Quick detection method for poor-quality halogen-free flame-retardant wires/cables
A wire and cable and detection method technology, which is applied in the field of cable or optical cable detection, can solve the problems of great harm to experimental operators, shortened equipment life, and increased measurement cycles, so as to save detection costs, reduce energy consumption, and ensure safety in use Effect
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Embodiment 1
[0031] A rapid detection method for inferior halogen-free flame-retardant wires and cables, the specific steps are as follows.
[0032] (1) Prepare the sample and check the test device
[0033] ①Preparation of samples
[0034] Take the cable insulation layer sample of model WDZBN-YJY23-0.6 / 1kV-3×70+2×35, first wipe the sample with a clean towel to remove the surface stains; then crush it and pass it through an 80-mesh sieve , Collect the sieved small fragments, that is, the prepared sample to be tested, and set aside; when taking the sample, do not introduce the wire powder in the wire or cable into the sample, so as not to affect the experimental results.
[0035] ② Check the test device
[0036] After step (1)-① is completed, first check the integrity of the test device, and focus on the activity of the activated carbon in the air filter of the device and the color of the silica gel adsorbent in the air dryer. In the case that the activated carbon has not lost its activit...
Embodiment 2
[0048] A rapid detection method for inferior halogen-free flame-retardant wires and cables, the same as in Example 1, wherein:
[0049] In step (1)-①, take a sample of the cable insulation layer of model WDZC-BYJ-2.5, then crush it and pass it through a 60-mesh sieve;
[0050] In the step (1)-②, the compressed air with a flow rate of 272ml / min is introduced, and the PH of 420 is 5 and the conductivity is 0.1μS / min. mm of distilled or soft water;
[0051] In step (2), weigh 995 mg of the sample prepared in step (1), and when the temperature of the device reaches 350°C, quickly send the combustion boat containing the sample into the device and start timing And constant temperature 15 ~ 25min. The calculated PH weighted value is 4.48, and the calculated conductivity weighted value is 0.750μS / mm;
[0052] In the (3) step, the converted PH weighted value Y1=4.72>4.3 and the converted conductivity weighted value Y2=0.471<10μS / mm (the value is based on the judgment of the national...
Embodiment 3
[0054] A rapid detection method for inferior halogen-free flame-retardant wires and cables, the same as in Example 1, wherein:
[0055] In step (1)-①, take a cable sheath sample of model WDZC-YJLY23-0.6 / 1kV-5×150, then crush it and pass it through a 100-mesh sieve;
[0056] In step (1)-②, the compressed air with a flow rate of 332ml / min is introduced, and 480 PH of 5 and conductivity of 0.6μS / mm of distilled or soft water;
[0057] In step (2), weigh 1005 mg of the sample prepared in step (1), and when the temperature of the device reaches 450°C, quickly send the combustion boat containing the sample into the device and start timing And constant temperature 25min. The calculated PH weighted value is 4.42, and the calculated conductivity weighted value is 0.692μS / mm;
[0058] In the (3) step, the converted PH weighted value Y1=5.70>4.3 and the converted conductivity weighted value Y2=0.512<10 μS / mm (the value is based on the judgment of the national standard GB / T 17650.2-19...
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