CN112962398A - Road surface leveling equipment for municipal construction and use method thereof - Google Patents
Road surface leveling equipment for municipal construction and use method thereof Download PDFInfo
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- CN112962398A CN112962398A CN202110204719.7A CN202110204719A CN112962398A CN 112962398 A CN112962398 A CN 112962398A CN 202110204719 A CN202110204719 A CN 202110204719A CN 112962398 A CN112962398 A CN 112962398A
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- road surface
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- bevel gears
- threaded rods
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 230000033001 locomotion Effects 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000010408 sweeping Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 230000002337 anti-port Effects 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 claims description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/42—Machines for imparting a smooth finish to freshly-laid paving courses other than by rolling, tamping or vibrating
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/10—Hydraulically loosening or dislodging undesirable matter; Raking or scraping apparatus ; Removing liquids or semi-liquids e.g., absorbing water, sliding-off mud
- E01H1/101—Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
Abstract
The invention relates to the technical field of leveling equipment, and discloses road leveling equipment for municipal construction and a using method thereof, wherein the road leveling equipment for the municipal construction comprises a shell, two threaded rods are rotatably arranged in the shell, the top ends of the two threaded rods extend to the outer side of the shell, four first bevel gears and a horizontal shaft are rotatably arranged at the top of the shell, two first bevel gears positioned on the same side in the four first bevel gears are mutually meshed, the two first bevel gears positioned on the same horizontal axis are fixedly arranged on the outer side of the horizontal shaft, the other two first bevel gears are respectively fixedly connected with the top ends of the two threaded rods, and the outer threads of the two threaded rods are connected with the same lifting plate. The invention has reasonable design, can carry out certain cleaning work on the road surface while carrying out leveling work on the road surface, thereby improving the utilization rate of the motor, reducing the complicated process of cleaning the road surface in the later period of manpower and improving the efficiency of road surface construction.
Description
Technical Field
The invention relates to the technical field of leveling equipment, in particular to road surface leveling equipment for municipal construction and a using method thereof.
Background
In China, municipal infrastructure refers to various buildings, structures, equipment and the like which are arranged in planning and construction ranges of urban areas and towns (villages) and provide paid or unpaid public products and services for residents based on government responsibilities and obligations. Various public infrastructure construction supporting in urban life all belong to municipal works category, for example common urban road, bridge, subway, underground pipeline, tunnel, river course, track traffic, sewage treatment, refuse treatment processing etc. engineering, for example again with the life closely relevant various pipelines: rainwater, sewage, water supply, reclaimed water, electric power (parts except red lines), telecommunication, heating power, gas and the like, and construction of squares, urban greening and the like belong to the municipal engineering category.
However, most of the existing road surface leveling devices lack a function of cleaning the road surface, so that the problem that manual cleaning of the road surface is troublesome and labor-consuming is caused, and therefore a road surface leveling device for municipal construction and a using method thereof are provided for solving the problem.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides road surface leveling equipment for municipal construction and a using method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a road surface leveling device for municipal construction comprises a shell, wherein two threaded rods are rotatably arranged inside the shell, the top ends of the two threaded rods extend to the outer side of the shell, four first bevel gears and a horizontal shaft are rotatably arranged at the top of the shell, two first bevel gears positioned on the same side in the four first bevel gears are meshed with each other, two first bevel gears positioned on the same horizontal axis are fixedly arranged on the outer side of the horizontal shaft, the other two first bevel gears are respectively and fixedly connected with the top ends of the two threaded rods, the outer side of the two threaded rods is in threaded connection with a same lifting plate, a rotating shaft is rotatably arranged inside the lifting plate, a cam is fixedly arranged at the bottom end of the rotating shaft, a movable plate is movably abutted against the outer side of the cam, one end of a movable rod is fixedly arranged on the outer side of the movable plate, a roller wheel is, the other end of the spring is fixedly arranged on the inner wall of the top of the shell, the bottom of the lifting plate is rotatably provided with the top end of the oscillating rod, the bottom of the oscillating rod is fixedly provided with the spray head, the outer side of the roller wheel is arranged on the outer side of the oscillating rod in a rolling manner, the inner part of the lifting plate is rotatably provided with the vertical shaft, the bottom of the vertical shaft is fixedly provided with the cleaning wheel, the top end of the vertical shaft and the top end of the rotating shaft are both fixedly provided with the belt pulleys, the two belt pulleys are in transmission connection with the same belt, the two sides of the bottom of the lifting plate are both fixedly provided with the supporting rods, the inner parts of the two supporting rods are both rotatably provided with the transverse shafts, one end of each of the two transverse shafts close to each other is fixedly, the other end of the connecting shaft and the outer side of one of the two transverse shafts are fixedly provided with chain wheels, and the two chain wheels are in transmission connection with the same chain.
Preferably, a first motor is fixedly mounted at the top of the lifting plate, and an output shaft of the first motor is fixedly connected with the top of one of the two belt pulleys.
Preferably, a second motor is fixedly mounted on one side of the top of the shell, and an output shaft of the second motor is fixedly connected with one end of the horizontal shaft.
Preferably, the top fixed mounting of lifter plate has the suction pump, and the delivery port intercommunication of suction pump has the one end of raceway, and the other end of raceway communicates each other with the outside of shower nozzle, and the water inlet intercommunication of suction pump has the one end of inlet tube, and the outside fixed mounting of casing has the water tank, and the other end of inlet tube communicates each other with the top of water tank.
Preferably, four corners of the bottom of the shell are rotatably provided with universal wheels, and the rear side of the shell is fixedly provided with a push-pull rod.
Preferably, a guide rod is fixedly mounted at the bottom of the lifting plate, and the outer side of the movable rod is movably abutted against the inner side of the guide rod.
Preferably, a supporting table is fixedly mounted at the top of the outer side of the housing, and the second motor is fixedly mounted at the top of the supporting table.
The invention also provides a using method of the road surface leveling equipment for municipal construction, which comprises the following steps:
s1: when the road surface needs to be leveled, the second motor is driven firstly, the second motor works to drive the horizontal shaft to rotate, so that the four first bevel gears are driven to synchronously rotate, the two threaded rods synchronously rotate, the lifting plate is driven to vertically move downwards, the leveling roller and the sweeping wheel are enabled to vertically move downwards in the same way, and when the leveling roller moves to be in contact with the road surface, the second motor stops working;
s2: then, a first motor and a water suction pump are driven, the first motor drives two belt pulleys to synchronously rotate during working, so that a rotating shaft and a vertical shaft synchronously rotate, the rotating shaft drives a cam to synchronously rotate, so that a moving plate obtains reciprocating motion in the horizontal direction, so that a moving rod is driven to obtain the same motion, and finally, a swinging rod obtains reciprocating arc-shaped swinging, so that a nozzle is driven to obtain the same motion track, so that the spraying range of the nozzle can be enlarged, so that the road surface can be cleaned;
s3: when not needing to carry out level and smooth work to the road surface, control second motor reversal this time to make two threaded rods obtain antiport, thereby drive the lifter plate and obtain vertical ascending motion, thereby make leveling roller and cleaning wheel obtain same vertical motion, thereby move the inside of casing, thereby make things convenient for the removal of whole device.
Compared with the prior art, the invention provides the road surface leveling equipment for municipal construction and the use method thereof, and the road surface leveling equipment has the following beneficial effects:
(1) the second motor is driven through the arranged horizontal shaft, the second motor drives the horizontal shaft to rotate when working, so that the four first bevel gears are driven to synchronously rotate, two threaded rods are enabled to synchronously rotate, the lifting plate is driven to work vertically downwards or vertically upwards, the leveling roller is driven to move vertically, when the leveling roller needs to be used, the leveling roller is moved out of the outer side of the shell and does not need to be used, and the leveling roller is moved into the shell, so that the function of retracting and releasing the leveling roller is realized;
(2) through the arranged belt pulleys, the first motor is driven, the two belt pulleys are driven to synchronously rotate by the operation of the first motor, so that the rotating shaft and the vertical shaft synchronously rotate, the rotating shaft drives the cam to synchronously rotate, the moving plate obtains reciprocating motion in the horizontal direction, the moving rod is driven to obtain the same motion, and finally the oscillating rod obtains reciprocating arc-shaped oscillation, so that the spray heads are driven to obtain the same motion track, and the spraying range of the spray heads can be enlarged;
(3) through the sprocket and the second bevel gear that set up to make the rotation of vertical axle drive the horizontal pole and rotate, thereby drive the smooth roller synchronous rotation, thereby make to carry out cleaning work to the road surface when working to the face levelly and smoothly.
The invention has reasonable design, can carry out certain cleaning work on the road surface while carrying out leveling work on the road surface, thereby improving the utilization rate of the motor, reducing the complicated process of cleaning the road surface in the later period of manpower and improving the efficiency of road surface construction.
Drawings
FIG. 1 is a schematic structural view of a road surface leveling device for municipal construction according to the present invention;
FIG. 2 is a front view of a road surface leveling apparatus for municipal construction according to the present invention;
FIG. 3 is a rear view of a road surface grading apparatus for municipal construction according to the present invention;
FIG. 4 is a schematic structural view of part A of a road surface leveling device for municipal construction according to the present invention;
FIG. 5 is a schematic structural view of a portion B of a road surface leveling device for municipal construction according to the present invention.
In the figure: 1. a housing; 2. a threaded rod; 3. a horizontal axis; 4. a first bevel gear; 5. a lifting plate; 6. a rotating shaft; 7. a cam; 8. moving the plate; 9. a travel bar; 10. a roller; 11. a spring; 12. a swing lever; 13. a spray head; 14. a vertical axis; 15. cleaning wheels; 16. a belt pulley; 17. a belt; 18. a connecting shaft; 19. a second bevel gear; 20. a horizontal axis; 21. a leveling roller; 22. a sprocket; 23. a chain; 24. a first motor; 25. a second motor.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-5, a road surface leveling device for municipal construction comprises a shell 1, wherein two threaded rods 2 are rotatably installed inside the shell 1, the top ends of the two threaded rods 2 extend to the outer side of the shell 1, four first bevel gears 4 and a horizontal shaft 3 are rotatably installed on the top of the shell 1, two first bevel gears 4 positioned on the same side in the four first bevel gears 4 are meshed with each other, two first bevel gears 4 positioned on the same horizontal axis are fixedly installed on the outer side of the horizontal shaft 3, the other two first bevel gears 4 are respectively and fixedly connected with the top ends of the two threaded rods 2, the outer sides of the two threaded rods 2 are in threaded connection with a same lifting plate 5, a rotating shaft 6 is rotatably installed inside the lifting plate 5, a cam 7 is fixedly installed at the bottom end of the rotating shaft 6, a movable plate 8 is movably abutted to the outer side of the cam 7, and one end of, the other end of the moving rod 9 is rotatably provided with a roller 10, the outer side of the moving plate 8 is fixedly provided with one end of a spring 11, the other end of the spring 11 is fixedly arranged on the inner wall of the top of the shell 1, the bottom of the lifting plate 5 is rotatably provided with the top end of a swinging rod 12, the bottom end of the swinging rod 12 is fixedly provided with a spray head 13, the outer side of the roller 10 is rotatably arranged on the outer side of the swinging rod 12, the inner part of the lifting plate 5 is rotatably provided with a vertical shaft 14, the bottom end of the vertical shaft 14 is fixedly provided with a sweeping wheel 15, the top end of the vertical shaft 14 and the top end of the rotating shaft 6 are both fixedly provided with belt pulleys 16, the two belt pulleys 16 are in transmission connection with the same belt 17, the two sides of the bottom of the lifting plate 5 are both fixedly provided with supporting rods, the inner parts of the two supporting, one end of the connecting shaft 18 and the outer side of the vertical shaft 14 are both fixedly provided with a second bevel gear 19, the two second bevel gears 19 are mutually meshed, the other end of the connecting shaft 18 and the outer side of one transverse shaft 20 of the two transverse shafts 20 are both fixedly provided with chain wheels 22, and the two chain wheels 22 are in transmission connection with the same chain 23.
In this embodiment, the top of the lifting plate 5 is fixedly provided with a first motor 24, and an output shaft of the first motor 24 is fixedly connected with the top of one pulley 16 of the two pulleys 16.
In this embodiment, a second motor 25 is fixedly installed on one side of the top of the housing 1, and an output shaft of the second motor 25 is fixedly connected with one end of the horizontal shaft 3.
In this embodiment, the top fixed mounting of lifter plate 5 has the suction pump, and the delivery port intercommunication of suction pump has the one end of raceway, and the other end of raceway communicates each other with the outside of shower nozzle 13, and the water inlet intercommunication of suction pump has the one end of inlet tube, and the outside fixed mounting of casing 1 has the water tank, and the other end of inlet tube communicates each other with the top of water tank.
In this embodiment, four corners of the bottom of the housing 1 are rotatably provided with universal wheels, and the rear side of the housing 1 is fixedly provided with a push-pull rod.
In this embodiment, a guide bar is fixedly mounted on the bottom of the lifting plate 5, and the outer side of the moving bar 9 is movably abutted against the inner side of the guide bar.
In this embodiment, a supporting platform is fixedly installed at the top of the outer side of the housing 1, and the second motor 25 is fixedly installed at the top of the supporting platform.
The embodiment also provides a using method of the road surface leveling equipment for municipal construction, which comprises the following steps:
s1: when the road surface needs to be leveled, the second motor 25 is driven firstly, the second motor 25 works to drive the horizontal shaft 3 to rotate, so that the four first bevel gears 4 are driven to synchronously rotate, the two threaded rods 2 synchronously rotate, the lifting plate 5 is driven to vertically move downwards, the leveling roller 21 and the sweeping wheel 15 obtain the same vertical movement downwards, and when the leveling roller 21 moves to be in contact with the road surface, the second motor 25 stops working;
s2: then, a first motor 24 and a water suction pump are driven, the first motor 24 drives two belt pulleys 16 to synchronously rotate when working, so that a rotating shaft 6 and a vertical shaft 14 synchronously rotate, the rotating shaft 6 drives a cam 7 to synchronously rotate, so that a moving plate 8 obtains reciprocating motion in the horizontal direction, so that a moving rod 9 is driven to obtain the same motion, and finally a swinging rod 12 obtains reciprocating arc-shaped swinging, so that a nozzle 13 is driven to obtain the same motion track, so that the spraying range of the nozzle 13 can be enlarged, so that the road surface can be cleaned, and then the vertical shaft 14 rotates to drive a cleaning wheel 15 to synchronously rotate, so that the road surface is cleaned, the tedious process of manual operation is reduced, and the leveling roller 21 can synchronously clean the road surface when leveling the road surface;
s3: when the road surface is not required to be leveled, the second motor 25 is controlled to rotate reversely, so that the two threaded rods 2 rotate reversely, the lifting plate 5 is driven to move vertically upwards, the leveling roller 21 and the sweeping wheel 15 move vertically to the inside of the shell 1, and the whole device is convenient to move.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
Claims (8)
1. The utility model provides a road surface leveling equipment for municipal construction, which comprises a shell (1), two threaded rods (2) are installed in the internal rotation of shell (1), the top of two threaded rods (2) all extends to the outside of shell (1), the top of shell (1) is rotated and is installed four first bevel gears (4) and a horizontal axis (3), two first bevel gears (4) that lie in the same side in four first bevel gears (4) are intermeshing, two first bevel gears (4) that lie in the same horizontal axis are all fixed mounting in the outside of horizontal axis (3), other two first bevel gears (4) are respectively with the top fixed connection of two threaded rods (2), the outside threaded connection of two threaded rods (2) has same lifter plate (5), the internal rotation of lifter plate (5) installs pivot (6), the bottom fixed mounting of pivot (6) has cam (7), a movable plate (8) is movably abutted to the outer side of the cam (7), one end of a movable rod (9) is fixedly mounted on the outer side of the movable plate (8), a roller (10) is rotatably mounted at the other end of the movable rod (9), one end of a spring (11) is fixedly mounted on the outer side of the movable plate (8), the other end of the spring (11) is fixedly mounted on the inner wall of the top of the shell (1), the bottom of the lifting plate (5) is rotatably mounted at the top end of a swinging rod (12), a spray head (13) is fixedly mounted at the bottom end of the swinging rod (12), a belt pulley (16) is rotatably mounted on the outer side of the swinging rod (12) on the outer side of the roller (10), a vertical shaft (14) is rotatably mounted inside the lifting plate (5), a cleaning wheel (15) is fixedly mounted at the bottom end of the vertical shaft (14), belt pulleys (16) are fixedly mounted at the top end of the, the equal fixed mounting in bottom both sides of lifter plate (5) has the bracing piece, the inside of two bracing pieces is all rotated and is installed cross axle (20), the one end fixed mounting that two cross axles (20) are close to each other has same flat roller (21), connecting axle (18) are installed to the inside rotation of one bracing piece in two bracing pieces, the one end of connecting axle (18) and the equal fixed mounting in the outside of vertical axle (14) have second bevel gear (19), two second bevel gear (19) intermeshing, the equal fixed mounting in the outside of the other end of connecting axle (18) and one cross axle (20) in two cross axles (20) has sprocket (22), the transmission connection has same chain (23) on two sprocket (22).
2. The road surface leveling device for municipal construction according to claim 1, wherein a first motor (24) is fixedly mounted on the top of the lifting plate (5), and an output shaft of the first motor (24) is fixedly connected to the top of one (16) of the two pulleys (16).
3. The road surface leveling device for municipal construction according to claim 1, wherein a second motor (25) is fixedly mounted on one side of the top of the housing (1), and an output shaft of the second motor (25) is fixedly connected with one end of the horizontal shaft (3).
4. The road surface leveling device for municipal construction according to claim 1, wherein a water suction pump is fixedly mounted at the top of the lifting plate (5), a water outlet of the water suction pump is communicated with one end of a water pipe, the other end of the water pipe is communicated with the outer side of the spray head (13), a water inlet of the water suction pump is communicated with one end of a water inlet pipe, a water tank is fixedly mounted at the outer side of the casing (1), and the other end of the water inlet pipe is communicated with the top of the water tank.
5. The road surface leveling device for municipal construction according to claim 1, wherein four corners of the bottom of the housing (1) are rotatably provided with universal wheels, and the rear side of the housing (1) is fixedly provided with a push-pull rod.
6. The apparatus as claimed in claim 1, wherein the guide bar is fixed to the bottom of the lifting plate (5), and the outside of the movable bar (9) is movably abutted against the inside of the guide bar.
7. The apparatus as claimed in claim 1, wherein the support table is fixedly installed on the top of the outer side of the housing (1), and the second motor (25) is fixedly installed on the top of the support table.
8. The use method of the road surface leveling equipment for municipal construction is characterized by comprising the following steps of:
s1: when the road surface needs to be leveled, the second motor (25) is driven firstly, the second motor (25) works to drive the horizontal shaft (3) to rotate, so that the four first bevel gears (4) are driven to synchronously rotate, the two threaded rods (2) are enabled to synchronously rotate, the lifting plate (5) is driven to vertically move downwards, the leveling roller (21) and the sweeping wheel (15) can vertically move downwards in the same manner, and when the leveling roller (21) moves to be in contact with the road surface, the second motor (25) stops working;
s2: then the first motor (24) and the water pump are driven, the first motor (24) drives the two belt pulleys (16) to synchronously rotate, thereby leading the rotating shaft (6) and the vertical shaft (14) to synchronously rotate, leading the rotation of the rotating shaft (6) to drive the cam (7) to synchronously rotate, thereby leading the moving plate (8) to obtain reciprocating motion in the horizontal direction, driving the moving rod (9) to obtain the same motion, and finally leading the swinging rod (12) to obtain reciprocating arc swinging, thereby driving the spray head (13) to obtain the same motion track, and further enlarging the spraying range of the spray head (13) so as to clean the road surface, secondly, the rotation of the vertical shaft (14) drives the cleaning wheel (15) to rotate synchronously, thereby cleaning the road surface, reducing the complicated process of manual operation, therefore, the leveling roller (21) can synchronously clean the road surface when the road surface is leveled;
s3: when not needing to carry out level and smooth work to the road surface, control second motor (25) reversal this time to make two threaded rods (2) obtain antiport, thereby drive lifter plate (5) and obtain vertical ascending motion, thereby make leveling roller (21) and cleaning wheel (15) obtain same vertical motion, thereby move the inside of casing (1), thereby make things convenient for the removal of whole device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110204719.7A CN112962398A (en) | 2021-02-24 | 2021-02-24 | Road surface leveling equipment for municipal construction and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110204719.7A CN112962398A (en) | 2021-02-24 | 2021-02-24 | Road surface leveling equipment for municipal construction and use method thereof |
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| CN112962398A true CN112962398A (en) | 2021-06-15 |
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| CN202110204719.7A Pending CN112962398A (en) | 2021-02-24 | 2021-02-24 | Road surface leveling equipment for municipal construction and use method thereof |
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| CN113463469A (en) * | 2021-08-13 | 2021-10-01 | 李维维 | Micro-surfacing paver and construction method |
| CN114481756A (en) * | 2022-02-22 | 2022-05-13 | 刘海霞 | Cement concrete pavement grooving device for highway engineering |
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Application publication date: 20210615 |