Method and device for online batch calibration of fixedly-mounted combustible gas alarms

Abstract

The invention discloses a method and a device for online batch calibration of fixedly-mounted combustible gas alarms. The device comprises a server and a gas delivery pipe with a plurality of gas holes, check valves are mounted at the gas holes respectively, and an outlet of each check valve is communicated with the interior of an exhaust hood through a flow regulator. The gas delivery pipe is communicated with a vacuum pump connection port, a gas flow meter and an air compressor connection port through a four-way selector valve, and the gas flow meter is connected with a gas source connection port. The gas delivery pipe is in cascade connection with all to-be-calibrated combustible gas alarms, and the server is in signal connection with the to-be-calibrated combustible gas alarms. The method includes: adopting three standard gases for calibration of the to-be-calibrated combustible gas alarms; calculating reaction time and average measurement errors according to data generated by the combustible gas alarms; judging whether each alarm is qualified or not according to combustible gas alarm calibration rules and evaluation standards, and determining which one is abnormal in operation. By the calibration device, efficiency in repairing and maintenance of the alarms mounted in batch is greatly improved.

Description

technical field [0001] The invention belongs to the field of detection of instruments and equipment, and relates to an online batch verification device for flammable gas alarms which is mainly used for fixed installation in coal mine lanes and oil tank caverns. device method. Background technique [0002] Due to the limitations of the surrounding space in places such as coal mine shafts and oil tank caverns, the air circulation is blocked. Facing the leakage of flammable gases, it is easy to cause fire and explosion hazards, which will bring immeasurable losses of life and property. Therefore, strengthening the timely monitoring and alarming of the concentration of flammable gases is an important means to prevent fires and explosions in oil depots, coal mines and deep alleys, as well as personnel suffocation and poisoning accidents. Flammable gas alarms are widely used in these places. [0003] However, with the passage of time, the detection performance of the combustible...

AI Technical Summary

Problems solved by technology

At present, the commonly used method is to manually carry detection equipment on-site inspection one by one, but in the face of a large number of installed alarms, this method of on-the-spot inspection one by one requires a lot of work and requires a lot of financial and material resources. The most important thing is to face Relatively harsh or unsuitable environments for on-site work increase the difficulty and workload of maintenance

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