Lift Check Valve Deflection Surface Head Loss Reduction
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Solution Overview
Problem
Lift-type check valves with bent flow paths inside the body suffer from large head loss due to fluid slowing down when passing through the valve discs.
Innovation Solution
A lift-type check valve design with a flat inclined deflection surface that deflects fluid from the inflow direction to the passing direction, reducing head loss, and a sealing component made of closed-cell foam resin material for improved water-tightness and reduced friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flow path is bent inside the valve body, then the valve structure is compact, but the head loss increases due to fluid slowing down
Solution Approach 1:
The patent applies curvature by replacing the bent flow path with a smooth curved deflection surface. The fluid flow is guided along a curved trajectory from the inflow direction to the passing direction, eliminating sharp bends and reducing turbulence. This curved surface design maintains compact valve dimensions while minimizing head loss by ensuring smooth fluid transition.
2Reliability
If the valve disc oscillates linearly reciprocating, then the valve closes swiftly avoiding water hammer, but the head loss increases
Solution Approach 1:
The patent introduces a deflection surface as an intermediary element between the inflow direction and the valve disc. This curved surface gently redirects the fluid flow before it reaches the valve disc, reducing the impact velocity and minimizing head loss while preserving the swift closing action that prevents water hammer.
3Reliability
If a sealing component is added between valve seat and valve disc, then water-tightness is improved, but device complexity increases
Solution Approach 1:
The patent employs a flexible sealing component in the form of a thin sheet made of closed-cell foam resin material. This flexible membrane provides effective water-tight sealing between the valve seat and valve disc while adding minimal structural complexity. The thin film design allows easy integration into the existing valve structure.
Solution Approach 2:
The sealing component is made of closed-cell foam resin material, which provides effective sealing while being lightweight and easy to install. The porous foam structure maintains water-tightness while reducing the overall complexity and weight of the sealing system compared to solid rigid materials.
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 check valve allows fluid to flow with minimal head loss and is suitable for use in pumping systems as a foot valve, reducing pump pressure requirements and maintaining fluid integrity.
Implementation Method 1
a deflection surface 40 on which the fluid F is deflected from the inflow direction D1 to the passing direction D2
Implementation Method 2
a sealing component made of closed-cell foam resin material for improved water-tightness and reduced friction
Data Source
Figure 1
Figure 2
Figure 3A~3E
AI summary
A check valve (100) has a valve seat (20), and a valve disc (30) which closes the valve seat (20) in an openable/closable manner by linear reciprocating oscillation in the direction approaching or departing away from the valve seat (20), the check valve (100) being configured, as a lift-type check valve, to allow therein the inflow direction (D1) of a fluid (F) flowing into the valve seat (20) and the passing direction (D2) of the fluid (F) passing through the valve disc (30) to cross each other, the valve disc (30) being provided with, on the inflow side (primary side) thereof, a deflection surface (40) on which the fluid (F) is deflected from the inflow direction (D1) to the passing direction (D2).