Friction-Welded Stud Mounting on Curved Pipes Without Hot Work
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Solution Overview
Problem
Existing methods for repairing valves and pipes in hazardous environments are inefficient, as they often lead to chemical leaks and exposure risks for technicians due to the use of high-temperature welding processes and inadequate sealing techniques, which violate environmental regulations and pose safety hazards.
Innovation Solution
A system utilizing a friction bonding injection system that maintains positive pressure to contain hazardous chemicals during repair, using a collet and drill guide assembly to seal the drill bit and inject sealant under pressure, eliminating the need for combustible processes and minimizing emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high-temperature welding processes (arc, MIG, TIG, oxy-acetylene) are used to attach fasteners to pipes and valves, then strong mechanical connections are achieved, but hazardous chemical releases and sparks occur creating safety hazards and environmental violations
Solution Approach 1:
The patent replaces thermal welding processes with friction welding, which uses mechanical friction and pressure instead of heat and sparks to create strong mechanical connections between fasteners and pipe/valve surfaces
Solution Approach 2:
The patent uses an inert gas (such as nitrogen or argon) to create a protective atmosphere during the friction welding process, preventing hazardous chemical releases and eliminating spark-related safety hazards while maintaining connection strength
2Ease of manufacture
If traditional threading and drilling methods are used to install fittings in valve housings, then mechanical fastening is achieved, but the process exposes technicians to hazardous chemicals and creates leakage points
Solution Approach 1:
The patent replaces traditional threading and drilling operations with friction welding, eliminating multiple potential leakage points (threads, drill holes) while maintaining ease of installation through a single-step welding process
Solution Approach 2:
The patent changes the installation method from mechanical threading/drilling to friction welding by altering process parameters (applying rotational friction and axial pressure), thereby improving connection reliability and eliminating leakage risks
3Ease of repair
If existing injection processes are used to inject sealant into valves, then leak repair is achieved, but hazardous materials escape into the environment during the process
Solution Approach 1:
The patent uses an inert gas atmosphere during the sealant injection process to contain hazardous materials within the valve system, preventing their escape into the environment while maintaining effective leak repair capabilities
Solution Approach 2:
The patent introduces an inert gas as an intermediary medium that acts as a barrier between hazardous materials and the environment, allowing sealant injection to proceed effectively while preventing hazardous material emissions
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 system effectively seals leaks and repairs valves and pipes without releasing hazardous materials into the environment, ensuring technician safety and compliance with environmental regulations by maintaining zero emissions during the repair process.
Implementation Method 1
a plurality of studs being friction welded to an exterior surface
Implementation Method 2
having a block patch and a steel patch between the exterior surface and the studs
Data Source
AI summary
In some implementations, an apparatus comprises a pipe, a stud that is forge-welded to the pipe, creating a forge-welded stud, a bracket that is operably coupled to the forge-welded stud, and a ladder support operably coupled to the bracket.