Serial Spring Gas Metering Valve for Reliable Sealing
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Solution Overview
Problem
Generic gas metering valves face challenges in reliably closing under high negative pressure and achieving precise gas metering, while being susceptible to temperature variations.
Innovation Solution
A gas metering valve with a spring loading device featuring at least two spring bodies connected mechanically in series, each with distinct elastic characteristics, allowing for adaptable spring characteristics along the closing path to ensure reliable sealing and precise metering, using materials like stainless steel for high temperature resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single spring body is used in the spring loading device, then the device complexity is reduced, but the adaptability to different closing path conditions deteriorates
Solution Approach 1:
The spring loading device is divided into multiple spring bodies (at least two) connected in series, each with different elastic characteristics. This segmentation allows each spring body to contribute differently to the overall spring characteristic along the closing path, enabling adaptation to varying closing conditions without requiring a completely different device structure.
Solution Approach 2:
The patent changes the elastic characteristics parameter of the spring loading device by combining multiple spring bodies with different elastic characteristics in series. This allows the overall spring characteristic to be adjusted and adapted to different closing path conditions while maintaining a consistent mechanical structure.
2Ease of manufacture
If conventional spring materials are used, then the ease of manufacture is improved, but the temperature resistance deteriorates
Solution Approach 1:
The patent specifies using stainless steel or high-grade steel materials for the spring bodies, which are composite or alloy materials designed to maintain elastic characteristics at high temperatures up to 300°C. These materials combine the necessary mechanical properties with temperature resistance, allowing the springs to function reliably in high-temperature environments while remaining manufacturable.
3Adaptability or versatility
If the spring characteristic is highly dependent on temperature, then the adaptability to temperature variations is improved, but the measurement precision of gas flow deteriorates
Solution Approach 1:
The patent selects spring materials and designs spring bodies with elastic characteristics that are minimally dependent on temperature variations. By carefully controlling the material properties and geometric parameters of the spring bodies, the overall spring characteristic remains stable across a wide temperature range, ensuring precise gas flow metering even when temperature changes occur.
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 enables precise and reliable gas metering across varied conditions, maintaining mechanical simplicity and minimizing temperature influence on the spring characteristics, ensuring effective sealing and precise control of gas flow.
Implementation Method 1
The spring bodies have elastic characteristics which are different from each other
Data Source
AI summary
A gas metering valve (1) having at least one valve seat (2) and at least one closure member (3) which can be pressed against the valve seat, the closure member in a maximum open position is raised at least in regions from the valve seat (2) and in a maximum closed position is pressed against the valve seat. The gas metering valve (1) has an adjusting device (5) which is spring-loaded by a spring loading device (4) of the gas metering valve (1) for adjusting the closure member (3) in a closing direction (6) from the maximum open position into the maximum closed position. The spring loading device (4) of the adjusting device (5), preferably when viewed in the closing direction (6), has at least two spring bodies (7a, 7b) which are connected mechanically in series, the spring bodies (7a, 7b) have elastic characteristics which are different from each other.