Non-Return Valve Cassette for Higher Residual Pressure
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Solution Overview
Problem
Existing one-way valve devices with non-return valve mechanisms struggle to retain residual pressure without increasing the device size, as they rely on spring force to maintain valve closure, limiting their ability to manage fluid flow efficiently.
Innovation Solution
A non-return valve mechanism with a regulator valve that moves between open and closed positions, utilizing a biasing member with a spring force to control fluid flow, where the valve-closing directional end has a smaller projected area than the valve-opening directional end, allowing the valve to open against the spring force when upstream pressure is sufficient, and close when pressure decreases, thus maintaining residual pressure without upsizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a larger spring with larger spring force is used to increase the predetermined pressure of the fluid remaining in the container, then the residual pressure retention is improved, but the non-return valve mechanism and container valve become larger
Solution Approach 1:
The regulator valve employs asymmetric area design where the valve-closing directional end has a smaller projected area than the valve-opening directional end. This asymmetry creates a pressure differential that generates a force component assisting the spring force, enabling higher residual pressure retention without requiring a larger spring or valve mechanism
Solution Approach 2:
The invention changes the geometric parameters of the regulator valve by creating different projected areas at the valve-closing and valve-opening ends. This parameter modification alters the pressure-force relationship, allowing the valve to achieve closure at higher pressures without increasing the overall mechanism size
2Stress or pressure
If the spring force is increased to maintain valve closure at higher pressures, then the pressure regulation capability is improved, but the device complexity increases
Solution Approach 1:
The asymmetric area design of the regulator valve integrates pressure differential utilization directly into the valve structure, avoiding the need for additional complex mechanisms. The structural asymmetry itself becomes the pressure-regulating element, simplifying the overall device while improving pressure regulation 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 design effectively retains residual pressure at a predetermined level without increasing the device size, ensuring a sufficient flow rate under varying upstream pressures, and includes a safety valve mechanism to manage overpressures, preventing damage and maintaining flow efficiency.
Implementation Method 1
a biasing member with a spring force to bias the regulator valve in a valve-closing direction from the valve-open position to the valve-closed position, and to permit the regulator valve to move in a valve-opening direction from the valve-closed position to the valve-open position against the biasing in the valve-closing direction when the fluid flowing upstream has a predetermined pressure or greater
Implementation Method 2
The regulator valve includes, in an area of the regulator valve at the valve-closed position communicating with an upstream space, a valve-closing directional end for receiving a pressure in the valve-closing direction and having a smaller projected area in an opening and closing direction than a valve-opening directional end for receiving a pressure in the valve-opening direction
Data Source
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AI summary
A one-way valve device or a non-return valve mechanism in the valve device provides a higher retaining residual pressure without upsizing. A non-return valve cassette in a consumption valve device regulates gas flow. The cassette includes a check valve movable forward and backward between a valve-closed position and a valve-open position in an outlet secondary flow channel and movable backward to the valve-open position under pressure of the gas flowing upstream, and a first coil spring with a spring force biasing the check valve upstream. The first coil spring permits the check valve to move downstream against the upstream biasing when an upstream pressure is a predetermined pressure or greater. The check valve includes a downstream end smaller than an upstream end in an area communicating with an upstream space at the valve-closed position.