Multi-Channel Hydraulic Flow Monitoring with AC Electrodes
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Solution Overview
Problem
Existing multi-channel hydraulic systems in metallurgical production fail to continuously monitor the flow rate and distribution uniformity of liquid during thermal processing, leading to non-uniform discharge and potential clogging issues, which affect the quality of thermally processed products.
Innovation Solution
The system includes a liquid chamber with a flow meter at the hydraulic inlet and measuring electrodes at each hydraulic outlet connected to a control unit via a current converter and an AC bipolar voltage source, allowing continuous monitoring of total flow rate and cross-sectional parameters of liquid jets, ensuring uniform distribution and preventing electrolytic degradation of electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct current power supply is used to power electrodes for jet detection, then the presence/absence of liquid discharge can be detected, but the electrodes undergo fast degradation due to electrolytic processes
Solution Approach 1:
The patent applies periodic action by using alternating current (AC) power supply instead of direct current (DC) to power the electrodes. The AC frequency is specifically selected based on the electrode material to prevent electrolytic degradation while maintaining effective jet detection through periodic electrical contact closure.
2Extent of automation
If hydraulic valves are installed on each water supply line to enable pulsed liquid supply monitoring, then diagnostic mode monitoring is possible, but the uniformity of liquid distribution deteriorates due to different time parameters of valve operation
Solution Approach 1:
The patent extracts the hydraulic valves from the individual nozzle supply lines and relocates them to a common supply line before the liquid chamber. This allows centralized control of liquid supply while eliminating the timing variations that occurred with distributed valves, thereby maintaining monitoring capability while improving distribution uniformity.
3Device complexity
If no flow meter is installed at the hydraulic inlet, then the system structure remains simple, but continuous monitoring of total flow rate and distribution uniformity cannot be achieved
Solution Approach 1:
The patent applies universality by using the liquid chamber itself as a common electrode for all nozzles, eliminating the need for separate reference electrodes. This multi-functional approach allows the chamber to serve both as a liquid distribution element and an electrical reference, reducing overall system complexity while enabling comprehensive flow monitoring.
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 setup enables continuous monitoring of flow rate and distribution uniformity, preventing non-uniform discharge and extending the life of measuring electrodes, thereby improving the stability and quality of thermal processing.
Implementation Method 1
A single measuring electrode is disposed in the path of the jet of liquid discharged from the hydraulic outlet... The measuring electrode is connected via a current converter... to the liquid chamber and/or the hydraulic outlets
Implementation Method 2
ensuring uniform distribution and preventing electrolytic degradation of electrodes
Data Source
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AI summary
The invention relates to apparatus for monitoring flow rate and distributional uniformity of liquid in multi-channel hydraulic system, and may be used, for example, in metallurgical production for monitoring the flow rate and uniform supply of liquid onto surfaces of products/materials being cooled, such as rolled metal products, in particular a rail during thermal processing. The apparatus for monitoring flow rate and distributional uniformity of liquid in multi-channel hydraulic system comprises a liquid chamber with a hydraulic inlet and two or more hydraulic outlets for discharge of electrically conducting liquid, as well as a flow meter being installed at the hydraulic inlet of the liquid chamber and connected to a control unit. Each hydraulic outlet is fitted with a measuring electrode disposed on the path of the jet discharged from the hydraulic outlet, the measuring electrode being connected via a current converter to the control unit and to the first output terminal of a common voltage source, the second output terminal of which is connected to the liquid chamber and/or the hydraulic outlets. The said apparatus improves the quality and provides the continuity of monitoring of thermal processing of a product/material, increases the stability of the thermal processing, provides monitoring of volume of liquid entering the liquid chamber, as well as uniformity of its distribution over the channel of the multi-channel hydraulic system, provides monitoring of time parameters of liquid jets and their cross-sections when passing through the hydraulic outlets.