Gravimetric Dosing Unit Rail Support for Easier Base Maintenance
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Solution Overview
Problem
Existing gravimetric dosing units with non-vertical conveyors, particularly horizontal screw conveyors, are difficult to maintain due to complex suspensions that interfere with weight measurement during maintenance, necessitating a simpler and cost-effective suspension design.
Innovation Solution
The dosing unit is suspended from the frame above its container with a rail that rests on the container itself, allowing the base unit to be decoupled from the frame during maintenance, and a simplified suspension that supports only weight forces, not maintenance-induced forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the base unit is rigidly fixed to the frame, then structural stability is improved, but maintenance accessibility deteriorates
Solution Approach 1:
The base unit is made movable relative to the frame through a guide rail system, allowing it to be dynamically repositioned between an operating position (for dosing) and a maintenance position (for accessibility). This dynamic configuration enables the base unit to be pulled outwards along the guide rail during maintenance, resolving the contradiction between structural stability during operation and ease of maintenance.
2Device complexity
If the suspension system supports both container and base unit, then structural complexity is reduced, but measurement precision deteriorates due to interference forces
Solution Approach 1:
The support function is segmented between two independent systems: the suspension system (supporting only the container) and the guide rail system (supporting the base unit during maintenance). This segmentation ensures that maintenance forces on the base unit do not interfere with the weight measurements of the container, preserving measurement precision while maintaining structural efficiency.
Solution Approach 2:
The base unit is extracted from the suspension system and supported separately by the guide rail structure. This extraction eliminates the coupling between base unit positioning and weight measurement, allowing the scale to measure only the container's weight without interference from base unit maintenance forces.
3Measurement precision
If a complex double suspension system is used to support both container and base unit, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The base unit support function is extracted from the suspension system and assigned to the guide rail structure. This extraction simplifies the suspension system to support only the container, eliminating the need for complex double suspension mechanisms while maintaining measurement precision through proper force decoupling.
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 design ensures precise dosing by decoupling the dosing unit from frame forces during operation, facilitating easy maintenance and maintaining accurate weight measurement.
Implementation Method 1
The feeder sits on a scale; therefore, the weight registered by the scale is the gross weight, i.e., the known and constant weight of the feeder components (tare) plus the variable weight of the bulk material currently present in the container and base unit (net weight).
Implementation Method 2
a simplified, cost-effective suspension that is designed only for stress in the direction of the weight force, but not for stress caused by the forces acting in all directions during maintenance
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The gravimetric metering unit according to the invention for bulk materials has a metering device which has a container for bulk material to be metered and a base unit with a horizontally arranged conveyor for the bulk material. The container and the base unit can be separated from each other for maintenance purposes. The metering unit also comprises a frame that is equipped with at least one scale on which the metering device is supported during operation via a mounting such that the metering unit is designed for a gravimetric metering process, wherein the mounting is connected to the container of the metering device and supports the metering device via the container. The container is provided with a rail which protrudes away from the container, and the base unit has a supporting structure which runs on the rail such that the supporting structure can be moved back and forth between an operating position and a maintenance position. In this manner, an easier maintenance of the base unit is facilitated without allowing the mounting of the metering unit to be overstressed by forces exerted onto the base unit.