Pipe Fitting Assembly With Collet Sealing for Airtight Connections
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Solution Overview
Problem
Existing pipe connection methods, such as welding, require professional skills and tools, pose fire hazards, and do not ensure airtightness between connected pipes.
Innovation Solution
A pipe-fitting device with a fitting body, fixing nut, and collet that securely connects pipes by rotating and tightening the nut, using a collet to press and seal the pipes, and includes packings to maintain airtightness and protect the sealing portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding is used to connect pipes, then connection strength is improved, but operation complexity and fire hazards increase
Solution Approach 1:
The patent replaces the welding process (thermal/chemical connection) with a mechanical connection system consisting of a fitting body, fixing nut, and collet. The collet mechanically presses against the pipe inner wall to create a secure connection without fire hazards or complex welding operations, while still providing sufficient connection strength for pipe assembly.
Solution Approach 2:
The patent introduces a fitting body as an intermediary component between two pipes. This fitting body with internal collet mechanism serves as a mediator that provides both mechanical support and sealing function, eliminating the need for direct welding between pipes while maintaining connection integrity.
2Productivity
If a fitting device with nut is used to connect pipes, then operation time is reduced, but airtightness between pipes deteriorates
Solution Approach 1:
The patent merges two separate functions into one integrated fitting body: the mechanical connection function (via fixing nut and collet) and the sealing function (via packing material). This combination allows rapid installation while ensuring airtightness, as both functions are achieved simultaneously through a single component rather than requiring separate steps.
Solution Approach 2:
The packing material (e.g., rubber packing) acts as an intermediary sealing element between the fitting body and the pipe. This packing material fills the gap and creates an airtight seal while allowing the mechanical connection to be quickly established through nut tightening, thus maintaining both speed and reliability.
3Reliability
If collet presses pipe to ensure airtightness, then sealing performance is improved, but risk of damage to pressing portion increases
Solution Approach 1:
The patent incorporates a protecting portion (buffer structure) in advance at the end of the collet's bending portion. This protecting portion acts as a cushion that absorbs impact forces and prevents direct contact between the pressing portion and the pipe end, thereby protecting the pressing portion from damage while maintaining effective sealing pressure on 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
Enables quick and safe pipe connection without expert skills or welding, ensuring airtightness and protecting the sealing mechanism from damage.
Implementation Method 1
a collet which is provided inside the fixing nut and presses the second pipe when the fixing nut is rotated and tightened
Implementation Method 2
the bending portion is bent downward
Data Source
AI summary
A pipe-fitting device according to the present invention includes a fitting body and a flare packing. The fitting body has a first end portion with an inner threaded portion, a second end portion, and a narrowest portion between the first end portion of the fitting body and the second end portion of the fitting body. The flare packing has a double plane surface having different inclination angles and is provided inside a cavity of the first end portion of the fitting body.