Flow Direction Valve Mechanism for Residual Pressure and Low-Pressure Flow
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Solution Overview
Problem
Existing valve devices with flow direction restriction mechanisms suffer from low fluid flow rates when pressure is close to a predetermined level, which is insufficient for maintaining residual pressure in storage containers.
Innovation Solution
A compact flow direction restriction valve mechanism unit is introduced, featuring a first and second flow direction restriction valve, acting gas flow paths, safety flow paths, and urging portions to manage pressure and flow direction, ensuring a sufficient flow rate and preventing unintended fluid flow into storage containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flow direction restriction valve mechanism is used to maintain residual pressure in storage containers, then the pressure retention function is improved, but the fluid flow rate decreases when pressure is close to the predetermined level
Solution Approach 1:
The valve mechanism is divided into multiple functional segments: a flow direction restriction valve for pressure retention, a pressure decreasing valve for maintaining flow rate, and a safety valve for overpressure protection. Each segment operates independently at different pressure thresholds, allowing the system to maintain both pressure retention reliability and sufficient fluid flow rate simultaneously.
2Productivity
If a pressure decreasing mechanism is added to maintain sufficient flow rate at low pressure, then the fluid flow rate is improved, but the device complexity increases
Solution Approach 1:
Multiple valve functions (flow direction restriction, pressure decreasing, safety protection) are merged into a single integrated valve mechanism unit that can be attached to the storage container. This consolidation reduces the number of separate components and simplifies installation while maintaining all necessary functions.
Solution Approach 2:
The valve mechanism is designed as a multi-functional unit that simultaneously performs flow direction restriction, pressure decreasing, and safety valve functions. This universal design eliminates the need for multiple separate valves and reduces overall system complexity.
3Device complexity
If multiple valves are integrated into a compact unit, then the device complexity is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The valve mechanism is designed with pre-assembled modules and standardized connection interfaces that allow for precise manufacturing of individual components. The modular design enables quality control at each manufacturing stage, ensuring that when components are assembled, the required precision is maintained without requiring excessive precision in every single component.
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 mechanism ensures a sufficient flow rate even at low pressures, maintains residual pressure in containers, and safely releases excessive pressure, while maintaining container cleanliness and compactness.
Implementation Method 1
retracts toward the first valve open position by a pressure of the fluid flowing in the flow path
Implementation Method 2
retracts toward the second valve open position by a pressure of the fluid flowing in the flow path
Implementation Method 3
a first urging portion having a spring force that urges the first flow direction restriction valve in a valve opening direction from the first valve close position toward the first valve open position
Implementation Method 4
a second urging portion having a spring force that urges the second flow direction restriction valve in a valve closing direction from the second valve open position toward the second valve close position
Implementation Method 5
a third urging portion having a spring force that urges the safety valve in a valve closing direction from the third valve open position toward the third valve close position
Data Source
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AI summary
Provided is a compact valve device guaranteeing a sufficient flow rate even when the pressure is close to a predetermined level at which the pressure is to be retained, and a flow direction restriction valve mechanism unit attachable to such a valve device. The flow direction restriction valve mechanism unit includes a pressure decreasing valve assembly 200 that is located to be freely advance or retract in a combination valve cassette 100 attached to an in-outlet secondary side flow path 400 formed on the side of an outlet 40 with respect to an intermediate transmission member 54 in a flow path 60, and retracts by a pressure of gas; a first coil spring 210 urging the pressure decreasing valve assembly 200 in a retracting direction; a check valve 110 that is located to be freely advance or retract with respect to the pressure decreasing valve assembly 200, and retracts by a pressure of the gas; and a second coil spring 220 urging the check valve 110 in an advancing direction. A gas induction passage H is formed in which the gas flows and acts on the pressure decreasing valve assembly 200 such that the pressure decreasing valve assembly 200 moves in the advancing direction.