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Uses of Airshafts

8/6/2012 7:39:23 AM | by Anonymous


Airshafts can be used in two different applications, in manufacturing or providing ventilation to enclosed spaces. In manufacturing, airshafts are small devices that are used for fitting into a core onto which, materials such as card, plastic and paper are wound. These devices are designed in such a way that when they are fitted onto a core, they quickly expand which allows them to attain a quick and firm attachment. These devices can also be easily deflated which allows them to be easily withdrawn from the core once the winding of a product is completed. Their ability to be mounted and dismounted easily allows them to be used onto bearing housings to enable the winding and unwinding several rolls of stock materials with the minimum effort required to fix an equipment and later remove. Another property of airshafts which makes them ideal devices to be used in manufacturing is the fact that they can grip a core without damaging it. These devices are usually available as lug type that have their bladder down the centre or as strip type that have their bladder located in the periphery of the shaft. An example of the application of these devices can be in slitting machines.


As for the purpose of ventilation, airshaft refers to open spaces that are created in enclosed spaces so that fresh air can flow in and stale air can flow out. An example can be underground mining, here simple holes are bored from the underground operation to the surface, thus allowing fresh air to flow in through these holes and replace the stale air inside. As for the case of homes, airshafts are usually housed in the wall and with the aid of a conduit, the cool or warm air from outside is distributed within the interior space.


The constructions of underground tunnels, mining operations or underground highways all make use of airshafts. In all these cases, airshafts are essential to ensure that there is a steady flow of fresh air so that those working underground get sufficient oxygen supply. In these cases, an airshaft is usually drilled through from the land surface to the underground mining operation caves and tunnels. Through this, fresh air flows through to the bottom of the caves. In many cases, several airshafts are drilled along the working length of the tunnel or cave to make sure that there is a continual flow of fresh air. Also, underground tunnels and highways usually make use of airshafts to supply fresh air from the surface and replace it with stale air underground. However in these cases the airshafts are not simple hole but make use of fans and more complex mechanisms to clear the air out.


In the construction of above ground structures, airshafts are usually included in the plans for construction of that building. They are used to create a network which runs throughout the building, connecting all rooms and spaces in the building by the way of a vent located in the ceiling or walls to let out the air. An example can be the air-conditioning system that runs throughout a structure and releases cool air at various points along its route. The vent used to release air into the building can either be connected to a furnace to provide warm air or an air-conditioner to provide cool air.


The size of these airshafts also varies depending on their application. For example, some airshafts used in mining operations are usually big enough to allow a person to crawl through them. In this case, these airshafts do not only act as ventilation units but also an escape route incase of a collapse of the tunnel or any other emergency.

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