Flange Liner Pipe Fitting Structure for Airtight Corrosion Resistance
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Solution Overview
Problem
The existing pipe fitting structures face issues with poor airtightness between the corrosion-resistant layer and the main body unit, leading to potential leakage and hindered flow rates due to material mismatch and structural defects like cracking and bubbling, especially when handling corrosive liquids or gases.
Innovation Solution
The proposed flange liner pipe fitting structure incorporates a main body unit with a rim featuring a recessed annular groove, a neck section, and a connecting section with a roughened surface, along with a corrosion-resistant layer forming multiple retaining sections through injection molding, ensuring secure attachment and smooth flow by utilizing a mixed material like Teflon or PTFE for enhanced retention and flow smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a corrosion-resistant layer is injected onto the main body unit to cover the flow channel, then corrosion protection is improved, but flow smoothness deteriorates due to material mismatch and structural defects
Solution Approach 1:
The patent applies preliminary action by pre-forming retaining structures (retaining troughs and retaining notches) on the main body unit before injecting the corrosion-resistant layer. This ensures proper anchoring and prevents bubbling and cracking during and after injection, thereby maintaining flow channel smoothness and avoiding flow rate reduction while still achieving comprehensive corrosion protection.
Solution Approach 2:
The patent applies parameter changes by modifying the surface parameters of the main body unit through the formation of retaining structures with specific geometries (chamfered angles, depths, and positions). These parameter changes create optimal anchoring zones that allow the corrosion-resistant layer to bond securely without creating surface irregularities that would hinder flow, thus resolving the contradiction between corrosion protection and flow smoothness.
2Adaptability or versatility
If through apertures are formed in the connecting section for fastening, then connection capability is improved, but airtightness deteriorates due to cracking around the apertures
Solution Approach 1:
The patent applies preliminary action by forming retaining notches on the outer circumferential surface of the connecting section before applying the corrosion-resistant layer. These pre-formed notches provide mechanical anchoring that prevents cracking around the through apertures during fastening operations, thus maintaining airtightness while preserving the connection capability provided by the through apertures.
Solution Approach 2:
The patent applies local quality by creating specific localized retaining notches around the through apertures on the connecting section rather than uniform reinforcement. This localized approach provides targeted crack prevention at the critical stress concentration zones around the apertures while maintaining the overall airtightness and connection functionality of the pipe fitting.
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
This design enhances airtightness and flow smoothness, preventing leakage and improving the overall utilization of the pipe fitting by maintaining secure attachment of the corrosion-resistant layer and reducing hindrances in the flow channel.
Implementation Method 1
The corrosion-resistant layer 3 is molded, through injection, over inner and outer sides of the main body unit 2
Implementation Method 2
The connecting section 24 has an outer circumferential surface that is formed with a roughened supporting surface 541
Data Source
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AI summary
The present invention relates to a flange liner pipe fitting structure. The pipe fitting (4) includes a main body unit (5) and a corrosion-resistant layer (6) covering the main body unit (5). The main body unit (5) has a flow channel (5a) extending therethrough and a front end formed with a rim (51) that is formed, through recessing, a fitting groove (52). The rim (51) is provided with a neck section (53) facing rearward and defining a step with respect to the rim (51). The neck section is provided with a connecting section (54) facing rearward and having a diameter smaller than the neck section (53). The corrosion-resistant layer (6) is coated on and covers a surface of the flow channel (5a) of the main body unit (5), an end surface of the rim (51), and an outside surface of the connecting section (54). The corrosion-resistant layer (6) forms three retaining sections (61, 62, 63) on the rim (51) of the main body unit (5) and the outside surface of the connecting section (54). As such, airtightness between the corrosion-resistant layer (6) and the main body unit (5) is enhanced and smoothness of flowing through the flow channel (5a) of the main body unit (5) is improved to thereby enhance utilization of the pipe fitting (4).