A screw conveyor uses a spiral inclined plane to move material and can be used in agriculture and industry. Flexible screw conveyors allow movement in any direction and can be used around obstacles. The device has been used since at least 235 BC for irrigation and in diverse applications such as pumps in wastewater treatment plants and blood pumps.
A screw conveyor is a device that uses a spiral inclined plane to move material. The spiral of the auger is stretched for the distance to travel and is placed in a trough or completely enclosed in a cylinder. One end of the auger is brought into contact with a liquid, semi-solid or granulated substance. When the spiral is rotated, it forces the substance to move along the trough or cylinder. Other names for the device include screw conveyor, spiral conveyor and screw conveyor.
Screw conveyors can be a frequent site in agricultural applications, where they can be used to move grain or other bulk materials. The conveying auger, or auger, can be easily identified in this application, as it commonly requires only one channel, leaving the top half of the auger visible. Examples of this type of application can be seen putting grain in or out of a silo or filling a bin on the back of farm machinery.
Agriculture and industry may also employ flexible screw conveyors, which require a complete enclosure, usually a hose. Aside from the most obvious feature – flexibility – the flexible screw conveyor can differ from other types of conveyors in that the screw typically does not make contact with the walls of the casing. It is also commonly without a cylindrical core and the screw resembles a spring with flattened coils. Flexible screw conveyors allow you to move substances between places where a straight hose won’t work, both around simple obstacles and across floors and walls, as well as in virtually any direction or at any angle. This also allows the screw conveyor system to be moved between mining or delivery sites, just like a pipe.
The cochlea may also be known as the Archimedean cochlea, as the discovery of the principle behind it is sometimes attributed to the Greek mathematician Archimedes. Regardless of the true innovator, the device has been used since at least 235 BC in Egypt to move water for irrigation. The screw in this application is usually wound around a cylindrical core and can be placed in a trough or cylinder. The device is typically positioned at a slight angle so as to lift water from one level of the irrigation channel to another. This use of screw conveyors can also be seen in applications as diverse as pumps in wastewater treatment plants and blood pumps, medical devices used to maintain blood circulation during heart surgery.
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