CN113186791A - In-situ heat regeneration unit capable of synchronously removing aging layer and laterally adding materials and construction method thereof - Google Patents
In-situ heat regeneration unit capable of synchronously removing aging layer and laterally adding materials and construction method thereof Download PDFInfo
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- CN113186791A CN113186791A CN202110316966.6A CN202110316966A CN113186791A CN 113186791 A CN113186791 A CN 113186791A CN 202110316966 A CN202110316966 A CN 202110316966A CN 113186791 A CN113186791 A CN 113186791A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
- E01C23/122—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus
- E01C23/127—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus rotary, e.g. rotary hammers
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0966—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0966—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving
- E01C23/0973—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving with liquid or semi-liquid materials, e.g. crack sealants
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/14—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces for heating or drying foundation, paving, or materials thereon, e.g. paint
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
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- Mining & Mineral Resources (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses an in-situ heat regeneration unit capable of synchronously realizing removal of an aging layer and lateral feeding and a construction method thereof, wherein the in-situ heat regeneration unit capable of synchronously realizing removal of the aging layer and lateral feeding comprises a hot air heater, a heating removal machine, an old asphalt aging layer transport vehicle, a heating milling machine, a new asphalt mixture transport vehicle, a feeding remixer and a paver; the hot air heater, the heating remover, the heating milling machine, the material adding remixer and the paver are sequentially arranged on the regeneration lane; the old asphalt aged layer transport vehicle and the new asphalt mixture transport vehicle are both positioned on a lateral lane of the regeneration lane, and the old asphalt aged layer transport vehicle receives the old asphalt aged layer conveyed by the heating remover; and the new asphalt mixture transport vehicle outputs the new asphalt mixture to the material adding remixer. The method can complete the removing operation of the aged layer of the asphalt pavement of 5-10 mm at one time, and can improve the quality of the reclaimed materials without step damage.
Description
Technical Field
The invention relates to the technical field of road maintenance equipment, in particular to a hot in-place recycling unit capable of synchronously removing an aging layer and laterally adding materials and a construction method thereof.
Background
The maintenance operation environment under the conditions of huge maintenance workload, high standard maintenance engineering quality and super-large traffic volume of national and provincial trunk roads, particularly expressways prompts us to seek a new maintenance mode, namely in-situ heat regeneration, which is a technology for realizing regeneration of old asphalt pavements within a certain depth range on the surface at one time by adopting special in-situ heat regeneration equipment to heat and mill asphalt pavements, then doping certain new asphalt mixtures, mixing, paving, rolling and the like.
At present, the existing on-site heat regeneration units at home and abroad mainly have the following defects:
(1) the asphalt pavement aging layer affects the regeneration quality. The surface layer of the asphalt pavement is aged and deteriorated after long-term sun exposure, wheel rolling and the like; in-situ thermal regeneration technology, a plurality of pavement heating machines are adopted to heat and soften the asphalt pavement, heating modes such as open fire, gas infrared, high-temperature hot air and the like are adopted to cause the aging and scorching of a material with the thickness of 5-10 mm on the surface layer of the asphalt pavement, once the asphalt material is aged and deteriorated, the performance of the asphalt material is difficult to recover, and no special equipment for continuously and uninterruptedly removing the aged layer of the asphalt pavement is seen in the market at present;
(2) the addition of new materials is difficult and the heat loss is large. The method comprises the following steps that an original asphalt pavement can be gathered to form a material pile with the thickness of 200-300 mm after being heated and milled, before a material transporting dump truck is used for adding materials, a plurality of pavement heating machines and a plurality of heating milling machines need to move forward for 20-30 m, then the dump truck is transported to stride over the thick material pile, the material pile is ridden on the material pile and fed into a hopper of a remixer, so that the remixer is frequently stopped to operate, after the feeding is finished, the thick material pile is rolled out, then the plurality of heating machines and the heating milling machines retreat and return to the original position, the operation is recovered, and the defects of difficult material adding, long interval time, large heat loss, poor regeneration flatness and the like exist in the material adding process;
(3) the single stirring device is influenced by the whole length, the stirring time is short, and the stirring uniformity is poor; in the market, the heating of the mixing tank mostly adopts an open fire or infrared heating mode, the heating temperature is not controllable, and the asphalt mixture is easily scorched and deteriorated;
(4) overcrowding, overweight, overrun. The overall size of the local heat regeneration unit in the market is huge, the weight exceeds the standard and the like, and climbing and transition are difficult.
The defects cause that the in-situ heat regeneration unit on the market cannot meet the requirements of safe maintenance and high-standard high-quality maintenance of modern asphalt pavements (particularly expressways and municipal roads).
Disclosure of Invention
Aiming at the problems, the invention provides the in-situ heat regeneration unit capable of synchronously removing the aged layer and laterally adding materials and the construction method thereof, which can complete the removing operation of the aged layer of the asphalt pavement of 5-10 mm at one time, realize stepless matching and damage and improve the quality of the regenerated materials.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a hot in-place recycling unit capable of synchronously removing an aged layer and laterally adding materials, which comprises a hot air heater, a heating remover, an old asphalt aged layer transport vehicle, a heating milling machine, a new asphalt mixture transport vehicle, a material adding remixer and a paver;
the hot air heater, the heating remover, the heating milling machine, the material adding remixer and the paver are sequentially arranged on the regeneration lane;
and the old asphalt aging layer transport vehicle and the new asphalt mixture transport vehicle are positioned on the lateral lanes of the regeneration lane and respectively close to the heating removing machine and the heating milling machine.
Optionally, the number of the hot air heating machines is 2-3, and the hot air heating machines are used for heating old asphalt pavements; every hot air heater includes hot air heater organism, is located a plurality of road surface heating walls that set up in order around hot air heater organism below, hot air heater's the most tail is equipped with the road surface heated board.
Optionally, the heating rejecting machine is used for rejecting and conveying an aged layer of the old asphalt pavement; the heating and removing machine comprises a heating and removing machine body, wherein at least two groups of pavement heating walls are arranged at the front part of the lower part of the heating and removing machine body, an aging layer removing device is arranged at the rear part of each pavement heating wall, a vertical scraping and conveying device is arranged at the rear part of each aging layer removing device, and a pavement heating wall and a pavement insulation board are sequentially arranged at the rear part of each vertical scraping and conveying device.
Optionally, the aging layer removing device comprises a fixing frame, a lifting frame, two groups of symmetrical lifting oil cylinders, a connecting rod, a raking material conveyor I, a sliding oil cylinder I, a raking material conveyor II and a sliding oil cylinder II;
the fixed frame is fixed on the frame;
the lifting frame is connected with the fixed frame through a parallelogram link mechanism;
the cylinder bodies and the piston rods of the two symmetrical groups of lifting oil cylinders are respectively in pin joint with the fixed frame and the lifting frame;
the scarification material conveyor I and the scarification material conveyor II are hung below the lifting frame in a relative mode;
a cylinder body and a piston rod of the sliding oil cylinder I are respectively in pin joint with the lifting frame and the scarification material conveyor I;
and a cylinder body and a piston rod of the sliding oil cylinder II are respectively in pin joint with the lifting frame and the scarification material conveyor II.
Optionally, the vertical scraping and conveying device comprises a left telescopic sleeve, a right telescopic cylinder, a left lifting sliding assembly, a right lifting sliding assembly, a left lifting cylinder, a right lifting cylinder, a vertical lifting frame, a scraping hopper chain, a driving shaft, a driven shaft, a supporting roller shaft, a discharge port, a receiving hopper, a slewing bearing and a spiral conveyer;
the outer cylinder of the left telescopic sleeve and the right telescopic sleeve is connected with the rack, and the inner cylinder is connected with the up-down lifting sliding component;
the cylinder body and the piston rod of the left and right telescopic oil cylinders are respectively in pin joint with the rack and the up-down lifting sliding assembly;
the vertical lifting frame is nested in the up-down lifting sliding assembly;
the cylinder body and the piston rod of the up-down lifting oil cylinder are respectively connected with the up-down lifting sliding assembly and the vertical lifting frame in a pin joint mode;
under the action of the left and right telescopic oil cylinders, the up-down lifting sliding assembly and the vertical lifting frame can realize left-right telescopic movement;
under the action of the up-down lifting oil cylinder, the vertical lifting frame can realize up-down height adjustment along the up-down lifting sliding component;
the scraper bucket chain is arranged in the vertical lifting frame;
the driving shaft, the riding wheel shaft and the driven shaft are arranged from top to bottom and are connected with the scraper bucket chain;
the discharge port is positioned at the top of the vertical lifting frame;
the spiral feeder is characterized in that the upper part of the spiral feeder is provided with a receiving hopper which is positioned below the discharge port, the spiral feeder is fixed on the vertical lifting frame through a slewing bearing, and the spiral feeder can realize circumferential slewing motion under the action of the slewing bearing, so that the feeding height and angle can be adjusted.
Optionally, the vertical scraping and conveying device of the heating and removing machine continuously conveys materials to an old asphalt aged layer transport vehicle located on a lateral lane, and the discharging height and length of the vertical scraping and conveying device are matched with a bin of the old asphalt aged layer transport vehicle.
Optionally, the heating milling machine is used for heating and milling old asphalt pavement after removing an aged layer; the heating milling and planing machine comprises a heating milling and planing machine body, wherein at least two groups of pavement heating walls are arranged at the front part of the lower part of the heating milling and planing machine body, a pavement milling and planing device is arranged behind the pavement heating walls, a regenerant spraying device is arranged in front of the pavement milling and planing device, and a regenerated material heating wall is arranged behind the pavement milling and planing device.
Optionally, the material adding remixer is used for continuously adding the new asphalt mixture laterally and remixing the new and old asphalt mixtures; the feeding remixer comprises a feeding remixer body, a lateral continuous feeding device is arranged at the front part of the feeding remixer body, and a bottom stirring device, an inclined scraper lifting device and an upper stirring device are sequentially arranged behind the lateral continuous feeding device.
Optionally, the lateral continuous feeding device of the feeding remixer continuously feeds materials to the regeneration lane, and the receiving height and length of the lateral continuous feeding device are matched with the discharge port of the bin of the new asphalt mixture transport vehicle.
In a second aspect, the present invention provides a construction method for a hot-in-place recycling unit capable of synchronously removing an aged layer and laterally adding materials, including:
heating an old asphalt pavement by using a pavement heating wall of a hot air heater, wherein the heating depth of the old asphalt pavement is a set first depth range value, the highest temperature of the surface layer of the old asphalt pavement is less than or equal to a set first temperature threshold, and the temperature at the first depth range value in the old asphalt pavement is greater than or equal to a set second temperature threshold;
continuously heating the old asphalt pavement by using a pavement heating wall of the heating and removing machine to ensure that the first depth range value and the second temperature threshold value reach the standard;
raking and removing the asphalt aged layer with a first depth range value of the heated old asphalt pavement by using an aged layer removing device of a heating removing machine, and conveying the asphalt aged layer to the lateral direction to form an aged layer material pile; vertically lifting and laterally conveying the aged layer material pile to a bin of an old asphalt aged layer transport vehicle by using a vertical scraping and conveying device of a heating and rejecting machine; the pavement heating wall and the pavement heat-insulation plate behind the vertical scraping and conveying device respectively heat and insulate the old asphalt pavement without the aged layer;
continuously heating the old asphalt pavement without the aged layer by using a pavement heating wall of the heating milling machine, wherein the heating depth of the old asphalt pavement is a set second depth range value, the highest temperature of the surface layer of the old asphalt pavement is less than or equal to a set second temperature threshold value, and the temperature at the second depth range value in the old asphalt pavement is greater than or equal to the set second temperature threshold value; secondly, spraying a regenerant on the heated old asphalt pavement by using a regenerant spraying device of a heating milling machine, then carrying out hot milling on the old asphalt pavement in a second depth range by using a pavement milling device to form a regenerated material pile, wherein the temperature of the regenerated material pile is greater than or equal to a third set temperature threshold value, and carrying out material distribution, heating and material collection on the regenerated material pile by using a regenerated material heating wall to realize secondary temperature increase of the regenerated material so that the temperature of the regenerated material is greater than or equal to a fourth set temperature threshold value;
a storage hopper of a lateral continuous feeding device of a feeding remixer is used for receiving a new asphalt mixture conveyed by a new asphalt mixture transport vehicle, and the accurate metering of the new asphalt mixture is realized by controlling the speed of a horizontal scraper at the bottom of the storage hopper and the opening degree of a discharge door; the method comprises the following steps of completing first-stage mixing of a regenerated material pile mixture and a new asphalt mixture by using a bottom-arranged mixing device of a material adding remixer to form a mixed material pile, and performing temperature compensation heating on the mixed material by using a hot air heating wall on the bottom-arranged mixing device when the temperature of the mixed material pile is less than a set fifth temperature threshold; the inclined scraper plate material lifting device continuously conveys a mixture pile into the upper stirring device, the second-stage full and uniform mixing of a regenerated material pile mixture and a new asphalt mixture is completed by the aid of the upper stirring device, the mixture is discharged to a receiving hopper of the paver, when the temperature of the mixture is smaller than a set sixth temperature threshold value, a hot air heating wall on the upper stirring device is used for performing temperature compensation heating on the mixture, and the average temperature of the heated mixture is larger than or equal to the sixth temperature threshold value; and then finishing material distribution and paving prepressing by a paver.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a double-stage hot scarification and material conveying spiral process is adopted, so that the removal operation of an aged layer of an asphalt pavement with the thickness of 5-10 mm is completed at one time, the damage is realized in a stepless matching manner, and the quality of reclaimed materials is improved; the process of a vertical scraping and lifting device and a rotary material conveying device is adopted, so that the lateral continuous conveying of the old asphalt mixture is realized, and the operation efficiency is improved; the novel structure of the two-stage slewing bearing and the two-stage material conveying screw is adopted to be matched with a semi-hanging type scraper conveying asphalt mixing vehicle for use, the semi-hanging type scraper conveying asphalt mixing vehicle is automatically arranged on a lateral lane of a regeneration lane, a discharge port is matched with a first material receiving hopper of lateral continuous feeding equipment, multi-degree-of-freedom and multi-direction feeding is realized, feeding is accurate and continuous, and the temperature drop of asphalt materials is small; the combined stirring process of the bottom stirring device and the top stirring device is adopted, so that sufficient stirring time of the asphalt mixture is ensured, and the stirring uniformity is ensured; the novel in-situ heat regeneration unit is not overweight and super-profiled, is flexible and convenient to transition, and realizes safe regeneration, high standard and high-quality regeneration.
Drawings
In order that the present invention may be more readily and clearly understood, reference is now made to the following detailed description of the invention taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the operational state of the present invention;
FIG. 2 is a schematic view of the hot air heater of the present invention;
FIG. 3 is a schematic view of a thermal rejection machine of the present invention;
fig. 4 is a schematic view of the heating planer of the present invention;
FIG. 5 is a schematic view of the construction of the topping remixer of the present invention;
FIG. 6 is a schematic diagram of an aging layer removing apparatus according to the present invention;
FIG. 7(a) is an overall schematic view of the vertical scraper conveyor of the present invention;
FIG. 7(b) is a front view of the vertical scraper conveyor of the present invention;
FIG. 7(c) is a sectional view A-A of FIG. 7 (b);
FIG. 8 is a schematic structural view of the lateral continuous feeding apparatus of the present invention;
fig. 9 is a state view of the hot blast heater according to the present invention in a transport state;
FIG. 10 is a transport state diagram of the thermal rejector of the present invention;
fig. 11 is a transport state view of the heating planer of the present invention;
FIG. 12 is a state view of the feeding remixer of the present invention in transport;
in the figure: 1. 1-1 parts of hot air heater, 1-2 parts of hot air heater body, 1-3 parts of pavement heating wall, 1-3 parts of pavement heat-insulating board, 2 parts of heating remover, 2-1 parts of heating remover body, 2-2 parts of ageing layer removing device, 2-3 parts of vertical scraping material conveying device, 3 parts of old asphalt ageing layer transport vehicle, 4 parts of heating milling machine, 4-1 parts of heating milling machine body, 4-2 parts of pavement milling machine body, 4-3 parts of regenerant spraying device, 4-4 parts of regenerated material heating wall, 5 parts of new asphalt mixture transport vehicle, 6 parts of adding remixer, 6-1 parts of adding remixer body, 6-2 parts of lateral continuous adding equipment, 6-3 parts of bottom stirring device, 6-4 parts of inclined scraping material lifting device, 6-5 parts of waste asphalt mixture conveying device, An overhead stirring device 7 and a paver; 2-2-1 parts of a lifting cylinder, 2-2-2 parts of a fixing frame, 2-2-3 parts of a lifting frame, 2-2-4 parts of a connecting rod, 2-2-5 parts of a rake-loosening spiral conveyor I, 2-2-6 parts of a sliding cylinder I, 2-2-7 parts of a rake-loosening spiral conveyor II, 2-2-8 parts of a sliding cylinder II, 2-3 parts of a rake-loosening spiral conveyor lifting device, 2-3-1 parts of a vertical lifting frame, 2-3-2 parts of a scraper bucket chain, 2-3-3 parts of a driving shaft, 2-3-4 parts of a driven shaft, 2-3-5 parts of a supporting wheel shaft, 2-3-6 parts of a discharge port, 2-3-7 parts of a receiving bucket, 2-3-8 parts of a rotary support, 2-3-9 parts of a spiral conveyor, 2-3-10 parts of a left telescopic sleeve, a right telescopic sleeve, 2-3-11 parts of a left telescopic oil cylinder, 2-3-12 parts of an up-down sliding component, 2-3-13 parts of an up-down lifting oil cylinder, 6-1-1 parts of a first material receiving hopper, 6-1-2 parts of a first material conveying unit, 6-1-3 parts of a first slewing bearing, 6-1-4 parts of a second material conveying unit, 6-1-5 parts of a second material receiving hopper, 6-1-6 parts of a second slewing bearing, 6-1-7 parts of a sliding frame, 6-1-8 parts of a material storage bin.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
Example 1
As shown in fig. 1 to 12, the in-situ heat regeneration unit capable of synchronously removing an aged layer and laterally adding materials of the invention comprises a hot air heater 1, a heating remover 2, an old asphalt aged layer transport vehicle 3, a heating milling machine 4, a new asphalt mixture transport vehicle 5, a material adding remixer 6 and a paver 7;
the hot air heater 1, the heating remover 2, the heating milling machine 4, the material adding remixer 6 and the paver 7 are positioned on a regeneration lane and are sequentially arranged from front to back; and the old asphalt aging layer transport vehicle 3 and the new asphalt mixture transport vehicle 5 are positioned on the lateral lanes of the regeneration lane and respectively close to the heating removing machine 2 and the heating milling machine 4.
As shown in fig. 2, 2-3 hot air heaters 1 are provided for heating old asphalt pavement; each hot air heater 1 comprises a hot air heater body 1-1 and a plurality of groups of pavement heating walls 1-2 which are arranged in sequence from front to back below the hot air heater body, and the rearmost part of each hot air heater 1 is provided with a pavement insulation board 1-3;
as shown in fig. 3, the heating rejecting machine 2 is used for rejecting and conveying an old asphalt pavement aged layer; the heating and removing machine 2 comprises a heating and removing machine body 2-1, at least two groups of pavement heating walls 1-2 are arranged at the front part below the heating and removing machine body 2-1, an ageing layer removing device 2-2 is arranged behind the pavement heating walls 1-2, a vertical scraping and conveying device 2-3 is arranged at the rear part of the ageing layer removing device 2-2, and the pavement heating walls 1-2 and the pavement insulation boards 1-3 are sequentially arranged behind the vertical scraping and conveying device 2-3; the vertical scraping and conveying device 2-3 of the heating and removing machine 2 continuously conveys materials to the lateral lane, and the discharging height and length of the vertical scraping and conveying device 2-3 are matched with a storage bin of the old asphalt aging layer transport vehicle 3.
As shown in fig. 6, the aging layer removing apparatus 2-2 includes: comprises a fixed frame 2-2-1, a lifting frame 2-2-2, a lifting oil cylinder 2-2-3, a connecting rod 2-2-4, a raking and loosening spiral material conveyor I2-2-5, a sliding oil cylinder I2-2-6, a raking and loosening spiral material conveyor II 2-2-7 and a sliding oil cylinder II 2-2-8, the fixed frame 2-2-1 is fixed on the frame 1, the lifting frame 2-2-2 is connected with the fixed frame 2-2-1 through four groups of connecting rods 2-2-4 to form a parallelogram connecting rod mechanism, the cylinder bodies and piston rods of the two groups of lifting oil cylinders 2-2-3 which are bilaterally symmetrical are respectively in pin joint with the fixed frame 2-2-1 and the lifting frame 2-2-2; the rake-loosening spiral conveyor I2-2-5 and the rake-loosening spiral conveyor II 2-2-7 are hung below the lifting frame 2-2-2 in tandem, a cylinder body and a piston rod of the sliding oil cylinder I2-2-6 are respectively connected onto the lifting frame 2-2-2 and the rake-loosening spiral conveyor I2-2-5 in a pin mode, and a cylinder body and a piston rod of the sliding oil cylinder II 2-2-8 are respectively connected onto the lifting frame 2-2-2 and the rake-loosening spiral conveyor II 2-2-7 in a pin mode. The invention adopts a new structure of a bidirectional sliding oil cylinder and a C-shaped slideway, realizes the extension and the folding of the raking loosening spiral conveyor, and realizes the variable-width operation by extending and folding the raking loosening spiral conveyor along with the change of the lane width.
As shown in fig. 7(a) - (c), the vertical scraping and conveying device 2-3 adopts a vertical scraping and lifting and rotary conveying process, so that the lateral continuous conveying of the old asphalt mixture is realized, and the operation efficiency is improved. The vertical scraping and lifting device 2-3 comprises a vertical lifting frame 2-3-1, a scraping hopper chain 2-3-2, a driving shaft 2-3-3, a driven shaft 2-3-4, a riding wheel shaft 2-3-5, a discharge port 2-3-6, a receiving hopper 2-3-7, a slewing bearing 2-3-8, a spiral material conveyer 2-3-9, a left telescopic sleeve 2-3-10, a left telescopic cylinder 2-3-11, a vertical lifting sliding component 2-3-12, a vertical lifting cylinder 2-3-13, an outer cylinder of the left telescopic sleeve 2-3-10 is connected with a frame 1, an inner cylinder is connected with the vertical lifting sliding component 2-3-12, the cylinder body and the piston rod of the left and right telescopic oil cylinders 2-3-11 are respectively connected with the frame 1 and the up-down lifting sliding component 2-3-12 by pins, the up-down lifting sliding component 2-3-12 is nested in the vertical lifting frame 2-3-1, the cylinder body and the piston rod of the up-down lifting oil cylinder 2-3-13 are respectively connected with the up-down lifting sliding component 2-3-12 and the vertical lifting frame 2-3-1 by pins, under the action of the left and right telescopic oil cylinders 2-3-11, the up-down lifting sliding component 2-3-12 and the vertical lifting frame 2-3-1 can realize left-right telescopic movement, and under the action of the up-down lifting oil cylinders 2-3-13, the vertical lifting frame 2-3-1 can realize up-down height adjustment along the up-down lifting sliding component 2-3-12; the scraper bucket chain 2-3-2 is arranged in the vertical lifting frame 2-3-1, the driving shaft 2-3-3, the riding wheel shaft 2-3-5 and the driven shaft 2-3-4 are arranged from top to bottom and are connected with the scraper bucket chain 2-3-2, the discharge port 2-3-6 is positioned at the top of the vertical lifting frame 2-3-1, the upper part of the spiral feeder 2-3-9 is provided with the connecting bucket 2-3-7 which is positioned below the discharge port 2-3-6, the spiral feeder 2-3-9 is fixed on the vertical lifting frame 2-3-1 through a slewing bearing 2-3-8, and the spiral feeder 2-3-9 can realize circular slewing motion under the action of the slewing bearing 2-3-8, the adjustment of the material conveying height and angle is realized.
As shown in fig. 4, the heating milling machine 4 is used for heating and milling old asphalt pavement after removing an aged layer; the heating milling machine 4 comprises a heating milling machine body 4-1, at least two sets of pavement heating walls 1-2 are arranged at the front part below the heating milling machine body 4-1, a pavement milling device 4-2 is arranged behind the pavement heating walls 1-2, a regenerant spraying device 4-3 is arranged in front of the pavement milling device 4-2, and a regenerant heating wall 4-4 is arranged behind the pavement milling device 4-2;
as shown in fig. 5, the material adding remixer 6 is used for continuously adding the new asphalt mixture laterally and remixing the new and old asphalt mixtures; the material adding remixer 6 comprises a material adding remixer body 6-1, a lateral continuous material adding device 6-2 is arranged at the front part of the material adding remixer body 6-1, and a bottom stirring device 6-3, an inclined scraper material lifting device 6-4 and an upper stirring device 6-5 are sequentially arranged behind the lateral continuous material adding device 6-2. And the lateral continuous feeding equipment 6-2 of the feeding remixer 6 continuously feeds materials to the regeneration lane, and the receiving height and the length of the lateral continuous feeding equipment 6-2 are matched with the discharge port of the material bin of the new asphalt mixture transport vehicle 5.
As shown in fig. 8, the lateral continuous charging apparatus 6-1 includes:
the device comprises a first material conveying unit 6-1-2, wherein a first material receiving hopper 6-1-1 is arranged at a material inlet of the first material conveying unit 6-1-2, particularly, the first material conveying unit 6-1-2 is positioned above the material inlet of the first material conveying unit 6-1-2, and the first material conveying unit 6-1-2 can be a first spiral material conveyor;
the second material conveying unit 6-1-3 is connected with the first material conveying unit 6-1-2 through a first rotary support 6-1-3, a feeding port of the second material conveying unit corresponds to a discharging port of the first material conveying unit 6-1-2, and a second spiral material conveyor can be selected as the second material conveying unit 6-1-4;
the second material receiving hopper 6-1-5 is positioned below the discharge port of the second material conveying unit 6-1-4, specifically, the second material conveying unit 6-1-4 is pinned to the second material receiving hopper 5, and the discharge port of the second material conveying unit 6-1-4 is positioned right above the second material receiving hopper 5;
the sliding frame 6-1-7 is connected with the second material receiving hopper 6-1-5 through a second rotary support 6-1-6;
the storage bin 6-1-8 is connected with the sliding frame 6-1-7, and a feeding port of the storage bin corresponds to a discharging port of the second receiving hopper 6-1-5 and is used for storing materials; in the specific implementation, the storage bins 6-1-8 can be V-shaped storage bins 6-1-8, and the cross section of the bottom is smaller than that of the top;
and the cylinder body of the amplitude variation oil cylinder 6-1-9 is connected with the second material receiving hopper 6-1-5, and the piston rod is connected with the second material conveying unit 6-1-4.
In conclusion, under the action of the amplitude-variable oil cylinder 6-1-9, the second material conveying unit 6-1-4 drives the first material conveying unit 2 and the first slewing bearing 6-1-3 to carry out amplitude-variable adjustment within the range of 45 degrees; under the action of the first slewing bearing 6-1-3, the first material receiving hopper 6-1-1 and the first material conveying unit 6-1-2 can realize 360-degree slewing operation at a maximum angle; under the action of the second slewing bearing 6-1-6, the second material conveying unit 6-1-4 can realize 180-degree slewing operation relative to the maximum angle.
Example 2
A construction method of a hot in-place recycling unit capable of synchronously removing an aging layer and laterally adding materials comprises the following steps:
step S1, heating the old asphalt pavement by using a plurality of groups of pavement heating walls 1-2 of the hot air heater 1; the heating depth of the old asphalt pavement is a set first depth range value (5-10 mm), the highest temperature of the surface layer of the old asphalt pavement is less than or equal to a set first temperature threshold value (180-200 ℃), and the temperature of the first depth range value in the old asphalt pavement is greater than or equal to a set second temperature threshold value (110-130 ℃);
step S2, heating the old asphalt pavement by using the pavement heating wall 1-2 of the heating remover 2 to ensure that the first depth range value (5-10 mm) and the second temperature threshold value (110-130 ℃) reach the standard; raking and removing an aged asphalt layer with a first depth range value (5-10 mm) of the heated old asphalt pavement by using an aged layer removing device 2-2 in a heating removing machine, and conveying the aged asphalt layer to the side direction to form an aged layer material pile; vertically lifting and laterally conveying the aged layer material pile to a material bin of an old asphalt aged layer transport vehicle 3 by using a vertical scraping and conveying device 2-3 in the heating and removing machine; the pavement heating wall 1-2 and the pavement heat-insulating plate 1-3 behind the vertical scraping and conveying device 2-3 respectively heat and insulate the old asphalt pavement without the aged layer;
step S3, the pavement heating wall 1-2 of the heating milling machine 4 is utilized to continuously heat the old asphalt pavement without the aged layer, the heating depth of the old asphalt pavement is a set second depth range value (40-50 mm), the highest temperature of the surface layer of the old asphalt pavement is less than or equal to a set second temperature threshold value (180-200 ℃), and the temperature of the second depth range value in the old asphalt pavement is greater than or equal to a set second temperature threshold value (110-130 ℃); then spraying a regenerant on the heated old asphalt pavement by using a regenerant spraying device 4-3 of a heating milling machine 4, then carrying out hot milling on the old asphalt pavement in a second depth range by using a pavement milling device 4-2 to form a regenerated material pile, wherein the temperature of the regenerated material pile is greater than or equal to a third set temperature threshold value (120-130 ℃), and the regenerated material heating wall 4-4 carries out material distribution, heating and material aggregation on the regenerated material pile to realize secondary temperature rise of the regenerated material so that the temperature of the regenerated material is greater than or equal to a fourth set temperature threshold value (130-140 ℃);
step S4, butt-jointing the receiving hopper of the lateral continuous feeding device 6-2 of the feeding remixer 6 with the discharge port of the bin of the new asphalt mixture transport vehicle 5, conveying the new asphalt mixture to the storage hopper of the feeding remixer 6 through a lateral feeding screw, and realizing accurate metering of the new asphalt mixture by controlling the speed of a horizontal scraper at the bottom of the storage hopper and the opening degree of a discharge door; the method comprises the following steps of utilizing a bottom-mounted stirring device 6-3 of a material adding remixer 6 to complete first-stage mixing of a regenerated material pile mixture and a new asphalt mixture to form a mixed material pile, and utilizing a hot air heating wall on the bottom-mounted stirring device 6-3 to perform temperature compensation heating on the mixed material when the temperature of the mixed material pile is smaller than a set fifth temperature threshold (140-150 ℃); the inclined scraper material lifting device 6-4 continuously conveys the mixed material pile into the upper stirring device 6-5, the second-stage full and uniform mixing of the regenerated material pile mixed material and the new green draining mixed material is completed by the upper stirring device 6-5, the mixed material is discharged to a receiving hopper of the spreading machine 7, when the temperature of the mixed material is lower than a set sixth temperature threshold (150-160 ℃), a hot air heating wall on the upper stirring device 6-5 is used for performing temperature supplementing heating on the mixed material, and the average temperature of the heated mixed material is greater than or equal to the sixth temperature threshold; and then, finishing material distribution and paving prepressing by a material distribution screw and a paving screed plate of a paver 7, and finally, compacting by a road roller to obtain the regenerated asphalt pavement.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
The invention provides a hot in-place recycling unit capable of synchronously realizing removal of an aged layer and lateral feeding, which adopts a two-stage hot scarification and material conveying spiral process to complete removal of the aged layer of an asphalt pavement with the thickness of 5-10 mm at one time, and has stepless matching damage, thereby improving the quality of recycled materials; the process of a vertical scraping and lifting device and a rotary conveying device is adopted, so that the lateral continuous and uninterrupted conveying of the old asphalt mixture is realized, and the operating efficiency is improved; the novel structure of the two-stage slewing bearing and the two-stage material conveying screw is adopted to be matched with a semi-hanging type scraper plate conveying asphalt mixing vehicle for use, the semi-hanging type scraper plate conveying asphalt mixing vehicle is automatically arranged on a lateral lane of a regeneration lane, a discharge port is matched with a first material receiving hopper of lateral continuous feeding equipment, multi-degree-of-freedom and multi-direction feeding is realized, feeding is accurate and continuous, and the temperature of asphalt materials is reduced; the combined stirring process of the bottom stirring device and the top stirring device is adopted, so that sufficient stirring time of the asphalt mixture is ensured, and the stirring uniformity is ensured; the novel in-situ heat regeneration unit is not overweight and super-profiled, is flexible and convenient to transition, and realizes safe regeneration, high standard and high-quality regeneration.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a can realize ageing layer rejection, side direction and add hot in situ regeneration unit of material in step which characterized in that: the device comprises a hot air heater, a heating and removing machine, an old asphalt aging layer transport vehicle, a heating and milling machine, a new asphalt mixture transport vehicle, a material adding remixer and a paver;
the hot air heater, the heating remover, the heating milling machine, the material adding remixer and the paver are sequentially arranged on the regeneration lane;
the old asphalt aged layer transport vehicle and the new asphalt mixture transport vehicle are both positioned on a lateral lane of the regeneration lane, and the old asphalt aged layer transport vehicle receives the old asphalt aged layer conveyed by the heating remover; and the new asphalt mixture transport vehicle outputs the new asphalt mixture to the material adding remixer.
2. The in-situ heat regeneration unit capable of synchronously realizing removal of an aged layer and lateral material addition according to claim 1, wherein the number of the hot air heaters is 2-3, and the hot air heaters are used for heating an old asphalt pavement; every hot air heater includes hot air heater organism, is located a plurality of road surface heating walls that set up in order around hot air heater organism below, hot air heater's the most tail is equipped with the road surface heated board.
3. The in-situ heat regeneration unit capable of synchronously realizing removal of an aging layer and lateral feeding according to claim 1, characterized in that: the heating remover is used for removing and conveying the old asphalt pavement aging layer; the heating and removing machine comprises a heating and removing machine body, wherein at least two groups of pavement heating walls are arranged on the front portion of the lower portion of the heating and removing machine body, an aging layer removing device is arranged behind the pavement heating walls, a vertical scraping and conveying device is arranged at the rear portion of the aging layer removing device, and a pavement heating wall and a pavement insulation board are sequentially arranged behind the vertical scraping and conveying device.
4. The in-situ heat regeneration unit capable of synchronously realizing removal of an aging layer and lateral feeding according to claim 3, characterized in that: the aging layer removing device comprises a fixing frame, a lifting frame, two groups of symmetrical lifting oil cylinders, a connecting rod, a raking material conveyor I, a sliding oil cylinder I, a raking material conveyor II and a sliding oil cylinder II;
the fixed frame is fixed on the frame;
the lifting frame is connected with the fixed frame through a parallelogram link mechanism;
the cylinder bodies and the piston rods of the two symmetrical groups of lifting oil cylinders are respectively in pin joint with the fixed frame and the lifting frame;
the scarification material conveyor I and the scarification material conveyor II are hung below the lifting frame in a relative mode;
a cylinder body and a piston rod of the sliding oil cylinder I are respectively in pin joint with the lifting frame and the scarification material conveyor I;
and a cylinder body and a piston rod of the sliding oil cylinder II are respectively in pin joint with the lifting frame and the scarification material conveyor II.
5. The in-situ heat regeneration unit capable of synchronously realizing removal of an aging layer and lateral feeding according to claim 3, characterized in that: the vertical scraping and conveying device comprises a left telescopic sleeve, a right telescopic cylinder, a left telescopic cylinder, a right telescopic cylinder, an up-down lifting sliding assembly, an up-down lifting cylinder, a vertical lifting frame, a scraping hopper chain, a driving shaft, a driven shaft, a riding wheel shaft, a discharge port, a receiving hopper, a slewing bearing and a spiral conveyer;
the outer cylinder of the left telescopic sleeve and the right telescopic sleeve is connected with the rack, and the inner cylinder is connected with the up-down lifting sliding component;
the cylinder body and the piston rod of the left and right telescopic oil cylinders are respectively in pin joint with the rack and the up-down lifting sliding assembly;
the vertical lifting frame is nested in the up-down lifting sliding assembly;
the cylinder body and the piston rod of the up-down lifting oil cylinder are respectively connected with the up-down lifting sliding assembly and the vertical lifting frame in a pin joint mode;
under the action of the left and right telescopic oil cylinders, the up-down lifting sliding assembly and the vertical lifting frame can realize left and right telescopic movement;
under the action of the up-down lifting oil cylinder, the vertical lifting frame can realize up-down height adjustment along the up-down lifting sliding component;
the scraper bucket chain is arranged in the vertical lifting frame;
the driving shaft, the riding wheel shaft and the driven shaft are arranged from top to bottom and are connected with the scraper bucket chain;
the discharge port is positioned at the top of the vertical lifting frame;
the spiral feeder is characterized in that the upper part of the spiral feeder is provided with a receiving hopper which is positioned below the discharge port, the spiral feeder is fixed on the vertical lifting frame through a slewing bearing, and the spiral feeder can realize circumferential slewing motion under the action of the slewing bearing, so that the feeding height and angle can be adjusted.
6. The in-situ heat regeneration unit capable of synchronously realizing removal of an aging layer and lateral feeding according to claim 3, characterized in that: the vertical scraping and conveying device of the heating and removing machine continuously conveys materials to an old asphalt aging layer transport vehicle positioned on a lateral lane, and the discharging height and length of the vertical scraping and conveying device are matched with a stock bin of the old asphalt aging layer transport vehicle.
7. The in-situ heat regeneration unit capable of synchronously realizing removal of an aging layer and lateral feeding according to claim 1, characterized in that: the heating milling machine is used for heating and milling old asphalt pavements after the aged layers are removed; the heating milling machine comprises a heating milling machine body, wherein the front part of the lower part of the heating milling machine body is at least provided with two groups of pavement heating walls, the rear part of each pavement heating wall is provided with a pavement milling device, the front part of each pavement milling device is provided with a regenerant spraying device, and the rear part of each pavement milling device is provided with a regenerant heating wall.
8. The in-situ heat regeneration unit capable of synchronously realizing removal of an aging layer and lateral feeding according to claim 1, characterized in that: the material adding remixer is used for continuously adding the new asphalt mixture in the lateral direction and remixing the new and old asphalt mixtures; the feeding remixer comprises a feeding remixer body, wherein a lateral continuous feeding device is arranged at the front part of the feeding remixer body, and a bottom stirring device, an inclined scraper lifting device and an upper stirring device are sequentially arranged behind the lateral continuous feeding device.
9. The in-situ heat regeneration unit capable of synchronously removing the aging layer and laterally adding materials according to claim 8, wherein the in-situ heat regeneration unit comprises: and the lateral continuous feeding equipment of the feeding remixer continuously feeds materials to the regeneration lane, and the receiving height and the length of the lateral continuous feeding equipment are matched with the discharge port of a bin of the new asphalt mixture transport vehicle.
10. The construction method of the in-situ heat regeneration unit capable of synchronously realizing removal of an aging layer and lateral feeding of the aging layer as claimed in any one of claims 1 to 9 is characterized by comprising the following steps:
heating an old asphalt pavement by using a pavement heating wall of a hot air heater, wherein the heating depth of the old asphalt pavement is a set first depth range value, the highest temperature of the surface layer of the old asphalt pavement is less than or equal to a set first temperature threshold, and the temperature at the first depth range value in the old asphalt pavement is greater than or equal to a set second temperature threshold;
continuously heating the old asphalt pavement by using a pavement heating wall of the heating and removing machine to ensure that the first depth range value and the second temperature threshold value reach the standard;
raking and removing the asphalt aged layer with a first depth range value of the heated old asphalt pavement by using an aged layer removing device of a heating removing machine, and conveying the asphalt aged layer to the lateral direction to form an aged layer material pile; vertically lifting and laterally conveying the aged layer material pile to a bin of an old asphalt aged layer transport vehicle by using a vertical scraping and conveying device of a heating and rejecting machine; the pavement heating wall and the pavement heat-insulation plate behind the vertical scraping and conveying device respectively heat and insulate the old asphalt pavement without the aged layer;
continuously heating the old asphalt pavement without the aged layer by using a pavement heating wall of the heating milling machine, wherein the heating depth of the old asphalt pavement is a set second depth range value, the highest temperature of the surface layer of the old asphalt pavement is less than or equal to a set second temperature threshold value, and the temperature at the second depth range value in the old asphalt pavement is greater than or equal to the set second temperature threshold value; secondly, spraying a regenerant on the heated old asphalt pavement by using a regenerant spraying device of a heating milling machine, then carrying out hot milling on the old asphalt pavement in a second depth range by using a pavement milling device to form a regenerated material pile, wherein the temperature of the regenerated material pile is greater than or equal to a third set temperature threshold value, and carrying out material distribution, heating and material collection on the regenerated material pile by using a regenerated material heating wall to realize secondary temperature raising of the regenerated material so that the temperature of the regenerated material is greater than or equal to a fourth set temperature threshold value;
a storage hopper of a lateral continuous feeding device of a feeding remixer is used for receiving a new asphalt mixture conveyed by a new asphalt mixture transport vehicle, and the accurate metering of the new asphalt mixture is realized by controlling the speed of a horizontal scraper at the bottom of the storage hopper and the opening degree of a discharge door; the method comprises the following steps of completing first-stage mixing of a regenerated material pile mixture and a new asphalt mixture by using a bottom-arranged stirring device of a material adding remixer to form a mixed material pile, and performing temperature compensation heating on the mixed material by using a hot air heating wall on the bottom-arranged stirring device when the temperature of the mixed material pile is less than a set fifth temperature threshold; the inclined scraper plate material lifting device continuously conveys a mixture pile into the upper stirring device, the second-stage full and uniform mixing of a regenerated material pile mixture and a new asphalt mixture is completed by the upper stirring device, the mixture is discharged to a receiving hopper of the paver, when the temperature of the mixture is lower than a set sixth temperature threshold value, a hot air heating wall on the upper stirring device is used for performing temperature compensation heating on the mixture, and the average temperature of the heated mixture is higher than or equal to the sixth temperature threshold value; and then finishing material distribution and paving prepressing by a paver.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113914179A (en) * | 2021-10-26 | 2022-01-11 | 鄂尔多斯市路泰公路工程有限责任公司 | Asphalt pavement softening and repairing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113914179A (en) * | 2021-10-26 | 2022-01-11 | 鄂尔多斯市路泰公路工程有限责任公司 | Asphalt pavement softening and repairing machine |
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