CN109364814A - Operating method and its device are mixed and stirred in asphalt mixing plant vibration - Google Patents
Operating method and its device are mixed and stirred in asphalt mixing plant vibration Download PDFInfo
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- CN109364814A CN109364814A CN201811459721.3A CN201811459721A CN109364814A CN 109364814 A CN109364814 A CN 109364814A CN 201811459721 A CN201811459721 A CN 201811459721A CN 109364814 A CN109364814 A CN 109364814A
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- mixing
- agitating shaft
- cylinder
- stirring
- asphalt
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/75—Discharge mechanisms
- B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
- B01F35/7547—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
- B01F31/56—Mixers with shaking, oscillating, or vibrating mechanisms having a vibrating receptacle provided with stirring elements, e.g. independent stirring elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2215—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2216—Time, i.e. duration, of at least one parameter during the operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
- B01F2035/99—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/38—Mixing of asphalt, bitumen, tar or pitch or their ingredients
Abstract
The invention discloses a kind of vibrations of asphalt mixing plant to mix and stir operating method and its device.Asphalt mixing plant vibrating mixing device includes rack, mixes cylinder, damping device, mixes cylinder interior equipped with the first agitating shaft and the second agitating shaft.Operating method is mixed and stirred in asphalt mixing plant vibration, Step 1: to cylinder and the first agitating shaft is mixed and the second agitating shaft heats；Step 2: vibration excitor drives the first agitating shaft and the second stirring shaft vibration, cylinder vibration is mixed in vibrator drive；Step 3: discharging.Entirely the process of mixing and stirring mixes that cylinder heats simultaneously with agitating shaft, mixing cylinder and stirring, shaft vibration is controllable, Oscillation Amplitude is controllable to the present invention.The present invention be adapted to heat mix, warm mix, cold mixing, the kinds of processes such as plant-mix recycling, situ regeneration.The present invention is easy to promote and utilize, solves fine aggregate in asphalt and filler " granule " phenomenon, allows its abundant disperse.
Description
Technical field
The invention belongs to technical field of road engineering, it is related to a kind of asphalt mixing plant vibration and mixes and stirs operating method and its dress
It sets.
Background technique
With the development of China's road construction and research, according to related highway statistics and various regions Construction Practice experience table
Bright, the main problem that bituminous pavement shows is that the road surface as caused by local failure is gradually destroyed, and this destroy is often road
Early damages latter, in 2 years or several years are built up in face, and form is that crack, Moisture Damage, loose, pit slot and excessive vehicle are removed
Deng.Protective Measures of Bitumen Pavement Initial Damage is always a great problem of engineering circles, and the inhomogeneities of asphalt is road surface early damage
The main reason for, the uniformity degree of asphalt is directly related to the mechanical property and service life of bituminous pavement.
Asphalt as by pitch, gather materials, a kind of multiphase mixing material with specific gradation that filler, gap form
Material.Loose granular materials is coupled to an entirety by the cementing power of asphalt mastic, is anisotropic heterogeneous material
Material has apparent Particulate structures feature and nonlinear mechanics characteristic, and road application properties are not only gathered materials, the property of pitch
With the influence of the composition ratio of the two, also influenced by its internal composed structure.Wherein for voidage: U.S. SHRP plan
It is as best 4% that research achievement proposes that the voidage of asphalt under normal conditions should be controlled, and China " highway asphalt road
Surface construction technical specification " dense-graded asphalt concrete mixture gap rate is generally required in 3%-6% in (JTGF40-2004)
Between.And the usual very little of ratio shared by optimum asphalt content, generally 5%.Aggregate quality accounts for mixture overall quality
90% or more, volume accounts for 70% or more.Therefore, asphalt uniformity coefficient is improved, and controls its voidage with important
Theory significance and engineering application value.
In bituminous coat project work progress, asphalt mixes and stirs quality, transports, paves, rolled relative to it
Journey is even more important, mixes and stirs the validity that quality directly determines subsequent construction process.According to " asphalt highway construction technology rule
Model " (JTGF40-2004) requirement, batch mixer or continuous mixer mixing, highway can be used in asphalt
It is preferably mixed and stirred using batch mixer with Class I highway.
Currently, asphalt, which mixes and stirs, to be divided by four production technology, construction temperature, productivity and mobility aspects
Class.According to the difference of production technology, intermittent mix and stir can be divided into and mix and stir two kinds with continous way.It is intermittent mix and stir be heat is gathered materials,
Investment is mixed and stirred pot and is mixed and stirred miberal powder and pitch measure in batches after, draws off after mixing and stirring, forms operation in cycles.Continous way
It mixes and stirs, is continuously to transport a variety of materials to pot is mixed and stirred, the material mixed and stirred is continually continuous from mixing and stirring in pot
It draws off；In structure, drying that continous way was mixed and stirred gather materials is carried out in the same roller with mixing and stirring, so also referred to as drum-type is mixed
With.According to construction temperature difference, traditional heat can be divided into and mix (150-180 DEG C), warm mix (110-130 DEG C), cold mixing (5-30 DEG C) three
Kind.According to production capacity, it can be divided into that small-sized (productivity is in 40t/h or less), medium-sized (productivity is in 40~400t/h), large-scale
(productivity is in 400t/h or more) three classes.By mobility, being divided into movable type, (feed bin carries tire with pot is mixed and stirred, can be with construction
The transfer of ground place), semi-fixed type (apparatus on several trailers, in job location assembly) and fixed (equipment operation
Point is fixed) three kinds.
Regardless of carrying out mixing and stirring sort research to asphalt with which kind of standard, all do not consider that vibration mixes and stirs it is related because
Element.It is more to consider to increase the function such as vibrosieve and secondary measurement even currently as the Double-horizontal-shaft stirring technique of mainstream
Can, it forces to gather materials etc. when mixing and stirring to move to horizontal and vertical directions.Moreover, the uniform mixing of mixture is more at present
It is that the degree for wrapping up coarse aggregate by pitch is evaluated.For example, differentiating in Unite States Standard AASHTO T195 or ASTM D2489
Asphalt whether uniform mixing definition and index request are as follows: uniform mixing refer in mixture be greater than 9.5mm sieve pore
The particle of size at least 95% is wrapped completely by full pitch.
But coarse aggregate degree only is wrapped with asphalt membrane and judges that the uniformity of mixture is less perfect.Asphalt is mixed
In the process, it although coarse aggregate is not to be wrapped at first by asphalt membrane, is relatively easily wrapped one by one, " conglomeration " feelings should not occur
Condition.And fine aggregate and filler (miberal powder or nanoscale/Subnano-class material) are easier " group occur in by asphalt membrane coating process
Grain " phenomenon.The larger easy adsorptive pitch of the specific surface area of the especially fillers such as miberal powder and bond agglomerating, the presence meeting of this adhesive aggregation group
The uniformity of mixture is seriously affected, can also to mix and stir difficulty.It is serious to reduce Homogeneity of Asphalt Mixture and voidage, in turn
Related mechanics and pavement performance are influenced, bituminous pavement service life is reduced.
Summary of the invention
The purpose of the present invention is to provide a kind of vibrations of asphalt mixing plant to mix and stir operating method, solves in asphalt
Fine aggregate and filler " granule " problem, overcome the frictional force and viscous force between agglomerate material particles.
Another object of the present invention, which also resides in, provides a kind of asphalt mixing plant vibrating mixing device.
The technical scheme adopted by the invention is that asphalt mixing plant vibrating mixing device, including rack, rack are equipped with and mix
Cylinder, vibrator are set at the center for mixing one side tube-wall of cylinder, and rack is by mixing cylinder interior and setting on damping device floating connection to chassis
There are the first agitating shaft and the second agitating shaft, vibrating motor is set on rack side, and vibrating motor is connected with vibrating motor belt wheel,
Vibrating motor belt wheel is connected by vibrating V band with vibration excitor belt wheel, and one end of two transmission shafts is connect with two vibration excitor belt wheels,
The other end is fixedly connected with vibrating body, and transmission shaft is arranged in the inside of vibration excitor, one end of the first agitating shaft and the second agitating shaft
With vibrating body floating connection, the other end passes through the output axis connection of bearing block I and two planetary reducer, and planetary reducer passes through
Stirring V band is connected with stirring motor, and stirring motor is set in rack, and two planetary reducers are connected by speed reducer synchronizing shaft
It connects, agitating shaft heating device, which is set to, to be mixed on the outside of cylinder and contact with the first agitating shaft and the second agitating shaft, the first agitating shaft and second
Stir it is shaft staggered be uniformly distributed equipped with the first mixing arm and the second mixing arm, the first mixing arm and the second mixing arm end are equipped with and stir
Mix blade.
Further, described mix is provided with upper cover at the top of cylinder, mixes and is set on the inside of cylinder barrel there are two axle end sealing device, and first
Agitating shaft and the second agitating shaft are set in rack and connect with heat-transfer pipe through cylinder, axle end sealing device, hot oil heater is mixed
It connects, heat-transfer pipe, which is fixed at, mixes two side tube-wall of cylinder, and Dump gate is set to and mixes cylinder bottom portion, and Dump gate end and discharging door sensor unload
The connection of bin gate driving mechanism, discharging door sensor, discharging door drive mechanism are set in rack, and discharging door sensor, Dump gate are driven
Motivation structure is set to and mixes on cylinder, and discharging door sensor is made of sensor I, sensor II, sensor III, sensor I, sensor
II, the installation site of sensor III respectively corresponds Dump gate closing, half-open, standard-sized sheet position, and wear-resistant liner, which is set to, to be mixed on the inside of cylinder,
Electric-control system is set to and mixes cylinder side wall.
Further, the electric-control system is stopped by complete machine electric lock button, stirring start button, mixing control system, stirring
Only button, heating starting button, heating control system, heating stop button, thermoregulator, oil temperature indicator, emergency stop switch
Composition, power supply are electrically connected with the electric-control system.
Further, the emergency stop switch is connected with the other component in addition to emergency stop switch in electric-control system, stirring
Start button, mixing control system, stirring stop button by frequency converter distinguish with stirring motor, vibrating motor, vibrator
Electrical connection, stirring stop button are electrically connected with discharging door sensor and discharging door drive mechanism respectively by frequency converter, and heating is opened
Dynamic button, heating control system, heating stop button, thermoregulator, oil temperature indicator are electrically connected with hot oil heater
It connects.
Further, the stirring blade and the first agitating shaft and the second agitating shaft are in 35 °~55 ° angles.
Further, the vibrating body eccentricity is 0.5mm~3mm.
Further, the stirring blade is made of end blade, paddle and return leaf, returns to installation direction and the end of leaf
Blade, stirring blade are contrary, and end blade is close to mix the inner wall of cylinder.
Another technical solution adopted in the present invention is that the operating method of asphalt mixing plant vibrating mixing device, specifically
It follows the steps below:
Step 1: opening agitating shaft heating device, hot oil heater, stirred to cylinder and the first agitating shaft and second is mixed
Axis is heated；
Step 2: open stirring motor, vibrating motor and vibrator when the temperature for mixing in cylinder reaches setting value, according to matching
Than successively feeding intake；While first agitating shaft and the second agitating shaft continuously stir, vibrating motor drives vibration excitor work, vibrator
Cylinder vibration is mixed in drive, sufficiently mixes material；
Step 3: electric control system controls discharging door drive mechanism pushes Dump gate to carry out discharging when discharging, passed in Dump gate
Under the information feedback of sensor, control Dump gate completes the movement of half-open, standard-sized sheet, closing.
The invention has the advantages that solving the fine aggregate and filler " granule " phenomenon in asphalt, make it abundant
Disperse.Overcoming the frictional force and viscous force between agglomerate material particles, keeps adhesive aggregation group broken, each material component is uniformly dispersed again,
Voidage is reduced, that improves mixture mixes and stirs quality；Excitation material potential, and then Pavement of Asphalt Road Performance is improved, extend drip
Green road surface Years Of Service realizes durable asphalt pavement developing goal, improves Homogeneity of Asphalt Mixture, control voidage, just
In popularization, suitable for a variety of Load materials, technique is mixed and stirred.Vibration of the invention is secondary to mix and stir, and mixes and stirs effect, pitch is to aggregate
Package degree, have and significantly promoted, be obviously crushed, impact, wrap up in slurry effect for uniting, mixing unevenly to have.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the front view of asphalt mixing plant vibrating mixing device；
Fig. 2 is the top view of asphalt mixing plant vibrating mixing device；
Fig. 3 is the vibration end-view of asphalt mixing plant vibrating mixing device；
Fig. 4 is the stirring end-view of asphalt mixing plant vibrating mixing device；
Fig. 5 is the schematic diagram of discharging door drive mechanism；
Fig. 6 is the schematic diagram of electric-control system；
Fig. 7 is the electrical module schematic diagram of asphalt mixing plant vibrating mixing device；
Fig. 8 a is that embodiment 2 uses the conventional AC-20C asphalt typical section CT surface sweeping figure mixed and stirred；
Fig. 8 b is the AC-20C asphalt typical section that embodiment 2 is obtained using asphalt mixing plant vibrating mixing device
CT surface sweeping figure.
In figure, 1. mix cylinder, 2. heat-transfer pipes, 3. vibrators, 4. upper covers, 5. racks, 6. damping devices, 7. stirring motors, and 8.
Stir V band, 9. planetary reducers, 10. vibrating motors, 11. transmission shafts, 12. vibration excitors, 13. vibrating bodies, 14. shaft end seals dress
It sets, the first agitating shaft of 15-1., the second agitating shaft of 15-2., the first mixing arm of 16-1., the second mixing arm of 16-2., 17. paddles
Piece, 18. wear-resistant liners, 19. agitating shaft heating devices, 20. bearing blocks I, 21. vibrating motor belt wheels, 22. vibration V bands, 23. swash
Shake device belt wheel, 24. electric-control systems, 24-1. complete machine electric lock button, 24-2. stirring start button, 24-3. mixing control button,
24-4. stirs stop button, 24-5. heating starting button, 24-6. heating control system, 24-7. heating stop button, 24-8.
Thermoregulator, 24-9. oil temperature indicator, 24-10. emergency stop switch, 25. hot oil heaters, 26. discharging door sensors,
26-1. sensor I, 26-2. sensor II, 26-3. sensor III, 27. Dump gates, 28. discharging door drive mechanisms, 29. chassis,
30. speed reducer synchronizing shaft.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Asphalt mixing plant vibrating mixing device, as shown in figures 1 to 6, including rack 5, rack 5 are equipped with and mix cylinder 1, mix the top of cylinder 1
Portion is provided with upper cover 4, and vibrator 3 is fixedly mounted at the center for mixing 1 one side tube-wall of cylinder, and rack 5 is floated by damping device 6 to be connected
It is connected on chassis 29, mixes and be fixedly connected on inside cylinder 1 equipped with the first agitating shaft 15-1 and the second agitating shaft 15-2, vibrating motor 10
On 5 side of rack, vibrating motor 10 is connected with vibrating motor belt wheel 21, and vibrating motor belt wheel 21 is by vibration V band 22 and swashs
The device belt wheel 23 that shakes is connected, and one end of two transmission shafts 11 is connect with two vibration excitor belt wheels 23, and the other end and vibrating body 13 are fixed
Connection, transmission shaft 11 are arranged in the inside of vibration excitor 12 by bearing, and the one of the first agitating shaft 15-1 and the second agitating shaft 15-2
End is connected by bearing and 13 floating connection of vibrating body, the other end by the output shaft of bearing block I 20 and two planetary reducers 9
It connects, planetary reducer 9 is connected by stirring V band 8 with stirring motor 7, and stirring motor 7 is set in rack 5, two planetary reducers
9 are connected by speed reducer synchronizing shaft 30, stir agitating shaft heating device 19 be set to mix 1 outside of cylinder and with the first agitating shaft 15-1 and
Second agitating shaft 15-2 contact, two axle end sealing devices 14, which are fixed on, to be mixed on the inside of 1 cylinder of cylinder, the first agitating shaft 15-1 and second
Agitating shaft 15-2 is staggeredly uniformly distributed through cylinder 1, axle end sealing device 14, the first agitating shaft 15-1 and the second agitating shaft 15-2 is mixed
Stirring is equipped with equipped with the first mixing arm 16-1 and the second mixing arm 16-2, the first mixing arm 16-1 and the second end mixing arm 16-2
Blade 17；Hot oil heater 25 is fixed in rack 5 and connect with heat-transfer pipe 2, and heat-transfer pipe 2, which is fixed at, mixes 1 two sides of cylinder
Barrel, Dump gate 27 are set to and mix 1 bottom of cylinder, and 27 end of Dump gate is connect with discharging door sensor 26, discharging door drive mechanism 28,
Discharging door sensor 26, discharging door drive mechanism 28 are bolted in rack 5, and discharging door sensor 26, Dump gate are driven
Motivation structure 28, which is fixed on, to be mixed on cylinder 1, and discharging door sensor 26 is by I 26-1 of sensor, II 26-2 of sensor, III 26-3 group of sensor
At wear-resistant liner 18 is uniformly fixed on by bolt mixes 1 inside of cylinder, and electric-control system 24 is set to and mixes 1 side wall of cylinder, as shown in fig. 7, electric
Control system 24 is by complete machine electric lock button 24-1, stirring start button 24-2, mixing control system 24-3, stirring stop button 24-
4, heating starting button 24-5, heating control system 24-6, heating stop button 24-7, thermoregulator 24-8, oil temperature instruction
Device 24-9, emergency stop switch 24-10 composition, power supply are electrically connected with electric-control system 24, in emergency stop switch 24-10 and electric-control system 24
Other component in addition to emergency stop switch 24-10 is connected, and stirring start button 24-2, mixing control button 24-3, stirring stop
Button 24-4 is electrically connected with stirring motor 7, vibrating motor 10, vibrator 3 and discharging door sensor 26 respectively by frequency converter,
Discharging door sensor 26 is electrically connected with discharging door drive mechanism 28, heating starting button 24-5, heating control system 24-6, heating
Stop button 24-7, thermoregulator 24-8, oil temperature indicator 24-9 are electrically connected with hot oil heater 25.
13 eccentricity of vibrating body is 0.5mm~3mm.
When vibrating motor 10 works, vibration V band 22 and vibration excitor belt wheel 23 are driven by vibrating motor belt wheel 21, drives and passes
Moving axis 11 drives vibrating body 13 to be eccentrically rotated, and the exciting force for being eccentrically rotated generation is transferred to and its company of floating by vibrating body 13
On the first agitating shaft 15-1 and the second agitating shaft 15-2 connect, driving mixing arm 16 and stirring blade 17 conduct exciting force to mixing and stirring
In material, realize that vibration is mixed and stirred.
I 26-1 of sensor, II 26-2 of sensor, III 26-3 of sensor installation site correspond to three kinds of shapes of Dump gate 27
State: it closes, half-open, standard-sized sheet.
When mixing and stirring, two planetary reducers 9 realize synchronous return motion, the first agitating shaft by speed reducer synchronizing shaft 30
15-1 and the rotation of the second agitating shaft 15-2 synchronous backward, stirring blade 17 and the first agitating shaft 15-1 and the second agitating shaft 15-2 at
35 °~55 ° angles, variable angle will affect the linear velocity of spice, and angle is bigger, participate in the spice mixed and stirred and mix more fierce, appearance
It is also easy to produce isolation, has a detrimental effect to mixing quality, 45 ° of whens are axial the most uniform with radial forces distribution diffusion, stir
When blade 17 rotates, radial thrust is generated, mixture is made to spin stirring movement along axial direction, when work makes to mix the object in cylinder 1
Material, which is generated, pushes the other side to by the side of an agitating shaft, and by another circulation action with the reversed forced back of agitating shaft, with
This simultaneously, mixture, there are mutual shearing motion, obtains material between the first agitating shaft 15-1 and the second agitating shaft 15-2
It sufficiently mixes.Stirring blade 17 is made of end blade, paddle and return leaf, returns to the installation direction and end blade, stirring of leaf
Direction blade is on the contrary, end blade is close to mix the inner wall of cylinder 1, and the return leaf of stirring blade 17 is by mixture on the first agitating shaft 15-1
It elapses along the first agitating shaft 15-1 to the other end, and pushes second one end agitating shaft 15-2 to by returning to blade at the other end,
And push second one end agitating shaft 15-2 to by returning to blade at the other end, then axially elapse along second end agitating shaft 15-2
To the other end of the second agitating shaft 15-2, " mouth " type circulation is formed in cylinder 1 mixing, i.e. axial reciprocating recycles.Stirring blade 17 has
There is established angle, while axially passage is to the other end along first one end agitating shaft 15-1, partial blend is also radially pushed into the
Two agitating shaft 15-2, similarly, while the second agitating shaft 15-2 is along one end axial direction passage to the other end, also by partial blend diameter
To the first agitating shaft 15-1 is pushed into, radial reciprocation cycle is formed in cylinder 1 mixing.
While continuously mixing and stirring, vibration excitor 12 transfers energy to the by 10 inputted vibration energy of vibrating motor
One agitating shaft 15-1 and the second agitating shaft 15-2, mixing arm 16, on stirring blade 17, vibration is directly delivered to by vibrator 3 mixes
On cylinder 1, in the case where vibrational energy of the vibrating body 13 to the first agitating shaft 15-1 and the second agitating shaft 15-2 conducts, so that the first stirring
Axis 15-1 and the second agitating shaft 15-2, mixing arm 16, stirring blade 17 vibrate while stirring, while mixing cylinder 1 also in vibrator 3
The lower vibration of effect, enhances mixing effect, improves the microcosmic homogeneity of asphalt and stirring efficiency.
Electromagnetic induction heating coil is set in agitating shaft heating device 19, and after energization, the first agitating shaft 15-1 and second is stirred
It mixes the surface axis 15-2 and generates cutting alternate magnetic force line, alternation vortex effect occurs for the first agitating shaft 15-1 and the second agitating shaft 15-2
It answers, vortex makes the carrier high speed random motion of the first agitating shaft 15-1 and the second agitating shaft 15-2, and carrier is mutual with atom
It collides, rub and generate a large amount of thermal energy, complete the quick heating to the first agitating shaft 15-1 and the second agitating shaft 15-2, work
When electric-control system 24 control hot oil heater 25 begin to warm up heat-transfer pipe 2, to heat to cylinder 1 is mixed, work as mixture
It is mixing in cylinder 1 after completion stirring, electric-control system 24 controls discharging door drive mechanism 28 and Dump gate 27 is pushed to carry out discharging, in discharging
Under the information feedback of door sensor 26, control Dump gate 27 completes the movement of half-open, standard-sized sheet, closing.
In view of the actual conditions of asphalt mixing plant, asphalt mixing plant vibrating mixing device needs to be mounted on whole pitch and mixes
Closing could run well in station, therefore the control system of asphalt mixing plant vibrating mixing device is no longer individually set up, but collects and install additional
Into the existing system of asphalt mixing plant.For heating temperature in the range of 0 DEG C~250 DEG C, precision is 1 DEG C；Mould is mixed and stirred in vibration
Formula selection in " stirring ", " vibration ", " stirring+vibration " Three models；When being related to " vibrating " in elected modulus formula, in " axis
Selection in vibration ", " mixing cylinder vibration " " shaft vibration+mix cylinder vibration " Three models." shaft vibration " or the vibration of " mixing cylinder vibration " are strong
Spend adjustable in the range of 2g~15g, precision 0.1g；It is adjustable in the range of 20HZ~50HZ to vibrate the frequency, essence
Degree is 0.1HZ.
Since torque needed for stirring is larger, when arranging single stirring motor, motor and transmission system volume are excessive, are unfavorable for reality
Border application, when double stirring motors, can reduce equipment volume, share stirring torque, improve application factor, extend equipment and use week
Phase when using double vibration motor, since the two vibration frequency is different, is staggered after frequency, improves vibration and mix and stir effect, avoid simultaneously
Harmful resonance occurs.
Vibration of the invention is secondary to mix and stir, mixing effect, and pitch has and significantly promoted to the package degree of aggregate, right
In unite, mix it is uneven etc. have obvious broken, slurry effect is wrapped up in impact.Common heating is secondary to mix and stir, then without this function.
Asphalt mixing plant vibrating mixing device uses action of forced stirring with the vibrating enhanced embodiment combined, due to aggregate
Interface is link the weakest in asphalt mixture, and the effect of vibration of Vibratory Mixing increases the movement velocity of mixture particle
Greatly, effective collision number is increased, in collision process, the fine aggregate and filler in asphalt are under impact, " group
Grain " is constantly crashed, and " agglomerate " phenomenon significantly reduces, and significantly enhances the interface binding intensity between aggregate and pitch, is improved
Link the weakest, improves asphalt mixture intensity in asphalt mixture.
The operating method of asphalt mixing plant vibrating mixing device, specifically follows the steps below:
Step 1: agitating shaft heating device 19, hot oil heater 25 are opened, to mixing cylinder 1 and the first agitating shaft 15-1
It is heated with the second agitating shaft 15-2, it is ensured that mix the temperature in cylinder 1 and mix and stir temperature close, reduce hot material and heated bitumen enters
Mix influence of the temperature difference to mixture performance after cylinder 1；
Step 2: opening stirring motor 7, vibrating motor 10 and vibrator 3 when the temperature for mixing in cylinder 1 reaches setting value, pressing
It successively feeds intake according to proportion；While first agitating shaft 15-1 and the second agitating shaft 15-2 are continuously stirred, vibrating motor 10, which drives, to swash
The device 12 that shakes works, and the vibration of cylinder 1 is mixed in the drive of vibrator 3, sufficiently mixes material；
Step 3: electric-control system 24 controls discharging door drive mechanism 28 and Dump gate 27 is pushed to carry out discharging when discharging, unloading
Under the information feedback of bin gate sensor 26, control Dump gate 27 completes the movement of half-open, standard-sized sheet, closing；And then discharging quantity is controlled,
Achieve the purpose that need how much to unload how many, extra mixtures and be temporarily stored in mix to enter keeping warm mode in cylinder 1, be unloaded to next batch
Material.
Wherein, the heating temperature of asphalt vibrating mixing device adjustable, precision in the range of 0 DEG C~250 DEG C
It is 1 DEG C.
Feed intake control setting in each component feeding sequence and the mixing time it is adjustable；Every pot of time mixing time can 0s~
It is adjustable in the range of 1000s, precision 1s.
Every pot of discharging batch of discharging control setting can be optional in 0 time~20 times ranges, and precision is 1 time, and every
Secondary discharging quantity can be in 0m3~10m3In the range of adjustable, precision 0.01m3。
Embodiment 1
Use hot in-plant reclaimed asphalt used in asphalt mixing plant vibrating mixing device mixing national highway overhaul maintenance engineering
Mixture, asphalt mixing plant vibrating mixing device carries out asphalt and vibrates the mixing situation mixed and stirred, and mixes and stirs with non-vibration
(i.e. conventional to mix and stir) test section compares:
The preparation of raw material: the raw material such as pitch used in pavement construction, rubble, aggregate chips first carry out various examinations before marching into the arena
It tests, the selection of a variety of materials has to comply with " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) skill related with design
Art index request, underproof material do not have to firmly:
1) RAP material: selecting the overhaul national highway milling reclaimed asphalt pavement, is divided into 16mm or more after broken and screening
Two grades of old material and 16mm or less old material thickness, aggregate feature experimental result, RAP mineral aggregate gradation are all satisfied specification and engineering construction is wanted
It asks；
2) pitch uses Dongming 70#SBS modified pitch, and through detecting, the SBS modified pitch indices of selection are all satisfied rule
Model and design requirement, after being reconciled according to new pitch and Bituminous concrete surface from the point of view of testing result, Bituminous concrete surface: the mass ratio of new pitch is
Pitch three norms when 21.0:79.0 or 25.0:75.0 are all satisfied requirement, comprehensively consider bituminous cements test result and warp
Ji property determines and selects Bituminous concrete surface: the mass ratio of new pitch is that 25:75 carries out mix proportion design；
3) thick, fine aggregate uses the limestone in local stone pit nearby for coarse aggregate, is 1#13.2~19mm, 2# respectively
4.75~13.2mm, 3#2.36~4.75mm；The mountain flour for 4#0~2.36mm that fine aggregate still uses the stone pit to produce, it is various
The screening result for material heap of gathering materials, coarse aggregate quality index testing result, fine aggregate quality index testing result meet the requirements；
4) miberal powder is selected nearby local, which uses the levigate gained of limestone alkalinity building stones, through detecting indices
It is all satisfied specification and design requirement；
Mix component design: by hot in-plant reclaimed asphalt mixture Target Mixture Ratio and refinery operation scheduling and
Mixture gradation debugging and associated verification test, final determining 16mm or more milling material, 16mm or less milling material, the storehouse 1#: the storehouse 2#:
The storehouse 3#: the storehouse 4#: the storehouse 5#: the mass ratio of miberal powder is 9.0:16.0:21.0:17.0:13.0:9.0:12.0:3.0, and asphalt content is
Quality of asphalt mixtures score 4.3%, bulk specific gravity 2.472, voidage 4.8% survey theoretical relative density
It is 2.625；
Whole mechanical equipments have moved into construction site, and are all overhauled, and various equipment run well, energy
Meet the requirement of construction, each construction personnel moves into construction site in place, and project management department has also held mobilization to various skilled workers
Meeting and reinforcing construction quality consciousness, and the related technical indicator of the related requirement and test section to design specification is told somebody what one's real intentions are；
Comparative test section, which is mixed and stirred, selects same intermittent asphalt mixture mixer, to guarantee comparative test validity,
It installs asphalt mixing plant vibrating mixing device additional on original equipment, has carried out vibration and mixed and stirred transformation, freely control whether to open vibration
It mixes and stirs, as initial routine is mixed and stirred when not opening, is transported to construction site using bulk transport vehicle, is spread out with 1 paver
Paving, hot seam are once completed, hot in-plant reclaimed asphalt concrete cutting optimal working procedure are as follows: road surface --- Sub-sealing Course is applied for cleaning
Work --- surveying and locating --- asphalt mixes and stirs --- asphalt transport and --- roller-compaction --- inspection that paves
Survey --- open to traffic；
The production mix proportion that asphalt answers comparative test road to determine is mixed and stirred, after being reequiped using apparatus of the present invention
Intermittent large-scale asphalt mixing plant is forced to mix and stir, which has full-automatic function control system, and entire control process is whole
It completes on computers, can modify and be controlled with when global function on the screen, have automatic secondary screening function, grade to asphalt
Match, weigh accurate, stable and reliable for performance, can guarantee the quality of mixing and stirring of asphalt, mixer strict control mixture is mixed
And the time, it is ensured that mixture mixes uniform, and guarantees that vibration is mixed and stirred and mixes and stirs with non-vibration without the appearance of grey material.
Two kinds are mixed and stirred it is important to note that the following:
1) thick, fine aggregate should classify stacking and feed, be sampled test to the specification of each material, and through Supervision engineering
Teacher's approval, mixes and stirs to gather materials and fully dry, every kind of specification gather materials and pitch all must match ratio respectively as required into
Row ingredient.
2) heating temperature must be accurately grasped when mixing and stirring, is mixed with technique and dosage, and temperature is mixed and stirred in control conscientiously.Newly gather materials with
Plain asphalt mixture mixes and stirs situation and compares, and should improve 10 DEG C, heating temperature range is 180 DEG C~190 DEG C；And old material enters in advance
Hot-zone is melted by heat exchange and pre-heating temperature elevation, is added new pitch after new and old gather materials mixing and heat transmitting balance and is mixed and stirred to face
It discharges after color uniformity, drop temperature requires consistent with common hot-mix asphalt mixture in principle.
3) different mixture proportion, the different water content of waste material, the heat of the heating temperature of virgin material, new old material in a mixing bowl
The transmitting mixing time is different from, and mixes the control of cylinder temperature at 170 DEG C.
4) hot recycling mixing apparatus should have reliable heating device and temperature-detecting device.Newly adding mineral aggregate, Bituminous concrete surface dry
Gather materials exit, hot collecting bin and mixer mixture exit of dry cylinder should set temperature measuring equipment.Temperature measuring equipment precision should be higher than that ± 5
DEG C, the precision of weighing equipment should be higher than that ± 1%.
5) intermittent asphalt mixture batching plant is used for mixing reclaimed asphalt mixture after repacking.Batching plant control room is wanted
The dosage of pitch and various mineral aggregates is printed by disk and mixes and stirs temperature, and periodically the metering of batching plant and thermometric are checked；Not yet
There is the mixer of material utilization amount and temperature self-recording unit that must not use.
6) mixing time of asphalt determines through trial mix, and old asphalt mixture is into after mixing cylinder, first and heat new collection
Material mixes and stirs 5-10s, and new pitch is then added, mixes and stirs 30-45s, asphalt uniform mixing of the mixing time to produce, no flower
Subject to white material, according to trial mix, total mixing time is controlled in 55s.
7) all mixtures excessively heated, or carbonized, blistered and aqueous mixture is all abandoned.Two kinds are mixed
Be on later mixture sense organ it is uniform, without having grey spot phenomenon.Asphalt should be surveyed when dispatching from the factory by car test
The weight and temperature of asphalt record the time of making the product, sign and issue haul list.
Each live 500 meters of making of this comparative test, material therefor, it is used mix and stir, pave, rolling apparatus, mixer behaviour
It is all the same to make personnel, site operation personnel.Progress on-site test after the completion of paving, data measured, as shown in Table 1 and Table 2.
Table 1 vibrates to mix and stir to be compared with the pavement structure performance indicator routinely mixed and stirred
Table 2 vibrates to mix and stir to be compared with the mixture performance index routinely mixed and stirred
| Test item | Vibration is mixed and stirred | Routine is mixed and stirred and (is not vibrated) |
| Fatigue life/time | 43085 | 29741 |
| Compression rebound modulu/MPa | 1862 | 1597 |
| Uniaxial direct tensile intensity/MPa | 1.07 | 0.85 |
| Uniaxial compressive strength/MPa | 7.29 | 5.47 |
Embodiment 2
Step 1: choosing SK-70# heavy traffic flow pitch, while 5%SBS is added, pitch is modified；Coarse aggregate uses
Building stones partial size be 13.2mm~19mm, 5mm~13.2mm, fine aggregate using basalt it is broken made of Machine-made Sand, filler is
The miberal powder and 325# cement that dolomite is ground, fiber stabilizer use graininess wood fibre additive；
Step 2: gather materials, filler, fiber stabilizer and asphalt material are strictly measured by production mix proportion specified volume, and
It being sent into mixer and is mixed and stirred, for drop temperature at 175 DEG C~185 DEG C, mixture, which mixes and stirs maximum temperature, must not be higher than 195 DEG C,
It is discarded when more than 195 DEG C, aggregate heating temperature is controlled at 190 DEG C~200 DEG C；Filler and fiber stabilizer do not heat；
Step 3: graininess wood fibre additive is directly added into and mixes cylinder 1, using the existing special container of asphalt mixing plant
Fabric thrashing is increased dry mixing when graininess wood fibre additive is added by quantitative investment, the impact force mixed and stirred using coarse aggregate
Time 5s~10s；
Step 4: SMA asphalt is according to " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) requirement
After mixing and stirring, mixing finished product is paved in 12 hours and is finished.
Mixing and stirring for this SMA mixture comparative test carries out preparation production using same intermittent asphalt mixture mixer
Product, and pave and finish in 12 hours to obtained mixing finished product, each live 500 meters of making of comparative test, material therefor, institute
With mixing and stirring, paving, rolling apparatus, mixer operator, site operation personnel are all the same.Live inspection is carried out after the completion of paving
It surveys, following data is measured, as shown in table 3- table 5.
Table 3 vibrates to mix and stir to be compared with the pavement structure performance indicator routinely mixed and stirred
Table 4 vibrates to mix and stir to be compared with the mixture performance index routinely mixed and stirred
| Test item | Vibration is mixed and stirred | Routine is mixed and stirred and (is not vibrated) |
| Fatigue life/time | 52079 | 31263 |
| Compression rebound modulu/MPa | 2362 | 2085 |
| Uniaxial direct tensile intensity/MPa | 1.21 | 0.95 |
| Uniaxial compressive strength/MPa | 8.35 | 6.29 |
The vibration of 5 SMA-13 bitumen mixture specimen of table, which is mixed and stirred, mixes and stirs comparative analysis with conventional
Respectively to SMA-13 asphalt routinely mix and stir with vibration mix and stir two ways shaping test piece carry out CT tomography sweep
It retouches, is spaced 5mm, obtains each 10 tensile fracture scan slice of test specimen, carry out characteristics of objects, that is, gap with Image proplus software
Rate is counted, and the voidage that 10 tensile fractures are sliced is taken mean value, obtains the thin sight voidage of test specimen.
By table 5 and Fig. 8 a and Fig. 8 b it is found that the voidage routinely mixed and stirred is 8.8%, vibrating the voidage mixed and stirred is
4.42%, it is possible thereby to illustrate, the present invention can effectively reduce the voidage of SMA-13 asphalt.
Claims (8)
1. asphalt mixing plant vibrating mixing device, which is characterized in that including rack (5), rack (5) is equipped with and mixes cylinder (1), vibrates
Device (3) is set at the center for mixing (1) one side tube-wall of cylinder, and rack (5) passes through on damping device (6) floating connection to chassis (29),
It mixes and is equipped with the first agitating shaft (15-1) and the second agitating shaft (15-2) inside cylinder (1), vibrating motor (10) is set to rack (5) side
On, vibrating motor (10) is connected with vibrating motor belt wheel (21), and vibrating motor belt wheel (21) passes through vibration V band (22) and exciting
Device belt wheel (23) is connected, and one end of two transmission shafts (11) is connect with two vibration excitor belt wheels (23), the other end and vibrating body
(13) it is fixedly connected, transmission shaft (11) is arranged in the inside of vibration excitor (12), the first agitating shaft (15-1) and the second agitating shaft
The one end of (15-2) and vibrating body (13) floating connection, the other end are defeated by bearing block I (20) and two planetary reducers (9)
Axis connection out, planetary reducer (9) are connected by stirring V band (8) with stirring motor (7), and stirring motor (7) is set to rack (5)
On, two planetary reducers (9) are connected by speed reducer synchronizing shaft (30), and agitating shaft heating device (19) is set to and mixes cylinder (1)
Outside simultaneously contacts, the first agitating shaft (15-1) and the second agitating shaft with the first agitating shaft (15-1) and the second agitating shaft (15-2)
(15-2) is staggeredly uniformly distributed equipped with the first mixing arm (16-1) and the second mixing arm (16-2), the first mixing arm (16-1) and the
The two mixing arms end (16-2) is equipped with stirring blade (17).
2. asphalt mixing plant vibrating mixing device according to claim 1, which is characterized in that described mix sets at the top of cylinder (1)
Upper cover (4) are equipped with, mixes and is set on the inside of cylinder (1) cylinder there are two axle end sealing device (14), the first agitating shaft (15-1) and second stirs
Axis (15-2) is mixed through mixing cylinder (1), axle end sealing device (14), hot oil heater (25) be set on rack (5) and with biography
Heat pipe (2) connection, heat-transfer pipe (2), which is fixed at, mixes (1) two side tube-wall of cylinder, and Dump gate (27) is set to and mixes cylinder (1) bottom, Dump gate
(27) end is connect with discharging door sensor (26), discharging door drive mechanism (28), discharging door sensor (26), Dump gate driving
Mechanism (28) is set on rack (5), and discharging door sensor (26), discharging door drive mechanism (28) are set to and mix on cylinder (1), Dump gate
Sensor (26) is made of sensor I (26-1), sensor II (26-2), sensor III (26-3), and sensor I (26-1) passes
Sensor II (26-2), sensor III (26-3) installation site respectively correspond Dump gate (27) close, half-open, standard-sized sheet position,
Wear-resistant liner (18), which is set to, to be mixed on the inside of cylinder (1), and electric-control system (24) is set to and mixes cylinder (1) side wall.
3. asphalt mixing plant vibrating mixing device according to claim 2, which is characterized in that the electric-control system (24) by
Complete machine electric lock button (24-1), stirring start button (24-2), mixing control system (24-3), stirring stop button (24-4),
Heating starting button (24-5), heating control system (24-6), heating stop button (24-7), thermoregulator (24-8), oil
Warm indicator (24-9), emergency stop switch (24-10) composition, power supply are electrically connected with the electric-control system (24).
4. asphalt mixing plant vibrating mixing device according to claim 3, which is characterized in that the emergency stop switch (24-
10) it is connected with the other component in addition to emergency stop switch (24-10) in electric-control system (24), stirring start button (24-2),
Mixing control system (24-3), stirring stop button (24-4) by frequency converter distinguish with stirring motor (7), vibrating motor
(10), vibrator (3) be electrically connected, stirring stop button (24-4) by frequency converter respectively with discharging door sensor (26) and discharging
Door drive mechanism (28) electrical connection, heating starting button (24-5), heating control system (24-6), heating stop button (24-
7), thermoregulator (24-8), oil temperature indicator (24-9) are electrically connected with hot oil heater (25).
5. asphalt mixing plant vibrating mixing device according to any one of claims 1-4, which is characterized in that the stirring
Blade (17) and the first agitating shaft (15-1) and the second agitating shaft (15-2) are in 35 °~55 ° angles.
6. asphalt mixing plant vibrating mixing device according to claim 1, which is characterized in that the vibrating body (13) is eccentric
Amount is 0.5mm~3mm.
7. asphalt mixing plant vibrating mixing device according to claim 1, which is characterized in that the stirring blade (17) by
It holds blade, paddle and returns to leaf composition, the installation direction for returning to leaf is contrary with end blade, stirring blade, and end blade is tight
Patch mixes the inner wall of cylinder (1).
8. the operating method of the asphalt mixing plant vibrating mixing device as described in claim 1-4,6-7 any one, feature
It is, specifically follows the steps below:
Step 1: agitating shaft heating device (19), hot oil heater (25) are opened, to mixing cylinder (1) and the first agitating shaft
(15-1) and the second agitating shaft (15-2) are heated；
Step 2: opening stirring motor (7), vibrating motor (10) and vibrator when the temperature for mixing in cylinder (1) reaches setting value
(3), it successively feeds intake according to the proportion；While first agitating shaft (15-1) and the second agitating shaft (15-2) continuously stir, vibration electricity
Machine (10) drives vibration excitor (12) work, and vibrator (3) drive mixes cylinder (1) vibration, sufficiently mixes material；
Step 3: electric-control system (24) controls discharging door drive mechanism (28) and Dump gate (27) is pushed to carry out discharging when discharging,
Under the information feedback of discharging door sensor (26), the movement of half-open, standard-sized sheet, closing is completed in control Dump gate (27).
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| CN111553585A (en) * | 2020-04-24 | 2020-08-18 | 天津大学 | System and method for monitoring mixing quality of core wall asphalt mixture in real time |
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