Check Valve Structure for High-Pressure Sealing and Breakage Prevention
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Solution Overview
Problem
Check valves used for high-pressure fluids face challenges in maintaining sealability and preventing breakage and scattering of the valve element due to excessive fluid pressure.
Innovation Solution
A check valve design featuring a valve element made of a low-rigidity material, such as resin, which is supported by a locking surface on the flow path member, preventing further displacement and breakage when deformed by high fluid pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal-to-metal sealing structure is used with high-rigidity materials, then pressure resistance is improved, but manufacturing precision requirements increase and noise increases
Solution Approach 1:
The valve element is made of a composite structure combining a resin base material with a metal reinforcement skeleton. This composite structure provides both the pressure resistance of metal and the sealing capability of elastic materials, while reducing the manufacturing precision requirements compared to pure metal-to-metal sealing.
2Reliability
If a low-rigidity material valve element is used, then sealability is improved and noise is reduced, but reliability deteriorates due to breakage risk under high pressure
Solution Approach 1:
The valve element combines resin material with embedded metal skeleton reinforcement. The resin provides elasticity for sealing and noise reduction, while the metal skeleton prevents breakage under excessive pressure, thus improving both sealability and reliability simultaneously.
Solution Approach 2:
The valve element has different rigidity characteristics in different regions: the main body is made of low-rigidity resin for sealing contact, while strategic reinforcement areas incorporate high-rigidity metal skeleton to prevent breakage. This local differentiation of material properties resolves the contradiction between sealability and strength.
3Reliability
If a seal ring of elastic material is used, then sealability is improved with small pressing force, but reliability deteriorates under high pressure due to detachment or breakage
Solution Approach 1:
Instead of using a separate elastic seal ring that can detach or break under high pressure, the invention integrates the sealing function directly into the valve element body through the resin material, reinforced by an embedded metal skeleton that prevents breakage and detachment while maintaining sealing 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
The design achieves high sealability and prevents breakage and scattering of the valve element, even under high fluid pressure, while reducing noise compared to high-rigidity metal valve elements.
Implementation Method 1
The valve element is formed of a material with lower rigidity than at least portions of the flow path member where the valve seat surface and the locking surface are formed, so that when the valve element is displaced, by receiving a force toward an upstream side, from the closed position to a position further upstream of the closed position while deforming a portion of the valve element that is engaged with the valve seat surface
Data Source
AI summary
The check valve includes a flow path member having an inner peripheral surface defining a fluid passage, and a valve element disposed in the fluid passage so as to be displaceable between a closed position where the valve element closes the fluid passage and an open position where the valve element opens the fluid passage. The valve element is formed of a material with lower rigidity than at least portions of the flow path member where a valve seat surface and a locking surface are formed. When the valve element is displaced, by receiving a force toward an upstream side, from the closed position to a position further upstream of the closed position while deforming an abutting portion of the valve element that is engaged with the valve seat surface, the valve element that has deformed is engaged with and supported by the locking surface.