Guide-Pin Check Valve Layout for Stable Flow Regulation
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Solution Overview
Problem
Existing check valves lack stability, particularly in fluid flow applications, leading to potential backflow issues and inefficiencies in regulating fluid pressure and flow rates.
Innovation Solution
Incorporating a guide pin and guide sleeve arrangement within the check valve's inflow chamber to counteract fluid forces, combined with a bias element and stop mechanisms for precise shutter control, and utilizing a radially symmetric inlet and outlet configuration to ensure stable operation and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the guide pin is made longer to improve guiding stability, then the guiding accuracy and stability improve, but the distance between valve seat and outlets increases, making the check valve larger
Solution Approach 1:
The guide pin is arranged to extend in a direction that is not parallel to the flow direction, but rather at an angle, utilizing the radial dimension of the inflow chamber. This allows the guide pin to achieve sufficient guiding stability without increasing the axial length between valve seat and outlets, effectively solving the contradiction by changing the dimensional orientation of the guiding mechanism.
2Stability of the object's composition
If the guide pin extends beyond the valve seat towards the inlet, then the counter moment and stability improve, but the guide pin may interfere with inlet flow or require larger housing
Solution Approach 1:
The guide pin is positioned locally within the inflow chamber at a specific radial distance from the longitudinal axis, rather than extending centrally. This local positioning allows the guide pin to generate the necessary counter moment for stability while minimizing interference with the main inlet flow path and reducing the required housing volume.
3Stability of the object's composition
If multiple inlets are arranged radially symmetrically, then fluid forces are centered and stability improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of requiring multiple radially symmetric inlets, the invention achieves force balance stability through an asymmetric configuration where a single inlet is positioned at a specific angular location, and the guide pin is arranged at a corresponding radial distance from the longitudinal axis. This asymmetric arrangement creates the necessary counter moment without the manufacturing complexity of multiple symmetric inlets.
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 enhances the stability and compactness of the check valve, allowing for reliable fluid flow regulation with minimal variation in flow rates across a wide pressure range, effectively preventing backflow and ensuring consistent fluid flow.
Implementation Method 1
As a result of fluid pressure and dynamics, forces acting on the shutter exist in the proximity of the inlets. The guide pin and guide sleeve are placed relatively close to the inlets. Thus, the guide pin and sleeve are arranged relatively close to the point at which said forces act.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
The present application relates to a check valve (1) comprising a housing (2) with at least one inlet (3) and at least one outlet (4), the housing (2) defining an inflow chamber (5) connected to the at least one inlet (3) and an outflow chamber (6) connected to the at least one outlet (4), a valve seat (7) which defines a passage between the inflow chamber and the outflow chamber, and a shutter (8) which is displaceable with respect to the valve seat (7) between a closed position and an open position, the check valve (1) being provided with a guide pin (9) for guiding the shutter (8) between the open and closed positions, wherein the guide pin (9) at least partly extends in the inflow chamber (5) in a direction away from the shutter, the guide pin (9) being movably guided in a guide sleeve (10).