Metal Screw Fitting Radial Compression Sealing
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Solution Overview
Problem
Existing pipe fittings for gas pipes face issues with high wear, compatibility limitations, and the need for specialized tools and expertise, leading to reduced pneumatic sealing over time and potential gas leakage.
Innovation Solution
A metal screw fitting comprising a ring nut, threaded coupling end member, and clamping element made of metal, which provides a tool-free, easy-to-use solution for gas pipes, achieving permanent mechanical and pneumatic sealing without elastomeric gaskets, using radial compression and deformation to form a unitary assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastomeric gaskets are used for sealing, then pneumatic sealing is achieved, but compatibility is limited to certain gas types and wear occurs over time
Solution Approach 1:
The invention extracts and eliminates the elastomeric gasket from the sealing system, replacing it with a metal-to-metal sealing mechanism using conical surfaces. This removes the compatibility limitations and wear issues associated with elastomeric materials while maintaining effective pneumatic sealing for all gas types.
Solution Approach 2:
The invention changes the material parameter from elastomeric to metal, and changes the sealing mechanism parameter from contact sealing to conical compression sealing. This transformation enables universal gas compatibility and eliminates wear-related degradation of sealing performance.
2Reliability
If folders are obtained by deforming the pipe or soldering is performed, then mechanical sealing is achieved, but specialized tools and technical expertise are required
Solution Approach 1:
The fitting system is designed to be self-installing through simple screwing operations. The conical clamping element automatically deforms the pipe and creates the seal when the ring nut is screwed on, eliminating the need for specialized tools or expert techniques while maintaining reliable mechanical sealing.
3Reliability
If conventional fittings are used, then initial sealing is achieved, but pneumatic sealing reduces over time leading to gas leakage
Solution Approach 1:
The invention introduces a dynamic adjustment mechanism where the ring nut can be screwed to progressively tighten the conical clamping element on the pipe. This allows the sealing surfaces to maintain optimal contact pressure over time, compensating for any settlement or thermal expansion and preventing sealing degradation.
Solution Approach 2:
The invention uses a composite structure combining the conical clamping element, ring nut, and internal/external sealing surfaces. This multi-component metal system creates a robust, wear-resistant sealing interface that maintains its integrity and sealing capability throughout the service life of the piping system.
4Reliability
If rigid bushing and metal core are radially compressed, then mechanical sealing is guaranteed, but device complexity increases
Solution Approach 1:
The invention merges the functions of the rigid bushing and metal core into a single integrated conical clamping element. This unified component performs both the mechanical clamping and sealing functions, simplifying the overall fitting structure while maintaining reliable mechanical sealing through radial compression of the pipe.
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 ensures long-lasting, high-quality sealing for gas pipes, independent of gas type, eliminating the need for specialized tools and reducing the risk of gas leakage, while maintaining mechanical and pneumatic integrity over time.
Implementation Method 1
the clamping element (10) and the ring nut (30) are radially compressed to guarantee the mechanical sealing on the pipe
Implementation Method 2
with the formation of a gripping groove on the pipe, said groove having an annular shape
Implementation Method 3
said screwing promoting the radial compression of the clamping element (10) on the pipe
Data Source
Figure 1A~1C
Figure 2A~2F
Figure 3~4A
AI summary
A screw fitting for a gas pipe (P) comprising a threaded coupling end member (40) having a suitably shaped inner portion, mutually couplable with a ring nut (30). The fitting further comprises a clamping element (10) coaxially interposed therebetween. Such clamping element (10) comprises at least one pair of clamps (11) susceptible to be mechanically coupled with the pipe (P) upon the mutual screwing of ring nut (30) and the threaded coupling end member (40). Following such mechanical connection, the mutual coupling between the ring nut (30) and the threaded coupling end member (40) promotes the axial translation of the pipe (P) and the radial and axial compression thereof to guarantee a double pneumatic sealing.