PVC Semi Rigid Duct For is a special device that utilizes the wall attached effect of airflow, mainly used in mining excavation work, especially in dust removal, showing significant effects.
At the beginning of coal cutting, the baffle inside the attached wall air duct will be erected, causing the axial airflow supplied by the original pressure driven air duct to the mining face to change to rotating airflow along the tunnel wall. This rotating airflow blows towards the surrounding walls and the entire cross-section of the roadway at a certain speed, and continuously advances towards the mechanized mining face. Under the combined action of the axial velocity generated by the dust collector's intake of dust containing airflow, a spiral shaped airflow with high efficiency is formed. This spiral airflow establishes an air screen in front of the driver of the tunneling machine to block the outward diffusion of coal dust, effectively blocking the coal dust generated during the operation of the tunneling machine, allowing it to pass through the vacuum hood and be sucked into the dust collector for purification, thereby avoiding the outflow of coal dust and greatly improving the dust reduction efficiency of the mining face.
In addition, wall mounted air ducts are also used for dust removal in high gas mines. By using a pressure air diversion type wall mounted air duct and partially supplying air directly to the excavation face, the accumulation of harmful gases in the dead corners of the excavation face is avoided; Another part of the air flow flows out from the side of the wall mounted air duct, forming an air curtain that further suppresses the diffusion of dust. This design not only improves the dust removal efficiency, but also effectively replenishes air for the excavation working face.
There are two main types of wall mounted air ducts: rigid wall mounted air ducts and flexible wall mounted air ducts. Flexible wall mounted air ducts have the advantage of easy installation and transportation, and are therefore widely used. However, flexible wall mounted air ducts also have some shortcomings, such as high airflow loss, resulting in a short distance of the wall's action, poor stability, and difficulty in adjusting airflow.
In general, the PVC Semi Rigid Duct For is an important dust removal equipment in mine excavation work. By effectively utilizing the wall attached effect of the airflow, it greatly improves the dust removal efficiency of the working face and improves the working environment.
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