Ventilation is the first line of safety for underground mines and tunnel excavation projects. In working environments with flammable and explosive gases such as gas and coal dust, ordinary ventilation equipment cannot meet explosion-proof safety requirements. Mine explosion-proof contra-rotating axial fan is professional ventilation equipment specially built for high-risk underground ventilation scenarios.
Product Overview
Our mine explosion-proof fan (FBD / FBCD series contra-rotating axial fan) includes forced draft type and exhaust type. The whole machine obtains MA coal safety certification and explosion-proof qualification, with explosion-proof mark Ex d I Mb. It is suitable for coal mines, metal mines, water diversion tunnels, highway and railway tunnel excavation ventilation. It delivers fresh air to working faces, exhausts gas, dust and harmful waste gas, dilutes the concentration of dangerous underground gas and protects operators.
The fan adopts a two-stage contra-rotating impeller structure. Two explosion-proof motors drive two stages of impellers to rotate in opposite directions separately. It does not require complex guide vane structures, featuring high wind pressure, large air volume and long air supply distance. It supports two-stage simultaneous operation or single-stage independent operation, adapting to changing tunnel lengths and different ventilation resistance conditions for flexible energy saving.
Key Advantages
- Explosion-proof & Safe for Hazardous Environments Equipped with special flameproof explosion-proof motors. The sealed motor structure prevents electric sparks from igniting gas and coal dust. The whole unit is designed with anti-static and anti-friction spark features, meeting standards for underground coal mine environments with explosive gas, stable and reliable.
- Contra-rotating Structure, Strong Air Pressure & Airflow The reverse contra-rotating design of two-stage impellers greatly improves pressure efficiency with outstanding long-distance air supply capacity. It works stably for deep wells and long tunnel excavation. The twisted 3D flow blades reduce wind resistance and improve operating efficiency to cut power consumption in long-term operation.
- Flexible Working Modes with Graded Operation Support full two-stage operation or single-stage independent operation. Run single-stage for short tunnels and low resistance to save energy; activate two-stage linkage when tunnels extend and resistance rises to adjust ventilation capacity as required, covering the whole excavation cycle of projects.
- Low Noise, Optional Silencer Box Can be equipped with integrated silencer box to effectively reduce running noise, ease noise pollution at mining and tunnel construction sites and meet environmental protection requirements. The rigid base ensures stable structure with low vibration during operation.
- Durable Structure & Easy Maintenance Thickened steel plate welded cylinder with anti-corrosion paint, adapting to harsh site conditions with high humidity and heavy dust. Modular split design facilitates hoisting, transportation and fast on-site installation, bringing convenient later inspection and maintenance.
Main Application Scenarios
- Local ventilation for excavation faces in underground coal mines (forced air supply, exhaust gas drainage)
- Ventilation for underground roadways of non-coal mines and metal mines
- Construction ventilation for highway, railway and water diversion long tunnels
- Ventilation for other underground works with flammable and explosive gases
Specification & Customization
- Wide power range, compatible with common mining voltages: 380V / 660V / 1140V / 6kV
- Caliber, air volume and wind pressure can be customized according to roadway length, cross-section and ventilation resistance
- Optional accessories: silencer, reducer adapter, mobile base, monitoring control assembly
- Factory pre-testing and on-site installation guidance available
Conclusion
Ventilation comes first for mine safety. A stable, compliant and efficient explosion-proof ventilation fan is an essential safety guarantee for underground construction. We focus on the R&D and manufacturing of mine explosion-proof ventilation equipment. All fans are manufactured and inspected strictly in accordance with coal safety standards, with sufficient stock for fast delivery to construction sites. We also provide ventilation scheme selection, technical support and after-sales service.
If you have ventilation demands for tunnels or mines, feel free to contact us. We will provide customized selection plans and quotations based on your working conditions!