Method and device for foaming ballast beds
AssigneeHennecke GmbH
InventorsWolfgang Pawlik, Juergen Wirth, Andreas Petersohn
Life of this patent
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Abstract
The invention relates to a method and device for partially or completely foaming the hollow spaces in the ballast structure of a ballast bed, below which a subgrade (7) is located, having a reactive plastic, wherein the reactive components are mixed in a high-pressure mixer (1,26) and wherein the start time for the reactive mixture (4) is adjusted such that the foaming process substantially only begins when the reactive mixture has reached the subgrade (7).
Claims18
A method for partially or completely foaming the cavities in the ballast structure of a ballast bed, under which a subgrade is arranged, with a reactive plastic, in which method
- a) the reactive components are conveyed in a metered manner to at least one high pressure mixing head where they are mixed, and
- b) the liquid reactive mixture output from the high pressure mixing head is supplied in a freely flowing manner to the surface of the ballast structure,
- characterized in that
- c) the liquid reactive mixture is allowed to flow through the ballast bed as far as the subgrade, and
- d) the reactive mixture is subsequently allowed to foam and, as a result, rise by
- e) the starting time for the reactive mixture being set in such a manner that the foaming process essentially begins only when the reactive mixture has reached the subgrade.
(canceled)
10-14. (canceled)
A device for foaming the cavities in the ballast structure of a ballast bed, under which a subgrade is arranged, with a reactive plastic, the device comprising
- a) a rail vehicle, and
- b) at least one metering unit which is arranged on the rail vehicle, intended for metering a polyol-containing reactive component and is connected hydraulically via lines to the associated containers for the polyol component, and
- c) at least one metering unit which is arranged on the rail vehicle, is intended for metering an isocyanate component and is connected via lines to the associated containers for the isocyanate component, and
- d) at least one high pressure mixing head which is connected hydraulically via lines to the metering units for the polyol-containing reactive component and for the isocyanate component, and
- e) at least one metering unit for an activator or catalyst, which metering unit is connected hydraulically via lines to the metering unit or the associated container for one of the reactive components, or directly to the high pressure mixing head.
Dependencies are inferred from the claim text.