Mask dead cavity detector

First, overview

The device is designed and manufactured according to standard GA124 and GB2890 to test the dead cavity test of positive pressure fire air respirator. The test principle is determined by measuring the CO2 content in the inhaled gas.

Ii. Applicable standards

GA124-2013 "6.1313 Fire Air Breaator"

GB2890-2009 clause 6.7 Mask dead Test Test

GB 21976.7-2012 building fire escape shelter equipment-Part 7: Filter fire self-rescue breathing apparatus

Iii. Technical indicators

1. Working environment: the concentration of CO2 gas in the surrounding air is 0.1%

2. Carbon dioxide gas source: the volume fraction of CO2 gas (5 ± 0.1)%

3. CO2 flowmeter: flow range: 0-50L / min, accuracy: level 2.5.

4. Equipped with CO2 analyzer: 0~12%, precision level 1; CO2 sensor is British brand.

5. Equipped with CO2 analyzer: 0~5%, precision level 1; CO2 sensor is British brand.

6. Equipped with handheld anemometer, range: 0 ~ 10 m/s, accuracy: ± (0.1 m/s + 5% measurement value) measurement range (0 ~ 2 m/s), the anemometer should be selected German brand.

7. Equipped with a French electric fan.

8. The adjustment range of artificial lung respiratory rate is (10~40) times / min, and the range of respiratory tidal rate adjustment is (0.5~3.0) L.

9. The instrument is operated by computer, and the Detection control program and ZWH4500 acquisition control card can realize the program control, data collection, test result calculation and printing report, data storage and historical data query.

10. Total power supply: AC220V, power: 500W.

Four, structure principle

The main components of the test device include: test head mold, mechanical artificial lung with solenoid valve, connecting pipe, flowmeter, CO2 gas analyzer and control system.

The test device is driven by the low-speed motor of the detection device through the control system to drive the artificial lung to reciprocate motion, to simulate the actual human breathing process.The push journey is equivalent to inspiration, and the return journey is equivalent to exhalation.For the upper head mold of the cabinet, these two processes complete a breathing process.A certain amount of high concentration of CO2 was injected while inhaling, and the whole breathing process was detected by using a CO2 gas analyzer.

V. Equipment characteristics

1. The test device is composed of test head mold, mechanical artificial lung with solenoid valve, connecting pipe, flowmeter, CO2 gas analyzer and control system.

2. The reciprocated piston motion structure driven by artificial lung servo motor, with high accuracy of respiratory rate and respiratory tidal volume regulation.

3. Automatic computer control, automatic generation of test report.Print the report.

4. The instrument is operated by computer, and Detection control program and ZWH4500 acquisition control card can realize program control, data collection, test result calculation and printing report, data storage and historical data query.The procedure is completely in accordance with the standards, good repetitive.