How to use the Mining Flameproof Contra-rotating Axial Flow Local Fan safely?

Operating and maintaining mining equipment, such as the flameproof contra-rotating axial flow local fan, requires utmost caution. This fan is designed to enhance ventilation in hazardous underground mining environments, but its safety hinges on adhering to strict operational guidelines.

Safety First: Key Operational Precautions

Read the Operation Manual

Before starting, ensure you have thoroughly read the operation manual for both the fan and the motor. Understanding these instructions is crucial to preventing accidents.

Qualified Personnel Only

The fan driver must be adequately trained and qualified to handle the equipment. Only personnel with proper certification should be allowed to operate and maintain the fan.

Check Voltage and Insulation

Ensure that the power network voltage matches the rated voltage of the fan motor. Test the motor’s winding insulation using a meg-ohmmeter to confirm it is above 50MΩ. Only when this value is satisfactory can the fan be safely started.

Secure Wiring and Connections

Verify that all electrical connections are tight, including the fan’s cable and terminal connections. Proper grounding is also essential to prevent electrical hazards.

Inspect Blades and Impeller

Ensure that the fan blades are firmly connected, and that the impeller and shaft are not loose. Prior to starting the fan, manually rotate the impeller to confirm there are no obstructions or friction points.

Safety During Operation and Testing

Set up safety warnings around the air inlet, air outlet, and the motor junction box. Ensure no one is within 2 meters of the air inlet and outlet while the fan is in operation, and avoid any workers standing near these areas during testing. The operating team should stay at least 1 meter away from the fan.

Rotation Direction

During the test run, always confirm that the impeller rotates in the direction indicated by the arrow on the fan’s casing. This is critical for proper airflow and fan performance.

Power Off During Maintenance

Always disconnect the main power loop before disassembling the fan. Never perform maintenance or reassemble the fan while it is still powered on. This safety step prevents electrical shock and other hazards.

Routine Maintenance

Regular maintenance should be carried out every six months. This includes checking the motor, refilling grease, inspecting the impeller for damage, and ensuring the connection between the impeller and shaft remains secure.

Restrictions on Maintenance Location

Do not disassemble or perform maintenance in underground coal mines or areas with explosive gases. These environments present additional risks and require specialized procedures for safety.

Parts Replacement

Only authorized parts should be used for repairs. Never replace fan motor components arbitrarily, as this can compromise safety and performance.

By following these precautions, you can ensure the safe and efficient operation of your mining flameproof contra-rotating axial flow local fan, preventing accidents and ensuring long-term reliability. Remember, any failure to adhere to safety guidelines could result in significant risks, and manufacturers will not be responsible for losses caused by negligence.