Hydraulic Valve Assembly for Consumer Group Identification
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Solution Overview
Problem
Existing hydraulic valve assemblies lack the ability to distinguish between different groups of hydraulic consumers, leading to potential faulty controls and instability in systems like vehicle-mounted concrete pumps, where the boom and supports must be controlled separately for safety.
Innovation Solution
A hydraulic valve assembly with a directional shut-off valve having three switching positions, allowing the pressure line to be released differently based on the spool diverter positions, enabling clear differentiation between groups of hydraulic consumers through a limit switch or displacement transducer, and incorporating reset devices to ensure correct operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shut-off valve is disposed in the pressure line to interrupt pressure supply, then safety is improved by preventing faulty control, but the ability to distinguish which group of hydraulic consumers is controlled is lost
Solution Approach 1:
The pressure line is segmented into multiple separate lines (first pressure line and second pressure line), each dedicated to a specific group of hydraulic consumers. The shut-off valve can selectively block one pressure line while allowing the other to remain active, thereby maintaining safety through pressure interruption while preserving identification of which consumer group is controlled through the remaining active line.
2Reliability
If the shut-off valve blocks the pressure line in a blocking position, then faulty control is prevented, but no distinction can be made between different groups of hydraulic consumers
Solution Approach 1:
The shut-off valve is designed with dynamic switching capability between a blocking position and a releasing position. When released, the system dynamically transitions from a single blocked state to a differentiated state where either the first or second pressure line remains active, enabling operational identification of the controlled consumer group while maintaining fault prevention capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures that only the intended group of hydraulic consumers is controlled, preventing faulty operations and maintaining system stability by providing a simple and reliable method to determine which group is being actuated.
Implementation Method 1
A hydraulic pilot control device has a first pilot branch and a second pilot branch, wherein the first pilot branch can be pressurized with pilot pressure... and wherein the second pilot branch can be pressurized with pilot pressure
Implementation Method 2
The first 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 first spool piston when the first spool diverter is in the first spool diverter switching position
Data Source
AI summary
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.