Fluidic Control Element Diaphragm Stability
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Solution Overview
Problem
Diaphragm valves face challenges in maintaining diaphragm mobility and stability under high pressure loads, leading to potential crack formation and irreversible deformation, which compromises their service life and sealing effectiveness.
Innovation Solution
A fluidic control element with a housing and actuating rocker element design that includes supporting areas and a form-fitting connection to prevent diaphragm overstretching and deformation, ensuring stability and optimal sealing even under pressure loads, featuring cylindrical extensions and free spaces to manage pressure and mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the diaphragm is made thinner to ensure high mobility, then the drive force required is reduced, but the diaphragm becomes more susceptible to crack formation and permanent deformation under pressure load
Solution Approach 1:
The patent applies local quality by providing selective support to the diaphragm in specific regions. The supporting areas are located adjacent to the attachment area on the actuating rocker element, creating localized structural reinforcement exactly where the diaphragm experiences highest stress during operation. This allows the diaphragm to remain thin overall for mobility while having reinforced zones for stability.
Solution Approach 2:
The supporting areas are pre-positioned on the actuating rocker element before the diaphragm is subjected to pressure loads. This preliminary structural arrangement ensures that when pressure is applied, the diaphragm already has predetermined support points to prevent excessive bulging and permanent deformation, resolving the contradiction between thinness for mobility and thickness for stability.
2Reliability
If the diaphragm is made thicker to ensure high stability and long service life, then crack formation is reduced, but the drive force required increases and mobility is reduced
Solution Approach 1:
Instead of uniformly thickening the entire diaphragm, the patent implements localized support structures on the actuating rocker element. This selective reinforcement provides the necessary stability and crack resistance only in the critical regions adjacent to the attachment area, while the rest of the diaphragm remains thin to maintain low drive force requirements and high mobility.
3Ease of operation
If the diaphragm is allowed free movement to maintain mobility, then the valve operates smoothly, but the diaphragm becomes overstretched and deforms permanently under pressure load
Solution Approach 1:
The patent applies local quality by providing selective support to the diaphragm in specific regions. The supporting areas are located adjacent to the attachment area on the actuating rocker element, creating localized structural reinforcement exactly where the diaphragm experiences highest stress during operation. This allows the diaphragm to remain thin overall for mobility while having reinforced zones for stability.
Solution Approach 2:
The supporting areas provide preliminary counter-action to the pressure forces before the diaphragm can become overstretched. By positioning support structures in advance at the vulnerable regions adjacent to the attachment area, the system prevents the harmful bulging and permanent deformation that would otherwise occur during pressure operation, while still allowing necessary diaphragm movement for valve operation.
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 stabilizes the diaphragm, preventing permanent deformation and leakage, while maintaining mobility and ensuring reliable operation under high pressures, thus enhancing the service life and sealing performance of diaphragm valves.
Implementation Method 1
The actuating rocker element (70) includes two lever arms (80). When an actuating force acts on the actuating rocker element (70), the latter is movable between an opening position and a closing position.
Implementation Method 2
The supporting areas restrict any free movement of the diaphragm. This prevents the diaphragm from being bulged and overstretched in an undesirable manner under a pressure load, which, upon pressure relief, will then result in wrinkling and leaking if the diaphragm no longer reversibly assumes its initial shape.
Data Source
AI summary
A fluidic control element has a housing that is assembled from first and second housing parts. A control space is formed between the housing parts into which two flow ducts open that are located in the first housing part. A sealing seat is arranged in the control space and is assigned to one of the flow ducts. A diaphragm is clamped between the housing parts. An actuating rocker element mounted for pivotal movement in the second housing part is configured with two lever arms, is movable between an opening position and a closing position, and is firmly attached to the diaphragm in an attachment area opposite the sealing seat. The actuating rocker element is provided with supporting areas for the diaphragm that are adjacent to the attachment area.