Gas Tight Pipe Connection With Intermediate Hollow Space
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Solution Overview
Problem
Existing pipe connections face challenges in maintaining high sealing quality under high pressure and load conditions, with complex sealing surfaces increasing manufacturing costs and susceptibility to material deformation and leakage.
Innovation Solution
A pipe connection design featuring three regions with press fit and stop surfaces of truncated cone shape, inclined at 1:10, and a coaxial intermediate hollow space for reduced material stress and improved sealing, allowing for a contact-free transition that enhances surface pressure distribution and reduces tension spikes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex sealing surface shapings are used to improve sealing quality, then sealing quality is improved, but manufacturing cost increases due to higher chip-removing processing expenditures
Solution Approach 1:
The connection region is divided into three distinct zones: a first contact region with press-fit and stop surfaces, a second contact region with additional press-fit and stop surfaces, and an intermediate non-contact region separating them. This segmentation allows each region to perform its function independently, achieving high sealing quality through simplified conical surfaces rather than complex continuous shapings, thereby reducing manufacturing costs.
2Reliability
If higher conicity of press surfaces is used to achieve improved sealing effect, then sealing effect is improved, but manufacturing effort increases
Solution Approach 1:
Different conicity values are assigned to different contact regions: the first contact region has a first conicity value while the second contact region has a second conicity value. This local differentiation allows optimization of sealing effect in each region without requiring uniformly high conicity throughout, reducing overall manufacturing effort while maintaining effective sealing.
3Strength
If press fit and stop surfaces are in direct contact to achieve connection, then connection strength is improved, but material stress increases leading to plastic deformations and tears
Solution Approach 1:
A coaxial intermediate space or hollow space is introduced between the press-fit and stop surfaces of the inner and outer pipe parts. This intermediate region acts as a mediator that allows the connection to maintain strength through the distributed contact regions while reducing peak material stress by preventing direct continuous contact, thereby avoiding plastic deformations and material tears.
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 maintains sealing integrity under nominal and overload conditions, reduces material stress, and facilitates easier assembly and disassembly with improved mechanical and elastic properties, ensuring reliable seal tightness and cost-effective manufacturing.
Implementation Method 1
an avoidance of tension spikes in respect to the appearance of plastic deformations and the initiation of tears in the material
Implementation Method 2
a mutual, axial contact-pressing (fully engaged) of the pipe endings for example by means of a thread connection or similar
Data Source
AI summary
A gas-tight pipe connection that has inner and outer pipe parts which when joined create a gas tight seal. The inner pipe part has a press fit surface, a stop surface, and a transition surface between the press fit surface and the stop surface. The outer pipe has an outer collar, a press fit surface, and a stop surface as well as a recess in its interior wall which extends from the press fit surface to the stop surface. When the outer pipe part is joined with the inner pipe part, the connection forms a press fit region, a stop region, and a transition region, where the transition region forms a coaxial intermediate space or hollow space.