CN114635337A - Quick prosthetic devices of concrete road surface - Google Patents
Quick prosthetic devices of concrete road surface Download PDFInfo
- Publication number
- CN114635337A CN114635337A CN202210318015.7A CN202210318015A CN114635337A CN 114635337 A CN114635337 A CN 114635337A CN 202210318015 A CN202210318015 A CN 202210318015A CN 114635337 A CN114635337 A CN 114635337A
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- China
- Prior art keywords
- slurry
- guide rail
- concrete pavement
- strip
- slurry distribution
- 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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- 239000002002 slurry Substances 0.000 claims abstract description 48
- 238000007790 scraping Methods 0.000 claims abstract description 14
- 230000037303 wrinkles Effects 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 241000272814 Anser sp. Species 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 239000003973 paint Substances 0.000 abstract description 2
- 201000010099 disease Diseases 0.000 description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 241000561734 Celosia cristata Species 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 210000001520 comb Anatomy 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The application discloses a quick concrete pavement repairing device which comprises a moving platform, wherein the moving platform is provided with a slurry distributing mechanism; the moving platform is provided with a height adjusting mechanism, the moving platform is provided with a guide rail, the slurry laying mechanism is provided with a corresponding guide rail wheel, and the slurry laying mechanism is provided with a floating structure. The trowelling structure comprises a slurry distribution scraper, and a plurality of trowelling strips are arranged behind the slurry distribution scraper. The middle section of the slurry distribution scraper plate protrudes forwards in a wild goose row shape, and the left section and the right section are both provided with zigzag wrinkles; the trowelling strip comprises a scraping strip, the middle section of the scraping strip protrudes forwards to form an goose-shaped shape, and the bottom of the scraping strip is connected with a backward horizontal folding edge. The beneficial effects of this scheme can learn according to the statement to above-mentioned scheme, simple structure, reasonable in design to the road surface that has the crack or skinning, can evenly apply paint with a brush repairing agent thick liquids and trowel to can accomplish the restoration to the concrete road surface fast, because throwing the material trowelling is all accomplished automatically moreover, not only save the manual work, improved efficiency moreover.
Description
Technical Field
The invention relates to the field of asphalt pavement maintenance, in particular to a quick repairing device for a concrete pavement.
Background
The concrete pavement has high occurrence rate, defects and the like, is a common problem of concrete pavement surface layer diseases, the diseases generated on the concrete pavement need to be repaired in time, and for the treatment of the concrete pavement diseases, the prior method comprises the steps of paving the uniformly-stirred concrete pavement repair slurry at the positions with the diseases and then leveling the concrete pavement repair slurry, at present, the stirring, paving and leveling of the concrete pavement repair slurry are carried out manually, the inventor finds that the mode has high labor intensity, long consumed time and low working efficiency, the stirring uniformity of the concrete pavement repair slurry is not good, the repair slurry is not uniform in pavement, the repair effect on the concrete pavement diseases is poor, and the pavement of the concrete pavement repair slurry needs to be finished within set time, so the requirement on the skill level of a repairer is high, the labor cost is increased.
Disclosure of Invention
The invention provides a concrete pavement quick repairing device which has simple structure and reasonable design, can evenly coat and smear repairing agent slurry on a cracked or skinned pavement so as to quickly finish repairing the concrete pavement, and can save labor and improve efficiency because the feeding and the plastering are automatically finished.
In order to achieve the aim, the invention provides a quick concrete pavement repairing device which comprises a moving platform, wherein the moving platform is provided with a slurry distributing mechanism;
the slurry distributing mechanism is provided with a floating structure.
First cross beams are arranged at two ends of the guide rail to form a first rectangular frame;
a longitudinal beam is arranged above the guide rail, a second cross beam is arranged above the first cross beam, and the longitudinal beam and the second cross beam form a second rectangular frame;
a first upright post is arranged between the first cross beam and the second cross beam, and a second upright post is connected to the outer sides of the guide rail and the longitudinal beam, so that a rectangular frame is formed by the guide rail, the first rectangular frame and the second giant frame.
The height adjusting mechanism comprises a third upright column arranged on the outer side of the guide rail and the longitudinal beam, the third upright column is provided with a guide seat, the guide seat is connected with a guide post in a sliding manner, the lower end of the guide post is provided with a wheel seat, and the wheel seat is movably connected with a roller;
the guide holder threaded connection has the threaded rod, the threaded rod lower extreme contact the wheel seat, the threaded rod is provided with the hand wheel.
The slurry distributing mechanism also comprises a charging barrel, and the bottom of the charging barrel is provided with a discharge valve;
the feed cylinder is provided with rabbling mechanism, rabbling mechanism is including being provided with the grudging post at feed cylinder top, the grudging post middle section is provided with first motor, first motor drive is connected with the reduction gear, reduction gear lower extreme transmission is connected with first pivot, first pivot lower extreme is connected with the spiral arm, the spiral arm is provided with a plurality of second motors, second motor lower extreme transmission is connected with the puddler.
The stirring rod is provided with a spiral groove.
The middle section of the vertical frame is sunken downwards.
The guide rail wheel is connected with a supporting plate, and the supporting plate is connected with the charging barrel;
the supporting plate is further provided with a third motor, and the third motor is in transmission connection with the guide rail wheel.
The floating structure is arranged on the lower side of the supporting plate;
the trowelling structure is located the rear of feed cylinder, the trowelling structure includes the link, the link lower extreme is provided with thick liquids distribution scraper blade, thick liquids distribution scraper blade rear is provided with a plurality of trowelling strips.
The middle section of the slurry distribution scraper plate protrudes forwards in a wild goose row shape, and the left section and the right section are both provided with zigzag wrinkles;
the trowelling strip comprises a scraping strip, the middle section of the scraping strip protrudes forwards to form an goose-shaped shape, and the bottom of the scraping strip is connected with a backward horizontal folding edge;
the troweling strip is lower than the slurry distribution scraper in height;
the further the trowel strip is from the slurry distribution screed, the smaller the height.
The slurry distribution scraper blade is connected with the transverse bar with the top of the trowelling strip, a fourth upright column is arranged on the upper side of the transverse bar, and the fourth upright column is connected with the supporting plate.
When the floating structure is used, the movable platform is arranged at a set place, and the four rollers are adjusted so that the floating structure is proper in height. Typically, the slurry distribution mechanism is now located at the rear end of the guide rail. And (4) putting the materials into the charging barrel, and starting the first motor and the second motor to start stirring. Since the material may contain stone and cement components, blade-type stirring is less reliable because the stirring rod is a vertical rod provided with a spiral groove. And because the stirring rod is too thin, the stirring rod can rotate around the axis of the charging barrel, so that the stirring efficiency can be improved.
Stirring to be suitable, opening the bleeder valve, starting the third motor, the guide rail wheel moves to guide rail the place ahead, and then the while is discharged the material and is screeded.
The goose-row shape of the slurry distribution scraper is beneficial to the slurry to diffuse to two sides; simultaneously, because thick liquids distribution scraper blade is provided with cockscomb structure fold to prevent that thick liquids from all sliding to both sides and leading to the middle section to lay inadequately.
The floating-up wild goose is in a smooth relative sliding state for floating up, so that the fold crack caused by floating up and pressing is avoided.
The latter screed bars have a smaller height, thereby progressively compacting the slurry.
The beneficial effects of this scheme can learn according to the statement to above-mentioned scheme, simple structure, reasonable in design to the road surface that has the crack or skinning, can evenly apply paint with a brush repairing agent thick liquids and trowel to can accomplish the restoration to the concrete road surface fast, because throwing the material trowelling is all accomplished automatically moreover, not only save the manual work, improved efficiency moreover.
Drawings
FIG. 1 is a schematic diagram of the mechanism of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
FIG. 3 is a top view of the slurry placement mechanism of the present invention.
Fig. 4 is a schematic structural diagram of the floating structure of the present invention.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a schematic diagram of the construction of the trowel strip of the present invention.
In the figure, 1, a mobile platform; 2. a slurry distribution mechanism; 3. a height adjustment mechanism; 4. a guide rail; 5. a guide rail wheel; 6. leveling the structure; 7. a first cross member; 8. a stringer; 9. a second cross member; 10. a first upright post; 11. a second upright; 12. a third column; 13. a guide seat; 14. a guide post; 15. a wheel seat; 16. a roller; 17. a threaded rod; 18. a hand wheel; 19. a charging barrel; 20. a discharge valve; 21. a stirring mechanism; 22. erecting a frame; 23. a first motor; 24. a speed reducer; 25. a first rotating shaft; 26. a swing arm; 27. a second motor; 28. a stirring rod; 29. a support plate; 30. a third motor; 31. a slurry distribution scraper; 32. leveling the strips; 33. scraping the strips; 34. folding edges; 35. a horizontal bar; 36. and a fourth upright post.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in fig. 1-4, the present embodiment is a device for quickly repairing a concrete pavement, which includes a moving platform 1, wherein the moving platform 1 is provided with a slurry arrangement mechanism 2;
the moving platform 1 is provided with a height adjusting mechanism 3, the moving platform 1 is provided with a guide rail 4, the slurry laying mechanism 2 is provided with a corresponding guide rail wheel 5, and the slurry laying mechanism 2 is provided with a floating structure 6.
Wherein, two ends of the guide rail 4 are provided with first beams 7 to form a first rectangular frame;
a longitudinal beam 8 is arranged above the guide rail 4, a second cross beam 9 is arranged above the first cross beam 7, and the longitudinal beam 8 and the second cross beam 9 form a second rectangular frame;
a first upright post 10 is arranged between the first cross beam 7 and the second cross beam 9, and a second upright post 11 is connected to the outer sides of the guide rail 4 and the longitudinal beam 8, so that a rectangular frame is formed by the first upright post, the first rectangular frame and the second giant frame.
The height adjusting mechanism 3 comprises a third upright post 12 arranged on the outer side of the guide rail 4 and the longitudinal beam 8, the third upright post 12 is provided with a guide seat 13, the guide seat 13 is connected with a guide post 14 in a sliding manner, the lower end of the guide post 14 is provided with a wheel seat 15, and the wheel seat 15 is movably connected with a roller 16;
the guide seat 13 is in threaded connection with a threaded rod 17, the lower end of the threaded rod 17 is in contact with the wheel seat 15, and the threaded rod 17 is provided with a hand wheel 18.
The slurry distributing mechanism 2 also comprises a charging barrel 19, and the bottom of the charging barrel 19 is provided with a discharge valve 20;
the charging barrel 19 is provided with rabbling mechanism 21, and rabbling mechanism 21 is including being provided with the grudging post 22 at charging barrel 19 top, and the grudging post 22 middle section is provided with first motor 23, and first motor 23 transmission is connected with reduction gear 24, and the transmission of reduction gear 24 lower extreme is connected with first pivot 25, and first pivot 25 lower extreme is connected with radial arm 26, and radial arm 26 is provided with six second motors 27, and the transmission of second motor 27 lower extreme is connected with puddler 28.
The stirring rod 28 is provided with a helical groove.
The middle section of the stand 22 is recessed downward.
The guide rail wheel 5 is connected with a supporting plate 29, and the supporting plate 29 is connected with the charging barrel 19;
the support plate 29 is further provided with a third motor 30, and the third motor 30 is in transmission connection with the guide rail wheel 5.
The floating structure 6 is arranged at the lower side of the supporting plate 29;
the trowelling structure 6 is located the rear of feed cylinder 19, and the trowelling structure 6 includes the link, and the link lower extreme is provided with thick liquids distribution scraper 31, and thick liquids distribution scraper 31 rear is provided with a plurality of trowelling strips 32.
The middle section of the slurry distribution scraper 31 protrudes forwards in a wild goose-shaped manner, and the left section and the right section are both provided with saw-toothed folds;
the troweling strip 32 comprises a scraping strip 33, the middle section of the scraping strip 33 protrudes forwards in a wild goose shape, and the bottom of the scraping strip 33 is connected with a backward horizontal folding edge 34;
the height of the troweling strip 32 is smaller than that of the slurry distribution scraper 31;
the further the trowel strip 32 is from the slurry distribution screed 31, the smaller the height.
The top of the slurry distribution scraper 31 and the troweling strip 32 is connected with a horizontal strip 35, the upper side of the horizontal strip 35 is provided with a fourth upright post 36, and the fourth upright post 36 is connected with the support plate 29.
When the floating structure is used, the movable platform is arranged at a set place, and the four rollers are adjusted so that the floating structure is proper in height. Typically, the slurry placement mechanism is now located at the rear end of the guide rail. And (4) putting the materials into the charging barrel, and starting the first motor and the second motor to start stirring. Since the material may contain stones and cement components, blade-type stirring is less reliable because the stirring rod is a vertical rod provided with a spiral groove. And because the stirring rod is too thin, the stirring rod also rotates around the axis of the charging barrel, so that the stirring efficiency can be improved.
Stirring to be suitable, opening the bleeder valve, starting the third motor, the guide rail wheel moves to guide rail the place ahead, and then the while is discharged the material and is screeded.
The slurry is distributed to the scraping plate in wild goose shape, so that the slurry is favorably diffused to two sides; simultaneously, because thick liquids distribution scraper blade is provided with cockscomb structure fold to prevent that thick liquids from all sliding to both sides and leading to the middle section to lay inadequately.
The floating-up wild goose is in a smooth relative sliding state for floating up, so that the fold crack caused by floating up and pressing is avoided.
The latter screed bars have a smaller height, thereby progressively compacting the slurry.
The technical features of the present invention, which are not described in the present application, can be implemented by or using the prior art, and are not described herein again, of course, the above description is not limited to the above examples, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions that can be made by a person skilled in the art within the spirit of the present invention also belong to the protection scope of the present invention.
Claims (10)
1. A quick concrete pavement repairing device is characterized by comprising a moving platform, wherein the moving platform is provided with a slurry distributing mechanism;
the slurry distributing mechanism is provided with a floating structure.
2. The device for quickly repairing a concrete pavement according to claim 1, wherein a first beam is arranged at two ends of the guide rail to form a first rectangular frame;
a longitudinal beam is arranged above the guide rail, a second cross beam is arranged above the first cross beam, and the longitudinal beam and the second cross beam form a second rectangular frame;
a first upright post is arranged between the first cross beam and the second cross beam, and a second upright post is connected to the outer sides of the guide rail and the longitudinal beam, so that a rectangular frame is formed by the guide rail, the first rectangular frame and the second giant frame.
3. The device for rapidly repairing a concrete pavement according to claim 2, wherein the height adjusting mechanism comprises a third upright column arranged outside the guide rail and the longitudinal beam, the third upright column is provided with a guide seat, the guide seat is connected with a guide column in a sliding manner, the lower end of the guide column is provided with a wheel seat, and the wheel seat is movably connected with a roller;
the guide holder threaded connection has the threaded rod, the threaded rod lower extreme contact the wheel seat, the threaded rod is provided with the hand wheel.
4. The device for quickly repairing a concrete pavement according to claim 1, wherein the slurry distribution mechanism further comprises a charging barrel, and a discharge valve is arranged at the bottom of the charging barrel;
the feed cylinder is provided with rabbling mechanism, rabbling mechanism is including being provided with the grudging post at feed cylinder top, the grudging post middle section is provided with first motor, first motor drive is connected with the reduction gear, reduction gear lower extreme transmission is connected with first pivot, first pivot lower extreme is connected with the spiral arm, the spiral arm is provided with a plurality of second motors, second motor lower extreme transmission is connected with the puddler.
5. A concrete pavement quick-repair device according to claim 4, wherein said stirring rod is provided with a spiral groove.
6. A concrete pavement quick-repair device according to claim 4, wherein said middle section of said upright frame is recessed downward.
7. The device for rapidly repairing concrete pavement according to claim 4, wherein a support plate is connected with the guide rail wheel, and the support plate is connected with the charging barrel;
the supporting plate is further provided with a third motor, and the third motor is in transmission connection with the guide rail wheel.
8. A concrete pavement quick-repair device according to claim 7, wherein said floating structure is arranged on the lower side of said supporting plate;
the troweling structure is located behind the charging barrel and comprises a connecting frame, a slurry distribution scraper is arranged at the lower end of the connecting frame, and a plurality of troweling strips are arranged behind the slurry distribution scraper.
9. The quick concrete pavement restoration device according to claim 8, wherein the middle section of the slurry distribution scraper is protruded forward in a goose-rowed shape, and the left section and the right section are both provided with zigzag wrinkles;
the trowelling strip comprises a scraping strip, the middle section of the scraping strip protrudes forwards to form an goose-shaped shape, and the bottom of the scraping strip is connected with a backward horizontal folding edge;
the troweling strip is lower than the slurry distribution scraper in height;
the further the trowel strip is from the slurry distribution screed, the smaller the height.
10. A concrete pavement quick repairing device according to claim 9, wherein a cross bar is connected with the top of the slurry distribution scraper and the troweling strip, a fourth upright is arranged on the upper side of the cross bar, and the fourth upright is connected with the supporting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210318015.7A CN114635337A (en) | 2022-03-29 | 2022-03-29 | Quick prosthetic devices of concrete road surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210318015.7A CN114635337A (en) | 2022-03-29 | 2022-03-29 | Quick prosthetic devices of concrete road surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114635337A true CN114635337A (en) | 2022-06-17 |
Family
ID=81951569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210318015.7A Pending CN114635337A (en) | 2022-03-29 | 2022-03-29 | Quick prosthetic devices of concrete road surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114635337A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100007219U (en) * | 2010-06-24 | 2010-07-14 | 배영진 | a scoop of concrete mortar |
| CN206897275U (en) * | 2017-05-16 | 2018-01-19 | 贵州大龙建通新材料有限公司 | Planet spreading batch mixer |
| CN210874921U (en) * | 2019-09-10 | 2020-06-30 | 天津滨海新区大港方圆钻采技术服务有限公司 | Vertical double helix conical mixer of production solid lubricant |
| CN112359697A (en) * | 2020-12-05 | 2021-02-12 | 张雯昊 | Concrete conveyer for concrete pavement restoration |
| CN212582380U (en) * | 2020-06-08 | 2021-02-23 | 董雪 | Asphalt pavement patching device is used in highway maintenance |
| CN212670193U (en) * | 2020-04-01 | 2021-03-09 | 张业忠 | Raw material mixing and storing device for asphalt paving |
| CN212802688U (en) * | 2020-07-20 | 2021-03-26 | 四川地丰建设工程有限公司 | Concrete defect treatment repair tool |
| CN214301133U (en) * | 2020-09-08 | 2021-09-28 | 刘铭 | Concrete floating device for road construction |
-
2022
- 2022-03-29 CN CN202210318015.7A patent/CN114635337A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100007219U (en) * | 2010-06-24 | 2010-07-14 | 배영진 | a scoop of concrete mortar |
| CN206897275U (en) * | 2017-05-16 | 2018-01-19 | 贵州大龙建通新材料有限公司 | Planet spreading batch mixer |
| CN210874921U (en) * | 2019-09-10 | 2020-06-30 | 天津滨海新区大港方圆钻采技术服务有限公司 | Vertical double helix conical mixer of production solid lubricant |
| CN212670193U (en) * | 2020-04-01 | 2021-03-09 | 张业忠 | Raw material mixing and storing device for asphalt paving |
| CN212582380U (en) * | 2020-06-08 | 2021-02-23 | 董雪 | Asphalt pavement patching device is used in highway maintenance |
| CN212802688U (en) * | 2020-07-20 | 2021-03-26 | 四川地丰建设工程有限公司 | Concrete defect treatment repair tool |
| CN214301133U (en) * | 2020-09-08 | 2021-09-28 | 刘铭 | Concrete floating device for road construction |
| CN112359697A (en) * | 2020-12-05 | 2021-02-12 | 张雯昊 | Concrete conveyer for concrete pavement restoration |
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