Flow Control Valve Guide Assembly for Stable Meter Pressure
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Solution Overview
Problem
Existing flow control valves in water supply systems are inefficient in preventing the inclusion of air and water vapor, leading to inaccurate water meter readings and increased utility bills, and may suffer from radial movement issues that cause mechanical failure.
Innovation Solution
A flow control valve design featuring a spring-biased valve head that remains closed until a predetermined pressure is reached, with a guide assembly to constrain radial movement and a removable wear cap, ensuring accurate water flow and reducing the risk of mechanical failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a spring-biased valve head is used to prevent air and water vapor passage, then measurement precision of water meter is improved, but device complexity increases due to additional components
Solution Approach 1:
The guide assembly is integrated with the valve head structure, where the guide rails are positioned to engage with the valve head body, combining the guiding function with the valve head's sealing function. This reduces the need for separate guiding components and simplifies the overall assembly.
Solution Approach 2:
The valve head serves multiple functions: it provides the sealing surface against the valve seat, acts as a movable closure element, and incorporates engagement features that work with the guide assembly. The spring also serves dual purposes by biasing the valve head closed and providing the force necessary for the valve to overcome pressure differential when opening.
2Reliability
If a guide assembly is added to constrain radial movement of the valve head, then reliability of the valve is improved, but device complexity increases
Solution Approach 1:
The guide assembly is divided into separate guide rails that are positioned around the valve head, with each rail providing guidance in specific directions. This segmented approach allows the guiding function to be distributed across multiple simple components rather than requiring a single complex guiding mechanism.
Solution Approach 2:
The guide rails act as intermediary elements between the valve head and the housing, providing a mechanical interface that constrains radial movement without requiring direct engagement between the valve head and housing walls. This intermediary structure protects the valve head from lateral forces while maintaining smooth operation.
3Productivity
If the valve head is biased closed by spring force, then productivity of water flow control is improved, but loss of energy occurs due to spring compression
Solution Approach 1:
The valve operates in periodic cycles, remaining closed during normal operation and opening only when the pressure differential overcomes the spring force. This periodic action allows the spring to store energy during the closed phase and release it during the opening phase, rather than continuously opposing water flow.
Solution Approach 2:
The spring force parameter is designed to be sufficient to keep the valve closed under normal operating pressures, but not so high as to prevent opening when required. The spring constant and pre-compression are optimized to match the expected pressure differential, minimizing energy storage while maintaining effective flow control.
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 effectively compresses entrained air and vapor, improving the accuracy of water meter readings, reducing utility costs, and minimizing the risk of mechanical failure by constraining radial movement and using a durable wear cap.
Implementation Method 1
a spring retained within the housing, the spring biasing the valve head to the closed position and configured to maintain the valve head in the closed position until a predetermined pressure is applied to the valve head from fluid at the inlet
Implementation Method 2
the valve head engages the valve seat in the closed position to seal the flow passage
Implementation Method 3
a guide assembly extending along at least a section of the flow passage, the guide assembly configured to engage the valve head to constrain radial movement of the valve head
Implementation Method 4
a predetermined pressure is applied to the valve head from fluid at the inlet
Data Source
AI summary
Flow control valves may be positioned downstream of water meters to increase pressure and compress entrained water vapour passing through the meters. However, turbulence within such valves can cause the valve's head to move radially, bending a shaft within the valve which may break. Accordingly, there is provided a flow control valve comprising: a housing having a flow passage; a valve seat defined within the flow passage; a valve head moveable to a closed position to engage the valve seat and seal the flow passage; a shaft secured to the valve head; a support slidingly mounting the shaft within the housing; a spring biasing the valve head to the closed position and configured to maintain the valve head in the closed position until a predetermined pressure is applied; and a guide assembly extending along at least a portion of the flow passage to constrain radial movement of the valve head.