Hydrostatic Flow Control Valve With Adjustable Opening Pressure
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Solution Overview
Problem
Existing flow regulating valves are overly complex, require lubrication that can contaminate fluids, have non-adjustable threshold water pressures, and lack fine adjustment capabilities, making them inefficient and inconvenient for various applications.
Innovation Solution
A hydrostatically adjustable flow control valve with a variable orifice that allows for infinite threshold pressure adjustments without disassembly, using fewer moving parts and hydrostatic resistance for compact design and automatic pressure adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flow regulating valve uses multiple interconnected moving parts to achieve flow control, then the valve can provide sealing and flow regulation functions, but the device complexity increases and lubrication is required which can contaminate the fluid
Solution Approach 1:
The patent removes the sealing function from the moving valve components and relocates it to the stationary valve seat. The valve members are designed without sealing surfaces, eliminating the need for lubrication and reducing complexity while maintaining sealing effectiveness through the stationary seat design.
Solution Approach 2:
The patent replaces traditional mechanical spring-based valve mechanisms with a diaphragm-driven system. The diaphragm responds directly to pressure differential and fluid level changes, eliminating the need for springs, adjustables, and other mechanical components that require lubrication.
2Reliability
If a flow regulating valve uses a spring mechanism to provide threshold pressure, then the valve can maintain a predetermined opening pressure, but the threshold pressure cannot be adjusted without disassembling the valve
Solution Approach 1:
The patent replaces the mechanical spring-based threshold pressure mechanism with a hydrostatic system. The diaphragm chamber creates a counterbalancing pressure that responds automatically to fluid level changes, providing threshold pressure control without mechanical adjustment components.
Solution Approach 2:
The valve system automatically adjusts its threshold pressure response based on the fluid level in the sump. As the fluid level changes, the hydrostatic pressure on the diaphragm automatically modifies the opening pressure requirement, eliminating the need for manual adjustment mechanisms.
3Ease of manufacture
If a flow regulating valve uses only two pre-set threshold pressures, then the manufacturing is simplified, but the adaptability to different applications is limited
Solution Approach 1:
The patent transforms the static, fixed threshold pressure system into a dynamic one. The diaphragm chamber allows the threshold pressure to vary continuously based on fluid level, enabling the valve to adapt to different operating conditions without requiring multiple pre-configured valve versions.
4Ease of operation
If a flow regulating valve uses lubrication to reduce friction between moving parts, then the valve operation is smoothed, but the lubrication can contaminate the drinking water
Solution Approach 1:
The patent removes all lubrication requirements by eliminating the need for sliding or rotating moving parts. The valve members are designed to move freely without contact with stationary components, and the sealing function is transferred to the stationary seat, eliminating the source of potential contamination.
Solution Approach 2:
The valve members are designed as simple, non-lubricated components that can be easily replaced if needed. The design accepts that the valve members may wear or become contaminated and can be discarded and replaced without affecting the main valve body or fluid pathway.
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 reduces complexity, eliminates contamination risks, provides precise and continuous pressure adjustments, and ensures efficient fluid flow management with enhanced compactness and adaptability.
Implementation Method 1
A pressure differential across the diaphragm moves the valve members from the closed position to the open position
Implementation Method 2
The automatic adjusting mechanism comprises a diaphragm mounted in a diaphragm chamber... An automatic hydrostatic adjusting mechanism is provided which responds to a change in the level of fluid in the sump
Data Source
AI summary
The present disclosure relates to a hydrostatically adjustable flow control valve. In one embodiment, the valve includes a fixed sleeve that slidably receives a spool. A spring biases the spool relative to the fixed sleeve. A primary orifice is used to deliver fluid to the interior area of the fixed sleeve and spool. A control device is used to selectively vary the rate at which fluid drains from the interior area. Draining the fluid results in the spool being received within the interior of the fixed sleeve. The movement of the spool opens flow ports within the sleeve. This, in turn, allows fluid to exit the valve. Conversely, the control device can be set to prevent fluid drainage. This results in the spool extending from interior of the fixed sleeve, the closure of the flow ports, and the sealing of the valve.