Hydraulic valve assembly

Patent metadata

Field	Value
Publication number	US-12129873-B2
Application number	US-202318358473-A
Country	US
Kind code	B2
Filing date	Jul 25, 2023
Priority date	Jul 28, 2022
Publication date	Oct 29, 2024
Grant date	Oct 29, 2024

Abstract

A hydraulic valve assembly includes a connection section, a first valve section and a pressure line. The first valve section has a first spool piston, a first spool diverter, at least one first consumer port and at least one second consumer port. The first spool diverter can be switched at least into a first spool diverter switching position and a second spool diverter switching position. A shut-off valve is disposed in the pressure line and blocks the pressure line in a blocking position and can be switched from the blocking position into a first release switching position and a second release switching position. The shut-off valve switches into the first release switching position when the first spool diverter is in the first spool diverter switching position and into the second release switching position when the first spool diverter is in the second spool diverter switching position.

First claim

The invention claimed is:

1. A hydraulic valve assembly, comprising:
a connection section;
a first valve section; and
a pressure line,
wherein the first valve section can be pressurized by the connection section via the pressure line,
wherein the first valve section comprises a first spool piston, a first spool diverter, at least one first consumer port of the first valve section, and at least one second consumer port of the first valve section,
wherein a first group of hydraulic consumers can be controlled via the at least one first consumer port of the first valve section,
wherein a second group of hydraulic consumers can be controlled via the at least one second consumer port of the first valve section, wherein the first spool diverter can be switched at least into a first spool diverter switching position and a second spool diverter switching position,
so that the first group of hydraulic consumers can be controlled via the first spool piston when the first spool diverter is in the first spool diverter switching position, and
so that the second group of hydraulic consumers can be controlled via the first spool when the first spool diverter is in the second spool diverter switching position, and
wherein a shut-off valve is disposed in the pressure line, and the shut-off valve blocks the pressure line in a blocking position,
wherein the shut-off valve can be switched from the blocking position into a first release switching position and a second release switching position, the pressure line being released in the first release switching position and in the second release switching position,
wherein the shut-off valve switches to the first release switching position when the first spool diverter is in the first spool diverter switching position allowing a pilot pressure to be applied to the shut-off valve, and
wherein the shut-off valve switches to the second release switching position when the first spool diverter is in the second spool diverter switching position allowing a pilot pressure to be applied to the shut-off valve.

2. The hydraulic valve assembly according to claim 1 , wherein the shut-off valve is biased to the blocking position.

3. The hydraulic valve assembly according to claim 1 , wherein the first valve section comprises a first reset device, wherein the first reset device biases the first spool diverter into the second spool diverter switching position.

4. The hydraulic valve assembly according to claim 1 , wherein the shut-off valve is disposed between the connection section and the first spool piston in the pressure line.

5. The hydraulic valve assembly according to claim 4 , wherein the hydraulic valve assembly comprises an intermediate section disposed between the connection section and the first valve section, wherein the shut-off valve is disposed in the intermediate section.

6. The hydraulic valve assembly according to claim 1 , wherein the hydraulic valve assembly comprises at least one second valve section which can be pressurized by the connection section via the pressure line, the second valve section having a second spool piston, a second spool diverter, at least one first consumer port of the second valve section and at least one second consumer port of the second valve section, the first group of hydraulic consumers can be controlled via the at least one first consumer port of the second valve section, the second group of hydraulic consumers can be controlled via the at least one second consumer port of the second valve section, the second spool diverter can be switched into a first spool diverter switching position and a second spool diverter switching position, so that the first group of hydraulic consumers can be controlled via the second spool piston when the second spool diverter is in the first spool diverter switching position, and
so that the second group of hydraulic consumers can be controlled via the second spool piston when the second spool diverter is in the second spool diverter switching position,
wherein the first spool diverter and the second spool diverter switch together and in parallel into the respective first spool diverter switching position or into the respective second spool diverter switching position,
wherein the second valve section comprises a second reset device, wherein the second reset device biases the second spool diverter into the second spool diverter switching position.

7. The hydraulic valve assembly according to claim 1 , wherein the first valve section comprises at least one third consumer port of the first valve section, a third group of hydraulic consumers can be controlled via the at least one third consumer port of the first valve section, the first spool diverter can be switched into a third spool diverter switching position, so that the third group of hydraulic consumers can be controlled via the first spool piston when the first spool diverter is in the third spool diverter switching position.

8. The hydraulic valve assembly according to claim 7 , wherein the second valve section has at least one third consumer port of the second valve section, the third group of hydraulic consumers can be controlled via the at least one third consumer port of the second valve section, the second spool diverter can be switched into a third spool diverter switching position, so that the third group of hydraulic consumers can be controlled via the second spool piston when the second spool diverter is in the third spool diverter switching position,
wherein the first spool diverter can be switched together and in parallel with the second spool diverter into the respective third spool diverter switching position.

9. The hydraulic valve assembly according to claim 8 , wherein the shut-off valve switches to the first release switching position when the first spool diverter and the second spool diverter are in the third spool diverter switching position.

10. The hydraulic valve assembly according to claim 1 , wherein the hydraulic valve assembly comprises a hydraulic pilot control device, the hydraulic pilot control device being configured to apply a pilot pressure the first spool diverter and/or the second spool diverter for common and parallel switching into the first spool diverter switching position and/or the third spool diverter switching position, and
wherein pilot pressure can be applied to the shut-off valve via the hydraulic pilot control device for switching from the blocking position into the first release switching position or into the second release switching position.

11. The hydraulic valve assembly according to claim 10 , wherein the hydraulic pilot control device has at least one first shut-off valve pilot line for switching the shut-off valve from the blocking position to the first release switching position, wherein a pilot pressure is only applied to the at least one first shut-off valve pilot line when the first spool diverter and the second spool diverter are each in the first spool diverter switching position or when the first spool diverter and the second spool diverter are each in the third spool diverter switching position.

12. The hydraulic valve assembly according to claim 11 , wherein the hydraulic pilot device comprises a pilot valve device, a pilot line, a return line, a first pilot branch, and a second pilot branch,
wherein a pilot pressure in the first pilot branch switches the first spool diverter and the second spool diverter together into the respective first spool diverter switching position,
wherein a pilot pressure in the second pilot branch switches the first spool diverter and the second spool diverter together into the respective third spool diverter switching position,

Assignees

• Hawe Hydraulik Se

Inventors

• Wechsel Thomas
• Sabatier Jean-Michel

Classifications

• F15B2211/30595

  with additional valves between the groups of valves for multiple output members · CPC title

• F15B2211/30585

  having a single valve for multiple output members · CPC title

• F15B11/003

  Systems with load-holding valves · CPC title

• F15B2211/30515

  Load holding valves · CPC title

• F15B2211/3058

  having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode · CPC title