Welding Cap Cooling Line Expansion Chamber Pressure Relief
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Solution Overview
Problem
Existing cooling systems for welding caps in robotic welding technology suffer from significant loss of cooling agent during cap replacement due to pressure-induced squirting, and introducing air during refill is unavoidable in existing solutions.
Innovation Solution
A device with an expansion chamber connected to the cooling line that reduces pressure immediately upon cap removal, using a piston and back pressure system to prevent agent squirting, while maintaining the cooling agent within the line and preventing media mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If quick-acting stop valves are used to seal the cooling line during welding cap replacement, then the sealing speed is improved, but cooling agent squirting still occurs due to residual pressure
Solution Approach 1:
The expansion chamber is pre-filled with cooling agent before cap replacement. When the stop valve seals the cooling line, the pre-filled expansion chamber immediately absorbs the pressurized cooling agent, preventing squirting before the sealing is complete.
Solution Approach 2:
The expansion chamber acts as an intermediary between the sealed cooling line and the cooling agent. It provides a buffer volume that temporarily holds the pressurized cooling agent, preventing direct escape through the sealing interface.
2Loss of substance
If part of the cooling line is shut and completely discharged, then cooling agent squirting is prevented, but air ingress during refill becomes unavoidable
Solution Approach 1:
The cooling line remains continuously filled with cooling agent throughout the cap replacement process. The expansion chamber provides pressure relief without requiring discharge or refill operations, maintaining continuous fluid presence and preventing air ingress.
3Object-affected harmful factors
If the cooling line is completely discharged and refilled, then pressure-induced squirting is prevented, but cooling agent loss and air contamination occur
Solution Approach 1:
The expansion chamber is pre-filled with cooling agent to create a cushion that absorbs pressure surges before they can cause squirting. This beforehand cushioning eliminates the need to discharge the cooling line while still preventing harmful pressure effects.
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 minimizes cooling agent loss and prevents air ingress, ensuring a consistent cooling agent supply and reliable operation by equalizing pressure and isolating media sections.
Implementation Method 1
By its expansion the expansion chamber provides for a pressure equalization. The expansion chamber only gets filled until the overpressure is relieved.
Implementation Method 2
the piston is adapted to be acted upon with a back pressure
Implementation Method 3
a pneumatic pilot valve and a pressure limiting device for adjusting the back pressure are provided
Data Source
AI summary
A device for cooling welding caps of a welding apparatus includes a cooling line (10). A cooling agent is kept under pressure during removal of the welding caps. An expansion device (16) including an expansion chamber (34) is connected to the cooling line (10).