Temperature-Indicating Brazing Fitting for Easier Pipe Welding
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Solution Overview
Problem
The manual welding process for plumbing and HVAC fittings is tedious, requires great dexterity, and is prone to errors, leading to increased costs and environmental impact due to defective joints and repeated assembly attempts.
Innovation Solution
A plumbing and HVAC fitting with integrated temperature-indicating means and flux-coated rings that facilitate easy and high-quality welding by ensuring proper positioning and temperature control, allowing assembly by both novices and professionals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual welding process is used to assemble plumbing fittings, then the joint can be formed, but the process is tedious and requires great dexterity leading to operator fatigue and errors
Solution Approach 1:
The brazing material ring is pre-installed on the fitting before the welding operation. This preliminary preparation eliminates the need for the operator to manually position and apply filler material during the welding process, significantly reducing the complexity and time of the operation while ensuring proper placement of the brazing material.
Solution Approach 2:
The brazing material is extracted from the manual application process and pre-positioned as an integrated component of the fitting. This separation of the brazing material positioning task from the welding operation itself simplifies the operator's task to merely applying heat, reducing the skill requirement and operation time.
2Reliability
If manual welding process is used, then the joint can be formed, but it requires great dexterity and concentration leading to operator fatigue
Solution Approach 1:
The fitting design incorporates the brazing material ring as a self-contained component that automatically positions itself during assembly. The ring's pre-installed location ensures it will be correctly positioned when the pipe is inserted, eliminating the need for operator intervention in positioning the filler material and reducing the skill requirement for achieving reliable joints.
Solution Approach 2:
The brazing material is pre-positioned on the fitting during manufacturing, ensuring correct placement before the welding operation. This preliminary action guarantees that the material will be in the optimal position for creating a reliable joint, removing the dependency on operator skill for proper material placement.
3Manufacturing precision
If parts are held manually during welding, then positioning can be maintained, but both hands are occupied making it impossible to hold pieces or control torch simultaneously
Solution Approach 1:
The brazing material positioning function is extracted from the operator's manual tasks and built into the fitting structure as a pre-installed ring. This allows the operator to focus solely on torch control and heat application without needing to manually position filler material, improving maneuverability while maintaining precision through the pre-positioned ring.
4Reliability
If welding operation is repeated due to defective joints, then defective joints can be corrected, but project duration increases and costs increase
Solution Approach 1:
The brazing material ring is pre-installed and secured on the fitting during manufacturing, ensuring correct positioning and quantity of filler material before the welding operation. This preliminary preparation eliminates the common causes of welding defects related to improper filler material placement, significantly reducing the need for rework and improving overall assembly productivity.
Solution Approach 2:
The design incorporates a tolerance buffer by providing the brazing material ring with sufficient material volume and secure positioning features that accommodate minor variations in assembly alignment. This beforehand cushioning prevents welding defects that would otherwise require rework, ensuring reliable joints on the first attempt and maintaining high productivity.
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
Simplifies the welding process, ensures high-quality joints on the first attempt, reduces construction duration, and lowers costs by enabling efficient assembly without additional manpower or equipment.
Implementation Method 1
a ring 9, 10 made of a brazing material... coated with a layer of a fluxing agent
Implementation Method 2
heating the joint area with a blowtorch or soldering iron to a specific temperature. Then, a wire or rod of filler material is placed in contact with the heated area. This material melts
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a plumbing fitting (1) for connecting at least two pipes (5) together, comprising a tubular element (2) made of metallic material formed of a peripheral wall (3) delimiting an internal passage (4) and having an internal face (30) and an external face (31), a first end portion (6, 7) of said tubular element (2) being shaped to cooperate with an end portion (8) of one of the pipes (5) while at least one other end portion is shaped to cooperate with an end portion of another pipe, at least one of the end portions, referred to as the "weldable end portion" (6, 7) being shaped to allow assembly by press fit and welding with the end portion (8) of the pipe (5) considered, the plumbing fitting (1) comprising at least one ring (9, 10) of a brazing material connected by fastening means to the weldable end portion (6,7) of the tubular element (2) and characterized in that it comprises means for indicating a given temperature of the end portion to be welded (6, 7) of the tubular element (2).