Intrinsically Safe Explosion-Proof Level Meter Design
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Solution Overview
Problem
Existing explosion-proof level meters with intrinsically safe structures face complications due to poor visibility and operability, as well as complex installation and wiring designs, primarily because they require long intrinsically safe dedication wiring to prevent electromagnetic and electrostatic interference.
Innovation Solution
An intrinsically safe explosion-proof level meter design that incorporates a level meter main body with a transmission circuit, reception circuit, level determination unit, operation switch, and display portion, along with a power supply path featuring an intrinsically safe explosion-proof barrier and pressure-resistant explosion-proof box, simplifying the design and reducing the need for complex wiring by eliminating the need for a pressure-resistant housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure-resistant explosion-proof housing is used to cover the level meter, then explosion protection is achieved, but visibility of display is poor and operability is low
Solution Approach 1:
The patent extracts the intrinsically safe barrier from the pressure-resistant housing, allowing the level meter to be installed in a dangerous place without requiring a pressure-resistant housing. The intrinsically safe barrier is placed in a safe place and connected via intrinsically safe dedication wiring, eliminating the need for the pressure-resistant housing and thereby improving visibility and operability while maintaining explosion protection through the intrinsically safe circuit design
2Reliability
If intrinsically safe dedication wiring is used to connect the level meter and barrier, then electromagnetic induction and electrostatic induction are prevented, but the wiring becomes inevitably long and design becomes complicated
Solution Approach 1:
The patent introduces an intrinsically safe barrier as an intermediary device between the safe place and dangerous place. This barrier receives signals from the level meter via intrinsically safe dedication wiring and transmits them to the control panel, while also providing power and communication pathways. The barrier acts as a mediator that enables the level meter to function in a dangerous place without requiring direct long wiring runs to the control panel, thereby reducing overall system complexity while maintaining electromagnetic interference prevention
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 enhances visibility and operability while simplifying installation and wiring by using an intrinsically safe explosion-proof barrier within a pressure-resistant box, reducing the length of necessary wiring and improving the overall design complexity.
Implementation Method 1
an intrinsically safe explosion-proof barrier that is an intrinsically safe-related device connected to a level meter that is an intrinsically safe device. The intrinsically safe explosion-proof barrier prevents the level meter main body from becoming an ignition source
Implementation Method 2
The transmission circuit transmits a measurement signal for measuring the level of the object. The reception circuit receives the measurement signal reflected by the object
Implementation Method 3
The reception circuit receives the measurement signal reflected by the object
Data Source
AI summary
Provided is an intrinsically safe explosion-proof level meter that can be simplified in design. An intrinsically safe explosion-proof level meter includes a level meter main body and a power supply path to measure a level of an object stored in a container. The level meter main body includes a transmission circuit, a reception circuit, a level determination unit, an operation switch, and a display. The transmission circuit transmits the measurement signal. The level determination unit determines the level based on the measurement signal received by the reception circuit and the information on the container. The display displays the determined level. The power supply path has an intrinsically safe explosion-proof barrier that prevents the level meter main body from becoming an ignition source, and a pressure-resistant explosion-proof box that accommodates the intrinsically safe explosion-proof barrier.