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Taidong Industrial Park, Mount Taishan District, Tai'an, Shandong
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Shandong Mining Non pressure Air Door Factory
Mining combined air door
NegotiableUpdate on 05/11
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Overview
Mining louver adjustable ventilation window is a key equipment in the mine ventilation system, mainly used to adjust the air volume and direction of tunnels or working faces, ensuring the safety and efficiency of underground ventilation. Its core feature is to achieve precise air volume control through an adjustable louver structure, while adapting to complex underground environments.
Product Details
Mining combined air doorMining air damper is a mine ventilation control device that integrates multiple functional modules. It usually consists of two or more air dampers, locking mechanisms, regulating windows, and control systems, aiming to achieve precise airflow control, safe locking, and efficient passage of personnel/vehicles. Its design balances ventilation efficiency and underground operation safety, especially suitable for high gas mines or complex ventilation networks. Here is a detailed analysis:
Mining combined air doorMining regulating air doorStructure and Composition
Main air door unit
Door structure：
Adopting double-layer steel plates with flame-retardant materials (such as rock wool) or all steel welded structures, it has impact resistance, fire and explosion resistance characteristics (in accordance with MT 380 "Coal Mine Ventilation Doors" standard).
The door leaf can be designed as a swing type, split type, or sliding type, with dimensions suitable for the cross-section of the roadway (commonly 2-4m in width and 2-3m in height).
sealing design：
Rubber sealing strips are embedded between the door frame and the door leaf, and an automatic lifting sealing plate is installed at the bottom of the door to reduce air leakage.
Combination function module
Locking linkage device：
Mechanical lockingBy using a linkage mechanism or ratchet device, ensure that the two air doors cannot be opened simultaneously to prevent air flow short circuits.
Pneumatic/electric lockingIntegrate with the mine monitoring system to automatically lock the air door in case of gas overload or fire.
Integrated adjustment of wind window：
Insert louvered adjustable windows at the top or side of the air door, and balance ventilation resistance by manually or electrically controlling the opening.
Access control module：
Vehicle sensing devices (infrared/radar), sound and light alarms, and delayed shutdown systems ensure stable airflow when vehicles pass quickly.
Drive and Control System
Drive Type：
Pneumatic (cylinder+solenoid valve), electric (explosion-proof motor+reducer) or manual (counterweight balance system).
intelligent control：
Integrate PLC or microcontroller to receive signals from gas sensors and wind speed sensors, achieve automatic opening and closing and emergency response.
Mining combined air doorMining regulating air doorWorking principle
Wind flow control
Normal passage：
Vehicle/personnel triggers sensor → first air door opens → enters buffer chamber → first air door closes → second air door opens → automatically closes after passing, maintaining stable airflow throughout the tunnel.
air volume adjustment：
By adjusting the opening of the ventilation window to change the local ventilation resistance, and cooperating with the main fan to achieve dynamic distribution of air volume.
Safe locking
Gas over limit locking：
When the gas concentration is ≥ 1%, the control system cuts off the power/gas source of the air door, forcibly locks it, and activates the sound and light alarm.
Fire isolation：
The temperature sensor triggers → the air door closes+the air window is fully closed to block oxygen supply in the fire area and prevent smoke diffusion.
