Press-fitting connection structure for pipeline and refrigeration device
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Solution Overview
Problem
Traditional pipeline connection methods, including threaded and press-fitting connections, face issues such as material wastage, high production costs, and unreliable fixation under fluid pressure, especially for small diameter pipes.
Innovation Solution
A press-fitting connection structure with a sealing ring and retaining ring mounted in separate grooves, eliminating the need for a closing ring, and utilizing retaining teeth to securely clamp pipes, enhancing tensile performance and compatibility with common tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded connection method is used, then connection strength is improved, but material thickness must be increased and material is wasted
Solution Approach 1:
The connection structure is divided into separate functional components: a press-fitting joint for connection, a sealing ring for sealing, and a retaining ring for locking. This segmentation allows each component to perform its specific function efficiently without requiring excessive material thickness, thereby reducing material waste while maintaining connection strength.
Solution Approach 2:
The threading process is eliminated entirely and replaced by a press-fitting mechanism with a retaining ring. By extracting the threading function and replacing it with a deformation-based locking mechanism, the patent avoids the need for deep threads and thick pipe walls, thus reducing material consumption.
2Loss of substance
If press-fitting connection is used, then material usage is reduced, but fixation reliability under fluid pressure deteriorates
Solution Approach 1:
The retaining ring is designed with localized retention teeth that concentrate the locking force at specific points on the pipe surface. This local quality approach allows the press-fitting joint to maintain thin walls for material efficiency while the localized teeth provide enhanced fixation reliability under fluid pressure through targeted mechanical interlocking.
3Device complexity
If retaining ring and sealing ring are in the same groove, then structure is simplified, but sealing ring is damaged by retaining ring
Solution Approach 1:
The patent divides the groove structure into two separate grooves: a first groove for the sealing ring and a second groove for the retaining ring. This segmentation prevents the retaining ring from damaging the sealing ring while maintaining a relatively simple overall structure, thus preserving sealing performance without excessive complexity.
4Reliability
If larger wall thickness is used, then fixation between pipe and press-fitting joint is improved, but production and processing costs increase
Solution Approach 1:
Instead of increasing the overall wall thickness of the pipe, the patent uses a retaining ring with retention teeth that provide localized mechanical interlocking. This allows the pipe to maintain a thinner, more cost-effective wall thickness while achieving reliable fixation through the concentrated locking action of the teeth at the connection interface.
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 structure provides reliable, cost-effective, and efficient pipeline connections that withstand high fluid pressure, suitable for both small and large diameter pipes, with improved tensile performance and reduced production costs.
Implementation Method 1
A sealing ring is set in the press-fitting joint, and shrinks to attach to the pipe tightly under the action of a press-fitting tool
Implementation Method 2
the retaining ring shrinks under force to cause the retaining teeth to fit into the outer wall of the pipe to be connected
Data Source
AI summary
A press-fitting connection structure for pipeline defines a first mounting groove for accommodating a retaining ring and a second mounting groove for accommodating a sealing ring, making the retaining ring and sealing ring be respectively mounted in different grooves and not easily to move. The first and second mounting grooves are spaced apart, so that the retaining ring will not come into contact with and scratch the sealing ring when the press-fitting connection structure for pipeline is subjected to the force of a press-fitting tool, thereby eliminating a closing ring originally used to protect the sealing ring, which makes assembly be more labor-saving and efficient. By means of setting a plurality of retaining teeth on the inner surface of the retaining ring, the retaining teeth can be more easily buried into the outer wall of the pipe through tip ends thereof, improving the tensile performance of the retaining ring.