CN112921763A - Hydraulic vibration rammer for repairing pavement with uniformly backfilled gravel - Google Patents
Hydraulic vibration rammer for repairing pavement with uniformly backfilled gravel Download PDFInfo
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- CN112921763A CN112921763A CN202110102441.2A CN202110102441A CN112921763A CN 112921763 A CN112921763 A CN 112921763A CN 202110102441 A CN202110102441 A CN 202110102441A CN 112921763 A CN112921763 A CN 112921763A
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- fixedly connected
- box body
- plate
- uniformly
- rail
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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
- E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4833—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with tamping or vibrating means for consolidating or finishing, e.g. immersed vibrators, with or without non-vibratory or non-percussive pressing or smoothing means
- E01C19/4853—Apparatus designed for railless operation, e.g. crawler-mounted, provided with portable trackway arrangements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention relates to the technical field of hydraulic vibration rammers, and discloses a hydraulic vibration rammer for pavement restoration with uniformly backfilled gravel, which comprises a fixed frame, wherein four rail plates are fixedly connected between the left inner wall and the right inner wall of the fixed frame, a box body is arranged on the left side below the rammer plate, a blanking hopper is fixedly connected to the bottom of the box body, two arc-shaped bottom plates are fixedly connected to the inner bottom wall of the box body, two driven wheels are rotatably connected to the lower parts of the front surface and the back surface of the box body, rotating cylinders are fixedly connected between the driven wheels on two opposite sides, ejector rods which are uniformly arranged are fixedly connected to the outer parts of the two rotating cylinders, and two fixed cylinders are fixedly. Through from driving wheel and the meshing of below rail plate, drive the rotation of a section of thick bamboo from the driving wheel, drive the ejector pin and beat the arc bottom plate when rotating a section of thick bamboo, make the arc bottom plate vibrations to reached the grit in the box when the blanking mouth is opened and can fallen the effect in the recess smoothly, avoided the grit to plug up the blanking mouth.
Description
Technical Field
The invention relates to the technical field of hydraulic vibratory rammers, in particular to a hydraulic vibratory rammer for repairing a pavement with uniformly backfilled gravels.
Background
The vibrating rammer is used for ramming ground, and can be used for ramming plane, inclined plane, step, groove, pit, corner and abutment back, etc. and is extensively used in ramming industry, and is usually matched with vibrating road roller.
When the vibrating rammer works, the same position is generally vibrated repeatedly, a groove can be formed in the ground with soft soil, the ground which is rammed is uneven, workers generally move the vibrating rammer away, gravel is backfilled at the position of the groove, then the vibrating rammer is used again for ramming, manual backfilling not only reduces ramming efficiency, but also is easy to cause uneven scattering of the gravel in the groove, and therefore the hydraulic vibrating rammer for repairing the pavement with the uniformly-backfilled gravel is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the hydraulic vibratory tamper for repairing the pavement with uniformly backfilled gravel, which has the advantage that the gravel can be uniformly backfilled without moving the vibratory tamper, and solves the problems that when a groove is backfilled, a worker generally moves the vibratory tamper, then the gravel is backfilled at the position of the groove, and then the vibratory tamper is used again for tamping, so that the tamping efficiency is reduced and the gravel in the groove is easily scattered unevenly due to manual backfilling.
(II) technical scheme
In order to realize the aim of uniformly backfilling the sandstone without moving the vibratory tamper, the invention provides the following technical scheme: a hydraulic vibration rammer for pavement restoration with uniformly backfilled gravel comprises a fixed frame, wherein the top of the fixed frame is fixedly connected with a top plate, the top of the top plate is fixedly connected with a hydraulic cylinder, the bottom of the hydraulic cylinder is fixedly connected with a ramming plate, four rail plates are fixedly connected between the left inner wall and the right inner wall of the fixed frame, rail grooves are formed in the front surfaces of the four rail plates, a box body is arranged on the left side below the ramming plate, the bottom of the box body is fixedly connected with a blanking hopper, the inner bottom wall of the box body is fixedly connected with two arc-shaped bottom plates, two driven wheels are rotatably connected below the front surface and the back surface of the box body, rotating cylinders are fixedly connected between the driven wheels on two opposite sides, ejector rods which are uniformly arranged are fixedly connected to the outer parts of the two rotating cylinders, magnetic blocks which are uniformly arranged are fixedly, two the bottom of a fixed section of thick bamboo all is pegged graft there is the movable rod, two the bottom fixedly connected with montant of movable rod, two fixed plates of top fixedly connected with of box, the back the top fixedly connected with motor of fixed plate, the front of motor is rotated and is connected with the action wheel.
Preferably, the front side and the rear side of the box body and one side of the two fixed plates opposite to each other are fixedly connected with sliding blocks, and the sliding blocks are respectively positioned in the rail grooves to play a role in guiding.
Preferably, the top of the upper rail plate is provided with teeth meshed with the driving wheel, the driving wheel drives the box body to move left and right through being meshed with the rail plate when rotating, the bottom of the lower rail plate is provided with teeth meshed with the driven wheel, and the box body drives the driven wheel to rotate through being meshed with the rail plate when driving the driven wheel to move left and right.
Preferably, the bottom of montant all fixedly connected with ball stopper, the blanking mouth that the equidistance was arranged is seted up at the top of blanking fill, and the ball stopper is located the blanking mouth respectively, plays the effect of plugging up the blanking fill.
Preferably, two the outside of movable rod all cup joints reset spring, plays the effect that drives the movable rod and reset downwards.
Preferably, the tops of the two movable rods are fixedly connected with magnetic devices, the magnetism of the magnetic devices is opposite to that of the magnetic blocks, and the magnetic devices and the magnetic blocks attract each other when approaching each other.
Preferably, the distance between two of the magnetic blocks which are farthest away is the same as the width of the tamping plate, so that the magnetic blocks control the blanking hopper to be in an opening and closing state when the blanking hopper is positioned below the groove formed by tamping of the tamping plate.
(III) advantageous effects
Compared with the prior art, the invention provides the hydraulic vibratory tamper for repairing the pavement with uniformly backfilled gravels, which has the following beneficial effects:
1. the hydraulic vibration rammer for repairing the pavement with uniformly backfilled gravels drives the rammer plate to tamp the ground repeatedly downwards through the hydraulic cylinder, when a formed groove is deep, the hydraulic cylinder is controlled to drive the rammer plate to move upwards to the top to stop, then the motor is started to drive the driving wheel to rotate, the driving wheel is meshed with teeth on the upper rail plate to enable the box body to move rightwards when rotating, when the blanking hopper moves rightwards to the position above the groove, the magnetic device at the top of the movable rod is just close to the leftmost magnetic block, the magnetic block drives the movable rod to move upwards through attracting the magnetic device, and further the ball plug is driven to move upwards through the vertical rod to open the blanking port, after the box body moves to the rightmost side, the motor rotates reversely to drive the box body to move leftwards to reset, the gravels in the box body in the left-right moving process can uniformly fall into the groove through the blanking port and the blanking hopper, thereby achieving the, the overall efficiency of ramming is improved.
2. This hydraulic pressure vibrations rammer for road surface restoration that grit evenly backfilled, through being provided with a plurality of magnetic paths that have certain interval, when the movable rod on the box controlled about the magnetic path below, when moving the interval between the adjacent magnetic path, the outside reset spring of movable rod can drive movable rod and montant downstream, before stopping up the blanking fill, just remove another magnetic path below, the montant rebound once more, thereby it stirs grit in the box to drive the ball stopper and reciprocate, it meshes from driving wheel and below rail plate around both sides around it when the box controlled about simultaneously, it rotates to drive the rotor from the driving wheel, it beats the arc bottom plate to drive the ejector pin when rotating the rotor, make the arc bottom plate vibrate, thereby reached the effect that the grit in the box can drop smoothly in the recess when blanking mouth was opened, avoided the grit to plug up the blanking mouth.
Drawings
FIG. 1 is a schematic front view of the overall structure of the present invention;
FIG. 2 is a left side schematic view of the overall structure of the present invention;
FIG. 3 is an enlarged schematic view of the structure of the case shown in FIG. 1 according to the present invention;
fig. 4 is an enlarged left side view of the driven wheel and rotary drum structure of the present invention.
In the figure: 1. a fixed mount; 2. a top plate; 3. a hydraulic cylinder; 4. tamping plates; 5. a rail plate; 6. a rail groove; 7. a box body; 8. a blanking hopper; 9. an arc-shaped bottom plate; 10. a driven wheel; 11. a rotating cylinder; 12. a top rod; 13. a magnetic block; 14. a fixed cylinder; 15. a movable rod; 16. a vertical rod; 17. a fixing plate; 18. a motor; 19. a driving wheel.
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. 1-4, a hydraulic vibratory tamper for pavement restoration with uniformly backfilled gravel comprises a fixed frame 1, a top plate 2 fixedly connected to the top of the fixed frame 1, a hydraulic cylinder 3 fixedly connected to the top of the top plate 2, a tamping plate 4 fixedly connected to the bottom of the hydraulic cylinder 3, four rail plates 5 fixedly connected between the left and right inner walls of the fixed frame 1, rail grooves 6 respectively formed on the front surfaces of the four rail plates 5, a box body 7 disposed on the left side below the tamping plate 4, a blanking hopper 8 fixedly connected to the bottom of the box body 7, two arc-shaped bottom plates 9 fixedly connected to the inner bottom wall of the box body 7, two driven wheels 10 rotatably connected to the lower portions of the front and back surfaces of the box body 7, rotating cylinders 11 fixedly connected between the driven wheels 10 on the opposite sides, ejector rods 12 uniformly arranged outside the two rotating cylinders 11, and magnetic blocks 13 uniformly arranged at the bottom of the, the distance between two apart from the farthest in magnetic path 13 is the same with the width of ramming plate 4, magnetic path 13 control blanking fill 8 is in the state that opens and shuts when making blanking fill 8 be located ramming the recess below that forms of ramming plate 4, two fixed section of thick bamboo 14 of the interior roof fixedly connected with of box 7, movable rod 15 has all been pegged graft to the bottom of two fixed section of thick bamboo 14, reset spring has all been cup jointed to the outside of two movable rod 15, play the effect that drives movable rod 15 and reset downwards, the equal fixedly connected with magnetic means in top of two movable rod 15, magnetic means's magnetism is opposite with magnetic path 13, both can attract each other when being close to, the bottom fixedly connected with montant 16 of two movable rod 15, the equal fixedly connected with ball stopper in bottom of montant 16, the blanking mouth that the equidistance blanking was arranged is seted up at the top of blanking fill 8, the ball stopper is located the mouth respectively.
Two fixed plates 17 of top fixedly connected with of box 7, the equal fixedly connected with slider in both sides and two fixed plates 17 opposite side around the box 7, the slider is located rail groove 6 respectively, play the effect of direction, the top fixedly connected with motor 18 of back fixed plate 17, the front of motor 18 is rotated and is connected with action wheel 19, the top of top rail board 5 is provided with the tooth with action wheel 19 meshing, control the removal about the box 7 is driven through meshing with rail board 5 when action wheel 19 rotates, the bottom of below rail board 5 is provided with and drives from the tooth of driving wheel 10 meshing, box 7 drives and drives from driving wheel 10 rotation through meshing with rail board 5 when moving from the driving wheel 10 and removing.
The working principle is as follows: when the sand-rock backfilling machine is used, the tamping plate 4 is driven to tamp downwards repeatedly to the ground through the hydraulic cylinder 3, when a formed groove is deep, the hydraulic cylinder 3 is controlled to drive the tamping plate 4 to move upwards to the top to stop, then the motor 18 is started, the motor 18 drives the driving wheel 19 to rotate, the driving wheel 19 is meshed with teeth on the upper rail plate 5 when rotating, the box body 7 moves rightwards, when the blanking hopper 8 moves rightwards to the position above the groove, the magnetic device at the top of the movable rod 15 is just close to the leftmost magnetic block 13, the magnetic block 13 drives the movable rod 15 to move upwards through attracting the magnetic device, the ball plug is driven to move upwards through the vertical rod 16 to open the blanking port, after the box body 7 moves rightwards, the motor 18 rotates reversely to drive the box body 7 to move leftwards to reset, sand-rock inside the box body 7 in the process of moving leftwards and rightwards uniformly falls into the groove through the blanking port and the blanking hopper 8 to vibrate, and, the overall efficiency of ramming is improved; through being provided with a plurality of magnetic paths 13 that have certain interval, when movable rod 15 on box 7 controlled about magnetic path 13 below, when moving the interval between the adjacent magnetic path 13, the outside reset spring of movable rod 15 can drive movable rod 15 and montant 16 downstream, before blockking up blanking fill 8, just remove another magnetic path 13 below, montant 16 rebound once more, thereby it stirs grit in the box 7 to drive the ball stopper and reciprocate, from driving wheel 10 and the meshing of below rail 5 of both sides around it when box 7 controlled about simultaneously, from driving wheel 10 and drive rotating cylinder 11 and rotate, drive ejector pin 12 when rotating cylinder 11 rotates and beat arc bottom plate 9, make arc bottom plate 9 vibrations, thereby reached the effect that the grit in the box 7 can fall in the recess smoothly when the blanking mouth was opened, avoided the grit to block up the blanking mouth.
To sum up, the hydraulic vibration rammer for repairing road surface with uniformly backfilled gravel uses a hydraulic cylinder 3 to drive a ramming plate 4 to tamp the ground repeatedly downwards, when a formed groove is deep, the hydraulic cylinder 3 is controlled to drive the ramming plate 4 to move upwards to the top to stop, then a motor 18 is started, the motor 18 drives a driving wheel 19 to rotate, the driving wheel 19 rotates to enable a box body 7 to move rightwards by meshing with teeth on an upper rail plate 5, when a blanking hopper 8 moves rightwards to the position above the groove, a magnetic device at the top of a movable rod 15 is just close to a magnetic block 13 at the leftmost side, the magnetic block 13 drives the movable rod 15 to move upwards by a magnetic attraction device, a ball plug is driven by a vertical rod 16 to move upwards to open a blanking port, after the box body 7 moves rightwards, the motor 18 rotates reversely to drive the box body 7 to move leftwards to reset, the gravel inside the box body 7 uniformly falls into the groove through the blanking port and, thereby reached and need not move the effect that just can evenly backfill grit to the recess with the vibrations rammer body, improved the whole efficiency of ramming.
By arranging a plurality of magnetic blocks 13 with certain intervals, when the movable rod 15 on the box body 7 moves left and right under the magnetic blocks 13, when the magnetic blocks move to the interval between the adjacent magnetic blocks 13, the return spring outside the movable rod 15 can drive the movable rod 15 and the vertical rod 16 to move downwards, before the blanking hopper 8 is blocked, it moves under another magnetic block 13, the vertical rod 16 moves upwards again, thereby driving the ball plug to move up and down to stir the gravel in the box body 7, simultaneously driving driven wheels 10 at the front side and the rear side of the box body 7 to be meshed with the lower rail plate 5 when the box body 7 moves left and right, driving the rotating cylinder 11 to rotate by the driven wheels 10, driving the ejector rod 12 to knock the arc-shaped bottom plate 9 when the rotating cylinder 11 rotates, and leading the arc-shaped bottom plate 9 to vibrate, thereby reached when blanking mouth is opened the grit in the box 7 can fall the effect in the recess smoothly, avoided the grit to plug up the blanking mouth, application scope is more extensive.
Having shown and described embodiments of the present invention, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a hydraulic pressure vibrations rammer for road surface restoration that grit was evenly backfilled, includes mount (1), its characterized in that: the top of the fixing frame (1) is fixedly connected with a top plate (2), the top of the top plate (2) is fixedly connected with a hydraulic cylinder (3), the bottom of the hydraulic cylinder (3) is fixedly connected with a ramming plate (4), four rail plates (5) are fixedly connected between the left inner wall and the right inner wall of the fixing frame (1), rail grooves (6) are formed in the front faces of the four rail plates (5), a box body (7) is arranged on the left side below the ramming plate (4), a blanking hopper (8) is fixedly connected to the bottom of the box body (7), two arc-shaped bottom plates (9) are fixedly connected to the inner bottom wall of the box body (7), two driven wheels (10) are rotatably connected below the front face and the back face of the box body (7), rotating cylinders (11) are fixedly connected between the driven wheels (10) on two opposite sides, and ejector rods (12) which are uniformly arranged, top the magnetic path (13) that the equal fixedly connected with equidistance in bottom of rail board (5) was arranged, two solid fixed cylinder (14) of interior roof fixedly connected with of box (7), two the bottom of solid fixed cylinder (14) is all pegged graft and is had movable rod (15), two the bottom fixedly connected with montant (16) of movable rod (15), two fixed plate (17) of top fixedly connected with of box (7), the back the top fixedly connected with motor (18) of fixed plate (17), the front of motor (18) is rotated and is connected with action wheel (19).
2. The hydraulic vibratory tamper for repairing the pavement with uniformly backfilled gravel according to claim 1, which is characterized in that: the front side and the rear side of the box body (7) and one side of the two fixed plates (17) opposite to each other are fixedly connected with sliding blocks, and the sliding blocks are respectively positioned in the rail grooves (6).
3. The hydraulic vibratory tamper for repairing the pavement with uniformly backfilled gravel according to claim 1, which is characterized in that: the top of the upper rail plate (5) is provided with teeth meshed with the driving wheel (19), and the bottom of the lower rail plate (5) is provided with teeth meshed with the driven wheel (10).
4. The hydraulic vibratory tamper for repairing the pavement with uniformly backfilled gravel according to claim 1, which is characterized in that: the equal fixedly connected with ball stopper in bottom of montant (16), the blanking mouth of equidistance range is seted up at the top of blanking fill (8), and the ball stopper is located the blanking mouth respectively.
5. The hydraulic vibratory tamper for repairing the pavement with uniformly backfilled gravel according to claim 1, which is characterized in that: and the outside of the two movable rods (15) is sleeved with a return spring.
6. The hydraulic vibratory tamper for repairing the pavement with uniformly backfilled gravel according to claim 1, which is characterized in that: the tops of the two movable rods (15) are fixedly connected with magnetic devices.
7. The hydraulic vibratory tamper for repairing the pavement with uniformly backfilled gravel according to claim 1, which is characterized in that: the distance between two farthest magnetic blocks (13) is the same as the width of the tamper plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110102441.2A CN112921763A (en) | 2021-01-26 | 2021-01-26 | Hydraulic vibration rammer for repairing pavement with uniformly backfilled gravel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110102441.2A CN112921763A (en) | 2021-01-26 | 2021-01-26 | Hydraulic vibration rammer for repairing pavement with uniformly backfilled gravel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112921763A true CN112921763A (en) | 2021-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110102441.2A Withdrawn CN112921763A (en) | 2021-01-26 | 2021-01-26 | Hydraulic vibration rammer for repairing pavement with uniformly backfilled gravel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112921763A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293435A (en) * | 2022-01-19 | 2022-04-08 | 佛山市南海市政工程有限公司 | Compaction device for asphalt pavement and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2697037A1 (en) * | 1992-10-16 | 1994-04-22 | Applic Derives Asphalte | Self-propelled finisher for making good roads after trench excavation - includes rear mounted sliding spreader extending beyond chassis sides, two strip width sliding pads, and conveyor belts between hopper and spreader |
| US5352063A (en) * | 1992-09-30 | 1994-10-04 | Allen Engineering Corporation | Polymer concrete paving machine |
| CN206828934U (en) * | 2017-05-02 | 2018-01-02 | 任壬 | A kind of pitch-rood |
| CN206873259U (en) * | 2017-02-20 | 2018-01-12 | 安艳彬 | A kind of Portable broken-stone material distributing machine for road pavement defect treatment |
| CN108149550A (en) * | 2017-12-17 | 2018-06-12 | 蒋杰 | A kind of adjustable road-metal spreading machine of anti-clogging |
| CN209211224U (en) * | 2018-11-16 | 2019-08-06 | 王岩 | A kind of civil engineering is used with the road surfacing device for shakeouing function |
| CN209854695U (en) * | 2019-04-09 | 2019-12-27 | 张新宇 | Tamping device for foundation construction |
| CN210529673U (en) * | 2019-07-01 | 2020-05-15 | 山西冶金岩土工程勘察有限公司 | Foundation engineering reinforcing mechanism |
| CN111622056A (en) * | 2020-06-10 | 2020-09-04 | 袁玉玲 | Town road pitch laying device |
| CN212336032U (en) * | 2020-05-25 | 2021-01-12 | 靳艳丽 | Earthwork filling machine for water conservancy construction |
-
2021
- 2021-01-26 CN CN202110102441.2A patent/CN112921763A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5352063A (en) * | 1992-09-30 | 1994-10-04 | Allen Engineering Corporation | Polymer concrete paving machine |
| FR2697037A1 (en) * | 1992-10-16 | 1994-04-22 | Applic Derives Asphalte | Self-propelled finisher for making good roads after trench excavation - includes rear mounted sliding spreader extending beyond chassis sides, two strip width sliding pads, and conveyor belts between hopper and spreader |
| CN206873259U (en) * | 2017-02-20 | 2018-01-12 | 安艳彬 | A kind of Portable broken-stone material distributing machine for road pavement defect treatment |
| CN206828934U (en) * | 2017-05-02 | 2018-01-02 | 任壬 | A kind of pitch-rood |
| CN108149550A (en) * | 2017-12-17 | 2018-06-12 | 蒋杰 | A kind of adjustable road-metal spreading machine of anti-clogging |
| CN209211224U (en) * | 2018-11-16 | 2019-08-06 | 王岩 | A kind of civil engineering is used with the road surfacing device for shakeouing function |
| CN209854695U (en) * | 2019-04-09 | 2019-12-27 | 张新宇 | Tamping device for foundation construction |
| CN210529673U (en) * | 2019-07-01 | 2020-05-15 | 山西冶金岩土工程勘察有限公司 | Foundation engineering reinforcing mechanism |
| CN212336032U (en) * | 2020-05-25 | 2021-01-12 | 靳艳丽 | Earthwork filling machine for water conservancy construction |
| CN111622056A (en) * | 2020-06-10 | 2020-09-04 | 袁玉玲 | Town road pitch laying device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293435A (en) * | 2022-01-19 | 2022-04-08 | 佛山市南海市政工程有限公司 | Compaction device for asphalt pavement and construction method thereof |
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Application publication date: 20210608 |