Union Nut Pipe Fitting Retaining Ring for Pull-Out Prevention
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Solution Overview
Problem
Conventional pipe detachment preventing devices for union nut pipe fittings require an inner core for effective operation, increasing production costs and risking pipe detachment if the core is omitted, 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 maintain biting resistance into the joint pipe even when stretched, preventing detachment under large pulling forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inner core is inserted into the joint pipe to prevent detachment, then the pipe connection reliability is improved, but the production cost increases and the device complexity increases
Solution Approach 1:
The invention extracts and eliminates the inner core component from the pipe connection system. Instead of using a separate inner core inserted into the joint pipe, the retaining ring itself is designed with integrated blade portions that directly bite into the joint pipe wall, achieving the same anti-detachment function without the need for an additional inner core component.
Solution Approach 2:
The invention merges the functions of the retaining ring and the anti-detachment mechanism into a single integrated component. The blade portions are formed as integral parts of the retaining ring body, combining the pipe retention function and the anti-detachment function into one unified structure, thereby reducing device complexity and eliminating the need for separate inner cores.
2Reliability
If an inner core is inserted into the joint pipe to prevent detachment, then the pipe connection reliability is improved, but the production cost increases
Solution Approach 1:
The invention extracts and eliminates the inner core component from the pipe connection system. Instead of using a separate inner core inserted into the joint pipe, the retaining ring itself is designed with integrated blade portions that directly bite into the joint pipe wall, achieving the same anti-detachment function without the need for an additional inner core component.
Solution Approach 2:
The invention merges the functions of the retaining ring and the anti-detachment mechanism into a single integrated component. The blade portions are formed as integral parts of the retaining ring body, combining the pipe retention function and the anti-detachment function into one unified structure, thereby reducing device complexity and eliminating the need for separate inner cores.
3Force
If the retaining ring diameter is reduced to make the blade portion bite into the joint pipe, then the anti-detachment force is improved, but the pipe stretching flexibility is reduced
Solution Approach 1:
The invention applies the dynamics principle by making the retaining ring capable of changing its diameter dynamically. The retaining ring is designed to be compressible in the radial direction, allowing it to expand when the pipe needs to stretch and contract when anti-detachment force is needed. This dynamic adaptability enables the blade portions to bite into the pipe wall for prevention while still allowing pipe stretching flexibility.
Solution Approach 2:
The invention changes the physical parameter of the retaining ring diameter based on operational needs. The retaining ring can change its diameter in response to pipe stretching forces, expanding to accommodate pipe growth while maintaining the ability to compress and bite into the pipe wall for anti-detachment. This parameter change capability resolves the contradiction between fixed biting force and flexible adaptability.
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 solution effectively prevents pipe detachment without an inner core, ensuring the connection remains secure even when the joint pipe is stretched, while allowing for flexible stretching and contraction, thus reducing production costs and enhancing reliability.
Implementation Method 1
a blade portion which is provided on an inner side of the retaining ring body and which bites into the joint pipe due to diameter reduction by the tightening means
Implementation Method 2
the connection holding means includes an inclination mechanism configured to incline the retaining ring in the pipe axis direction with respect to a reference plane orthogonal to a central axis of the retaining ring body
Data Source
Figure 1~2
Figure 3~4
Figure 5~6A
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).