Special conveyor belt systems – Taking conveyed material safely around the corner
We always have the optimum conveying solution for any situation thanks to our bunker, movable, reversible or tunnel belt conveyors.
Our curved belt systems enable us to handle particularly tight curve radii of less than 200 meters, e.g. in metro tunnel construction. Intermediate drives, or so-called boosters, reduce the forces exerted on the conveyor belt as it approaches the bend, thereby ensuring that material is safely conveyed around the corner. But they are also of advantage even on longer straights: the belt force reduction effected by the booster means that the conveyor belt can be designed for lower forces. And this translates into considerable financial savings.
H+E reversible belts transport material in both directions and are used for efficiently loading with building materials, for example.
Lifting table for upper run conveying
The lifting table designed by H+E offers the possibility to convey the material on the upper belt into the tunnel using the existing tunnel belt structure and heap the material on the invert using a scraper table.
The lifting table is designed so as to enable it to be dismantled into two halves facilitating easy and swift assembly anywhere in the existing belt carrier rack.
The lifting table is controlled by a compressed air pad which can be operated using a standard compressed air cylinder or a compressed air line of 7-10 bar. An electric version is also possible.
Scraper table for lower run conveying
After the breakthrough and driving of a tunnel section, the invert is usually filled with concrete to achieve an even level for transport or rail-bound vehicles at a later stage.
The concrete loading process designed by H+E offers the possibility to convey the concrete on the lower belt into the tunnel using the existing tunnel belt structure and distribute it on the invert by means of controlled travel by a scraper table.
The use of this system makes a significant contribution toward improving the efficiency of tunnel excavation work.
This system involves a modified belt conveyor for transporting concrete, usually comprising the following components:
- Lower belt loading (concrete loaded in front of the portal, conversion of the conveyor belt system)
- Invert loading (concrete scraper table)
- Invert filling (concrete distribution trolley / pivoting belt conveyor)