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What are the preparations for the vertical combustion tester

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What are the preparations for the vertical combustion tester

Author: Date :2018-04-28 Views: order
Test equipment and apparatus.
 
1. Specimen holder.
  The sample fixing frame should be a rectangular frame, as shown in figure 1. The frame is 560 mm high, with two parallel bars spaced 150 mm apart.
  A fixed needle with a fixed sample on the rod. The diameter of the fixed needle should be no more than 2 mm, and the length is at least 27 mm. Install the sample mounting bracket.
  On the corresponding support in the fume hood, the fixed frame is always in a vertical state during the test.
In order to fix the sample to the fixed needle, and have a distance from the frame, the installation diameter of the fixed needle should be 2 mm, and the height should be at least 20 mm positioning column.
What are the preparations for the vertical combustion tester(图1)
2, pressure plate,
Use the u-shaped platen to ensure the vertical leveling of the sample on the specimen holder. The u-shaped pressing plate shall be flat and rigid and shall be made of suitable materials.
The size of the specimen is equivalent to the size of the specimen and the thickness is 1.0mm + 0.1mm. The diameter of the left and right sides of the pressure plate is about 4 mm、12 round holes, the position of the round hole should ensure that the center spacing is equal to the distance between the fixed pin of the sample holder .
3. Gas lamp
Gas lamps provide test ignition sources, and their descriptions and structures are subject to appendix A.
4, gas
Gas lamps are used for industrial use of propane gas, butane gas or liquefied petroleum gas.
5. Marking line
White mercerized cotton thread with a maximum linear density of 50 Tex.
6, a stopwatch
The measuring time is not less than 0.5 s with a stopwatch.
7. Steel plate ruler
The steel plate ruler is over 600 mm and the accuracy is 1 mm.
8. Fume hood
Sample fixed frame should be in the fume hood, fume hood interior volume for 20 times to 110 times the size of sample fixed frame, and fume hood length, width and height of any size must not more than the other two dimensions
It's twice the size. Before the test, the vertical velocity of the air flowing through the fume chamber was measured at 100 mm before and after the final location of the sample fixed frame. The speed should be 0.10 m/s ~ 0.30m /s.
In between. The fume hood can be ventilated with natural ventilation or appropriate wind speed.
 
 
The sample
1, size
The sample size is 560 mm, plus or minus 2 mm, with a width of 170 mm plus or minus 2 mm, and thickness is the part thickness.
2, sampling
The combustion test was carried out on three (or more) samples, respectively. The sampling method is as follows:
A) if the shape and size of the parts conform to the sampling requirements, the sample should be cut from the parts.
B) if the shape and size of the parts do not conform to the sampling requirements, the standard samples of the same materials can be made with the same process, and the structure is consistent with the parts.
Experiment.
C) when the material is supplied at the whole width, the material should be cut off 100 mm from the edge, and then evenly sampled in the remaining part.
3. Pretreatment
Specimens under temperature of 23 ℃ + 2 ℃, relative humidity of 50% plus or minus 5% of standard condition place for at least 24 h, until they began to test.
 

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