CN113684746A - Pavement maintenance device for road construction - Google Patents
Pavement maintenance device for road construction Download PDFInfo
- Publication number
- CN113684746A CN113684746A CN202111023879.8A CN202111023879A CN113684746A CN 113684746 A CN113684746 A CN 113684746A CN 202111023879 A CN202111023879 A CN 202111023879A CN 113684746 A CN113684746 A CN 113684746A
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- China
- Prior art keywords
- heating plate
- control device
- vehicle body
- ground
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- E01C23/096—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 forming, opening-out, cleaning, drying or heating and filling
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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
- E01C23/03—Arrangements for curing paving; Devices for applying curing means; Devices for laying prefabricated underlay, e.g. sheets, membranes; Protecting paving under construction or while curing, e.g. use of tents
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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
- E01C23/098—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 and working the surface of the filling or applying particulate material thereto, e.g. smoothing, gritting
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Road Repair (AREA)
Abstract
The application relates to a road surface curing means is used in highway traffic engineering construction. The road surface maintenance device for the construction of the highway traffic engineering comprises a vehicle body, a heating plate, a driving device and a control device. The heating plate is movably arranged at the bottom of the vehicle body. The heating plate can move in the horizontal direction and the vertical direction at the bottom of the vehicle body. The driving device is arranged on the vehicle body and is connected with the heating plate through a driving shaft. The driving device is used for controlling the heating plate to move in the vertical direction and the horizontal direction at the bottom of the vehicle body. And a pressure sensor is arranged on the surface of the heating plate close to the ground. The pressure sensor is connected with the control device. That is, a pressure signal sensed by the pressure sensor may be transmitted to the control device.
Description
Technical Field
The application relates to public transport early warning field especially relates to a road surface curing means for road construction.
Background
Asphalt pavement is a common highway pavement. However, after the asphalt pavement is used for a long time, the asphalt pavement can be broken and collapsed, which brings inconvenience to people going out and even causes traffic accidents. Therefore, the repair of the asphalt pavement which is used for a long time is a necessary construction process. However, the existing construction equipment is generally low in construction efficiency.
Disclosure of Invention
In view of the above, it is necessary to provide a road surface maintenance device for road construction.
A pavement maintenance device for highway traffic engineering construction comprises,
a vehicle body;
the heating plate is movably arranged at the bottom of the vehicle body;
the driving device is arranged on the vehicle body, is connected with the heating plate through a driving shaft and is used for controlling the heating plate to move in the vertical direction and the horizontal direction at the bottom of the vehicle body;
the control device is connected with the driving device and the heating plate;
the surface of the heating plate close to the ground is provided with a pressure sensor, and the pressure sensor is connected with the control device;
the driving device is used for controlling the heating plate to be close to and contact with the ground to be maintained through the driving shaft, when a pressure signal measured by the pressure sensor reaches a first preset value, the control device controls the heating plate to be heated, and when a pressure signal measured by the pressure sensor reaches a second preset value, the control device controls the heating plate to be lifted through the driving device, wherein the second preset value is smaller than the first preset value.
In one embodiment, a plurality of cutting knives are further arranged on the surface, close to the ground, of the heating plate at intervals, the control device is connected with the driving motor for controlling the cutting knives, after the heating plate rises to a preset height, the control device controls the cutting knives to rotate and be close to the ground to be maintained to cut the ground to be maintained, and when the cutting knives rotate, the control device controls the heating plate to rotate.
In one embodiment, the road surface maintenance device for road traffic engineering construction further comprises a guide rail disc, the guide rail disc is arranged at the bottom of the vehicle body and provided with a cross-shaped guide rail, the driving shaft is arranged on the cross-shaped guide rail, and the control device controls the heating disc to move in the horizontal direction of the cross-shaped guide rail through the driving device.
In one embodiment, the heating plate further comprises an asphalt nozzle which is arranged on the surface of the heating plate close to the ground.
In one embodiment, the vehicle body is provided with an asphalt storage tank, and the asphalt nozzle is connected with the asphalt storage tank through a flexible pipeline.
In one embodiment, the cutting knife retracts the heating plate after the heating plate is raised to a preset position, and the pitch nozzle extends from the surface of the heating plate.
The embodiment of the application provides a road surface curing means is used in highway traffic engineering construction. The road surface maintenance device for the construction of the highway traffic engineering comprises a vehicle body, a heating plate, a driving device and a control device. The heating plate is movably arranged at the bottom of the vehicle body. That is, the heating pan is movable in the horizontal direction and the vertical direction at the bottom of the vehicle body. The driving device is arranged on the vehicle body and is connected with the heating plate through a driving shaft. The driving device is used for controlling the heating plate to move in the vertical direction and the horizontal direction at the bottom of the vehicle body. The driving device can be a motor or a plurality of motors which are matched to drive the heating plate to move along the horizontal direction or the vertical direction at the bottom of the vehicle body. The control device is connected with the driving device and the heating plate. The control device can be a processor such as a PLC. The control device may be provided to the vehicle body. And a pressure sensor is arranged on the surface of the heating plate close to the ground. The pressure sensor is connected with the control device. That is, a pressure signal sensed by the pressure sensor may be transmitted to the control device.
The driving device is used for controlling the heating plate to be close to and contact with the ground to be maintained through the driving shaft. After the ground to be maintained is determined, the control device can send an instruction to the driving device, and the driving device drives the driving shaft to enable the heating plate to be close to the ground to be maintained. When the pressure signal measured by the pressure sensor reaches a first preset value, the heating plate is indicated to be in contact with the ground at the moment. The control device controls the heating plate to heat. Along with the heating plate temperature is higher and higher, the temperature on the ground is higher and higher, and the asphalt can also gradually become soft and melt. When the pressure signal measured by the pressure sensor reaches a second preset value, the asphalt is melted and softened to a certain degree. That is, the second preset value becomes smaller than the first preset value. Indicating that the asphalt pavement to be repaired has reached a level at which it can be removed. At the moment, the control device controls the heating plate to rise through the driving device, and heating is stopped. Therefore, the steps of cutting and shoveling the asphalt pavement can be carried out, and the efficiency of maintaining the pavement is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a road surface maintenance device for road construction according to an embodiment of the present application;
FIG. 2 is a bottom view of the heating plate provided by the embodiments of the present application;
FIG. 3 is a side view of a heating plate provided by an embodiment of the present application;
FIG. 4 is a side view of a heating plate provided by an embodiment of the present application;
figure 5 is a side view of a heating plate provided by embodiments of the present application.
Description of reference numerals:
road surface maintenance device 10 for highway traffic engineering construction
An asphalt storage bin 300.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1 and 2, an embodiment of the present application provides a road surface maintenance device 10 for road traffic engineering construction. The pavement maintenance device 10 for highway traffic engineering construction comprises a vehicle body 100, a heating plate 110, a driving device 120 and a control device. The heating plate 110 is movably disposed at the bottom of the vehicle body 100. That is, the heating plate 110 can move in the horizontal direction and the vertical direction at the bottom of the vehicle body 100. The driving unit 120 is provided in the vehicle body 100 and is connected to the heating plate 110 via a driving shaft 122. The driving means 120 is used for controlling the heating plate 110 to move in the vertical direction and the horizontal direction at the bottom of the vehicle body 100. The driving device 120 may be a motor, or may be a combination of multiple motors, and drives the heating plate 110 to move in the horizontal direction or the vertical direction at the bottom of the vehicle body 100. The control means is connected to the driving means 120 and the heating plate 110. The control device can be a processor such as a PLC. The control device may be provided to the vehicle body 100. The surface of the heating plate 110 near the ground is provided with a pressure sensor 124. The pressure sensor 124 is connected to the control device. That is, a pressure signal sensed by the pressure sensor 124 may be transmitted to the control device.
The driving device 120 is used for controlling the heating plate 110 to approach and contact the ground to be repaired through the driving shaft 122. When it is determined that the floor surface to be repaired is ready, the control device may send a command to the driving device 120, and the driving device 120 drives the driving shaft 122 so that the heating plate 110 approaches the floor surface to be repaired. When the pressure signal measured by the pressure sensor 124 reaches a first preset value, it indicates that the heating plate 110 has contacted the ground. The control means controls the heating plate 110 to be heated. As the heating plate 110 becomes warmer and warmer, the temperature of the ground becomes warmer and warmer, and the asphalt will gradually soften and melt. When the pressure signal measured by the pressure sensor 124 reaches a second preset value, it indicates that the asphalt has melted and softened to a certain extent. That is, the second preset value becomes smaller than the first preset value. Indicating that the asphalt pavement to be repaired has reached a level at which it can be removed. At this time, the control device controls the heating plate 110 to rise through the driving device 120, and stops heating. Therefore, the steps of cutting and shoveling the asphalt pavement can be carried out, and the efficiency of maintaining the pavement is greatly improved.
It is understood that the driving means may include a plurality of driving motors, and the driving motors may move the driving shaft 122 up or down.
Referring to fig. 3, in one embodiment, a plurality of cutting blades 130 are further disposed at intervals on the surface of the heating plate 110 close to the ground. The control device is connected with the driving motor for controlling the cutting knife 130. The driving motor may drive the cutting knife 130 to move in a vertical direction. When the heating plate 110 rises to a preset height, the control device controls the cutting knife 130 to rotate and cut the ground to be repaired close to the ground to be repaired. Because the ground has softened, the cutting blade 130 is now close to the ground and rotated to cut the asphalt pavement to be repaired. While the cutting knife 130 rotates, the driving device 120 may also control the heating plate 110 to rotate, so as to achieve sufficient cutting and crushing of the asphalt pavement. It will be appreciated that each of the cutting knives may correspond to a motor. The synchronous operation of a plurality of motors can drive the cutting knife to rotate simultaneously.
After cutting, the crushed asphalt can be removed by a shovel or a scraper.
Referring to fig. 3, in one embodiment, the road surface maintenance device 10 for road traffic engineering construction further includes a guide rail plate 200. The rail plate 200 is disposed at the bottom of the vehicle body 100. The guide plate 200 is provided with cross guides 210. The driving shaft 122 is disposed on the cross rail 210, and the control device controls the heating plate 110 to move in the horizontal direction of the cross rail 210 through the driving device 120. Thereby enabling the heating pan 110 to be moved over any position of the ground to be repaired. After the heating pan 110 is moved above the ground to be repaired, the control means controls the heating pan 110 to descend by the driving shaft 122. The driving means 120 may comprise a servo motor. The heating plate 110 can be controlled by a servo motor to move in the horizontal direction of the cross guide 210. The cross guide rail can also be provided with a sliding block. The slider can be driven to move on the cross rail 210 by a motor. The heating plate 110 may be provided to the slider.
In one embodiment, the road maintenance device 10 for road traffic engineering construction further includes an asphalt nozzle 220. The pitch nozzle 220 is disposed on the surface of the heating plate 110 near the ground. After the asphalt pavement is crushed and cleaned, the asphalt nozzle 220 can spray asphalt to the pavement to be repaired, and the heating plate 110 can be controlled to be pressed down, so that the new asphalt pavement is finished.
In one embodiment, the vehicle body 100 is provided with an asphalt storage tank 300, and the asphalt nozzle 220 is connected to the asphalt storage tank 300 through a flexible pipe 113.
Referring to fig. 4, in one embodiment, after the heating plate 110 is raised to a predetermined position, the cutting knife 130 retracts the heating plate 110. The pitch nozzle 220 can be controlled by a motor to protrude from the surface of the heating plate 110. At this time, the control device may control the asphalt spraying nozzle 220 to spray asphalt to the road surface to be repaired by controlling the compression pump. The vehicle body 100 can keep a static state in the whole repairing process, the repairing position is more accurately positioned, and the local repairing effect of the road surface is better.
Referring to fig. 5, it can be understood that the heating plate 110 can be provided with a circular hole 111. The pitch nozzle 220 extends from the heater plate. The circular hole and the outer wall of pitch nozzle 220 may be connected by bearing 112. That is, when the heating plate 110 rotates, the pitch nozzle 220 may not rotate along with the heating plate 110 and may be kept in a relatively stationary state, and thus, a problem that the pitch nozzle 220 is easily twisted due to the rotation of the heating plate 110 can be avoided. The rail plate 200 may be provided with a through hole, and the flexible pipe 113 may be connected to the asphalt storage tank 300 through the through hole.
Those skilled in the art will appreciate that the manner in which the above-described embodiments are implemented may be implemented by a computer program that can be stored in a non-volatile computer-readable storage medium and that, when executed, can include the processes of the above-described embodiments of the methods. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A pavement maintenance device for highway traffic engineering construction is characterized by comprising,
a vehicle body;
the heating plate is movably arranged at the bottom of the vehicle body;
the driving device is arranged on the vehicle body, is connected with the heating plate through a driving shaft and is used for controlling the heating plate to move in the vertical direction and the horizontal direction at the bottom of the vehicle body;
the control device is connected with the driving device and the heating plate;
the surface of the heating plate close to the ground is provided with a pressure sensor, and the pressure sensor is connected with the control device;
the driving device is used for controlling the heating plate to be close to and contact with the ground to be maintained through the driving shaft, when a pressure signal measured by the pressure sensor reaches a first preset value, the control device controls the heating plate to be heated, and when a pressure signal measured by the pressure sensor reaches a second preset value, the control device controls the heating plate to be lifted through the driving device, wherein the second preset value is smaller than the first preset value.
2. The road surface maintenance device for road traffic engineering construction according to claim 1, wherein a plurality of cutting knives are further arranged on the surface of the heating plate close to the ground at intervals, the control device is connected with the driving motor for controlling the cutting knives, when the heating plate is lifted to a preset height, the control device controls the cutting knives to rotate and close to the ground to be maintained for cutting the ground to be maintained, and the control device controls the heating plate to rotate while the cutting knives rotate.
3. The road surface maintenance device for road traffic engineering construction according to claim 2, further comprising a guide rail disc, wherein the guide rail disc is arranged at the bottom of the vehicle body, the guide rail disc is provided with a cross guide rail, the driving shaft is arranged on the cross guide rail, and the control device controls the heating disc to move in the horizontal direction of the cross guide rail through the driving device.
4. The device for maintaining a road surface for road traffic engineering construction according to claim 3, further comprising an asphalt spraying nozzle provided on a surface of the heating plate adjacent to the ground.
5. A road surface maintenance device for road traffic engineering construction according to claim 4, wherein said vehicle body is provided with an asphalt storage tank, and said asphalt nozzle is connected to said asphalt storage tank through a flexible pipe.
6. The road surface maintenance device for road traffic engineering construction according to claim 5, wherein the cutting knife retracts into the heating plate after the heating plate is raised to a preset position, and the asphalt spraying nozzle protrudes from the surface of the heating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111023879.8A CN113684746B (en) | 2021-09-02 | 2021-09-02 | Pavement maintenance device for road construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111023879.8A CN113684746B (en) | 2021-09-02 | 2021-09-02 | Pavement maintenance device for road construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113684746A true CN113684746A (en) | 2021-11-23 |
| CN113684746B CN113684746B (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111023879.8A Active CN113684746B (en) | 2021-09-02 | 2021-09-02 | Pavement maintenance device for road construction |
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| Country | Link |
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| CN (1) | CN113684746B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201024374Y (en) * | 2006-12-18 | 2008-02-20 | 广东省长大公路工程有限公司 | Simple asphalt pavement microwave heating vehicle |
| CN201050036Y (en) * | 2007-04-29 | 2008-04-23 | 美的集团有限公司 | Height Sensing and Limiting Device of Asphalt Road Maintenance Vehicle |
| CN102787548A (en) * | 2012-08-30 | 2012-11-21 | 重庆交通大学 | In-site heating regeneration maintenance vehicle for asphalt pavements |
| CN104452533A (en) * | 2014-12-01 | 2015-03-25 | 长安大学 | Harrowing device capable of simultaneously heating old asphalt concrete |
-
2021
- 2021-09-02 CN CN202111023879.8A patent/CN113684746B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201024374Y (en) * | 2006-12-18 | 2008-02-20 | 广东省长大公路工程有限公司 | Simple asphalt pavement microwave heating vehicle |
| CN201050036Y (en) * | 2007-04-29 | 2008-04-23 | 美的集团有限公司 | Height Sensing and Limiting Device of Asphalt Road Maintenance Vehicle |
| CN102787548A (en) * | 2012-08-30 | 2012-11-21 | 重庆交通大学 | In-site heating regeneration maintenance vehicle for asphalt pavements |
| CN104452533A (en) * | 2014-12-01 | 2015-03-25 | 长安大学 | Harrowing device capable of simultaneously heating old asphalt concrete |
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| Publication number | Publication date |
|---|---|
| CN113684746B (en) | 2023-05-09 |
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