Composition of Cable Combustion Testing Machine

Maintenance and Precautions for Suzhou Cable Load Combustion Testing Machine

1. Before the experiment, first connect the pressure regulating valve for the liquefied petroleum gas tank hose, then connect the signal control line, turn on the power switch of the control box, check that the connection is correct, and pay attention to whether there is any air leakage. If there is no air leakage, the power switch can be turned on. Open the main valve of the gas cylinder, turn on the pressure regulating valve switch, and the pressure indicated by the high-pressure gauge of the gas pressure reducing valve should be between 0.01~0.02Mpa (this is the working pressure of the gas outlet). If it exceeds 0.02Mpa, there may be danger and gas leakage.

2. After the experiment is completed, the power switch and the main valve of the gas cylinder should be turned off to confirm that there are no combustibles igniting before leaving the site.

Cable load combustion testing machineScope of application: According toMT386-1995Design and manufacture according to the corresponding requirements of coal industry standards, applicable toMT818-2009 Flame retardancy test for flame-retardant cables and flame-retardant cable joints used in coal mines.

Cable load combustion testing machineTechnical Specifications:

1.Combustion box size:L1100*W525*H900mmThe volume of the test chamber is ≥0.5 m3

2.Electric control box size:L1100*W525*H400mm

3.Load current:10～3000AContinuously adjustable.

4.Burning spray lamp:Hamburg, United States.Flame nozzle diameter: ￠0.90±0.03mmLength of nozzle lamp:1.60±0.05mmThe height from the nozzle to the air inlet is102mmInner diameter of flame tube ￠9.5mm.

Spray nozzle angle: vertical90°(The longitudinal axis remains in a vertical plane and is perpendicular to the vertical direction)90°Angle), intake from air, internal flame70～80mmThe outer flame115～135mmAdjustable.

5.Temperature measurement system: importedKType thermocouple, equipped with1.0mmStainless steel pipes with a diameter are used as jackets. intelligencePIDTemperature control meter andKType matching thermocouple. Its reading0~999.9℃

6.Operating System:Automatically record combustion time and duration of combustion.

Combustion timing: When the sample temperature reaches the specified temperature204℃At this time, the combustion torch moves to the lower surface of the sample and begins to burn. Automatically record combustion time (set according to regulations: such as combustion)1min）When the set time is reached, the blowtorch returns to its original position.

Holding timer: When the above combustion timer is reached, this timer automatically counts; If the fire supply is stopped within the specified time (e.g4min）During this process, if the flame of the burned sample goes out, the operator will press the ignition stop button to stop the timer and record the time. If it is within the specified time range, the sample will be judged to have passed this inspection.

7Box material: The chassis is processed and formed by CNC machine tools, with a beautiful and elegant circular arc shape.premiumSUS304Stainless materials have the characteristics of beauty, rust prevention, and corrosion resistance.

8.Timer:0~99.99 S/m/h.

9.Ignition method: High voltage electronic ignition, convenient and stable.

10.Working voltage: power10KW, AC 220V /50HZOne (to be provided by the customer)63ALeakage protection switch

Maintenance and Precautions for Suzhou Cable Load Combustion Testing Machine

Cable load combustion testing machinePanel button description:

1. Power switch: The power supply is AC220V 50HZ. Connect the power cord to the power supply, turn on the power switch, and the instrument will start;

2. Power indicator: Turn on the power switch, the power index light will turn on;

3. Current display: Real time display of the current value applied to the test. When adjusting the voltage regulator, the current will change accordingly.

4. Exhaust: After the test is completed, turn off the gas and press the "exhaust" button again to eliminate any harmful gases that may be generated inside the test chamber, and then turn off the power.

5. Ignite: Click the "Ignite" button to ignite and ignite the blowtorch.

6. Stop: Click the "Stop" button to turn off the blowtorch.

7. Start: Set the combustion time according to the standard requirements, press the "Start" button, apply current to the sample, and adjust the current required for the sample test (the regulator is located on the right side of the combustion chamber), and wait for the test.

8. Reset: Press the "Reset" button to disconnect the power supply applied to the sample and stop the current loading.

9. Flame regulation: Control the gas flow rate to adjust the flame size. When starting to adjust, please rotate to the small position, then slightly rotate in the direction of increasing, light the blowtorch, observe the flame height and adjust it to the standard required height (if the flame is yellow flame, please adjust the small disc at the bottom of the blowtorch until the flame turns blue flame).

10. Temperature display: During the process of powering on the sample, observe the temperature changes on the sample.

11. Combustion timer: Set the combustion time, and when the blowtorch reaches the bottom of the sample, the combustion timer will start counting. When the combustion time is up, it will automatically jump to the continuation time timer, and the continuation time timer will start counting.

12. Combustion indicator: During the flame application process of the blowtorch, the combustion indicator light is on.

13. Continuation timer: When the flame combustion time is up, it will directly jump to the continuation timer, and the continuation timer will start counting.

14. Continuation pause: Press the "Continuation pause" button, and the timer on the continuation timer will freeze at the current moment.

Cable load combustion testing machineThe main components of the equipment are:

Mainly composed of an electrical control box and a combustion test box (matched with the test box)It consists of a combustion torch, solenoid valve, high-pressure igniter, sample fixture, gas pipe, gas source, internal and external flame adjustment device, signal control line, etc.

The electrical control box and combustion test box are integrated machines, with the electrical control box located at the bottom and the combustion test box located at the top, made of stainless steel plate;

Electric control box: equipped with power source and thermometer, capable of outputting50HzRated current of the tested component5Apply a current of more than twice the current to the cable specimen, and measure the temperature of the power core conductor through the thermocouple installed on the specimen. The measuring range of the thermometer is0～300℃, with an accuracy of1Grade.

Combustion box: The combustion box is placed under the exhaust hood or equipped with an exhaust fan. Two sets of metal brackets supporting cable specimens and a standard methane spray lamp are installed inside the box.

The combustion time is controlled by a time controller, and the working time can be set as needed, with units ofS(second)TheM(divide)TheH(hour); such as setting00S01for0.01In seconds,15S00for15In seconds,10M00for10minute It can also be used to manually control the combustion time.

⑵ The power switch is the overall power switch of the control box.

⑶ Flame regulation: Control the gas flow rate to adjust the flame size.

Cable load combustion testing machineTechnical performance of equipment

Continued combustion: After the flame of the blowtorch leaves the specimen, the specimen itself continues to burn with or without flameTest method: Combustion test method under load conditions

Preparation of test piece: Cut a length of from the test piece1.8mThe cable is used as a test piece, and the number of test pieces is3If it is a cable joint specimen, the joint should be located in the middle of the entire specimen.

Regardless of whether other wire cores (such as signal wire cores, etc.) are included in the sample, as a test piece, only the two ends of each power wire core should be stripped off6cmLong insulation.

Install a copper connector for connecting to the power supply at the end of the stripped power wire core.

At a distance from the centerline of the specimen20cmOn one side, use a small knife to cut open the protective cover and insulation layer of the test piece, exposing a power wire core conductor. Insert the temperature measuring head of the thermocouple into it, so that the temperature measuring head can make good contact with the power wire core conductor. Then cover the insulation, protective cover and other layers, and tie the cut tightly with a thin iron wire.