MT164-2007 φ300, φ400, φ500, φ600, φ800, φ1000
1. Usage: Used for positive pressure ventilation with local fans in coal mines, tunnels and underground mines
2, Structure and specifications of dryer
1-Ring d 'end 2-Lifting ring installation line 3-Lifting ring 4-Reverse direction
Allowable error in project size (mm)
Dryer diameter (mm) 300 400 450 500 600 800 1000 0~±6
Dryer length (mm) 5 10 20 0~±100
Note: 1. Air ducts , elbows, tees and wind reducing transition joints with different cylinder sizes or special shapes can be manufactured according to buyer's requirements.
2. If there are special requirements for the specifications of metal accessories such as hair dryer rings and end rings, the specifications should be agreed by both parties.rties.
3. Add cuffs to both ends of the hair dryer and its length L is 150-200mm.
3. Ventilation performance of air ducts
The wind resistance value of an air duct with a diameter of 600 mm per 100 meters is less than 54N s2/M8 and the leakage rate is less than 54N s2/M8. air per 100 meters. is less than 5%.
4. Negative pressure resistance performance of the air duct
When the air duct is subjected to a negative pressure resistance test, its value shall conform to the following table:
Air duct diameter (mm ) Steel wire spacing (mm) Negative pressure resistance (pa)
600 150 ≥3140
600 100 ≥ 4900
5. The shrinkage rate of the diameter of the hair dryer is greater than 1%
VI Marking, packaging, storage and transportation
1. Spray the “Safety Sign” pattern issued. by the Safety Office at a distance of 300 to 400 mm from the extr ringemitted from the air duct.
2. The hair dryer is packed in woven bags, bags, etc.
3. The hair dryer should be kept clean during storage. It is prohibited to come into contact with oil, acids and alkalis or other materials that may damage the quality of the rubber. It should be kept away from direct sunlight. and 1 m from heat sources. The indoor temperature should be maintained at -15+35℃, with relative humidity maintained between 50% and 80%.
4. When transporting the hair dryer, be careful to avoid damage caused by mechanical shock and friction, and keep it away from sunlight and rain.
5. The physical and mechanical properties and safety performance of this product must comply with the standards specified in MT164-87 within a storage period of not more than one year from the release date From the factory.
The local fan in the mines ofcoal should achieve the following points: 1. Use double circuit power supply and have automatic switching function; 2. Implement lock-in protection for wind power and gas power; 3. Install wind protection; Power and gas lockout protection. The cylinder air pressure sensor locking device 4. The air supply volume of the local fan should meet the minimum air volume requirements required for the excavation working face or head tunnel single;The installation position of the local fan should be set on the air inlet side more than 10 meters from the return air outlet; 6. The local fan should be placed with a work record plate for equipment maintenance, inspection and maintenance; The local fan must be placed on a special table, it is prohibited to place itr directly on the floor on the rack; 8. The air duct of the local fan should be tight and waterproof, and there should be a dedicated person to check and handle it every shift. 9. Use special cables, special switches and special transformers.
Local fans of underground coal mines should at least reach the above points to ensure that personnel working in excavation or single-head tunnels can carry out production work safely and to ensure that toxic and harmful gases in the tunnels will not cause problems. harm the human body, to prevent major accidents from occurring.