Gas detector hydrophobic filtering device with remote calibration function

Abstract

The invention discloses a gas detector hydrophobic filtering device with a remote calibration function, which comprises a shell, a sliding plate, a fixed plate and a guide pillar plate, and is characterized in that the shell is formed by butting two semi-cylindrical curved surface structures; the hydrophobic filtering device of the gas detector is of a central symmetry structure; a sliding plate is arranged on the inner side of the shell; a pressure spring is arranged between the sliding plate and the shell; a guide pillar plate is arranged on the outer side of the shell, and two guide pillars of the guide pillar plate penetrate through the shell and are in butt joint with two guide pillars of the guide pillar plate on the other side through screws. A fixed plate is arranged in the shell, and two guide columns on the fixed plate penetrate through the sliding plate and are communicated with a pipeline of the guide column plate; the outer side of the guide column plate is connected with a calibration connector. The device not only can effectively block external dust and rainwater and can be directly used for calibration, but also can realize a remote automatic calibration function by virtue of a built-in air cylinder structure system, so that the working efficiency is remarkably improved, and the field operation safety is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of gas detector accessories, in particular to a hydrophobic filter device for a gas detector with a remote calibration function. Background technique [0002] Industrial infrared gas detectors use the principle of infrared optics to detect gas concentrations, and are generally installed in outdoor open-air environments. Since the accumulation of dust and rainwater will block the optical path or pollute the window, which will affect the detection of gas concentration, the detector will be equipped with a hydrophobic filter device (also known as a dustproof and rainproof cover) for a certain degree of dustproof and waterproof. At the same time, it has its own breathing structure so as not to affect the monitoring of normal gas exchange. [0003] Most of these hydrophobic filter devices are not equipped with calibration joints. When calibration is required, they must be disassembled and replaced with special c...

AI Technical Summary

Problems solved by technology

[0004] Even if a small amount of hydrophobic filter devices have their own calibration connectors, accurate calibration cannot be achieved, because the breathing structure of the device will cause continuous gas exchange between the inside and the outside world, and the internal gas concentration cannot accumulate to reach the target value of the calibration gas, resulting in a large loss of calibration signals. making it impossible to accurately calibrate

[0005] In addition, many on-site gas detectors are installed in areas high from the ground, and these areas are dangerous places, which makes the ventilation calibration work on site for maintenance personnel more dangerous and complicated

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