Pressure Control Seat Valve with Integrated Drain
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Solution Overview
Problem
Pressure control poppet valves in shut-off operation are prone to structural leakage and excessive pressure issues, requiring complex adjustments and additional components, which limits their effectiveness in control systems like clamping devices.
Innovation Solution
A pressure control seat valve design integrating a single control spring to actuate both the main and drain valves, with a compact screw-in cartridge structure, ensuring leak-free shut-off and maintaining pressure, using a poppet valve design for both main and drain functions, and optionally a separate relief valve for high pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a three-way pressure control valve is used to drain excess pressure medium, then control pressure increase is avoided, but structural leakage occurs making it unsuitable for shut-off operation
Solution Approach 1:
The patent combines the pressure control function and drain valve function into a single integrated poppet valve structure. The control piston controls both the main seat valve and drain valve through a unified mechanism, eliminating the need for separate three-way valves while maintaining shut-off reliability and preventing excessive pressure buildup.
Solution Approach 2:
The single control spring serves multiple functions: it provides the closing force for the main valve, controls the drain valve operation, and enables both pressure control and shut-off functions within one component. This multi-functionality resolves the contradiction by achieving both leak-free shut-off and excess pressure protection.
2Object-affected harmful factors
If a pressure control seat valve is combined with a parallel pressure-reducing seat valve, then excessive pressure is prevented, but adjustment complexity increases requiring adjustments to two control springs
Solution Approach 1:
The patent merges the pressure control and pressure reduction functions into a single integrated valve body with one control spring. The control piston translates spring force into coordinated control of both the main valve and drain valve, eliminating the need for two separate control springs and their associated adjustments.
Solution Approach 2:
The single control spring performs multiple functions: setting the control pressure, controlling the main valve closure, and actuating the drain valve. This universal control mechanism reduces adjustment complexity from two independent spring adjustments to a single unified adjustment process.
3Reliability
If a pressure control poppet valve is used for shut-off operation, then leak-free shut-off is achieved, but excessive pressure can still cause damage
Solution Approach 1:
The drain valve is integrated into the control piston and activates before excessive pressure can cause damage. When control pressure exceeds the set value, the control piston automatically opens the drain valve to release excess pressure medium, preventing damage before it occurs.
Solution Approach 2:
The control piston provides continuous feedback on control pressure conditions. When pressure rises above the control spring setting, the piston moves to open the drain valve, creating a feedback mechanism that automatically corrects excessive pressure while maintaining shut-off reliability.
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
The solution provides a reliable, space-saving, and energy-efficient pressure control mechanism that prevents excessive pressure buildup, allowing for precise control and reliable signal feedback, enhancing the functionality of pressure control systems in machine tools and clamping devices.
Implementation Method 1
a control spring (9) acting on the control piston (7)
Implementation Method 2
Pressure control seat valve with a control piston (7) which is slidable in a control pressure connection (14) and acts on a main closing element (3)
Data Source
Figure 1~3
Figure 2
Figure 4
AI summary
In a pressure regulating seat valve (V), with a main valve (5) arranged between a supply pressure port (2) and a control pressure port (14), to which a main closing element (3) is assigned upstream, which can be mechanically actuated by a control piston (7) acted upon by the control pressure (A) against a control spring (9), a drain valve (13) in seat valve design is arranged in a flow path (18) between the control pressure port (14) and a drain port (16), which can be mechanically actuated to the drain port (16) when the control pressure (A) set by the control spring (9) is exceeded until the control pressure (A) is restored, and the response behavior of the drain valve (13) and the main closing element (3) are jointly adjustable by means of the control spring (9).