Heat resistance test device for semi-rigid and corrugated casing

  Semi hard casing and corrugated casing heat resistance test device Casing heat resistance test device I
Introduction to heat resistance test device for semi-rigid casing and corrugated casing
The semi-rigid casing and corrugated casing heat-resistant test device is applicable to the heat-resistant test of various plastic pipes and plastic corrugated pipes to determine the required heat-resistant value of the pipe, so as to determine its heat-resistant strength, which meets the requirements of GB / t14823 2 conduit for electrical installation special requirements & mdash; rigid insulating material flat conduit, jg3050 insulating electrical bushing and accessories for building, zbg33008 PVC plastic corrugated wire pipe and other requirements

2、 Technical parameters of heat resistance test device for semi-rigid casing and corrugated casing:
Overall dimension: 19
5cm & times; 10cm× 24cm
Host weight: 5
26kg
1# weight: 1kg
2# weight: 2kg
Total weight: 2
886kg
3、 Determination method of heat resistance test device for semi-rigid casing and corrugated casing
1
Take three 80mm long casing pipes for hard casing pipes and accessories, cut them into two pieces along the axial direction of the casing pipe, and take one of them as a sample
Accessories can be made from accessories according to specific conditions
Put the sample together with the jg3050 heat-resistant tester for insulating electrical sleeves and accessories for buildings at a temperature of 60 ℃ & plusmn; In the oven at 2 ℃, the sample is placed on the flat plate of the heat-resistant instrument, and the cone with a steel ball with a diameter of 5 mm at the lower end is placed on the sample at 20 N keep it for 1H under the pressure (for the casing, it should be pressed at its concave surface), take out the sample after reaching the specified time, and measure the indentation diameter d with vernier caliper after cooling at room temperature, which should not be greater than 2mm

2
Take three 100mm long samples from the semi-rigid casing and corrugated casing, put the samples together with the heat-resistant tester into the oven, and the temperature in the oven is controlled as follows:
— Type 5, & mdash; Type 15, & mdash; 25 type casing, oven temperature 60 ℃ ± 2℃； Type 90, 90 / & mdash; 25 type casing, oven temperature 90 '℃ & plusmn; 2℃。
 
  Table 7 heat resistance test load

casing type	Load	casing type	Load
lightweight	1 0	heavy duty	2 0

 
3
The sample and the heat-resistant instrument shall be kept in the oven for 4h, and then the sample shall be placed on the heat-resistant instrument
A steel rod with a diameter of 6 mm shall be placed on the sample, and the axis of the steel rod shall be orthogonal to the axis of the casing
The load specified in table 7 shall be applied to the sample through the steel rod

4
The sample shall be kept for 24 hours after being loaded, and then the sample shall be cooled to room temperature under the action of maintaining the load, the load shall be removed, the sample shall be erected immediately, and the corresponding gauge shall be selected
It is required that the gauge can slide freely from the casing under its own weight

5
Heat resistance test load
Casing type: light, load 1
0;
Casing type: heavy duty, load 2
0
 
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