CN114855567A - Novel elevation control that paves of basic unit device - Google Patents
Novel elevation control that paves of basic unit device Download PDFInfo
- Publication number
- CN114855567A CN114855567A CN202210365208.8A CN202210365208A CN114855567A CN 114855567 A CN114855567 A CN 114855567A CN 202210365208 A CN202210365208 A CN 202210365208A CN 114855567 A CN114855567 A CN 114855567A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 54
- 239000010959 steel Substances 0.000 claims abstract description 54
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 11
- 244000309464 bull Species 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 10
- 239000002689 soil Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration 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
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
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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
- E01C19/12—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 distributing granular or liquid materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a novel base layer paving elevation control device which comprises a steel chisel, wherein an adjusting assembly is arranged on the outer surface of the steel chisel, and a stabilizing assembly is arranged at the bottom end of the steel chisel; the adjusting assembly comprises a sleeve which is in sliding connection with the outer surface of the steel chisel, a first nut is fixedly connected to the outer surface of the sleeve, a first bolt is connected to the inner side of the first nut in a threaded mode, a horizontal rod is fixedly connected to one end, far away from the first nut, of the outer surface of the sleeve, a second nut is fixedly connected to one end, far away from the sleeve, of the horizontal rod, a second bolt is connected to the inner side of the second nut in a threaded mode, and the top end of the second bolt is rotatably connected with a top plate. This novel elevation control that paves of basic unit device is through being equipped with adjusting part at the drill rod surface, and adjusting part can carry out thick flat and accurate flat, improves and adjusts the precision, and the in-process that paves at the paver also can adjust simultaneously, easy operation, and the precision is high, convenient to use.
Description
Technical Field
The invention relates to the technical field of highway construction, in particular to a novel base layer paving elevation control device.
Background
The road construction refers to the general term of the works of road network planning, road reconnaissance design, road construction, maintenance, management and the like, and the road construction scale of a country is determined according to the role of road transportation in a comprehensive transportation system and the importance of the aspects of politics, economy, culture, tourism and the like and by combining with the geographical environment conditions.
The road base course and the road surface course mainly bear the action of the vertical force of the transmitted wheels and diffuse the vertical force into the cushion course and the soil base, the top surface elevation reflects the index of the flatness, which influences the driving comfort (reflecting to the road surface course) and the consumption of the surface course material, when the base course is paved, an elevation control device is needed, the existing height control device and the working principle thereof refer to the figures 6-7, the elevation control device is composed of steel rods, horizontal rods and anti-drop nuts, when the base course is paved, the elevation control device is inserted at two sides of the road, the steel wires are tightly positioned on the horizontal rods, the height of the steel wires is controlled by adjusting the length of the elevation control device inserted into the soil, meanwhile, the leveling instrument of the paver is positioned on the steel wires, when the paver is moved, the leveling instrument of the paver moves on the steel wires and performs the leveling operation, in the technical proposal, the elevation control device is simple in structure and inconvenient to adjust, steel rods are pulled out and inserted for multiple times, looseness easily occurs, steel wires fall off, after elevation measurement is completed, the accuracy is difficult to guarantee during fixing, errors about 2-3mm easily occur, meanwhile, adjustment in the paving process is difficult, paving efficiency is affected, and use is inconvenient.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel base layer paving elevation control device which has the advantages of convenience in use and the like and solves the problem that the traditional base layer paving elevation control device is inconvenient to use.
In order to achieve the purpose, the invention provides the following technical scheme: a novel base layer paving elevation control device comprises a steel chisel, wherein an adjusting assembly is arranged on the outer surface of the steel chisel, and a stabilizing assembly is arranged at the bottom end of the steel chisel;
the adjusting assembly comprises a sleeve which is in sliding connection with the outer surface of the steel chisel, a first nut is fixedly connected to the outer surface of the sleeve, a first bolt is connected to the inner side of the first nut in a threaded mode, a horizontal rod is fixedly connected to one end, far away from the first nut, of the outer surface of the sleeve, a second nut is fixedly connected to one end, far away from the sleeve, of the horizontal rod, a second bolt is connected to the inner side of the second nut in a threaded mode, and the top end of the second bolt is rotatably connected with a top plate.
Furthermore, the drill rod is a smooth steel bar with the diameter of 22mm, the length of the drill rod is 1m, the sleeve is a steel pipe with the wall thickness of 2mm, the inner diameter of the steel pipe is more than 25mm, and the length of the steel pipe is 5 cm.
Further, the second bolt is an M8 fine pitch bolt, and the first bolt is an M10 coarse pitch bolt.
Further, a through hole is formed in the outer surface of the sleeve and corresponds to the first nut, and the first bolt penetrates through the through hole and extends to the inside of the sleeve.
Further, the inner bottom of the top plate is fixedly connected with a bearing seat, and the top end of the second bolt is fixedly connected with the inner side of the bearing seat.
Further, a steel wire groove is formed in the upper surface of the top plate, and the diameter of the steel wire groove is 2 mm.
Further, stabilize the subassembly include with drill rod bottom fixed connection's inserted bar, the cavity has been seted up to the inside of inserted bar, two montants of diapire fixedly connected with of cavity, two rotate on the montant and be connected with a plurality of screw rods, the outer fixed surface of screw rod is connected with driven awl tooth, the meshing has initiative awl tooth on the driven awl tooth, the bottom of cavity is rotated and is connected with the bull stick, the equal threaded connection in both ends has the thread bush, two about the screw rod surface the equal threaded connection in one end that the thread bush surface was carried on the back mutually has the plug, be equipped with actuating mechanism between bull stick and the inserted bar.
Furthermore, the driving mechanism comprises a worm rotatably connected with the outer surface of the inserted rod, a hand wheel is fixedly connected with the right end of the worm, the driving mechanism further comprises a worm wheel fixedly connected with the top of the outer surface of the rotating rod, and the worm is meshed with the worm wheel.
Further, the initiative awl tooth is fixed in the surface of bull stick, both ends all communicate to have a plurality of square holes of seting up on the inserted bar about the cavity, the thread bush is squarely, and thread bush and square hole sliding connection.
Furthermore, the thread directions of the left end and the right end of the outer surface of the screw rod are opposite, and the plug and one end of the inserted bar, which is far away from the steel rod, are both conical.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
1. this novel elevation control that paves of basic unit device is through being equipped with adjusting part at the drill rod surface, and adjusting part can carry out thick flat and accurate flat, improves and adjusts the precision, and the in-process that paves at the paver also can adjust simultaneously, easy operation, and the precision is high, convenient to use.
2. This novel elevation control that paves of basic unit device is through being equipped with at the drill rod lower extreme and stablizing the subassembly, stabilizes the subassembly and inserts to soil in, increase and soil between the power of being connected, reduce the probability that drops, need not to carry out a lot of and pull out and insert the convenience when improving the operation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the adjusting assembly of the present invention;
FIG. 3 is a schematic top view of the connection between the sleeve and the first nut of the present invention;
FIG. 4 is a schematic structural view of a stabilizing assembly of the present invention;
FIG. 5 is a schematic view of a connection structure of the thread bush and the plug of the present invention;
FIG. 6 is a schematic diagram of a high-speed control device in the prior art;
fig. 7 is a schematic structural diagram of a high-speed control device in the prior art.
In the figure: 1 drill steel, 2 adjusting assemblies, 201 sleeves, 202 first nuts, 203 first bolts, 204 horizontal rods, 205 second nuts, 206 second bolts, 207 top plates, 3 stabilizing assemblies, 301 inserted rods, 302 cavities, 303 risers, 304 screws, 305 driven bevel gears, 306 driving bevel gears, 307 rotating rods, 308 thread sleeves, 309 plugs and 310 driving mechanisms.
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.
Referring to fig. 1-3, the novel base layer paving elevation control device in the present embodiment includes a drill steel 1, the drill steel 1 is a smooth steel bar with a diameter of 22mm, and the length of the drill steel 1 is 1m, an adjusting component 2 is disposed on the outer surface of the drill steel 1, and a stabilizing component 3 is disposed at the bottom end of the drill steel 1.
The adjusting assembly 2 comprises a sleeve 201 which is in sliding connection with the outer surface of the drill steel 1, the sleeve 201 is a steel pipe with the wall thickness of 2mm, the inner diameter of the steel pipe is more than 25mm, the length of the steel pipe is 5cm, a first nut 202 is fixedly connected to the outer surface of the sleeve 201, a first bolt 203 is in threaded connection with the inner side of the first nut 202, a through hole is formed in the outer surface of the sleeve 201 and corresponds to the first nut 202, the first bolt 203 penetrates through the through hole and extends to the inside of the sleeve 201, the first bolt 203 is an M10 coarse thread pitch bolt, a horizontal rod 204 is fixedly connected to one end, far away from the first nut 202, of the outer surface of the sleeve 201, a second nut 205 is fixedly connected to one end, far away from the sleeve 201, of the horizontal rod 204, a second bolt 206 is in threaded connection with the inner side of the second nut 205, the second bolt 206 is an M8 fine thread pitch bolt, and a top plate 207 is rotatably connected to the top end of the second bolt 206.
Wherein, the steel wire recess has been seted up to the upper surface of roof 207, and the diameter of steel wire recess is 2mm, and the steel wire is conveniently fixed, reduces the probability that the steel wire appears droing.
Adjusting part 2 in this embodiment reciprocates through sleeve 201 to carry out spacingly by first bolt 203, realize rough flat regulation, and second bolt 206 drives roof 207 and removes, then realizes the fine flat regulation.
It should be noted that, the bearing seat is fixedly connected to the inner bottom of the top plate 207, and the top end of the second bolt 206 is fixedly connected to the inner side of the bearing seat, so that when the second bolt 206 rotates, the top plate 207 is prevented from rotating along with the second bolt, and thus adjustment is facilitated.
Referring to fig. 4-5, in order to improve the installation stability, the stabilizing assembly 3 in this embodiment includes an insert rod 301 fixedly connected to the bottom end of the drill rod 1, a cavity 302 is formed inside the insert rod 301, two vertical rods 303 are fixedly connected to the bottom wall of the cavity 302, a plurality of screws 304 are rotatably connected to the two vertical rods 303, driven bevel teeth 305 are fixedly connected to the outer surfaces of the screws 304, driving bevel teeth 306 are engaged with the driven bevel teeth 305, a rotating rod 307 is rotatably connected to the bottom end of the cavity 302, the driving bevel teeth 306 are fixed to the outer surface of the rotating rod 307, threaded sleeves 308 are respectively threadedly connected to the left and right ends of the outer surface of the screws 304, plugs 309 are respectively threadedly connected to the opposite ends of the outer surfaces of the two threaded sleeves 308, and a driving mechanism 310 is disposed between the rotating rod 307 and the insert rod 301.
Meanwhile, the driving mechanism 310 comprises a worm rotatably connected with the outer surface of the insert rod 301, a hand wheel is fixedly connected with the right end of the worm, the driving mechanism 310 further comprises a worm wheel fixedly connected with the top of the outer surface of the rotating rod 307, the worm is meshed with the worm wheel, and the worm rotates to drive the worm wheel to rotate, so that the rotating rod 307 rotates.
And, both ends all communicate to have a plurality of square holes of seting up on inserted bar 301 about cavity 302, thread bush 308 is squarely, and thread bush 308 and square hole sliding connection, avoid thread bush 308 to follow screw 304 and be circular motion, the screw thread opposite direction at both ends about the screw 304 surface, when screw 304 is rotatory, can make two thread bushes 308 remove to relative or the one end of carrying on the back mutually, plug 309 all is the toper with the one end that inserted bar 301 kept away from drill rod 1, conveniently insert in the soil.
The stabilizing assembly 3 in this embodiment drives the rotating rod 307 to rotate through the driving mechanism 310, and converts the rotating force of the rotating rod 307 into the moving force of the plug 309, so that the plug is inserted into the soil, and the stability after installation is improved.
Referring to fig. 6 to 7, in the prior art, a height control device is composed of a drill steel, a horizontal rod and an anti-drop nut, an elevation control device is inserted into two sides of a base pavement, the amount of the elevation control device inserted into soil is adjusted, so that elevation adjustment is performed, a steel wire is hung on the horizontal rod and is prevented from dropping by the anti-drop nut, and a leveling instrument of a paver moves on the steel wire.
The working principle of the above embodiment is as follows:
(1) insert inserted bar 301 in the soil, then through rotating the hand wheel, and it is rotatory to drive the worm, under the cooperation of worm wheel, it is rotatory to drive bull stick 307 and initiative taper tooth 306, it is rotatory to drive screw 304 by driven taper tooth 305, because the screw thread opposite direction at both ends about the screw 304 surface, and thread bush 308 is squarely, and slide in the square hole, can restrict thread bush 308 and follow screw 304 and do circular motion, and make thread bush 308 horizontal migration, thereby drive inserted bar 309 and insert in the soil, improve the power of being connected between with the soil, and reduce and break away from the risk, a plurality of inserted bars 301 form high programme-control system stake with borer 1.
(2) After the elevation control pile is laid, the sleeve 201 is sleeved on the outer surface of the drill rod 1, the leveling rod is erected on the top plate 207, the position of the sleeve 201 on the outer surface of the drill rod 1 is adjusted by rotating the first bolt 203 according to the design elevation, rough leveling adjustment is performed, the second bolt 203 is screwed after adjustment is completed, the sleeve 201 is fixed, the leveling rod is erected on the top plate 207 again, the lower end of the second bolt 203 is rotated until the elevation meets the design requirement, then the steel wire is hung in a steel wire groove in the top plate 207, the steel wire is in a tensioning state due to the fact that the second bolt 203 and the top plate 207 are connected through the bearing, and when the second bolt 203 rotates, the top plate 207 cannot rotate along with the steel wire, and therefore adjustment can be performed in the laying process.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
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 (10)
1. The utility model provides a novel elevation control that paves of basic unit device, includes drill rod (1), its characterized in that: the outer surface of the steel chisel (1) is provided with an adjusting component (2), and the bottom end of the steel chisel (1) is provided with a stabilizing component (3);
the adjusting assembly (2) comprises a sleeve (201) which is in sliding connection with the outer surface of the steel drill rod (1), a first nut (202) is fixedly connected to the outer surface of the sleeve (201), a first bolt (203) is in threaded connection with the inner side of the first nut (202), a horizontal rod (204) is fixedly connected to one end, far away from the first nut (202), of the outer surface of the sleeve (201), a second nut (205) is fixedly connected to one end, far away from the sleeve (201), of the horizontal rod (204), a second bolt (206) is in threaded connection with the inner side of the second nut (205), and a top plate (207) is rotatably connected to the top end of the second bolt (206).
2. The novel device for controlling the paving elevation of the base layer as claimed in claim 1, wherein: the drill rod (1) is a smooth round steel bar with the diameter of 22mm, the length of the drill rod (1) is 1m, the sleeve (201) is a steel pipe with the wall thickness of 2mm, the inner diameter of the steel pipe is more than 25mm, and the length of the steel pipe is 5 cm.
3. The novel device for controlling the paving elevation of the base layer as claimed in claim 1, wherein: the second bolt (206) is an M8 fine pitch bolt, and the first bolt (203) is an M10 coarse pitch bolt.
4. The novel device for controlling the paving elevation of the base layer as claimed in claim 1, wherein: the outer surface of the sleeve (201) is provided with a through hole, the through hole corresponds to the first nut (202), and the first bolt (203) penetrates through the through hole and extends to the inside of the sleeve (201).
5. The novel device for controlling the paving elevation of the base layer as claimed in claim 1, wherein: the inner bottom of the top plate (207) is fixedly connected with a bearing seat, and the top end of the second bolt (206) is fixedly connected with the inner side of the bearing seat.
6. The novel device for controlling the paving elevation of the base layer as claimed in claim 1, wherein: the upper surface of roof (207) has seted up the steel wire recess, and the diameter of steel wire recess is 2 mm.
7. The novel device for controlling the paving elevation of the base layer as claimed in claim 1, wherein: stabilize subassembly (3) include with drill rod (1) bottom fixed connection's inserted bar (301), cavity (302) have been seted up to the inside of inserted bar (301), two montants (303) of the diapire fixedly connected with of cavity (302), two it is connected with a plurality of screw rods (304) to rotate on montant (303), the driven awl tooth (305) of outer fixed surface of screw rod (304), the meshing has initiative awl tooth (306) on driven awl tooth (305), the bottom of cavity (302) is rotated and is connected with bull stick (307), the equal threaded connection in both ends has thread bush (308), two about screw rod (304) surface equal threaded connection in one end that thread bush (308) surface carried on the back has plug (309), be equipped with actuating mechanism (310) between bull stick (307) and inserted bar (301).
8. The novel device for controlling the paving elevation of a base layer as claimed in claim 7, wherein: the driving mechanism (310) comprises a worm rotatably connected with the outer surface of the insert rod (301), a hand wheel is fixedly connected with the right end of the worm, the driving mechanism (310) further comprises a worm wheel fixedly connected with the top of the outer surface of the rotating rod (307), and the worm is meshed with the worm wheel.
9. The novel device for controlling the paving elevation of a base layer as claimed in claim 7, wherein: the driving bevel gear (306) is fixed on the outer surface of the rotating rod (307), the left end and the right end of the cavity (302) are communicated with a plurality of square holes formed in the inserted rod (301), the threaded sleeve (308) is square, and the threaded sleeve (308) is in sliding connection with the square holes.
10. The novel device for controlling the paving elevation of a base layer as claimed in claim 7, wherein: the thread directions of the left end and the right end of the outer surface of the screw rod (304) are opposite, and the plug (309) and one end of the inserted bar (301) far away from the steel chisel (1) are both conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210365208.8A CN114855567A (en) | 2022-04-08 | 2022-04-08 | Novel elevation control that paves of basic unit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210365208.8A CN114855567A (en) | 2022-04-08 | 2022-04-08 | Novel elevation control that paves of basic unit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114855567A true CN114855567A (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210365208.8A Pending CN114855567A (en) | 2022-04-08 | 2022-04-08 | Novel elevation control that paves of basic unit device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207091890U (en) * | 2017-08-28 | 2018-03-13 | 中建筑港集团有限公司 | A kind of steady elevation control device of new type water |
| CN211816022U (en) * | 2020-03-26 | 2020-10-30 | 武海红 | Slope protection net for hydraulic engineering |
| CN212477354U (en) * | 2020-05-12 | 2021-02-05 | 贵州湘越工程有限公司 | Steel chisel for road paving construction lofting |
| CN214459409U (en) * | 2020-12-15 | 2021-10-22 | 中交一公局第四工程有限公司 | High-precision wire hanging adjusting device for elevation control of spreading machine |
| CN215329207U (en) * | 2021-01-05 | 2021-12-28 | 内蒙古公路交通投资发展有限公司 | Suspension wire reference leveling bracket for paver |
| DE202021106683U1 (en) * | 2020-12-31 | 2022-01-26 | China Railway Erju 5Th Engineering Co., Ltd. | Height control device for an asphalt pavement |
-
2022
- 2022-04-08 CN CN202210365208.8A patent/CN114855567A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207091890U (en) * | 2017-08-28 | 2018-03-13 | 中建筑港集团有限公司 | A kind of steady elevation control device of new type water |
| CN211816022U (en) * | 2020-03-26 | 2020-10-30 | 武海红 | Slope protection net for hydraulic engineering |
| CN212477354U (en) * | 2020-05-12 | 2021-02-05 | 贵州湘越工程有限公司 | Steel chisel for road paving construction lofting |
| CN214459409U (en) * | 2020-12-15 | 2021-10-22 | 中交一公局第四工程有限公司 | High-precision wire hanging adjusting device for elevation control of spreading machine |
| DE202021106683U1 (en) * | 2020-12-31 | 2022-01-26 | China Railway Erju 5Th Engineering Co., Ltd. | Height control device for an asphalt pavement |
| CN215329207U (en) * | 2021-01-05 | 2021-12-28 | 内蒙古公路交通投资发展有限公司 | Suspension wire reference leveling bracket for paver |
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