Universal calibrator of oxygen breathing apparatus

Abstract

The invention relates to a calibrating device of an oxygen breathing apparatus for emergency and disaster releasing in coal industry and the like, in particular to a universal calibrator of the oxygen breathing apparatus. The calibrator of the oxygen breathing apparatus comprises a box body, wherein a box cover is hinged on the side part of the box body; a panel is arranged in the box body; and a groove is formed in the right side of the panel in the box body. The calibrator is characterized in that: a manual air pump and an oxygen pressure meter which is provided with a connector of an oxygen cylinder are arranged in the groove; a digital pressure meter displayer, an electronic gas flow meter displayer, an electronic timer, a power supply switch, a charging indicating lamp, a zero potentiometer, a closing valve pull rod and a switching valve pull rod are arranged on the surface of the panel; an air outlet two-way pipe and an air inlet two-way pipe pass through the surface of the panel; the air outlet two-way pipe is sequentially connected with a switching valve and a tee pipe which are arranged on the lower part of the panel; the air inlet two-way pipe is connected with the tee pipe on the lower part of the panel; and the other end of the tee pipe is connected with a digital pressure sensor through a pipe. The calibrator is simple in structure and is convenient to operate.

Description

(1) Technical field [0001] The invention relates to a calibrating device for an oxygen respirator used in emergency rescue and disaster relief in coal and other industries, in particular to a general-purpose oxygen respirator calibrator. (2) Background technology [0002] Oxygen respirator is a kind of respiratory protective equipment that must be worn and used by military mine rescue teams in the coal mine industry and other industries when they are engaged in rescue and disaster relief work. Oxygen respirators must be inspected, maintained and calibrated regularly during the use of the equipment. It can be guaranteed that it is always in good combat readiness. At present, although there are many types of oxygen respirators equipped by domestic militarized mine rescue teams, their routine calibration items are basically the same. For any type of oxygen respirator, there are low-pressure airtightness checks, inspiratory valves and More than a dozen routine inspectio...

AI Technical Summary

Problems solved by technology

According to common sense, since the calibration items are basically the same, the oxygen breathing apparatus calibrator produced by each manufacturer should also be interchangeable, but not always, the current basic situation is which production line is used by each mine rescue team The manufacturer's oxygen respirator must be matched with the manufacturer's oxygen respirator calibrator. That is to say, the existing oxygen respirator calibrator is a special type. Inconsistent methods and many other reasons lead to the fact that the oxygen respirator calibrator can only be used for special purposes and cannot be used universally.

In addition to not being universal, the existing oxygen respirator calibrator also has the following shortcomings or deficiencies in the following four aspects. First, the water column manometer is used as the pressure measurement unit in the existing domestic calibrator. Second, the existing calibrator The overall technology of the instrument is backward, resulting in cumbersome and complicated calibration operations; 3. The measurement unit used by the imported calibrator is a non-statutory unit of measurement stipulated by the Metrology Law of my country, and there are low measurement and detection accuracy, and the value cannot be traced; 4. The sales price of calibrator products is generally high, especially the price of some imported calibrator is very high

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