|© 2007 Plasser India|
|HOME COMPANY PROFILE MACHINES||
VM 170 Jumbo
Vacuum scraper-excavation technology – an alternative method of excavation for all kinds of material
Engineers know that there are certain spots in the track which are difficult to reach or track hindrances which obstruct or even prevent the application of conventional technology. The maintenance of these has to be performed manually which is labour-intensive and time consuming and therefore costly.
The VM 170 JUMBO is an economical alternative for the excavation or removal of various materials using vacuum extraction wherever obstacles hinder or prevent the efficient use of conventional methods.
Composition of the machine
Advantages of the VM 170 JUMBO
Application of the vacuum scraper-excavator technology offers an extremely cost-efficient and also universally applicable method of work. The main advantages of the VM 170 JUMBO are:
How the vacuum scraper excavator unit works
Material is picked up by the rotating scraper-excavator nozzle (200 mm diameter on standard model) and transported through the flexible vacuum tube to the material separator. Exact guidance of the scraper-excavator nozzle, even below the sleepers and rails, is performed by a special , hydraulically controlled manipulator. The excavated material and transport air is separated in the material separator. When the chamber is full, the work process is interrupted automatically and the chamber is emptied. The contents of the chamber drop onto the floor conveyor belt and then onto the transfer conveyor belt, from where the excavated material can be loaded either onto MFS units or into wagons in front of the machine or onto wagons or lorries alongside the machine. Due to the retractable design of the transfer conveyor belt, no match wagon is needed during transfer travel.
The air used for vacuum intake is passed through the filter chamber and cleaned of any fine particles, releasing only the clean air into the environment. The filters used in the filter chambers are cleaned automatically using compressed air. The fine particles are passed through a flap onto the floor conveyor belt and taken away together with a spoil.
Various suction nozzle attachments
Special circumstances, such as track conductors in the line, soiling at the sides that can only be removed with great effort, or an extremely small space between the rail head and the edge of the station platform, make it necessary to equip the suction nozzle with a variety of attachments. The different attachments allow the nozzle to be adapted very well to the prevailing circumstances and to the material being removed.
The all-round application of the VM 170 JUMBO wherever there are complicated working conditions enables material to be excavated over the entire cross-section of the ballast bed in plain track or switches, without having to dismantle the track beforehand.
Work can be performed on sections of a track network that have awkward access and unfavorable line conditions without major disruptions to services and without great deployment of labour and machines. A further advantage is also the low environmental impact of the machine thanks to extensive noise protection measures, dust-free outgoing air and minimization of the pollutant emissions.