Fabricated machine-made sand concrete pavement slab surface leveling equipment and method

Abstract

The invention relates to the technical field of constructional engineering, in particular to assembly type machine-made sand concrete pavement slab surface leveling equipment and method.The equipment comprises a mold arranged at the top of a mold table and a supporting frame arranged on the outer side of the mold table in a sleeving mode, and the tops of the left side wall and the right side wall of the supporting frame form a linear guide rail structure; a leveling mechanism is connected to the linear guide rail structure in a sliding mode, moves along the linear guide rail structure through a first driving mechanism and comprises a coordinate positioner and a leveling assembly moving along the coordinate positioner through a second driving mechanism. And the leveling assembly comprises a slurry surface flatness data acquisition unit, a leveling unit and a slurry surface flatness data rechecking unit. Through the procedures of data acquisition, overall planning, material supplementing, scraping and the like, the surface of the slurry can be fully leveled, the density uniformity is ensured, and the flatness and strength of a pavement slab are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly relates to an assembly-type manufactured sand concrete pavement surface leveling device and method. Background Art

[0002] Airport precast pavements are an important manifestation of expanding the precast application scenarios in the flight area. The construction process of precast airport pavements generally includes the following steps: ground treatment, foundation preparation, pavement slab layout, connection and fixation, joint grouting and surface treatment, and acceptance. The pavement slabs can be arranged and installed by mechanical equipment and connected and fixed through special connection methods to ensure the flatness, stability, and reliability of the pavement.

[0003] Among them, the main contents of the quality acceptance of precast airport pavements include:

[0004] 1. Dimensions and flatness: Check whether the dimensions of the pavement slabs meet the design requirements, including aspects such as length, width, and thickness. At the same time, check the flatness of the pavement to ensure that there are no obvious bumps, undulations, and the difference between adjacent slabs is within the allowable range, and the pavement flatness meets the requirements of the standard specifications, so as not to affect the takeoff, landing, and taxiing of aircraft.

[0005] 2. Strength and load-bearing capacity: Conduct strength tests to check whether the flexural strength and load-bearing capacity of the pavement slabs meet the requirements. Static load tests or dynamic load tests and other methods can be used for testing to ensure that the pavement can withstand airport loads.

[0006] 3. Surface appearance quality: Check whether the pavement surface is flat, smooth, and dense, and whether there are obvious cracks, potholes, looseness, damage, and other problems.

[0007] Therefore, it has become a problem that must be solved to produce pavement slabs with high flatness, uniform concrete density distribution, and strong structure.

[0008] Existing airport pavement slabs are formed by casting in molds. Generally, natural sand concrete is used for casting the concrete slabs. However, manufactured sand concrete can be used during casting. The fluidity of manufactured sand concrete is relatively poor compared to natural sand concrete. Therefore, the filling property is not good, and it is more likely to have protrusions and pits. So when injecting the manufactured sand concrete slurry into the mold, it is easy to cause unevenness on the surface, and it is necessary to level the surface of the manufactured sand concrete slurry. The traditional leveling method mainly relies on two workers to lift a flat plate and move it horizontally to complete the leveling process. To prevent the surface from being rough due to one-time leveling, the workers will first use a shovel to scoop up the slurry at the larger protruding positions and then fill it into the deeper depressions, and then use a flat plate for delicate manual leveling. However, deviations are inevitable during the manual leveling process, which not only has low efficiency but also makes it difficult to ensure the consistency of the upper surface leveling of the precast slab, resulting in poor overall quality.

[0009] Common concrete leveling equipment commonly used in the market includes a horizontal moving mechanism and a flat plate straddling both sides in the width direction of the mold. The flat plate is driven by the horizontal moving mechanism to move horizontally along the length direction of the mold to complete the leveling work. Although this mechanized leveling improves efficiency compared to manual work, this equipment can only rely on the flat plate to push flat the slurry at the raised parts and cannot comprehensively collect the data of the raised and sunken parts on the surface of the slurry, let alone push and fill the raised and sunken parts according to the collected data. Furthermore, it cannot ensure the uniform density of the slurry surface, so it is impossible to produce high-quality pavement slabs. Summary of the Invention

[0010] The present invention provides a surface leveling equipment and method for assembled manufactured sand concrete pavement slabs, aiming to produce high-quality airport pavement slabs. By collecting the data of the raised and sunken parts on the surface of the slurry, coordinating the treatment of the raised and sunken parts, and promoting the uniform density of the slurry surface, the flatness and structural strength of the pavement slab surface can be effectively guaranteed.

[0011] To solve the above problems, the technical solution of the present invention is as follows:

[0012] A surface leveling equipment for assembled manufactured sand concrete pavement slabs includes a mold arranged on the top of a mold table and a support frame sleeved outside the mold table. The top parts of the left and right side walls of the support frame form a linear guide rail structure. A leveling mechanism is slidably connected to the linear guide rail structure. The leveling mechanism moves along the linear guide rail structure through a first driving mechanism. The leveling mechanism includes a coordinate locator and a leveling component that moves along the coordinate locator through a second driving mechanism. The leveling component includes a slurry surface flatness data collection unit, a leveling unit, and a slurry surface flatness data review unit.

[0013] Preferably, the support frame is a square frame. The direction of the linear guide rail structure is the length direction of the mold. Adjustable-height support legs are arranged longitudinally at the bottoms of the four corners of the support frame. A support plate is arranged at the bottom end of the adjustable-height support legs. The mold table is equipped with a vibrator.

[0014] Preferably, the coordinate locator includes a first rectangular frame and a second rectangular frame. The bottom ends of the left and right sides of the first rectangular frame are slidably connected to a linear guide rail structure, and the first driving mechanism drives the first rectangular frame to move back and forth along the linear guide rail structure. The second rectangular frame spans across the top of the first rectangular frame in the left-right direction. A surface flatness data acquisition unit, a leveling unit, and a slurry surface flatness data verification unit are provided inside the second rectangular frame. The second driving mechanism includes a first linear driving mechanism for driving the surface flatness data acquisition unit, the leveling unit, and the slurry surface flatness data verification unit to move left and right inside the second rectangular frame, and a second linear driving mechanism for driving the second rectangular frame to move back and forth on the top of the first rectangular frame.

[0015] Preferably, first lead screws are respectively provided along the front-back direction at the top ends of the left and right sides of the first rectangular frame. The second driving mechanism includes a first servo motor. The two ends of the first lead screw are rotatably connected to the top end of the first rectangular frame through a first mounting plate. One end of the same side of the two first lead screws respectively penetrates through the first mounting plate and is respectively provided with a driving sprocket and a driven sprocket. The end of the first lead screw provided with the driving sprocket is provided with a first servo motor. The first servo motor is fixedly connected to the end of the first rectangular frame through a motor base, and the output shaft of the first servo motor is fixedly connected to the corresponding end of the first lead screw. The driving sprocket and the driven sprocket are connected by a chain drive. Threaded holes are respectively provided on the left and right sides of the front and rear ends of the second rectangular frame. The two first lead screws are respectively screwed into the two threaded holes on the same side. Driven by the first servo motor, the second rectangular frame moves back and forth on the top of the first rectangular frame.

[0016] Preferably, a second lead screw is provided along the left-right direction inside the second rectangular frame. The second driving mechanism further includes a second servo motor. The two ends of the second lead screw are respectively rotatably connected to the left and right ends of the second rectangular frame. One end of the second lead screw penetrates through the side wall of the second rectangular frame and is fixedly connected to the output shaft of the second servo motor preset on the outer surface of the side wall of the second rectangular frame. The surface flatness data acquisition unit includes a first moving seat, the leveling unit includes a second moving seat, and the slurry surface flatness data verification unit includes a third moving seat. The first moving seat, the second moving seat, and the third moving seat are arranged side by side from right to left and are respectively screwed to the second lead screw. The front and rear ends of the first moving seat, the second moving seat, and the third moving seat are respectively slidably connected to the inner wall of the second rectangular frame.

[0017] Preferably, it further includes a control mechanism. First laser distance sensors are arranged in an array at the bottom end of the first moving seat, and second laser distance sensors are arranged in an array at the bottom end of the third moving seat. The bottom end of the second moving seat is connected to a third servo motor through a vertically arranged first electric cylinder. The output shaft of the third servo motor extends vertically downward and is fixedly connected to a push plate structure. The width of the push plate structure is the same as the width of the second moving seat. The first moving seat, the second moving seat, and the third moving seat are all cube structures. A feeding pipe penetrates through the second moving seat. The top end of the feeding pipe is connected to a slurry supply mechanism through a flexible connecting pipe. The feeding pipe is provided with a solenoid valve. The control mechanism is configured to control the first driving mechanism and the second driving mechanism and is electrically connected to the first laser distance sensor, the second laser distance sensor, the third servo motor, the solenoid valve, the slurry supply mechanism, and the first electric cylinder respectively.

[0018] Preferably, the part of the front end of the first rectangular frame located inside the mold forms a first working area. A first scraping plate is arranged longitudinally at the bottom of the first working area. A plurality of second electric cylinders are evenly arranged in the left-right direction at the front end of the first working area. The piston rod of the second electric cylinder extends vertically downward and is fixedly connected to a triangular material leveling plate. A fixing plate is arranged horizontally at the front end of the cylinder barrel of the second electric cylinder. A high-definition camera is arranged at the bottom end of the fixing plate. The part of the rear end of the first rectangular frame located inside the mold forms a second working area. A second scraping plate is arranged longitudinally at the bottom of the second working area. The bottom ends of the first scraping plate and the second scraping plate are at the same height. The control mechanism is electrically connected to the second electric cylinder and the high-definition camera respectively through wires.

[0019] A method for using a surface leveling device for precast manufactured sand concrete pavement slabs includes the following steps:

[0020] A1. After the mold is filled with slurry, the first rectangular frame is driven by the first driving mechanism to move back and forth to level the raised parts on the surface of the slurry. The method of leveling is as follows: According to the raised images captured by the high-definition camera, if the volume of the raised part is relatively large, the depth of the material leveling plate inserted into the raised part is relatively deep, and vice versa, the inserted depth is relatively shallow. The specific inserted depth is set according to the size of the raised part. When it is the deepest, it is also ensured that the top of the material leveling plate does not sink into the slurry. When leveling, through the insertion and dispersion of the raised part by the material leveling plate, the surface density of the slurry is promoted to be uniform. When leveling for the last time, the first rectangular frame moves forward from the starting position. While leveling, the first scraping plate and the second scraping plate are used to scrape the surface of the slurry. When the material leveling plate moves to the front end of the mold, the second electric cylinder drives the material leveling plate to move up so that the bottom of the material leveling plate is higher than the bottom of the first scraping plate.

[0021] A2. The mold table drives the mold to vibrate through a vibrator to further promote the densification of the slurry.

[0022] A3. Enter the leveling process. The specific method is as follows: Taking the slurry surface range between the first working area and the second working area as 1 step distance, the first driving mechanism drives the first rectangular frame to move 1 step distance each time, and the entire leveling of the slurry surface inside the mold is achieved in multiple times; within the working range of each step distance, first, through the coordinated drive of the first linear drive mechanism and the second linear drive mechanism, the first moving seat is driven to the position where the corner of the mold is located, and data collection is carried out on the flatness of the slurry surface at the corner position. Then, under the drive of the second linear drive mechanism, the first moving seat moves horizontally until all the data in the current row is collected. Then, the first linear drive mechanism drives the first moving seat to move to the next row and continues data collection until all the data within the range of the said 1 step distance is collected; after the data collection is completed, the first electric cylinder extends to make the bottom end of the push plate structure flush with the bottom ends of the first scraping plate and the second scraping plate. The control mechanism controls the second moving seat to move to each raised position in sequence according to the collected data information, and pushes the slurry at the raised part into the pits on the slurry surface through the push plate structure. During this process, the third servo motor adjusts the orientation of the push plate structure according to the pushing direction and locks it. The first to the linear drive mechanism and the second linear drive mechanism adjust the position of the push plate structure in real time according to the position of the target pit, and the initial leveling of the slurry surface is achieved through the complementarity of the raised and the pits. When there are pit positions that cannot be filled by the slurry at the raised part, slurry is filled through the feeding pipe; after the leveling of 1 step distance is completed, the first driving mechanism drives the first rectangular frame to move 1 step distance, and the data collection and slurry leveling work are repeated again until all the slurry surfaces on the top of the mold are leveled. During this process, as the first rectangular frame moves, the slurry surface is scraped flat;

[0023] A4. Repeat step A3 multiple times repeatedly, and finally complete the leveling work of the slurry surface.

[0024] The surface leveling equipment and method for an assembled manufactured sand concrete pavement slab of the present invention have the following beneficial effects:

[0025] The present invention can be used to produce pavement slabs of ultra-high quality. Through the present invention, the flatness of the pavement slab surface can be significantly improved, ensuring uniform distribution of the slurry density on the pavement slab surface. The formed pavement slab has high strength and fully meets the special environmental use requirements of the airport. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The top view structural schematic diagram of the present invention;

[0027] Figure 2 The front view structural schematic diagram of the first working area of the present invention;

[0028] Figure 3 The side view structural schematic diagram of the first working area of the present invention;

[0029] Figure 4 1. Schematic diagram of the bottom view structure of the first moving seat of the present invention;

[0030] Figure 5 2. Schematic diagram of the bottom view structure of the second moving seat of the present invention;

[0031] Figure 6 3. Schematic diagram of the front view structure of the support frame of the present invention;

[0032] 1. Support frame; 11. Linear guide rail structure; 12. Support plate; 13. Adjustable-height support leg; 2. First rectangular frame; 21. First lead screw A; 22. First servo motor; 23. First lead screw B; 24. Chain; 3. Second rectangular frame; 31. Second lead screw; 32. Second servo motor; 33. Third moving seat; 34. Second moving seat; 341. First electric cylinder; 342. Pusher plate structure; 343. Third servo motor; 35. First moving seat; 351. First laser distance sensor; 4. Mold; 41. Slurry; 5. Feeding pipe; 201. First working area; 2011. First scraping plate; 2012. Second electric cylinder; 2013. Fixed plate; 2014. High-definition camera; 2015. Material leveling plate; 202. Second working area. Detailed implementation manners

[0033] The following description details the implementation manners of the present invention in a step-by-step manner. This description is only for the preferred embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0034] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure, and operation. Therefore, it should not be construed as a limitation to the present invention.

[0035] Embodiment 1

[0036] An assembled machine-made sand concrete pavement surface leveling device, as Figure 1As shown in the figure, it includes a mold 4 arranged on the top of a formwork (not shown in the figure, which is a commonly used device), and a support frame 1 sleeved on the outside of the formwork. The top parts of the left and right side walls of the support frame 1 form a linear guide rail structure 11. A leveling mechanism is slidably connected to the linear guide rail structure 11. The leveling mechanism moves along the linear guide rail structure 11 through a first driving mechanism. The leveling mechanism includes a coordinate locator and a leveling component that moves along the coordinate locator through a second driving mechanism. The leveling component includes a slurry surface flatness data acquisition unit, a leveling unit, and a slurry surface flatness data review unit.

[0037] In this embodiment, since the pits and protrusions on the slurry surface are randomly distributed, therefore, if high-quality pavement slabs are to be prepared, it is necessary to collect the flatness data of the slurry surface and perform leveling based on the collected data, which can ensure uniform density distribution on the slurry surface, and further ensure flatness and the strength of the slab.

[0038] Embodiment 2

[0039] As Figure 1 、 6 shown in the figure, the support frame 1 is a square frame, the direction of the linear guide rail structure 11 is the length direction of the mold 4, adjustable-height support legs 13 are arranged longitudinally at the four corners of the bottom of the support frame 1, a support plate 12 is arranged at the bottom end of the adjustable-height support legs 13, and the formwork is configured with a vibrator (a commonly used device).

[0040] Embodiment 3

[0041] As Figure 1 shown in the figure, the coordinate locator includes a first rectangular frame 2 and a second rectangular frame 3. The bottom parts of the left and right ends of the first rectangular frame 2 are slidably connected to the linear guide rail structure 11. The first driving mechanism drives the first rectangular frame 2 to move back and forth along the linear guide rail structure 11 (its driving form is a commonly used technology, such as by setting wheels that transmit power with the side wall of the support frame 1, driving the wheels to rotate through a motor, and connecting the motor to the first rectangular frame); the second rectangular frame 3 spans across the top of the first rectangular frame 2 in the left-right direction. A surface flatness data acquisition unit (used to collect the flatness of the slurry 41 surface and collect detailed data on pits and protrusions), a leveling unit (complement pits and protrusions based on the data and position information of pits and protrusions to achieve filling or scraping of the slurry), and a slurry surface flatness data review unit (review the flatness of the filled slurry surface to avoid errors) are arranged in the second rectangular frame 3. The second driving mechanism includes a first linear driving mechanism for driving the surface flatness data acquisition unit, the leveling unit, and the slurry surface flatness data review unit to move left and right in the second rectangular frame 3, and a second linear driving mechanism for driving the second rectangular frame 3 to move back and forth on the top of the first rectangular frame 2.

[0042] As shown Figure 1 in the figure, on the top parts of the left and right ends of the first rectangular frame 2, first lead screws (21, 23) are respectively arranged in the front-back direction. The second driving mechanism includes a first servo motor 22. Both ends of the first lead screws (21, 23) are rotatably connected to the top end of the first rectangular frame 2 through first mounting plates (not marked in the figure). One ends of the two first lead screws (21, 23) on the same side respectively penetrate through the first mounting plate and are respectively provided with a driving sprocket (not marked in the figure) and a driven sprocket (not marked in the figure). The end of the first lead screw (21, 23) provided with the driving sprocket is provided with the first servo motor 22. The first servo motor 22 is fixedly connected to the end of the first rectangular frame 2 through a motor base. The output shaft of the first servo motor 22 is fixedly connected to the corresponding end of the first lead screw (21, 23). The driving sprocket and the driven sprocket are connected by a chain 24. On the left and right sides of the front and rear ends of the second rectangular frame 3, threaded holes are respectively provided. The two first lead screws (21, 23) are respectively screwed with the two threaded holes on the same side. Driven by the first servo motor 22, the second rectangular frame 3 moves back and forth along the top of the first rectangular frame, realizing the coordinate adjustment in the Y-axis direction.

[0043] As shown Figure 1 in the figure, a second lead screw 31 is arranged in the second rectangular frame 3 in the left-right direction. The second driving mechanism further includes a second servo motor 32. Both ends of the second lead screw 31 are respectively rotatably connected to the left and right ends of the second rectangular frame 3. One end of the second lead screw 31 penetrates through the side wall of the second rectangular frame 3 and is fixedly connected to the output shaft of the second servo motor 32 preset on the outer surface of the side wall of the second rectangular frame 3. The flatness data acquisition unit includes a first moving seat 35, the leveling unit includes a second moving seat 34, and the slurry surface flatness data verification unit includes a third moving seat 33. The first moving seat 35, the second moving seat 34, and the third moving seat 33 are arranged side by side from right to left and are respectively screwed with the second lead screw 31. The front and rear ends of the first moving seat 35, the second moving seat 34, and the third moving seat 33 are respectively slidably connected to the inner wall of the second rectangular frame. The coordinate positions of the first to third moving seats in the X-axis direction are adjusted by the second servo motor.

[0044] Embodiment 4

[0045] As shown Figure 1 and 4 in the figure, a control mechanism is further included. A first laser ranging sensor 351 is arranged in an array at the bottom end of the first moving seat 35, and a second laser ranging sensor (not drawn in the figure, the same as Figure 4Similarly, through the first laser ranging sensor and the second laser ranging sensor, the specific dimensions of the protrusions and pits on the surface of the slurry can be measured, so as to estimate the surplus of the slurry at the protrusion part and the deficit of the slurry at the pit part. Through overall arrangement (filling the surplus of all protrusions into the deficit of all pits to achieve complementarity) and the principle of proximity (taking filling the nearest pit first for the protrusion and then pushing the excess slurry to farther pits), the protrusions and pits are made complementary to achieve leveling. At the same time, the parts with pits still existing during leveling can be replenished with slurry through the replenishing pipe;

[0046] As Figure 1 、 5 shown, the bottom end of the second moving seat 34 is connected with a third servo motor 343 through a vertically arranged first electric cylinder 341. The output shaft of the third servo motor 343 extends vertically downward and is fixedly connected with a push plate structure 342. The width of the push plate structure 342 is the same as the width of the second moving seat 34. The first moving seat 35, the second moving seat 34, and the third moving seat 33 are all cube structures. A replenishing pipe 5 penetrates through the second moving seat 34. The top end of the replenishing pipe 5 is connected with a slurry supply mechanism (not shown in the figure) through a flexible connecting pipe (not shown in the figure). The replenishing pipe is provided with an electromagnetic valve (not shown in the figure). The control mechanism is configured to control the first driving mechanism and the second driving mechanism and is electrically connected with the first laser ranging sensor 351, the second laser ranging sensor, the third servo motor 343, the electromagnetic valve, the slurry supply mechanism, and the first electric cylinder 341 respectively.

[0047] In this embodiment, through the step-by-step movement of the first moving seat 35, comprehensive data collection is carried out for the protrusions and depressions on each part of the surface of the slurry 41. After the collection, the control mechanism makes a path plan according to the relevant data to make the slurry complementary between the protrusions and pits. When making the slurry complementary, if pushing the slurry to the left, the push plate structure 342 is locked in the front-back direction, and then the second moving seat moves to the left to push the slurry to the left through the push plate structure, and so on for other directions. At the same time, the third servo motor can also flatten the surface of the slurry by rotating the push plate structure; through the overall planning of the control mechanism, the blind actions when the slurry protrusions and pits fill each other are avoided, and the phenomenon that a concave pit is formed at the original protrusion part after a certain place is filled is avoided, ensuring the uniform density of the slurry surface.

[0048] Embodiment 5

[0049] As Figure 1 shown, the part of the front end of the first rectangular frame 2 located inside the mold 4 constitutes a first working area 201, as Figure 2 、 3As shown, a first scraping plate 2011 is longitudinally provided at the bottom of the first working area 201. A plurality of second electric cylinders 2012 are evenly arranged in the left-right direction at the front end of the first working area 201. The piston rod of the second electric cylinder 2012 extends vertically downward and is fixedly connected to a triangular material leveling plate 2015. A fixing plate 2013 is horizontally provided at the front end of the cylinder barrel of the second electric cylinder 2012, and a high-definition camera 2014 is provided at the bottom end of the fixing plate 2013. As Figure 1 shown, the part of the rear end of the first rectangular frame 2 located inside the mold 4 constitutes a second working area 202. A second scraping plate is longitudinally provided at the bottom of the second working area 202 (for reference, see Figure 2 , 3 shown). The bottom ends of the first scraping plate 2011 and the second scraping plate are at the same height and are used to level the surface of the slurry successively. The control mechanism is electrically connected to the second electric cylinder 2012 and the high-definition camera 2014 through wires respectively. When the high-definition camera collects the raised data in front, the insertion depth of the corresponding material leveling plate into the raised part can be adjusted according to the size of the raised part. Thus, as the material leveling plate advances, the slurry forming the raised part is separated and pushed to both sides, realizing the adjustment of the slurry density at the raised part (the density of the raised part is usually higher due to the accumulation of slurry); since the positions of the raised parts are random, the present invention is provided with a plurality of material leveling plates and is controlled by the second electric cylinders respectively. During the advancing process, the density of the raised parts on the surface of the slurry is adjusted in a full range.

[0050] Embodiment 6

[0051] Based on the above embodiments, the present embodiment discloses a method for using an assembled machine-made sand concrete pavement surface leveling device, as Figures 1 - 6 shown, including the following steps:

[0052] A1. After the mold 4 is filled with the slurry, the first rectangular frame 2 is driven to move back and forth by the first driving mechanism to level the raised parts on the surface of the slurry. The method of leveling is as follows: according to the raised image captured by the high-definition camera 2014, if the volume of the raised part is relatively large, the depth of the leveling plate 2015 inserted into the raised part is relatively deep; otherwise, the inserted depth is relatively shallow. The specific inserted depth is set according to the size of the raised part. Even when it is the deepest, the top of the leveling plate 2015 is also prevented from being submerged in the slurry. During leveling, by inserting and dispersing the raised part with the leveling plate 2015 (after the leveling plate exceeds the raised part, it is lifted by the second electric cylinder to avoid affecting the non-raised part), the surface density of the slurry is promoted to be uniform. During the last leveling (that is, leveling can be carried out repeatedly, and each operation is as follows), the first rectangular frame 2 moves forward from the starting position. While leveling, the surface of the slurry 41 is scraped flat by the first scraping plate 2011 and the second scraping plate. When the leveling plate 2015 moves to the front end of the mold 4, the second electric cylinder drives the leveling plate 2015 to move upward, so that the bottom of the leveling plate 2015 is higher than the bottom of the first scraping plate, that is, it is separated from the surface of the slurry. Repeated leveling operations can avoid the phenomenon of uneven density distribution on the surface of the slurry caused by the existence of raised parts, and can also make the slurry more dense;

[0053] A2. The mold table drives the mold 4 to vibrate through the vibrator to further promote the densification of the slurry. It should be noted that usually, there is a lack of a sufficient leveling process before the mold table drives the mold to vibrate. Therefore, although the surface of the slurry is initially leveled by vibration, there is a hidden danger of uneven surface density of the slurry, resulting in poor structural strength of the later board. In the present invention, leveling is carried out by vibration after sufficient leveling;

[0054] A3. Enter the leveling process. The specific method is as follows: Taking the surface range of the slurry 41 between the first working area 201 and the second working area 202 as 1 step distance, the first driving mechanism drives the first rectangular frame 2 to move 1 step distance each time, and the entire leveling of the slurry surface in the mold 4 is achieved in multiple times; within the working range of each step distance, first, the first moving seat 35 is driven by the cooperation of the first linear driving mechanism and the second linear driving mechanism to the position where the corner of the mold 4 is located, and data collection is carried out on the flatness of the slurry surface at the corner position. Then, under the drive of the second linear driving mechanism, the first moving seat moves horizontally until all data collection of the current row is completed. Then, the first linear driving mechanism drives the first moving seat to move to the next row (that is, the first moving seat is moved forward so that the rear end of the first moving seat is aligned with the front end of the original position (of course, at this time, the first to third moving seats move forward synchronously)) and continue data collection until all data collection within the range of the said 1 step distance is completed; after the data collection is completed, the first electric cylinder 341 extends so that the bottom end of the push plate structure 342 is flush with the bottom ends of the first scraping plate and the second scraping plate. The control mechanism controls the second moving seat 34 to move to each convex position in sequence according to the collected data information, and the slurry at the convex part is pushed into the pits on the slurry surface through the push plate structure 342. During this process, the third servo motor adjusts the orientation of the push plate structure according to the pushing direction and locks it. The first to linear driving mechanisms and the second linear driving mechanism adjust the position of the push plate structure in real time according to the position of the target pit (for example, when filling the pit in the right front direction, the push plate structure is controlled to move to the right and at the same time move forward, that is, the purpose of filling the pit in the right front direction is achieved). The initial leveling of the slurry surface is realized through the complementarity of the convex and the pit. When there is a pit position that cannot be filled by the slurry at the convex part, the slurry is filled through the feeding pipe 5; after the leveling of 1 step distance is completed, the first driving mechanism drives the first rectangular frame 2 to move 1 step distance, and the data collection and slurry leveling work are repeated again until all the slurry surfaces on the top of the mold are leveled. During this process, as the first rectangular frame 2 moves, the slurry surface is scraped flat (through the first scraping plate and the second scraping plate); this step is to carry out fine leveling of the slurry surface to further improve the quality of the precast pavement slab; the first linear driving mechanism, the second linear driving mechanism, the third servo motor, and the push plate structure constitute a mechanical structure that can achieve the full complementarity of the convex and pit on the slurry surface and fully level the pits;

[0055] A4. Repeat step A3 multiple times repeatedly until the leveling work of the slurry surface is finally completed.

Claims

1. An assembled machine-made sand concrete pavement surface leveling device, characterized in that: It includes a mold provided at the top of the mold table and a support frame sleeved outside the mold table. The top parts of the left and right side walls of the support frame form a linear guide rail structure; A leveling mechanism is slidably connected to the linear guide rail structure. The leveling mechanism moves along the linear guide rail structure through a first driving mechanism. The leveling mechanism includes a coordinate locator and a leveling component that moves along the coordinate locator through a second driving mechanism; The leveling component includes a slurry surface flatness data acquisition unit, a leveling unit, and a slurry surface flatness data review unit.

2. The surface leveling device for the assembled manufactured sand concrete slab as described in claim 1, characterized in that: The support frame is a square frame. The direction of the linear guide rail structure is the length direction of the mold. Adjustable-height support legs are provided longitudinally at the four corners of the bottom of the support frame. A support plate is provided at the bottom end of the adjustable-height support legs. The mold table is configured with a vibrator.

3. The surface leveling device for prefabricated manufactured sand concrete road slabs according to claim 2, characterized in that: The coordinate locator includes a first rectangular frame and a second rectangular frame. The bottom parts of the left and right ends of the first rectangular frame are slidably connected to the linear guide rail structure. The first driving mechanism drives the first rectangular frame to move back and forth along the linear guide rail structure; The second rectangular frame spans across the top of the first rectangular frame in the left-right direction. A surface flatness data acquisition unit, a leveling unit, and a slurry surface flatness data review unit are provided inside the second rectangular frame; The second driving mechanism includes a first linear driving mechanism for driving the surface flatness data acquisition unit, the leveling unit, and the slurry surface flatness data review unit to move left and right inside the second rectangular frame, and a second linear driving mechanism for driving the second rectangular frame to move back and forth on the top of the first rectangular frame.

4. The surface leveling device for prefabricated manufactured sand concrete pavement slab according to claim 3, characterized in that: First lead screws are respectively provided at the top parts of the left and right ends of the first rectangular frame along the front-back direction; The second driving mechanism includes a first servo motor. The two ends of the first lead screw are rotatably connected to the top end of the first rectangular frame through a first mounting plate. One end of the same side of the two first lead screws respectively penetrates through the first mounting plate and is respectively provided with a driving sprocket and a driven sprocket. The end of the first lead screw provided with the driving sprocket is provided with a first servo motor; The first servo motor is fixedly connected to the end of the first rectangular frame through a motor seat. The output shaft of the first servo motor is fixedly connected to the corresponding end of the first lead screw. The driving sprocket and the driven sprocket are connected by a chain drive; Threaded holes are respectively provided on the left and right sides of the front and rear ends of the second rectangular frame. The two first lead screws are respectively screwed to the two threaded holes on the same side. Driven by the first servo motor, the second rectangular frame moves back and forth on the top of the first rectangular frame.

5. The surface leveling device for assembled manufactured sand concrete road slabs according to claim 4, characterized in that: A second lead screw is provided inside the second rectangular frame in the left-right direction. The second driving mechanism further includes a second servo motor. The two ends of the second lead screw are respectively rotatably connected to the left and right ends of the second rectangular frame. One end of the second lead screw penetrates through the side wall of the second rectangular frame and is fixedly connected to the output shaft of the second servo motor preset on the outer surface of the side wall of the second rectangular frame; The flatness data acquisition unit includes a first moving seat, the leveling unit includes a second moving seat, and the slurry surface flatness data review unit includes a third moving seat. The first moving seat, the second moving seat, and the third moving seat are arranged side by side from right to left and are respectively screwed to the second lead screw. The front and rear ends of the first moving seat, the second moving seat, and the third moving seat are respectively slidably connected to the inner wall of the second rectangular frame.

6. The surface leveling device for prefabricated manufactured sand concrete pavement slab according to claim 5, characterized in that: It further includes a control mechanism. First laser distance sensors are arranged in an array at the bottom end of the first moving seat, and second laser distance sensors are arranged in an array at the bottom end of the third moving seat. A third servo motor is connected to the bottom end of the second moving seat through a vertically arranged first electric cylinder; The output shaft of the third servo motor extends vertically downward and is fixedly connected to a push plate structure. The width of the push plate structure is the same as the width of the second moving seat. The first moving seat, the second moving seat, and the third moving seat are all cube structures. A feeding pipe passes through the second moving seat; The top end of the feeding pipe is connected to a slurry supply mechanism through a flexible connecting pipe. The feeding pipe is provided with an electromagnetic valve. The control mechanism is configured to control the first driving mechanism and the second driving mechanism and is electrically connected to the first laser distance sensor, the second laser distance sensor, the third servo motor, the electromagnetic valve, the slurry supply mechanism, and the first electric cylinder respectively.

7. The surface leveling device for the assembled manufactured sand concrete slab as described in claim 6, characterized in that: The front end of the first rectangular frame located inside the mold constitutes a first working area. A first scraping plate is arranged longitudinally at the bottom of the first working area. A number of second electric cylinders are evenly arranged in the left-right direction at the front end of the first working area. The piston rod of the second electric cylinder extends vertically downward and is fixedly connected to a triangular material leveling plate. The front end of the cylinder barrel of the second electric cylinder is provided with a fixing plate horizontally, and a high-definition camera is arranged at the bottom end of the fixing plate; The rear end of the first rectangular frame located inside the mold constitutes a second working area. A second scraping plate is arranged longitudinally at the bottom of the second working area. The bottom ends of the first scraping plate and the second scraping plate are at the same height. The control mechanism is electrically connected to the second electric cylinder and the high-definition camera through wires respectively.

8. The usage method of an assembled manufactured sand concrete pavement surface leveling device as described in claim 7, characterized in that: It includes the following steps: A1. After the mold is filled with slurry, the first rectangular frame is driven by the first driving mechanism to move back and forth to level the raised parts on the surface of the slurry. The method of leveling is as follows: According to the raised image captured by the high-definition camera, if the volume of the raised part is relatively large, the depth of the material leveling plate inserted into the raised part is relatively deep, and vice versa, the inserted depth is relatively shallow. The specific inserted depth is set according to the size of the raised part. When it is the deepest, it is also ensured that the top of the material leveling plate does not sink into the slurry; During leveling, by inserting and dispersing the raised parts with the material leveling plate, the surface density of the slurry is promoted to be uniform. During the last leveling, the first rectangular frame moves forward from the starting position. While leveling, the surface of the slurry is scraped flat by the first scraping plate and the second scraping plate. When the material leveling plate moves to the front end of the mold, the second electric cylinder drives the material leveling plate to move upward so that the bottom of the material leveling plate is higher than the bottom of the first scraping plate; A2. The mold table drives the mold to vibrate through a vibrator to further promote the densification of the slurry; A3. Enter the leveling process. The specific method is: Taking the surface range of the slurry between the first working area and the second working area as 1 step distance, the first driving mechanism drives the first rectangular frame to move 1 step distance each time, and the entire surface of the slurry in the mold is leveled in multiple times; Within the working range of each step, first, the first moving seat is driven to the position where the corner of the mold is located through the coordinated drive of the first linear drive mechanism and the second linear drive mechanism, and data is collected on the flatness of the surface of the slurry at the corner position. Then, under the drive of the second linear drive mechanism, the first moving seat moves horizontally until all the data in the current row is collected. Then, the first linear drive mechanism drives the first moving seat to move to the next row and continues to collect data until all the data within the range of the said 1 step is collected; After the data collection is completed, the first electric cylinder extends to make the bottom end of the push plate structure flush with the bottom ends of the first scraping plate and the second scraping plate. The control mechanism controls the second moving seat to move to each convex position in sequence according to the collected data information, and pushes the slurry at the convex part into the concave pits on the surface of the slurry through the push plate structure; During this process, the third servo motor adjusts the orientation of the push plate structure according to the pushing direction and locks it. The first to linear drive mechanisms and the second linear drive mechanism adjust the position of the push plate structure in real time according to the position of the target concave pit, and the surface of the slurry is initially leveled by the complementarity of the convex and concave pits. When there is a concave pit position that cannot be filled by the slurry at the convex part, slurry is filled through the feeding pipe to level it; after the leveling of 1 step is completed, the first drive mechanism drives the first rectangular frame to move one step, and the data collection and slurry leveling work are repeated again until the leveling of the surfaces of all the slurries on the top of the mold is completed. During this process, as the first rectangular frame moves, the surface of the slurry is scraped flat; A4. Repeat step A3 multiple times repeatedly, and finally complete the work of leveling the surface of the slurry.

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