CN112064475A - Quick leveling device for asphalt highway pavement - Google Patents
Quick leveling device for asphalt highway pavement Download PDFInfo
- Publication number
- CN112064475A CN112064475A CN202010890504.0A CN202010890504A CN112064475A CN 112064475 A CN112064475 A CN 112064475A CN 202010890504 A CN202010890504 A CN 202010890504A CN 112064475 A CN112064475 A CN 112064475A
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- China
- Prior art keywords
- gear
- reciprocating mechanism
- sliding sleeve
- base
- fixedly connected
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- 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.)
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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
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
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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
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
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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
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
- E01C23/122—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus
Abstract
The invention relates to a quick leveling device for an asphalt highway pavement, which comprises a rack, and a leveling device, an asphalt feeding device, a leveling device and an asphalt pavement heating device which are sequentially arranged on the rack from left to right; the asphalt pavement heating device comprises a reciprocating mechanism rail base fixedly connected with the rack, a reciprocating mechanism, a magnifying glass, an oil cylinder and an upper guide rail, wherein the lower end face of the reciprocating mechanism rail base is in sliding connection with the reciprocating mechanism base, the magnifying glass is hinged with the reciprocating mechanism, one end of the oil cylinder is fixedly connected with the reciprocating mechanism, and the upper guide rail is arranged on the reciprocating mechanism base. The invention has the advantages that the magnifying glass arranged on the reciprocating mechanism can uniformly heat the old asphalt pavement by using solar energy, so that the newly added asphalt and the old asphalt are well combined together, and the pavement is flattened by using the compacting device, thereby achieving the purpose of quickly flattening the pavement.
Description
Technical Field
The invention belongs to the technical field of road construction, and particularly relates to a rapid leveling device for an asphalt highway pavement.
Background
Roads are infrastructures for various vehicles and pedestrians to pass through, and are divided into various grades according to different use conditions and different road surface construction degrees, wherein expressways are the highest grades among various highways, and the expressways are usually paved by asphalt and have higher flatness, so that the vehicles running on the expressways can reach higher speed. However, no matter what kind of road surface is used for a long time, the surface of the road surface is inevitably uneven, and the road surface needs to be leveled at the moment; traditional bituminous paving need break up the road surface earlier and carry away the pitch waste material, levels again to every process all needs solitary equipment to go to carry out, and the repair process is comparatively loaded down with trivial details, and the time limit for a project is longer, influences the normal use of road, and repair cost is comparatively high, makes whole road surface maintenance expense comparatively high.
Disclosure of Invention
The invention aims to provide a quick leveling device for an asphalt highway pavement, which can conveniently and quickly finish the pavement.
In order to solve the above problems, the present invention adopts the following technical solutions.
A rapid leveling device for an asphalt highway pavement comprises a rack, and a leveling device, an asphalt feeding device, a leveling device and an asphalt pavement heating device which are sequentially arranged on the rack from left to right;
the asphalt pavement heating device comprises a reciprocating mechanism rail base fixedly connected with the rack, a reciprocating mechanism of which the lower end surface is in sliding connection with the reciprocating mechanism base, a magnifying lens hinged with the reciprocating mechanism, an oil cylinder of which one end is hinged with the reciprocating mechanism and an upper guide rail arranged on the reciprocating mechanism base;
an oil cylinder rod at the other end of the oil cylinder is hinged with the side face of the magnifying lens;
the reciprocating mechanism comprises a magnifying glass base which is in sliding connection with the reciprocating mechanism base, a gear sliding sleeve frame which is fixedly connected with the side face of the magnifying glass base, a gear sliding sleeve which is in sliding connection with the gear sliding sleeve frame, a guide pillar which is fixedly connected with the gear sliding sleeve and is in sliding connection with the gear sliding sleeve frame, a guide shaft which is connected with the guide pillar, a gear which is meshed with the gear sliding sleeve and a motor which provides power for the gear;
the gear sliding sleeve frame is of a hollow structure, and the side surface of the gear sliding sleeve frame is fixedly connected with the base of the magnifier;
the gear sliding sleeve is of a hollow structure, the hollow structure is a structure formed by connecting two semicircles with a middle rectangle, a continuous inner gear ring is arranged on the inner surface of the gear sliding sleeve, and the inner gear ring is meshed with the gear;
the guide shaft is connected with the upper guide rail in a sliding manner;
the lower part of the magnifier is hinged with the middle part of the upper surface of the magnifier base; the oil cylinder is fixedly connected with the left side of the upper surface of the magnifying lens base;
the motor is fixedly connected with the reciprocating mechanism base; and an output shaft of the motor is fixedly connected with the gear.
The guide shaft comprises a bearing arranged in the guide post and a roller fixedly connected with the inner ring of the bearing; the roller is connected with the upper guide rail in a rolling way.
The upper surface of the base of the reciprocating mechanism is provided with a dovetail-shaped guide rail, and the dovetail-shaped guide rail is connected with the base of the magnifying lens in a sliding mode.
The diameter of the gear root circle is d, the distance between tooth tops of two sides in the gear sliding sleeve is s1, the length of the upper guide rail is s, and s1-d is obtained.
The distance between the upper side of the outer surface of the gear sliding sleeve and the highest position of the excircle of the roller is L1, the distance between the upper side of the inner surface of the gear sliding sleeve frame and the upper surface of the upper guide rail is L2, the outer diameter of the roller is d2, and d2+ L2 is L1.
The leveling device comprises a leveling motor arranged on the rack and a cutter fixedly connected with an output shaft of the leveling motor.
The cutter is made of hard alloy.
The frame is provided with wheels.
The invention has the beneficial effects that:
1. the leveling device can remove the overhigh part of the asphalt pavement, so that the pavement is more smooth. And a foundation is laid for the next working procedure. Through the bituminous paving heating device who sets up, can soften bituminous paving, the road surface of being convenient for makes level to the road surface that softens combines with new pitch more easily, guarantees construction quality. Through the magnifying glass, the magnifying glass refraction principle is utilized, sunlight is utilized, the asphalt pavement is heated, energy is saved, and the effects of saving energy and reducing consumption are achieved. Through the oil cylinder that sets up, can adjust the angle of magnifying glass, receive the solar light source better, the heat of the sun of multi-angle utilization. The reciprocating mechanism can move the magnifier back and forth at a uniform speed to avoid heating a certain point for a long time, so that the heating is uneven, and the heated part is more uniform. Through the asphalt feeding device, new materials can be added to the pavement, so that the development of the pavement compaction process behind is facilitated. Through the road surface compaction device who sets up, can be with the compaction of the pitch of newly adding and level road surface, reached the effect of level road surface. Through the design that guide shaft and last guide rail are rolling contact, avoided sliding contact to cause frictional resistance big, the fast shortcoming of wearing and tearing has played the increase life-span, reduces the beneficial effect of maintenance. Through the dovetail-shaped guide rail arranged on the upper surface of the base of the reciprocating mechanism, the base of the magnifier can be more stable in the sliding process. The cutter is made of hard alloy materials, and the hard alloy has the advantages of high hardness, wear resistance, long service life and the like, so that the cutter is prevented from being worn too fast and is replaced frequently.
2. According to the magnifying glass, the gear at the fixed position rotates to drive the gear sliding sleeve which can move up and down and slide left and right in the gear sliding sleeve frame, so that the magnifying glass can linearly move left and right. The wheel through frame lower part setting can be with this device along the light removal in road surface, avoids setting to the inconvenient use of fixing device.
Drawings
FIG. 1 is a front view of the present invention in a schematic configuration;
FIG. 2 is a right side elevational view of the present invention in a structural schematic;
FIG. 3 is a schematic view of the construction of an asphalt pavement heating apparatus;
FIG. 4 is an enlarged partial sectional view taken at A of FIG. 3;
FIG. 5 is an enlarged partial sectional view taken at B of FIG. 3;
FIG. 6 is a schematic structural view of a reciprocating mechanism;
FIG. 7 is a schematic view of the reciprocating mechanism when the roller is at the left most side of the upper track;
FIG. 8 is a schematic view of the reciprocating mechanism when the rollers are located at the middle position of the upper side of the upper rail;
FIG. 9 is a schematic view of the reciprocating mechanism when the roller is at the rightmost side of the upper track;
FIG. 10 is an enlarged view of a portion of FIG. 6 at C;
FIG. 11 is a schematic view of a gear configuration;
fig. 12 is a structural schematic view of the gear sliding sleeve.
The reference numbers in the figures illustrate:
1-a frame, 2-a flattening device, 3-an asphalt feeding device, 4-a leveling device, 40-a leveling motor, 41-a cutter and 5-an asphalt pavement heating device;
50-reciprocating mechanism base, 51-magnifier, 52-oil cylinder, 53-reciprocating mechanism, 54-upper guide rail;
530-a magnifier base, 531-a gear sliding sleeve frame, 532-a gear sliding sleeve, 533-a guide post, 534-a guide shaft, 535-a gear and 536-a motor;
5340 bearings, 5341 rollers.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
Examples
As shown in fig. 1-12, a device for quickly leveling an asphalt road surface comprises a frame 1, and a leveling device 2, an asphalt feeding device 3, a leveling device 4, and an asphalt road surface heating device 5, which are sequentially arranged on the frame 1 from left to right;
the asphalt pavement heating device 5 comprises a reciprocating mechanism rail base 50 fixedly connected with the rack 1, a reciprocating mechanism 53 with the lower end surface slidably connected with the reciprocating mechanism base 50, a magnifying lens 51 hinged with the reciprocating mechanism 53, an oil cylinder 52 with one end hinged with the reciprocating mechanism 53 and an upper guide rail 54 arranged on the rack 1;
an oil cylinder rod at the other end of the oil cylinder 52 is hinged with the side surface of the magnifying lens 51;
the reciprocating mechanism 53 comprises a magnifying glass base 530 slidably connected with the reciprocating mechanism base 50, a gear sliding sleeve frame 531 fixedly connected with the side of the magnifying glass base 530, a gear sliding sleeve 532 slidably connected with the gear sliding sleeve frame 531, a guide post 533 fixedly connected with the gear sliding sleeve 532 and slidably connected with the gear sliding sleeve frame 531, a guide shaft 534 fixedly connected with the guide post 533, a gear 535 engaged with the gear sliding sleeve 532, and a motor 536 for providing power for the gear 535;
the gear sliding sleeve frame 531 is of a hollow structure, the hollow structure is rectangular, the side surface of the gear sliding sleeve frame 531 is fixedly connected with the magnifier base 530, and a through hole is arranged on the upper frame of the gear sliding sleeve frame 531 and is connected with the guide post 533 in a sliding manner;
the gear sliding sleeve 532 is of a hollow structure, the hollow structure is a structure that two semicircular ends are connected with a middle rectangle, a continuous inner gear ring is arranged on the inner surface of the gear sliding sleeve 532, and the inner gear ring is meshed with the gear 535;
the guide shaft 534 is in rolling connection with the upper guide rail 54;
the lower part of the magnifier 51 is hinged with the middle part of the upper surface of the magnifier base 530; the oil cylinder 52 is fixedly connected with the left side of the upper surface of the magnifying lens base 530;
the motor 536 is fixedly connected with the reciprocating mechanism base 50; the output shaft of the motor 536 is fixedly connected to the gear 535.
The guide shaft 534 comprises a bearing 5340 arranged in the guide post 533 and a roller 5341 fixedly connected with the inner ring of the bearing 5340; the outer ring of the bearing 5340 is fixedly connected with the guide post 533; the rollers 5341 are in rolling contact with the upper rail 54.
The upper surface of the reciprocating mechanism base 50 is provided with a dovetail-shaped guide rail, and the dovetail-shaped guide rail is connected with the magnifying lens base 530 in a sliding manner.
The diameter of the root circle of the gear 535 is d, the distance between the tooth tops of two sides inside the gear sliding sleeve 532 is s1, and the length s of the upper guide rail 54 is s 1-d.
The distance between the upper side of the outer surface of the gear sliding sleeve 532 and the highest position of the outer circle of the roller 5341 is L1, the distance between the upper side of the inner surface of the gear sliding sleeve frame 531 and the upper surface of the upper guide rail 54 is L2, the outer part of the roller 5341 is d2, and the sum of d2 and L2 is L1.
The leveling device 4 comprises a leveling motor 40 arranged on the machine frame 1 and a cutter 41 fixedly connected with an output shaft of the leveling motor 40.
The cutter 41 is made of hard alloy.
The frame 1 is provided with wheels.
The working process of the device is as follows:
starting the motor 536, rotating the gear 535 to drive the gear sliding sleeve 532 to slide up and down in the gear sliding sleeve frame 531, so that the magnifier base 530 reciprocates left and right;
as shown in fig. 6, assuming that the motor 536 rotates clockwise, when the upper rack of the gear sliding sleeve 532 is meshed with the gear 535, the gear sliding sleeve 532 slides leftward, the gear sliding sleeve 532 drives the gear sliding sleeve frame 531, and since the gear sliding sleeve frame 531 is fixed to the magnifier base 530, the magnifier base 530 is further driven to move leftward along the dovetail-shaped guide rail, and the rollers 5341 roll along the bottom surface of the upper guide rail 54;
as shown in fig. 7, when the gear 535 drives the sliding gear sleeve 532 to move leftward until the semicircular rack on the right side of the sliding gear sleeve 532 is engaged with the gear 535, the sliding gear sleeve 532 moves upward along the sliding gear sleeve frame 531, and at this time, the roller 5341 moves toward the upper surface of the upper guide rail 54 along the circular left end surface of the upper guide rail 54;
as shown in fig. 8, when the lower rack of the gear sliding sleeve 532 is meshed with the gear 535, the roller 5341 moves to the upper surface of the upper guide rail 54, the weight of the gear sliding sleeve 532 is borne by the upper guide rail 54, at this time, the gear 535 drives the gear sliding sleeve 532 to move linearly to the right, the gear sliding sleeve 532 drives the gear sliding sleeve frame 531 to move to the right, and then the gear sliding sleeve frame 531 drives the magnifying lens base 530 to move to the right along the dovetail guide rail, at this time, the roller 5341 moves along the upper surface of the upper guide rail 54;
as shown in fig. 9, when the sliding gear sleeve 532 moves rightwards until the semicircular rack on the left side of the sliding gear sleeve 532 is engaged with the gear 535, the sliding gear sleeve 532 moves downwards along the sliding gear sleeve frame 531, and at this time, the roller 5341 moves towards the lower surface of the upper guide rail 54 along the circular right end surface of the upper guide rail 54;
as a result, the magnifier base 530 may move linearly along the dovetail guide.
After the magnifying glass 51 uniformly heats the asphalt pavement to be repaired, the leveling motor 40 is started, the cutter 41 arranged on the output shaft of the leveling motor 40 crushes the protruded asphalt pavement, the asphalt feeding device 3 sends new asphalt materials to the ground, the asphalt materials are flattened by the flattening device 2, and the device finishes the work.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (9)
1. The utility model provides a quick level and smooth device on bituminous highway road surface which characterized in that: comprises a frame (1), and a flattening device (2), an asphalt feeding device (3), a flattening device (4) and an asphalt pavement heating device (5) which are arranged on the frame (1);
the asphalt pavement heating device (5) comprises a reciprocating mechanism base (50) fixedly connected with the rack (1), a reciprocating mechanism (53) with the lower end surface slidably connected with the reciprocating mechanism base (50), a magnifying glass (51) hinged with the reciprocating mechanism (53), an oil cylinder (52) with one end hinged with the reciprocating mechanism (53) and an upper guide rail (54) arranged on the reciprocating mechanism base (50); the oil cylinder rod of the oil cylinder (52) is hinged with the side surface of the magnifying lens (51).
2. The device for quickly flattening the asphalt road surface according to claim 1, characterized in that: the reciprocating mechanism (53) comprises a magnifying glass base (530) in sliding connection with the reciprocating mechanism base (50), a gear sliding sleeve frame (531) fixedly connected with the side surface of the magnifying glass base (530), a gear sliding sleeve (532) in sliding connection with the gear sliding sleeve frame (531), a guide post (533) fixedly connected with the gear sliding sleeve (532) and in sliding connection with the gear sliding sleeve frame (531), a guide shaft (534) connected with the guide post (533), a gear (535) and a motor (536) for providing power for the gear (535);
the gear sliding sleeve frame (531) is of a hollow structure, and the side surface of the gear sliding sleeve frame is fixedly connected with the magnifier base (530);
the gear sliding sleeve (532) is of a hollow structure, the shape of the hollow structure is that two semicircular ends are connected with a middle rectangle, a continuous inner gear ring is arranged on the inner surface of the gear sliding sleeve (532), and the inner gear ring is meshed with the gear (535);
the guide shaft (534) is in rolling connection with the upper guide rail (54);
the lower part of the magnifier (51) is hinged with the middle part of the upper surface of the magnifier base (530); the oil cylinder (52) is hinged with the left side of the upper surface of the magnifier base (530);
the motor (536) is fixedly connected with the reciprocating mechanism base (50); the output shaft of the motor (536) is fixedly connected with the gear (535).
3. The device for quickly flattening the asphalt road surface according to claim 2, characterized in that: the guide shaft (534) comprises a bearing (5340) arranged in the guide post (533) and a roller (5341) fixedly connected with an inner ring of the bearing (5340); the outer ring of the bearing (5340) is fixedly connected with the guide post (533); the rollers (5341) are connected with the upper guide rail (54) in a rolling manner.
4. The device for quickly flattening the asphalt road surface according to claim 2, characterized in that: the upper surface of the reciprocating mechanism base (50) is provided with a dovetail-shaped guide rail, and the dovetail-shaped guide rail is connected with the magnifier base (530) in a sliding manner.
5. The device for quickly flattening the asphalt road surface according to claim 2, characterized in that: the diameter of a dedendum circle of the gear (535) is d, the distance between addendums on two sides inside the gear sliding sleeve (532) is s1, and the length of the upper guide rail (54) is s, wherein s is s 1-d.
6. The device for quickly flattening the asphalt road surface according to claim 1, characterized in that: the leveling device (4) comprises a leveling motor (40) arranged on the rack (1) and a cutter (41) fixedly connected with an output shaft of the leveling motor (40).
7. The device for quickly flattening the asphalt road surface according to claim 6, characterized in that: the cutter (41) is made of hard alloy.
8. The device for quickly flattening the asphalt road surface according to claim 1, characterized in that: wheels are installed on the machine frame (1).
9. The device for quickly flattening the asphalt road surface according to claim 3, characterized in that: the distance between the upper side of the outer surface of the gear sliding sleeve (532) and the highest position of the outer circle of the roller (5341) is L1, the distance between the upper side of the inner surface of the gear sliding sleeve frame (531) and the upper surface of the upper guide rail 54 is L2, the outer diameter of the roller (5341) is d2, and d2+ L2 is L1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010890504.0A CN112064475A (en) | 2020-08-29 | 2020-08-29 | Quick leveling device for asphalt highway pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010890504.0A CN112064475A (en) | 2020-08-29 | 2020-08-29 | Quick leveling device for asphalt highway pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112064475A true CN112064475A (en) | 2020-12-11 |
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ID=73659184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010890504.0A Pending CN112064475A (en) | 2020-08-29 | 2020-08-29 | Quick leveling device for asphalt highway pavement |
Country Status (1)
| Country | Link |
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| CN (1) | CN112064475A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105128A (en) * | 1985-07-03 | 1987-03-04 | 湖北省鄂州市公路段 | Solar energy autotrack heating unit of asphalt |
| US6227762B1 (en) * | 1998-09-03 | 2001-05-08 | Wesley Van Velsor | Paving apparatus and method |
| CN201217773Y (en) * | 2008-06-16 | 2009-04-08 | 郑卫东 | Movable solar energy concentration heater box for asphalt highroad surface |
| CN204868296U (en) * | 2015-08-14 | 2015-12-16 | 温岭市五龙机械有限公司 | Geared feed structure |
| CN106087684A (en) * | 2016-06-02 | 2016-11-09 | 潍坊学院 | A kind of road repair method and apparatus |
| CN209366975U (en) * | 2018-10-20 | 2019-09-10 | 山东阳光沥青有限公司 | A kind of pitch oil unloading trough |
-
2020
- 2020-08-29 CN CN202010890504.0A patent/CN112064475A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105128A (en) * | 1985-07-03 | 1987-03-04 | 湖北省鄂州市公路段 | Solar energy autotrack heating unit of asphalt |
| US6227762B1 (en) * | 1998-09-03 | 2001-05-08 | Wesley Van Velsor | Paving apparatus and method |
| CN201217773Y (en) * | 2008-06-16 | 2009-04-08 | 郑卫东 | Movable solar energy concentration heater box for asphalt highroad surface |
| CN204868296U (en) * | 2015-08-14 | 2015-12-16 | 温岭市五龙机械有限公司 | Geared feed structure |
| CN106087684A (en) * | 2016-06-02 | 2016-11-09 | 潍坊学院 | A kind of road repair method and apparatus |
| CN209366975U (en) * | 2018-10-20 | 2019-09-10 | 山东阳光沥青有限公司 | A kind of pitch oil unloading trough |
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Application publication date: 20201211 |
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| RJ01 | Rejection of invention patent application after publication |