Air feed channel automatic switcher with air channel low-pressure short message warning function

Abstract

The invention relates to an air feed channel automatic switcher with an air channel low-pressure short message warning function, and belongs to the technical field of auxiliary equipment for researches in a laboratory. The air feed channel automatic switcher solves the technical problems of automatic switching and automatic warning of air channels in the laboratory. The automatic switcher is characterized in that a main air channel and a standby air channel are respectively connected with an input port of a four-way tube through a ball valve and a single-way valve, an output port of the four-way tube is connected with an air supply outlet through a pressure reducing valve, a pressure measurement port of the four-way tube is connected with the input end of a pressure switch, the output end of the pressure switch is connected with the input end of an input and output module in a short message warning unit, and the input and output module outputs digital signals for warning. The automatic switcher has the advantages that when pressure of the main air channel is lower than that of the standby air channel, the air channel is automatically switched to the standby air channel for supplying air; when pressure of the main air channel is lower than a set value of the pressure switch, the pressure switch automatically warns, and an experimenter obtains failure information in first time so as to take corresponding measures; the system structure is simple and ingenious, installation is easy to achieve, cost is low, operations are easy to carry out and people do not need to monitor the automatic switcher.

Description

technical field [0001] The invention relates to an automatic switcher for an air supply path, in particular to an automatic switcher for an air supply path with a low-voltage short message alarm function, and belongs to the technical field of laboratory research auxiliary equipment. Background technique [0002] Gases, especially nitrogen, are the basic needs of laboratories, and are widely used in biochemistry, medical research and applications, environmental analysis, food analysis, and clinical applications. Once the gas supply is insufficient or cut off, laboratory analysis instruments will not function normally. operation, which seriously affects the progress of the work. In order to avoid work stagnation caused by gas supply in the laboratory, the gas supply method usually uses a gas generator as the main gas circuit, and a steel cylinder or high-pressure gas tank as a backup gas circuit. However, once the main gas circuit breaks down or the gas supply pressure is ins...

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Problems solved by technology

However, once the main gas circuit breaks down or the gas supply pressure is insufficient, the experimenter cannot get the fault information in time. Usually, the fault information cannot be known until the gas pressure is lower than the minimum requirement of the experimental instrument and the instrument automatically shuts down for protection. In this way This expands the impact time and even the impact area of ​​the fault, and the gas path switching between the main gas path and the backup gas path can only be done manually, which increases the workload of the experimenters

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