- This article is about industrial conveyor belts. For information on the global flow of sea currents, see Thermohaline circulation. The term thermohaline circulation (THC refers to the part of the large-scale ocean circulation that is thought to be driven by global density gradients created by surface heat and
A belt conveyor consists of two or more pulleys, with a continuous loop of material - the conveyor belt - that rotates about them. A pulley (also called a sheave or block) is a Wheel with a groove between two Flanges around its Circumference One or both of the pulleys are powered, moving the belt and the material on the belt forward. The powered pulley is called the drive pulley while the unpowered pulley is called the idler. There are two main industrial classes of belt conveyors; Those in general material handling such as those moving boxes along inside a factory and bulk material handling such as those used to transport industrial and agricultural materials, such as grain, coal, ores, etc. generally in outdoor locations. Generally companies providing general material handling type belt conveyors do not provide the conveyors for bulk material handling. In addition there are a number of commercial applications of belt conveyors such as those in grocery stores.
The belt consists of one or more layers of material they can be made out of rubber. Many belts in general material handling have two layers. An under layer of material to provide linear strength and shape called a carcass and an over layer called the cover. The carcass is often a cotton or plastic web or mesh. The cover is often various rubber or plastic compounds specified by use of the belt. Covers can be made from more exotic materials for unusual applications such as silicone for heat or gum rubber when traction is essential.
Material flowing over the belt may be weighed in transit using a beltweigher. A beltweigher or belt weigher is a piece of industrial control equipment used to gauge the mass or flow rate of material travelling over a Conveyor belt Belts with regularly spaced partitions, known as elevator belts, are used for transporting loose materials up steep inclines. Belt Conveyors are used in self-unloading bulk freighters and in live bottom trucks. Conveyor technology is also used in conveyor transport such as moving sidewalks or escalators, as well as on many manufacturing assembly lines. A moving walkway, moving sidewalk (in the US moving pavement (elsewhere walkalator, travelator, autowalk, horizontal escalator An escalator is a Conveyor transport device for transporting people consisting of individual linked steps that move up or down on tracks which keep the treads An assembly line is a Manufacturing process in which parts (usually Interchangeable parts) are added to a product in a sequential manner using optimally planned Stores often have conveyor belts at the check-out counter to move shopping items. Point of sale or point of service ( POS or PoS) can mean a retail shop, a checkout counter in a shop or the location where a transaction Ski areas also use conveyor belts to transport skiers up the hill. A magic carpet (also carpet lift) is a type of surface lift (like Rope tows T-bar lifts and Platter lifts installed at Ski areas to A wide variety of related conveying machines are available, different as regards principle of operation, means and direction of conveyance, including screw conveyors, vibrating conveyors, pneumatic conveyors, the moving floor system, which uses reciprocating slats to move cargo, and roller conveyor system, which uses a series of powered rollers to convey boxes or pallets. A pallet (ˈpæːlɨt (sometimes called a skid) is a flat transport structure that supports goods in a stable fashion while being lifted by a Forklift, Pallet
The longest belt [conveyor system] in the world is in Western Sahara. Western Sahara ( Arabic: الصحراء الغربية; transliterated: as-Ṣaḥrā' al-Gharbīyah; Sahara Occidental is a territory It is 100 km long, from the phosphate mines of Bu Craa to the coast south of El-Aaiun. A phosphate, an Inorganic chemical, is a salt of Phosphoric acid. Mining is the extraction of valuable Minerals or other geological materials from the earth usually (but not always from an Ore body Bou Craa (Bo Craa Bu Craa Boukra is a town in the Saguia el-Hamra region of northern Western Sahara, south and slightly east of the city of El Aaiún El-Aaiún (also transliterated "Laâyoune" or "El Ayun"( Arabic: العيون transliterated al-`ayūn) is a city in The longest single belt conveyor runs from Meghalaya in India to Sylhet in Bangladesh. It is 17 miles long and conveys limestone and shale. Limestone is a Sedimentary rock composed largely of the Mineral Calcite ( Calcium carbonate: CaCO3 Shale (also called mudstone) is a fine-grained Sedimentary rock whose original constituents were Clay minerals or Muds It is characterized by The Conveyor belt was manufactured in about 300 meter lengths and was joined together and installed on the conveyor at site. The job was carried out by NILOS India Pvt. Ltd. in Chennai India. The Idlers or Rollers for this very special Conveyor was produced and supplied by Kali BMH Systems (P) Ltd, Kumbakonam, India. The Idler Rollers were unique for the project that they were designed to accommodate both Horizontal and Vertial Curves along the terrain.
Conveyors are used as components in automated distribution and warehousing. In combination with computer controlled pallet handling equipment this allows for more efficient retail, wholesale, and manufacturing distribution. Wholesaling is the sale of Goods or Merchandise to Retailers to industrial commercial institutional or other professional Business users Manufacturing (from Latin manu factura, "making by hand" is the use of tools and labor to make things for use or sale Distribution (or place) is one of the four elements of Marketing mix. It is considered a labor saving system that allows large volumes to move rapidly through a process, allowing companies to ship or receive higher volumes with smaller storage space and with less labor expense.
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Belt Conveyor Systems
Rubber Conveyor Belts are commonly used to convey items with irregular bottom surfaces, small items that would fall in between rollers, or bags of product that would sag between rollers. Belt conveyors are generally fairly similar in construction consisting of a metal frame with rollers at either end of a flat metal bed. The belt is looped around each of the rollers and when one of the rollers is powered (by an electrical motor) the belting slides across the solid metal frame bed, moving the product. In heavy use applications the beds which the belting is pulled over are replaced with rollers. The rollers allow weight to be conveyed as they reduce the amount of friction generated from the heavier loading on the belting. Belt conveyors can now be manufactured with curved sections which use tapered rollers and curved belting to convey products around a corner. These conveyor systems and are commonly used in postal sorting offices and airport baggage handling systems. A conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another
 Typical Construction of a Conveyor systems Belt Bend |
 Belt Conveyor systems at a Packing Depot |
 Baggage Handling Belt Conveyor systems |
Snake Sandwich Belt Conveyor
A sandwich belt conveyor uses two conveyor belts, face-to-face, to gently but firmly contain the product being carried, hence making steep incline and even vertical-lift runs easily achievable. A conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another A conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another A conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another The Snake Sandwich Belt Conveyor was created in 1979. The study was conceived by Joseph A. Dos Santos, P. E. , President of Dos Santos International, with the help of a grant from the U. S. Bureau of Mines. The study was to develop a means of moving and elevating large quantities of bulk materials, including coarse products such as rocks, aggregate, coal, etc. at the steepest possible inclines. The intent was to use only existing and generally available hardware in order to achieve the most economically feasible and easily maintained steep-angle conveyor design. Snake Conveyors are available in widely ranging profiles of C and S Shape. In any case, a long bottom belt approach is possible to the sandwich entrance, and discharge may be on the high incline or may be after the extension of the carrying belt beyond the mouth of the sandwich. Snake Sandwich conveyors offer several advantages. First unlimited conveying capacity, a system suitable for the most rugged mine applications and gentle on sensitive and friable materials, high availability and low operating and maintenance costs, smooth surfaced belts allowing continuous belt cleaning by scrapers and plows. This also facilitates intermediate material discharge by belt plows, as appropriate, before and/or beyond the sandwiched part of the Snake profile. All conventional conveyor hardware insures economy and fast delivery of replacement parts.
Vibrating Conveyor Systems
A Vibrating Conveyor is a machine with a solid conveying surface which is turned up on the side to form a trough. They are used extensively in food grade applications where sanitation, washdown, and low maintenance are essential. Vibrating conveyors are also suitable for harsh, very hot, dirty, or corrosive environments. They can be used to convey newly cast metal parts which may reach upwards of 1500°F. Due to the fixed nature of the conveying pans vibrating conveyors can also perform tasks such as sorting, screening, classifying and orienting parts. Vibrating conveyors have been built to convey material at angles exceeding 45° from horizontal using special pan shapes. Flat pans will convey most materials at a 5° Incline from horizontal line.
Flexible Conveyor Systems
The flexible conveyor is based on a conveyor beam in aluminium or stainless steel, with low friction slide rails guiding a plastic multi-flexing chain. WikipediaNaming Products to be conveyed travel directly on the conveyor, or on pallets/carriers.
Pneumatic Conveyor Systems
Every pneumatic system, makes use of pipes or ducts called transportation lines that carry mixture of materials and a stream of air. These materials are such as dry pulverised or free flowing or light powdery materials like cement, fly ash etc. These materials can be transported convieniently to various destinations by means of a stream of high velocity air through pipe lines. Products are moved through various tubes via air pressure, allowing for extra vertical versatility. Pneumatic conveyors are either carrier systems or dillute-phase systems; carrier systems simply push items from one entry point to one exit point, such as the money exchanging tubes used at a bank drive-thru window. Dillute-phase systems use push/pull pressure to guide materials through various entry and/or exit points. Three basic systems that are used to generate high velocity air stream: 1. Suction or Vacuum systems: utilizing a vacuum created in the pipeline to draw the material with the surrounding air. The system operated at a low pressure, which is practically 0. 4-0. 5 atm below atmosphere, and is utilized mainly in conveying light free flowing materials. 2. Pressure Type systems: in which a positive pressure is used to push material from one point to the next. The system is ideal for conveying material from one loading point to a number of unloading points. It operates at a pressure of 6 atm and upwards. 3. Combination systems: in which a suction system is ised to convey material from a number of loading points and a pressure system is employed to deliver it to a number of unloading points.
History
Primitive conveyor belts were used since 19th century. The 19th century of the Common Era began on January 1, 1801 and ended on December 31, 1900, according to the Gregorian calendar In 1901, Sandvik invented and started the production of the Steel Conveyor belts. Year 1901 ( MCMI) was a Common year starting on Tuesday (link will display calendar of the Gregorian calendar (or a Common year starting Sandvik is a Swedish company founded in 1862 by Göran Fredrik Göransson in Sandviken. Steel is an Alloy consisting mostly of Iron, with a Carbon content between 0 In 1905 Richard Sutcliffe invented the first conveyor belts for use in coal mines which revolutionized the mining industry. Year 1905 ( MCMV) was a Common year starting on Sunday (link will display full calendar of the Gregorian calendar (or a Common year starting Richard Sutcliffe ( January 26 1849 - July 23 1930) was an Irish-born British mining engineer and inventor Coal mining is the extraction or removal of Coal from the Earth by Mining. In 1913, Henry Ford introduced Conveyor belt-based assembly-line in Ford Motor Company's Rouge factory in Dearborne Michigan. Year 1913 ( MCMXIII) was a Common year starting on Wednesday (link will display the full calendar of the Gregorian calendar (or a Common Henry Ford ( July 30, 1863 &ndash April 7, 1947) was the American founder of the Ford Motor Company and father of Ford Motor Company is an American Multinational corporation and the world's fourth largest automaker based on Worldwide vehicle sales, following
See also
- Thermohaline circulation
- Treadmill
- Conveyor systems
- Lineshaft roller conveyor
- Chain conveyor
- Conveyor belt from French Wikipedia
- Conveyor belt from German Wikipedia
- Conveyor belt from Italian Wikipedia
- Technical, Records, Nomenclature
External links
- 10 ways to improve conveyor performance
- Power Conveyors (Graphics of & Common Uses for) - Includes Belt Type Conveyors