CN107300572B - System and method for testing critical thermal radiation flux of flooring material - Google Patents
System and method for testing critical thermal radiation flux of flooring material Download PDFInfo
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- CN107300572B CN107300572B CN201710517002.1A CN201710517002A CN107300572B CN 107300572 B CN107300572 B CN 107300572B CN 201710517002 A CN201710517002 A CN 201710517002A CN 107300572 B CN107300572 B CN 107300572B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
Abstract
The invention provides a system and a method for testing the critical thermal radiation flux of a flooring material, wherein the system for testing the critical thermal radiation flux of the flooring material comprises a detection box, a sliding platform, a pneumatic control module and a processing module, wherein the pneumatic control module is fixedly connected with the detection box, the sliding platform is movably connected with the detection box, and the processing module is in data connection with the detection box and the pneumatic control module; the processing module comprises a plurality of light path components which are respectively arranged on the detection box and the air control module; according to the invention, the light shading rate of smoke is detected through the light path component, the detection result of the pavement material critical thermal radiation flux test system is calculated and corrected through a formula, the adverse effect of smoke generated by the combustion of the test piece on the measurement data is avoided, and the detection accuracy of the pavement material critical thermal radiation flux test system is ensured.
Description
Technical Field
The invention relates to the field of material combustion performance, in particular to a system and a method for testing critical thermal radiation flux of a flooring material.
Background
With the rapid development of social economy, many places with intensive personnel are decorated by combustible materials, and how to effectively reduce the quantity of the combustible decoration materials and improve the fireproof performance of the decoration materials is a difficult and heavy work faced by the current fire fighting work. The paving material is used as an important decoration material in a large amount in various public places, the combustion performance of the paving material is correctly detected and the paving material is controlled to be used according to the standard requirement, and the paving material has certain practical significance for effectively reducing and eliminating the fire hazard.
The critical heat radiation flux is a main parameter for inspecting the fire hazard of the floor material, represents the combustion spreading capacity of a floor material sample under the condition of external heat radiation, is an important index in a floor material building product combustion performance grading system, and is widely used in mandatory national standards such as GB 20286-. At present, the measurement of the critical heat radiation flux of the paving material mainly depends on a specific test method of the combustion performance of the paving material, GB/T11785-2005 'method for measuring the combustion performance of the paving material for measuring the radiant heat source', and the critical heat radiation flux of a sample measured by the method can be understood as the lowest critical heat radiation intensity required for maintaining the combustion of the sample in a fire scene.
However, in the existing system for testing the critical thermal radiation flux of the flooring material, a part of samples generate a large amount of dense smoke during combustion, and the test is continued under the influence of the dense smoke, so that the test data generates large errors, and the deviation of the test result is caused.
In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.
Disclosure of Invention
In order to solve the problems, the invention adopts the technical scheme that the critical thermal radiation flux test system for the flooring material is provided, and comprises a detection box, a sliding platform, a pneumatic control module and a processing module, wherein the pneumatic control module is fixedly connected with the detection box, the sliding platform is movably connected with the detection box, and the processing module is in data connection with the detection box and the pneumatic control module; the processing module comprises a plurality of light path components, and the light path components are respectively arranged on the detection box and the air control module.
Preferably, the gas accuse module is including the unit of discharging fume and air feed unit, the unit of discharging fume the air feed unit respectively with detection case fixed connection, the unit of discharging fume with the air feed unit is used for controlling the gas velocity of flow in the detection case.
Preferably, the smoke exhaust unit comprises a diversion pipeline, the gas supply unit comprises an air inlet pipeline, the diversion pipeline and the air inlet pipeline are arranged on the inner surface of the detection box, the diversion pipeline is used for collecting smoke generated by combustion, and the air inlet pipeline is used for conveying air into the detection box.
Preferably, the system for testing the critical thermal radiation flux of the flooring material further comprises a first connecting device and a second connecting device, the sliding platform is connected with the detection box in a sealing mode through the first connecting device, and the sliding platform is movably connected with the detection box through the second connecting device.
Preferably, the detection case includes box, support, heat flow meter subassembly, radiation plate, combustor, radiation pyrometer, the support with box fixed connection, the heat flow meter subassembly sets up the bottom half, the radiation plate with the combustor sets up in the box, radiation pyrometer sets up on the support.
The invention also provides a test method using the test system for the critical thermal radiation flux of the flooring material, which comprises the following steps:
s1, calibrating relevant equipment in the flooring material critical thermal radiation flux test system, and drawing a radiation flux curve;
s2, placing a test piece in the detection box, igniting the test piece, observing and recording the combustion condition of the test piece under thermal radiation, and recording smoke shading rate data and uploading the data to the processing module by the optical path component;
and S3, measuring the flame propagation distance of the test piece, uploading the flame propagation distance to the processing module, processing the detection data through the processing module, and calculating the real flame propagation distance.
Preferably, in the step S1, the simulation sample is fixed on the sliding platform, and the sliding platform is moved into the box body, so as to ensure the tightness between the box body and the sliding platform; adjusting the smoke exhaust unit and the gas supply unit to stabilize the flow rate of gas in the detection box, and heating the radiation plate until the temperature in the detection box is stable; adjusting the radiation plate, measuring radiation flux data of a measuring point through the heat flow meter assembly, and drawing the radiation flux data into a radiation flux curve; and detecting smoke shading rate data through the light path component, and uploading the data to the processing module.
Preferably, in the step S2, the test piece is fixed on the sliding platform, the sliding platform is moved into the detection box, the radiation plate is ignited to stabilize the temperature in the detection box, and the test piece is ignited by the burner; in the test piece combustion process, the air flow in the detection box is ensured to be stable; and the light path component records smoke shading rate data and uploads the data to the processing module.
Preferably, the flame propagation distance of the test piece is measured and uploaded to the processing module, the processing module processes data to calculate the real flame propagation distance L', and the critical thermal radiation flux of the test piece is obtained by comparing the real flame propagation distance with the radiation flux curve.
Preferably, the calculation formula of the real flame propagation distance L' is
Wherein L is a flame propagation distance actually measured for the test piece, N is the number of the light path components arranged on the detection box, Ci' is the average value of the smoke shading rate, C, detected by the ith optical path component arranged on the detection box in the test piece combustion processiThe test piece testing method comprises the steps of setting a smoke shading rate average value of an ith light path component arranged on a detection box and detected in a calibration process, and setting a smoke shading rate average value of the light path component arranged on a pneumatic control module and detected in a test piece combustion process.
Compared with the prior art, the invention has the beneficial effects that: 1, processing pressure variation data of the air chamber detected by the pressure sensor and gas flow rate data of the smoke exhaust pipeline detected by the anemometer through the processor, and controlling the gas flow rate in the box body by adjusting the exhaust fan and the compressor to ensure that the environment in the box body is stable; 2, the diversion pipeline and the air inlet pipeline are arranged on two sides of the box body, so that the influence of airflow generated in the diversion pipeline and the air inlet pipeline on combustion of the test piece is avoided, the influence of the airflow on detection data is avoided, smoke generated by the combustion of the test piece is quickly discharged out of the detection box through the diversion pipeline and the air inlet pipeline, and the influence of the smoke on a detection result is reduced; and 3, detecting the shading rate of the smoke through the light path component, calculating and correcting the detection result of the pavement material critical thermal radiation flux test system through a formula, avoiding the adverse effect of the smoke generated by the combustion of the test piece on the measurement data, and ensuring the detection accuracy of the pavement material critical thermal radiation flux test system.
Drawings
FIG. 1 is a schematic structural view (front view) of a critical thermal radiant flux testing system for flooring material according to the present invention;
fig. 2 is a schematic structural diagram (side view) of a flooring critical thermal radiant flux testing system according to the present invention.
The figures in the drawings represent:
1-detection box; 2-a sliding platform; 3-a pneumatic control module; 11-a box body; 12-a scaffold; 13-a heat flow meter assembly; 14-a radiation plate; 15-a burner; 16-a radiation pyrometer; 31-a smoke exhaust unit; 32-an air supply unit; 131-a lifting device; 132-heat flow meter; 133-a control lever; 311-a diversion pipeline; 312 smoke exhaust pipes; 321-a compressor; 322-air chamber; 323-gas inlet duct; 41-optical path components; 42-processor.
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Example one
Please refer to fig. 1 and 2, which are schematic structural diagrams of a critical bolometric flux testing system of a flooring material according to the present invention.
As shown in fig. 1 and 2, the critical thermal radiation flux testing system for the flooring material comprises a detection box 1, a sliding platform 2 and an air control module 3, wherein the air control module 3 is fixedly connected with the detection box 1, and the air control module 3 is used for controlling the air circulation between the detection box 1 and the external environment; the sliding platform 2 is movably connected with the detection box 1, the sliding platform 2 can freely enter and exit the detection box 1, and the sliding platform 2 is used for fixing a test piece; the detection box 1 is fixed on the ground.
The detection box 1 comprises a box body 11 and a bracket 12, wherein the box body 11 is fixed on the ground through the bracket 12. Box 11 sets up heat source subassembly, heat flow meter subassembly 13, the heat source subassembly sets up inside box 11, heat flow meter subassembly 13 sets up the box 11 bottom, heat flow meter subassembly 13 is used for carrying out heat flux value detection to the measuring point.
The heat source assembly comprises a radiation plate 14, a burner 15, a first adjusting device and a second adjusting device, the radiation plate 14 is movably connected with the detection box 1 through the first adjusting device, the burner 15 is movably connected with the detection box 1 through the second adjusting device, the radiation plate 14 is adjusted in inclination angle through the first adjusting device, the burner 15 is adjusted in horizontal distance with the sliding platform 2 through the second adjusting device, the radiation plate 14 is used for applying heat radiation to a test piece fixed on the sliding platform 2, and the burner 15 is used for igniting the test piece.
First adjusting device is including rotating connecting portion, activity adjustment portion, 14 lower parts of radiant panel pass through rotate connecting portion with detection case 1 fixed connection, radiant panel 14 can wind rotate connecting portion rotate, radiant panel 14 passes through activity adjustment portion with detection case 1 is connected, through adjusting activity adjustment portion makes radiant panel 14 winds it rotates thereby adjusts to rotate connecting portion the inclination of radiant panel 14. The movable adjusting part preferably includes one of a cylinder or a rope sheave device, and the inclination angle of the radiant panel 14 is controlled by adjusting the length of a telescopic rod of the cylinder or the length of a rope of the rope sheave device.
The second adjusting device comprises a push rod and a position sensor, the combustor 15 is connected with the detection box 1 through the push rod, the push rod adjusts the position of the combustor 15 in the horizontal direction, and the position sensor is used for controlling the push rod to limit the combustor 15.
The detection box 1 further comprises a radiation heat source flame detection component, a radiation heat source ignition needle, a burner flame detection component and a burner ignition needle, wherein the radiation heat source flame detection component and the radiation heat source ignition needle are matched with the radiation plate 14, and the burner flame detection component and the burner ignition needle are matched with the burner 15.
The heat flow meter assembly 13 comprises a lifting device 131, a heat flow meter 132, a control rod 133, wherein the heat flow meter 132 is fixed on the control rod 133, the control rod 133 is fixedly connected with the lifting device 131, the control rod 133 controls the moving position of the heat flow meter 132 in the horizontal direction, the lifting device 131 is used for controlling the movement of the heat flow meter 132 in the vertical direction, and the heat flow meter 132 can be positioned at a plurality of positions on the lower side of the sliding platform 2 for detecting heat flux values through the combined action of the control rod 133 and the lifting device 131.
The detection box 1 further comprises a radiation pyrometer 16, wherein the radiation pyrometer 16 is arranged on the support, and the radiation pyrometer 16 is used for detecting the temperature of the radiation plate 14 in the test process.
The sliding platform 2 comprises a test platform and a clamp, the test piece is fixed on the test platform through the clamp, and when the sliding platform 2 moves into the detection box 1, the radiation plate 14 can perform heat radiation on the test piece on the test platform.
The pneumatic control module 3 comprises a smoke exhaust unit 31 and an air supply unit 32, the smoke exhaust unit 31 comprises a diversion pipeline 311 and a smoke exhaust pipeline 312, and the air supply unit 32 comprises a compressor 321, an air chamber 322 and an air inlet pipeline 323. An exhaust fan is arranged in the smoke exhaust pipeline 312, the flow guide pipeline 311 and the air inlet pipeline 323 are arranged in the box body 11, and the flow guide pipeline 311 is connected with the smoke exhaust pipeline 321 in a sealing manner; the air inlet pipeline 323 is connected with the air chamber 322, the air chamber 322 is arranged at the lower part of the box body 11, the lower part of the box body 11 is provided with an air hole, the air chamber 322 is connected with the air inlet pipeline 323 through the air hole, the air chamber 322 is connected with the compressor 321 through the air hole, a pressure sensor is arranged in the air chamber 322, and the pressure change in the air chamber 322 is detected through the pressure sensor.
The guide pipe 311 and the air inlet pipe 323 are arranged on the inner surfaces of two sides of the box body 11, the height of an air outlet pipe opening of the air inlet pipe 323 is slightly lower than the surface of the sliding platform, and the height of an air inlet pipe opening of the guide pipe 311 is slightly lower than the surface of the radiation plate, so that the influence of air flow in the guide pipe 311 and the air inlet pipe 323 on the combustion of the test piece is avoided, and the influence of the air flow on detection data is reduced; and through the arrangement of the diversion pipeline 311 and the air inlet pipeline 323, the smoke generated by the combustion of the test piece is quickly discharged out of the detection box, the circulation of air in the detection box is ensured, and the influence of the smoke on detection data is reduced.
Critical thermal radiation flux test system of flooring material still includes processing module 4, processing module 4 includes light path subassembly 41, thermocouple, anemograph, treater 42, light path subassembly 41 detects smog shading rate, the thermocouple is used for detecting temperature in the box 11, the anemograph is measured the gas velocity of flow in exhaust pipe 312, treater 42 is used for the data of record processing each device and issues each device of instruction control through the result of handling. The processor 42 is in data connection with the optical path assembly 51, the thermocouple, the pressure sensor, the radiation pyrometer 16, the heat flow meter assembly 13, the first adjustment device, and the second adjustment device; the processor 42 processes the pressure variation data of the air chamber 322 detected by the pressure sensor and the gas flow rate data of the smoke exhaust pipeline 312 detected by the anemometer, and controls the gas flow rate in the box body 11 by adjusting the exhaust fan and the compressor, so as to ensure the stability of the environment in the box body 11.
Example two
The second embodiment is further improved on the basis of the first embodiment, and is characterized in that the flooring material critical thermal radiation flux testing system further comprises a first connecting device and a second connecting device, the first connecting device comprises a first tooth fastening part and a second tooth fastening part, the first tooth fastening part is arranged on the sliding platform, the second tooth fastening part is arranged on the box body, and the first tooth fastening part and the second tooth fastening part are correspondingly arranged.
The second connecting device comprises a guide rail and a sliding block, the sliding block is fixed on the sliding platform, the guide rail is fixed at the bottom of the box body, and the sliding platform can freely enter and exit the box body through the movable connection effect of the sliding block and the guide rail.
First tooth knot portion includes first interlock tooth and first sealing, second tooth knot portion includes second interlock tooth and second sealing, works as sliding platform with when the box is connected integratively, first interlock tooth with the interlock of second interlock tooth forms interlock portion, first sealing with second sealing is in respectively the inside and outside both sides of box realize the separation the effect of box inside and outside circulation of air, through first interlock tooth with the connection of second interlock tooth is guaranteed to be fixed sliding platform is last test piece and setting are in the box the combustor reaches the radiation plate is relative position stability, avoids right the combustor with the repeated calibration of radiation plate position state realizes the accuracy of flooring material critical heat radiation flux test system detected data.
EXAMPLE III
The third embodiment is further improved on the basis of the first embodiment, and is characterized in that the optical path component 41 comprises a laser, a collimator, a primary detector, a spectroscope, a reference detector and a collector. The light beam emitted by the laser is divided into two paths by the spectroscope, one path is monitored by the reference detector and converted into reference data, the other path is used as measuring light beam to enter smoke, the measuring light beam passes through the smoke and is collected by the collimator and converted into detection data by the main detector, the reference data and the detection data are collected by the collector and uploaded to the processor 42, and the processor 42 processes the light shading rate of the smoke according to the reference data and the detection data.
The smoke exhaust pipeline 312 is provided with one light path component 41, the smoke output of the test piece is calculated through detection of the light path component 41 arranged on the smoke exhaust pipeline 312, and important combustion parameters of the test piece are detected. Set up a plurality of on the box 11 light path subassembly 41 is in through setting up on the box 11 light path subassembly 41 is right the smog shading rate of each measuring point detects in the test piece testing process, and passes through the post processing of treater 42 gets rid of the test piece is when burning produced smog to the influence of experimental result, guarantees the accuracy of the critical thermal radiation flux test system test result of flooring material, preferred use the perpendicular to sliding platform moving direction the box central line is axis bilateral symmetry and evenly arranges.
Example four
The invention relates to a test method using the test system for the critical thermal radiation flux of a flooring material, which comprises the following steps
S1, calibrating relevant equipment in the flooring material critical thermal radiation flux test system, and drawing a radiation flux curve;
s2, placing a test piece in the detection box 1, igniting the test piece, observing and recording the combustion condition of the test piece under thermal radiation, and recording smoke shading rate data and uploading the data to the processing module by the optical path component;
and S3, measuring the flame propagation distance of the test piece, uploading the flame propagation distance to the processing module, processing the detection data through the processing module, and calculating to obtain the real flame propagation distance.
The step S1 is specifically to fix the simulation sample on the sliding platform 2, and move the sliding platform 2 into the box body 11, so as to ensure the sealing performance between the box body 11 and the sliding platform 2; adjusting the smoke exhaust unit 31 and the gas supply unit 32 to enable the gas flow velocity in the detection box 1 to meet (2.5 +/-0.2) m/s, then igniting the radiation plate 14, and enabling the radiation plate 14 to be heated for at least 1 hour until the temperature in the detection box 1 is stable, wherein in the process, the burner 15 is turned off.
Establish the simulation sample is close to the one end of combustor 15 direction is the initiating terminal, uses heat flow meter 132 is in on the simulation sample apart from initiating terminal 410 mm's position measurement radiant flux, when measuring heat flow meter 132 the detection surface with simulation sample face is parallel and exceeds 2mm ~ 3mm, reads measured data behind 30s, through adjusting radiant panel 14, makes heat flow meter 132 be in the radiant flux that 410mm department measured is (5.1 +/-0.2) kW/m2(ii) a And sequentially measuring other measuring points, preferably uniformly arranged measuring points which start from a position 110mm away from the starting end to a position 910mm away from the starting end and have a distance of 100mm, on the simulated sample, and drawing the measured data into a radiation flux curve.
After the end of measuring the radiation flux, the detection data of the light path component 41 are recorded and uploaded into the processor 42.
And after the radiation flux curve is drawn, taking out the simulation sample on the sliding platform 2, ensuring the sliding platform 2 to be in sealing connection with the detection box 1, and detecting the blackbody temperature of the radiation plate 14 and the temperature of the detection box.
Step S2 is specifically to fix the test piece on the sliding platform 2, move the sliding platform 2 into the detection box 1, ignite the radiation plate 14, heat the radiation plate 14 for at least 1 hour until the temperature in the detection box 1 is stable, adjust the radiation plate 14, make the deviation between the black body temperature and the measured value in step S1 within the range of ± 5 ℃, and make the deviation between the detection box temperature and the measured value in step S1 within the range of ± 10 ℃.
The burner 15 was ignited and the burner 15 was moved to the edge of the test piece, the test piece was ignited and the burner flame was kept in contact with the test piece for 10min, then the burner 15 was removed and the burner 15 was extinguished. And in the test piece combustion process, the air flow in the detection box 1 is ensured to be stable. And the detection process is finished and judged, namely, the detection is finished when the combustor 15 is ignited for detecting for 30min or the flame on the surface of the test piece stops spreading within 30min and is extinguished so as to finish the detection. The optical path component 41 records data of each measuring point during the detection process and uploads the data to the processor 42.
And measuring the flame propagation distance of the test piece and uploading the flame propagation distance to the processor 42, wherein the processor 42 calculates the real flame propagation distance L' by processing each datum, and the critical thermal radiation flux of the test piece is obtained by comparing the real flame propagation distance with the radiation flux curve.
The formula of the real flame propagation distance L' is
Wherein L is a flame propagation distance actually measured for the test piece, N is the number of the light path components 41 provided on the case, Ci' is the average value of the smoke shielding rates, C, detected in step S2 of the ith light path component 41 arranged on the box bodyiC is the average value of the smoke shielding rates detected in step S1 by the ith light path component 41 disposed on the box, and C is the average value of the smoke shielding rates detected in step S2 by the light path component 41 disposed on the smoke exhaust duct.
By taking the upward value of the processed detection data, parameters which do not meet the conditions are removed, the influence on the calculation result caused by overlarge deviation between the detected data and other data due to the fact that part of the detection positions of the light path components 41 are not combusted is eliminated, errors in the calculation data are avoided, and when the average value of the smoke shading rate detected in the step S2 is smaller than a certain value, namely the smoke generated by combustion of the test piece is smaller than a certain concentration, the effect that the smoke absorbs heat radiation generated by the radiation plate is large, so that the real flame propagation distance L' is larger than the measured flame propagation distance L; when the average value of the smoke shielding rates detected in step S2 is greater than a certain value, that is, when the smoke generated by burning the test piece is greater than a certain concentration, a large amount of heat carried by the smoke during burning has a large additional thermal radiation effect on the test piece, so that the real flame propagation distance L' is smaller than the measured flame propagation distance L.
In the detection process, a large amount of smoke is generated by the combustion of the test piece, and the smoke brings a large amount of heat to generate an additional heat radiation effect on the test piece in the combustion process, so that the surface temperature of the test piece is kept in a high state, and the flame propagation distance of the test piece is increased; meanwhile, a large amount of particulate matters are attached to the smoke, and the particulate matters can absorb the heat radiation generated by the radiation plate and are exhausted through the smoke exhaust unit, so that the heat radiation of the test piece by the radiation plate cannot be distributed as described by the radiation flux curve, and the deviation of the actual detection result is caused.
Through the calculation of a formula, the detection result of the flooring material critical thermal radiation flux test system is corrected, the adverse effect of smoke generated by the combustion of the test piece on the measurement data is avoided, and the detection accuracy of the flooring material critical thermal radiation flux test system is ensured.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and additions can be made without departing from the method of the present invention, and these modifications and additions should also be regarded as the protection scope of the present invention.
Claims (7)
1. The test method is characterized in that the test system comprises a detection box, a sliding platform, a pneumatic control module and a processing module, wherein the pneumatic control module is fixedly connected with the detection box, the sliding platform is movably connected with the detection box, and the processing module is in data connection with the detection box and the pneumatic control module; the processing module comprises a plurality of light path components which are respectively arranged on the detection box and the air control module;
the test method comprises the following steps:
s1, calibrating relevant equipment in the flooring material critical thermal radiation flux test system, and drawing a radiation flux curve;
s2, placing a test piece in the detection box, igniting the test piece, observing and recording the combustion condition of the test piece under thermal radiation, and recording smoke shading rate data and uploading the data to the processing module by the optical path component;
s3, measuring the flame propagation distance of the test piece, uploading the flame propagation distance to the processing module, processing the detection data through the processing module, and calculating the real flame propagation distance;
the step S3 is specifically to measure the flame propagation distance of the test piece and upload the flame propagation distance to the processing module, where the processing module calculates the real flame propagation distance L' by processing data, and obtains the critical thermal radiation flux of the test piece by comparing the real flame propagation distance with the radiation flux curve;
the calculation formula of the real flame propagation distance L' is as follows
Wherein L is a flame propagation distance actually measured for the test piece, N is the number of the light path components arranged on the detection box, Ci' is the average value of the smoke shading rate, C, detected by the ith optical path component arranged on the detection box in the test piece combustion processiThe test piece testing method comprises the steps of setting a smoke shading rate average value of an ith light path component arranged on a detection box and detected in a calibration process, and setting a smoke shading rate average value of the light path component arranged on a pneumatic control module and detected in a test piece combustion process.
2. The testing method using the critical thermal radiant flux testing system of the flooring material as claimed in claim 1, wherein the pneumatic control module comprises a smoke exhaust unit and an air supply unit, the smoke exhaust unit and the air supply unit are respectively and fixedly connected with the detection box, and the smoke exhaust unit and the air supply unit are used for controlling the flow rate of gas in the detection box.
3. The method for testing a critical thermal radiant flux test system for flooring material of claim 2, wherein said smoke evacuation unit comprises a guide duct, said air supply unit comprises an air inlet duct, said guide duct and said air inlet duct are disposed on an inner surface of said test chamber, said guide duct is used for collecting smoke generated by combustion, and said air inlet duct is used for delivering air into said test chamber.
4. The testing method using a flooring critical thermal radiant flux testing system of claim 1, further comprising a first connecting means and a second connecting means, wherein the sliding platform is hermetically connected with the detection box through the first connecting means, and the sliding platform is movably connected with the detection box through the second connecting means.
5. The testing method using the flooring critical thermal radiant flux testing system according to claim 2, wherein the inspection box comprises a box body, a bracket, a heat flow meter assembly, a radiation plate, a burner, a radiation pyrometer, the bracket being fixedly connected to the box body, the heat flow meter assembly being disposed at a bottom of the box body, the radiation plate and the burner being disposed in the box body, the radiation pyrometer being disposed on the bracket.
6. The method for testing a critical radiant flux test system for flooring material as claimed in claim 5, wherein said step S1 is to fix the simulation sample on the sliding platform and move the sliding platform into the box to ensure the sealing performance of the box and the sliding platform; adjusting the smoke exhaust unit and the gas supply unit to stabilize the flow rate of gas in the detection box, and heating the radiation plate until the temperature in the detection box is stable; adjusting the radiation plate, measuring radiation flux data of a measuring point through the heat flow meter assembly, and drawing the radiation flux data into a radiation flux curve; and detecting smoke shading rate data through the light path component, and uploading the data to the processing module.
7. The method for testing a critical thermal radiant flux test system for flooring material as claimed in claim 5, wherein said step S2 is to fix said test piece on said sliding platform, move said sliding platform into said test box, ignite said radiation plate to stabilize the temperature in said test box, and ignite said test piece by said burner; in the test piece combustion process, the air flow in the detection box is ensured to be stable; and the light path component records smoke shading rate data and uploads the data to the processing module.
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| CN104237451A (en) * | 2014-09-26 | 2014-12-24 | 上海合评消防检测中心 | Device for separating standalone burning trolley from main burner fixing bottom plate |
| CN104865289A (en) * | 2015-05-25 | 2015-08-26 | 苏州菲尼克斯质检仪器有限公司 | Flooring material heat radiation tester |
| CN205301219U (en) * | 2015-12-05 | 2016-06-08 | 天津吉源恒益科技有限公司 | Hot radiation warning assembly of pavement heat radiation tester |
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