Container Filling Dosing Valve Suction Mechanism
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Solution Overview
Problem
Existing container filling systems lack sufficient dosing accuracy, particularly when filling sensitive products like pharmaceuticals, as they fail to prevent dripping and ensure precise dosing amounts during the filling process.
Innovation Solution
A device with a suction action control mechanism downstream of the dosing valve, utilizing a diaphragm valve as a bypass valve to widen the flow path and create a suction effect when the dosing valve closes, preventing liquid return and ensuring precise dosing by interacting with the time-controlled opening of the dosing valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a time-controlled dosing valve is used to deliver dosing amounts, then the dosing process can be automated, but dosing accuracy is insufficient due to dripping and return suction of liquid
Solution Approach 1:
The suction device is activated immediately when the dosing valve closes to preemptively counteract the harmful return suction and dripping effects. By applying negative pressure at the critical moment, the system prevents liquid from flowing back into the filling line, thereby eliminating the harmful effect before it can compromise dosing accuracy.
Solution Approach 2:
The invention converts the potentially harmful pressure differential that causes return suction into a beneficial force. By deliberately creating negative pressure through the suction device, the system transforms the pressure imbalance that would normally cause liquid to flow back into a force that actively draws liquid away from the filling line, preventing dripping and ensuring precise dosing.
2Manufacturing precision
If the flow path is constricted at the choke site to control dosing amount, then dosing precision can be improved, but the device structure becomes more complex
Solution Approach 1:
The flow path at the choke site is made dynamically adjustable rather than fixed. The movable control element can shift position to either constrict the flow path for precise dosing or widen it to form a bypass when the suction device is activated. This dynamic capability allows the system to adapt its structure to different operational requirements, maintaining dosing precision while enabling the suction function.
Solution Approach 2:
The movable control element at the choke site serves multiple functions: it constricts the flow path during dosing to ensure precision, and simultaneously forms a bypass when the suction device is activated to enable the return suction effect. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving both dosing precision and liquid recovery.
3Measurement precision
If a bypass valve with movable control element is added to create suction action, then dosing accuracy is enhanced, but device complexity increases
Solution Approach 1:
The bypass valve is integrated into the existing flow path structure at the choke site, merging the suction function with the dosing control mechanism. The movable control element of the bypass valve is coordinated with the dosing valve operation, allowing both functions to share common structural elements and control mechanisms, thereby enhancing dosing accuracy while limiting the increase in overall device complexity.
Solution Approach 2:
The movable control element at the choke site acts as an intermediary that mediates between the dosing valve and the suction device. It translates the closure of the dosing valve into the activation of the bypass valve, creating a coordinated response that enhances dosing accuracy without requiring independent complex control systems for each function.
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
This solution enhances dosing accuracy by preventing dripping and ensuring precise dosing amounts, achieving maximum dosing precision and a compact, simple structure through the use of diaphragm valves and a common diaphragm for both dosing and bypass valves.
Implementation Method 1
downstream of the dosing valve (29), a suction device (31) is provided which can produce a suction action on the flow path (27) when the respective dosing processes are completed
Implementation Method 2
On the other control side of the control element, a negative pressure can be applied for producing a suction action to cause the diaphragm to execute a deflection motion
Data Source
AI summary
A device for filling containers includes an arrangement (7) for feeding filling material to at least one dosing system (5) forming a flow path (27) containing a dosing valve (29) that can be opened at least for the duration of the dosing processes to distribute the dosing amounts of the filling material via at least one filling line (9) into relevant containers. The dosing system (5) has an element (31, 33, 43) disposed in the flow path (27) downstream of the dosing valve (29) for selectively producing a suction effect in the flow path (27). A control mechanism (39) activates the element (31, 33, 43) producing the suction effect. Dosing processes are completed by closing the dosing valve (29).