Wheelchair Seat Pad Flame Retardancy Testing Instrument Wheelchair
Backrest Fire Resistance Tester
Main application
The wheelchair seat (backrest) pad fire resistance testing
instrument is used to test the fire resistance performance of
wheelchair seat (backrest) pad materials against cigarettes and
matches.
Applicable standards
GB/T 18029-2000 Requirements and testing methods for fire
resistance of wheelchair seat (backrest) pads
Overall laboratory plan
1. The test frame should be placed in a fume hood (provided by the
user), with the control box outside the fume hood. During the
experiment, the operator operates the control box, and the test
frame conducts a combustion test in a closed environment within the
fume hood. The fume hood is connected to the ventilation duct of
the laboratory for smoke exhaust.
The ventilation system of the fume hood controls the air flow rate
in the test space to make the wind speed on the surface of the test
frame between 0.02 and 0.2 m/s, and the air flow rate can be
adjusted and controlled.
(Note: The igniter is a handheld operation igniter. The ignition
time is within 20 seconds, and the observation window of the fume
hood is opened to facilitate the ignition operation; after
ignition, the observation window is closed, and the combustion is
carried out in a closed environment. Observe the experimental
state. The entire process should maintain the air flow rate within
the required range.)
2. Constant temperature water bath box:
1) Heating tube heating.
2) The test box is equipped with heating devices, refrigeration
devices and circulating water pumps to ensure uniform temperature
of the constant temperature water bath at 20℃, with a control
accuracy of ±2℃.
3) PID temperature control regulation. Temperature setting and
measurement: digital display.
4) The water tank has a closed circulation device to mix evenly.
5) The box body has upper and lower water functions.
6) The box body is designed with full stainless steel, has
corrosion resistance, has a long service life, the test area
surface is added with insulation materials, and the insulation
effect is good. Copper tubes are laid in the water bath box.
7) The box body is equipped with power overload and short circuit
protection.
8) Power supply: 220V 50Hz.
Technical specifications
Dimensions of the stainless steel combustion tube | Outer diameter (8 ± 0.1) mm, inner diameter (6.5 ± 0.1) mm, length
(200 ± 5) mm |
Compliance with standards and additional components | Fully in accordance with GB/T 18029-2000 and ISO7176-16: 1997
requirements; equipped with a fixture bar for holding small samples |
Back frame dimensions | Length: (450 ± 2) mm; Height: (300 ± 2) mm |
Seat frame dimensions | Width: (450 ± 2) mm; Depth: (150 ± 2) mm |
Ignition time | Can be set from 0 to 99.99 seconds, with an accuracy of 0.01
seconds |
Measurement of progressive smoldering and flame combustion time | Measurable range: 0 to 1 hour; Accuracy: ± 1 second |
Gas flow meter (at 20°C) | Flow rate: (45 ± 2) mL/min; detachable for calibration; outlet
pressure adjustable |
Fuel gas | Propane; gas tank and gas provided by the user |
Time recording and display | Ignition time, progressive smoldering time, and flame combustion
time are automatically recorded and displayed digitally |
Gas flow control system | Flow rate of combustible gas flowing towards the ignition source of
the gas flame and outlet pressure can be adjusted |
Gas leakage alarm device | The instrument is equipped with a gas leakage alarm device |
Constant temperature water bath box | Equipped with inlet and outlet air ports connected to external gas
pipes; interior with coiled copper tube; temperature settable and
adjustable; temperature calibration device at the outlet;
connecting hose between flow meter and combustion tube: 2.0 - 3
meters long, inner diameter (7 ± 1) mm; water bath temperature
controlled at (20 ± 2) °C |
Laboratory temperature requirement | Required to be balanced at (20 ± 2) °C |
Burning droplets collection tray | The equipment is equipped with a collection tray for burning
droplets, convenient for cleaning |
User-provided items | Masks, goggles, work clothes, etc. (to be provided by users) |
Working power supply | AC 220V, 50Hz |
