Clamp Ring Metal Gas Joint With Self-Flared Double Sealing
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Solution Overview
Problem
Current gas pipe joints suffer from leakage due to the dislocation of fitting surfaces during tightening, as the metal bellow's end surface is compressed without a limit, leading to potential leaks.
Innovation Solution
A clamp ring type metal seal gas pipe joint is designed with axial contact surfaces featuring convex and concave V-shaped portions on the clamp ring and fitting joint, respectively, which compresses the bellow to form self-flared sealing surfaces, ensuring a secure fit and preventing dislocation during tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the metal bellow end surface is compressed freely during tightening, then the installation process is simple, but the fitting surface becomes dislocated causing leakage
Solution Approach 1:
The invention introduces convex and concave V-shaped portions at specific axial contact surfaces of the clamp ring and fitting joint. These localized structural features create a limited compression zone that prevents unrestricted deformation of the metal bellow end surface, thereby avoiding fitting surface dislocation while maintaining ease of installation
Solution Approach 2:
The convex and concave V-shaped portions are pre-configured on the clamp ring and fitting joint before assembly. This preliminary structural arrangement ensures that during tightening, the metal bellow end surface is guided to deform in a controlled manner along the V-shaped profiles, preventing uncontrolled dislocation and ensuring reliable sealing from the outset
2Reliability
If copper gaskets are used for sealing, then leakage prevention is achieved, but high-temperature and corrosion resistance is reduced
Solution Approach 1:
The invention removes the copper gasket component from the sealing system entirely. Instead of using a separate gasket material, the sealing function is achieved through the metal-to-metal contact between the clamp ring and fitting joint, with the convex and concave V-shaped portions creating sealing surfaces directly on the metal components. This eliminates the copper gasket's vulnerability to high temperature and corrosion while maintaining effective sealing
Solution Approach 2:
The invention employs metal-to-metal sealing surfaces formed by the interaction of the convex portion on the clamp ring and the concave portion on the fitting joint. This composite sealing approach utilizes the properties of the metal materials themselves (high-temperature and corrosion resistance) rather than relying on a separate gasket material, achieving both sealing effectiveness and environmental resistance
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 prevents leakage by creating a double sealing effect and provides high-temperature and corrosion resistance, eliminating the need for copper gaskets while ensuring a safer and more reliable connection.
Implementation Method 1
the end part of the gas pipe is compressed and self-flared to form a sealing part
Data Source
AI summary
A clamp ring type metal seal gas pipe joint is connected to one end of a gas pipe, and includes a fitting joint, a nut, and a clamp ring. Axial contact surfaces of the clamp ring and the fitting joint are respectively provided with a convex portion configured in a convex V shape and a concave portion configured in a concave V shape matched with each other, so that an end part of the gas pipe is compressed and self-flared to form a sealing part when the fitting joint is tightened. In the process of tightening the nut and the fitting joint, the end part of the metal bellow is compressed and self-flared by the convex portion of the clamp ring and the concave portion of the fitting joint to form a cone surface to realize limit fixation and form a double sealing.