Plug Diaphragm Assembly for Gap-Free Process Valve Sealing
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Solution Overview
Problem
Existing plug diaphragms for process valves face challenges in stability, assembly complexity, and maintenance due to multi-part constructions and the need for additional elastomer seals or spring-loaded devices, which complicates assembly and maintenance, and may not provide a gap-free connection for cleanability.
Innovation Solution
A plug diaphragm design featuring a first body with a distal section and a second body in a form-fitting manner, allowing for different materials and simplifying assembly, with a fastening contour for easy replacement parts and a sealing ring for improved tightness, and using materials like metal alloys and PTFE for reduced temperature expansion and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional elastomer seals or spring-loaded devices are used to seal interfaces of multi-part plug diaphragms, then sealing reliability is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The patent integrates the sealing function directly into the plug diaphragm body by creating a monolithic structure where the sealing interface is formed as an integral part of the diaphragm. This eliminates the need for separate elastomer seals or spring-loaded devices, thereby maintaining sealing reliability while significantly reducing device complexity and assembly difficulty.
2Adaptability or versatility
If multi-part constructions are used for plug diaphragms, then functional design flexibility is improved, but assembly and maintenance complexity increase
Solution Approach 1:
The patent employs a monolithic plug diaphragm design that integrates multiple functional elements into a single piece. This approach maintains functional design flexibility through careful geometric shaping and material selection while dramatically simplifying assembly and maintenance operations, as the unified structure eliminates the need to handle and assemble multiple separate components.
3Ease of manufacture
If gap-free connection is achieved between plug diaphragm bodies, then cleanability is improved, but manufacturing precision requirements increase
Solution Approach 1:
By creating a monolithic plug diaphragm structure, the patent inherently achieves a gap-free connection between what would otherwise be separate bodies. This eliminates the need for high-precision mating surfaces and assembly tolerances, as the unified structure is manufactured as a single piece, thereby improving cleanability without imposing stringent manufacturing precision requirements.
4Ease of repair
If replacement parts are designed with fastening contours, then ease of replacement is improved, but device complexity increases
Solution Approach 1:
The patent incorporates fastening contours directly into the monolithic plug diaphragm structure, creating built-in attachment points that enable easy replacement of specific components. This segmentation approach allows individual parts to be replaced without dismantling the entire device, improving ease of repair while adding minimal complexity since the fastening features are integrated into the existing monolithic design.
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
A plug diaphragm (2) for a process valve (4) is provided, comprising: a first body (100) with a distal section (102) facing away from a dry side (T) of the plug diaphragm (2) and a retaining section (104); and a second body (200) with an inner section (204) which holds the retaining section (104) by the inner section (204) positively surrounding the retaining section (104), with a membrane section (206) adjoining the inner section (204) in the direction of the dry side (T) and curved towards the dry side (T), and with a lateral clamping section (208) adjoining the membrane section (206) outwards.