened.
The pneumatic two-way pressureless damper is cleverly designed, with the two doors opening and closing in opposite directions and connected together by a balance bar, so that the pressure on the entire door cancels each other out. This design not only makes the damper more stable, but also prolongs its service life. Each door leaf is designed with an adjustable windshield, which can not only adjust the ventilation volume, but also open the sliding wind deflector or rotate the louver blades before manually opening the pressureless damper to increase the ventilation section and reduce the stress area of the damper, thereby reducing the pressure of the two-way pressureless damper for mining. After the miner passes through the underground damper of the coal mine, the adjusting windshield is closed to restore the ventilation surface to its original level.
In addition, the pneumatic two-way pressureless damper has a number of other functions. In addition to installing the damper window, the observation window is often installed on the door leaf to observe the opening and closing status of the dividing damper and prevent the miner from misoperating on one side of the biparting pneumatic two-way pressureless damper. This design not only improves the safety of miners, but also improves work efficiency.
In general, the pneumatic two-way pressureless damper is a very practical equipment, which has a simple working principle and easy operation, which can effectively ensure the ventilation safety of the mine.