Flow Indicator for Filter Press Membrane Plates
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Solution Overview
Problem
Existing flow indicators for filter presses become opaque and costly due to direct contact with the press medium, making it difficult to monitor membrane leaks efficiently, especially under high pressures.
Innovation Solution
A flow indicator system with a decoupled signal transmission and reception unit, where the flow detection unit is in contact with the press medium but not the display element, allowing for remote monitoring and operation under high pressures without clouding issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flow indicator with direct contact with press medium is used, then flow detection is possible, but the indicator becomes opaque and blind over time
Solution Approach 1:
The flow indicator is divided into separate functional components: a flow detection unit that contacts the press medium, a signal transmission unit that converts flow signals, and a display unit that presents information. This segmentation allows the display unit to remain separate from the press medium, preventing opacity while maintaining detection capability.
Solution Approach 2:
A signal transmission unit acts as an intermediary between the flow detection unit and the display unit. This intermediary converts the physical flow detection into electrical or optical signals that can be transmitted without direct contact with the press medium, enabling remote monitoring.
2Reliability
If mechanical components are used under high pressure, then flow indication is possible, but the device becomes robust and complex
Solution Approach 1:
The patent replaces direct mechanical display components with electronic or optical signal transmission systems. Instead of mechanical indicators that must withstand high pressure directly, the system uses sensors and signal transmission units that can operate at lower pressures, reducing structural complexity.
3Productivity
If flow indicators are used to locate defective membranes, then leak detection is enabled, but the indicators become opaque after certain operating time
Solution Approach 1:
The display function is extracted from the flow detection function. The flow detection unit remains in contact with the press medium to detect leaks, while the display unit is separated and does not contact the medium, allowing continuous monitoring without opacity issues.
Data Source
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Figure 3~4
AI summary
The invention relates to a flow indicator for filter presses (10') having at least one membrane filter plate (18a, 18b) and a connection line (24a, 24b) associated therewith, for supplying a pressing medium, comprising: at least one flow detection unit (26a, 26b), which is associated with one of the connection lines (24a, 24b) or one of the membrane plates and is designed to detect a flow of the pressing medium and to output signals representing said flow; a signal transmitting unit, which is operationally coupled to the flow detection unit (26a, 26b) and which is designed to receive and to transmit the outputted signals; and a signal receiving unit (28), which is designed to receive the signals emitted from the signal transmitting unit. The invention further relates to a filter press, comprising at least one flow indicator according to one of the preceding claims.