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Flexowell. 25 Years of experience in steep angle and vertical conveying
Abstract
With over 25 years of experience and more than 40,000 installations worldwide Flexowell introduces itself as a competent partner for the stringent requirements brought on by the need for economically and ecologically compatible bulk handling systems. This article highlights the developments in vertical conveying including the joint efforts with worldwide operating partners for shaft and tunnelling works, underground mining, self-unloading vessels and quay-installed continuous ship-unloaders and with a view to future applications.
This article provides a brief historical account of the evolution of the FLEXOLIFT system introduced to the tunnel construction industry in 1979. The outstanding success of this tunnel muck hoisting concept led to the development of the world's highest, continuous single lift vertical conveyor system as previously reported in bulk solids handling which went into production at the third New York City Water Tunnel Project in September, 1996. It is also a review of the amazing New York City Water Tunnel Project and highlights the City Tunnel No. 3, Stage 2, Contract 542 by the joint venture contractor Grow/Perini/Skanska through installation and proven performance of the first POCKETLIFT system with a vertical lift of 208 m (682′) designed by Lake Shore Mining and Svedala Flexowell.
In all areas of conveying and transshipment of bulk materials, it is more important than ever to pay careful attention to the cost/benefit ratio. This applies equally to capital investment and the ongoing costs for operating and maintenance [1]. Bulk materials handling and transport today require environmentally acceptable, dust-free and noiseless operation as well as a high degree of functional reliability coupled with a long system service life. Belt conveyors have generally been recognized as one of the most economical methods of handling bulk materials as they adapt themselves to continuous handling of ore, coal, etc. Belt conveyors offer benefits of reduced supervision, lower maintenance costs, minimum product degradation and downtime. Conveying systems such as belt conveyors, belt and chain elevators, pocket elevators and skip excavators have reached their capacity limits and are unable to meet today's ecological demands. The vertical FLEXOLIFT® conveying system offers new solutions to today's conveying problems. This article details the development from trough conveyor belts to continuous steep angle and vertical belt conveying. It also describes some applications since the first vertical FLEXOLIFT® conveyor was utilized in a deep tunnel project in Chicago in 1979, and the most recent innovation in the field of steeply inclined and vertical conveying in the bulk material handling industry - the FLEXOWELL® POCKETLIFT®.
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