阅读说明：本技术 沥青混凝土道路面层自动精准控制高程摊铺方法及系统 (Automatic and accurate elevation control paving method and system for asphalt concrete road surface layer ) 是由 蔡智聪 戴科亮 方壮强 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种沥青混凝土道路面层自动控制高程摊铺方法及系统,通过在摊铺机的料斗内设置活动板、在活动板上滑动连接有刮条,活动板将料斗内壁依附的沥青混合物刮下,刮条将活动板上依附的沥青混凝土刮下,被刮下的沥青混凝土一并被活动板推送至刮板输送器上,从而使得料斗内不会产生固结物料,不仅有利于提高沥青混凝土摊铺的平整度,还有利于减少物料浪费。(The invention discloses an automatic elevation control paving method and system for an asphalt concrete pavement, wherein a movable plate is arranged in a hopper of a paver, a scraping strip is connected on the movable plate in a sliding manner, the movable plate scrapes off asphalt mixture attached to the inner wall of the hopper, the scraping strip scrapes off the asphalt concrete attached to the movable plate, and the scraped asphalt concrete is pushed to a scraper conveyor by the movable plate, so that solidified materials cannot be generated in the hopper, the automatic elevation control paving method and system for the asphalt concrete pavement are beneficial to improving the paving flatness of the asphalt concrete pavement and reducing material waste.)

1. The utility model provides an automatic accurate control elevation system that paves of asphalt concrete road surface layer which characterized in that: comprises a GPS reference station, a laser elevation reference station, a GPS mobile station and a paver, wherein the paver comprises a frame (1), a scraper conveyor (2) arranged on the frame (1) and two hoppers (5), the two hoppers (5) are respectively positioned at two sides of the conveying direction of the scraper conveyor (2), the hopper (5) is arranged close to an opening at one side of the scraper conveyor (2), a movable plate (13) is arranged in the hopper (5), the movable plate (13) is in sliding contact with a pair of inner side walls and an inner bottom wall which are opposite to the hopper (5), a driving piece for driving the movable plate (13) to move is arranged outside the hopper (5), one side of the movable plate (13) close to the scraper conveyor (2) is connected with a scraping strip (15) in a sliding way, and a linkage mechanism (16) which is used for synchronously moving the associated movable plate (13) and the scraping strip (15) is arranged in the hopper (5).

2. The automatic precise control elevation paving system of an asphalt concrete pavement layer according to claim 1, characterized in that: the linkage mechanism (16) comprises a screw rod (161) and a guide rod (162) which are arranged on two sides of the movable plate (13) in the length direction, the screw rod (161) and the guide rod (162) are arranged in parallel, the screw rod (161) and the guide rod (162) penetrate through the scraping strip (15), the scraping strip (15) is in threaded connection with the screw rod (161), and the scraping strip (15) is in sliding connection with the guide rod (162); the hopper (5) is close to the upper end fixedly connected with rack (165) of one side of screw rod (161), the upper end fixedly connected with of screw rod (161) and rack (165) meshing driven gear (166).

3. The automatic precise control elevation paving system of an asphalt concrete pavement layer according to claim 1, characterized in that: one end of the hopper (5) close to the scraper conveyor (2) is hinged with the rack (1), and the rack (1) is provided with a power part for driving the hopper (5) to rotate.

4. The automatic precise control elevation paving system of an asphalt concrete pavement layer according to claim 3, wherein: be provided with baffle (10) on frame (1) and mount table (4) that supply driver's cabin (3) to install, two hopper (5) set up between baffle (10) and mount table (4), hopper (5) and baffle (10), mount table (4) rotate the butt, one side that hopper (5) are close to mount table (4) is provided with first subassembly of striking off, first subassembly of striking off is used for striking off adnexed asphalt concrete on mount table (4), one side that hopper (5) are close to mount table (4) is provided with the second and strikes off the subassembly, the second strikes off the subassembly and is used for striking off adnexed asphalt concrete on baffle (10).

5. The automatic precise control elevation paving system of an asphalt concrete pavement layer according to claim 4, wherein: first structure of scraping off the subassembly with the second is unanimous, first structure of scraping off the subassembly includes connecting strip (11) and swing strip (12), the one end and the articulated setting of hopper (5) of connecting strip (11), the other end of connecting strip (11) and the articulated setting of side of swing strip (12), the one end and the mount table (4) of swing strip (12) are close to the articulated setting in one side of hopper (5), the pin joint of swing strip (12) and mount table (4) is located the upper end at mount table (4) middle part, works as when hopper (5) are kept flat, the free end of swing strip (12) and the lower extreme butt of hopper (5).

6. The automatic precise control elevation paving system of an asphalt concrete pavement layer according to claim 2, characterized in that: two corners of hopper (5) all set up baffle (17), two baffle (17) and hopper (5) form two cavitys, and wherein the cavity is used for holding screw rod (161), and another cavity is used for holding guide bar (162).

7. The automatic precise control elevation paving system of an asphalt concrete pavement layer according to claim 6, wherein: the partition plate (17) and the hopper (5) are arranged in a sliding insertion mode, and a slot (18) for the partition plate (17) to pass through is formed in the side wall of the hopper (5).

8. An automatic and accurate elevation control paving method for an asphalt concrete road surface layer is characterized by comprising the following steps of: the method comprises the following steps:

s1, before paving, quality inspection and acceptance are carried out on the lower bearing layer of the road, and the road can be paved after the quality is qualified;

s2, inputting the design parameters provided by the design institute into an automatic control system of the paver;

s3, establishing a GPS reference station and a laser elevation reference station at a control point, and configuring the number of laser transmitters according to the working distance of the laser transmitters;

s4, paving, wherein asphalt concrete in the hopper (5) is conveyed to a spiral paving chamber under the action of a scraper conveyor (2), the asphalt concrete in the spiral paving chamber is uniformly distributed and paved on a road under the action of a spiral paver (7), during the period, a GPS reference station and a laser elevation reference station transmit GPS differential signals and laser elevation information to a control system on the paver to be processed and compared to generate corresponding elevation correction information, and a hydraulic oil cylinder on a traction arm drives an ironing plate (8) to adjust the direction, so that the pavement evenness and thickness are changed; meanwhile, the GPS mobile station monitors the paving condition in real time, and observes whether the paving effect meets the requirement of paving design, thereby facilitating the realization of automatic paving correction in the paving process;

s5, cleaning residual asphalt concrete in the hopper (5) at regular time, specifically:

s51, a control system of the paver starts a power part to drive the hopper (5) to rotate towards the direction close to the scraper conveyor (2), the connecting rod drives the swinging strip (12) to rotate in the process of moving along with the hopper (5), and the hopper (5) and the swinging strip (12) scrape off asphalt concrete attached to the mounting table (4) and the baffle (10) in the rotating process;

s52, controlling the partition board (17) to move by the control system of the paver, wherein the asphalt concrete attached to the surface of the partition board (17) is scraped by the hopper (5) in the process that the partition board (17) moves relative to the hopper (5);

s53, the control system of the paver drives the movable plate (13) to move through the driving part, the movable plate (13) scrapes off asphalt concrete attached to the inner wall of the hopper (5) and pushes the asphalt concrete to the scraper conveyor (2) in the moving process, meanwhile, the gear (166) rotates and moves relative to the rack (165) to rotate, so that the screw rod (161) is driven to rotate, the scraper bar (15) is driven to move, and the asphalt concrete attached to the movable plate (13) is hung down by the scraper bar (15) and pushed to the scraper conveyor (2) by the movable plate (13);

s6, compacting the pavement by using a road roller after the asphalt concrete is paved;

and S7, detecting various parameters of the molded pavement, and checking and accepting after the detection is qualified.

Technical Field

The invention relates to the technical field of road construction, in particular to an automatic and accurate elevation control paving method and system for an asphalt concrete road surface layer.

Background

In the process of asphalt concrete pavement construction, an automatic paver is generally used for paving asphalt concrete roads, and generally comprises a frame, a power device, a traveling device, a hopper, a scraper conveyor, a spiral paver, a traction arm, a compaction device, an ironing device (comprising an ironing plate, a thickness regulator, an arch degree regulator, a heating device and the like) and other parts.

The working principle is as follows: the asphalt concrete is poured into the hopper by the discharging car and is conveyed to the spiral paving chamber under the action of the scraper conveyor. The spiral spreader has a left spiral and a right spiral, and simultaneously spreads the materials uniformly to the left and the right sides, but can also be driven independently from the left and the right. Along with the forward movement of the paver, the compaction device and the ironing device carry out preliminary compaction and leveling on the paving layer according to certain width, thickness and camber. Because the screed plate has the floating characteristic, the elevation angle of the bottom surface of the screed plate relative to the ground can be changed through the thickness adjuster, so that the thickness of the paving layer can be adjusted.

The traditional asphalt paving operation mode is that steel hinge lines are arranged on two sides of a construction road according to a road paving design elevation to serve as reference lines, a sensor is arranged on the artificially straightened steel hinge lines, and the control of the asphalt concrete paving thickness is achieved by calculating the height of the reference lines from the ground. That is to say, asphalt concrete paves thickness and receives the influence of datum line straightness completely, when the datum line appears flagging or when the benchmark that artificially leads to sets for the mistake, appears wavy road surface easily, reworks the difficulty to waste a large amount of manpower and materials.

With the development of scientific technology, the traditional operation mode is gradually replaced by adopting a real-time automatic elevation control paving technology. The system mainly comprises a GPS reference station, a laser elevation reference station, a GPS mobile station and an automatic control system of the paver.

Before paving operation is carried out, data of design parameters such as gradient, superelevation and curve elements and the like provided by a design institute are input into an automatic control system of the paving machine, then a GPS reference station and a laser elevation reference station are arranged on control points, and the number of laser transmitters is configured according to the operation distance of the laser transmitters. During operation, the GPS reference station and the laser elevation reference station transmit GPS differential signals and laser elevation information to an automatic control system of the paver for processing and comparison to generate corresponding elevation correction information, and a hydraulic oil cylinder on a traction arm drives a screed plate to adjust the direction, so that the pavement evenness and thickness are changed. Meanwhile, the GPS mobile station monitors the paving condition in real time, and observes whether the paving effect meets the requirement of paving design, so that the automatic paving correction is realized in the paving process, and the paving quality is improved.

However, in actual work progress, no matter which mode is adopted to carry out the asphalt paving, asphalt concrete in the hopper increases along with the depositing time, and the temperature can descend to make asphalt concrete's mobility reduce, the stickness increase, lead to partial asphalt concrete to glue in the hopper bottom, thereby produce the stagnant material that is difficult for clearing up, asphalt stagnant material sneaks into the asphalt concrete that normally paves in, causes the screw paver cloth uneven easily, thereby influences the paving quality.

Disclosure of Invention

In order to realize automatic correction control of the paving elevation, the application provides an automatic and accurate elevation control paving method and system for an asphalt concrete road surface layer.

The application provides an automatic accurate control elevation paving method and system for an asphalt concrete pavement layer, which adopts the following technical scheme:

the utility model provides an automatic accurate control elevation paving system of asphalt concrete road surface layer, includes GPS reference station, laser elevation reference station, GPS mobile station and paver, the paver includes the frame, sets up scraper conveyor and two hoppers in the frame, two the hopper is located scraper conveyor direction of delivery's both sides respectively, the hopper is close to one side opening setting of scraper conveyor, a pair of inside wall and interior diapire slip butt that the fly leaf is relative with the hopper, the outside of hopper is provided with the driving piece that orders about the fly leaf removal, one side sliding connection that the fly leaf is close to the scraper conveyor has the scraper bar, be provided with associated fly leaf and scraper bar synchronous movement's link gear in the hopper.

By adopting the technical scheme, when paving operation is carried out, the GPS reference station and the laser elevation reference station transmit the GPS differential signal and the laser elevation information to the automatic control system of the paver for processing and comparison to generate corresponding elevation correction information, and the hydraulic oil cylinder on the traction arm drives the screed to adjust the direction, so that the change of the pavement evenness and thickness is realized. Meanwhile, the GPS mobile station monitors the paving condition in real time, and observes whether the paving effect meets the requirement of paving design, so that the automatic paving correction is realized in the paving process, and the paving quality is improved. After the material in the hopper is arranged to the greatest extent, the driving piece orders about the fly leaf and removes, and the fly leaf will depend on the asphalt concrete on hopper inside wall, interior diapire at the removal in-process and scrape and propelling movement to scraper conveyor on, simultaneously, scrape the strip and remove at link gear's mutual fly leaf to the asphalt concrete who will depend on the fly leaf scrapes, not only saves the material, makes hopper and fly leaf all can not produce the consolidation material moreover, thereby is favorable to improving the roughness that the pitch paved. Meanwhile, the hopper is convenient to clean subsequently.

Preferably, the linkage mechanism comprises a screw rod and a guide rod which are arranged on two sides of the movable plate in the length direction, the screw rod and the guide rod are arranged in parallel, the screw rod and the guide rod both penetrate through the scraping strip, the scraping strip is in threaded connection with the screw rod, and the scraping strip is in sliding connection with the guide rod; the upper end of one side of the hopper close to the screw rod is fixedly connected with a rack, and the upper end of the screw rod is fixedly connected with a gear which is in meshing transmission with the rack.

Through adopting above-mentioned technical scheme, when the fly leaf removed, thereby the relative rack of gear removed and takes place to rotate, and gear revolve drives the screw rod and rotates, and the guide bar restriction is scraped the strip and is followed the screw rod and rotate to make and scrape the strip and remove along the length direction of screw rod, and then will depend on the asphalt concrete on the fly leaf and scrape down.

Preferably, one end of the hopper close to the scraper conveyor is hinged with the rack, and the rack is provided with a power part for driving the hopper to rotate.

Through adopting above-mentioned technical scheme, power spare orders about the hopper and removes towards the direction that is close to scraper conveyor to make the pitch material that is located the hopper bottom can drop on scraper conveyor smoothly, when making things convenient for the material loading, reduce the material extravagant.

Preferably, be provided with the mount table of baffle and confession driver's cabin installation in the frame, two the hopper sets up between baffle and mount table, the hopper rotates the butt with baffle, mount table, one side that the hopper is close to the mount table is provided with first scraping the subassembly, the second is scraped the subassembly and is used for scraping adnexed asphalt concrete on the mount table, one side that the hopper is close to the mount table is provided with the second and is scraped the subassembly, the second is scraped the subassembly and is used for scraping adnexed asphalt concrete on the baffle.

Through adopting above-mentioned technical scheme, mount table and baffle shelter from the clearance between two hopper both ends respectively to make mount table and baffle all can be infected with asphalt concrete. Two hoppers scrape some asphalt concrete attached to the mounting table and the scraper blade in the process of rotating towards opposite directions, but can abut against each other in the two hoppers, so that dead angles exist, therefore, the assembly is scraped through setting up the first scraping assembly and the second scraping assembly, the first scraping assembly and the second scraping assembly rotate in the process of following the hoppers, scrape residual asphalt concrete on the mounting table and the baffle plate, so that solidification materials can not be generated on the mounting table and the baffle plate, and the improvement of the flatness of asphalt paving is facilitated. Meanwhile, the material is saved.

Preferably, first structure of scraping the subassembly with the second is scraped unanimously, first subassembly of scraping includes connecting strip and swing strip, the one end and the articulated setting of hopper of connecting strip, the other end of connecting strip and the articulated setting of side of swing strip, the one end of swing strip and the articulated setting of one side that the mount table is close to the hopper, the pin joint of swing strip and mount table is located the upper end at mount table middle part, works as when the hopper is kept flat, the free end of swing strip and the lower extreme butt of hopper.

Through adopting above-mentioned technical scheme, when the hopper rotated towards the direction that is close to scraper conveyor, the connecting strip followed the hopper operation and drove the swing strip and rotated, and the swing strip is in the rotation in-process with the regional cover that the hopper did not cover to make mount table and baffle keep clean and tidy, so that mount table and baffle can not produce the consolidation material.

Preferably, two partition plates are arranged at two corners of the hopper, two partition plates and the hopper form two cavities, wherein the cavities are used for accommodating the screw rods, and the other cavity is used for accommodating the guide rods.

Through adopting above-mentioned technical scheme, the baffle plays the guard action to screw rod and guide bar to make asphalt concrete can not glue on screw rod and baffle, so that the scraping strip keeps smoothly at the removal in-process.

Preferably, one side of the hopper, which is far away from the scraper conveyor, and the movable plate are provided with through slots, and the partition plate is in sliding insertion connection with the slots.

Through adopting above-mentioned technical scheme, conveniently open and shut the baffle to the doctor-bar removes.

An automatic and accurate elevation control paving method for an asphalt concrete pavement layer comprises the following steps:

s1, before paving, quality inspection and acceptance are carried out on the lower bearing layer of the road, and after the quality is qualified, road paving is carried out;

s2, inputting the design parameters provided by the design institute into an automatic control system of the paver;

s3, establishing a GPS reference station and a laser elevation reference station at a control point, and configuring the number of laser transmitters according to the working distance of the laser transmitters;

s4, paving, wherein asphalt concrete in the hopper is conveyed to a spiral paving chamber under the action of a scraper conveyor, the asphalt concrete in the spiral paving chamber is uniformly distributed and paved on a road under the action of a spiral paver, during the period, a GPS (global position system) reference station and a laser elevation reference station transmit GPS differential signals and laser elevation information to a control system on the paver to be processed and compared to generate corresponding elevation correction information, and a hydraulic oil cylinder on a traction arm drives an ironing plate to adjust the direction, so that the pavement paving evenness and thickness are changed; meanwhile, the GPS mobile station monitors the paving condition in real time, and observes whether the paving effect meets the requirement of paving design, thereby facilitating the realization of automatic paving correction in the paving process;

s5, cleaning the residual asphalt mixture in the hopper regularly, specifically:

s51, starting a power part by a control system of the paver to drive the hopper to rotate towards the direction close to the scraper conveyor, driving the swing strip to rotate by the connecting rod in the process of following the movement of the hopper, and scraping off asphalt mixtures attached to the mounting table and the baffle plate by the hopper and the swing strip in the rotating process;

s52, controlling the partition board to move by the control system of the paver, wherein asphalt concrete attached to the surface of the partition board is scraped by the hopper in the process that the partition board moves relative to the hopper;

s53, the control system of the paver drives the movable plate to move through the driving piece, the movable plate scrapes and pushes asphalt concrete attached to the inner wall of the hopper to the scraper conveyor in the moving process, meanwhile, the gear rotates relative to the rack to rotate, so that the screw is driven to rotate, the scraper bar is driven to move, and asphalt mixture attached to the movable plate is hung down by the scraper bar and pushed to the scraper conveyor by the movable plate.

S6, compacting the pavement by using a road roller after the asphalt concrete is paved;

and S7, detecting various parameters of the molded pavement, and checking and accepting after the detection is qualified.

In summary, the present application includes at least one of the following beneficial technical effects:

the movable plate scrapes off asphalt concrete attached to the inner side wall and the inner bottom wall of the hopper, and the scraping strip scrapes off the asphalt concrete attached to the movable plate and conveys the asphalt concrete into the scraper conveyor, so that not only is the material saved, but also no consolidated material is generated in the hopper, and the flatness of subsequent asphalt concrete paving is improved;

the hopper, the first scraping assembly and the second scraping assembly scrape the asphalt concrete attached to the mounting table and the baffle plate in the rotating process, so that the mounting table and the baffle plate cannot be solidified, the materials are saved, and the flatness of the subsequent asphalt concrete pavement is improved;

the baffle plays the guard action to screw rod and guide bar to make asphalt concrete can not glue on screw rod and baffle, so that the scraping strip keeps smooth and easy in the removal process.

Drawings

Fig. 1 is a schematic view of a paver in this application with the hopper lying flat;

FIG. 2 is a schematic diagram of a paver after the hopper rotates in this application;

fig. 3 is a schematic view of the structure of the inside of the hopper in the present application.

Description of reference numerals:

1. a frame; 2. a scraper conveyor; 3. a cab; 4. an installation table; 5. a hopper; 6. a traveling device; 7. a spiral spreader; 8. a screed plate; 9. a first hydraulic cylinder; 10. a baffle plate; 11. a connecting strip; 12. a swing bar; 13. a movable plate; 14. a second hydraulic cylinder; 15. scraping the strips; 16. a linkage mechanism; 161. a screw; 162. a guide bar; 163. fixing a sleeve; 164. a fixing ring; 165. a rack; 166. a gear; 17. a partition plate; 18. a slot; 19. and a third hydraulic cylinder.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses an automatic accurate control elevation paving system of asphalt concrete pavement layer. Referring to fig. 1 and 2, the system comprises a GPS reference station, a laser elevation reference station, a GPS mobile station and a paver, wherein the paver comprises a frame 1, a scraper conveyor 2, an installation platform 4 for installing a cab 3, a hopper 5, a traveling device 6, a traction arm, a spiral paver 7, a compaction device and an ironing device are installed on the frame 1, wherein the traveling device 6 is a commonly-used crawler-type traveling device 6, and the ironing device comprises an ironing plate 8, a thickness regulator, an camber regulator and the like.

Referring to fig. 1, there are two hoppers 5, and two hoppers 5 are all installed at the front end of frame 1, and two hoppers 5 symmetric distribution are in scraper conveyor 2 direction of delivery's both sides, and hopper 5 is the rectangle setting, and hopper 5 is close to the one side opening setting of scraper conveyor 2. The mounting table 4 is arranged in the middle of the frame 1, and the lower end of the mounting table 4 is provided with an opening for the scraper conveyor 2 to pass through. The spiral paver 7 is arranged at the rear end of the frame 1, and the compaction device and the ironing device are arranged at the rear end of the spiral paver 7. The scraper conveyor 2 conveys the asphalt concrete from the hopper 5 toward the screw spreader 7.

Referring to fig. 1 and 2, one end of the hopper 5 close to the scraper conveyor 2 is hinged with the frame 1, and the frame 1 is provided with a power member for driving the hopper 5 to rotate. The power part is a first hydraulic cylinder 9, the first hydraulic cylinder 9 is positioned below the hopper 5, the cylinder body of the first hydraulic cylinder 9 is hinged with the rack 1, and the piston rod of the first hydraulic cylinder 9 is hinged with the bottom of the hopper 5. In the paving process, when the materials in the hopper 5 are to be discharged completely, the first hydraulic cylinder 9 drives the hopper 5 to rotate towards the direction close to the scraper conveyor 2 under the action of the automatic control system of the paver, and the residual asphalt concrete in the hopper 5 gradually falls on the scraper conveyor 2, so that the materials are conveniently fed.

Referring to fig. 1, a baffle 10 is installed at the front end of a frame 1, and two hoppers 5 are both arranged between the baffle 10 and an installation table 4. The baffle 10 shields the gap between the two hoppers 5 so that the asphalt concrete does not leak out of the hoppers 5. A pair of outer side walls of the hopper 5 opposite to each other are rotatably abutted against the mount 4 and the baffle 10, respectively.

Referring to fig. 1 and 2, a first scraping assembly is provided at a side of the hopper 5 adjacent to the baffle 10, and a second scraping assembly is provided at a side of the hopper 5 adjacent to the mounting table 4. The first scraping assembly is used for scraping asphalt concrete attached to the mounting table 4, and the second scraping assembly is used for scraping asphalt concrete attached to the baffle 10.

Referring to fig. 1, the first scraping assembly includes a connecting bar 11 and a swinging bar 12, one end of the connecting bar 11 is hinged to one side of the hopper 5 close to the scraper conveyor 2, and the other end of the connecting bar 11 is hinged to a side edge of the swinging bar 12. One end of the swing strip 12 is hinged to the mounting table 4, a hinged point of the swing strip 12 and the mounting table 4 is located at the upper end of the middle of the mounting table 4, and the swing strip 12 is in rotary butt joint with the mounting table 4. When the hopper 5 is horizontally placed on the rack 1, the free end of the swinging strip 12 is abutted against the lower end of the hopper 5, and at the moment, the included angle between the swinging strip 12 and the vertical plane is a swinging included angle; when one side of the hopper 5 close to the scraper conveyor 2 rotates by an angle equal to the swing included angle, the swing strips 12 rotate to be vertical, and two swing strips 12 on the same side abut against each other.

Referring to fig. 2, the second scraping assembly has the same structure as the first scraping assembly, and one end of the swing bar 12 on the second scraping assembly is hinged to the upper end of the middle of the baffle 10. A gap is reserved between the lower ends of the frame 1 and the baffle 10, so that the swing strip 12 can smoothly rotate, and when materials are fed into the hopper 5, the gap between the baffle 10 and the frame 1 is sealed by sponge or rubber pads, and the materials cannot leak out of the hopper 5.

Referring to fig. 1 and 2, when hopper 5 rotated towards being close to scraper conveyor 2 under the driving of pneumatic cylinder, connecting strip 11 followed hopper 5 motion and driven swing strip 12 and rotated, the rotation region of two hoppers 5 and four swing strips 12 is with mount table 4, baffle 10 depends on the regional cover that has asphalt concrete, thereby scrape off asphalt concrete that will depend on mount table 4 and baffle 10, make and not have the consolidation material to produce on mount table 4 and baffle 10, also make things convenient for later stage clearance mount table 4 and baffle 10. In use, the connecting strips 11 and the swinging strips 12 can be wrapped with rubber layers for later cleaning of the connecting strips 11 and the swinging strips 12.

Referring to fig. 1 and 3, a movable plate 13 is disposed in the hopper 5, a pair of inner sidewalls of the movable plate 13 opposite to the hopper 5 and an inner bottom wall of the hopper 5 are slidably abutted, and a driving member for driving the movable plate 13 to move is mounted on one side of the hopper 5 away from the scraper conveyor 2, and the driving member is a second hydraulic cylinder 14. The piston rod of the second hydraulic cylinder 14 passes through the side wall of the hopper 5 and is vertically and fixedly connected with the movable plate 13. The movable plate 13 scrapes and pushes asphalt concrete attached to the inner bottom wall and the pair of opposite inner side walls of the hopper 5 to the scraper conveyor 2 in the moving process, so that material waste is reduced, and the possibility of material consolidation is reduced.

The side of the movable plate 13 close to the scraper conveyor 2 is connected with a scraping strip 15 in a sliding mode, the scraping strip 15 extends along the length direction of the movable plate 13, the scraping strip 15 moves along the vertical direction, and the movable plate is covered by the movable area of the scraping strip 15. A linkage mechanism 16 which is connected with the movable plate 13 and synchronously moves with the movable plate 13 is arranged in the hopper 5.

Referring to fig. 3, the linkage mechanism 16 includes a screw 161 and a guide bar 162 disposed at both sides of the movable plate 13 in the length direction, the screw 161 and the guide bar 162 are disposed in parallel, a fixing sleeve 163 for mounting the screw 161 and a fixing ring 164 for mounting the guide bar 162 are fixedly connected to one side of the movable plate 13 where the scraping strip 15 is disposed, the screw 161 passes through the fixing sleeve 163 and is rotatably connected to the fixing sleeve 163 through a bearing, and the guide bar 162 and the fixing ring 164 are fixed by inserting. The screw 161 and the guide rod 162 penetrate through the scraper bar 15, the scraper bar 15 is in threaded connection with the screw 161, and the scraper bar 15 is in sliding connection with the guide rod 162. The upper end of one side of the hopper 5 close to the screw 161 is fixedly connected with a rack 165, and the upper end of the screw 161 is fixedly connected with a gear 166 which is in meshing transmission with the rack 165. When the movable plate 13 moves, the rack 165 moves relative to the rack 165 to rotate so as to drive the screw 161 to rotate, the guide rod 162 limits the scraping strip 15 to rotate along with the screw 161, so that the scraping strip 15 moves along the length direction of the screw 161, and the scraping strip 15 scrapes off asphalt concrete attached to the movable plate 13 during the moving process.

Referring to fig. 1, two partition plates 17 are disposed at two corners of the hopper 5, and the two partition plates 17 and the hopper 5 form two cavities in a triangular shape, wherein one cavity is used for accommodating the screw 161, and the other cavity is used for accommodating the guide rod 162. One side of the hopper 5 far away from the scraper conveyor 2 and the movable plate 13 are provided with through slots 18, and the partition plate 17 is in sliding insertion connection with the slots 18. The outer side wall of the side of the hopper 5 far away from the scraper conveyor 2 is provided with a third hydraulic cylinder 19 for driving the partition 17 to move, and a piston rod of the third hydraulic cylinder 19 passes through the slot 18 and is fixedly connected with the partition 17.

When feeding into the hopper 5, the screw 161 and the guide bar 162 are respectively placed in the two cavities, and the partition 17 protects the screw 161 and the guide bar 162, so that the asphalt concrete is not adhered to the screw 161 and the guide bar 162, and the scraper bar 15 is kept smooth in the moving process. When the scraping strips 15 need to be driven to move, the partition plates 17 are firstly removed, and asphalt concrete attached to the partition plates 17 is scraped off by the side walls of the hopper 5 when the partition plates 17 slide relative to the hopper 5, so that the partition plates 17 are kept clean.

The embodiment of the application also discloses an automatic and accurate elevation control paving method for the asphalt concrete pavement, which comprises the following steps:

and S1, before paving, quality inspection and acceptance are carried out on the road undersurface, and if the flatness and compactness of the undersurface are inspected and obvious pothole and slurry turning phenomena exist, the road paving can be carried out after the quality is qualified.

And S2, inputting the design parameters provided by the design institute, such as gradient, superelevation, curve elements and the like, into the automatic control system of the paver before paving.

And S3, establishing a GPS reference station and a laser elevation reference station at the control point, and configuring the number of the laser transmitters according to the working distance of the laser transmitters.

S4, paving, specifically, pouring asphalt concrete into the hopper 5 by the discharging car, conveying the asphalt concrete in the hopper 5 to the spiral paving chamber under the action of the scraper conveyor 2, uniformly distributing and paving the asphalt concrete in the spiral paving chamber on a road under the action of the spiral paver 7, and preliminarily compacting and leveling the paving layer by the compacting device and the ironing device according to the indication of the automatic control system and the corresponding width, thickness and camber.

In the period, the GPS reference station and the laser elevation reference station transmit the GPS differential signal and the laser elevation information to a control system of the paver for processing and comparison to generate corresponding elevation correction information, then the correction information is generated into corresponding driving signals, and a hydraulic oil cylinder on a traction arm drives the screed 8 to adjust the direction, so that the pavement evenness and thickness are changed. Meanwhile, the GPS mobile station can monitor the paving condition in real time, observe whether the paving effect meets the requirement of paving design, facilitate the paving process to realize automatic paving correction and improve the paving quality.

S5, cleaning residual asphalt concrete in the hopper 5 at regular time, specifically:

s51, when the asphalt concrete in hopper 5 is about to be discharged, the automatic control system of paver starts the hydraulic cylinder and rotates in order to order about hopper 5 towards the direction that is close to scraper conveyor 2, the connecting rod drives swing strip 12 and rotates at the in-process of following the motion of hopper 5, hopper 5 and swing strip 12 will depend on the asphalt concrete on mount table 4 and baffle 10 and scrape off rotating the process, thereby make baffle 10 and the asphalt concrete that can not produce the consolidation on the mount table 4, be favorable to improving the planarization after the road paves, and simultaneously, also make things convenient for the later stage to wash.

S52, after the materials in the hopper 5 are discharged, the control system of the paver controls the partition board 17 to move, and asphalt concrete attached to the surface of the partition board 17 is scraped off in the process that the partition board 17 moves relative to the hopper 5;

s53, the control system of paver orders about fly leaf 13 through the driving piece and removes, fly leaf 13 will depend on the asphalt concrete on the hopper 5 inner wall at the removal in-process and the propelling movement to scraper conveyor 2 on, simultaneously, gear 166 is relative rack 165 moves and takes place to rotate, thereby drive screw rod 161 and rotate, and then drive scraping strip 15 and remove, the asphalt concrete who depends on fly leaf 13 is hung down by scraping strip 15 and is pushed to scraper conveyor 2 by fly leaf 13 on, thereby make the asphalt concrete that can not have the consolidation in the hopper 5, be favorable to improving the planarization after the road paves, and simultaneously, also make things convenient for the later stage to wash.

And S6, compacting the road surface by using a road roller after the asphalt concrete is paved, wherein the rolling adopts a sequential rolling mode of initial pressing, re-pressing and final pressing.

And S7, detecting various parameters of the formed pavement, such as thickness field detection, compactness field detection, flatness field detection, bearing capacity field detection, pavement skid resistance field detection and the like, and checking and accepting after all the parameters are detected to be qualified.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.