Liquid-Surface Detection Device Corrosion Suppression
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Solution Overview
Problem
Existing float-type liquid-surface detection devices are prone to electrolytic corrosion, which reduces detection accuracy due to the movement of ions between high- and low-potential connection parts, and require a complex configuration to suppress this corrosion.
Innovation Solution
A liquid-surface detection device with a first retaining body featuring U-shaped surrounding parts for the terminals and a second retaining body with a dividing part that protrudes, reducing the movement distance of ions and minimizing the number of parts, thereby suppressing electrolytic corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If four wall parts and a second retaining body are used to surround connection parts in a tubular shape, then electrolytic corrosion is suppressed by lengthening ion movement path, but device complexity increases due to additional parts and assembly steps
Solution Approach 1:
The patent combines the functions of the second retaining body and the four wall parts into a single integrated retaining body. This merging maintains the tubular surrounding structure that lengthens ion movement paths to suppress electrolytic corrosion, while eliminating the need for separate wall parts and reducing assembly complexity.
Solution Approach 2:
The retaining body is designed to simultaneously serve multiple functions: it retains the three terminals, provides the tubular surrounding structure for corrosion suppression, and integrates the dividing parts for structural support. This multi-functionality reduces the total number of components needed in the device.
2Reliability
If four wall parts are integrally formed with the first retaining body, then connection parts are protected from electrolytic corrosion, but manufacturing complexity increases
Solution Approach 1:
The retaining body is divided into multiple sections with dividing parts that create separate compartments for each terminal. This segmentation allows for simplified manufacturing of individual sections that can be assembled together, reducing the complexity of manufacturing a single large integrated structure while maintaining the protective tubular configuration.
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 configuration effectively reduces electrolytic corrosion by increasing the movement distance of ions and simplifies the device structure, improving detection accuracy and workability during assembly.
Implementation Method 1
a float (11) that floats on a liquid surface
Implementation Method 2
a magnetic part (20) that rotates in accordance with a movement of the float
Implementation Method 3
a detection part (31) that detects magnetism which changes due to a rotation of the magnetic part
Implementation Method 4
ions melt into the liquid from part of the high-potential connection part, and they adhere to the low-potential connection part, what is called electrolytic corrosion sometimes occurs
Data Source
AI summary
To provide a liquid-surface detection device having a small parts count, whereby electrolytic corrosion can be suppressed. A liquid-surface detection device has a detection part for detecting magnetism, a plurality of terminals connected by one end thereof to the detection part, a first retaining body for retaining the terminals and rotatably supporting a magnetic part, a second retaining body attached to the first retaining body, and electroconductive parts retained by the second retaining body and connected to other ends of the terminals. The first retaining body has substantially U-shaped surrounding parts for surrounding other ends of the plurality of terminals, respectively. The second retaining body has dividing parts overlapping between the surrounding parts.