Gas Chromatograph Multi-Circuit Power Supply for Intrinsic Safety
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Solution Overview
Problem
Current gas chromatographs with single-circuit power supply modes pose safety hazards due to high energy storage, leading to potential explosions in explosion-proof chambers, as sparks can ignite hazardous gases.
Innovation Solution
Converting the single-circuit power supply mode to a multi-circuit power supply mode, where each component, such as temperature control, pressure control, and signal acquisition circuits, is powered by independent direct-current power supplies (DC5V-DC36V) with each supply having an output current of less than or equal to 3A, reducing overall energy storage and risk of sparks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-circuit power supply mode is used in the gas chromatograph, then the device complexity is reduced and ease of manufacture is improved, but the energy storage in circuits becomes excessively high, generating sparks and causing explosion hazards
Solution Approach 1:
The patent divides the single power supply circuit into multiple independent power supply circuits (at least two). Each power supply circuit independently powers specific functional modules within the explosion-proof chamber, thereby segmenting the energy storage and reducing the risk of high-energy sparks that could ignite hazardous gases.
2Reliability
If multiple independent power supplies are used to reduce energy storage and eliminate sparks, then safety is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The power supply system is segmented into multiple independent circuits, each with controlled energy output. This segmentation ensures that even if one circuit fails or generates a spark, the energy is insufficient to cause an explosion, thereby improving intrinsic safety while maintaining manageable complexity through modular design.
Data Source
AI summary
Disclosed is a power supply method for an intrinsically-safe gas chromatograph. The power supply method includes: converting an original single-circuit power supply mode in a gas chromatograph into a multi-circuit power supply mode, so as to respectively supply power for a temperature control circuit, a pressure control circuit, a signal acquisition circuit, a communication circuit, a heating wire, an air extracting pump, a solenoid valve and a proportional solenoid valve in the gas chromatograph, wherein power supplies in the multi-circuit power supply mode of the gas chromatograph are all independent power supplies, and are not associated with each other; the number of the power supplies of the multi-circuit power supply mode is greater than or equal to 2; each power supply in the multi-circuit power supply mode is a direct-current power supply, and the voltage of each direct-current power supply is DC5V-DC36V; and the temperature control circuit, the pressure control circuit, the signal acquisition circuit, the communication circuit, the heating wire, the air extracting pump, the solenoid valve and the proportional solenoid valve in the gas chromatograph are combined in different modes, and are correspondingly powered by a plurality of power supply circuits; and an output current of the independent power supply is less than or equal to 3 A.