Magnetic Float Catalyst Flow Sensor for Reactive Resin Spraying
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Solution Overview
Problem
Conventional flow sensors are unsuitable for monitoring the flow of highly reactive catalysts like methyl ethyl ketone peroxide (MEKP) under high-pressure conditions, such as those encountered in short-fiber composite manufacturing processes, as they are incompatible with the catalyst's reactive nature and pressure levels.
Innovation Solution
A catalyst flow sensor system utilizing an elongate flow tube with a float and magnet, coupled with a magnetic sensor, to detect flow rate deviations and trigger alarms when the flow is outside a desired range, avoiding seals and rotating parts prone to corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flow sensors are used to monitor catalyst flow, then flow detection is achieved, but the sensors are incompatible with highly reactive catalysts and high-pressure conditions
Solution Approach 1:
The patent replaces conventional mechanical flow sensors with a magnetic field-based detection system. A float containing a magnet moves with the catalyst flow, and its position is detected by a magnetic sensor (such as a Hall effect sensor or reed switch) without mechanical contact between the sensor and the catalyst. This eliminates the incompatibility issues of conventional sensors with highly reactive catalysts while maintaining flow detection capability under high-pressure conditions.
2Ease of operation
If seals and rotating parts are used in flow sensors, then flow measurement is enabled, but corrosion and failure occur with highly reactive catalysts
Solution Approach 1:
The patent extracts and eliminates the problematic components (seals and rotating parts) from the flow sensor design. The magnetic float system requires no seals or rotating mechanical components that could corrode. The float moves freely within the flow tube, actuating the magnetic sensor through non-contact magnetic field interaction, thereby achieving flow measurement without any parts susceptible to corrosion from highly reactive catalysts.
Solution Approach 2:
The patent replaces mechanical contact-based flow measurement with a magnetic field-based system. The float's movement is detected through magnetic field changes rather than mechanical switches or contacts. This substitution eliminates rotating parts and seals that would be exposed to corrosive catalysts, while maintaining the ability to measure flow accurately.
3Measurement precision
If high-pressure flow monitoring is implemented, then process control is improved, but conventional sensors fail under pressure conditions
Solution Approach 1:
The patent replaces pressure-sensitive mechanical sensors with a magnetic field-based detection system that is inherently more resistant to high-pressure effects. The magnetic float and magnetic sensor components are not subject to the same pressure-induced failures as conventional mechanical sensors. The system maintains measurement precision under high-pressure conditions while improving reliability through the use of pressure-resistant magnetic components.
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
Effectively monitors and alerts on the flow rate of liquid catalysts under high pressure, ensuring desired flow parameters are maintained, even with highly reactive substances like MEKP, enhancing operational safety and efficiency in spray applications.
Implementation Method 1
The electrical circuit includes a magnetic sensor located proximate the float for sensing a position of the magnet in the flow tube
Data Source
AI summary
A catalyst alarm system for resin/catalyst spray applications, the system having a first flow sensor that monitors whether a catalyst from a manifold is flowing for supply to a spay gun or other applicator at a specified minimum rate; a second flow sensor that detects if the catalyst is flowing out of a bypass conduit of the manifold, which indicates the catalyst is not being mixed with the resin; a third flow sensor that detects if the catalyst is flowing out of an over-pressure conduit of the manifold, which indicates that only a partial amount of the required catalyst is being mixed with the resin; and monitoring circuitry for providing alarm and/or control features based on activation combinations of the three flow sensors.