Method For The Treatment Of Layers, As Well As Construction Machine, In Particular Soil Stabilizer Or Recycler

• US 20140147206A1
• Filed: 11/15/2013
• Published: 05/29/2014
• Est. Priority Date: 11/27/2012
• Status: Active Grant

• Current Assignee: Wirtgen GmbH (Deere & Company)
• Original Assignee: Wirtgen GmbH (Deere & Company)
• Inventors: Menzenbach, Christoph, Barimani, Cyrus, Hhn, Gnter, Ridder, Marc
• Granted Patent: US 8,956,076 B2
• Time in Patent Office: Days
• US Class Current: 404/75
• CPC Class Codes: E01C 21/00 Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder recycling in place or on the road involving soil stabilisation E01C23/065 ; stabilising soil under existing surfacing E01C23/10; soil-conditioning or soil-stabilising materials C09K17/00; soil consolidation in general E02D3/12
• CPC Class Codes: E01C 23/065 Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving in situ mixing of hydraulic cement concrete E01C19/025; apparatus for in-plant recycling E01C19/1004, E01C19/1036

Abstract

In a method and a device for the treatment of a layer by introducing a binder and/or water and/or additives into a milled-up quantity of milled material of the layer to be stabilized by means of a construction machine or attachment machine with a milling/mixing rotor that is used to mill the layer at a specified milling depth, where the milling/mixing rotor is surrounded by a rotor housing which forms the boundary of the mixing chamber of the milling/mixing rotor, it is provided that during the positioning process, at least the binder quantity currently fed until reaching the specified milling depth is determined in accordance with the milled-up quantity of milled material currently present in the mixing chamber.

Claims

1. A method for the treatment of layers, comprising:

(a) positioning a milling/mixing rotor into the layers down to a specified milling depth, the milling/mixing rotor being surrounded by a rotor housing forming a boundary of a mixing chamber of the milling/mixing rotor; and

(b) during step (a), prior to the milling/mixing rotor reaching the specified milling depth, feeding into the mixing chamber a quantity of binder determined as a function of a milled up quantity of milled material currently present in the mixing chamber.

2. The method of claim 1, wherein:

the quantity of milled material currently present in the mixing chamber is determined as a function of at least a current milling depth of the milling/mixing rotor.

3. The method of claim 2, wherein:

the quantity of milled material currently present in the mixing chamber is determined as a function also of a radius of the milling/mixing rotor and a milling width or metering width of the milling/mixing rotor.

4. The method of claim 1, wherein:

the quantity of milled material currently present in the mixing chamber is determined as a function of at least a penetration speed of the milling mixing rotor into the layers.

5. The method of claim 1, further comprising:

after reaching the specified milling depth, feeding binder into the mixing chamber as a function of the specified milling depth, a current advance speed, and a milling width or metering width of the milling/mixing rotor.

6. The method of claim 1, wherein:

in step (b), the binder is fed into the mixing chamber as a weight percentage of the quantity of milled material currently present in the milling chamber.

7. The method of claim 1, wherein:

in step (b), the binder is intermittently fed into the mixing chamber.

8. The method of claim 1, wherein:

in step (b), the binder includes binder material and water.

9. The method of claim 1, wherein:

in step (b), the binder includes binder material and at least one additive.

10. The method of claim 1, wherein:

in step (b), the milled up quantity of milled material currently present in the mixing chamber excludes previously milled material previously mixed with binder which is currently present in the mixing chamber.

11. A construction machine, comprising:

a machine frame;

front ground engaging units and rear ground engaging units configured to support the machine frame from a ground surface;

a rotor housing connected to the machine frame between the front and rear ground engaging units, the rotor housing forming a boundary of a mixing chamber;

a rotor mounted to rotate within the rotor housing;

at least one metering device configured to meter at least one binder into the mixing chamber; and

a control unit operably connected to the at least one metering device and configured to control a quantity of the at least one binder metered into the mixing chamber per unit of time automatically in relation to a quantity of milled material milled up per unit of time, the control unit being also configured to control a quantity of the at least one binder currently metered into the mixing chamber prior to the rotor reaching a specified milling depth as a function of a milled-off quantity of milled material currently present in the mixing chamber.

12. The construction machine of claim 11, wherein:

the control unit is configured to determine the milled off quantity of milled material currently present in the mixing chamber prior to the rotor reaching the specified milling depth as a function of at least a current milling depth of the rotor.

13. The construction machine of claim 11, wherein:

the control unit is configured to determine the milled off quantity of milled material currently present in the mixing chamber prior to the rotor reaching the specified milling depth as a function of at least a penetration speed of the rotor into the ground surface.

14. The construction machine of claim 11, wherein:

the control unit is configured such that upon the rotor reaching the specified milling depth, the quantity of the at least one binder metered into the mixing chamber per unit of time is controlled as a function of the specified milling depth, a currently measured advance speed and a milling width or metering width of the rotor.

15. The construction machine of claim 11, wherein:

the control unit is configured such that the at least one binder is metered into the mixing chamber as a weight percentage of a corresponding quantity of milled material to be mixed with the at least one binder in the mixing chamber.

16. The construction machine of claim 11, wherein:

the control unit includes a data base having density values of different ground layers to be worked off and density values of the at least one binder saved in the data base.

17. The construction machine of claim 11, wherein:

the at least one metering device and the control unit are configured such that the at least one metering device can be operated intermittently.

18. The construction machine of claim 11, wherein:

the at least one binder includes binder material and water.

19. The construction machine of claim 11, wherein:

the at least one binder includes binder material and at least one additive.

20. A construction machine for the treatment of layers by milling up the layers and by introducing binder, the machine comprising:

a machine frame;

a rotor housing connected to the machine frame and forming a boundary of a mixing chamber;

a mixing rotor mounted to rotate inside the rotor housing;

at least one metering device configured to meter at least one binder material into the mixing chamber; and

a control unit operably associated with the at least one metering device, wherein;

the control unit is configured to control quantities of the at least one binder material, water and additive metered into the mixing chamber per unit of time automatically in relation to a quantity of milled material milled up per unit of time; and

the control unit is configured such that as the mixing rotor is being lowered into the layers and prior to the mixing rotor reaching a specified milling depth, the control unit controls a quantity of the at least one binder material, water and additive currently metered into the mixing chamber as a function of a quantity of milled material currently present in the mixing chamber.

21. The construction machine of claim 20, wherein:

the control unit is configured to determine the milled off quantity of milled material currently present in the mixing chamber prior to the mixing rotor reaching the specified milling depth as a function of at least a current milling depth of the mixing rotor.

22. The construction machine of claim 20, wherein:

the control unit is configured to determine the milled off quantity of milled material currently present in the mixing chamber prior to the mixing rotor reading the specified milling depth as a function of at least a penetration speed of the mixing rotor into the layers.

23. The construction machine of claim 20, wherein:

the control unit is configured such that upon the mixing rotor reaching the specified milling depth, the quantity of the at least one binder material, water and additive metered into the mixing chamber per unit of time is controlled as a function of the specified milling depth, a currently measured advance speed and a milling width or metering width of the mixing rotor.

24. The construction machine of claim 20, wherein:

the control unit is configured such that the at least one binder material, water and additive is metered into the mixing chamber as a weight percentage of a corresponding quantity of milled material to be mixed with the at least one binder material, water and additive in the mixing chamber.

25. The construction machine of claim 20, wherein:

the control unit includes a data base having density values of different ground layers to be worked off, and density values of the at least one binder material saved in the data base.

26. The construction machine of claim 20, wherein:

the at least one metering device and the control unit are configured such that the at least one metering device can be operated intermittently.

27. The construction machine of claim 20, wherein the construction machine is a soil stabilizer machine.

28. The construction machine of claim 20, wherein the construction machine is a recycler machine.

29. The construction machine of claim 20, wherein the construction machine is an attachment machine configured to be pulled behind a tractor.