Telescopic air duct for ventilation and air extraction in tunnel construction
The construction ventilation method of the tunnel should be determined according to many factors such as the length of the tunnel, the size of the section of the excavation tunnel, the construction method and the equipment conditions. In construction, there are two types of natural ventilation and forced mechanical ventilation. Natural ventilation is a way to achieve ventilation by using the temperature difference or wind pressure difference between inside and outside the tunnel. It is generally limited to short straight tunnels and is affected by the weather conditions outside the tunnel. The impact is great, so it is less dependent on natural ventilation. Most tunnels should use forced mechanical ventilation, then telescopic ventilation hoses must be used, which is to use ventilation pipes to connect fans to outside for ventilation or exhaust.
The tunnel mine ventilation hose is made of plastic rubber bone wrapped with steel wire as the skeleton, with orange plastic mesh cloth as the tube body, stringed ropes at both ends of the tube openings can be easily connected to the air outlets, and there is one every one meter at the tube body. The metal lifting ring can easily fix the air duct. Its temperature resistance limit is -30-120 degrees, and its flame retardant index is above B1. It has the characteristics of acid and alkali resistance/high temperature resistance/abrasion resistance and aging resistance. The product is flexible and flexible, free in connection, light in size, easy to carry, high temperature resistance, acid and alkali resistance, flame retardant, and insulation.
Expandable air duct with ventilation equipment is widely used in the supply and exhaust of the computer room, basement, tunnel, municipal pipeline engineering, underground cable maintenance, mechanical shipbuilding engineering, fire rescue smoke exhaust and other harsh working environments. use. It is also an indispensable choice for portable exhaust fans! The size and length of the Hangzhou Haikuo telescopic duct can be customized according to customer requirements, and the maximum length can be 50 meters.