System for controlling gas circuit of chromatographic sample

Abstract

The invention belongs to a real-time monitoring system, is a system for controlling a gas circuit of a chromatographic sample aiming at the pressure change in a gas circuit of a chromatographic sample of a data logging unit in the oil industry, and is characterized in that the sample gas is divided into two circuits by a tri-way valve, one circuit leads to a chromatograph via a sample pump and a vacuum gauge; the other circuit leads to an air pressure sensor, the output end of the air pressure sensor is connected with the input end of an instrumentation amplifier, the output end of the instrumentation amplifier is electrically connected with the signal input end of an A / D converter, and the data output end and the control end of the A / D converter are electrically connected with the data end and the control end of a singlechip respectively; the I / O port of the singlechip is electrically connected with a sound-light alarm circuit and an LED numeral tube display; and the I / O port of the singlechip is electrically connected with a drive circuit of a relay, the drive circuit is electrically connected with the control end of the relay, and the normally open switch or the normally closedswitch of the relay is connected in a power circuit of the sample pump in series. The invention provides a system for controlling the gas circuit of the chromatographic sample, which can collect sample air pressure accurately in real time and can automatically control abnormal conditions.

Description

technical field [0001] The invention belongs to a real-time monitoring system, is a chromatographic sample gas path control system aimed at the pressure change of the chromatographic sample gas path of mud logging equipment in the petroleum industry, involves the gas path interfaces of various brands of chromatographs, and automatically controls the change of the sample gas pressure. Background technique [0002] In mud logging production, due to various reasons, sample pumping mud damages the chromatogram, and gas leaks in the sample gas path occur from time to time. Distributors are equipped with vacuum gauges. However, due to the low accuracy of vacuum gauges, complete dependence on staff observation, and inability to self-control, etc., the mud pumping damages the chromatogram, leaks gas measurement data, and accidents occur frequently. Contents of the invention [0003] The object of the present invention is to provide a chromatographic sample gas path control system ...

AI Technical Summary

Problems solved by technology

[0002] In mud logging production, due to various reasons, sample pumping mud damages the chromatogram, and gas leaks in the sample gas path occur from time to time. Distributors are equipped with vacuum gauges, but due to the low accuracy of the vacuum gauges, relying entirely on the observation of the staff, and the lack of self-control, etc., the mud pumping damages the chromatogram, leaks gas measurement data, and accidents such as core leakage of the target layer still occur frequently

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