Pressure-Relieved On-Off Valve With Short-Stroke Magnet Actuator
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Solution Overview
Problem
Existing pressure-relieved switching valves require separate components for each nominal size, leading to high costs and limited flexibility in flow control, with short armature strokes and fixed throttle functions, making them complex and difficult to maintain across various diameters.
Innovation Solution
A pressure-relieved switching valve design with a space-separating seal and a short-stroke magnet actuator, allowing for variable valve cross-sections and flow rates using the same magnet size, featuring a valve piston with a vulcanized seal and damping device for noise reduction, and an integrated displacement sensor for proportional control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate valve components are designed for each nominal size, then the valve can be precisely adapted to specific seat sizes, but manufacturing costs increase enormously due to requiring separate tools for each part
Solution Approach 1:
The patent applies universality by designing a single standardized valve body that can serve multiple nominal sizes through interchangeable sealing elements. The valve body is constructed with a universal connection geometry that accommodates different sealing element diameters, allowing one valve body design to function across multiple valve sizes without requiring separate tooling for each size.
Solution Approach 2:
The patent segments the valve into modular components: a universal valve body and interchangeable sealing elements. The sealing element is designed as a separate, replaceable component with a standardized connection interface, allowing it to be swapped depending on the required nominal size while keeping the main valve body unchanged.
2Weight of stationary object
If the valve is designed with short armature stroke, then the magnetic coil size can be reduced, but the flow rate and cross-section are limited
Solution Approach 1:
The patent resolves the contradiction between short armature stroke and adequate flow rate by changing the dimensional approach: instead of increasing stroke length in one dimension, the valve increases the cross-sectional area of the opening. The opening cross-section is made sufficiently large to compensate for the shortened stroke, maintaining flow capacity while reducing magnetic coil size.
3Device complexity
If a fixed throttle function is used, then the valve structure is simplified, but flow rate regulation between different end positions cannot be achieved
Solution Approach 1:
The patent transforms the fixed throttle function into a dynamic, adjustable system. The valve opening cross-section can be varied by changing the lift position of the sealing element relative to the valve seat, enabling flow rate regulation between different end positions while maintaining a relatively simple overall valve structure.
4Measurement precision
If additional valves are used for flow rate regulation, then precise control can be achieved, but costs and energy consumption increase
Solution Approach 1:
The patent makes the single switching valve multi-functional by enabling it to perform both switching and proportional flow rate regulation functions. The valve can operate in different positions: fully closed, partially open with adjustable opening cross-section, and fully open, thereby replacing the need for additional specialized regulation valves.
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 cost-effective production of valves with adjustable flow rates and cross-sections, reduced noise, and simplified maintenance, while maintaining consistent actuating force across different sizes, achieving proportional control and efficient flow management.
Implementation Method 1
Electromagnetically actuated, pressure-relieved switching valves
Implementation Method 2
provide two opposing active surfaces of the same size which communicate via a connecting channel and are under the same pressure
Data Source
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AI summary
Disclosed is a pressure-relieved on-off valve (1) comprising a pneumatic valve (PV) section and an electric drive (EA) section. The pneumatic valve (PV) section is provided with a longitudinally movable valve piston (4) while the electric drive (EA) section is equipped with at least one magnet coil (10) that is stationary in the on-off valve (1) and a longitudinally movable armature (11) which cooperates with the longitudinally movable valve piston (4) of the pneumatic valve (PV) section without being permanently connected thereto.