Proportional Valve Piston Segmentation for Inverse Pilot Control
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Solution Overview
Problem
Existing proportional pressure control valves lack versatility in their applications, particularly in systems requiring inverse pilot control and pressure regulation, limiting their use in complex pressure control systems.
Innovation Solution
A valve device with a measuring connection integrated into the valve piston, allowing for permanent separation from the secondary connection, enabling inverse pressure regulation and pilot control, which can supply low pilot pressure and adjust system pressure based on magnet current, while also allowing conventional pilot control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the measuring connection is permanently connected to the secondary connection in conventional proportional pressure control valves, then the valve can supply high pilot pressure to the system, but the valve lacks versatility in inverse pilot control applications and complex pressure control systems
Solution Approach 1:
The valve device segments the fluid connections by permanently separating the measuring connection from the secondary connection. The measuring connection is integrated into the valve piston and permanently connected to the primary connection, while the secondary connection can be selectively connected or disconnected. This segmentation enables the valve to be used in both conventional and inverse pilot control applications, significantly increasing versatility without complicating the overall device structure.
Solution Approach 2:
The valve device achieves multi-functionality by enabling both conventional and inverse pilot control modes through the selective connection of the secondary connection. When the secondary connection is connected, the valve operates in conventional mode supplying high pilot pressure. When disconnected, it operates in inverse mode supplying low pilot pressure. This universal design allows a single valve to replace multiple specialized valves in different applications.
2Adaptability or versatility
If the valve supplies high pilot pressure to the system, then the system operates with high pilot pressure, but the valve cannot supply low pilot pressure for inverse pilot control
Solution Approach 1:
The valve device implements dynamic pressure supply capability by allowing the secondary connection to be selectively connected or disconnected. In conventional mode, the secondary connection is connected to receive high pilot pressure from the primary connection through the valve piston. In inverse mode, the secondary connection is disconnected, and the valve supplies low pilot pressure through the measuring connection. This dynamic configuration change enables flexible pressure regulation adapted to different operational requirements.
3Adaptability or versatility
If the measuring connection is integrated into the valve piston and permanently separated from the secondary connection, then inverse pressure regulation and pilot control are enabled, but the fluid connection configuration becomes more complex
Solution Approach 1:
The invention merges the measuring connection with the valve piston structure, integrating the pressure sensing function directly into the moving component. This integration eliminates the need for separate measuring connection passages and reduces the number of components. The measuring connection is formed by a passage through the valve piston that is permanently connected to the primary connection, simplifying the overall fluid connection configuration while enabling inverse pilot control 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
Enables simple system pressure control, supports inverse fluid routing, and allows for mechanically adjustable pressure settings, enhancing the valve's applicability in various pressure control systems, including those with actuating cylinders and regulators.
Implementation Method 1
a magnet system (28), in particular in the form of a proportional magnet system, for the longitudinal displacement of the valve piston (18)
Implementation Method 2
whereby a connection from the secondary connection (A) to the return connection (T) is established when the pressure falls below a setpoint value and a fluid-carrying connection from the primary connection (P) to the secondary connection (A) is established by means of the valve piston (18) if the pressure exceeds the setpoint value
Data Source
Figure 1
Figure 2
AI summary
1. Valve device and pressure control system with such a valve device. 2. A valve device, in particular in the form of a proportional pressure control valve, with a valve piston (18) which is longitudinally movable in a valve housing (10) which has at least three fluid connection points in the form of a primary (P), a secondary (A) and a return (T) port and with a measuring port in the valve piston (18) which is used for pressure control and is permanently connected to both the primary port (P) and a control chamber (20) on a side of the valve piston (18) opposite the primary port (P), is characterized in that when a setpoint pressure is undershot, a connection from the secondary port (A) to the return port (T) is established and when the setpoint pressure is exceeded, a fluid-carrying connection from the primary port (P) to the secondary port (A) is established by means of the valve piston (18).