Dustproof Sprinkler Shield Ring Compression for Cleanroom Sealing
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Solution Overview
Problem
Conventional sprinklers in facilities requiring extreme dustproofing, such as semiconductor clean rooms, suffer from weak sealing forces due to the elastic nature of O-rings, which are prone to fracture under stress, compromising the dustproof performance.
Innovation Solution
A dustproof sprinkler design featuring a headnipple with a shield ring and a shield ring pressing means that compresses the shield ring to seal the gap between the headnipple and the ceiling member, enhancing the sealing force by adjusting the compression strength through a ring flange and male/female threaded connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an O-ring is elastically wound on a ring groove to seal the gap, then the O-ring can be easily installed, but the sealing force becomes weak and the O-ring becomes prone to fracture under stress
Solution Approach 1:
The patent changes the physical state of the sealing element from elastic (O-ring) to compressible (foam material). The foam material is inserted in an uncompressed state and then compressed to seal the gap, transforming the sealing mechanism from elastic deformation to compression deformation, which provides stronger and more reliable sealing force without fracture risk
Solution Approach 2:
The patent uses a foam material that can be compressed and maintains its sealing function, replacing the elastic O-ring that deteriorates over time. The foam material does not suffer from elastic fatigue and fracture issues, providing long-term reliable sealing
2Strength
If the inner diameter of the O-ring is made smaller than the outer diameter of the ring groove to increase adhesion force, then the O-ring adheres strongly to the ring groove, but the O-ring becomes less elastic over time and eventually fractures
Solution Approach 1:
The patent changes the material properties from elastic rubber (O-ring) to compressible foam. The foam material is inserted in an uncompressed state with dimensions matching the gap, then compressed to create the sealing force, eliminating the need for elastic deformation and associated fatigue problems
Solution Approach 2:
The foam material is prepared in advance in an uncompressed state that fits the gap dimensions, then compressed during installation to create the sealing effect. This preliminary preparation allows the material to maintain its properties without elastic fatigue
3Reliability
If a shield ring is compressed to seal the gap, then the sealing force is increased, but the structure becomes more complex
Solution Approach 1:
The patent extracts the compression function from a separate mechanical pressing mechanism and integrates it into the headnipple support structure itself. The headnipple support serves dual purposes: supporting the headnipple and compressing the foam material through its weight and positioning, eliminating the need for additional compression mechanisms
Solution Approach 2:
The patent combines the support function and compression function into a single integrated structure. The headnipple support both supports the headnipple assembly and compresses the foam material to create the seal, reducing overall structural complexity while maintaining effective sealing
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 significantly increases the sealing force at the gap, maximizing dustproof performance and improving assembly efficiency by allowing adjustable compression of the shield ring, thus enhancing the dustproofing capabilities of facilities like clean rooms.
Implementation Method 1
a shield ring pressing means for compressing the shield ring to seal the top of the gap when the headnipple support is secured to the top of the ceiling member
Data Source
AI summary
The invention relates to a dustproof sprinkler, the present invention aims to maximize the dustproof performance of sprinklers installed in facilities requiring extreme dustproofing, such as clean rooms, by making the headnipple descend when it is supported on the headnipple support, thereby greatly strengthening the sealing force of the shield ring that closes the gap between the outer circumference of the headnipple and the inner circumference of the through hole of the ceiling member through the compression means of the headnipple.