CN101871901A - System and method for detecting thermal protection performance of bunker clothing - Google Patents
System and method for detecting thermal protection performance of bunker clothing Download PDFInfo
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- CN101871901A CN101871901A CN 201010182511 CN201010182511A CN101871901A CN 101871901 A CN101871901 A CN 101871901A CN 201010182511 CN201010182511 CN 201010182511 CN 201010182511 A CN201010182511 A CN 201010182511A CN 101871901 A CN101871901 A CN 101871901A
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Abstract
The invention relates to an instrument for detecting thermal protection performance of bunker clothing. The instrument has a top-and-bottom structure, wherein a radiating heat source is formed at the bottom and a sample is arranged on the top; the temperature and the position of the radiating heat source are adjustable so as to simulate the thermal environment of a fire scene; the sample is placed in the environment; and the temperature of the sample rises gradually under the action of the radiating heat and then the heat flux passing through the sample is detected through a heat flux sensor. The quality of the sample is judged according to the time required for causing second-degree burn for the human body under the condition of standard heat flux in the biomedical engineering. The system and the method have the characteristics of high accuracy, high repetitiveness, simple operation, clear result display and the like.
Description
Technical field
The present invention relates to a kind of detection technique, particularly a kind of thermal protection performance of bunker clothing detection system and method.
Background technology
Fire-fighting suit is mainly used to reduce heat gathering on human body skin, and protection skin is not burnt or burnt, so fire-fighting suit not only requires its good flame resistance, and will have high heat-proof quality.Human body skin is very responsive to temperature.When the heat flow density of human body skin reaches 2.68J/cm
2, when promptly skin temperature reached 45 ℃, the people just had the cusalgia sense; When heat flow density increases to 5.02J/cm
2, when promptly the human body skin temperature reaches 72 ℃, will cause the second-degree burn of skin.It is at 2.0cal/cm that TPP detects
2S (84KW/m
2) under the standard thermal source environment, detect energy accumulation by sample, the time that finally reaches second-degree burn is estimated the thermal protective performance of fire-fighting suit.The great advantage of this method is to estimate the degree of burn by the energy that fabric is passed in measurement.
Fire-fighting suit is the most basic, a most important class protective gear in the protective gear of the fire-fighting soldier scene of a fire, is each essential safety equipment that is equipped with of fire-fighting soldier that enters the scene of a fire.The quality of the quality, particularly thermal protective performance of this class protective gear performance is directly connected to fire-fighting soldier's life security.The thermal protective performance that how to detect these fire-fighting suits is exactly very urgent problem.
Summary of the invention
The present invention be directed to the problem of present shortage to fire-fighting suit Performance Detection instrument, a kind of thermal protection performance of bunker clothing detection system and method have been proposed, by radiant heat source simulation scene of a fire thermal environment, sample is placed in this environment, under photothermal effect, the temperature of sample raises gradually, detects the thermoflux of passing sample by heat flux sensor then.And according in the biomedical engineering, human body required time when the standard heat flux situation is issued to second-degree burn is judged the quality of sample.
Technical scheme of the present invention is: a kind of thermal protection performance of bunker clothing detecting instrument, be divided into two casings up and down, nowel is divided into three casings in left, center, right, left box body is the electric control system of tester, middle casing is placed the electric furnace heating arrangement, right case is placed water circle device, top box is a protective cover, about and the front be organic glass, the top has a ventilating opening, adorn an exhaust fan in the ventilating opening, there are slide a test dolly and a guide rail in top box the inside, slide to test on the dolly refractory brick is housed, and on the left side has the aperture of placing the environment heat flux sensor, have the groove of placing sample on sliding machine the right, a sample fixing device is arranged in the groove, on sample fixing device, have an aperture of placing the sample heat flux sensor, a travel switch is housed in the left side of guide rail, data acquisition box is placed in the tester rear, power panel is arranged, environment heat flux sensor transducer in the data acquisition box, sample heat flux sensor transducer and connection terminal, transducer output signal and travel switch trigger pip are sent to data collecting card by connection terminal, data collecting card is sent into Computer Processing after the data that collect are carried out analog to digital conversion.
Described electric furnace heating arrangement comprises electric furnace, elevating mechanism, furnace temperature sensor, temperature controller, elevating mechanism places the bottom of electric furnace, scalable electric furnace height, furnace temperature sensor acquisition furnace temperature is sent into temperature controller, the heating wire on the temperature controller output control electric furnace.
Described electric control system comprises furnace temperature controller, water bath with thermostatic control temperature controller, travel switch, relay, environment heat flux sensor, sample heat flux sensor, seal closure and vent fan, data collecting card, computing machine, LCD and printer.
A kind of thermal protection performance of bunker clothing detection method comprises the thermal protection performance of bunker clothing detecting instrument, and the concrete grammar step is as follows:
1) safety inspection: check whether appliance wiring is correct, and whether water circulation system is normal, and whether the ventilation situation is good;
2) experiment is prepared: sample size should be 150mm*150mm, under 20 ℃ ± 2 ℃ and 65 ± 5% relative humidity condition, kept 24 hours, be placed on then on the position on dolly right side, press with the style stationary installation, open computer, start the thermal protective performance test macro;
3) experiment beginning:
A) operating ambient temperature is set: utilize temperature setting device on the heat source temperature control device to carry out temperature and set, generally be located in 850～1050 ℃ the scope;
B) utilize the temperature controller of water circle device to set the water temperature of recirculated water, generally be set in 31 ℃;
C) heat-insulation and heat-preservation of dolly part is connected furnace power over against electric furnace, begins to heat up;
D) the working environment thermoflux is demarcated: when the temperature displayed value on the heating source protractor during near working range, the dolly that moves to right is with environment heat flux sensor (100kW/m
2) over against electric furnace, whether the environment thermoflux value on the observation test system interface satisfies 2.0cal/cm
2S ± 0.1cal/cm
2S as satisfying, then enters next step; As not satisfying, the design temperature of then corresponding adjusting temperature controller, until environment thermoflux value at 1.9cal/cm
2S～2.1cal/cm
2In the s scope, and pairing temperature when remembeing that working environment thermoflux value satisfies;
E) dolly that moves to left, make device be in keeping warm mode once more, during pairing temperature, the dolly that moves to left starts second-degree burn real-time follow-up integrated curve until triggering limit switch when electric furnace is in the energising soaking condition and observes working environment thermoflux value and satisfy, this moment, measured material was over against electric furnace, observe the situation of change of measured curve simultaneously, in case when integrated curve and theoretic human body second-degree burn curve intersection, dolly moves to right, make device be in keeping warm mode, and logging test results;
F) change measured material, repeat e) step;
G) same material carries out three times and measures, and asks for the mean value of the TPP value that records for three times, the asking for of TPP value: TPP=F*T, TPP in the formula: thermal protection ability (cal/cm
2), F: environment thermoflux (cal/cm
2S), T: cause the time (s) of second-degree burn, the time that causes two degree degree burn that obtains is accurate to 0.1s, measurement result such as mean value＞28cal/cm
2, can judge that then this material is qualified; As mean value＜28cal/cm
2, can judge that then this material is defective;
H) end of test (EOT): turn off power switch.
Beneficial effect of the present invention is: thermal protection performance of bunker clothing detection system of the present invention and method, have the degree of accuracy height, and good reproducibility, simple to operate, characteristics such as clear display as a result.
Description of drawings
Fig. 1 is the second-degree burn curve map;
Fig. 2 is the middle test curve figure of actual detected;
Fig. 3 is a thermal protection performance of bunker clothing detection system structure front view of the present invention;
Fig. 4 is a thermal protection performance of bunker clothing detection system structure rear view of the present invention;
Fig. 5 is sliding machine structural drawing in the thermal protection performance of bunker clothing detection system of the present invention;
Fig. 6 is a thermal protection performance of bunker clothing detection system overall appearance synoptic diagram of the present invention;
Fig. 7 is a thermal protection performance of bunker clothing detection system data acquisition system (DAS) block diagram of the present invention.
Embodiment
According to the industry standards of public safety GA10-2002 of the People's Republic of China (PRC) " fireman put out a fire protective clothing " requirement, the fire-fighting cloth is at 2.0cal/cm
2Under the s standard environment, cause the skin second-degree burn time to be answered 〉=14S, instant heating protective capacities TPP value should be greater than 28cal/cm
2, cloth is qualified, if second-degree burn time＜14S (the TPP value is less than 28) is defective.TPP tests and tells us: it is many more that the simulation human body skin reaches second-degree burn institute palpus absorption energy through various cloth, that is to say that the TPP value is high more, and then cloth is exposed under high temperature and the high hot flame for health, and protectiveness is high more.Figure 1 shows that the second-degree burn curve that research obtains.
In the actual measurement process, when the output signal of sample heat flux sensor (15kW/m2) during to the integrated curve of time and theoretic human body second-degree burn curve intersection, this intersection point is the critical point of human body second-degree burn.Corresponding abscissa value is the time that causes second-degree burn required; Corresponding ordinate value is and sees through fire-fighting suit within a certain period of time and act on thermal energy on the human body skin unit area.Fig. 2 is the test curve in the actual detected.
Thermal protection performance of bunker clothing detection system structure front view as shown in Figure 3, whole is steelframe supporting construction 1, is divided into two casings up and down, nowel is divided into three casings in left, center, right:
1, left box body is the electric control system 12 of tester, mainly comprises power switch, Control of Electric Oven Temperature instrument and 4 relays.(water pump, electric furnace, water bath with thermostatic control heating rod and exhaust fan).
2, middle casing is placed electric furnace heating arrangement 3, mainly is made up of the electric furnace of a 1500W (alternating current 220V), and the heating furnace silk adopts high temperature nickel filament (anti-1300 ℃～1400 ℃ high temperature).The electric furnace height can be regulated by the elevating mechanism 13 of bottom, to change the distance of itself and sample and attemperator, prevents scattering and disappearing of heat, improves the speed that heats up.Furnace temperature can be regulated control by furnace temperature sensor and temperature controller, is 2.0cal/cm to satisfy thermal source
2S normal intensity, its effect are to guarantee that measurement environment maintains near the relative equilibrium position (temperature).
3, right case is placed water circle device 2, by the magnetic force water circulating pump, and water tank, the water bath with thermostatic control heating rod, the bath temperature sensor, the bath temperature controller is formed.The magnetic force ebullator, its effect mainly is to 15kW/m
2Material heat flux sensor 6 carry out water cycle cooling, guarantee its measuring accuracy.Bath temperature is set in 31 ℃ (simulation fireman skin temperatures).
Top box is a protective cover, about and the front be organic glass, the top has a ventilating opening 7, and installs an exhaust fan 8 additional.Its effect is to discharge the toxic gas that the sample burning produces in the experimentation, reduces to the injury of experiment operator with to the pollution of environment.There are slide a test dolly 4 and a guide rail in the inside.Slide to test on the dolly 4 refractory brick 10 is housed, and on the left side has the aperture of placing environment heat flux sensor 9.Have the groove of placing sample on sliding machine 4 the right, and increase a sample fixing device 5, on sample fixing device 5, have an aperture of placing sample heat flux sensor 6.A travel switch 11 is housed in the left side of guide rail.Slide as shown in Figure 5 and test the structural drawing of dolly 4, comprise sliding machine roller 15, sample fixing device handle 16, sliding machine handle 17, handled easily.
Data acquisition process and display part comprise following content: data acquisition box 14 is placed in the tester rear, as shown in Figure 4, mainly comprise power panel in the data acquisition box, environment heat flux sensor transducer, sample heat flux sensor transducer and connection terminal.Transducer output signal and travel switch trigger pip are sent to data collecting card by connection terminal.
As Fig. 7 data acquisition system (DAS) block diagram, data processing and display part comprise data collecting card, computing machine, display and corresponding data processing software.Sample heat flux sensor 6 and environment heat flux sensor 9 data are through arriving data collecting card behind the prime amplifier, data collecting card can carry out sending into Computer Processing after the analog to digital conversion to the data that collect.Time when display can show the heat that sample obtains in real time and reach second-degree burn.Printer can print the result of test.
As Fig. 6 overall appearance synoptic diagram, there are furnace temperature controller 18 and water bath with thermostatic control temperature controller 19 in the nowel surface, and control system is made up of electric furnace heating arrangement 3, furnace temperature controller 18, water circle device 2, water bath with thermostatic control temperature controller 19, travel switch 11, relay, environment heat flux sensor 9, sample heat flux sensor 6, slide test dolly 4, seal closure and vent fan 8, data collecting card, computing machine, LCD and printer.Wherein furnace temperature controller 18 can be controlled furnace temperature, makes it reach 2.0cal/cm
2The standard scene of a fire thermoflux requirement of s.Display can show test sample in the environment of this standard heat flux, required time when reaching second-degree burn.
The test dolly 4 that slides has three stations in left, center, right.During the experiment beginning, earlier sliding machine is mediated, the refractory brick at dolly middle part can cover the electric furnace at nowel middle part, reaches heat insulation effect.When furnace temperature reaches preset value, the environment heat flux sensor is placed in the sliding machine leftward position hole, and dolly is slided into the guide rail right side.Environment heat flux sensor 9 began to detect electric furnace and whether reached 2.0cal/cm this moment
2S standard thermal source, otherwise regulate furnace temperature until satisfying this requirement.Be placed on the 150mm*150mm sample in the sliding machine right part sample groove this moment, compresses with sample fixing device, makes sample and heat flux sensor 6 distances be 6mm.This distance is in order to simulate the distance between fireman's skin and the fire-fighting suit.The test dolly that slides then slides into the left side of guide rail, and triggers travel switch.This moment, acquisition system began to gather and write down the thermoflux that sample obtains.
Concrete method of testing step is as follows:
1) safety inspection: check whether appliance wiring is correct, and whether water circulation system is normal, and whether the ventilation situation is good.
2) experiment is prepared: sample size should be 150mm*150mm, comprises all each layers of representing the protective clothing experimental project.Under 20 ℃ ± 2 ℃ and 65 ± 5% relative humidity condition, kept 24 hours.Be placed on then on the relevant position on dolly right side, press with the style stationary installation.Open computer, start the thermal protective performance test macro, enter operation interface, click " START " button, enter the test wait state.
3) experiment beginning:
A) operating ambient temperature is set: utilize temperature setting device on the heat source temperature control device to carry out temperature and set, generally be located in 850～1050 ℃ the scope.
B) utilize the temperature controller of water circle device to set the water temperature of recirculated water, generally be set in 31 ℃
C) heat-insulation and heat-preservation of dolly part is connected furnace power over against electric furnace, begins to heat up.
D) the working environment thermoflux is demarcated: when the temperature displayed value on the heating source protractor during near working range, the dolly that moves to right is with environment heat flux sensor (100kW/m
2) over against electric furnace, whether the environment thermoflux value on the observation test system interface satisfies 2.0cal/cm
2S ± 0.1cal/cm
2S.As satisfying, then enter next step; As not satisfying, the design temperature of then corresponding adjusting temperature controller, until environment thermoflux value at 1.9cal/cm
2S～2.1cal/cm
2In the s scope.And pairing temperature when remembeing working environment thermoflux value OK.
E) dolly that moves to left makes device be in keeping warm mode once more.When electric furnace is in the energising soaking condition and when observing working environment thermoflux value OK during pairing temperature, the dolly that moves to left starts second-degree burn real-time follow-up integrated curve until triggering limit switch, this moment, measured material was over against electric furnace.Observe the situation of change of measured curve simultaneously, in case when integrated curve and theoretic human body second-degree burn curve intersection, the dolly that moves to right makes device be in keeping warm mode, and logging test results.
F) change measured material, repeat e) step.
G) same material carries out three measurements, and asks for the mean value of the TPP value that records for three times.Asking for of TPP value: TPP=F*T, TPP in the formula: thermal protection ability (cal/cm
2), F: environment thermoflux (cal/cm
2S), T: cause the time (s) of second-degree burn, the time that causes two degree degree burn that obtains is accurate to 0.1s, as mean value＞28cal/cm
2, can judge that then this material is qualified; As mean value＜28cal/cm
2, can judge that then this material is defective.
H) end of test (EOT): turn off power switch, the housekeeping platform.
Points for attention:
A) all experiments and calibration all should be carried out in a vent cabinet, so that take away products of combustion cigarette or flue gas;
B) black matrix of environment heat flux sensor part moisture-proof not, thus must keep vent cabinet upper left side environment heat flux sensor placed hole drying, in case the sensor black matrix is impaired.After each measurement material, dry the aqueous vapor on the sensor;
C) lead-in wire of sensor can not firmly pull or twist, otherwise damages easily;
When d) the sensor full scale was exported, the duration can not surpass 30s.
Claims (4)
1. thermal protection performance of bunker clothing detecting instrument, be divided into two casings up and down, nowel is divided into three casings in left, center, right, left box body is the electric control system of tester, middle casing is placed the electric furnace heating arrangement, right case is placed water circle device, it is characterized in that, top box is a protective cover, about and the front be organic glass, the top has a ventilating opening, adorn an exhaust fan in the ventilating opening, there are slide a test dolly and a guide rail in top box the inside, slide to test on the dolly refractory brick is housed, and on the left side has the aperture of placing the environment heat flux sensor, have the groove of placing sample on sliding machine the right, a sample fixing device is arranged in the groove, on sample fixing device, have an aperture of placing the sample heat flux sensor, in the left side of guide rail a travel switch is housed, data acquisition box is placed in the tester rear, and power panel is arranged in the data acquisition box, environment heat flux sensor transducer, sample heat flux sensor transducer and connection terminal, transducer output signal and travel switch trigger pip are sent to data collecting card by connection terminal, and data collecting card is sent into Computer Processing after the data that collect are carried out analog to digital conversion.
2. according to the described thermal protection performance of bunker clothing detecting instrument of claim 1, it is characterized in that, described electric furnace heating arrangement comprises electric furnace, elevating mechanism, furnace temperature sensor, temperature controller, elevating mechanism places the bottom of electric furnace, scalable electric furnace height, furnace temperature sensor acquisition furnace temperature is sent into temperature controller, the heating wire on the temperature controller output control electric furnace.
3. according to the described thermal protection performance of bunker clothing detecting instrument of claim 1, it is characterized in that described electric control system comprises furnace temperature controller, water bath with thermostatic control temperature controller, travel switch, relay, environment heat flux sensor, sample heat flux sensor, seal closure and vent fan, data collecting card, computing machine, LCD and printer.
4. a thermal protection performance of bunker clothing detection method comprises the thermal protection performance of bunker clothing detecting instrument, it is characterized in that, the concrete grammar step is as follows:
1) safety inspection: check whether appliance wiring is correct, and whether water circulation system is normal, and whether the ventilation situation is good;
2) experiment is prepared: sample size should be 150mm*150mm, under 20 ℃ ± 2 ℃ and 65 ± 5% relative humidity condition, kept 24 hours, be placed on then on the position on dolly right side, press with the style stationary installation, open computer, start the thermal protective performance test macro;
3) experiment beginning:
A) operating ambient temperature is set: utilize temperature setting device on the heat source temperature control device to carry out temperature and set, generally be located in 850～1050 ℃ the scope;
B) utilize the temperature controller of water circle device to set the water temperature of recirculated water, generally be set in 31 ℃;
C) heat-insulation and heat-preservation of dolly part is connected furnace power over against electric furnace, begins to heat up;
D) the working environment thermoflux is demarcated: when the temperature displayed value on the heating source protractor during near working range, the dolly that moves to right is with environment heat flux sensor (100kW/m
2) over against electric furnace, whether the environment thermoflux value on the observation test system interface satisfies 2.0cal/cm
2S ± 0.1cal/cm
2S as satisfying, then enters next step; As not satisfying, the design temperature of then corresponding adjusting temperature controller, until environment thermoflux value at 1.9cal/cm
2S～2.1cal/cm
2In the s scope, and pairing temperature when remembeing that working environment thermoflux value satisfies;
E) dolly that moves to left, make device be in keeping warm mode once more, during pairing temperature, the dolly that moves to left starts second-degree burn real-time follow-up integrated curve until triggering limit switch when electric furnace is in the energising soaking condition and observes working environment thermoflux value and satisfy, this moment, measured material was over against electric furnace, observe the situation of change of measured curve simultaneously, in case when integrated curve and theoretic human body second-degree burn curve intersection, dolly moves to right, make device be in keeping warm mode, and logging test results;
F) change measured material, repeat e) step;
G) same material carries out three times and measures, and asks for the mean value of the TPP value that records for three times, the asking for of TPP value: TPP=F*T, TPP in the formula: thermal protection ability (cal/cm
2), F: environment thermoflux (cal/cm
2S), T: cause the time (s) of second-degree burn, the time that causes two degree degree burn that obtains is accurate to 0.1s, measurement result such as mean value＞28cal/cm
2, can judge that then this material is qualified; As mean value＜28cal/cm
2, can judge that then this material is defective;
H) end of test (EOT): turn off power switch.
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|---|---|---|---|
| CN2010101825111A CN101871901B (en) | 2010-05-25 | 2010-05-25 | System and method for detecting thermal protection performance of bunker clothing |
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|---|---|---|---|
| CN2010101825111A CN101871901B (en) | 2010-05-25 | 2010-05-25 | System and method for detecting thermal protection performance of bunker clothing |
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| CN101871901A true CN101871901A (en) | 2010-10-27 |
| CN101871901B CN101871901B (en) | 2012-11-07 |
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| CN111187711A (en) * | 2020-02-08 | 2020-05-22 | 福建柒牌时装科技股份有限公司 | Device for detecting infection medium blocking capability of protective clothing |
| CN111829913A (en) * | 2020-08-18 | 2020-10-27 | 湖南科技大学 | Device and method for detecting thermal shock resistance of fire-fighting suit in fire scene environment |
| CN111829913B (en) * | 2020-08-18 | 2024-04-19 | 湖南科技大学 | Detection method for fire-fighting suit thermal shock resistance detection device in fire scene environment |
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| CN113916581A (en) * | 2021-10-29 | 2022-01-11 | 徐州工业锅炉有限公司 | Automatic thermal performance testing device for industrial boiler |
| CN118112168A (en) * | 2024-04-30 | 2024-05-31 | 中拓特纺(常州)纺织科技有限公司 | Protective clothing flame retardant performance testing arrangement |
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