SPRAYING DEVICE FOR A CONSTRUCTION MACHINE FOR PROCESSING THE GROUND, A CONSTRUCTION MACHINE WITH A SPRAYING DEVICE AND A METHOD FOR OPERATING A SPRAYING DEVICE

• US 20120043401A1
• Filed: 08/15/2011
• Published: 02/23/2012
• Est. Priority Date: 08/23/2010
• Status: Abandoned Application

• Current Assignee: Bomag GmbH (FAYAT SAS)
• Original Assignee: Bomag GmbH (FAYAT SAS)
• Inventors: Heusinger, Juergen, Nacke, Andreas, Forster, Johannes
• Application Number:
  US13/209,532
• Publication Number:
  US 20120043401A1
• Time in Patent Office: Days
• US Class Current: 239/722
• CPC Class Codes: B05B 13/005 mounted on vehicles or designed to apply a liquid on a very large surface, e.g. on the road, on the surface of large containers
• CPC Class Codes: E01C 19/17 Application by spraying or throwing
• CPC Class Codes: E01C 19/178 Elements or attachments for spreading-out or smoothing-down the applied material, e.g. brushes
• 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
• CPC Class Codes: E01C 23/088 Rotary tools, e.g. milling drums for forming recesses to receive marking materials E01C23/0946

Abstract

A spraying device for introducing a fluid into the working chamber of a construction machine for processing the ground or road surfaces, comprises two fluid delivery apparatuses, a line system and a control unit. The present invention further relates to a construction machine, especially a recycler, a stabilizer or a cold milling machine, comprising such a spraying device and a method for operating such a spraying device.

Claims

1. A spraying device for introducing a fluid into a working chamber of a construction machine for processing the ground or road surfaces, comprising:

at least one first and at least one second fluid delivery device via which the fluid can be introduced into the working chamber, with the first fluid delivery device being arranged for delivering a larger fluid quantity than the second fluid delivery device at a fixed operating pressure;

a line system via which the fluid is guided to the first and at least second fluid delivery apparatus; and

a control unit for controlling the fluid delivery via the at least first and the at least second fluid delivery device.

2. A spraying device according to claim 1, wherein the at least first and the at least second fluid delivery device comprises at least two dosing elements.

3. A spraying device according to claim 2, wherein the dosing elements of the at least first and the at least second fluid delivery device are arranged in a manner that, at a fixed operating pressure, the flow rate of the fluid through the dosing element of the first fluid delivery device is in the range of 1.8:

1 to 5;

1 at a ratio to the flow rate of the fluid through a dosing element of the second fluid delivery device.

4. A spraying device according to claim 2, wherein the control unit is arranged in a manner that it individually triggers the at least two dosing elements of the at least first fluid delivery device and/or the at least second fluid delivery device.

5. A spraying device according to claim 2, wherein the control unit is arranged in a manner that it triggers the dosing elements of the at least first fluid delivery device and/or the at least second fluid delivery device in a grouped manner.

6. A spraying device according to claim 1, wherein the control unit is arranged in a manner that it switches over from the at least first fluid delivery device to the at least second fluid delivery device depending on exceeding or falling below a threshold value (Sw).

7. A spraying device according to claim 1, wherein upon exceeding or falling below a maximum value (Mw), the control unit will activate at least one of the at least two fluid delivery devices of the at least other fluid delivery device, or will deactivate at least one of the at least two fluid delivery devices.

8. A spraying device according to claim 7, wherein the threshold value (Sw) and/or the maximum value (Mw) is a line pressure, a milling depth, a travelling speed and/or a flow rate.

9. A spraying device according to claim 7, wherein the control unit is arranged in the manner that the threshold value (Sw) and/or the maximum value (Mw) vary depending on the fluid.

10. A spraying device according to claim 1, wherein a cleaning device is provided for cleaning the at least first and at least second fluid delivery apparatus.

11. A spraying device according to claim 1, wherein the line system comprises a fluid filter.

12. A construction machine for processing the ground, comprising a spraying device according to claim 1.

13. A method for operating a spraying device of a construction machine according to claim 12, wherein the flow rate of the spraying device is controlled by triggering at least one first fluid delivery device and at least one second fluid delivery device by a control unit, with the first fluid delivery device being arranged in a manner that, at fixed operating pressure, the first fluid delivery device is arranged to supply a larger fluid quantity than the second fluid delivery device.

14. A method for operating a spraying device according to claim 13, wherein the control occurs depending on exceeding or falling beneath at least one fixed threshold value (Sw) of a specific operating parameter.

15. A method for operating a spraying device according to claim 13, wherein the control occurs depending on the travelling speed of the construction machine according to claim 12, depending on the line pressure and/or depending on the flow rate.

16. A method for operating a spraying device according to claim 13, wherein a changeover between the at least first and the at least second fluid delivery device occurs in an overlapping manner.

17. A spraying device according to claim 2, wherein the at least two closing elements comprise outlet nozzles.

18. A spraying device according to claim 3, wherein at the fixed operating pressure, the flow rate of the fluid through the dosing element of the first fluid delivery device is in the range of 2:

1 to 3;

1 at a ratio to the flow rate of the fluid through a dosing element of the second fluid delivery device.

19. A spraying device according to claim 10, wherein the cleaning device comprises a nozzle cleaning device.

20. A spraying device according to claim 11, wherein the fluid filter is located before or after a fluid pump.

21. A construction machine according to claim 12, wherein the construction machine comprises one of a recycler, a stabilizer or cold milling machine.