Pneumatic Mine Door For Deep Mining

The pneumatic pressure-balanced mine door is a core ventilation equipment designed specifically for high wind pressure environments in deep mines. It enables precise control of airflow under complex underground conditions, ensuring the stability of mine ventilation systems and the safety of personnel passage. This door adopts a pneumatic power system and pressure-balanced structure, requiring only 150N of opening force regardless of the magnitude or direction of roadway wind pressure

The pneumatic pressure-balanced mine door breaks the design limitation of traditional mine doors relying on wind pressure. Through mechanical balance principles, it converts external wind pressure into internal force, achieving bidirectional closed control without the need for additional reverse mine doors.

It remains normally closed under normal conditions. After detecting personnel/vehicle passage signals through infrared sensors. After passage, it automatically closes and triggers the locking device. When roadway wind pressure changes abruptly, the balance mechanism decomposes external pressure into internal stress, ensuring the door leaves close stably and avoiding airflow short circuit.

• Pour C30 concrete foundation at the roadway connection opening and embed the door frame ;
• Install the door leaf and pneumatic actuator, connect compressed air pipelines (maintain pressure at 0.8-1.1MPa);
• Debug infrared sensors and locking system, test bidirectional opening and closing functions;
• Conduct wind pressure tightness test to confirm air leakage rate meets standards.

1. Press the control button at the door or trigger infrared induction before personnel/vehicle passage;

2. Pass quickly after the door leaves open, and do not stay in the door area;

3. The door leaves automatically close after passage, confirm the locking indicator light is on;

4. Check pneumatic pipeline pressure and sealing strip wear weekly, test emergency manual opening function monthly.