Welding Ring With Inward Loop For Plastic Pipe Fitting
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Solution Overview
Problem
Existing devices for connecting plastic pipes, such as welding rings, face difficulties in being easily and quickly inserted into fittings without damage, particularly due to their larger diameter compared to the fitting, and in managing connecting wires neatly and in parallel.
Innovation Solution
A welding ring with an inwardly extending loop that can be secured using a cable tie or wire, allowing for easy insertion and anchoring within the pipe fitting, with connecting wires arranged outside the connecting area to minimize damage risk, and a method involving forming a loop, inserting, and cutting off the fastening device to ensure proper positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the welding ring has a larger diameter than the fitting to ensure proper connection, then the connection reliability is improved, but the ease of insertion deteriorates and damage risk increases
Solution Approach 1:
The welding ring incorporates a flexible loop that can dynamically change its configuration. During insertion, the loop is deformed to a compact state to pass through the fitting opening, then returns to its expanded circular state once inside, providing the necessary diameter for reliable connection while maintaining ease of insertion.
Solution Approach 2:
The welding ring is designed with a nested structure where the flexible loop can be collapsed or folded into a compact form that fits within the fitting opening during insertion, similar to how nested dolls store one inside another. After insertion, the loop expands to its full functional size.
2Reliability
If the welding ring has a larger diameter than the fitting to ensure proper connection, then the connection reliability is improved, but the damage risk to the welding ring increases
Solution Approach 1:
The flexible loop provides dynamic adaptability during the insertion process, allowing the welding ring to temporarily reduce its effective diameter by deforming the loop, thereby passing through the fitting opening without excessive force that could cause damage to the connecting wires or other components.
Solution Approach 2:
The welding ring utilizes changes in the physical state or configuration of the flexible loop material, allowing it to transition between a compact inserted state and an expanded functional state, thereby avoiding damage during insertion while maintaining proper connection dimensions.
3Ease of operation
If the connecting wires are arranged within the fitting to ensure neatness, then the ease of operation is improved, but the damage risk increases
Solution Approach 1:
The connecting wires are extracted from the fitting interior and routed externally along the outer surface of the welding ring. This separation removes the wires from the high-risk insertion path, eliminating the danger of them being pinched or damaged while still allowing for neat arrangement and management outside the fitting.
4Productivity
If the welding ring is inserted quickly to improve productivity, then the productivity is improved, but the manufacturing precision deteriorates
Solution Approach 1:
The flexible loop provides self-aligning properties during insertion. As the welding ring is quickly inserted, the loop naturally deforms and guides itself into the correct position within the fitting, eliminating the need for slow, careful manual positioning while still achieving precise placement through the material's inherent elastic recovery.
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 easy, fast, and damage-free insertion of the welding ring into the pipe fitting, ensuring the loop's position is maintained and reducing the risk of damaging connecting wires, facilitating a secure and efficient connection.
Implementation Method 1
a resistance wire being preferably wound spirally around the extension hose
Implementation Method 2
after melting
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
We present and describe a device for connecting plastic pipes, consisting essentially of a welding ring having an extension hose with an inner cavity, a resistance wire being preferably wound spirally around the extension hose and being, in turn, encased in a plastic sheath which provides a firmly bonded joint of the abutting plastic pipes after melting, as well as a method for arranging a welding ring in a groove of a plastic pipe. The aim of the invention is to provide a new device for connecting plastic pipes – briefly called a welding ring – which can be fastened to the fitting of a plastic pipe in an easier and faster way, whereby damage to the welding ring should be eliminated. This aim is achieved by providing the welding ring with at least one inwards extending loop before the installation.