Self-Regulating Control Valve With Downstream Pressure Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pressure control valves require external pilots to regulate fluid flow between high-pressure and low-pressure lines, lacking self-regulation capabilities.
Innovation Solution
A self-regulating control valve mechanism with a piston, spring, and fluid lines that automatically adjusts to maintain pressure within a low-pressure line by balancing supply and sample fluid pressures, using a spring force and fluid pressure to open or close the valve based on predefined thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an external pilot is used to control the pressure control valve, then the valve can be opened and closed, but the system complexity increases and self-regulation capability is lost
Solution Approach 1:
The pressure control valve is designed to automatically sense downstream pressure through the feedback line and adjust its opening accordingly. The spring mechanism provides the closing force while the downstream pressure provides the opening force, eliminating the need for external pilots or control systems. The valve self-regulates by balancing these two forces.
Solution Approach 2:
A feedback line connects the downstream side of the valve to the upstream side, allowing the valve to sense the actual downstream pressure and adjust its opening to maintain the desired pressure differential. This closed-loop feedback mechanism enables automatic pressure regulation without external control.
2Extent of automation
If a self-regulating mechanism is implemented, then external control is eliminated, but the valve mechanism complexity increases
Solution Approach 1:
The control function is extracted from the main valve body and implemented through a separate feedback line that taps into the downstream pressure. This allows the pressure sensing and control logic to be separated from the flow path, simplifying the overall system architecture while maintaining self-regulation.
Solution Approach 2:
The spring mechanism provides a counteracting force to the downstream pressure force on the piston. The spring is pre-compressed to provide a closing force that balances the opening force from downstream pressure, creating a self-equilibrating system that automatically maintains the desired pressure differential.
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
Effectively regulates fluid flow to prevent overpressure in low-pressure lines, protecting the system by automatically adjusting to maintain safe pressure levels without external control mechanisms.
Implementation Method 1
a spring acting to push the piston head in a close direction, the spring having a pressure force
Implementation Method 2
the supply pressure fluid acting on the piston head in an open direction for the valve mechanism and the sample fluid acting on the piston head in a close direction
Data Source
AI summary
A self-regulating control valve including a valve mechanism for controlling the flow of fluid from a high-pressure fluid supply to a low-pressure flow line, the low-pressure flow line having a max pressure for fluid flowing therethrough, a cylinder with a piston head therein and a spring acting to force the piston head in a close direction, the spring having a pressure force. The valve also includes a sample fluid line directing a sample fluid from the low-pressure flow line to a top side of the cylinder, the supply pressure fluid acting on the piston head in an open direction for the valve mechanism and the sample fluid acting on the piston head in a close direction for the valve mechanism. The max pressure for the fluid through the low-pressure flow line is approximately equal to the pressure of the supply pressure fluid and the pressure force of the spring. A method of including the steps of feeding a self-regulating control valve a supply pressure fluid at a desired pressure in a direction to open a valve mechanism and feeding the self-regulating control valve a sample fluid from the low-pressure flow line in a direction to close the valve mechanism. The method also includes the step of closing the valve mechanism of the self-regulating control valve when pressure of fluid in the low-pressure fluid line reaches a max pressure.