CN112726343A - Asphalt laying device and method for highway construction - Google Patents
Asphalt laying device and method for highway construction Download PDFInfo
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- CN112726343A CN112726343A CN202011626914.0A CN202011626914A CN112726343A CN 112726343 A CN112726343 A CN 112726343A CN 202011626914 A CN202011626914 A CN 202011626914A CN 112726343 A CN112726343 A CN 112726343A
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- asphalt
- stirring
- material receiving
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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
- E01C19/4806—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 solely rollers for consolidating or finishing
- E01C19/4826—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 solely rollers for consolidating or finishing the materials being aggregate mixed with binders
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses an asphalt laying device and method for highway construction, which comprises a base and traveling wheels arranged on the left side and the right side of the base for traveling, wherein a stirring barrel for storing asphalt materials is arranged at the upper end of the base, a stirring component for stirring asphalt is arranged in the stirring barrel, a paving component for uniformly paving the asphalt on a road surface is arranged at the right end of the base, and a conveying component for conveying the asphalt is arranged between the paving component and the stirring barrel.
Description
Technical Field
The invention relates to the technical field of highway equipment, in particular to an asphalt paving device and method for highway construction.
Background
The asphalt is a black-brown complex mixture composed of hydrocarbons with different molecular weights and nonmetal derivatives thereof, is in a liquid state, a semi-solid state or a solid state, and is a waterproof, moistureproof and anticorrosive organic cementing material. It is used in paint, plastic, rubber and other industry, road surface paving and other fields. Asphalt is solid-state at ordinary temperature, so need heat when using and melt solid-state asphalt, heating temperature generally is about 120 ℃, the asphalt heating of prior art generally is through boiler heating, be unfavorable for going out to carry the operation, consume a large amount of manpower and materials and time, lead to production efficiency low, current patent publication No. CN 108824142B's patent has announced a road construction with pitch laying device who has stirring function, the device can stir and lay asphalt, but the device is difficult to evenly with the pitch tiling when laying asphalt, need assist with the help of the vibration form, but this kind of vibration mode is unfavorable for improving the life of device.
In view of the above problems, an asphalt paving apparatus and method for road construction are now provided.
Disclosure of Invention
The invention aims to provide an asphalt paving device and method for road construction, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an asphalt laying device for highway construction comprises a base and travelling wheels arranged on the left side and the right side of the base and used for travelling, wherein a stirring barrel used for storing asphalt materials is arranged at the upper end of the base, a stirring assembly used for stirring asphalt is arranged in the stirring barrel, a paving assembly used for uniformly paving the asphalt on a road surface is arranged at the right end of the base, and a conveying assembly used for conveying the asphalt is arranged between the paving assembly and the stirring barrel;
the conveying assembly comprises a buffer column for buffering asphalt, the buffer column is fixedly connected with the base through a support rod, a fixed material receiving barrel is arranged at the feeding end on the left side of the buffer column, a movable material receiving barrel is arranged at the end part of the fixed material receiving barrel in a sliding mode, the movable material receiving barrel corresponds to the discharging position of the stirring assembly, a pushing block is arranged on the outer side of the movable material receiving barrel, and the pushing block is connected with a material receiving pushing rod used for driving the movable material receiving barrel to slide along the surface of the fixed material receiving barrel;
and a plurality of shunt pipes for guiding asphalt into the tiling assembly are arranged on the right side of the cache column.
As a further scheme of the invention: the tiling subassembly is including rolling the roller, it is fixed with the base through the connecting piece to roll roller one end.
As a further scheme of the invention: the connecting piece includes the installation piece that the level set up, the inside slotted hole that has seted up of installation piece, the cooperation is equipped with a buffering slider in the slotted hole, rotate on the buffering slider and be equipped with one with the roller end connection's that rolls the roller axle, the buffering slider both ends are equipped with the buffer spring with slotted hole inner wall connection, and the connecting piece still includes the piece of increaseing that will install the piece and be connected with the base.
As a further scheme of the invention: the height-adjusting piece comprises a connecting rod connected with one end of the mounting block, a guide sleeve is arranged on the connecting rod, the guide sleeve is arranged on a guide post at the upper end of the base in a sliding mode, a lifting screw hole is formed in one end, far away from the mounting block, of the connecting rod, a lifting screw rod is arranged in the lifting screw hole in a matched mode, and the lower end of the lifting screw rod is fixedly connected with the output end of the lifting motor.
As a further scheme of the invention: the utility model discloses a roller, including the first cylinder of grinding roller and the second cylinder of slip setting in its inner chamber, be equipped with the sealing washer between second cylinder and the first cylinder, stock solution chamber has been found to second cylinder and first cylinder inner chamber, the inside passageway that communicates with the stock solution chamber that is equipped with of rotation roller, the rotation roller tip rotates and is equipped with a rotation cover, the port that rotates the cover is connected with the water storage box on base surface through the drain hose, the inside liquid pump that is used for sending into its inside liquid or take the stock solution chamber out that is equipped with of water storage box.
As a still further scheme of the invention: and a sealing ring matched with the movable material receiving barrel is arranged on the inner wall of the fixed material receiving barrel.
As a still further scheme of the invention: the buffer memory post both ends symmetry is equipped with a width push rod, the output of width push rod is connected with the inside piston ejector pad of buffer memory post, has built the cavity of buffer memory pitch between two piston ejector pads, adjusts the interval of two piston ejector pads through the width push rod and can adjust ejection of compact width, just so can adjust according to different width road surfaces.
As a still further scheme of the invention: the stirring assembly comprises a lifting cylinder coaxially arranged inside the stirring barrel, a stirring motor is installed on the upper end face of the lifting cylinder, the output end of the stirring motor is provided with a stirring shaft penetrating through the inside of the lifting cylinder, the surface of the stirring shaft is provided with stirring blades used for lifting asphalt, the upper right side of the lifting cylinder is provided with a discharging pipe used for returning materials, the outer side of the lifting cylinder is fixedly connected with the inner wall of the stirring barrel through a positioning rod, the lower end of the stirring shaft is connected with a scraping rod tightly attached to the inner wall of the stirring barrel, and a plurality of stirring rods extending towards the lifting cylinder are distributed in the vertical section of the scraping rod.
Compared with the prior art, the invention has the beneficial effects that: the asphalt feeding device is designed aiming at the defects of the existing device, can circularly stir asphalt, can divide the feeding asphalt into a plurality of strands according to the width of the paved asphalt, is beneficial to uniform paving, can adjust the asphalt feeding device according to pavements with different widths, and has strong practicability.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural view of the back side of the present invention.
Fig. 3 is a schematic view of the internal structure of the present invention.
Wherein: the device comprises a base 11, traveling wheels 12, a stirring rod 13, a scraping rod 14, a stirring barrel 15, a lifting barrel 16, stirring blades 17, a stirring shaft 18, a stirring motor 19, a movable material receiving barrel 20, a fixed material receiving barrel 21, a material receiving push rod 22, a buffer column 23, a shunt tube 24, a rolling roller 25, a rotating roller shaft 26, a buffer slide block 27, a buffer spring 28, a mounting block 29, a connecting rod 30, a guide sleeve 31, a lifting motor 32, a width push rod 33, a support rod 34, a water storage tank 35, a liquid guide hose 36, a rotating sleeve 37, a first roller 38 and a second roller 39.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
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.
Example 1
Referring to fig. 1-3, in the embodiment of the present invention, an asphalt paving device for road construction includes a base 11 and road wheels 12 disposed on left and right sides of the base for walking, a stirring barrel 15 for storing asphalt is disposed at an upper end of the base 11, a stirring assembly for stirring asphalt is disposed inside the stirring barrel 15, a paving assembly for uniformly paving asphalt on a road surface is disposed at a right end of the base 11, and a conveying assembly for conveying asphalt is disposed between the paving assembly and the stirring barrel 15;
the flat laying assembly comprises a rolling roller 25, and one end of the rolling roller 25 is fixedly connected with the base 11 through a connecting piece;
the connecting piece comprises a horizontally arranged mounting block 29, a sliding groove hole is formed in the mounting block 29, a buffer slide block 27 is arranged in the sliding groove hole in a matching mode, a rotating roller shaft 26 connected with the end part of the rolling roller 25 is rotatably arranged on the buffer slide block 27, buffer springs 28 connected with the inner wall of the sliding groove hole are arranged at two ends of the buffer slide block 27, the buffer slide block 27 can slide in the sliding groove hole when the rolling roller is impacted, the buffer springs 28 can absorb impact force, and an adjusting piece used for adjusting the height of the rolling roller 25 is arranged between the mounting block 29 and the base 11 so as to switch the state of the rolling roller 25;
the height adjusting piece comprises a connecting rod 30 connected with one end of the mounting block 29, a guide sleeve 31 is arranged on the connecting rod 30, the guide sleeve 31 is arranged on a guide post at the upper end of the base 11 in a sliding mode, a lifting screw hole is formed in one end, far away from the mounting block 29, of the connecting rod 30, a lifting screw rod is arranged in the lifting screw hole in a matched mode, the lower end of the lifting screw rod is fixedly connected with the output end of a lifting motor 32, and the height of the rolling roller 25 can be adjusted through thread transmission;
the rolling roller 25 comprises a first roller 38 and a second roller 39 arranged in the inner cavity of the first roller in a sliding manner, a sealing ring is arranged between the second roller 39 and the first roller 38, a liquid storage cavity is formed by the inner cavities of the second roller 39 and the first roller 38, a channel communicated with the liquid storage cavity is arranged inside the rotating roller shaft 26, a rotating sleeve 37 is rotatably arranged at the end part of the rotating roller shaft 26, the port of the rotating sleeve 37 is connected with a water storage tank 35 on the surface of the base 11 through a liquid guide hose 36, and a liquid pump for feeding or pumping liquid in the water storage tank 35 into or out of the liquid storage cavity is arranged inside the water storage tank 35;
when the liquid pump sends liquid into the liquid storage cavity, the second roller 39 slides relative to the first roller 38, so that the rolling width is adjusted, and the adjustment possibility is provided for road surface adjustment with different widths;
the conveying assembly comprises a buffer column 23 for buffering asphalt, the buffer column 23 is fixedly connected with the base 11 through a support rod 34, a fixed material receiving barrel 21 is arranged at the feeding end on the left side of the buffer column 23, a movable material receiving barrel 20 is arranged at the end part of the fixed material receiving barrel 21 in a sliding manner, the movable material receiving barrel 20 corresponds to the discharging position of the stirring assembly, a pushing block is arranged on the outer side of the movable material receiving barrel 20, and the pushing block is connected with a material receiving pushing rod 22 for driving the movable material receiving barrel 20 to slide along the surface of the fixed material receiving barrel 21;
when materials need to be conveyed, the movable material receiving barrel 20 is driven by the material receiving push rod 22 to extend to the discharging position of the stirring assembly, so that the falling materials are received, then the materials enter the cache column 23 along the fixed material receiving barrel 21 and the movable material receiving barrel 20, and a sealing ring matched with the movable material receiving barrel 20 is arranged on the inner wall of the fixed material receiving barrel 21;
a plurality of shunt tubes 24 for guiding asphalt into a tiling assembly are arranged on the right side of the cache column 23, and the multi-point feeding mode can effectively improve the tiling uniformity;
two ends of the cache column 23 are symmetrically provided with a width push rod 33, the output end of the width push rod 33 is connected with a piston push block inside the cache column 23, a chamber for caching asphalt is constructed between the two piston push blocks, and the discharge width can be adjusted by adjusting the distance between the two piston push blocks through the width push rod 33, so that the adjustment can be performed according to pavements with different widths;
the stirring assembly comprises a lifting cylinder 16 coaxially arranged in a stirring barrel 15, a stirring motor 19 is arranged on the upper end face of the lifting cylinder 16, a stirring shaft 18 penetrating through the lifting cylinder 16 is arranged at the output end of the stirring motor 19, stirring blades 17 used for lifting asphalt are distributed on the surface of the stirring shaft 18, a discharge pipe used for returning the asphalt is arranged on the upper right side of the lifting cylinder 16, the outer side of the lifting cylinder 16 is fixedly connected with the inner wall of the stirring barrel 15 through a positioning rod, the lower end of the stirring shaft 18 is connected with a scraping rod 14 tightly attached to the inner wall of the stirring barrel 15, a plurality of stirring rods 13 extending towards the lifting cylinder 16 are distributed on the vertical section of the scraping rod 14, during stirring, the stirring motor 19 drives the stirring shaft 18 to rotate, the stirring shaft 18 drives the stirring blades 17 to rotate, the asphalt flows upwards along the bottom of the lifting cylinder 16 under the driving of the stirring blades 17, and, therefore, circulation stirring of asphalt is realized, the material scraping rod 14 scrapes the inner wall of the stirring barrel 15 under the driving of the stirring shaft 18, the stirring dead angle is eliminated, and meanwhile, the stirring rod 13 can stir the convective asphalt along with the material scraping rod 14.
The working principle of the invention is as follows: during actual use, asphalt is fully stirred by the stirring assembly, the material receiving push rod 22 drives the movable material receiving barrel 20 to extend to the discharging position of the stirring assembly, so that falling materials are received, then the materials enter the cache column 23 along the fixed material receiving barrel 21 and the movable material receiving barrel 20, two ends of the cache column 23 are symmetrically provided with a width push rod 33, the output end of the width push rod 33 is connected with a piston push block inside the cache column 23, a cavity for caching the asphalt is formed between the two piston push blocks, the discharging width can be adjusted by adjusting the distance between the two piston push blocks through the width push rod 33, so that adjustment can be carried out according to pavements with different widths, the right side of the cache column 23 is provided with a plurality of shunt tubes 24 for guiding the asphalt into the tiling assembly, the multi-point feeding mode can effectively improve the tiling uniformity, and liquid is sent into the liquid storage cavity through a liquid pump, the second roller 39 is slid with respect to the first roller 38 to adjust the rolling width so as to lay out pavements of different widths.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The asphalt laying device for the highway construction comprises a base (11) and travelling wheels (12) arranged on the left side and the right side of the base and used for travelling, wherein a stirring barrel (15) used for storing asphalt materials is arranged at the upper end of the base (11), a stirring assembly used for stirring asphalt is arranged inside the stirring barrel (15), a paving assembly used for uniformly paving the asphalt on a road surface is arranged at the right end of the base (11), and a conveying assembly used for conveying the asphalt is arranged between the paving assembly and the stirring barrel (15);
the asphalt mixing machine is characterized in that the conveying assembly comprises a buffer column (23) for buffering asphalt, the buffer column (23) is fixedly connected with the base (11) through a support rod (34), a fixed material receiving barrel (21) is arranged at the feeding end on the left side of the buffer column (23), a movable material receiving barrel (20) is arranged at the end part of the fixed material receiving barrel (21) in a sliding mode, the movable material receiving barrel (20) corresponds to the discharging position of the stirring assembly, a pushing block is arranged on the outer side of the movable material receiving barrel (20), and the pushing block is connected with a material receiving pushing rod (22) which is used for driving the movable material receiving barrel (20) to slide along the surface of the fixed material receiving barrel (21);
the right side of the buffer column (23) is provided with a plurality of shunt tubes (24) for guiding asphalt into the tiling assembly.
2. The asphalt paving device for road construction according to claim 1, wherein the paving component comprises a rolling roller (25), and one end of the rolling roller (25) is fixedly connected with the base (11) through a connecting piece.
3. The asphalt paving device for road construction according to claim 2, wherein the connecting piece comprises a horizontally arranged mounting block (29), a sliding groove hole is formed in the mounting block (29), a buffer slide block (27) is arranged in the sliding groove hole in a matching manner, a rotating roller shaft (26) connected with the end part of the rolling roller (25) is rotatably arranged on the buffer slide block (27), buffer springs (28) connected with the inner wall of the sliding groove hole are arranged at two ends of the buffer slide block (27), and the connecting piece further comprises a height adjusting piece for connecting the mounting block (29) with the base (11).
4. The asphalt paving device for road construction according to claim 3, wherein the height-adjusting member comprises a connecting rod (30) connected with one end of the mounting block (29), a guide sleeve (31) is arranged on the connecting rod (30), the guide sleeve (31) is slidably arranged on a guide post at the upper end of the base (11), a lifting screw hole is arranged at one end of the connecting rod (30) far away from the mounting block (29), a lifting screw rod is arranged in the lifting screw hole in a matching manner, and the lower end of the lifting screw rod is fixedly connected with the output end of the lifting motor (32).
5. The asphalt paving device for road construction according to claim 1, wherein the inner wall of the fixed material receiving cylinder (21) is provided with a sealing ring which is matched with the movable material receiving cylinder (20).
6. The asphalt paving device for road construction according to claim 3, wherein the rolling roller (25) comprises a first roller (38) and a second roller (39) slidably arranged in the inner cavity of the first roller, a sealing ring is arranged between the second roller (39) and the first roller (38), the inner cavities of the second roller (39) and the first roller (38) form a liquid storage cavity, a channel communicated with the liquid storage cavity is arranged inside the rotating roller shaft (26), a rotating sleeve (37) is rotatably arranged at the end part of the rotating roller shaft (26), the port of the rotating sleeve (37) is connected with a water storage tank (35) on the surface of the base (11) through a liquid guide hose (36), and a liquid pump for feeding or extracting liquid in the water storage tank is arranged inside the water storage tank (35).
7. The asphalt paving device for road construction according to claim 6, wherein two ends of the buffer column (23) are symmetrically provided with a width push rod (33), the output end of the width push rod (33) is connected with a piston push block inside the buffer column (23), a buffer asphalt chamber is formed between the two piston push blocks, and the discharge width can be adjusted by adjusting the distance between the two piston push blocks through the width push rod (33), so that the adjustment can be performed according to road surfaces with different widths.
8. Asphalt laying device for road construction according to claim 1, wherein said stirring assembly comprises a lifting drum (16) coaxially arranged inside a stirring barrel (15), a stirring motor (19) is arranged on the upper end surface of the lifting cylinder (16), a stirring shaft (18) penetrating through the lifting cylinder (16) is arranged at the output end of the stirring motor (19), stirring blades (17) used for lifting asphalt are distributed on the surface of the stirring shaft (18), a discharge pipe for returning materials is arranged at the right upper side of the lifting cylinder (16), the outer side of the lifting cylinder (16) is fixedly connected with the inner wall of the stirring barrel (15) through a positioning rod, the lower end of the stirring shaft (18) is connected with a scraping rod (14) which is tightly attached to the inner wall of the stirring barrel (15), and a plurality of stirring rods (13) extending towards the lifting cylinder (16) are distributed on the vertical section of the scraping rod (14).
9. A method for using the asphalt paving device for road construction according to claim 8, wherein the asphalt is fully stirred by the stirring assembly, the movable material receiving barrel (20) is driven by the material receiving push rod (22) to extend to the discharging position of the stirring assembly, so as to receive the falling material, then the material enters the buffer column (23) along the fixed material receiving barrel (21) and the movable material receiving barrel (20), a width push rod (33) is symmetrically arranged at both ends of the buffer column (23), the output end of the width push rod (33) is connected with a piston push block inside the buffer column (23), a chamber for buffering the asphalt is formed between the two piston push blocks, the discharging width can be adjusted by adjusting the distance between the two piston push blocks through the width push rod (33), so that the adjustment can be performed according to road surfaces with different widths, a plurality of shunt tubes (24) for guiding the asphalt into the tiling assembly are arranged at the right side of the buffer column (23), the multi-point feeding mode can effectively improve the tiling uniformity, and liquid is sent into the liquid storage cavity through the liquid pump, so that the second roller (39) and the first roller (38) slide relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626914.0A CN112726343A (en) | 2020-12-30 | 2020-12-30 | Asphalt laying device and method for highway construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626914.0A CN112726343A (en) | 2020-12-30 | 2020-12-30 | Asphalt laying device and method for highway construction |
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| CN112726343A true CN112726343A (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011626914.0A Pending CN112726343A (en) | 2020-12-30 | 2020-12-30 | Asphalt laying device and method for highway construction |
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| CN113774765A (en) * | 2021-11-05 | 2021-12-10 | 辽宁省交通工程有限公司 | Concrete storage device and method for road roller |
| CN114457660A (en) * | 2022-03-10 | 2022-05-10 | 赵永录 | Concrete repairing agent formula and scraping coating equipment thereof |
| CN116988352A (en) * | 2023-09-25 | 2023-11-03 | 河南鼎诚公路养护设备有限公司 | Special equipment for mixing asphalt concrete at normal temperature and spreading in large thickness |
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| CN114457660A (en) * | 2022-03-10 | 2022-05-10 | 赵永录 | Concrete repairing agent formula and scraping coating equipment thereof |
| CN116988352A (en) * | 2023-09-25 | 2023-11-03 | 河南鼎诚公路养护设备有限公司 | Special equipment for mixing asphalt concrete at normal temperature and spreading in large thickness |
| CN116988352B (en) * | 2023-09-25 | 2023-12-15 | 河南鼎诚公路养护设备有限公司 | Special equipment for mixing asphalt concrete at normal temperature and spreading in large thickness |
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Application publication date: 20210430 |