CN220104770U - Wet wheel abrasion sample preparation scraping plate - Google Patents
Wet wheel abrasion sample preparation scraping plate Download PDFInfo
- Publication number
- CN220104770U CN220104770U CN202321049840.8U CN202321049840U CN220104770U CN 220104770 U CN220104770 U CN 220104770U CN 202321049840 U CN202321049840 U CN 202321049840U CN 220104770 U CN220104770 U CN 220104770U
- Authority
- CN
- China
- Prior art keywords
- central shaft
- horizontal
- connecting rods
- inclined connecting
- wet wheel
- 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.)
- Active
Links
- 238000005299 abrasion Methods 0.000 title claims abstract description 31
- 238000007790 scraping Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims description 18
- 229920001971 elastomer Polymers 0.000 claims abstract description 35
- 239000010426 asphalt Substances 0.000 description 20
- 239000000203 mixture Substances 0.000 description 16
- 239000002002 slurry Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Cleaning In General (AREA)
Abstract
The utility model discloses a scraper for preparing a wet wheel abrasion sample, which comprises a central shaft which is longitudinally arranged, wherein the upper part of the central shaft is connected with a pair of inclined connecting rods which are respectively positioned at the left side and the right side of the central shaft, the upper ends of the two inclined connecting rods are connected to the central shaft in a staggered manner along the height direction, and the horizontal distances between the lower ends of the two inclined connecting rods and the central shaft are equal; the lower ends of the two inclined connecting rods are respectively connected with a horizontal shaft, the two horizontal shafts are positioned on the same axis, the close ends of the two horizontal shafts are propped against the outer wall of the central shaft, and the far ends of the two horizontal shafts are provided with limiting end plates; rectangular connecting frames positioned on the inner sides of the limiting end plates are hinged on the two horizontal shafts respectively, and a pair of rubber scraping plates which are longitudinally arranged are connected on two long edges of the bottom surface of each rectangular connecting frame. The utility model has the advantages that the rubber scraping plates connected on the two horizontal shafts have different vertical acting force components and horizontal acting force components during the rotation movement, thereby ensuring that the surface of the sample can be scraped more smoothly and compactly, and being convenient for operators to prepare more standard wet wheel abrasion samples.
Description
Technical Field
The utility model relates to the technical field of wet wheel abrasion tests, in particular to a scraper prepared by a wet wheel abrasion sample aiming at a rubber asphalt mixture.
Background
Asphalt pavement is a part of the important road system in China and is widely applied to the construction of roads of different levels. With the development of economy, the traffic volume of the highway is continuously increased, and particularly, the number of heavy-duty vehicles is obviously increased, so that the traffic load is increased increasingly; in addition, the road asphalt pavement in China generally enters the repairing and maintaining period after the environmental erosion of years and months.
The maintenance of the micro surface of the pavement adopts a slurry seal construction process, namely: and (3) performing cold paving operation on the pavement by using the emulsified asphalt slurry mixture. The slurry seal construction process has the advantages of convenient construction, energy conservation and emission reduction, small pollution to constructors and environment, rapid traffic opening and the like, and is the first choice for shallow repair and preventive maintenance of asphalt pavement. However, when the emulsified asphalt as a cementing material is used alone, the emulsified asphalt has the defects of poor flexibility and weak deformation resistance, so that rubber powder with fine particle size is required to be added into the emulsified asphalt, thereby obviously enhancing the high-temperature stability, rebound resilience and deformation resistance of the emulsified asphalt and improving the road performance of the emulsified asphalt.
The wet wheel abrasion test is a test for determining the abrasion resistance of the emulsified asphalt slurry seal layer mixture after molding, and is an important test for determining the optimal oil-stone ratio of the emulsified asphalt slurry mixture; however, in the existing actual sample preparation process, experimenters often have the problems of uneven sample surface, uneven aggregate distribution, overlarge sample difference in the same proportion and the like caused by unskilled operation methods. Therefore, in order to reduce experimental errors caused by human factors, the prepared samples tend to be standard, so that the wet wheel abrasion experimental data represent the performance difference of the mixture as much as possible, and the design of an auxiliary forming device capable of helping experimenters prepare standard wet wheel abrasion samples is particularly important.
Disclosure of Invention
The utility model aims to provide a scraper for preparing a wet wheel abrasion sample of a rubber asphalt mixture.
In order to achieve the above purpose, the present utility model may adopt the following technical scheme:
the utility model relates to a scraper for preparing a wet wheel abrasion sample, which comprises a central shaft which is longitudinally arranged, wherein the upper part of the central shaft is connected with a pair of inclined connecting rods which are respectively positioned at the left side and the right side of the central shaft, the upper ends of the two inclined connecting rods are connected to the central shaft in a staggered manner along the height direction, and the horizontal distance between the lower ends of the inclined connecting rods and the central shaft is equal; the lower ends of the two inclined connecting rods are respectively connected with a horizontal shaft, the two horizontal shafts are positioned on the same axis, the close ends of the two horizontal shafts are propped against the outer wall of the central shaft, and the far ends of the two horizontal shafts are provided with limiting end plates; the two horizontal shafts are respectively hinged with rectangular connecting frames positioned on the inner sides of the limiting end plates, and a pair of rubber scraping plates which are longitudinally arranged are connected to two long edges of the bottom surface of each rectangular connecting frame.
Furthermore, the upper ends of the two inclined connecting rods are fixedly connected to the central shaft in an inserting manner, and the lower ends of the two inclined connecting rods are fixedly connected with the middle parts of the upper surfaces of the two horizontal shafts in an inserting manner, so that the detachable connection of the central shaft, the inclined connecting rods and the horizontal shafts is realized.
Further, the upper edge of each rubber scraper is fixedly connected with a longitudinal extension plate in an inserting mode, the rubber scraper is fixedly connected to the long side of the bottom surface of the rectangular connecting frame in an inserting mode through the longitudinal extension plates, and a rubber end block flush with the lower edge of the rubber scraper is arranged at the lower end of the central shaft.
Further, rectangular connecting frame is formed by surrounding front vertical plate, back vertical plate, left vertical plate, right vertical plate and last roof the opening that the oblique connecting rod passed is seted up at rectangular connecting frame's last roof middle part, is located rectangular connecting frame's left vertical plate and right vertical plate lower edge go up the symmetry set up the cartridge in horizontal epaxial inverted U-shaped draw-in groove, be provided with the card in the inverted U-shaped draw-in groove and hold in the palm the spacing arch of horizontal axis realizes rectangular connecting frame and horizontal axis's detachable connection when guaranteeing rectangular connecting frame and horizontal axis hinge to can effectively avoid wet round wearing and tearing sample preparation in-process rectangular connecting frame and horizontal axis separation.
Furthermore, the upper end of the central shaft is fixedly connected with a horizontal handle in an inserted mode, the central shaft can be rotated through the horizontal handle, further, a larger working distance is provided when the surface of the wet wheel abrasion sample is scraped, an operator can generate a larger moment with smaller force, and the rotating speed is accurately controlled.
The utility model has the advantages that the disassembly and assembly of the whole wet wheel abrasion sample preparation scraping plate are easily realized, the wet wheel abrasion sample preparation is convenient for operators, the carrying and the storage are convenient, and the space occupation during the storage is reduced; in addition, the self gravity of the whole wet wheel abrasion sample preparation scraper blade is matched with the turning force to scrape the sample, and meanwhile, the height difference of the upper ends of the two inclined connecting rods connected to the central shaft is utilized to enable the rubber scraper blade connected to the two horizontal shafts to have different vertical acting force components and horizontal acting force components during the rotation movement, so that the surface of the sample can be scraped more smoothly and compactly, and an operator can conveniently prepare a more standard wet wheel abrasion sample.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a top view of fig. 1 (hidden diagonal links and horizontal handles).
Fig. 3 is an enlarged view of the horizontal axis in fig. 1.
Fig. 4 is a left side view of fig. 3.
Fig. 5 is an enlarged left-hand view of the rectangular connector of fig. 1.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1 and 2, the wet wheel abrasion sample preparation scraper comprises a central shaft 1 which is longitudinally arranged, wherein the central shaft 1 is a cylindrical shaft, a pair of inclined connecting rods 2 which are obliquely arranged outwards from top to bottom are connected to the upper part of the central shaft 1, and the two inclined connecting rods 2 are respectively positioned at the left side and the right side of the central shaft 1 to form a left inclined connecting rod 2.1 and a right inclined connecting rod 2.2; the upper ends of the left inclined connecting rod 2.1 and the right inclined connecting rod 2.2 are connected to the central shaft 1 in a staggered manner along the height direction (namely, the connection position of the upper end of the left inclined connecting rod 2.1 and the central shaft 1 is higher than that of the upper end of the right inclined connecting rod 2.2 and the central shaft 1), meanwhile, the horizontal distance between the lower end of the left inclined connecting rod 2.1 and the central shaft 1 is consistent with the horizontal distance between the lower end of the right inclined connecting rod 2.2 and the central shaft 1, so that the length of the left inclined connecting rod 2.1 is slightly longer than that of the right inclined connecting rod 2.2, when the central shaft 1 rotates along the axis of the central shaft 1, the lower end of the left inclined connecting rod 2.1 with a longer length generates a larger vertical force component and a smaller horizontal force component, and the lower end of the right inclined connecting rod 2.2 with a shorter length generates a larger horizontal force component and a smaller vertical force component.
The lower ends of the two inclined connecting rods 2 are respectively connected with a horizontal shaft 3, the two horizontal shafts 3 are positioned on the same axis, the close ends of the two horizontal shafts 3 are propped against the outer wall of the central shaft 1, and the far ends of the two horizontal shafts are provided with limiting end plates 4 (shown in figures 3 and 4). The two horizontal shafts 3 are respectively hinged with a rectangular connecting frame 5 positioned at the inner side of the limiting end plate 4, and the inclined connecting rod 2 is connected to the horizontal shaft 3 by penetrating through the top surface of the rectangular connecting frame 5; a pair of longitudinally arranged rubber scrapers 6 are connected to two long edges of the bottom surface of each rectangular connecting frame 5, the rubber scrapers 6 are made of neoprene rubber with the hardness of HRC 60-HRC 70, and the thickness of each rubber scraper 6 is gradually thinned from top to bottom (as shown in fig. 5).
Specifically, the upper ends of the two inclined connecting rods 2 are fixedly connected to the central shaft 1 in an inserting mode, the lower ends of the two inclined connecting rods are fixedly connected with the middle parts of the upper surfaces of the two horizontal shafts 3 in an inserting mode, specifically, a pair of upper inserting holes 7 are formed in the upper part of the outer wall of the central shaft 1 in a staggered mode along the height direction, the upper ends of the two inclined connecting rods 2 are inserted into the two upper inserting holes 7 in a one-to-one mode, a lower inserting hole 8 is formed in the middle parts of the upper surfaces of the two horizontal shafts 3 respectively, and the lower ends of the two inclined connecting rods 2 are inserted into the two lower inserting holes 8 in a one-to-one mode in a one mode, so that detachable connection of the central shaft 1, the inclined connecting rods 2 and the horizontal shafts 3 is achieved. Meanwhile, the two upper jacks 7 which are arranged in a staggered manner can ensure that two jacks cannot exist at the same height position on the central shaft 1, so that the overall rigidity of the central shaft 1 is ensured, and the central shaft 1 is prevented from being broken or deformed due to tangential acting force when rotating.
The rectangular connecting frame 5 is formed by surrounding a front vertical plate, a rear vertical plate, a left vertical plate, a right vertical plate and an upper top plate, and at the moment, two rubber scraping plates 6 which are arranged in pairs are respectively connected to the lower edge of the front vertical plate and the lower edge of the rear vertical plate of the rectangular connecting frame 5; in addition, in order to enable the inclined connecting rod 2 to easily penetrate through the rectangular connecting frame 5 and be fixedly connected with the horizontal shaft 3 in an inserting way, an opening 9 right above the lower jack 8 is formed in the middle of the upper top plate of the rectangular connecting frame 5; in order to enable the rectangular connecting frame 5 to be hinged to the horizontal shaft 3 in a clamping manner, inverted U-shaped clamping grooves 10 capable of being matched with the horizontal shaft 3 are symmetrically formed in the lower edges of the left vertical plate and the right vertical plate of the rectangular connecting frame 5, and of course, limiting protrusions 11 capable of clamping and supporting the horizontal shaft 3 are arranged in the inverted U-shaped clamping grooves 10 to prevent the horizontal shaft 3 from sliding out of the inverted U-shaped clamping grooves 10, so that the rectangular connecting frame 5 is hinged to the horizontal shaft 3, meanwhile, detachable connection of the rectangular connecting frame 5 and the horizontal shaft 3 is achieved, and the rectangular connecting frame 5 and the horizontal shaft 3 are effectively prevented from being separated in the wet wheel abrasion sample preparation process.
Further, the upper edge of each rubber scraper 6 is fixedly connected with a longitudinal extension plate 12 in an inserting way, the length of the longitudinal extension plate 12 is equal to that of the rubber scraper 6, and the length of the longitudinal extension plate is consistent with that of a front vertical plate or a rear vertical plate of the rectangular connecting frame 5; in addition, the rubber scraping plate 6 is fixedly connected to the lower edge of the front vertical plate or the rear vertical plate of the rectangular connecting frame 5 in a plugging manner through the longitudinal extending plate 12, so that the detachable connection of the rubber scraping plate 6, the longitudinal extending plate 12 and the rectangular connecting frame 5 is realized, and the rubber scraping plate 6 is convenient to detach for maintenance or replacement; at this time, a rubber end block 13 made of the same material as the rubber scraper 6 is further disposed at the lower end of the central shaft 1, so as to ensure that the lower end surface of the rubber end block 13 is flush with the lower edge of the rubber scraper 6.
In addition, a horizontal handle 14 can be fixedly connected to the upper end of the central shaft 1 in an inserting manner, and particularly, a groove is formed in the upper end of the central shaft 1 from top to bottom, the horizontal handle 14 is inserted into the groove, the central shaft 1 is rotated through the horizontal handle 14, further, a larger working distance is provided when the surface of a wet wheel abrasion sample is scraped, an operator can generate a larger moment with smaller force, and the rotating speed is accurately controlled.
During assembly, the upper ends of the two inclined connecting rods 2 are correspondingly inserted into the two upper insertion holes 7 at the upper part of the outer wall of the central shaft 1, then the rectangular connecting frame 5 is sleeved on the lower end of the inclined connecting rod 2 from bottom to top, namely the lower end of the inclined connecting rod 2 passes through an opening 9 in the middle of an upper top plate of the rectangular connecting frame 5, then the horizontal shaft 3 is horizontally inserted on the lower end of the inclined connecting rod 2, the rectangular connecting frame 5 is clamped on the horizontal shaft 3, finally the longitudinal extension plate 12, the rubber scraping plate 6 and the horizontal handle 14 can be assembled, the assembly of the whole wet wheel abrasion sample preparation scraping plate is easily completed, and an operator can conveniently prepare the wet wheel abrasion sample. Of course, the assembled wet wheel abrasion sample preparation scraping plate is also convenient to detach, convenient to carry and store, and space occupation during storage is reduced.
When the device is used, firstly, the assembled whole wet wheel abrasion sample preparation scraping plate is placed on the surface of the asphalt mixture after paving, and small vertical downward acting force is applied on the central shaft 1, so that the central shaft 1 is kept vertical to an experiment table top for bearing the asphalt mixture; then, the center of the asphalt mixture sample is aligned according to the central shaft 1, and the two groups of rubber scrapers 6 are ensured not to exceed the outer edge of the asphalt mixture sample; then the horizontal handle 14 can be held to apply tangential force to rotate the central shaft 1, and vertical downward pressure is not applied to the central shaft 1 during rotation, so that the self weight of the whole wet wheel abrasion sample preparation scraping plate is utilized to scrape the surface of the asphalt mixture; in the process of rotating the two groups of rubber scrapers 6, when the rubber scrapers 6 connected to the right inclined connecting rod 2.2 scrape an asphalt mixture sample, the surface layer of the sample is not extruded to bring more surplus mixture, but tends to bring the surplus mixture to a part lacking the material, so that the surface of the sample is leveled; when the asphalt mixture sample is scraped by the rubber scraper 6 connected to the left inclined connecting rod 2.1, a larger extrusion effect is generated on the sample surface layer, so that the sample surface is more compact, and an operator can conveniently prepare a more standard wet wheel abrasion sample. In addition, when an operator actually operates, the number of times of rotation of the rubber scraper 6 driven by the central shaft 1 is not fixed, and the operator can repeatedly operate the slurry mixture within the period of time for maintaining fluidity according to the leveling condition of the sample, but the operation time cannot exceed the operation time required by the wet wheel abrasion experiment standard.
Claims (5)
1. The utility model provides a wet wheel wearing and tearing sample preparation scraper blade which characterized in that: the device comprises a central shaft which is longitudinally arranged, wherein the upper part of the central shaft is connected with a pair of inclined connecting rods which are respectively positioned at the left side and the right side of the central shaft, the upper ends of the two inclined connecting rods are connected to the central shaft in a staggered manner along the height direction, and the horizontal distances between the lower ends of the two inclined connecting rods and the central shaft are equal; the lower ends of the two inclined connecting rods are respectively connected with a horizontal shaft, the two horizontal shafts are positioned on the same axis, the close ends of the two horizontal shafts are propped against the outer wall of the central shaft, and the far ends of the two horizontal shafts are provided with limiting end plates; the two horizontal shafts are respectively hinged with rectangular connecting frames positioned on the inner sides of the limiting end plates, and a pair of rubber scraping plates which are longitudinally arranged are connected to two long edges of the bottom surface of each rectangular connecting frame.
2. The wet wheel abrasion sample preparation blade according to claim 1, wherein: the upper ends of the two inclined connecting rods are fixedly connected to the central shaft in an inserting mode, and the lower ends of the inclined connecting rods are fixedly connected with the middle parts of the upper surfaces of the two horizontal shafts in an inserting mode.
3. The wet wheel abrasion sample preparation blade according to claim 1, wherein: the upper edge of each rubber scraper is fixedly connected with a longitudinal extension plate in an inserted manner, the rubber scraper is fixedly connected to the long side of the bottom surface of the rectangular connecting frame in an inserted manner through the longitudinal extension plates, and the lower end of the central shaft is provided with a rubber end block flush with the lower edge of the rubber scraper.
4. The wet wheel abrasion sample preparation blade according to claim 1, wherein: rectangular connecting frame is formed by surrounding front vertical plate, rear vertical plate, left vertical plate, right vertical plate and upper top plate the opening that the oblique connecting rod passed is seted up at rectangular connecting frame's upper top plate middle part, is located rectangular connecting frame's left vertical plate and right vertical plate lower edge go up the symmetry set up the cartridge in the epaxial inverted U-shaped draw-in groove of horizontal, be provided with the card in the inverted U-shaped draw-in groove and hold in the palm the spacing arch of horizontal axis.
5. The wet wheel abrasion sample preparation blade according to claim 1, wherein: the upper end of the central shaft is fixedly connected with a horizontal handle in an inserting way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321049840.8U CN220104770U (en) | 2023-05-05 | 2023-05-05 | Wet wheel abrasion sample preparation scraping plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321049840.8U CN220104770U (en) | 2023-05-05 | 2023-05-05 | Wet wheel abrasion sample preparation scraping plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220104770U true CN220104770U (en) | 2023-11-28 |
Family
ID=88846557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321049840.8U Active CN220104770U (en) | 2023-05-05 | 2023-05-05 | Wet wheel abrasion sample preparation scraping plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220104770U (en) |
-
2023
- 2023-05-05 CN CN202321049840.8U patent/CN220104770U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN220104770U (en) | Wet wheel abrasion sample preparation scraping plate | |
| CN210561638U (en) | Bituminous paving paves compaction all-in-one | |
| CN102979121B (en) | Four-wheel copy foldable land leveler | |
| CN206030231U (en) | Make things convenient for concrete mixer of ejection of compact | |
| CN111749104B (en) | Asphalt pavement crack filling device | |
| CN211772645U (en) | Pitch casting machine is used in municipal works construction | |
| CN112012192A (en) | Road bed compaction device for highway engineering | |
| CN204594836U (en) | A kind of porous cement concrete construction workability evaluating apparatus | |
| CN209148502U (en) | A kind of drainage asphalt pavement infiltration test device | |
| CN216515031U (en) | High-efficient filling device of road crack for construction engineering | |
| CN113201997B (en) | Road surface leveling device for highway engineering | |
| CN207606978U (en) | A kind of road pit-hole is filled up with bi-component concrete process equipment | |
| CN114250674A (en) | Leveling device is used in road and bridge construction | |
| CN211815368U (en) | Pitch agitating unit for town road | |
| CN209945314U (en) | Portable pavement structure degree of depth survey device | |
| CN112627153A (en) | Fracture repair visual measurement device and use method | |
| CN209798498U (en) | Novel compaction is backfilled to structure thief hole asphalt concrete device | |
| CN211498410U (en) | Tool vehicle for bridge tunnel maintenance | |
| CN221589161U (en) | Pavement hardening pouring device | |
| CN219342767U (en) | Equipment for construction of curb backrest | |
| CN211571284U (en) | A portable level and smooth device of road bed for municipal highway construction | |
| CN219671008U (en) | Traffic engineering highway construction extrusion device | |
| CN211596532U (en) | Road width limiting device for traffic construction | |
| CN221398579U (en) | Asphalt pavement paving device | |
| CN216621825U (en) | Road surface compactness detection device for highway engineering supervision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |