Union Nut Pipe Fitting Retaining Ring for Pull-Out Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pipe detachment preventing devices for union nut pipe fittings require an inner core, increasing production costs and risking detachment if forgotten, especially under large pulling forces.
Innovation Solution
A pipe detachment preventing device that omits the inner core by using a retaining ring with protruding portions and a locking tool with facing portions, combined with an inclination mechanism that adjusts the retaining ring's position to enhance biting resistance when a pulling force is applied, ensuring the pipe remains attached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inner core is inserted into the joint pipe to prevent detachment, then the reliability of pipe connection is improved, but the device complexity and production cost increase
Solution Approach 1:
The invention extracts and eliminates the inner core component from the pipe connection system. Instead of inserting an inner core into the joint pipe, the patent uses a retaining ring with blade portions that bite into the outer peripheral surface of the joint pipe, thereby achieving detachment prevention without the complex inner core structure.
Solution Approach 2:
The retaining ring with blade portions serves as a simple, cost-effective alternative to the expensive and complex inner core. The blade portions are designed to bite into the pipe surface temporarily during installation to prevent detachment, fulfilling their function without requiring permanent internal structural modifications.
2Reliability
If an inner core is inserted into the joint pipe, then the reliability of pipe connection is improved, but the ease of manufacture deteriorates due to additional insertion steps
Solution Approach 1:
The invention removes the inner core insertion step from the manufacturing process. The retaining ring is installed externally on the joint pipe and secured by tightening means, eliminating the need for internal core insertion and simplifying the overall manufacturing procedure.
Solution Approach 2:
Instead of inserting a component inside the pipe (inner core), the invention inverts the approach by placing the retaining mechanism outside the pipe and having it bite into the pipe's outer surface. This inversion simplifies the installation process by avoiding internal access requirements.
3Strength
If the retaining ring is made rigid to prevent detachment under pulling force, then the strength of connection is improved, but the adaptability to pipe stretching deteriorates
Solution Approach 1:
The retaining ring is designed with dynamic characteristics, incorporating elastic portions that allow the ring to flex and adapt when the pipe stretches. The blade portions can bite into the pipe surface with controlled force, providing strong attachment while accommodating pipe movement through elastic deformation of the ring structure.
Solution Approach 2:
The retaining ring structure changes its physical parameters (shape, position) in response to pipe stretching. When the pipe expands or contracts, the elastic portions of the retaining ring deform accordingly, maintaining the biting force of the blade portions on the pipe surface while adapting to the changing pipe dimensions.
Data Source
AI summary
Provided is a pipe detachment preventing device, for a union nut pipe fitting, which can omit an inner core and which can prevent detachment of a pipe from a pipe fitting even when a large pulling force which stretches the pipe acts. Connection holding means (7) includes an inclination mechanism (8) configured to incline a retaining ring (4A) in a pipe axis direction (X) with respect to a reference plane (P) orthogonal to a central axis (C) of a retaining ring body (40), such that one of a circumferential center portion (40y) and a circumferential end portion (40x) of a retaining ring body (40A) is caused to be closer to a fitting body (2) and the other is moved away from the fitting body (2), when first protruding portions (41) and first facing portions (55) come into contact with each other and a pipe pulling force which stretches a joint pipe (100) is applied to the joint pipe (100).