Coal mine corrugated board iron air door

Coal mine corrugated board iron air doorWith its high strength, impact resistance, corrosion resistance, and intelligent control characteristics,Mainly used in high gas mines, high-pressure ventilation systems, soft rock tunnels, frequent opening and closing scenarios, and low temperature, high humidity or harmful gas environmentsThe specific scope of use is as follows:

1Coal mine corrugated board iron air doorThe main intake and return air ducts of high gas mines

• Gas management requirementsHigh gas mines require strict control of airflow direction to prevent gas accumulation. The corrugated iron air door achieves a leakage rate of ≤ 0.5% through double-layer sealing technology (compression sealing strip+magnetic sealing edge), ensuring that the gas concentration is below the safety threshold.

• explosion-proof performanceThe door body is made of Q235 carbon steel or stainless steel, with an anti-static coating sprayed on the surface to prevent gas explosions caused by electric sparks. Some models have passed Ex d I Mb explosion-proof certification and are suitable for gas outburst areas.

• Application CasesAfter installing corrugated iron air doors in the main air intake duct of a high gas mine, the accident rate of gas exceeding the limit decreased by 65%, and the stability of the ventilation system was significantly improved.

2、 High pressure ventilation system (such as near the outlet of the main fan)

• pressure resistanceThe door structure is designed to be thick (thickness ≥ 6mm) and can withstand wind pressure of 0.5-1.2MPa, avoiding deformation or damage caused by pressure differences.

• Balance mechanismEquipped with pneumatic or electric balancing devices to ensure smooth opening and closing of the air door in high-pressure environments, reducing mechanical impact.

• data supportActual testing shows that under a wind pressure of 0.8 MPa, the opening and closing time of the air door is ≤ 3 seconds, meeting the rapid adjustment requirements of the high-pressure ventilation system.

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3、 Soft rock roadway and surrounding rock deformation area

• Anti deformation designFill the gap between the door frame and the wall with flame-retardant rubber strips (thickness ≥ 20mm), which can absorb the deformation stress of the surrounding rock in the tunnel. When the compression of the rubber strip reaches 50%, the door frame still remains in contact with the wall, and the sealing performance is not affected.

• Installation methodThe door frame is fixed to the roof and floor of the tunnel through anchor rods (depth ≥ 1.5m) to adapt to the geological conditions of soft rock tunnels.

• long-term stabilityAfter using corrugated iron air doors in a soft rock mine, maintenance costs were reduced by 60% and the service life was extended to over 10 years.

4、 Roadways that require frequent opening and closing (such as excavation faces and return air tunnels)

• lightweight designUsing corrugated iron plates, the weight is reduced by 40% compared to traditional solid steel plates, and the weight of a single door body is ≤ 300kg, making it easy to manually transport and quickly install.

• Automation controlEquipped with pneumatic or electric drive system, supporting remote control and automatic adjustment. For example, by using a PLC controller to achieve seamless adjustment of the air door from 0 to 90 degrees, it can adapt to changes in parameters such as gas concentration and air pressure.

• Efficiency improvementAfter the renovation of a certain mine, the opening and closing time of the air door was shortened from 10 seconds to 2 seconds, and the effective ventilation volume of the excavation face was increased by 40%.

5、 Low temperature, high humidity or hazardous gas environment

• corrosion resistanceThe surface of the door is hot-dip galvanized or coated with epoxy resin anti-corrosion layer, which is resistant to moisture and acidic gas corrosion. In an acidic environment with a pH value of 4-6, the elasticity retention rate is ≥ 90% after soaking for 24 hours.

• Sealing and ventilation balanceThrough special sealing strip design, it allows for moderate air circulation while preventing harmful gas leakage, avoiding local oxygen deficiency.

• Applicable scenariosSuitable for low temperature, high humidity, or hazardous gases such as hydrogen sulfide (H ₂ S) and sulfur dioxide (SO ₂) in metal mines, tunnels, and other work environments.