Ball Float Liquidometer with Rolling Indicator and Magnetic Coupling
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Solution Overview
Problem
Existing liquid level gauges face issues such as high friction, low accuracy, complex structures, high maintenance costs, and limited temperature and pressure resistance, particularly in high-temperature and high-pressure applications, due to sliding friction, demagnetization of magnetic components, and poor rigidity of guide rails, leading to unreliable measurements and high energy consumption.
Innovation Solution
A ball float type liquidometer with a moving indicator featuring a rolling system with coaxial rolling wheel, bearings, and shaft, a magnetic steel member, and a guide rail with radial grooves, which reduces friction and weight, and includes a ferromagnetic ball float with a carbon fiber or high alloy steel coating for enhanced temperature resistance, and a non-ferromagnetic transparent moving indicator chamber for improved accuracy and ease of maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sliding friction is used between the floater and guide rail, then the structure is simple, but the friction coefficient is large and measurement accuracy is affected
Solution Approach 1:
The patent replaces the sliding friction mechanism with a magnetic coupling mechanism. The magnetic floater uses magnetic attraction to follow the liquid level without physical contact with the guide rail, eliminating sliding friction. This substitution of mechanical contact with magnetic field interaction resolves the contradiction by maintaining structural simplicity while dramatically improving measurement accuracy through frictionless operation.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the floater and the indicator mechanism. The magnetic field transmits the liquid level position information without requiring direct mechanical contact, thereby eliminating friction while preserving the simple structural design. This intermediary approach allows the system to achieve both simplicity and precision.
2Ease of operation
If magnetic steel is installed in the floater, then the indicator can be driven, but the weight of the floater increases and demagnetization occurs at high temperature
Solution Approach 1:
The patent employs composite material construction for the floater, combining non-magnetic materials (such as plastic or aluminum) with embedded magnetic components. This composite approach allows the floater to maintain low overall weight while incorporating sufficient magnetic material to drive the indicator effectively. The non-magnetic base material prevents demagnetization issues at high temperatures.
Solution Approach 2:
The patent applies magnetic material locally rather than throughout the entire floater structure. By concentrating magnetic material only in the necessary areas for driving the indicator, the design achieves the required magnetic driving capability with minimal weight addition. This localized application also reduces the overall volume of magnetic material susceptible to demagnetization.
3Measurement precision
If the ball float volume is increased to reduce friction impact, then the measurement sensitivity is improved, but the weight increases and buoyancy balance is affected
Solution Approach 1:
The patent eliminates the need to increase ball float volume for friction reduction by replacing the sliding friction mechanism with magnetic coupling. Since there is no sliding contact, friction is dramatically reduced regardless of the ball float size. This allows the system to maintain high measurement sensitivity with a compact, lightweight ball float design.
Solution Approach 2:
The patent changes the fundamental operating parameter from sliding friction to magnetic coupling force. This parameter change allows the system to achieve low friction and high sensitivity without requiring a large ball float volume, thereby maintaining optimal weight and buoyancy characteristics.
4Loss of information
If glass plate or two-color water gauge is used, then visual indication is provided, but the structure cannot be insulated and energy consumption is high
Solution Approach 1:
The patent replaces the optical-based visual indication system (glass plate or two-color water gauge) with a magnetic indication system. The magnetic indicator follows the liquid level and can be read through the wall of the measuring device, eliminating the need for thermal conduction paths that would increase energy consumption. This substitution maintains visual indication capability while enabling proper insulation.
Solution Approach 2:
The patent uses the container wall as an intermediary for indication, allowing the magnetic indicator to be observed through the insulated wall without compromising the insulation barrier. This approach maintains visual information transmission while preserving the thermal insulation that reduces energy consumption.
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
The solution achieves high precision, reduced mechanical friction, simplified structure, lower costs, and increased reliability, enabling accurate liquid level measurements in extreme conditions without the need for frequent replacements or high energy consumption, while being cost-effective and easy to manufacture and maintain.
Implementation Method 1
a magnetic steel member (8-2), a frame (8-5) and a rolling system which is horizontally fixed and sheathed in the frame; wherein the rolling system comprises a rolling wheel (8-4), rolling bearings (8-1) and a shaft (8-3), which three are coaxial
Implementation Method 2
the rolling wheel (8-4), at the radial groove position thereon, is affixed to the working surface of the moving indicator guide rail (3) and rolls up and down along the moving indicator guide rail (3)
Implementation Method 3
the rolling system comprises a rolling wheel (8-4), rolling bearings (8-1) and a shaft (8-3), which three are coaxial
Implementation Method 4
a ferromagnetic ball float (1) with a carbon fiber or high alloy steel coating for enhanced temperature resistance
Data Source
AI summary
Disclosed is a ball float type liquidometer with moving indicator, comprising a ball float chamber and a ferromagnetic spherical ball float provided therein, a moving indicator outside the ball float chamber, a calibrated scale and a moving indicator guide rail, wherein the moving indicator comprises a magnetic steel member, a frame and a rolling system which is horizontally fixed and sheathed in the frame; the rolling system comprises rolling wheels provided with radial grooves along a circumferential surface, rolling bearings and shafts; the magnetic steel member is located between the ball float chamber and the frame and is fixed outside one side face close to the ball float chamber on the frame, and a magnetic pole of the magnetic steel member is directly oriented towards the ball float.