SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a bituminous paving heats blender, it can evenly heat old bituminous mixture after the harrow pine to 140 ℃ -150 ℃, and the bituminous mixture temperature that the mix is good on average does not have the difference in temperature, and the temperature that finally paves is not less than 130 ℃ after the jar is mixed to the intermittent type formula fully that the mix is even.
The utility model discloses the technical solution who adopts is:
a bituminous pavement temperature raising mixer comprises a temperature raising device, a material raising device, a storage bin and an intermittent mixing cylinder, wherein the material raising device is obliquely arranged, the temperature raising device is arranged at the bottom end of the material raising device, the storage bin is arranged at the top end of the material raising device, and the intermittent mixing cylinder is arranged below the storage bin;
the temperature raising device comprises a temperature raising cavity, wherein turning devices for turning and stirring the mixture are distributed at the bottom of the temperature raising cavity at intervals, a fan is arranged at the top of one end of the temperature raising cavity, an air return bin is arranged at an air inlet below the fan, and a burner is arranged at the top of the other end of the temperature raising cavity;
the material lifting device comprises a material lifting sealed pipeline, a material lifting device is arranged in the material lifting sealed pipeline, the bottom end of the material lifting sealed pipeline is communicated with a temperature lifting cavity, the top end of the material lifting sealed pipeline is communicated with a storage bin, an air return pipeline is tightly attached to the outer side of the material lifting sealed pipeline, one end of the air return pipeline is communicated with the storage bin, the other end of the air return pipeline is communicated with an air return bin, and an air outlet of a fan is communicated with an air inlet cavity of a combustor.
Preferably, the stirring device comprises a main shaft, stirring blades are arranged on the main shaft, and the main shafts of all the stirring devices are in transmission connection with the hydraulic motor through transmission chains.
Preferably, cooling fan blades are arranged outside the main shaft.
Preferably, the stirring blade comprises a stirring arm, one end of the stirring arm is provided with a stirring blade, the other end of the stirring arm is provided with external threads and fastening bolts, and the middle part of the stirring arm is provided with a cross hole.
Preferably, a dustproof grid mesh for preventing the mixture dust carried by the hot air from entering the fan is arranged between the temperature raising chamber and the fan.
Preferably, the heat-insulating material is attached to the outside of the lifting sealed pipeline.
The utility model has the beneficial technical effects that:
the utility model discloses can evenly raise the temperature to 140 ℃ -150 ℃ with scarify back old bituminous mixture, the bituminous mixture temperature that the mix is good on average does not have the difference in temperature, concentrates simultaneously to add multiple additive, mixes jar fully after the mix of intermittent type formula and finally paves the temperature and be not less than 130 ℃ to can better satisfy the temperature requirement of high quality regeneration bituminous pavement and modified asphalt pavement regeneration.
Drawings
The present invention will be further explained with reference to the following detailed description and accompanying drawings:
FIG. 1 is a schematic view of the overall structure of a temperature raising mixer according to the present invention;
FIG. 2 is a schematic view of the construction of the temperature raising mixer according to the present invention when adding new asphalt mixture;
FIG. 3 is a schematic view of the structure principle of the temperature raising mixer according to the present invention, showing the direction of hot wind;
FIG. 4 is a schematic view of the temperature raising operation of the temperature raising mixer of the present invention;
FIG. 5 is a schematic view of a three-dimensional structure of a temperature raising mixer according to the present invention;
FIG. 6 is a schematic view of the structure principle of the stirring device in the temperature raising mixer of the present invention;
FIG. 7 is a schematic structural view of a stirring blade of the temperature raising mixer of the present invention;
FIG. 8 is another side view of FIG. 7;
fig. 9 is a schematic structural view of the matching arrangement of a plurality of stirring blades in the stirring device of the present invention;
FIG. 10 is a schematic structural view of the material ridge shoveled and thrown by the turning and mixing blade of the present invention;
FIG. 11 is a schematic view of a three-dimensional structure of the middle temperature raising device of the present invention;
FIG. 12 is a schematic side view of the temperature raising device of the present invention;
FIG. 13 is a schematic view of the overall structure of the stirring cylinder and the stocker of the present invention;
fig. 14 shows a hopper door open state;
FIG. 15 is a schematic structural view of a stirring cylinder of the present invention;
fig. 16 shows the three-dimensional vortex motion state of the asphalt mixture in the mixing cylinder.
In the figure: 1-temperature raising device, 101-temperature raising chamber, 102-stirring device, 1021-main shaft, 1022-stirring blade, 1023-stirring arm, 1024-stirring blade, 1025-external thread, 1026-fastening bolt, 1027-cross hole, 103-fan, 104-return air bin, 105-burner, 106-return air pipeline, 2-material raising device, 201-sealing pipeline, 202-material raising device, 3-storage bin, 4-intermittent stirring cylinder, 401-stirring cylinder blade, 402-discharge port, 5-hydraulic motor, 6-cooling fan blade, 7-dustproof grid, 8-storage bin gate, 9-temperature raising mixer, 11-paver, 12-receiving hopper, 13-dump truck, 15-road surface washing plane, 16-new paved road surface and 17-external admixture nozzle.
Detailed Description
Combine the figure, a temperature raising mixing machine for bituminous paving hot in-place recycling, mix jar 4 including carrying temperature ware 1, carrying material device 2, storage silo 3 and intermittent type formula, carry 2 slopes of material device and arrange, carry temperature ware 1 and set up in the bottom of carrying material device 2, and storage silo 3 sets up on the top of carrying material device 2, and intermittent type formula mixes jar 4 setting in the below of storage silo. The temperature raising device 1 comprises a temperature raising cavity 101, a stirring device 102 for stirring a mixture is arranged at the bottom of the temperature raising cavity at intervals, a fan 103 is arranged at the top of one end of the temperature raising cavity, an air return bin 104 is arranged at an air inlet below the fan, and a burner 105 is arranged at the top of the other end of the temperature raising cavity. The material lifting device comprises a material lifting sealing pipeline 201, a material lifting device 202 is arranged inside the material lifting sealing pipeline, the bottom end of the material lifting sealing pipeline 201 is communicated with a temperature lifting cavity 101, the top end of the material lifting sealing pipeline 201 is communicated with a storage bin 3, an air return pipeline 106 is tightly attached to the outer side of the material lifting sealing pipeline, one end of the air return pipeline is communicated with the storage bin 3, the other end of the air return pipeline is communicated with an air return bin 104, and an air outlet of a fan is communicated with an air inlet cavity of a combustor. After heat exchange and temperature increase are completed in the temperature increasing device, the mixture is conveyed into the material storage device through the material increasing device, the mixture is continuously heated by hot air in the process of conveying the mixture by the material increasing device, the hot air flows back through the air return pipeline after the heat exchange process is completed, and at the moment, the shell of the material increasing sealing pipeline is heated and insulated by hot air waste heat.
As a further design of the present invention, the stirring device 102 includes a main shaft 1021, a stirring blade 1022 is provided on the main shaft 1021, and all main shafts of the stirring devices are in transmission connection with the hydraulic motor 5 through a transmission chain. The mixture is turned and stirred by the turning and stirring blade of the turning and stirring device and is always in a throwing state, the contact area of the mixture in the throwing state and hot air is increased, and the hot air is continuously heated to uniformly raise the temperature of the mixture.
Furthermore, the outer side of the main shaft is provided with cooling fan blades 6, and the cooling fan blades 6 rotate along with the main shaft to perform forced air cooling on the main shaft.
Further, the stirring blade 1022 includes a stirring arm 1023, one end of the stirring arm is provided with a stirring blade 1024, the other end of the stirring arm is provided with an external thread 1025 and a fastening bolt 1026, and a cross hole 1027 is arranged in the middle of the stirring arm.
Furthermore, four stirring arms 1023 are arranged in sequence on the circumferential direction of the cross section of the spindle, the adjacent stirring arms are distributed in a vertical cross mode, the stirring arms are matched and locked with each other, and are locked through fastening bolts, and the fastening bolts fasten a group of four stirring arms into a whole and are simultaneously locked with the spindle 1021.
Furthermore, a dustproof grid 7 used for preventing hot air carrying mixture dust from entering the fan is arranged between the temperature raising cavity and the fan, and the dustproof grid 7 is quickly inserted and disassembled.
Furthermore, the stocker and the intermittent mixing cylinder are separated by a stocker bin gate 8, and the stocker bin gate 8 is opened at intervals; the intermittent stirring cylinder 4 is provided with a stirring cylinder blade 401 inside and a discharge port 402 at the bottom.
Furthermore, a heat insulation material is attached to the outside of the material lifting sealing pipeline so as to enhance the heat insulation effect.
Furthermore, the temperature raising mixer 9 is positioned between the scarifier and the paver 11, a receiving hopper 12 is arranged at the front part of the temperature raising mixer, a dump truck 13 provides a new asphalt mixture into the receiving hopper, and a heater is arranged in front of the scarifier.
The utility model relates to a temperature raising mixing machine operating position is between scarify ware and paver, and the maximum speed of marcing of during operation is 4 meters/minute, and its work flow can briefly state as: the new asphalt mixture added by the receiving hopper and the material ridge formed by the scarifier are taken into the temperature raising device together, the mixture is conveyed into the material storage device by the material lifting device after being uniformly turned and stirred and heated by hot air provided by the temperature raising device, the external doping agent is simultaneously and intensively added into the material storage device, the material storage device and the stirring cylinder are intelligently controlled to complete intermittent stirring in a matching way, and finally the uniformly mixed regenerated asphalt mixture is put into the paver for paving.
The receiving hopper is supplied by the dump truck, when the old road surface causes the mixture of the original road surface to be lost due to ruts and other reasons, a part of new asphalt mixture can be supplemented through the receiving hopper, and the maximum 30 percent of the addition amount of the new asphalt mixture can be realized by adjusting the running speed of the scraping plate in the receiving hopper.
The temperature lifter is a core component of the equipment, and is internally provided with a stirring blade for throwing the mixture and a hot air heating system. When the mixture is taken into the temperature raising device, the turning and stirring blade is driven by the hydraulic motor to rotate and stir at a rotating speed of at least 80 revolutions per minute, and the L-shaped blade pockets and throws the asphalt mixture in the temperature raising device, so that the asphalt mixture is always in a floating and loose state; the hot air is blown out from the heating box above the temperature lifter to directly impact the thrown asphalt mixture for heating, the asphalt mixture in the throwing state has larger heat exchange contact area, and the mixture of the temperature lifter is always in the stirring state and is uniformly heated, so that the temperature of the asphalt mixture can be quickly and uniformly raised from 110-plus-120 ℃ to 140-plus-150 ℃ in a short time.
The asphalt mixture heated by the temperature raising device is sent into the material storage device by the material raising device, the whole material raising device is externally attached with a heat insulation material, and the bottom of the material raising device is provided with a waste heat return air pipeline for utilizing the waste heat of hot air in the temperature raising device. And the heat loss of the asphalt mixture in a material lifting device is reduced. The running speed of the lifting device is determined by the advancing speed and the scarification depth.
The material lifting device sends the regenerated asphalt mixture after uniform temperature lifting and hot air into the material storage device to be stored and added with the admixture, the material storage device is internally provided with a metering device and a plurality of admixture simultaneous adding devices, the admixture is accurately metered and added to the asphalt mixture entering the material storage device, the admixture is more accurate than the traditional mode of calculating the admixture amount of the regenerant through the traveling speed of a vehicle set, and the functionality is stronger.
The bin gate between the material storage device and the mixing cylinder is intelligently controlled to be opened and closed through a computer, when the mixed materials are being mixed in the mixing cylinder, the bin gate of the material storage device is closed to store the mixed materials and add an external additive, and after the mixed materials are uniformly mixed and discharged by the mixing cylinder, the bin gate of the material storage device is opened to place the mixed materials into the mixing cylinder, so that intermittent mixing is realized.
The stirring blades specially designed in the stirring cylinder can ensure that all the asphalt mixtures are subjected to three-dimensional vortex type stirring in the stirring cylinder, violent exchange is generated between the asphalt mixtures, the admixture and the asphalt mixtures are uniformly acted, and the admixture fully exerts the performance.
The asphalt reclaimed material which is mixed well by uniformly raising the temperature enters a receiving hopper of a paver to carry out paving and rolling operation, and the paving temperature is ensured to be not lower than 130 ℃.
The present invention will be further described with reference to the accompanying drawings, respectively:
fig. 1 shows that the temperature raising mixer of the utility model mainly comprises a receiving hopper, a temperature raising device, a material storage device, an external additive concentrated adding device, a mixing cylinder, a burner, a fan, a transmission device and other mechanisms.
FIG. 2 is a schematic diagram of construction of the temperature raising mixer when new asphalt mixture is added. The temperature raising mixer can meet the new asphalt mixture mixing ratio of 30 percent at most. The method comprises the steps of loading a new asphalt mixture into a receiving hopper by a self-discharging truck, adjusting the running speed by a scraper according to the addition amount of the new asphalt mixture determined by a thermal regeneration mix proportion test, feeding the new asphalt mixture and the scarified old materials into a temperature raising device together for stirring and raising the temperature, feeding the raised regenerated asphalt mixture into a material storage device by a material raising device, completing mixture mixing by matching with a mixing cylinder, and finally placing the material storage device into a paver for paving.
Fig. 3 is a hot air circulation utilization drawing, under the action of positive pressure guiding of a fan, hot air enters a temperature lifter from a combustion chamber, enters a material storage device after heat exchange is completed in the lifter, finally enters the fan through an air return pipeline on the wall of the material storage device, and is sent to a combustor again by the fan to participate in combustion.
Fig. 4 is a schematic diagram of the temperature raising process of the temperature raising device, wherein a stirring device for stirring the mixture is arranged in the temperature raising device, the power of the stirring device is driven by a hydraulic motor, and the hydraulic motor drives 4 main shafts through a transmission chain. The main shaft drives the stirring leaves to stir.
Firstly, the mixture is collected into the temperature raising device, the mixture is turned and stirred by the turning and stirring device blades and is always in a throwing state, hot air is continuously heated to uniformly raise the temperature of the mixture, the contact area of the mixture in the throwing state and the hot air is increased, the heat utilization efficiency is improved, the mixture stirred constantly is guaranteed to be uniformly raised in temperature, and the temperature difference is not generated in the mixture.
After the temperature of the mixture is changed in the temperature raising device, the mixture is conveyed into the material storage device through the material raising device, the mixture is continuously heated by hot air in the process, the material raising device is of a sealing structure, and the heat insulation material is attached to the material raising device, so that the heat loss of the mixture in the material raising process is reduced.
The stocker is started at regular time to put the reclaimed materials into the mixing cylinder, in the process, a small amount of hot air enters the mixing cylinder, the heat loss of the mixed materials in the mixing cylinder is reduced, and the temperature of the reclaimed materials during final paving is ensured.
After the heat exchange process is completed, hot air flows back through an air return pipeline on the wall of the material storage device, and at the moment, the shell of the material lifting device is heated by the hot air waste heat, so that the heat preservation work is further completed.
Fig. 5 is a three-dimensional schematic diagram of a temperature lifter and a material lifting device, wherein two sides of the material lifting device are respectively provided with an air return pipeline with an accurately calculated sectional area, so that the whole hot air heating system is ensured to work stably. The hot air passing through the air return pipeline returns to the combustor to continuously participate in combustion, so that the residual heat is fully utilized, and the generated asphalt smoke is combusted at high temperature, thereby achieving the purposes of environmental protection and energy conservation.
Fig. 6 shows a turning and mixing device of a temperature lifter, which is powered by hydraulic motors on two sides, wherein each hydraulic motor drives two main shafts through a transmission chain, and each main shaft is provided with 12 groups of turning and mixing units. The inclination angle of each group of stirring units is 30 degrees. The turning and mixing blades which are densely arranged enable the reclaimed materials to be in a throwing state all the time after entering the temperature raising device, so that the contact area of the mixed materials and hot air is greatly increased, and the temperature raising uniformity of the mixed materials is guaranteed. The main shaft outside all is equipped with the cooling flabellum, and the cooling flabellum follows the main shaft rotation and to the forced air cooling of main shaft, avoids providing power for the heat sink alone, reduces the overall energy consumption. The rotating speed of a hydraulic motor of the stirring device can be steplessly adjusted, and the corresponding rotating speed is adjusted according to the advancing speed of the vehicle set, so that the aim of uniformly throwing the mixture collected in the temperature raising device is fulfilled.
Fig. 7-9 are schematic structural views of the turning and stirring blade of the temperature lifter, and a fixed angle exists between the stirring blade and the stirring arm to lift the mixture to the maximum extent. The turning and mixing blade can be independently replaced by screwing out the fastening bolt at the bottom of the turning and mixing blade, and the turning and mixing blade is simple in structure, easy to disassemble and convenient to maintain. The stirring arms are mutually matched and locked, and a group of four stirring arms are fastened into a whole by bolts and are simultaneously locked with the stirring shaft. When the stirring blades are damaged, the stirring blades are detached and replaced. The turning and stirring blade and the main shaft both adopt wear-resistant steel as raw materials, so that the service life is prolonged.
Fig. 10 shows that when the temperature raising mixer advances, the material ridge is collected into the temperature raising mixer, the material ridge is shoveled and thrown into the air by the turning and mixing blade driven by the hydraulic motor, so that the contact area of the asphalt mixture and the hot air is maximized, the hot air is blown into the temperature raising mixer to contact with the thrown mixture for heat exchange, the lower mixture is continuously thrown by the turning and mixing blade, the mixture is always in a stirring state, the heating is average, and the temperature of the asphalt mixture is uniformly raised to the construction temperature.
FIG. 11 is a schematic diagram of a three-dimensional structure of a temperature raising mixer, the temperature raising mixer is an independent sleeve and is installed below a heating box through bolts, and the temperature raising mixer is simple to assemble and disassemble and convenient to overhaul.
Fig. 12 is that the kneck that return air duct got into the return air case is equipped with the dust screen, prevents that hot-blast mixture dust that carries from getting into fan and combustor, and the dust screen adopts and inserts the dismouting mode soon, and it is convenient to change.
Fig. 13-14 are overall schematic diagrams of a mixing cylinder and a material storage device, wherein the material lifting device feeds the asphalt mixture into the material storage device, a plurality of admixture can be simultaneously and intensively added in the material storage device, and the bin gate of the material storage device is opened at intervals to feed the asphalt mixture into the mixing cylinder for mixing.
15-16 are schematic views of a mixing cylinder with mixing blades arranged to provide three-dimensional vortex mixing of the mixture in the mixing cylinder; in the vortex exchange areas of the two stirring cycles, the asphalt materials are violently exchanged; the mixing time of 50 seconds can ensure that the admixture can fully exert the performance function, and the asphalt mixture has uniform temperature and good stability.
Parts not described in the above modes can be realized by adopting or referring to the prior art.
The basic principles and preferred embodiments of the present invention have been described above, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the structure of the present invention, and these should be considered as the protection scope of the present invention.