CN106770442A - Bituminous paving high temperature heat transfer performance measurement instrument - Google Patents
Bituminous paving high temperature heat transfer performance measurement instrument Download PDFInfo
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- CN106770442A CN106770442A CN201611170925.6A CN201611170925A CN106770442A CN 106770442 A CN106770442 A CN 106770442A CN 201611170925 A CN201611170925 A CN 201611170925A CN 106770442 A CN106770442 A CN 106770442A
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- hot plate
- cold drawing
- heat transfer
- high temperature
- measurement instrument
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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
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- Life Sciences & Earth Sciences (AREA)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a kind of bituminous paving high temperature heat transfer performance measurement instrument, purpose is that it is possible to carry out precise control to sample coupon clamping force, it is ensured that hot-fluid is uniformly transmitted downwards by test specimen upper table, simultaneously test when test specimen pick and place conveniently, the technical scheme for being used for：Including hollow overall outer framework, hot plate and cold drawing are disposed with from top to bottom in overall outer framework, it is sample coupon placement space between hot plate and cold drawing, the upper end of hot plate is fixed with screwfeed mechanism, the lower end of cold drawing is provided with clamping force measuring mechanism, the hot plate includes the fixed frame being connected with screwfeed mechanism, and heating plate is provided with fixed frame, and heating plate lower end is provided with soaking copper coin；Conduit is provided with the cold drawing, conduit is provided with water inlet and delivery port.
Description
Technical field
The invention belongs to Measured Results of Thermal Conductivity field, and in particular to a kind of bituminous paving high temperature heat transfer performance measurement instrument.
Background technology
Thermal conductivity factor is one of important parameter of reflection thermal conductivity of material, and road traffic asphalt concrete pavement conducts heat,
External walls of building is incubated pasting board, heat preservation of refrigeration storage interlayer, and the equipment such as laptop heat-dissipation copper pipe, kettle will consider in daily life
The wherein capacity of heat transmission of material.So, the Accurate Determining parameter is particularly important.
Conventional thermal conductive coefficient measuring instrument is clamped typically by mobile cold drawing to sample coupon, and due to operating personnel
The difference of sensation tends not to the size of precise control clamping force, also cannot accurately enter the measurement of line parameter.Additionally, traditional
Thermal conductivity measuring apparatus temperature is tended not to be accurately controlled, cause measuring result error larger.
The content of the invention
In order to solve the problems of the prior art, the present invention proposes that one kind can accurately be controlled to sample coupon clamping force
System, it is ensured that hot-fluid is uniformly transmitted downwards by test specimen upper table, can be accurately controlled to temperature, while test specimen during experiment
Pick and place convenient bituminous paving high temperature heat transfer performance measurement instrument.
In order to realize the above object the technical solution adopted in the present invention is：It is overall outer including hollow overall outer framework
Hot plate and cold drawing are disposed with from top to bottom in framework, are sample coupon placement space, the upper end of hot plate between hot plate and cold drawing
Screwfeed mechanism is fixed with, the lower end of cold drawing is provided with clamping force measuring mechanism, and the hot plate includes and screwfeed mechanism
Connected fixed frame, is provided with heating plate on fixed frame, heating plate lower end is provided with soaking copper coin, is set on soaking copper coin
There is temperature sensor, soaking copper coin includes the hot soaking copper coin of shield, and the center for protecting hot soaking copper coin is provided with through hole, is set in the through hole
Center calorimetric soaking copper coin is equipped with, space is provided between center calorimetric soaking copper coin and the through hole side for protecting hot soaking copper coin；It is described
Conduit is provided with cold drawing, conduit is provided with water inlet and delivery port；The heating plate is connected with temperature control equipment, temperature control
Device include be sequentially connected PC, voltage output module, signal amplifier, relay, fuse and be connected with heating plate it is straight
Stream power supply.
The heating plate upper end is provided with asbestos heat-insulation layer.
The lower end of the hot plate is provided with the insulation construction for preventing hot plate from being radiated to surrounding, and sample coupon is placed into cold during experiment
On plate, insulation construction can be covered on sample coupon.
Heat-insulating material peripheral board is provided with the outside of the insulation construction.
Conduit in the cold drawing uses double helix conduit, double helix conduit to use reverse-flow helical duct, including two
The cold drawing spiral tank that the hand of spiral and water (flow) direction are contrary.
Guide pillar is provided with the overall outer framework, the upper end both sides of hot plate are provided with the first guiding slotware, under cold drawing
End both sides are provided with the second guiding slotware, and the first guiding slotware and the second guiding slotware are slidably connected with guide pillar.
The clamping force measuring mechanism is S type pull pressure sensor.
The screwfeed mechanism is included along to the leading screw being arranged on overall outer framework, screw mandrel one end passes through bearing vertically
It is fixedly connected with hot plate, the other end is fixedly installed handwheel.
Compared with prior art, the present invention sets hot plate and cold drawing in overall outer framework, and hot plate is located at cold drawing upper end, examination
When testing sample coupon be located at cold drawing on, by screwfeed mechanism drive hot plate to bottom offset, and by sample coupon be pressed on hot plate and
Between cold drawing, sample coupon pressure transmission gives clamping force measuring mechanism, obtains pressure information and adjusts suitable clamping force, sets
The temperature of hot plate and cold drawing, measurement is heated by heating plate to sample coupon, transfers heat to sample coupon, treats conduction process
During in stable state, the temperature difference of the upper and lower surface of the asphalt blocks detected by temperature sensor, and detection
The data such as power supply heating power are processed, that is, try to achieve the thermal conductivity factor of asphalt blocks.The present invention passes through clamping force measuring mechanism energy
It is enough that precise control is carried out to sample coupon clamping force, it is ensured that hot-fluid is uniformly transmitted downwards by test specimen upper table, and sample coupon is located at
On cold drawing, hot plate conveniently picks and places sample coupon by screwfeed mechanism vertical displacement.
Further, hot plate transmits downwards heat by soaking copper coin, using center calorimetric soaking copper coin and the hot soaking copper of shield
Plate carries out to sample coupon main heating and auxiliary heat effect respectively, it is ensured that the even heat of hot plate passes to the upper of sample coupon
Surface, and good contact can be kept with sample coupon surface.
Further, heating plate upper end sets asbestos heat-insulation layer, and asbestos heat-insulation layer is close to heating plate, can effectively prevent heat
Amount is communicated up.
Further, soaking copper coin surface is furnished with temperature sensor, can detect the surface temperature of hot plate, and can be to shield heat
Soaking copper plate temperature is fed back, and then realizes the temperature control of hot plate.
Further, the lower end of hot plate is provided with the insulation construction for preventing hot plate from being radiated to surrounding, and sample coupon is put during experiment
Put on cold drawing, insulation construction can be covered on sample coupon, can effectively reduce hot plate and sample coupon to surrounding dissipated heat.
Further, the conduit in cold drawing uses double helix conduit, double helix conduit to use reverse-flow helical duct, including two
The cold drawing spiral tank that the individual hand of spiral and water (flow) direction are contrary, thermostatted water is flowed into by water inlet, by the spiral water of cold drawing
Groove is flowed back to by delivery port, and this structure causes that adjacent tank current are in opposite direction, and the temperature for substantially reducing cold drawing surface is uneven
Even property.
Further, the similar guide pin bushing of effect of slotware is oriented to, when hot plate is moved up and down, the guiding slotware of hot plate both sides is driven
Slided up and down along the guide pillar on general frame, play guiding and increase the rigid effect of hot plate structure, simple structure, processing side
Just.Also respectively there is a guiding slotware cold drawing both sides, and its effect mainly ensures to clamp the rigidity of force measuring device, and to cold drawing
Certain guide effect is played in thin tail sheep movement.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of hot plate；
Fig. 3 is the structural representation of cold drawing；
Fig. 4 is the structural representation for being oriented to slotware；
Fig. 5 is the assembling structure schematic diagram of cold drawing and hot plate；
Wherein, 1. overall outer framework, 2. the first guiding slotware, 3. hot plate, 4. insulation construction, 5. cold drawing, 6. screwfeed
Mechanism, 7. bearing, 8. sample coupon placement space, 9. heat-insulating material peripheral board, 10. clamping force measuring mechanism, the 11. hot soaking copper of shield
Plate, 12. spaces, 13. center calorimetric soaking copper coins, 14. water inlets, 15. delivery ports, 16. cold drawing spiral tanks, 17. second are led
To slotware.
Specific embodiment
The present invention is further explained with reference to specific embodiment and Figure of description, but should not be managed
Solve as above-mentioned subject area of the invention is only limitted to following embodiments.Without departing from the idea case in the present invention described above, root
According to ordinary skill knowledge and customary means, various replacements and change are made, protection scope of the present invention all should be included in
It is interior.
Referring to Fig. 1, the invention mainly comprises overall outer framework 1, hot plate 3, insulation construction 4, cold drawing 5, screwfeed mechanism
6th, clamping force measuring mechanism 10, insulation construction of the present invention 4 is the outer protecting heat insulating layer of asbestos, and clamping force measuring mechanism 10 draws for S types
Pressure sensor, hot plate 3 is located at instrument top, and cold drawing 5 is located at lower section, and sample coupon placement space is formed between hot plate 3 and cold drawing 5
8, the top of hot plate 3 is connected with screwfeed mechanism 6, it is possible to moved up and down along overall outer framework 1, lower section and the drawing of cold drawing 5
Pressure sensor is connected.Screwfeed mechanism 6 is included along to the leading screw being arranged on overall outer framework 1, screw mandrel one end leads to vertically
Cross bearing 7 to be fixedly connected with hot plate 3, the other end is fixedly installed handwheel.After sample coupon is put into, made by rotary top handwheel
Hot plate structure is moved down, and continues rotation hand wheel, and pressure is applied to sample coupon, and pressure data is shown by computer display interface,
The size of clamping force, clamping force suffered by precise control sample coupon are adjusted by handwheel simultaneously.
Guide pillar is provided with overall outer framework 1, the upper end both sides of hot plate 3 are provided with the first guiding slotware 2, under cold drawing 5
End both sides are provided with the second guiding slotware 17, and the first guiding slotware 2 and second is oriented to slotware 17 and is slidably connected with guide pillar.
Referring to Fig. 2, hot plate 3 includes the fixed frame being connected with screwfeed mechanism 6, and heating is provided with fixed frame
Piece, heating plate upper end is provided with asbestos heat-insulation layer, and heating plate lower end is provided with soaking copper coin, and soaking copper coin includes the hot soaking copper of shield
Plate 11, the center for protecting hot soaking copper coin 11 is provided with through hole, and center calorimetric soaking copper coin 13, center calorimetric soaking are provided with through hole
Space 12 is provided between copper coin 13 and the through hole side for protecting hot soaking copper coin 11, the lower end of hot plate 3 is provided with prevents hot plate 3 to surrounding
The insulation construction 4 of radiating, sample coupon is placed on cold drawing 5 during experiment, and insulation construction 4 can be covered on sample coupon, insulation construction 4
Outside be provided with heat-insulating material peripheral board 9, be provided with temperature sensor on soaking copper coin.Heating plate is connected with temperature control dress
Put, temperature control equipment include be sequentially connected PC, voltage output module, signal amplifier, relay, fuse and with heating
The dc source of piece connection, by the PC equipped with Labview softwares, temperature sensor, voltage output module, amplifier, relay
Device, fuse and Switching Power Supply carry out temperature control.Concretely comprise the following steps, controlled using pulsewidth modulation (PWM) by Labview softwares
The method of circuit processed, by the open and close of voltage output module, relay and then controlling switch power supply, regulation heating plate
Power, makes the temperature of the pitch upper surface that hot plate contacts reach the temperature of setting.The algorithm that temperature control is used：To improve pitch
The operating efficiency of road surface high temperature heat transfer performance measurement instrument, the instrument uses following control algolithm：Making and gathered on soaking copper coin
Temperature be t1, on cold drawing gather temperature be t2, work as t1-t2>At 5 DEG C, using heating with full power, will dc source work(
Rate modulation is maximum, when t1-t2≤5 DEG C, carries out carrying out temperature control to hot plate using PID.
Referring to Fig. 3, conduit is provided with cold drawing 5, conduit is provided with water inlet 14 and delivery port 15, and the conduit in cold drawing 5 is adopted
Use double helix conduit, double helix conduit uses reverse-flow helical duct, including two hands of spiral and water (flow) direction are contrary
Cold drawing spiral tank 16.
Referring to Fig. 1, the course of work of the invention：Can by the screwfeed mechanism 6 being rotatably connected on overall outer framework 1
To realize the lifting of hot plate structure, when hot plate 3 is raised to correct position, sample coupon is put into the sample that hot plate 3 and cold drawing 5 are formed
In part placement space 8, then opposite direction turn screwfeed mechanism 6 compresses sample coupon, and in compaction process, sample coupon is by pressure
The clamping force measuring mechanism 10 for being connected to the lower section of cold drawing 5 is passed to, suitable folder can be observed and adjusted by display interface
Clamp force, temperature is set to hot plate 3 and cold drawing 5, and equitemperature reaches stable state, it is possible to by being calculated leading for sample coupon
Hot coefficient.
Referring to Fig. 2, hot plate is made up of heating plate, fixed frame, center calorimetric soaking copper coin 13 and the hot soaking copper coin 11 of shield,
Center calorimetric soaking copper coin 13 is the rectangular configuration of 150mmx150mm, and it is the three-back-shaped of 300mmx300mm to protect hot soaking copper coin 11
Structure, space 12 is provided between center calorimetric soaking copper coin 13 and the hot soaking copper coin 11 of shield.The lower end of hot plate 3 is formed around insulation
Structure 4, can effectively reduce hot plate 3 to surrounding dissipated heat, there is heating plate and asbestos heat-insulation layer, asbestos insulation inside hot plate 3
Layer is close to heating plate, can effectively prevent heat from being communicated up.Temperature sensor is arranged on the soaking copper coin below heating plate,
It is used to measure the temperature of main heating plate and guarded hot plate, feeds back to main frame, completes the control to guarded hot plate temperature.The top of hot plate 3 connects
A leading screw with handwheel is connect, the lifting of hot plate 3 can be adjusted by rotation hand wheel, and the both sides of hot plate 3 respectively have one to rise
First guiding slotware 2 of guide effect, can move up and down to hot plate 3 and play guide effect, while hot plate knot can also be improved
The integral rigidity of structure.
Referring to Fig. 3, cold drawing 5 is located at integrally-built lower section, and the left and right sides is respectively provided with a constant temperature water entrance 14, cold drawing
5 internal structures are double helix conduit, including two cold drawing spiral tanks 16, cold drawing spiral tank 16 is led to using reverse-flow spiral
Road, thermostatted water is flowed into by water inlet 14, is flowed back to by delivery port 15 by cold drawing spiral tank 16, and this design causes adjacent tank
Water (flow) direction is opposite so that turnover stream close to, in the opposite direction, substantially reduce the temperature unevenness on the surface of cold drawing 5, can make
The more uniform temperature of cold drawing 5.The both sides of cold drawing 5 are equally respectively provided with one second guiding slotware 17, can also be risen while increasing rigidity
To micro- guide effect, the bottom of cold drawing 5 connects a S type pull pressure sensor, when sample coupon is subject to the pressure that hot plate 3 applies, just
Can be delivered in the pull pressure sensor of the bottom of cold drawing 5 such that it is able to read the size of sample coupon pressure.
Referring to Fig. 4, it acts on similar guide pin bushing to be oriented to slotware, when hot plate 3 is moved up and down, drives the first of the both sides of hot plate 3
It is oriented to slotware 2 to be slided up and down along the guide pillar on overall outer framework 1, plays guiding and increase the rigid effect of hot plate structure, but its
Simple structure, it is easy to process.Also respectively there is one second guiding slotware 17 both sides of cold drawing 5, and its effect mainly ensures that clamping force is surveyed
The rigidity of measuring mechanism 10, and certain guide effect is played to the movement of the thin tail sheep of cold drawing 5.
Referring to Fig. 5, hot plate 3 is above, and cold drawing 5 is located at lower section, during test measurement, sample coupon is placed on cold drawing 5,
Hot plate 3 is moved down by screwfeed mechanism 6, insulation structure 4 is around playing function of heat insulation around sample coupon.
When sample coupon to be taken out, screwfeed mechanism 6 is reversely rotated, hot plate 3 rises, this structure can play adiabatic heat-insulation effect,
Taking for sample coupon, high insulating effect, simple structure can be facilitated again.
The present invention adjusts the lifting of hot plate structure by rotary apparatus top handwheel, after hot plate touches sample coupon, after
It is continuous to apply pressure, the size of pressure value is adjusted by data display interface, the method being capable of precise control clamping force size, operation
Simply, it is reliable.Additionally, apparatus structure is placed and taken out conveniently in upper cold drawing using hot plate in lower structure, and sample coupon, will not
Because the presence of heat insulation structure, and there is sample coupon and block the phenomenon that can not taken.
Claims (8)
1. a kind of bituminous paving high temperature heat transfer performance measurement instrument, it is characterised in that whole including hollow overall outer framework (1)
Hot plate (3) and cold drawing (5) are disposed with from top to bottom in external framework (1), are sample coupon between hot plate (3) and cold drawing (5)
Placement space (8), the upper end of hot plate (3) is fixed with screwfeed mechanism (6), and the lower end of cold drawing (5) is provided with clamping force measurement
Mechanism (10), the hot plate (3) includes the fixed frame being connected with screwfeed mechanism (6), and heating is provided with fixed frame
Piece, heating plate lower end is provided with soaking copper coin, and temperature sensor is provided with soaking copper coin, and soaking copper coin includes the hot soaking copper of shield
Plate (11), the center for protecting hot soaking copper coin (11) is provided with through hole, and center calorimetric soaking copper coin (13) is provided with the through hole, in
Space (12) is provided between heart calorimetric soaking copper coin (13) and the through hole side for protecting hot soaking copper coin (11)；Set in the cold drawing (5)
Conduit is equipped with, conduit is provided with water inlet and delivery port；The heating plate is connected with temperature control equipment, and temperature control equipment includes
The PC that is sequentially connected, voltage output module, signal amplifier, relay, fuse and the dc source being connected with heating plate.
2. a kind of bituminous paving high temperature heat transfer performance measurement instrument according to claim 1, it is characterised in that the heating
Piece upper end is provided with asbestos heat-insulation layer.
3. a kind of bituminous paving high temperature heat transfer performance measurement instrument according to claim 2, it is characterised in that the hot plate
(3) lower end is provided with the insulation construction (4) for preventing hot plate (3) from being radiated to surrounding, and sample coupon is placed into cold drawing (5) during experiment
On, insulation construction (4) can be covered on sample coupon.
4. a kind of bituminous paving high temperature heat transfer performance measurement instrument according to claim 3, it is characterised in that the insulation
Heat-insulating material peripheral board (9) is provided with the outside of structure (4).
5. a kind of bituminous paving high temperature heat transfer performance measurement instrument according to claim 1, it is characterised in that the cold drawing
(5) conduit in uses double helix conduit, double helix conduit to use reverse-flow helical duct, including two hands of spiral and current
Cold drawing spiral tank (16) that direction is contrary.
6. a kind of bituminous paving high temperature heat transfer performance measurement instrument according to claim 1, it is characterised in that the entirety
Guide pillar is provided with outer framework (1), the upper end both sides of hot plate (3) are provided with the first guiding slotware (2), the lower end two of cold drawing (5)
Side is provided with the second guiding slotware (17), and the first guiding slotware (2) and the second guiding slotware (17) are slidably connected with guide pillar.
7. a kind of bituminous paving high temperature heat transfer performance measurement instrument according to claim 1, it is characterised in that the clamping
Power measuring mechanism (10) is S type pull pressure sensor.
8. a kind of bituminous paving high temperature heat transfer performance measurement instrument according to claim 1, it is characterised in that the spiral
Feed mechanism (6) is including along to the leading screw being arranged on overall outer framework (1), screw mandrel one end passes through bearing (7) and hot plate vertically
(3) it is fixedly connected, the other end is fixedly installed handwheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170925.6A CN106770442B (en) | 2016-12-16 | 2016-12-16 | Instrument for measuring high-temperature heat transfer performance of asphalt pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170925.6A CN106770442B (en) | 2016-12-16 | 2016-12-16 | Instrument for measuring high-temperature heat transfer performance of asphalt pavement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106770442A true CN106770442A (en) | 2017-05-31 |
| CN106770442B CN106770442B (en) | 2023-02-28 |
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ID=58892091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611170925.6A Active CN106770442B (en) | 2016-12-16 | 2016-12-16 | Instrument for measuring high-temperature heat transfer performance of asphalt pavement |
Country Status (1)
| Country | Link |
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| CN (1) | CN106770442B (en) |
Cited By (2)
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| CN108426914A (en) * | 2018-03-20 | 2018-08-21 | 长安大学 | A kind of determining instrument of thermal coefficient and specific heat capacity |
| CN113376207A (en) * | 2021-06-07 | 2021-09-10 | 长安大学 | Over-and-under type coefficient of heat conductivity test instrument of constant temperature basin |
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| CN103469715A (en) * | 2013-09-26 | 2013-12-25 | 南京林业大学 | Design method of inflaming retarding scheme of tunnel bituminous pavement structure |
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| CN113376207A (en) * | 2021-06-07 | 2021-09-10 | 长安大学 | Over-and-under type coefficient of heat conductivity test instrument of constant temperature basin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106770442B (en) | 2023-02-28 |
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