Mine Automatic Pressure-Free Air Door

Core Advantages

1. Automation and Intelligence: No manual operation required; infrared sensing enables automatic opening and closing, reducing personnel dwell time and enhancing safety (e.g., avoiding sparks from human contact with metal components in underground gas environments).
2. Strong Wind Pressure Adaptability: The pressure-balanced structure equalizes environmental wind pressure, allowing the door to open easily in both positive and negative pressure environments, preventing jamming or damage caused by excessive wind pressure in traditional air doors.
3. High Safety:
   • Pneumatic drive eliminates electrical sparks, making it suitable for flammable and explosive environments;
   • Anti-pinch function automatically stops or reverses the door when obstruction is detected during closing;
   • Interlock design prevents air short-circuiting, ensuring ventilation system stability.
4. Durability and Low Maintenance: The pressure-balanced structure reduces mechanical wear; pneumatic components are simple in design with low failure rates. Routine maintenance only requires periodic checks of air pressure, cleaning of sensors, and replacement of sealing strips.
5. Improved Passage Efficiency: Rapid response to sensing signals, smooth opening/closing actions, suitable for continuous passage of personnel and vehicles, reducing waiting time.

Maintenance Points

• Pneumatic System: Regularly check compressed air pipelines for leaks, ensure pneumatic valves and cylinders operate smoothly, clean impurities from filters promptly, and maintain stable air pressure (typically 0.4-0.6 MPa).
• Sensing System: Clean dust and moisture from infrared sensor surfaces, calibrate sensing distance and sensitivity to avoid false triggers or sensing failures.
• Door Body and Seals: Inspect door hinges for looseness, check sealing strips for aging or damage, tighten or replace as needed to ensure sealing performance.
• Control System: Periodically test interlock function, delayed closing, fault alarms, and other logic functions; back up control programs to prevent system failures.