CN105319238A - Infrared heating testing device and testing method for bituminous pavement - Google Patents
Infrared heating testing device and testing method for bituminous pavement Download PDFInfo
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- CN105319238A CN105319238A CN201510784776.1A CN201510784776A CN105319238A CN 105319238 A CN105319238 A CN 105319238A CN 201510784776 A CN201510784776 A CN 201510784776A CN 105319238 A CN105319238 A CN 105319238A
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Abstract
The invention discloses an infrared heating testing device and testing method for bituminous pavement, and aims to enable the measured test data conclusion to play a theoretical guiding function on practice, and further enable the accuracy to be high, the simulation performance to be high and operation to be simple; the infrared heating testing device comprises a test bed framework, wherein an infrared ray generation device is arranged on the test bed framework; the infrared ray generation device is connected with an infrared ray generation controller, a liquefied petroleum gas inlet control valve and a variable-frequency air blower; the liquefied petroleum gas inlet control valve is connected to a liquefied petroleum gas source; the variable-frequency air blower is connected with an air source; a test block tray used for placement of a pitch test block is arranged at the lower end of the infrared ray generation device; an infrared radiation flow sensor capable of collecting the infrared ray radiation quantity of the infrared ray generation device is arranged on the test block tray; a plurality of temperature sensors are arranged in the pitch test block during testing; the infrared radiation flow sensor and the temperature sensors are all connected to a data acquisition instrument; the data acquisition instrument is connected to a computer capable of displaying test data.
Description
Technical field
The invention belongs to highway engineering technical field, be specifically related to a kind of bituminous pavement infrared heating test unit and test method.
Background technology
Along with the high speed development of highway in China, the bituminous highway built in the past, owing to increasing rapidly by the volume of traffic, vehicle maximizes, overload is serious and the factor such as construction quality affects, cause bituminous pavement to reach far away namely to have occurred tenure of use the disease such as crack, hole groove, rut, depression, be therefore badly in need of the maintenance that suitable Asphalt Pavement Maintenance Technology is in addition suitable to this.And traditional maintenance process be dig, bituminous pavement that milling, the cementation of fissures have disease, this method not only pollutes the environment in enforcement engineering, and can cause the waste of pitch of a large amount of high-quality.Faced with this situation, how to adopt more environmental protection, more save, affect little asphalt pavement conserving method, so just there is multiple maintenance method, mainly contain the modes such as heating by infrared radiation, Cycling hot-blast heating, microwave heating.Wherein, when using heating by infrared radiation to have a bituminous pavement of disease, produce ultrared device and need burning petroleum liquefied gas as fuel heating alloys grid, infrared ray will be sent when the temperature of alloy grid arrives to a certain degree, and then be radiated at old asphalt pavement and heat, but the consumption of the energy is larger in the process, because the technology of infrared radiation heating bituminous pavement is also immature.
In the implementation process using heating by infrared radiation pitch old pavement, if the heat time is long or oil liquefied gas air inflow is excessive, thus can produce too much heat may make the surface temperature of old asphalt pavement too high and performance degradation, more serious situation is that surperficial pitch catches fire and carbonizes hardening, the recyclability of pitch is caused greatly to reduce, not only waste resource, contaminated environment, and work efficiency also can reduce greatly.So, needing can according to the material properties of bituminous pavement and disease incidence in the process using heating by infrared radiation, by adjusting the air inflow of the consumption of LPG gasifying and the rotating speed of fan blower and air, the premix of gas consumption and air inlet amount can be made right to certain proportion, or regulate the distance of infrared generator and bituminous pavement, light combination gas and make its Thorough combustion and the more heats of release, the infrared radiation amount making it occur is in the scope that practical operation requires.Therefore, a kind of test unit of necessary design comes to be optimized research to the technology of heating by infrared radiation bituminous pavement further.
Summary of the invention
In order to solve the problems of the prior art, the present invention proposes that a kind of degree of accuracy is high, simulation is strong, simple to operate, records test figure conclusion can play theoretical direction effect bituminous pavement infrared heating test unit and test method to practice.
In order to realize above object, the technical solution adopted in the present invention is:
A kind of bituminous pavement infrared heating test unit, comprise test bed framework, test bed framework is provided with infrared generator, infrared generator is connected with infrared ray generator controller, oil liquefied gas air intake control valve and frequency conversion fan blower, oil liquefied gas air intake control valve is connected to L. P. G source of the gas, frequency conversion fan blower connects air-source, the positive lower end of infrared generator is provided with the test block pallet for placing asphalt test block, test block pallet is provided with the infrared radiation flow sensor that can gather infrared generator infrared radiation amount, several temperature sensors are provided with in asphalt test block during test, described infrared radiation flow sensor and temperature sensor are all connected to data collecting instrument, data collecting instrument is connected to the computing machine that can show test figure.
Described test bed framework is provided with jacking gear, and described test block pallet is fixedly installed on jacking gear, can be adjusted the distance in asphalt test block upper surface and infrared radiation face by described jacking gear.
Water jacket thermal insulator is provided with between described test block pallet and the table top of jacking gear.
Described oil liquefied gas air intake control valve is connected to oil liquefied gas and stores tank, oil liquefied gas stores tank and is arranged on boom hoisting, boom hoisting is provided with and can gathers the load sensor that oil liquefied gas stores tank weight data, load sensor is connected to data collecting instrument.
Described temperature sensor is connected to data collecting instrument by electric thermo-couple temperature compensation block.
Described temperature sensor is K type thermocouple temperature sensor, electric thermo-couple temperature compensation block is the K type electric thermo-couple temperature compensation block of 16 passages, described test block tray bottom is provided with through hole, the thermocouple wire of K type thermocouple temperature sensor is drawn from described through hole, and is connected with the compensating line of K type electric thermo-couple temperature compensation block.
Space between described infrared generator and test bed framework, and be provided with heat-barrier material between asphalt test block and test block pallet.
A kind of bituminous pavement infrared heating test method, comprises the following steps:
1) asphalt test block is placed on test block pallet, and several temperature sensors are arranged in surface and the inside of asphalt test block;
2) distance between the infrared radiation face regulating asphalt test block upper surface and infrared generator;
3) oil liquefied gas air intake control valve is opened to 2/3 of limit aperture, open frequency conversion fan blower, start infrared generator to heat asphalt test block, infrared radiation flow sensor gathers infrared generator infrared radiation amount, and the temperature sensor simultaneously on asphalt test block gathers the temperature of asphalt test block upper surface and inside;
4) aperture of L. P. G gas control valve is regulated, and within the scope of 20Hz ~ 50Hz, the speed-frequency of frequency conversion fan blower is reduced gradually by gradient, when temperature sensor detects that asphalt test block surface temperature is 160 DEG C ~ 180 DEG C, when in asphalt test block, the temperature of 30 ~ 40mm depth reaches 70 DEG C ~ 100 DEG C, stop heating, record heat time and amount of consumed gas, namely complete bituminous pavement infrared heating test method.
Described step 1) in arrange temperature sensor time, set temperature sensor in the heart in the diagonal line of asphalt test block and infrared generator opposite face, diagonally the equidistant depth of placement respectively in center is the temperature sensor of 10mm, 20mm, 30mm and 40mm on the diagonal, and temperature sensor is connected to data collecting instrument by electric thermo-couple temperature compensation block.
Described step 2) distance in infrared radiation face of medium pitch test block upper surface and infrared generator is within the scope of 10mm ~ 20mm.
Compared with prior art, during device experiment of the present invention, asphalt test block is placed on inside test block pallet, on asphalt test block and inside is provided with the some temperature sensors be connected with connection data Acquisition Instrument, data collecting instrument is connected with the computing machine for showing data, the edge of test block pallet is also provided with the infrared radiation sensor be connected with connection data Acquisition Instrument, infrared radiation amount can be gathered, the start and stop of infrared generator is controlled by infrared ray generator controller, oil liquefied gas air intake control valve controls the air inflow of oil liquefied gas, the air inflow of frequency conversion air compressor control air, make the efficiency of heating surface of asphalt test block high, unit simulation of the present invention is strong, be easy to operation, when utilizing heating by infrared radiation bituminous pavement, can road surface be made to reach the requirement of in-situ heat regeneration when gas quantity is minimum, and make work efficiency reach the highest.
Further, during heating by infrared radiation asphalt test block, can according to the temperature signal of temperature sensor feedback, utilize jacking gear to change the distance between asphalt test block and infrared generator, asphalt test block is enable to reach better heating effect, the too much heat avoiding bituminous pavement to absorb and carbonize or heat halfway problem.
Further, water jacket thermal insulator is placed on above jacking gear, inlet side water and the water outlet port of water jacket thermal insulator is connect respectively with water pipe, and the water pipe connecting water inlet port is connected with running water tap, water jacket thermal insulator is utilized to cool test block pallet, avoid heating by infrared radiation test block pallet and jacking gear, ensure that the reliability of whole device.
Further, utilize hanging apparatus to lift by crane oil liquefied gas and store tank, utilize load sensor to gather oil liquefied gas and store tank weight data to sending data collecting instrument to, the consumption of oil liquefied gas can be detected at the trial accurately, improve the accuracy that test is measured, maximum heating effect is obtained, economize energy with minimum consumption.
Further, infrared radiation flow sensor is connected to data collecting instrument by data line, temperature sensor is connected to data collecting instrument by electric thermo-couple temperature compensation block, temperature data when utilizing electric thermo-couple temperature compensation block can measure test more accurately, improve the precision of test, to engineering practice, there is better directive significance.
Further, at the trial, around asphalt test block and pallet and bottom be all covered with heat-barrier material, asphalt test block is placed on test block pallet, prevents the heat conduction of test block pallet to test block, impact test precision; Space around infrared generator and between test framework utilizes heat-barrier material jam-pack, prevents heat upwards to climb sharply, the circuit above destruction equipment and steam hose, improves reliability and the security of whole device.
Test method of the present invention utilizes infrared ray generator controller to control the start and stop of infrared generator, infrared radiation flow sensor gathers the infrared radiation amount of infrared generator, temperature sensor simultaneously on asphalt test block gathers the temperature of asphalt test block upper surface and inside, oil liquefied gas air intake control valve controls the air inflow of oil liquefied gas, the air inflow of frequency conversion air compressor control air, test method simulation of the present invention is strong, be easy to operation, when utilizing heating by infrared radiation bituminous pavement, can road surface be made to reach the requirement of in-situ heat regeneration when gas quantity is minimum, and make work efficiency reach the highest.
Further, asphalt test block upper surface center set temperature temperature sensor, asphalt test block diagonal line is equidistantly provided with the temperature sensor of different depth, such layout temperature sensor can react the thermograde of asphalt test block more intuitively, the accurate surface of reflection asphalt test block and the temperature of inner diverse location, make the result of test have directiveness, improve the reliability of test.
Accompanying drawing explanation
Fig. 1 is the structure schematic front view of apparatus of the present invention;
Fig. 2 is the structure schematic top plan view of apparatus of the present invention;
Fig. 3 a is the structural representation of test bed framework upper bracket, Fig. 3 b is the structural representation of test bed framework left support frame, Fig. 3 c is the structural representation of test bed framework right support frame, Fig. 3 d is the structural representation of test bed framework crossbeam, wherein, 5-1-upper bracket, 5-2-right support frame, 5-3-front beam, 5-4-rear cross beam, 5-5-left support frame;
Fig. 4 is the schematic top plan view of test block pallet;
Fig. 5 is the layout schematic diagram of temperature sensor;
Fig. 6 is the thetagram of process of the test medium pitch test block different depth;
Fig. 7 is the curve map of the amount of infrared radiation that process of the test intermediate infrared radiation flow sensor gathers;
Wherein, 1-infrared ray generator controller, 2-oil liquefied gas air intake control valve, 3-frequency conversion fan blower, 4-infrared generator, 5-test bed framework, 6-asphalt test block, 7-test block pallet, 8-water jacket thermal insulator, 9-jacking gear, 10-load sensor, 11-oil liquefied gas store tank, 12-infrared radiation flow sensor, 13-electric thermo-couple temperature compensation block, 14-data collecting instrument, 15-computing machine.
Embodiment
Below in conjunction with specific embodiment and Figure of description, the present invention is further explained.
See Fig. 1 and Fig. 2, the inventive system comprises infrared ray generator controller 1, oil liquefied gas air intake control valve 2, frequency conversion fan blower 3, infrared generator 4, test bed framework 5, test block pallet 7, water jacket thermal insulator 8, jacking gear 9, load sensor 10, oil liquefied gas storage tank 11, infrared radiation flow sensor 12, electric thermo-couple temperature compensation block 13, data collecting instrument 14 and computing machine 15, wherein, infrared ray generator controller 1 controls the start and stop of infrared generator 4; Oil liquefied gas air intake control valve 2 controls the air inflow of oil liquefied gas; Frequency conversion fan blower 3 controls the air inflow of air; Asphalt test block 6 is located at when testing on test block pallet 7, is plugged with thermal insulation material glass silk flosssilk wadding and plays thermal insulation between test block pallet 7 and asphalt test block 6; Water jacket thermal insulator 8 has two interfaces, and one taps into water pipe, another connected water outlet pipe; Jacking gear 9 changes the distance between asphalt test block 6 and infrared generator 4 by the shake of handwheel; The surface of asphalt test block 6 and inside arrange 16 temperature sensors altogether, and temperature sensor is SMD thermocouple temperature sensor.The thermocouple wire of temperature sensor is connected by master-slave socket with K type thermocouple compensation, thermocouple compensation connects electric thermo-couple temperature compensation block 13, then electric thermo-couple temperature compensation block 13 and data collecting instrument 14 is connected with the data line of 21 pins, data collecting instrument 14 adopts model to be the data collecting instrument of the eDAQlite of HBM, and directly carry out connecting communication with computing machine 15 by the netting twine of RJ45 communication port, energy collecting temperature is installed in computing machine 15 and carries out the catmanAP software of Data Post.
See Fig. 3 a ~ Fig. 3 d, the upper bracket 5-1 of dismountable test bed framework is used for placing infrared generator 4, and is respectively welded with draw-in groove on four angles of upper bracket 5-1, is used for fixing restriction infrared generator 4.Test bed framework 5 is made up of five parts: upper bracket 5-1, right support frame 5-2, left support frame 5-5, front beam 5-3 and rear cross beam 5-4.Infrared generator 4 is placed on upper bracket 5-1, left and right bracing frame and forward and backward crossbeam are bolted, and upper bracket is directly enclosed within left and right bracing frame, and whole framework is easy to dismounting, convenient transport, and can also storage space be saved time idle.Jacking gear 9 comes lifting or decline by shake hand screw rod, and object regulates the distance between infrared generator 4 and asphalt test block 6 upper surface.Water jacket thermal insulator 8 is that stainless steel material is welded into, and object is used to prevent the direct radiation heating jacking gear 9 of infrared ray, avoids the support strength affecting jacking gear 9.
Infrared generator 4 heats a kind of alloy network grid material by burning petroleum liquefied gas to launch infrared ray, and oil liquefied gas is stored in oil liquefied gas and stores in tank 11.Temperature sensor is all K type thermalcouple type temperature sensor, the transmission line of K type thermocouple temperature sensor is connected by thermopair master-slave socket with K type thermocouple compensation, and K type thermocouple compensation is connected with the electric thermo-couple temperature compensation block 13 of 16 passages by thermopair public plug.
The model that data collecting instrument 14 adopts is the SoMateDAQlite Acquisition Instrument of HBM series, and by the netting twine with RJ45 connector, is directly connected with the RJ45 socket of computing machine 15, information communication between then being undertaken by ICP/IP protocol.What load sensor adopted is strain gauge load cell, and model is TJL-1, and range is 500N, and the model that infrared radiation flow sensor 12 adopts is HT-50-C-M20, and the size of asphalt test block 6 is 300x300x50mm.
See Fig. 4, the stainless steel welded one-tenth of test block pallet 7, and on the edge of test block pallet 7, be drilled with the bolt hole of a M20, object is used to install the infrared radiation flow sensor 12 detecting infrared radiation amount, and also having in the bottom of test block pallet 7 central through hole that diameter is 40mm, object is used to wear temperature sensor lead.At the trial, asphalt test block is placed on pallet, and in order to prevent the heat conduction of pallet to test block, thus around asphalt test block and pallet and bottom be all covered with heat-barrier material glass fibre.
See Fig. 5, the layout of temperature sensor with the temperature on the surface and inner diverse location of correctly reflecting testpieces for target, the side relative with heating by infrared radiation plate is heated side, the side relative with water jacket thermal insulator is non-heated side, temperature sensor is laid in heated side surface and the different depth place, distance heated side surface of asphalt test block respectively, and heated side and non-heated side are all square.During the sensor arranged, make a call to a through hole from the diagonal line point of intersection of non-heated side, then the contact of thermocouple temperature sensor is drawn from this through hole, lay the first temperature sensor 6-1 at the diagonal line near intersections place of heated side.When heating by infrared radiation asphalt test block, in order to measure the real time temperature on testpieces surface, also consider influence factor and the boundary effect of heating, on each 1/4th linea angulatas of non-heated side, 30 ~ 40mm of being often separated by bores a 10mm respectively, 20mm, 30mm, the blind hole that 40mm is dark, and it is different at a distance of the equidistant hole depth of central point, then in the blind hole of the inner different depth of asphalt test block, 15 temperature sensors are arranged, from near depth to center is the blind hole of 10mm, by arranged clockwise, 10mm in asphalt test block respectively, 20mm, 30mm, 1/4th linea angulatas at 40mm different depth place arrange 3, 4 and 4 thermocouple temperature sensors, and number consecutively second ~ 16 temperature sensor 6-2 ~ 6-16, such layout temperature sensor can react the thermograde of asphalt test block more intuitively.
The concrete operation step of the inventive method is as follows:
1) first couple together by the various piece of cross round head screw by test bed framework 5, then infrared generator 4 is placed in the draw-in groove above test bed framework 5, following heat-barrier material glass silk flosssilk wadding is the space heat-barrier material glass silk floss jam-pack around infrared generator 4 and between test bed framework 5, in order to prevent heat from upwards climbing sharply, the circuit above destruction equipment and steam hose;
2) and then jacking gear 9 being placed on the crossbeam of test bed framework 5, and fixing with bolt, regulating the height of jacking gear 9 to suitable position by rotating rocking arm;
3) according to the arrangement requirement of the design for temperature sensor of asphalt test block 6,16 thermocouple temperature sensors of asphalt test block inside are arranged;
4) the asphalt test block 6 that thermocouple temperature sensor arranges is placed into inside test block pallet 7, and heat-barrier material glass silk flosssilk wadding is laid on the face that asphalt test block 6 contacts with test block pallet 7, and the K type thermocouple wire of thermocouple temperature sensor is drawn from the through hole be reserved in bottom test block pallet 7, be connected with K type thermocouple compensation;
5) and then K type thermocouple compensation is connected with electric thermo-couple temperature compensation block 13, and infrared radiation flow sensor 12 is arranged on test block pallet 7 edge, then connect electric thermo-couple temperature compensation block 13 and eDAQlite data collecting instrument 14 with the data line of 21 pins;
6) water jacket thermal insulator 8 is placed on above jacking gear 9, connects inlet side water and the water outlet port of water jacket thermal insulator 8 with water pipe respectively, and the water pipe connecting water inlet port is connected with running water tap;
7) the test block pallet 7 being placed with asphalt test block 6 is placed into above water jacket thermal insulator 8;
8) connect the oil liquefied gas air intake control valve 2 of infrared generator 4 with steam hose, and connect infrared ray generator controller 1 with the power source wire of controller, and connect with the mains, open the button of charging on infrared ray generator controller 1, charge;
9) and then the steam hose other end is connected to oil liquefied gas and stores the control valve port of tank 11, and to sling oil liquefied gas storage tank 11 with load sensor 10, its signal transmssion line is received on eDAQlite data collecting instrument 14;
10) connect 26 needle moulds plan PORT COM of eDAQlite data collecting instrument 14 with the communication terminal of the data line of 26 pins, switch on power, so far a whole set of test unit has connected;
11) testing tool debugging, will test the working condition of device after test unit installs, whether the serviceability of testing each instrument is stablized;
12), after having debugged, disconnect the power supply of all devices, adjust the distance between asphalt test block upper surface and infrared radiation face by jacking gear 9;
13) power supply of all devices is connected, open oil liquefied gas air intake control valve 2, then stir the start button on infrared ray generator controller 1, show with the testing software that computing machine 15 is installed and record the data of whole process of the test, and aftertreatment is carried out to test figure;
14) first set maximum speed frequency and the 40Hz ~ 50Hz of frequency conversion fan blower 3 and the valve port opening of oil liquefied gas air intake control valve 2 is transferred to 2/3rds of maximum opening, then keep the distance in asphalt test block 6 upper surface and infrared radiation face within the scope of 10mm ~ 20mm, and then infrared generator 4 is opened, the data that moment observation test software shows, when surface temperature reaches 130 DEG C ~ 150 DEG C, by reducing the speed-frequency of frequency conversion fan blower 3 and the air inflow of air gradually by certain gradient within the scope of 20Hz ~ 50Hz, reduce the intensity of amount of infrared radiation, the too much heat preventing bituminous pavement from absorbing and carbonizing, when the temperature of 30 ~ 40mm depth of asphalt test block reaches 70 DEG C ~ 100 DEG C, and surface temperature is no more than 180 DEG C usually, stops heating, record heat time and amount of consumed gas, repeat above-mentioned operation, the valve port opening of oil liquefied gas air intake control valve 2 is regulated by certain opening gradient, when surface temperature reaches 160 DEG C ~ 180 DEG C, by reducing the speed-frequency of frequency conversion fan blower 3 and the air inflow of air gradually by certain gradient within the scope of 20Hz ~ 50Hz, reduce the intensity of amount of infrared radiation, the too much heat preventing bituminous pavement from absorbing and carbonizing, eventually pass the comparison under data processing and various test condition, find out a kind of most effective, embodiment that heating effect is best.
Fig. 6 is the temperature variation of process of the test medium pitch test block different depth in specific embodiment, wherein curve is followed successively by asphalt test block skin temperature profile from top to bottom, the temperature curve of the 10mm degree of depth in asphalt test block, the temperature curve of the 20mm degree of depth in asphalt test block, the temperature curve of the 40mm degree of depth in the temperature curve of the 30mm degree of depth and asphalt test block in asphalt test block, the temperature curve on surface is the curve map of the temperature variation on heating process medium pitch block surface, object is the temperature in order to understand surface in test heating process in time, by regulating the rotating speed of fan blower, the valve port size of oil liquefied gas air intake control valve and the distance between radiating surface and asphalt blocks surface or wherein two or three, make the temperature in order to asphalt blocks surface pitch can not be burnt higher than 180 DEG C or higher, in asphalt blocks, the temperature curve of the 10mm degree of depth is a curve of the inner 10mm depth temperature change of heated side asphalt blocks in heating process, the similar trend of other measuring point curve in the plane of this degree of depth and this curve, object understands in the temperature conduction speed of unit interval internal surface temperature to this degree of depth 10mm to observe, wherein, the temperature on surface changes along with heating power change, in asphalt blocks, the temperature curve of the 20mm degree of depth is a curve of the inner 20mm depth temperature change of heated side asphalt blocks in heating process, the similar trend of other measuring point curve in the plane of this degree of depth and this curve, object understands in the temperature conductivity of unit interval internal surface temperature to this degree of depth 20mm to observe, in asphalt blocks, the temperature curve of the 30mm degree of depth is a curve of the inner 30mm depth temperature change of heated side asphalt blocks in heating process, the similar trend of other measuring point curve in the plane of this degree of depth and this curve, object understands in the temperature conductivity of unit interval internal surface temperature to this degree of depth 30mm to observe, in asphalt blocks, the temperature curve of the 40mm degree of depth is a curve of the inner 40mm depth temperature change of heated side asphalt blocks in heating process, the similar trend of other measuring point curve in the plane of this degree of depth and this curve, object understands in the temperature conductivity of unit interval internal surface temperature to this degree of depth 40mm to observe, wherein, charing is burnt in order to not make the temperature on surface too high, do not limit and the rotating speed changing fan blower, the distance of the family on the valve port size of oil liquefied gas air intake control valve and radiating surface and asphalt blocks surface or wherein two or three, in this example, when the surface temperature of asphalt blocks reaches about 180 DEG C, close infrared radiation device, when reaching the first gradient etc. surface temperature, open infrared radiation device, continuing effects on surface carries out heating until temperature reaches about 180 DEG C, close infrared radiation device, repeat above-mentioned action, until the temperature at asphalt blocks internal depth 40mm place reaches 80 DEG C ~ 100 DEG C, stop heating.By the data and curves figure gathered, can understand the variation tendency of the thermograde under different depth accurately, the test for next step serves directiveness effect.
Fig. 7 is the variation diagram of the amount of infrared radiation that process of the test intermediate infrared radiation flow sensor gathers, the variation diagram curve of infra-red radiation generators radiant quantity in rear three sections of processes that what in figure, curve represented is, due within for the previous period, infra-red radiation generators device is also unstable.After opening infra-red radiation generators, when the rotating speed of certain fan blower, the valve port of oil liquefied gas gas admittance valve and the distance between infrared radiation transmitter and asphalt blocks surface, after the temperature on asphalt blocks surface reaches 180 DEG C, close infra-red radiation generators, now radiant quantity arrives the high point of test, and then radiant quantity sharply declines, and the amplitude of curve changes along with the process of heating.Object understands the relation under radiant quantity and different depth between asphalt blocks thermograde, for the design optimizing infrared generator equipment provides certain theoretical foundation to instruct.This test unit also can control infrared generator and amount of infrared radiation in several ways, finally reaches test expectation value.Its contact of K type thermocouple temperature sensor used in test is embedded in the inside of asphalt test block, when gas quantity is certain, the temperature variation of each measuring point can be reflected intuitively on computer software interface, and adjust throughput accordingly according to the situation of change of temperature, after passing through repeatedly tentatively test, sum up a kind of most effective, scheme that heating effect is best, measured test figure conclusion can play theoretical direction effect to practice.
Simulation of the present invention is strong, be easy to operation, when utilizing heating by infrared radiation bituminous pavement, can road surface be made when gas quantity is minimum to reach the requirement of in-situ heat regeneration, and make work efficiency reach the highest, record test figure conclusion and can play theoretical direction effect to practice.
Claims (10)
1. a bituminous pavement infrared heating test unit, it is characterized in that, comprise test bed framework (5), test bed framework (5) is provided with infrared generator (4), infrared generator (4) is connected with infrared ray generator controller (1), oil liquefied gas air intake control valve (2) and frequency conversion fan blower (3), oil liquefied gas air intake control valve (2) is connected to L. P. G source of the gas, frequency conversion fan blower (3) connects air-source, the positive lower end of infrared generator (4) is provided with the test block pallet (7) for placing asphalt test block (6), test block pallet (7) is provided with the infrared radiation flow sensor (12) that can gather infrared generator (4) infrared radiation amount, several temperature sensors are provided with in asphalt test block (6) during test, described temperature sensor and infrared radiation flow sensor (12) are connected to data collecting instrument (14), data collecting instrument (14) is connected to the computing machine (15) that can show test figure.
2. a kind of bituminous pavement infrared heating test unit according to claim 1, it is characterized in that, described test bed framework (5) is provided with jacking gear (9), described test block pallet (7) is fixedly installed on jacking gear (9), can be adjusted the distance in asphalt test block (6) upper surface and infrared radiation face by described jacking gear (9).
3. a kind of bituminous pavement infrared heating test unit according to claim 2, is characterized in that, is provided with water jacket thermal insulator (8) between described test block pallet (7) and the table top of jacking gear (9).
4. a kind of bituminous pavement infrared heating test unit according to claim 1, it is characterized in that, described oil liquefied gas air intake control valve (2) is connected to oil liquefied gas and stores tank (11), oil liquefied gas stores tank (11) and is arranged on boom hoisting, boom hoisting is provided with and can gathers the load sensor (10) that oil liquefied gas stores tank (11) weight data, load sensor (10) is connected to data collecting instrument (14).
5. a kind of bituminous pavement infrared heating test unit according to claim 1, is characterized in that, described temperature sensor is connected to data collecting instrument (14) by electric thermo-couple temperature compensation block (13).
6. a kind of bituminous pavement infrared heating test unit according to claim 5, it is characterized in that, described temperature sensor is K type thermocouple temperature sensor, electric thermo-couple temperature compensation block (13) is the K type electric thermo-couple temperature compensation block of 16 passages, described test block pallet (7) bottom is provided with through hole, the thermocouple wire of K type thermocouple temperature sensor is drawn from described through hole, and is connected with the compensating line of K type electric thermo-couple temperature compensation block.
7. a kind of bituminous pavement infrared heating test unit according to claim 1, it is characterized in that, space between described infrared generator (4) and test bed framework (5), and be provided with heat-barrier material between asphalt test block (6) and test block pallet (7).
8. a bituminous pavement infrared heating test method, is characterized in that, comprises the following steps:
1) asphalt test block (6) is placed on test block pallet (7), and several temperature sensors is arranged in surface and the inside of asphalt test block (6);
2) distance between the infrared radiation face regulating asphalt test block (6) upper surface and infrared generator (4);
3) oil liquefied gas air intake control valve (2) is opened to 2/3 of limit aperture, open frequency conversion fan blower (3), start infrared generator (4) to heat asphalt test block (6), infrared radiation flow sensor (12) gathers infrared generator (4) infrared radiation amount, and the temperature sensor simultaneously on asphalt test block (6) gathers the temperature of asphalt test block (6) upper surface and inside;
4) aperture of L. P. G gas control valve (2) is regulated, and within the scope of 20Hz ~ 50Hz, the speed-frequency of frequency conversion fan blower (3) is reduced gradually by gradient, when temperature sensor detects that asphalt test block (6) surface temperature is 160 DEG C ~ 180 DEG C, when in asphalt test block (6), the temperature of 30 ~ 40mm depth reaches 70 DEG C ~ 100 DEG C, stop heating, record heat time and amount of consumed gas, namely complete bituminous pavement infrared heating test method.
9. a kind of bituminous pavement infrared heating test method according to claim 8, it is characterized in that, described step 1) in arrange temperature sensor time, set temperature sensor in the heart in the diagonal line of asphalt test block (6) and infrared generator (4) opposite face, diagonally the equidistant depth of placement respectively in center is the temperature sensor of 10mm, 20mm, 30mm and 40mm on the diagonal, and temperature sensor is connected to data collecting instrument (14) by electric thermo-couple temperature compensation block (13).
10. a kind of bituminous pavement infrared heating test method according to claim 8, it is characterized in that, described step 2) distance in the infrared radiation face of medium pitch test block (6) upper surface and infrared generator (4) is within the scope of 10mm ~ 20mm.
Priority Applications (1)
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| CN105891253A (en) * | 2016-05-19 | 2016-08-24 | 中南大学 | Bell-type biomass microwave-pyrolysis testing device |
| CN107202877A (en) * | 2017-07-04 | 2017-09-26 | 长安大学 | A kind of bridge asphalt pavement bulge forms lab simulation experimental rig and method |
| CN107870220A (en) * | 2017-09-21 | 2018-04-03 | 杭州东方雨虹建筑材料有限公司 | The test device and method of testing of asphalt adhesive spill-out |
| CN108151898A (en) * | 2018-01-05 | 2018-06-12 | 重庆大学 | A kind of steel box girder bridge simulation temperature measurement device |
| CN108387603A (en) * | 2018-04-28 | 2018-08-10 | 长安大学 | A kind of infrared heating test device and test method |
| CN108872301A (en) * | 2018-04-19 | 2018-11-23 | 长安大学 | A kind of Warm up Asphalt Pavement with Hot Air experimental rig and test method |
| CN109507223A (en) * | 2018-12-07 | 2019-03-22 | 谭丽娟 | A kind of building materials volatility detection method for simulating geothermal environment |
| CN110132349A (en) * | 2019-05-06 | 2019-08-16 | 山东大学 | The system and method for prestressed concrete beam temperature gradient identification effective prestress |
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| CN110196267A (en) * | 2019-05-13 | 2019-09-03 | 安徽建筑大学 | A kind of test method of the infrared road detection apparatus based on transmitting electromagnetism or microwave |
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| CN105891253A (en) * | 2016-05-19 | 2016-08-24 | 中南大学 | Bell-type biomass microwave-pyrolysis testing device |
| CN107202877A (en) * | 2017-07-04 | 2017-09-26 | 长安大学 | A kind of bridge asphalt pavement bulge forms lab simulation experimental rig and method |
| CN107202877B (en) * | 2017-07-04 | 2019-07-26 | 长安大学 | A kind of bridge asphalt pavement bulge forms indoor simulation experimental rig and method |
| CN107870220A (en) * | 2017-09-21 | 2018-04-03 | 杭州东方雨虹建筑材料有限公司 | The test device and method of testing of asphalt adhesive spill-out |
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| CN108872301A (en) * | 2018-04-19 | 2018-11-23 | 长安大学 | A kind of Warm up Asphalt Pavement with Hot Air experimental rig and test method |
| CN108387603A (en) * | 2018-04-28 | 2018-08-10 | 长安大学 | A kind of infrared heating test device and test method |
| CN109507223B (en) * | 2018-12-07 | 2020-12-15 | 君润智能科技(新沂)有限公司 | Building material volatility detection method for simulating geothermal environment |
| CN109507223A (en) * | 2018-12-07 | 2019-03-22 | 谭丽娟 | A kind of building materials volatility detection method for simulating geothermal environment |
| CN110132349A (en) * | 2019-05-06 | 2019-08-16 | 山东大学 | The system and method for prestressed concrete beam temperature gradient identification effective prestress |
| CN110132349B (en) * | 2019-05-06 | 2021-11-23 | 山东大学 | System and method for identifying effective prestress of prestressed concrete beam through temperature gradient |
| CN110186947A (en) * | 2019-05-13 | 2019-08-30 | 长安大学 | Pavement recycling experimental facilities based on infra-red radiation and hot wind collaboration heating |
| CN110196267A (en) * | 2019-05-13 | 2019-09-03 | 安徽建筑大学 | A kind of test method of the infrared road detection apparatus based on transmitting electromagnetism or microwave |
| CN110196267B (en) * | 2019-05-13 | 2021-06-29 | 安徽建筑大学 | Test method of infrared road detection device based on electromagnetic or microwave emission |
| CN110186947B (en) * | 2019-05-13 | 2021-09-21 | 长安大学 | Road surface regeneration experimental facilities based on infrared radiation and hot-blast collaborative heating |
| CN110424230A (en) * | 2019-08-02 | 2019-11-08 | 浙江顺畅高等级公路养护有限公司 | Simulate the indoor infrared heating temperature detection device of in-situ heat regeneration bituminous pavement |
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