Scope of application: It is used to evaluate the ability of vertically installed bundled wires, cables or optical cables to suppress the vertical spread of flames under specified conditions. During the usage process, it needs to be used in conjunction with a smoke dust removal tower. The entire machine is composed of several parts, including a test chamber, an air source, a steel ladder, an exhaust purification system, and an ignition source.
Compliance with standards: Complies with GB/T18380.31-2008 and IEC60332-3-10-2018 "Burning tests of cables and optical cables under Flame Conditions - Part 31: "Vertical Flame Spread Test Report for Vertically Installed bundled Wires and Cables - Test Apparatus" complies with GB/T18380.32-2008/ IEC60332-3-21:2000 "Burning Test of Cables and Optical Cables under Flame Conditions - Part 32: Vertical flame spread test for vertically installed bundled wires and cables A F/R class, GB/T18380.33-2008/ IEC60332-3-22:2000 "Burning Test of Cables and Optical Cables under Flame Conditions - Part 33: Vertical flame spread test for vertically installed bundled wires and cables - Class A, GB/T18380.35-2008/ IEC60332-3-24:2000, "Burning Test of Cables and Optical Cables under Flame Conditions - Part 35: "Vertical Flame spread Test for Vertically installed bundled Wires and Cables - Class C", GB/T18380.36-2008/ IEC60332-3-25:2000 "Burning Test of cables and optical cables under Flame Conditions - Part 36: Vertical flame spread test for vertically installed bundled wires and Cables - Class D".
Technical parameters
1. Test chamber: The experimental setup should be a self-standing box with a width of (1000±100) mm, a depth of (2000±100) mm and a height of (4000±100) mm. The rear wall and both sides of the test chamber should adopt a heat transfer coefficient of approximately 0.7W. m-2? K-1 thermal insulation, 1.5mm thick USU304 stainless steel plate, with 65mm thick thermal insulation mineral fiber 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 display air velocity and anemometer, and the gas flow rate of the air is (5000±500) L/min.
After the test is completed: If the sample is still burning one hour after the fire supply is stopped, there is an alarm device and a device to forcibly stop the burning by exposing it to rain.
3. Steel ladder type: Standard steel ladder with a width of (500±5) mm, wide steel ladder with a width of (800±10) mm. The material of the wide steel ladder is USU304 stainless round steel
4. Discharge and purification device
The upper part of the test chamber is equipped with a digital anemometer to ensure that the air flow rate is less than 8M/S, which will not affect the air flow inside the test chamber.
Smoke collection and dust washing device: Made of 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 propane gas blowtorches with a belt, along with their matching flow meters and Venturi mixers. The fire supply surface should be a flat metal plate drilled with 242 holes of a diameter of 1.32mm. The center distance of these holes is 3.2mm, and they are arranged in three rows alternately, with 81, 80 and 81 holes in each row respectively, distributed within the nominal size range of 257×4.5mm. In addition, a row of small holes are opened on each side of the flamethrower plate. These guiding holes can maintain the stable combustion of the flame. Each blowtorch should be equipped with an accurate device to control the inflow rate of propane and air. Rotameters or mass flowmeters can be adopted
2. The ignition source position: The blowtorch should be placed horizontally, (75±5) mm away from the front surface of the cable sample, (600±5) mm away from the bottom of the test chamber, and symmetrical to the axis of the steel ladder. The ignition point of the blowtorch should be located at the center between the two crossbars of the steel ladder and at least 500mm away from the lower end of the sample.
Technical parameters
The internal dimensions of the test chamber are 1,000 (W) X2,000(D) x 4,000 (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, 150mm away from the front wall.
The top exhaust space is 300(W)X1,000(D)mm.
4. Wide stainless steel ladders with dimensions of 500(W)X3,500(H), 1 piece
5. Standard stainless steel ladder dimensions: 800(W)X3,500(H), 1 piece
6. Two belt-shaped standard propane burner devices
7. Two Venturi gas mixing devices
8. The pressure gauge and pressure reducing valve device can adjust the pressure of propane and air to 0.1Mpa
9. The rotameter regulates and sets the gas flow rate
10. The box body is equipped with a steel ladder and handrails, facilitating users' inspection from the top
11. It is equipped with a ball valve for manual shut-off of the gas source
12. Automatically set the combustion test time and automatically cut off the gas source when the time is up
13. Thermocouples on the inner wall of the box can display the internal temperature of the box
14. External dimensions of the combustion chamber: 1120 (W) X2195(D)X5077 (H) mm
15. External dimensions of the control box: 1280 (W) X770(D)X1200 (H) mm
16. Power supply: AC 220V, 50/60Hz, 2A
17. Gas source: Propane, air (provided by the customer)
Smoke dust removal tower: It is mainly used for the flue gas generated during experiments. The gas discharged after being treated by the smoke dust removal tower meets environmental protection requirements.
Material: The scrubber is entirely made of PP material, with no metal components in the system, and has extremely high resistance to acids, alkalis and corrosion.
Circulating liquid layer: It can be filled with tap water or washing liquid. Washing liquid is more effective. To prevent the waste discharged from corroding the bottom of the scrubber tower.
Air layer: The waste gas that needs to be treated and is discharged during production or experiments. The air layer is connected to the air inlet to allow the waste gas to enter the air layer.
Packing layer: The packing material of the scrubber tower adopts PP material sea urchin-shaped medium hole small balls, with a multi-toothed TELLERTT shape. The surface of the packing layer has a window, which is convenient for cleaning the small balls inside the packing layer. The main function of the filling layer is to disperse the waste gas in the air layer, turning it into dispersed waste, so that the waste gas can be fully cleaned in the water spray layer.
Water spray layer: The sprinkler heads in the water spray layer adopt PP 120-degree rotating non-clogging nozzles, covering an area of up to 95%. The water spray layer has an independent viewing window for easy inspection of the working condition of the sprinkler heads.
Anti-fog layer: It can effectively filter impurities in the air and also prevent water mist crystals in the exhaust gas from corroding the inner wall of the scrubber.
Circulating pump: The circulating pump enables the liquid in the circulating liquid layer to be recycled through the sprinkler heads, thus saving water.
External dimensions: 1500(W)×1000(D)×3000(H)mm;
Power supply: AC 380V three-phase, 50/60Hz, 10A.
I. Product Description: This machine is designed and manufactured in accordance with the requirements of standards such as GB12666.5, GB18380.3, UL1685, GB18380.31-2008, and IEC 60332-3-10:2000, and is used to evaluate the ability of vertically installed bundled wires, cables or optical cables to suppress the vertical spread of flames under specified conditions.
Ii. Control System:
1. Ignition control system; 2. Collection tower and smoke device; 3. Gas flow control system; 4. Smoke concentration measurement system; 5. Temperature measurement control system; 6. Flame spread control;
Iii. Test Conditions: The external wind speed measured by the anemometer installed on the top of the test chamber should be less than 8m/s, and the temperature of the inner wall should be between 5℃ and 40℃. The inner wall thermometer was measured at the intersection of 1.5m above the bottom of the box, 50mm from one side of the wall and 1.0m from the door. The door of the test chamber should remain closed at all times during the test. Before the test, the cables or cable sections used as samples should be treated at a temperature of (23±5) ℃ for at least 16 hours, and the test chamber should be dry.
Iv. Technical Parameters
1. Working voltage: AC 220V 10%? 50HZ;
2. Power consumption: 2KW;
3. Constant temperature: (20±5) ℃
4. Air flow rate: Adjustable from 0 to 30m ³ /min;
5. Combustion gas source: Propane, liquefied petroleum gas (provided by the user);
6. Flow range: 2.2-25L/min? Flow accuracy: 0.5L/min;
7. Timing accuracy: 0 to 120 minutes can be set.
8. Anemometer measurement range: 0 to 30m/s;
9. Intelligent control, electronic ignition, and automatic timing;
10. Wind turbine anemometer
11. Gas flow control (with protective device);
12. Timing accuracy: ±0.1s;
13. Test chamber dimensions: Length × width × height (1.2×2.2×4) m;
14. Temperature measurement devices: Digital display thermometer, K-type temperature sensor;
15. Total weight: 500Kg
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