Auger Doser Mechanism with Pressure-Actuated Check Valve
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Solution Overview
Problem
Existing technologies face challenges in efficiently and accurately portioning granular materials into consistent, controlled volumes for packaging, often resulting in inconsistent dosing and inefficiencies.
Innovation Solution
A doser mechanism featuring a cylindrical shell with an auger conveyor and a check valve system that controls the flow of granular material through openings, using an auger conveyor to move material and a check valve to regulate discharge, ensuring precise and controlled dosing by adjusting the operation of the auger conveyor and valve position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a doser mechanism uses a check valve to control material flow, then dosing precision is improved, but device complexity increases
Solution Approach 1:
The check valve is designed to automatically open and close based on material flow pressure without external control. When material is conveyed by the auger, pressure builds up and automatically opens the valve; when conveyance stops, the valve automatically closes, eliminating the need for complex control systems while maintaining precise dosing
Solution Approach 2:
The check valve function is extracted as a separate, simple mechanical component from the main dosing mechanism. This modular approach allows the valve to be a straightforward pressure-actuated device rather than an integrated complex control system, reducing overall device complexity while improving dosing precision
2Productivity
If the auger conveyor operates continuously, then productivity increases, but dosing consistency deteriorates
Solution Approach 1:
The system uses periodic auger rotation combined with automatic valve operation. The auger rotates to convey material, then stops to allow the valve to close and seal the portioned dose. This periodic cycle of conveyance and sealing maintains dosing consistency while achieving high productivity through rapid cycling
Solution Approach 2:
The check valve maintains continuous sealing of previous doses while the auger prepares and conveys the next portion. This continuous sealing action ensures that even during rapid periodic cycling, each dose remains consistently sealed and protected, maintaining dosing consistency across high-volume production
3Reliability
If the check valve uses spring loading to keep the valve closed, then dosing reliability is improved, but device complexity increases
Solution Approach 1:
A spring provides a counteracting force that continuously pushes the valve toward the closed position. This simple mechanical spring loading ensures the valve reliably seals when material pressure drops, improving dosing reliability without requiring complex control systems or additional actuators
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 precise and consistent portioning of granular materials, enhancing accuracy and efficiency in supplying controlled amounts for packaging, thereby improving the consistency and precision of dosed material distribution.
Implementation Method 1
a check valve coupled to the cylindrical shell and having a valve member configured to selectively cover the second opening
Implementation Method 2
an auger conveyor including an auger at least partially extending through the internal enclosure between the first end and the second end and configured to rotate around a longitudinal axis of the auger
Implementation Method 3
The check valve may include a spring that applies a spring force to spring-load the valve member to the rest position
Data Source
AI summary
A doser mechanism includes a cylindrical shell, an auger conveyor, and a check valve. The cylindrical shell includes a hollow cylinder and an end plate. The hollow cylinder at least partially defines an internal enclosure extending between first and second ends of the hollow cylinder, a first opening at the first end, and a second opening through a thickness of the hollow cylinder. The end plate covers the second end. The auger conveyor includes an auger at least partially extending through the internal enclosure through the first end. The check valve has a valve member configured to selectively cover the second opening. The check valve may cause the valve member to move between a rest position and an open position to cover or expose the second opening in response to a magnitude of a force applied to the valve member from the internal enclosure through the second opening.