Filling System Overpressure Control via Inert Gas
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Solution Overview
Problem
Existing filling systems are limited in their ability to perform overpressure filling while maintaining the simplicity and reliability of normal-pressure filling processes.
Innovation Solution
The filling system incorporates an additional control valve in the connection between the return gas pipe and the gas space above the filling material in the boiler, allowing for precise control of inert gas pressure to facilitate both normal and overpressure filling methods using the Trinox process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If overpressure filling is implemented using conventional systems, then filling capability is improved, but device complexity increases due to additional valves and pressure control mechanisms
Solution Approach 1:
The gas space above the filling material in the boiler serves multiple functions: it receives return gas during normal filling operations and acts as a pressure control chamber during overpressure filling. By utilizing the existing gas space for dual purposes, the system achieves overpressure filling capability without adding separate pressure control chambers or complex valve arrangements, thus maintaining simplicity while enhancing versatility
Solution Approach 2:
The inert gas in the gas space above the filling material acts as an intermediary medium that transmits pressure during overpressure filling. Instead of requiring direct pressure application mechanisms, the system uses the compressible gas medium to indirectly transmit pressure to the filling material, simplifying the pressure control mechanism while enabling overpressure filling capability
2Manufacturing precision
If precise filling level adjustment is achieved during overpressure filling, then manufacturing precision is improved, but control complexity increases
Solution Approach 1:
The system employs feedback control where the position of the lower end of the return gas pipe relative to the filling material level provides continuous information about filling progress. During overpressure filling, this geometric relationship serves as a natural feedback mechanism that automatically terminates filling when the desired level is reached, eliminating the need for complex electronic sensors and control systems while maintaining precise filling level adjustment
Solution Approach 2:
The filling process is self-regulating through the Trinox method, where the return gas pipe automatically determines the filling level based on its fixed position. The system uses its own structural elements (return gas pipe, filling material level) to control the filling process without external intervention, achieving precise filling level adjustment through passive geometric constraints rather than active control mechanisms
3Manufacturing precision
If Trinox process is used for fill level correction, then manufacturing precision is improved, but process time increases
Solution Approach 1:
The return gas pipe is pre-positioned at the exact desired filling level during system setup. This preliminary positioning ensures that the Trinox process terminates automatically at the correct level without requiring measurement or adjustment during operation. The fill level accuracy is predetermined by the fixed geometry of the return gas pipe, eliminating the need for time-consuming fill level measurements and corrections during each filling cycle
Solution Approach 2:
The Trinox process rapidly removes excess filling material through the return gas pipe using pressure differential. By applying pressure to force the liquid through the return gas pipe quickly, the system achieves precise fill level correction in minimal time, rushing through the correction phase rather than slowly adjusting the level
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 efficient overpressure filling with precise filling level adjustment, reducing foaming and eliminating the need for a relief valve, while maintaining a simplified construction and control mechanism with only two pneumatically controlled valves per filling element.
Implementation Method 1
a filling system for filling containers (2) with a liquid product... pressure filling... overpressure filling... pressurized gaseous and/or vaporous fluid, for example with a pressurized inert gas
Implementation Method 2
a negative pressure is maintained in the chamber, which is dimensioned in such a way that the pressure difference between the liquid pressure and the negative pressure is greater than the critical pressure difference of the throttle
Implementation Method 3
a fill level correction is carried out by the liquid above the section of the return gas pipe being displaced by means of the pressure of the clamping gas via the return gas pipe into a space with lower pressure
Data Source
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AI summary
The invention relates to a filling system for filling bottles or similar containers (2) with a liquid filling material, said system comprising at least one filling element (3), a liquid channel (8) formed in a housing (7) of the filling element and connected to a tank (10) for providing the liquid filling material, and at least one outlet (11) for dispensing the liquid filling material into the respective container attached to the filling element. Said filling system also comprises a liquid valve (13) in the liquid channel, a gas return tube (20) that projects past the at least one outlet on one end, for controlling the level of the filling material in the filled container, and is connected to a gas chamber (10.2), formed for example in the tank, by means of a fluid connection (22). The filling system also comprises an open fluid channel (14, 16, 17) inside the filling element, in the region of the outlet. Said channel can be connected to a ring channel (19) guiding a gaseous and/or vaporous fluid under pressure, preferably an inert gas under pressure, and controlled by at least one first control valve (18).