Research Category: Conveyor System
Researchers: BEUMER Developers|
Location: BEUMER Group, Germany
In many years of research work the
BEUMER Group developed high-capacity belt
and chain bucket elevators that need only a fraction of the energy when compared
with pneumatic conveyor systems. The basis for this success is the research and
development work that the machine tool manufacturer's engineers conduct in its
in-house testing centre. With its developments, BEUMER, located in Beckum,
massively influenced the technology of modern bucket elevators.
For many years now, bucket elevators produced and supplied by the BEUMER Group
have convinced its customers. The operationally safe installations permit
economically viable vertical conveying in many industrial sectors and are
indispensable for successful conveying operations. As one of the market leaders,
with practice-oriented development of high-capacity belt and central chain
bucket elevators, the BEUMER Group has definitively shaped the model designs
currently in use. Extraordinary in this context has been achievement of the
world's largest bucket elevators with center distances of over 150 m and volume
flows of 1,800 m²/hour.
Central chain is easy to assemble
Extraordinary work conditions and materials require the highest level of quality
and precision. The BEUMER central chain bucket elevators reliably move lumpy,
hot and abrasive conveyor loads like clinker, clinker chip or limestone ballast.
The BEUMER high-capacity central chain bucket elevators are convincing not only
with their safe and simple assembly: The innovative central chain, developed
specially by BEUMER, ensures economical deployment with its precise tensile
strength gradations. The bolt of the BEUMER central chain with its high core
stability and its hardened surface offers permanent wear-resistant operation.
Essential structural units of the BEUMER high-capacity central chain bucket
elevator are the bucket elevator head and the foot.
The bucket elevator head comprises the functional grouping of the drive wheel
with the shaft, the drive unit and the material discharge. Power transmission to
the central chain is accomplished frictionally engaged via a drive wheel with a
non-interlocking replaceable tread. The CrMO based running treads used are
partially hardened and offer permanently optimum chain control. The drive unit
is fitted with a hydrodynamic liquid coupling as start-up aid and overload
safety. An adjustable discharge lip in the area of the load discharge minimises
load backflow. For inspection and maintenance work corresponding service flaps
are provided for at appropriate points in the bucket elevator housing.
BEUMER's bucket elevator foot also offers several specialties: During the
loading process in the bucket elevator foot the central chain and the buckets
are led through a return chain wheel. The weight-activated parallel take-up
device thereby assures optimum running and guide conditions of the chain on the
tension chain wheel at the foot of the elevator. A filling level detector here
as a safety device to protect against overfilling due to uncontrolled feed of
material into the bucket elevator foot.
Highly varied graining
Fine-grained or even powdery products in mass flows are optimally moved by the
BEUMER high-capacity belt bucket elevators. In doing so, the material graining
determines the type of bucket attachment: with a grain size of up to 25 mm
segment mountings are used. BEUMER rubber-batten mountings are used with grain
sizes between 25 and 60 mm that can be deployed up to 70 °C. The belt's long
service life offers a belt clamping connection for steel wire belts as traction
elements, specially developed by BEUMER. For high-capacity belt bucket elevators
with large center distances additionally a monitoring switch is used to
continuously monitor the belt clamping connection's proper seating. With the
safety switch developed by BEUMER such monitoring can be achieved reliably and
without wear and tear with reliable contactless technology.
Flawless technology convinces the Grasim Cement GroupThe Indian Grasim Cement
Group decided back in 1997 on quality products from the BEUMER Group. This was a
matter of the world's highest bucket elevator with a total height of 122.5
metres. The high-capacity belt bucket elevators then supplied were only given a
first inspection after six years of operation at the request of the
manufacturer. Even now the installation is still running trouble-free.
With production of 32 million tons of cement per year and a 22 percent total
share of the market, Grasim Cement is India's largest cement manufacturer. In
the course of the cyclical boom for the construction material industry there the
company's success is constantly on the rise. In 2004 Grasim took over the
UltraTech Cement Works from Larsen and Toubro. The BEUMER Group in September
2006 received from the Grasim Cement Group the major order for delivery of a
package of 47 bucket elevators for their new cement works (3 x 3.5 million tons
The order for the Grasim Cement Group includes high-capacity belt and central
chain bucket elevators in different sizes and with different capacities. With
this package BEUMER is supplying six high-capacity belt bucket elevators that,
with center distances of 145.65 metres, are amongst the highest in the world.
Two such belt bucket elevators load one of the three high-capacity kilns with
raw meal. With a bucket width of 1,000 millimetres the conveying capacity is
about 550 tons of raw meal per hour. These bucket elevators are fitted with
high-strength BEUMER steel wire belts with ranges free of steel wire.
Note for Bucket Elevator
A bucket elevator, also called a grain leg, is a mechanism for hauling flowable
bulk materials (most often grain or fertilizer) vertically.
It consists of: 1. Buckets to contain the material; 2. A belt to carry the
buckets and transmit the pull; 3. Means to drive the belt; 4. Accessories for
loading the buckets or picking up the material, for receiving the discharged
material, for maintaining the belt tension and for enclosing and protecting the
A centrifugal discharge elevator may be vertical or inclined. Vertical elevators
depend entirely on the action of centrifugal force to get the material into the
discharge chute and must be run at speeds relatively high. Inclined elevators
with buckets spaced apart or set close together may have the discharge chute set
partly under the head pulley. Since they don't depend entirely on the
centrifugal force to put the material into the chute, the speed may be
Nearly all centrifugal discharge elevators have spaced buckets with rounded
bottoms. They pick up their load from a boot, a pit, or a pile of material at
the foot pulley.
The buckets can be also triangular in cross section and set close to on the belt
with little or no clearance between them. This is a continuous bucket elevator.
Its main use is to carry difficult materials at slow speed.
Early bucket elevators used a flat chain with small, steel buckets attached
every few inches. Current construction uses a rubber belt with plastic buckets.
Pulleys several feet in diameter are used at the top and bottom. The top pulley
is driven by an electric motor.
The bucket elevator is the enabling technology that permitted the construction
of grain elevators. A diverter at the top of the elevator allows the grain to be
sent to the chosen bin.
A similar device with flat steps is occasionally used as an elevator for humans,
e.g., for employees in parking garages. (This sort of elevator is generally
considered too dangerous to allow use by the public.)
Note for Conveyor Belt
A belt conveyor consists of two or more pulleys, with a continuous loop of
material - the conveyor belt - that rotates about them. 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
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.
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. Stores often have conveyor belts at the
check-out counter to move shopping items. Ski areas also use conveyor belts to
transport skiers up the hill. 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
The longest belt in the world is in Western Sahara. It is 100 km long, from the
phosphate mines of Bu Craa to the coast south of El-Aaiun. The longest single
belt conveyor runs from Meghalaya in India to Sylhet in Bangladesh. It is 17
miles long and conveys limestone and shale. 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.
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. 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.
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.
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.
About BEUMER Corporation
BEUMER Corporation, with main offices in Branchburg, NJ, and sales offices in
Marietta, GA, is a company specializing in the design and supply of material
handling and sortation systems. BEUMER Corporation is part of the BEUMER Group,
headquartered in Beckum, Germany.
For over 30 years, BEUMER Corporation has been responsible for sales,
engineering, local manufacturing, service, and spare parts support to a customer
base that includes many industrial and service sectors.
BEUMER Corporation serves the United States, Canada, Mexico, Central America and
Our mission statement “Our goal is not the short-term profit, but the long-term
success” has never been more appropriate than today and has allowed us to build
a strong customer base. For details about BEUMER installations and your local
BEUMER representative, please select from the menu.
Basis for BEUMER's success is the family spirit in its globally operating
organization. Shareholders, management and employees form a team in which mutual
co-operation is the key element. The owners' willingness to continuously invest
in the family-owned company is a prerequisite for securing the company's future.
Traditional values and experiences complement each other and result in dialogue
between the generations and new ideas and thoughts. For many years BEUMER has
been offering training to young people to give them the chance to establish the
basis for a successful professional life. The contact to universities and
colleges, in the form of academic studies, builds the bridge to science and
provides a pool of qualified junior employees. Even in today's time of
information exchange, we continue to cherish the personal contact with our
customers. The employees and the local representatives of BEUMER are always at
your disposal for suggestions, questions or advice.