Membrane Valve Control Rod Adjustment for Variable Supply Pressure
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Solution Overview
Problem
Existing sanitary valves are sensitive to varying liquid supply pressures, leading to issues such as failure to open at low pressures, oscillation of the diaphragm, increased water consumption, and reduced adjustable flow rate ranges.
Innovation Solution
A valve design featuring a membrane valve with a control rod adjustable by a push button and rotary handle, allowing for variable adjustment of the minimum flow position to accommodate different supply pressures, ensuring reliable operation and optimal flow control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control rod is designed to keep the diaphragm open wide at minimum flow position, then the valve can operate reliably at low supply pressures, but the minimum flow rate increases and water consumption rises
Solution Approach 1:
The control rod is made adjustable between a first minimum flow position and a second minimum flow position, allowing the system to dynamically adapt to different supply pressure conditions. This dynamic adjustment capability enables optimization between reliability and water consumption based on actual operating conditions
Solution Approach 2:
The invention changes the positional parameter of the control rod by providing multiple adjustable minimum flow positions. This parameter change allows the valve to operate reliably at low supply pressures while minimizing water consumption by selecting the appropriate position
2Reliability
If the control rod is designed to keep the diaphragm open wide at minimum flow position, then the valve can operate reliably at low supply pressures, but the adjustable flow rate range is reduced
Solution Approach 1:
The adjustable control rod position enables the system to adapt dynamically to different supply pressure conditions, maintaining reliability while preserving maximum adjustable flow rate range by selecting the appropriate minimum flow position
Solution Approach 2:
The control rod serves multiple functions by being adjustable between different minimum flow positions, allowing it to accommodate both low supply pressure conditions and maintain a wide adjustable flow rate range across different operating scenarios
3Device complexity
If the control rod position is fixed, then the valve structure is simpler, but the valve cannot adapt to different supply pressures
Solution Approach 1:
The control rod is designed with adjustable positions that can be set according to different supply pressure conditions, providing adaptability while maintaining relatively simple valve structure
Solution Approach 2:
The invention changes the positional parameter of the control rod by providing multiple adjustable minimum flow positions, enabling adaptation to different supply pressures without significantly increasing structural complexity
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 valve is adaptable to varying supply pressures, preventing oscillation and minimizing water consumption while maximizing the adjustable flow rate range, ensuring consistent performance across different installation conditions.
Implementation Method 1
a diaphragm valve (5) with a diaphragm (6) and a backpressure chamber (7) connected to the at least one inlet (3)
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a valve (1) for a sanitary fitting, having: • a liquid guide (2) with at least one feed (3) and at least one discharge (4) for a liquid; • a membrane valve (5) with at least one membrane (6) and a counter pressure chamber (7) connected to the at least one feed (3); and • a control rod (8) for controlling the membrane valve (5), wherein the control rod (8) can be adjusted by a push button (9) between a closed position, in which the membrane valve (5) is closed, and an open position (10), in which the membrane valve (5) is at least partly opened, and in the open position (10), the control rod (8) can be adjusted by a rotary handle (11) between a minimum throughflow position (12), in which a minimum flow rate of the liquid flows through the at least one discharge (4), and a maximum throughflow position (13), in which a maximum flow rate of the liquid flows through the at least one discharge (4), said minimum throughflow position (12) of the control rod (8) being variably adjustable.