Steel Structure Fireproof Coating Testing Furnace for Fire Resistance Test Of Steel Structure Fireproof Coatings

DX8810A Steel structure fireproof coating test furnace

1. Project name: steel structure fireproof coating test furnace
2. Overview: The steel structure fireproof coating test furnace is suitable for the fire resistance test of various steel structure fireproof coating samples used indoors and outdoors in buildings (structures), and is not suitable for samples with a length greater than 800cm. Using the WINDOWS 7 operation interface and the development software LabView, the interface style is fresh, beautiful and simple. The measurement results are displayed in real time during the test and the perfect curve is drawn dynamically, and the data can be permanently saved, retrieved and printed, and the report can be printed directly. It has the characteristics of highly intelligent, guided menu operation, simple and intuitive, and makes the test results more accurate.
3. Comply with the standard: GB/T9978.1-2008 "Fire Resistance Test Methods for Building Components Part 1: General Requirements".
Chapter and Chapter 6 requirements, GB/T14907-2018 "Steel Structure Fire Retardant Coatings" test standards, GBJ17-2003 "Steel Structure Design Code" standard requirements, GA_T714-2007, GB/T9779-1988 multilayer architectural coatings

Technical parameters:
1. Equipment composition: fire resistance test horizontal furnace, combustion control part, gas part and pressure reducing system, pressure release and pressure measurement system, flue gas emission system, sample test frame, gas flow system, temperature measurement system (furnace temperature data acquisition system, test component temperature acquisition system), smoke exhaust valve system and special test software. The 16-bit high-precision data acquisition module is used to collect the data of temperature, pressure, flow rate and other aspects of each channel, and the real information of combustion reproduced in real time is generated through microcomputer analysis, processing and control, and the results are directly obtained by microcomputer analysis and judgment. The whole machine adopts high-quality components to ensure that the system is of high quality, high-speed operation and advanced.
2. Furnace structure: four-layer structure, when the inner layer is 1300°C, the outer layer is room temperature. From the outside to the inside, they are: the first layer of stainless steel shell, the second layer of steel structure frame; the third layer is made of high-temperature bricks; The fourth layer is a high-temperature ceramic cotton with a temperature resistance of 1700 °C;
3. Burner:
3.1 2 sets of high-pressure burners with a power of 60~80kw are adopted, and the burner has air-fuel proportional control, which forms a closed-loop control with the temperature feedback in the furnace, and can automatically adjust the gas valve and air valve to achieve the best combustion effect. In order to ensure safety, the selection of burners and components are all well-known brands;
3.2 Burning torch controller: with automatic alarm device for ignition failure and flame extinguishment;
3.3 There are 2 high-speed gas muskets embedded on both sides of the furnace wall, 1 on each side. Provide the heat needed to heat up in the furnace;
3.4 Gas pipeline and air pipeline: It is composed of butterfly valve, air-fuel proportional valve, two-stage pressure reducing valve, manual butterfly valve, ignition controller, high and low pressure switch, gas overpressure release valve, gas gas-liquid separator, first-stage pressure reducing valve, liquid phase switching valve, gas pressure gauge, low pressure gauge, ball valve, gas leakage alarm, stainless steel hose, gas high-pressure hose, etc.
4. Temperature measurement system:

4.1 Thermocouple in the furnace:
THE FURNACE ADOPTS A WIRE DIAMETER OF 2.0MM THAT MEETS THE REQUIREMENTS OF 5.5.1.1 IN GB/T9978.1 AND GB/T 16839.1
4 K-type nickel-chromium-nickel-silicon thermocouples, heat-resistant stainless steel sleeve cover, heat-resistant material filled in the middle, stainless steel pipe jacket rigid
The length of the jade tube sheath is not less than 25mm at the hot end of the casing, and the temperature resistance is more than 1250 °C; Thermocouples from the side of the furnace wall Penetration, the installation position is more than 300mm away from the furnace wall
4.2 Backfire surface temperature measurement:There are 8 thermocouples on the back of the sample, of which 4 are copper thermocouples (using a thermocouple wire with a wire diameter of 0.5 mm are welded in thickness 0.2mm, 12mm diameter on a round copper sheet), in line with the standard GB/T 16839.1 specified in the K-type nickel-chromium-nickel-silicon thermocouple requirements,Each copper sheet is equipped with 30*30*2 (±0.5)mm asbestos insulation pad, and the density of the insulation pad is 900kg/m3±100 kg/m3
The thermal coefficient is 0.117~0.143W/(m.k)
4.3 Mobile test temperature: in line with the requirements of GB/T9978.1-2008, 1 handheld infrared measuring instrument is used to measure the surface temperature of each point of the backfire surface;
4.4 Furnace temperature collection: K-type armored thermocouple is selected. High temperature resistance above 1250°C; The furnace temperature data acquisition system has the functions of real-time curve and historical curve storage, thermocouple circuit opening and short circuit alarm functions.
5. Pressure measurement system:
5.1 Furnace pressure measurement: measurement range 0-100Pa; The differential pressure gauge imported from France is a T-shaped measuring probe with a measuring ± 0.5Pa. It has the function of overpressure protection, the pressure in the furnace is higher than 100Pa, the overpressure protection is executed, the gas supply is stopped, and the test is terminated; Comply with GB/T9978.1-2008 standard;
5.2 The pressure in the furnace is recorded every 1 min, and the accuracy of the recording equipment is 1 s. Data acquisition is 3 times/second. Furnace pressure control and data acquisition, furnace pressure can ensure real-time control with the smoke exhaust system according to the requirements of each standard of "Chapter 2 Compliance with Standards";
5.3 T-shaped measuring probe: using SUS310S high-temperature resistant stainless steel tube, from the furnace through the furnace wall to the furnace outside, the pressure in the furnace and outside the furnace to maintain the same horizontal height;
5.4 Pressure transmitter: French Kaimao high-precision pressure sensor. The test was 15 Pa ± 5 Pa within 5 minutes and 17 Pa ± 3 Pa 10 minutes later.

6. Pressure release system:
6.1 Smoke exhaust holes are installed on the furnace wall behind the furnace wall, which are connected to the smoke exhaust pipe to discharge the flue gas in the furnace body and control the pressure in the furnace. The air supply and exhaust air in the furnace are controlled by 0.3kw powerful fan and frequency converter, and the air volume is automatically controlled by computer programs to meet the requirements of combustion, pressure and smoke exhaust;
6.2 Pressure release pipeline: The part in the furnace is made of high-temperature resistant diameter 300mm, SUS310S stainless steel pipe, which can withstand high temperature of 1300 °C. Welded pipes with a wall thickness of 5mm are used outside the furnace;
6.3 Pressure release power: AC220, 0.3kw high-pressure fan with high temperature resistance;
6.4 Furnace pressure control and data acquisition, furnace pressure can ensure real-time control according to the above standard requirements and the smoke exhaust system to form a control loop.
7. Furnace design index:
8.1 net volume of the device: 1.0m3
8.2 Net size in the device: length×width× height = 1.0×1.0×1.0m
8.3 External dimensions of the device: length×width×height=1.6×1.6×1.6m
8.4 Fuel used: natural gas (calorific value 8500Kcal/Nm3) or industrial gas;
8.5 Working temperature: The long-term working temperature of the furnace is below 1300°C; Heat up according to the set formula.
8. Gas alarm: used in gas room and test site.
9. Number of incendiary muskets: 2 sets
10. Sample test frame: movable heat-resistant steel plate, a total of 2 sets
11. Thermal insulation efficiency test: According to the GB/T14907-2018 standard, Appendix A, two thermocouples are initially arranged at the center of the backfire surface of the sample and 125mm away from the center line, and the thermocouples in the furnace are used to test and calculate the thermal insulation efficiency.
5. The internal insulation part of the device
1. The total thickness of the wall of the device is 215mm, and the inside and outside of the furnace are used respectively: the interior is made of 1700 °C high-temperature ceramic wool with thickness
50mm. The middle part is made of 75mm high-temperature mullite brick with a temperature resistance of 1480 °C density of 1.0g/cm3, and the outer part is covered with 304 stainless steel.
Beautiful and generous, corrosion resistant.

6. Smoke exhaust system:
1. The test device adopts the lower smoke exhaust method.
2. There is a trough-shaped smoke exhaust port at the bottom of the furnace, and then it is discharged through the induced draft fan.
2. The smoke exhaust fan and smoke exhaust duct are made of 304 stainless steel.