Pipe-to-Fitting Buckling Joint for Zero-Gap High-Pressure Sealing
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Solution Overview
Problem
Existing methods for connecting pipelines in high-pressure fluid-carrying systems, such as those in commercial vehicle applications, require additional assembly components and complex processes like soldering or screwing, and often result in non-reliable sealing gaps that can lead to permanent damage if not properly managed.
Innovation Solution
A method for establishing a form-fit connection between a tubular component and a connecting part using a circumferential fastening groove, where the pipe part is buckled into the groove using a tool exerting force in the longitudinal direction, eliminating the need for additional assembly components and achieving a sealing gap of zero, thereby ensuring a permanent and high-pressure-resistant connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional screw or soldering connection methods are used, then the connection can be established between pipe and connecting part, but the process becomes complex and requires additional steps like surface coating and leak checking
Solution Approach 1:
The invention extracts and eliminates the need for additional assembly components (screws, seals, coating layers) by directly forming the connection structure through pipe deformation. The pipe end is buckled to create an integrated connection with the connecting part, removing all auxiliary components from the assembly process.
Solution Approach 2:
The pipe end itself serves as both the connecting element and the sealing element. By deforming the pipe end through buckling, it creates its own connection structure that integrates both mechanical attachment and sealing functions, making the pipe self-sufficient for connection purposes without requiring separate components.
2Reliability
If support rings are introduced to ensure high-pressure sealing, then sealing reliability improves, but the number of assembly components increases
Solution Approach 1:
The invention removes the support ring component entirely by using the pipe end's own deformed structure to provide the sealing function. The buckled pipe end creates a form-fit connection that inherently provides sealing without requiring additional support rings or sealing elements.
Solution Approach 2:
The pipe end deformation serves dual purposes: creating mechanical interlocking for attachment and forming the sealing interface. The buckled structure of the pipe end itself provides the sealing action, eliminating the need for separate support rings that would otherwise be required for high-pressure sealing.
3Device complexity
If a form-fit connection is established by forming the pipe, then coating components can be used and assembly is simplified, but the sealing gap may be too large leading to permanent damage
Solution Approach 1:
The invention uses dynamic deformation of the pipe end through buckling to achieve the optimal connection state. The pipe end is actively deformed during assembly to create a tight form-fit connection, transitioning from a simple insertion to a controlled deformation process that ensures both simplicity and sealing reliability.
Solution Approach 2:
The invention changes the geometric parameters of the pipe end through buckling deformation. By controlling the deformation parameters (buckling distance, force application), the pipe end creates a connection with minimal sealing gap while maintaining assembly simplicity. The deformation transforms the pipe end geometry to achieve both goals.
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 method provides a reliable, reproducible, and zero-sealing-gap connection suitable for high-pressure applications without additional components, enhancing the connection's durability and reducing the risk of damage, while also simplifying assembly and improving tightness through the use of elastic sealing rings.
Implementation Method 1
a tool is used to exert a force acting in the longitudinal direction of the pipe part on the end of the tube part which is present in the connecting part until the pipe part is at least partially buckled out into the fastening groove
Implementation Method 2
the pipe part is at least partially buckled out into the fastening groove and the pipe part and the connecting part are permanently connected
Data Source
AI summary
In a method for the form-fit connection of a tubular component to a connecting part, the connecting part includes a through-hole with a connection end and a connecting end. A circumferential fastening groove is arranged on the inner surface of the connection end. One end of the pipe part is inserted into the through-hole of the connection end and secured against axial displacement. A tool is then used to exert a force acting in the longitudinal direction of the pipe part on the end of the pipe part present in the connecting part until the pipe part buckles out into the fastening groove, at least in some areas, and the pipe part and connecting part are permanently connected.