Biogas Agitator Height Adjustment with Tension-Locking Drum
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Solution Overview
Problem
The existing height adjustment mechanism for agitators in biogas plants is prone to jamming and entanglement issues, leading to potential damage and increased maintenance costs due to maloperation or malfunction, where the cable may unwind uncontrollably if the agitator is not simultaneously displaced downwardly.
Innovation Solution
A height adjusting device with a fixing mechanism that prevents further unwinding of the displacement member from the drum device unless it is retained tautly between the drum device and the agitating device, utilizing a disk device and fixing member to block unwinding and ensure the displacement member is always tensioned, thereby preventing damage and entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cable is unwound from the cable spool to lower the agitator, then the agitator can be displaced downwardly, but the agitator may get stuck or jammed on the mast causing the cable to become entangled
Solution Approach 1:
The fixing device is configured to automatically engage and prevent further cable unwinding when the agitator becomes jammed or stuck on the mast. This preliminary protective action occurs before cable entanglement can occur, blocking the drum device from continuing to rotate and unwind the cable when abnormal resistance is detected
Solution Approach 2:
The fixing device acts as an intermediary safety mechanism between the drum device and the agitating device. It monitors the tension state of the displacement member and intervenes by blocking the drum device when abnormal conditions are detected, preventing direct transmission of harmful motion to the cable and agitator
2Reliability
If the cable length increases between the cable spool and the jammed agitator, then the agitator can remain in position, but the cable may become entangled in the agitator causing damage
Solution Approach 1:
The fixing device provides preliminary protection by automatically blocking the drum device when cable tension becomes abnormal, preventing the cable from becoming entangled in the agitator. This safety mechanism engages before entanglement can occur, stopping the unwinding process at the critical moment when the agitator becomes jammed
Solution Approach 2:
The fixing device operates autonomously based on the tension state of the displacement member itself. The system self-regulates by using the cable tension as the triggering condition for engagement, eliminating the need for external sensors or complex control systems to detect jamming conditions
3Adaptability or versatility
If the displacement member is not retained tautly between the drum device and the agitating device, then the agitator can be positioned flexibly, but the displacement member may unwind uncontrollably from the drum device
Solution Approach 1:
The fixing device provides preliminary protection by automatically blocking the drum device when the displacement member becomes slack or is not retained tautly. This prevents uncontrolled unwinding before it can occur, engaging the blocking function when abnormal tension conditions are detected
Solution Approach 2:
The fixing device continuously monitors the tension state of the displacement member and provides feedback control. When the displacement member is properly tensioned, the fixing device remains disengaged allowing normal operation. When tension becomes abnormal (slack or excessive), the fixing device automatically engages to prevent uncontrolled unwinding
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 ensures safe and reliable operation of the agitating device by preventing unwinding when the displacement member is not tautly retained, reducing the risk of damage to the agitator and supply lines, and facilitating easier maintenance by ensuring the agitator can only be lowered further if it is properly displaced downwardly.
Implementation Method 1
at least one fixing device (7) is provided which is suitable and configured to fix the drum device (5) at least temporarily to at least prevent the displacement member (6) from unwinding
Implementation Method 2
ensure that the displacement member is always tensioned, thereby preventing damage and entanglement
Data Source
AI summary
Height adjusting device (1) for adjusting the height of an agitating device (2) in a digester (101) of a biogas plant (100), biogas plant (100) comprising a digester (101), a support unit (10), a displacement member (6), an agitating device (2), and a height adjusting device, and method for operating an agitating device (2). The height adjusting device comprises a housing unit (4), a drum device (5) rotatably accommodated on the housing unit (4), and a displacement member (6). The displacement member (6) is in functional connection with the drum device (5) and the agitating device (2) and the displacement member (6), depending on the direction of rotation of the drum device (5), can be wound onto the drum device (5) or unwound from the drum device (5) in sections, so that the agitating device (2) can be displaced upwardly or downwardly. Furthermore a fixing device (7) is provided which is suitable and configured to fix the drum device (5) at least temporarily to prevent the displacement member (6) from unwinding if the displacement member (6) is not retained tautly between the drum device (5) and the agitating device (2).