BEUMER offers innovative conveyor technology
BEUMER offers innovative conveyor technology
High-capacity bucket elevators convince professionals
Beckum, 20 July 2007. 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 per year).
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.
