Diaphragm Valve Spring Compensation for Seal Relaxation
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Solution Overview
Problem
Existing diaphragm valves experience seal reliability issues due to membrane relaxation and settling, leading to incomplete seals and potential damage from excessive pressure, necessitating frequent maintenance and reducing service life.
Innovation Solution
A diaphragm valve design featuring a spring device that presses the diaphragm against the lower part with a controlled pressure of 3 N/mm² to 50 N/mm², utilizing a spring element and contour element with rounded shapes to ensure a reliable seal without damaging the diaphragm, eliminating the need for additional sealing lips and allowing for self-adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the diaphragm is clamped directly between the upper and lower parts without additional sealing measures, then the device complexity is reduced and manufacturing is simplified, but the sealing reliability deteriorates due to membrane relaxation and settling over time
Solution Approach 1:
The spring device is pre-loaded to apply continuous compressive force on the diaphragm, anticipating the relaxation and settling that occurs over time. This preliminary action ensures the diaphragm remains under sufficient compression to maintain sealing reliability throughout its service life, compensating for the natural relaxation process.
Solution Approach 2:
The invention changes the pressure parameter by introducing a spring device that maintains optimal compression force on the diaphragm. The spring compensates for pressure loss due to relaxation, dynamically adjusting to maintain the required sealing pressure without requiring additional sealing lips or complex sealing arrangements.
2Reliability
If additional sealing lips are added to improve sealing reliability, then the sealing performance is enhanced, but the device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The invention extracts and eliminates the need for additional sealing lips by using a spring device to apply sufficient compression force directly on the diaphragm. This removes the complexity of multiple sealing components while maintaining reliable sealing through proper force application to the existing diaphragm structure.
3Reliability
If high compression force is applied to ensure sealing, then the sealing reliability is improved, but the diaphragm may be damaged due to excessive pressure
Solution Approach 1:
The spring device provides dynamic compression force that adapts to the diaphragm's condition. As the diaphragm relaxes and settles over time, the spring maintains appropriate compression without requiring excessive initial force. This dynamic adjustment ensures reliable sealing while preventing damage from overly high compression forces.
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 design provides a permanent seal, enhances operational reliability, reduces maintenance needs, and extends the service life of the diaphragm valve by preventing damage and maintaining a consistent seal.
Implementation Method 1
The spring device pressing the diaphragm directly against the lower part with a pressure of more than 3 N/mm2
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Diaphragm valve with a diaphragm (5) that seals between chambers, wherein the diaphragm (5) is arranged between an upper part (7) and a lower part (1). The diaphragm valve has a clamping arrangement (14) in which the diaphragm (5) is held directly between the upper part (7) and the lower part (1). The diaphragm valve has a sealing arrangement in which the upper part (7) acts directly on a spring device (15), wherein the spring device (15) presses the diaphragm (5) directly against the lower part (1) with a pressure of more than 3 N/mm².