company news about The wire and cable bunching combustion tester is being produced at an accelerated pace

Last week, a well-known enterprise in Guangdong ordered a customized wire and cable bunching combustion testing machine from our company, and our company quickly began to prepare, and it is now close to the completion stage.

DX8349 Wire and cable bundle combustion testing machine

Application scope: Used to evaluate the ability of vertically installed bundled wires, cables, or optical cables to suppress vertical flame propagation under specified conditions, with the need to cooperate with smoke and dust removal towers during use. The whole machine consists of several parts, including a test chamber, air source, steel ladder, emission purification system, ignition source, etc.

Compliant with standards: in accordance with GB/T18380.31-2008 and IEC60332-3-10-2018 "Fire tests for cables and optical cables under flame conditions - Part 31: Test apparatus for vertical installation of bunched wire and cable flame vertical spread test report", and can meet GB/T18380.32-2008/IEC60332-3-21:21:2000 "Fire tests for cables and optical cables under flame conditions - Part 32: Vertical installation of bunched wire and cable flame vertical spread test A F/R class" GB/T18380.33-2008/IEC 60332-3-22:2000 "Fire tests for cables and optical cables under flame conditions - Part 33: Vertical flame propagation test for vertically installed bundled wires and cables - Class A", GB/T18380.35-2008/IEC 60332-3-24:2000 "Fire tests for cables and optical cables under flame conditions - Part 35: Vertical flame propagation test for vertically installed bundled wires and cables - Class C" GB/T18380.36-2008/IEC60332-3-25:2000 "Fire tests for cables and optical cables under flame conditions - Part 36: Flame spread test for vertically installed bundled wires and cables - Class D".

Technical parameters:

1. Test box: The experimental device should be a self-supporting box with a width of (1000± 100) mm, a depth of (2000±100) mm, and a height of (4000±100) mm. The back wall and both sides of the test chamber should have a heat transfer coefficient of approximately 0.7W? M-2? K-1 thermal insulation, 1.5mm thick USU304 stainless steel plate, 65mm thick insulation mineral fiber wrapped in the middle, and 1.5mm thick USU304 stainless steel plate on the outside

2. Air source:

The air inlet is equipped with a digital air velocity anemometer, and the gas flow rate of the air is (5000±500) L/min.

After the experiment is completed: If the sample is still burning after stopping the fire for one hour, there is an alarm and a device that uses rain to forcibly stop the combustion.

3. Steel ladder type: width (500±5) mm, standard steel ladder width (800±10) mm, wide steel ladder material is USU304 stainless round steel

4. Emission purification device:

The upper part of the test box is equipped with a digital anemometer to ensure that the wind speed is less than 8M/S and will not affect the air flow inside the test box.

Smoke collection and washing smoke and dust device: SUS304 stainless steel, with a diameter of 800mm and a height of 3500mm.

Ignition source

1. Type: The ignition source should include one or two belt type propane gas nozzles and their accompanying flow meters and Venturi mixers. The fire supply surface should be a flat metal plate drilled with 242 holes with a diameter of 1.32mm, with a center distance of 3.2mm. These holes are arranged in three staggered rows, with 81, 80, and 81 in each row, distributed in a nominal size of within a range of 257×4.5mm. In addition, a row of small holes are opened on both sides of the flamethrower, which can maintain stable combustion of the flame. Each spray lamp should be equipped with accurate devices to control the flow rate of propane and air. Rotary flow meter or mass flow meter can be used

2. The ignition source position nozzle should be placed horizontally, (75±5)mm away from the front surface of the cable specimen, (600±5)mm away from the bottom of the test box, and symmetrical with the axis of the steel ladder. The ignition point of the spray lamp should be located at the center between the two horizontal bars of the steel ladder, and at least 500mm away from the lower end of the sample.

Technical parameters:

1. The size inside the test box is 1000 (W) X2000 (D) X4000 (H) mm, with a mineral wool material box filled in the middle

2. There is an air intake space of 800 (W) X400 (D) mm at the bottom of the box, which is 150 mm away from the front wall

3. The top exhaust space is 300 (W) X1000 (D) mm

4. Wide stainless steel ladder size 500 (W) X3500 (H), 1 piece

5. Standard stainless steel ladder size 800 (W) X3500 (H), 1 piece

6. Two strip standard propane burner devices

7. Two Venturi gas mixing devices

8. Pressure gauge and pressure reducing valve device, capable of adjusting propane and air pressure to 0.1Mpa

9. Adjusting and setting the gas flow rate using a rotary flowmeter

10. The box provides steel ladders and railings for users to inspect at the top

11. Equipped with a ball valve that can manually shut off the air source

12. Automatically set the combustion test time and automatically cut off the gas source at that time

13. The thermocouple on the inner wall of the box can display the temperature inside the box

14. External dimensions of combustion chamber: 1120 (W) X2195 (D) X5077 (H) mm

15. External dimensions of control box: 1280 (W) X770 (D) X1200 (H) mm

16. Power supply: AC 220V, 50/60Hz, 2A

17. Gas source: propane, air (customer self provided)