Diaphragm Valve Holder Structure for Weld-Free Compact Fixation
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Solution Overview
Problem
Existing diaphragm valves require complex welding processes, increasing production steps and potentially unnecessary thick portions, which complicates the fixation and sizing of the flow path-side body.
Innovation Solution
A diaphragm valve design featuring a diaphragm-holder with ring-shaped projections that securely fix the diaphragm to the flow path-side body without requiring a thick outer periphery, allowing for downsizing of the flow path-side body by sandwiching the fixed portion and body-side projection with the diaphragm-holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fixed portion of the diaphragm is welded to the body, then the diaphragm can be fixed to the body, but the number of producing processes is increased
Solution Approach 1:
The patent replaces the welding process with a mechanical fixation system. The diaphragm-holder with its pressing portion mechanically clamps the diaphragm's fixed portion between itself and the body's pressing portion, eliminating the need for welding operations while maintaining secure fixation.
Solution Approach 2:
The diaphragm-holder acts as an intermediary component between the diaphragm and the body. This intermediate element provides the mechanical clamping function, distributing the fixation force and enabling secure attachment without direct welding between the diaphragm and body.
2Reliability
If the thickness of the flow path-side body is increased in the outer periphery of the diaphragm, then the diaphragm can be securely fixed, but the flow path-side body cannot be downsized
Solution Approach 1:
The patent moves the fixation mechanism from relying on body thickness (one dimension) to utilizing the diaphragm-holder's clamping action in a different dimensional approach. The diaphragm-holder extends outward to provide pressing force, allowing secure fixation without increasing the body's thickness in the outer periphery.
Solution Approach 2:
The diaphragm-holder serves as an intermediary that provides the necessary fixation force without requiring the body itself to be thickened. The holder's structure distributes the clamping load, enabling secure attachment while maintaining a compact body design.
Data Source
AI summary
[Object] A diaphragm can strongly be fixed to a flow path-side body by a diaphragm-holder, a thickness of the flow path-side body of an outer periphery of a diaphragm is thinned, and the flow path-side body is downsized.[Solving Means] A diaphragm-holder abutting surface 75 is formed between a diaphragm-holder inner peripheral side ring-shaped projection 73 and a diaphragm-holder outer peripheral side ring-shaped projection 74, a diaphragm-holder inner peripheral side end surface 73s is abutted against a first fixed portion piston-side end surface 63Ap, a diaphragm-holder inner peripheral side outer peripheral surface 73o is abutted against a second fixed portion inner peripheral surface 63Bi, a diaphragm-holder outer peripheral side inner peripheral surface 74i is abutted against a body-side projection outer peripheral surface 16o, and the diaphragm-holder abutting surface 75 is abutted against the second fixed portion piston-side end surface 63Bp and a body-side projection end surface 16s.