CN111254790A - Highway road surface crack repair equipment - Google Patents
Highway road surface crack repair equipment Download PDFInfo
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- CN111254790A CN111254790A CN202010100079.0A CN202010100079A CN111254790A CN 111254790 A CN111254790 A CN 111254790A CN 202010100079 A CN202010100079 A CN 202010100079A CN 111254790 A CN111254790 A CN 111254790A
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- fixedly connected
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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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
Abstract
The invention discloses a highway pavement crack repairing device which comprises a base, wherein roller carriers are fixedly connected to two sides of the bottom of the base, rollers are rotatably connected to the bottom ends of the roller carriers through rotating shafts, a fixing box is fixedly connected to the center of the top of the base, the top of the fixing box is communicated with a mixing box, a cover plate is installed at the top of the mixing box, and a first motor box is fixedly connected to the center of the top of the cover plate. Through heating the pipeline power, can heat the inner wall of mixing box, and then conduct the heat to the pitch of mixing the stirring at the mixing box inner chamber, heat up for the pitch, reduce the hardness of pitch, thereby road surface repair's convenience has been improved greatly, the planarization after the road surface repair has been improved simultaneously, the setting through the second motor simultaneously, the second motor can drive the screw delivery leaf through carrying the axle and rotate, the volume of pitch when can controlling the repair crack, the waste of pitch has been avoided.
Description
Technical Field
The invention relates to the technical field of highway engineering, in particular to a highway pavement crack repairing device.
Background
The highway engineering structure includes: roadbed, road surface, bridge, culvert, tunnel, drainage system, safety protection facility, greening and traffic monitoring facility, and house, workshop and other service facilities used for construction, maintenance and monitoring, the road surface includes cement concrete, asphalt concrete, gravel and gravel material that various asphalts were disposed, gravel or gravel mixture and lump material of mixing soil, asphalt concrete road surface has been the highway road surface commonly used today, after asphalt road surface uses for a long time, can because the vehicle overloads, lack maintenance reason such as the damage can appear in the road surface, damage such as crack, cave in, influence the roughness on road surface and travelling comfort of driving, if not carry out road surface repair in time, can influence driving safety and even take place the traffic accident, consequently, the crack and the damaged department on road surface need in time to repair.
The existing pavement crack repairing equipment can not heat asphalt in the using process, asphalt caking is easily caused under a low-temperature environment, the pavement is not easy to repair, and the repaired pavement smoothness is poor, therefore, the pavement crack repairing equipment for the highway is provided, in addition, although heating modules are simultaneously arranged at the periphery and the inside of an asphalt heating cylinder body in the existing partial solution, in the actual asphalt heating process, because the heights of materials added into the asphalt cylinder are different every time, and heating wires or heating rods in the heating modules are uniformly arranged, the stacking heights of asphalt materials in the asphalt heating cylinder are different, the distances between partial heating wires in the heating modules and the asphalt materials are far, and along with the proceeding of the heating process, the heights of the materials are further reduced after the asphalt is melted into fluid, and the defect is more obvious, thereby seriously affecting the heating efficiency and causing waste of heating.
Disclosure of Invention
The present invention is directed to a road surface crack repairing apparatus to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a highway road surface crack repair equipment, includes the base, the equal fixedly connected with gyro wheel frame in both sides of base bottom, the bottom of gyro wheel frame is rotated through the pivot and is connected with the gyro wheel, the fixed case of center department fixedly connected with at base top, the top intercommunication of fixed case has the mixing box, the apron is installed at the top of mixing box, the first motor case of fixedly connected with is located at the center at apron top, is provided with ultrasonic sensor in the bottom of apron, the first motor of inner chamber fixedly connected with of first motor case, the output shaft fixedly connected with (mixing) shaft of first motor, this (mixing) shaft comprises fixed section and the fixed section two parts of fixed section of fixed connection in the vertical direction, and wherein the top of automatically controlled scalable section is connected to the output shaft of first motor, and the bottom of the magnetic ring is provided with near the top of automatically controlled scalable section and be close to the output shaft bottom department of first motor on automatically controlled scalable section The periphery of the magnetic ring is close to the heating pipeline, the surface of the fixed section of the stirring shaft is fixedly connected with a plurality of stirring blades, and the stretching action of the electric control telescopic section of the stirring shaft responds to the output signal of the ultrasonic sensor;
a feed inlet penetrates through the right side of the top of the cover plate, a heat preservation shell is sleeved on the surface of the cover plate, a heating pipeline is spirally and slidably connected with the inner cavity of the heat preservation shell in a wrapping mode, the heating pipeline is spirally arranged on the surface of the mixing box, the inner wall of the heating pipeline is in sliding contact with the outer wall of the mixing box, the heating pipeline comprises a first spiral section and a second spiral section, a magnetic block is embedded in the first spiral section, the second spiral section is a heating section spirally arranged on the surface of the mixing box,
the right side fixedly connected with second motor case of fixed case, the inner chamber fixedly connected with second motor of second motor case, the output shaft fixedly connected with of second motor carries the axle, the fixed surface of carrying the axle is connected with the spiral delivery leaf, the left side fixedly connected with of fixed case carries a section of thick bamboo, the bottom fixedly connected with of a section of thick bamboo of carrying expects the pipe.
As further preferable in the present technical solution: the right side fixedly connected with fan at base top, the air inlet end intercommunication of fan has the air-supply line, the air-out end intercommunication of fan has the exhaust pipe.
As further preferable in the present technical solution: the right side of base top fixedly connected with handrail, the top fixedly connected with handle on handrail right side.
As further preferable in the present technical solution: the inner cavity of the mixing box is communicated with the inner cavity of the fixed box, the inner cavity of the fixed box is communicated with the inner cavity of the conveying cylinder, and the inner cavity of the conveying cylinder is communicated with the inner cavity of the discharging pipe.
As further preferable in the present technical solution: the left end of the conveying shaft penetrates through the inner cavity of the conveying cylinder and is connected with the conveying cylinder in a rotating mode, and the left end of the spiral conveying blade penetrates through the inner cavity of the conveying cylinder.
As further preferable in the present technical solution: the left side of the front surface of the heat preservation shell is fixedly connected with a switch, and the electrical input ends of the fan, the heating pipeline, the first motor and the second motor are electrically connected with the electrical output end of the switch.
Compared with the prior art, the invention has the beneficial effects that: 1. according to the invention, the telescopic rotating shaft with the magnetic ring is matched with the specially designed double-material spiral heating structure, so that the efficient heating under the condition of self-adaption to material accumulation with different heights can be realized while uniform heating is realized; 2. through heating the pipeline power, can heat the inner wall of mixing box, and then conduct the heat to the pitch of mixing the stirring at the mixing box inner chamber, heat up for the pitch, reduce the hardness of pitch, thereby road surface repair's convenience has been improved greatly, the planarization after the road surface repair has been improved simultaneously, the setting through the second motor simultaneously, the second motor can drive the screw delivery leaf through carrying the axle and rotate, the volume of pitch when can controlling the repair crack, the waste of pitch has been avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the mixing box and delivery cartridge of the present invention;
FIG. 3 is a schematic sectional view of the thermal insulating case of the present invention.
In the figure: 1. a base; 2. a discharge pipe; 3. a delivery cartridge; 4. a cover plate; 5. a mixing box; 6. a first motor case; 7. a feed inlet; 8. a heat preservation shell; 9. a fan; 10. an air inlet pipe; 11. a handrail; 12. a roller frame; 13. a roller; 14. an exhaust duct; 15. a fixed box; 16. a delivery shaft; 17. a spiral conveying blade; 18. a heating line; 19. a first motor; 20. a stirring shaft; 21. stirring blades; 22. a second motor case; 23. a second motor; 24. and (4) switching.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1-3, the present invention provides a technical solution: a highway pavement crack repairing device comprises a base 1, wherein roller carriers 12 are fixedly connected to two sides of the bottom of the base 1, rollers 13 are rotatably connected to the bottom end of each roller carrier 12 through rotating shafts, a fixed box 15 is fixedly connected to the center of the top of the base 1, the top of the fixed box 15 is communicated with a mixing box 5, a cover plate 4 is installed at the top of the mixing box 5, a first motor box 6 is fixedly connected to the center of the top of the cover plate 4, an ultrasonic sensor is arranged at the bottom of the cover plate 4, a first motor 19 is fixedly connected to the inner cavity of the first motor box 6, a stirring shaft 20 is fixedly connected to the output shaft of the first motor 19, the stirring shaft 20 consists of an electric control telescopic section and a fixed section which are fixedly connected in the vertical direction, the top end of the electric control telescopic section is connected to the output shaft of the first motor 19, the bottom end of the electric control telescopic section is connected to the top end of the fixed section, a magnetic ring is arranged near the top end of the electric control telescopic section and near the bottom end of the output shaft of the first motor 19, the peripheral circumference of the magnetic ring is close to the heating pipeline 18, the surface of the fixed section of the stirring shaft 20 is fixedly connected with a plurality of stirring blades 21, and the telescopic action of the electric control telescopic section of the stirring shaft 20 responds to the output signal of the ultrasonic sensor;
a feed inlet 7 penetrates through the right side of the top of the cover plate 4, a heat preservation shell 8 is sleeved on the surface of the cover plate 4, a heating pipeline 18 is connected to the inner cavity of the heat preservation shell 8 in a spiral sliding and covering mode, the heating pipeline 18 is arranged on the surface of the mixing box 5 in a spiral mode, the inner wall of the heating pipeline 18 is in sliding contact with the outer wall of the mixing box 5, the heating pipeline 18 comprises a first spiral section and a second spiral section, a magnetic block is embedded in the first spiral section, the second spiral section is a heating section which is arranged on the surface of the mixing box 5 in a spiral mode,
fixed case 15's right side fixedly connected with second motor case 22, the inner chamber fixedly connected with second motor 23 of second motor case 22, the output shaft fixedly connected with of second motor 23 carries axle 16, the fixed surface of carrying axle 16 is connected with spiral delivery leaf 17, fixed case 15's left side fixedly connected with carries section of thick bamboo 3, the row of material pipe 2 of the bottom fixedly connected with of carrying section of thick bamboo 3.
In this embodiment, specifically: the right side fixedly connected with fan 9 at base 1 top, the air inlet end intercommunication of fan 9 has air-supply line 10, and the air-out end intercommunication of fan 9 has exhaust pipe 14, through above setting, can blow the dust of crack department clean earlier, improves the efficiency and the intensity of repairing.
In this embodiment, specifically: the right side fixedly connected with handrail 11 at base 1 top, the top fixedly connected with handle on handrail 11 right side through above setting, can the person of facilitating the use promote this equipment. In addition, the concrete is as follows: the inner cavity of the mixing box 5 is communicated with the inner cavity of the fixed box 15, the inner cavity of the fixed box 15 is communicated with the inner cavity of the conveying cylinder 3, and the inner cavity of the conveying cylinder 3 is communicated with the inner cavity of the discharging pipe 2.
In this embodiment, specifically: the left end of the conveying shaft 16 penetrates through the inner cavity of the conveying cylinder 3 and is rotatably connected with the conveying cylinder 3, and the left end of the spiral conveying blade 17 penetrates through the inner cavity of the conveying cylinder 3.
In this embodiment, specifically: the switch 24 is fixedly connected to the left side of the front surface of the heat preservation shell 8, and the electrical input ends of the fan 9, the heating pipeline 18, the first motor 19 and the second motor 23 are electrically connected with the electrical output end of the switch 24.
In this embodiment, specifically: the model of the first motor 19 is Y180M-2, the model of the second motor 23 is Y160L-2, and the model of the fan 9 is GDF 4.0-8.
Working principle or structural principle, when in use, firstly, the ultrasonic sensor arranged at the bottom of the cover plate 4 is opened, the first motor 19 drives the stirring shaft 20 to rotate, the stirring shaft 20 drives the stirring blade 21 to rotate in the inner cavity of the mixing box 5, so as to mix and stir the asphalt mixture in the inner cavity of the mixing box 5, meanwhile, the heating pipeline 18 is connected with a power supply, so as to heat the inner wall of the mixing box 5, further transfer heat to the asphalt mixed and stirred in the inner cavity of the mixing box 5, heat the asphalt, reduce the hardness of the asphalt, greatly improve the convenience of pavement repair, improve the smoothness of the repaired pavement, simultaneously, the second motor 23 can drive the spiral conveying blade 17 to rotate through the conveying shaft 16 by opening the second motor 23, the spiral conveying blade 17 conveys the asphalt to the crack through the discharge pipe 2, the amount of asphalt in the process of repairing the crack can be controlled, and the waste of asphalt is avoided. Wherein in the above-mentioned specific heating step in the heating and conveying process, the ultrasonic sensor monitors the height of the asphalt material in real time, then adjusts the length of the electrically-controlled retractable section on the stirring shaft 20 in real time, if the height of the asphalt material is reduced, the length of the electrically-controlled retractable section on the stirring shaft 20 is lengthened, so that the magnetic ring arranged near the top end of the electrically-controlled retractable section and near the bottom end of the output shaft of the first motor 19 is lowered synchronously, the magnetic ring attracts the first spiral section in the heating line 18 to be lowered synchronously, thereby driving the heating line 18 of the whole spiral structure to be lowered and compressed, even if the first spiral section and the second spiral section are also compressed synchronously, the distance between the first spiral section and the second spiral section is reduced, the heating density is increased, thereby realizing the heating density adapted to the same height of the material, the process is not only adapted to different heights of the material at the beginning stage, but also automatically adapt to the real-time reduction of height caused by melting of materials in the middle and later heating periods.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a highway road surface crack repair equipment, includes base (1), its characterized in that: the automatic stirring device is characterized in that roller carriers (12) are fixedly connected to two sides of the bottom of the base (1), rollers (13) are rotatably connected to the bottom end of each roller carrier (12) through rotating shafts, a fixed box (15) is fixedly connected to the center of the top of the base (1), a mixing box (5) is communicated with the top of the fixed box (15), a cover plate (4) is installed at the top of the mixing box (5), a first motor box (6) is fixedly connected to the center of the top of the cover plate (4), an ultrasonic sensor is arranged at the bottom of the cover plate (4), a first motor (19) is fixedly connected to the inner cavity of the first motor box (6), a stirring shaft (20) is fixedly connected to the output shaft of the first motor (19), the stirring shaft (20) is composed of an electric control telescopic section and a fixed section which are fixedly connected in the vertical direction, and the top end of the electric control telescopic section is connected to the output, the bottom end of the electric control telescopic section is connected to the top end of the fixed section, a magnetic ring is arranged near the top end of the electric control telescopic section and close to the bottom end of an output shaft of a first motor (19), the peripheral circumference of the magnetic ring is close to the heating pipeline (18), a plurality of stirring blades (21) are fixedly connected to the surface of the fixed section of the stirring shaft (20), and the telescopic action of the electric control telescopic section of the stirring shaft (20) responds to an output signal of the ultrasonic sensor;
a feed inlet (7) penetrates through the right side of the top of the cover plate (4), a heat preservation shell (8) is sleeved on the surface of the cover plate (4), a heating pipeline (18) is connected to the inner cavity of the heat preservation shell (8) in a spiral sliding and coating mode, the heating pipeline (18) is arranged on the surface of the mixing box (5) in a spiral mode, the inner wall of the heating pipeline (18) is in sliding contact with the outer wall of the mixing box (5), the heating pipeline (18) comprises a first spiral section and a second spiral section, a magnetic block is embedded in the first spiral section, the second spiral section is a heating section which is arranged on the surface of the mixing box (5) in a spiral mode,
the right side fixedly connected with second motor case (22) of fixed case (15), the inner chamber fixedly connected with second motor (23) of second motor case (22), output shaft fixedly connected with of second motor (23) carries axle (16), the fixed surface of carrying axle (16) is connected with spiral delivery leaf (17), the left side fixedly connected with of fixed case (15) carries a section of thick bamboo (3), row's of bottom fixedly connected with material pipe (2) of carrying a section of thick bamboo (3).
2. The apparatus for repairing a crack in a road surface according to claim 1, wherein: the right side fixedly connected with fan (9) at base (1) top, the air inlet end intercommunication of fan (9) has air-supply line (10), the air-out end intercommunication of fan (9) has exhaust pipe (14).
3. The apparatus for repairing a crack in a road surface according to claim 1, wherein: the right side of base (1) top fixedly connected with handrail (11), the top fixedly connected with handle on handrail (11) right side.
4. The apparatus for repairing a crack in a road surface according to claim 1, wherein: the heating pipeline (18) is spirally arranged on the surface of the mixing box (5), and the inner wall of the heating pipeline (18) is in contact with the mixing box (5).
5. The apparatus for repairing a crack in a road surface according to claim 1, wherein: the inner cavity of the mixing box (5) is communicated with the inner cavity of the fixed box (15), the inner cavity of the fixed box (15) is communicated with the inner cavity of the conveying cylinder (3), and the inner cavity of the conveying cylinder (3) is communicated with the inner cavity of the discharge pipe (2).
6. The apparatus for repairing a crack in a road surface according to claim 1, wherein: the left end of the conveying shaft (16) penetrates through the inner cavity of the conveying cylinder (3) and is rotationally connected with the conveying cylinder (3), and the left end of the spiral conveying blade (17) penetrates through the inner cavity of the conveying cylinder (3).
7. The apparatus for repairing a crack in a road surface according to claim 2, wherein: the left side fixedly connected with switch (24) on heat preservation shell (8) obverse surface, the electrical property input end of fan (9), heating pipeline (18), first motor (19) and second motor (23) all with the electrical property output end electric connection of switch (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010100079.0A CN111254790A (en) | 2020-02-18 | 2020-02-18 | Highway road surface crack repair equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010100079.0A CN111254790A (en) | 2020-02-18 | 2020-02-18 | Highway road surface crack repair equipment |
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| Publication Number | Publication Date |
|---|---|
| CN111254790A true CN111254790A (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010100079.0A Withdrawn CN111254790A (en) | 2020-02-18 | 2020-02-18 | Highway road surface crack repair equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN111254790A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111910498A (en) * | 2020-08-19 | 2020-11-10 | 山东鼎鲁建筑有限公司 | Road and bridge crack prosthetic devices |
| CN112030694A (en) * | 2020-09-10 | 2020-12-04 | 中海外交通建设有限公司 | Highway road surface crack patching device |
| CN112663517A (en) * | 2020-12-17 | 2021-04-16 | 申继伦 | Bridge crack repairing device |
| CN113846536A (en) * | 2021-01-28 | 2021-12-28 | 安徽科技学院 | Intelligent asphalt mixture spreader capable of achieving real-time paving monitoring |
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| JP2012202182A (en) * | 2011-03-28 | 2012-10-22 | Sumitomo (Shi) Construction Machinery Co Ltd | Construction machine for pavement |
| CN203955192U (en) * | 2014-06-27 | 2014-11-26 | 罗开义 | The sugar dissolving kettle of producing for dairy products |
| CN204544056U (en) * | 2015-01-25 | 2015-08-12 | 宁波大学 | A kind of magnetic agitation still of improvement |
| CN204715164U (en) * | 2015-04-22 | 2015-10-21 | 天津康远工程机械有限公司 | The temperature automatically controlled charging gear of paver |
| CN205474771U (en) * | 2016-04-08 | 2016-08-17 | 郑州煤矿机械制造技工学校 | Damaged pavement patching machine of pitch |
| CN207805488U (en) * | 2017-12-29 | 2018-09-04 | 广东怡康环保实业有限公司 | A kind of efficient mixed stirring device for sewage disposal |
| CN209703241U (en) * | 2018-12-29 | 2019-11-29 | 山东欧亚专用车辆有限公司 | Pitch sprinkling car |
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2020
- 2020-02-18 CN CN202010100079.0A patent/CN111254790A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012202182A (en) * | 2011-03-28 | 2012-10-22 | Sumitomo (Shi) Construction Machinery Co Ltd | Construction machine for pavement |
| CN203955192U (en) * | 2014-06-27 | 2014-11-26 | 罗开义 | The sugar dissolving kettle of producing for dairy products |
| CN204544056U (en) * | 2015-01-25 | 2015-08-12 | 宁波大学 | A kind of magnetic agitation still of improvement |
| CN204715164U (en) * | 2015-04-22 | 2015-10-21 | 天津康远工程机械有限公司 | The temperature automatically controlled charging gear of paver |
| CN205474771U (en) * | 2016-04-08 | 2016-08-17 | 郑州煤矿机械制造技工学校 | Damaged pavement patching machine of pitch |
| CN207805488U (en) * | 2017-12-29 | 2018-09-04 | 广东怡康环保实业有限公司 | A kind of efficient mixed stirring device for sewage disposal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111910498A (en) * | 2020-08-19 | 2020-11-10 | 山东鼎鲁建筑有限公司 | Road and bridge crack prosthetic devices |
| CN112030694A (en) * | 2020-09-10 | 2020-12-04 | 中海外交通建设有限公司 | Highway road surface crack patching device |
| CN112663517A (en) * | 2020-12-17 | 2021-04-16 | 申继伦 | Bridge crack repairing device |
| CN113846536A (en) * | 2021-01-28 | 2021-12-28 | 安徽科技学院 | Intelligent asphalt mixture spreader capable of achieving real-time paving monitoring |
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Application publication date: 20200609 |