Unequal-span prefabricated box girder flatness control device and using method

Abstract

The invention discloses an unequal-span prefabricated box girder flatness control device and a using method. The unequal-span prefabricated box girder flatness control device comprises an XYZ three-axis driving mechanism, a U-shaped frame is installed on the XYZ three-axis driving mechanism in a transmission mode, two side plates which are symmetrically arranged are fixedly connected to the inner wall of the U-shaped frame, and an L-shaped flattening plate and a circulating belt are installed between the two side plates; a leveling part, an inverted V-shaped elastic spacing part and a shaking part are sequentially arranged at the bottom of the circulating belt, a side V-shaped elastic part is arranged above the side of the shaking part, and an inclined transition part connected with the side V-shaped elastic part and the leveling part is arranged above the circulating belt; and a scraping plate is mounted on the outer wall, located at the turning position between the side V-shaped elastic part and the inclined transition part, of the circulating belt. The problems that in a traditional prefabricated box girder leveling process, water on the surface of concrete is disordered, so that a leveling tool adheres to the concrete, leveling operation is discontinuous, and the flatness is difficult to reach the standard are solved.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated box girders, and in particular to a flatness control device for prefabricated box girders of unequal spans and a use method thereof. Background Art

[0002] In the production of prefabricated box girders, the flatness of the concrete surface is directly related to the overall quality of the box girder. At present, there are many difficult-to-overcome technical bottlenecks in the leveling process of prefabricated box girders. In traditional leveling operations, due to the lack of a scientific and reasonable moisture control mechanism, the moisture distribution on the concrete surface is in a disordered state. When the leveling tool contacts the concrete, the surface moisture cannot play an auxiliary lubrication role. On the contrary, due to the uneven distribution, some areas have too much moisture, causing the fluidity of the concrete to change, and the leveling tool is deeply stuck in it and adheres to a large amount of concrete; if there is too little moisture in some areas, the friction between the concrete and the leveling tool will be too large, which will also cause the concrete to adhere to the surface of the tool.

[0003] This adhesion phenomenon seriously affects the continuity and flatness of the leveling operation. Workers have to interrupt the leveling process and frequently clean up the concrete adhering to the leveling tools, which not only greatly reduces work efficiency, but also makes it difficult to ensure the consistency of the flatness of the concrete surface during repeated cleaning and re-operation. It is easy to produce ups and downs, roughness and other defects, which cannot meet the strict standards of modern construction projects for high precision and high flatness of prefabricated box girders.

[0004] Although the industry has tried to alleviate this problem by improving the concrete mix ratio, optimizing the vibration process, and selecting new leveling materials, it has never been able to effectively solve the contradiction between the moisture on the concrete surface and the adhesion of the leveling tool. Therefore, the development of a prefabricated box girder flatness control device that can regulate the moisture on the concrete surface, prevent the adhesion of the leveling tool by precipitating moisture, and thus achieve efficient and high-precision leveling effects has become a key technical problem that urgently needs to be broken through in the current prefabricated box girder production field. The present invention came into being based on this technical background, and is committed to making up for the defects of the existing technology and promoting the innovation of the prefabricated box girder production process. Summary of the invention

[0005] In order to solve the problem that the disordered moisture on the concrete surface causes the adhesion of the leveling tools in the traditional prefabricated box girder leveling process, and the resulting discontinuous leveling operation and difficulty in meeting the flatness standard, the purpose of the present invention is to provide a flatness control device for prefabricated box girders of unequal spans and a method of use.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme: a device for controlling the flatness of a prefabricated box beam of unequal span, comprising an XYZ three-axis driving mechanism, a U-shaped frame is installed on the XYZ three-axis driving mechanism, two symmetrically arranged side plates are fixedly connected to the inner wall of the U-shaped frame, and an L-shaped spreading plate and a circulating belt are installed between the two side plates;

[0007] The bottom of the circulating belt is provided with a flattening part, an inverted V elastic spacer part and a shaking part in sequence, and a side V elastic part is provided above the shaking part, and an inclined transition part connected with the side V elastic part and the flattening part is provided above the shaking part;

[0008] A scraper is installed on the outer wall of the circulating belt at the turning point between the side V elastic part and the inclined transition part.

[0009] Preferably, the XYZ three-axis drive mechanism includes two symmetrically arranged X-axis linear motors, two Z-axis hydraulic cylinders are fixedly installed on the two transmission platforms on the two X-axis linear motors, and Y-axis linear motors are fixedly installed on the top of the telescopic ends of the two sprinkler Z-axis hydraulic cylinders, and the bottom of the transmission end of the Y-axis linear motor is fixedly connected to the top of the U-shaped frame.

[0010] Preferably, the inner wall of the circulating belt is meshed with two supporting rollers, two shaking rollers and a driving roller; the leveling portion is located between the two supporting rollers, the shaking portion is located between the two shaking rollers, and the driving roller is meshed with the inner wall at the turning point between the side V elastic portion and the inclined transition portion; the supporting rollers and the driving rollers are rotatably installed on the side walls of the side plates, and the side walls of the side plates are fixedly installed with a first motor, and the output end of the first motor is axially connected to one end of the driving roller.

[0011] Preferably, a circular hole is provided on the side wall of the side plate, and a driving disk is rotatably sleeved on the inner wall of the circular hole; a second motor connected to the axis at the center of the driving disk is fixedly installed on the inner wall of the driving disk, and the end face of the driving disk is eccentrically fixedly connected to the driving shaft, and a swing plate is rotatably installed on the outer wall of the side plate through a connecting shaft, and the ends of two shaking rollers are rotatably installed on the side wall of the swing plate through a connecting shaft, and a rectangular block is fixedly connected to the top of the swing plate, and a strip hole is vertically provided on the side wall of the rectangular block, and the driving shaft is slidably connected to the inner wall of the strip hole; two symmetrical vertical arc openings are provided on the side wall of the side plate near the bottom, and the shaking rollers move through the arc openings.

[0012] Preferably, two elastic support mechanisms are installed on the side plate, and the elastic support mechanism includes a fixed rod, a movable block is slidably sleeved on the outer wall of the fixed rod, a support column is rotatably installed on the side wall of the movable block, and a spring is sleeved on the outer wall of the fixed rod to press against the movable block;

[0013] A vertical rectangular hole is opened on the side wall of the side plate, a fixing rod is vertically fixedly connected to the inner wall of the vertical rectangular hole, two side walls of the movable block are slidably connected to the inner walls of the two sides of the vertical rectangular hole, an outer wall of the supporting column is vertically supported upward on the outer wall of the circulating belt, and is used to form an inverted V elastic spacer, and the bottom of the side plate is higher than the bottom of the L-shaped spreading plate;

[0014] A plurality of reinforcing ribs are fixedly connected inside the circulating belt.

[0015] Preferably, a transverse rectangular hole is opened on the side wall of the side plate, a fixing rod is horizontally fixedly connected to the inner wall of the transverse rectangular hole, two side walls of the movable block are slidably connected to the upper and lower inner walls of the transverse rectangular hole, and an outer wall of the support column is horizontally supported on the outer wall of the circulating belt for forming a side V elastic portion.

[0016] Preferably, the rocking portion is flush with the bottom of the leveling portion, and the bottom of the L-shaped spreading plate is 1-3 mm higher than the bottom of the leveling portion.

[0017] Preferably, the upper part of one lower end of the L-shaped spreading plate is chamfered vertically, the corner of the L-shaped spreading plate is arranged in an arc-shaped turn, a third motor is fixedly installed on the side wall of the side panel, the output end shaft of the third motor is connected to an auger blade arranged inside the L-shaped spreading plate, the outer wall of the auger blade is slidably connected to the inner wall of the arc-shaped corner of the L-shaped spreading plate, a circular discharge port is provided on the side panel away from the third motor, the axis of the circular discharge port coincides with the axis of the arc-shaped corner of the L-shaped spreading plate; a number of evenly arranged vibrating rods are fixedly installed on the side wall of the L-shaped spreading plate.

[0018] Preferably, the scraper is located directly above the L-shaped spreading plate, and the scraper includes an arc-shaped portion, and the inner wall of the arc-shaped portion is slidably connected to the outer wall at the turning point between the side V elastic portion and the inclined transition portion. The scraper also includes a strip plate arranged at the bottom of the arc-shaped portion; a rotating rod is rotatably installed on the side wall between the two side plates through a connecting shaft, and a plurality of rubber rods are fixedly connected to the outer wall of the rotating rod, and a rubber head is fixedly connected to the end of the rubber rod for knocking the inner wall above the side V elastic portion; a small gear is fixedly connected to one end of the rotating rod, and the small gear is meshed with a large gear axially connected to one end of the driving roller.

[0019] A method for using a device for controlling the flatness of a prefabricated box girder of unequal span comprises the following steps:

[0020] S1, the prefabricated box beam is cast under the circulating belt, the XYZ three-axis driving mechanism drives the circulating belt to descend, and the bottom of the circulating belt descends to the required height for leveling;

[0021] S2, the circulating belt runs, the XYZ three-axis driving mechanism drives the circulating belt to move in the X-axis direction and move toward the front of the L-shaped spreading plate, and the L-shaped spreading plate scoops up the concrete higher than the bottom of the L-shaped spreading plate; at the same time, its bottom preliminarily flattens the concrete;

[0022] S3, the XYZ three-axis driving mechanism drives the shaking part to move onto the initially flattened concrete, the shaking part presses the concrete, and shakes the concrete below it to press out the bubbles and precipitate the moisture on the surface of the concrete;

[0023] S4, the XYZ three-axis driving mechanism drives the circulating belt to move to the leveling part to move to the shaken concrete for final leveling;

[0024] S5, as the circulating belt runs, the circulating belt runs from the shaking part to the side V elastic part, and then runs to the turning part between the side V elastic part and the inclined transition part, the scraper scrapes off the concrete adhered to the circulating belt and drops it into the L-shaped spreading plate;

[0025] S6, the scraped clean circulating belt then runs to the inclined transition part and the leveling part in sequence.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention shakes the concrete with the shaking part, which can not only shake out the bubbles, but also precipitate the moisture on the surface of the concrete, so that the leveling part will not adhere to the concrete, making the leveling smoother.

[0028] 2. The present invention realizes the leveling control of the surface flatness of the prefabricated box girder concrete by cyclically cooperating the leveling part, the inverted V elastic spacer part, the shaking part, the side V elastic part and the inclined transition part which are sequentially arranged at the bottom of the circulating belt.

[0029] 3. In the present invention, the concrete adhered to the belt after leveling can be knocked off through the circulation of the circulating belt, and the scraper can scrape the concrete adhered to the circulating belt and drop it into the L-shaped spreading plate, thereby avoiding the residue of concrete on the circulating belt and ensuring the cleanliness of the circulating belt, thereby ensuring the continuous and stable progress of the leveling operation and reducing the workload and time cost of manual cleaning.

[0030] 4. The chamfered vertical design and arc-shaped turning corners of the L-shaped spreading plate, as well as the coordinated work of the internal auger blades and the circular discharge port, push the accumulated concrete to the side that has not been leveled. At the same time, several vibrating rods installed on the side wall of the L-shaped spreading plate vibrate the concrete during operation, further improving the density of the concrete, optimizing the processing effect of the concrete, and thus improving the overall quality of the prefabricated box beam.

[0031] 5. The present invention provides the inverted V elastic spacer and the side V elastic portion so that the shaking portion has enough space when shaking. At the same time, the inverted V elastic spacer separates the leveling portion and the shaking portion to prevent the shaking portion from affecting the leveling work of the leveling portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a three-dimensional structural schematic diagram of the circulating belt of the present invention;

[0035] Figure 3 It is a schematic diagram of the structure of a part of one side of the circular discharge port of the present invention;

[0036] Figure 4 It is a schematic structural diagram of the circulating belt of the present invention from the side;

[0037] Figure 5 It is a structural schematic diagram of the elastic support mechanism of the present invention;

[0038] Figure 6 It is a structural schematic diagram of the swing plate of the present invention;

[0039] Figure 7 It is a schematic structural diagram of the side panel of the present invention.

[0040] In the figure: 1, XYZ three-axis driving mechanism; 2, U-shaped frame; 3, side plate; 4, L-shaped spreading plate; 5, circulating belt; 6, scraper; 7, supporting roller; 8, shaking roller; 9, driving roller; 10, elastic supporting mechanism; 11, vibrating rod; 12, rotating rod; 101, X-axis linear motor; 102, Z-axis hydraulic cylinder; 103, Y-axis linear motor; 501, leveling part; 502, inverted V elastic spacer; 503, shaking part; 504, side V elastic part; 505, inclined transition part; 901, first motor; 801, driving disk; 802, second motor; 803, drive shaft; 804, swing plate; 805, rectangular block; 806, strip hole; 301, arc opening; 1001, fixed rod; 1002, movable block; 1003, support column; 1004, spring; 302, vertical rectangular hole; 303, horizontal rectangular hole; 304, circular discharge port; 401, third motor; 402, auger blade; 601, arc portion; 602, strip plate; 1201, rubber rod; 1202, rubber head; 1203, small gear; 1204, large gear. DETAILED DESCRIPTION

[0041] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0042] See also Figures 1 to 7. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0043] The present invention provides a technical solution: a flatness control device for prefabricated box girders of unequal spans, comprising an XYZ three-axis drive mechanism 1; two X-axis linear motors 101 are symmetrically arranged on both sides of the prefabricated box girder template. The X-axis linear motor 101 can accurately control the displacement in the X-axis direction and provide power for the movement of the entire device in the width direction of the prefabricated box girder. Two Z-axis hydraulic cylinders 102 are respectively fixedly mounted on the transmission platforms of the two X-axis linear motors 101. The Z-axis hydraulic cylinder 102 can adjust the height of the device in the vertical direction through telescopic adjustment to meet the needs of different casting heights. A Y-axis linear motor 103 is fixedly installed on the top of the telescopic end of the Z-axis hydraulic cylinder 102. The bottom of the transmission end of the Y-axis linear motor 103 is fixedly connected to the top of the U-shaped frame 2. Its main function is to meet the leveling operation of the prefabricated box girders of unequal spans in the length direction. Through the adjustment of the Y-axis linear motor 103, it can flexibly operate on prefabricated box girders of different spans.

[0044] The U-shaped frame 2 serves as the bearing frame of the entire device, and its inner wall is fixedly connected with two symmetrically arranged side panels 3. The side panels 3 provide a mounting base for various components to be installed later. The bottom of the side panels 3 is higher than the bottom of the L-shaped spreading plate 4. This design ensures that during the operation of the device, the side panels 3 will not interfere with the leveling operation of the L-shaped spreading plate 4 on the concrete, and can also protect the side panels 3 from excessive impact and wear of the concrete.

[0045] The L-shaped spreading plate 4 is installed between the two side panels 3. The upper part of the lower end is a chamfered vertical design, which helps to shovel concrete more smoothly and reduce the resistance of concrete to the spreading plate. The corners of the L-shaped spreading plate 4 are set with arc turns. This design can avoid the accumulation of concrete at the corners and make the flow of concrete in the spreading plate smoother. A third motor 401 is fixedly installed on the side wall of the side panel 3, and the output end shaft of the third motor 401 is connected to the auger blade 402 arranged inside the L-shaped spreading plate 4. The outer wall of the auger blade 402 is slidably connected to the inner wall of the arc turn at the corner of the L-shaped spreading plate 4. The auger blade 402 is driven to rotate by the third motor 401, and the concrete in the L-shaped spreading plate 4 can be pushed out from the circular discharge port 304. A circular discharge port 304 is provided on the side plate 3 away from the third motor 401, and the axis of the circular discharge port 304 coincides with the axis of the arc-shaped corner of the L-shaped spreading plate 4. Such a design can ensure that concrete is evenly pushed out of the discharge port, providing a stable source of concrete for subsequent leveling operations. In addition, a number of evenly arranged vibrating rods 11 are fixedly installed on the side wall of the L-shaped spreading plate 4, and the vibrating rods 11 can vibrate the concrete during operation to further improve the density and flatness of the concrete.

[0046] The circulating belt 5 is also installed between the two side plates 3, and its bottom has a unique structural design. A leveling part 501, an inverted V elastic spacer 502 and a shaking part 503 are arranged in sequence, a side V elastic part 504 is arranged on the side and above the shaking part 503, and an inclined transition part 505 connected to the side V elastic part 504 and the leveling part 501 is arranged above the side V elastic part 504. The inner wall of the circulating belt 5 is engaged with two supporting rollers 7, two shaking rollers 8 and a driving roller 9. Among them, the leveling part 501 is located between the two supporting rollers 7. When the concrete is finally leveled, the leveling part 501 uses its smooth surface to compact and smooth the concrete surface. The shaking part 503 is located between the two shaking rollers 8. When the concrete is shaken, the shaking part 503 is driven to shake by the swing of the two shaking rollers 8, thereby pressing out the bubbles in the concrete and allowing moisture to precipitate from the concrete surface. The driving roller 9 is engaged with the inner wall of the turning point between the side V elastic portion 504 and the inclined transition portion 505, and is driven by a first motor 901 fixedly installed on the side wall of the side plate 3. The output end of the first motor 901 is axially connected to one end of the driving roller 9 to provide power for the operation of the circulating belt 5.

[0047] The arrangement of the inverted V elastic spacer 502 and the side V elastic portion 504 ensures that the shaking portion 503 has enough space when shaking. At the same time, the inverted V elastic spacer 502 separates the leveling portion 501 and the shaking portion 503 to prevent the shaking of the shaking portion 503 from affecting the leveling work of the leveling portion 501.

[0048] The scraper 6 is installed on the outer wall of the endless belt 5 at the turning point between the side V elastic part 504 and the inclined transition part 505. The scraper 6 includes an arc-shaped part 601, and the inner wall of the arc-shaped part 601 is slidably connected to the outer wall of the turning point between the side V elastic part 504 and the inclined transition part 505, which can effectively scrape off the concrete adhered to the endless belt 5 at this point. The scraper 6 also includes a strip plate 602 arranged at the bottom of the arc-shaped part 601, which further enhances the scraping effect of the scraper 6.

[0049] The supporting roller 7 and the driving roller 9 are rotatably mounted on the side wall of the side plate 3. The driving roller 9 is driven by the first motor 901 to drive the circulating belt 5 to operate. For the shaking roller 8, a circular hole is opened on the side wall of the side plate 3, and a driving disk 801 is rotatably sleeved on the inner wall of the circular hole. A second motor 802 connected to the center of the driving disk 801 is fixedly mounted on the inner wall of the driving disk 801, and a driving shaft 803 is eccentrically fixedly connected to the end face of the driving disk 801. A swing plate 804 is rotatably mounted on the outer wall of the side plate 3 through a connecting shaft, and the ends of the two shaking rollers 8 are rotatably mounted on the side wall of the swing plate 804 through a connecting shaft, and a rectangular block 805 is fixedly connected to the top of the swing plate 804, and a strip hole 806 is vertically opened on the side wall of the rectangular block 805, and the driving shaft 803 is slidably connected to the inner wall of the strip hole 806. The side wall of the side plate 3 near the bottom is provided with two symmetrical vertical arc openings 301, and the shaking rollers 8 move through the arc openings 301. When the second motor 802 drives the driving disk 801 to rotate, the driving shaft 803 moves in a circular track and slides in the strip hole 806, and then drives the two ends of the swing plate 804 to swing back and forth through the rectangular block 805, so that the two shaking rollers 8 follow the swing, and the shaking operation of the concrete below the shaking part 503 is realized.

[0050] Two elastic support mechanisms 10 are installed on the side plate 3, which are used to form the inverted V elastic spacer 502 and the side V elastic part 504. The elastic support mechanism 10 includes a fixed rod 1001, the outer wall of the fixed rod 1001 is slidably sleeved with a movable block 1002, the side wall of the movable block 1002 is rotatably mounted with a support column 1003, and the outer wall of the fixed rod 1001 is sleeved with a spring 1004 that is tightly pressed against the movable block 1002. For forming the inverted V elastic spacer 502, a vertical rectangular hole 302 is opened on the side wall of the side plate 3, the fixed rod 1001 is vertically fixedly connected to the inner wall of the vertical rectangular hole 302, the two side walls of the movable block 1002 are slidably connected to the two side inner walls of the vertical rectangular hole 302, and the outer wall of the support column 1003 is vertically supported upward on the outer wall of the circulating belt 5. During the operation of the circulating belt 5, the support column 1003, under the action of the spring 1004, can flexibly adjust the support strength according to the pressure of the concrete and the deformation of the circulating belt 5, thereby forming an inverted V elastic spacer 502. For forming the side V elastic part 504, the side wall of the side plate 3 is provided with a transverse rectangular hole 303, the fixed rod 1001 is horizontally fixedly connected to the inner wall of the transverse rectangular hole 303, the two side walls of the movable block 1002 are slidably connected to the upper and lower inner walls of the transverse rectangular hole 303, and the outer wall of the support column 1003 is horizontally supported on the outer wall of the circulating belt 5, and also under the action of the spring 1004, a side V elastic part 504 is formed. In addition, a number of reinforcing ribs are fixedly connected inside the circulating belt 5 to prevent the support column 1003 from deforming and falling off when supporting the circulating belt 5, thereby ensuring the structural stability and service life of the circulating belt 5.

[0051] The side wall between the two side plates 3 is rotatably mounted with a rotating rod 12 through a connecting shaft, and the outer wall of the rotating rod 12 is fixedly connected with a plurality of rubber rods 1201, and the end of the rubber rod 1201 is fixedly connected with a rubber head 1202. One end of the rotating rod 12 is fixedly connected with a small gear 1203, and the small gear 1203 is meshed with a large gear 1204 axially connected to one end of the driving roller 9. When the driving roller 9 rotates, the small gear 1203 is driven to rotate by the large gear 1204, thereby rotating the rotating rod 12, so that the rubber head 1202 continuously knocks the inner wall above the side V elastic part 504, knocking off the concrete adhered to the circulating belt 5, further improving the cleaning effect of the circulating belt 5, and preventing the residual concrete on the circulating belt from affecting subsequent operations.

[0052] A method for using a flatness control device for prefabricated box girders of unequal spans:

[0053] Step 1, put the device in place:

[0054] When the prefabricated box beam is cast, two X-axis linear motors 101 are set on both sides of the prefabricated box beam template. The XYZ three-axis drive mechanism 1 is started, and the circulating belt 5 is driven to descend through the Z-axis hydraulic cylinder 102 until the bottom of the circulating belt 5 descends to the required height for leveling. In this process, the height of the circulating belt 5 needs to be accurately adjusted according to the design requirements of the prefabricated box beam and the actual casting situation to ensure that the subsequent leveling operation can achieve the desired effect.

[0055] Step 2, initial flattening:

[0056] Start the first motor 901 to drive the driving roller 9 to rotate, thereby driving the circulating belt 5 to run. At the same time, the XYZ three-axis drive mechanism 1 drives the circulating belt 5 to move in the X-axis direction and move toward the front of the L-shaped spreading plate 4. During the movement, the L-shaped spreading plate 4 scoops up the concrete above the bottom of the L-shaped spreading plate 4, and uses its bottom to preliminarily flatten the concrete. At the same time, start the third motor 401 to drive the auger blade 402 to rotate, and push the concrete in the L-shaped spreading plate 4 out of the circular discharge port 304. The circular discharge port 304 is located on the side of the concrete that has not been leveled, and the pushed out concrete can be supplemented to the area that needs further flattening, providing sufficient concrete materials for subsequent operations. In this step, it is necessary to pay attention to controlling the moving speed of the circulating belt 5 and the scooping height of the L-shaped spreading plate 4, as well as the rotation speed of the auger blade 402, to ensure that the initial flattening effect is uniform and stable.

[0057] Step 3, concrete shaking:

[0058] The XYZ three-axis drive mechanism 1 drives the shaking part 503 to move onto the preliminarily flattened concrete. The shaking part 503 presses the concrete and shakes the concrete below it at the same time. In this process, the second motor 802 is started, and the second motor 802 causes the drive disk 801 to rotate, and the drive shaft 803 runs in a circular track, while sliding in the strip hole 806, and then drives the two ends of the swing plate 804 to swing back and forth through the rectangular block 805, and the two shaking rollers 8 follow the swing, so that the shaking part 503 is shaken. Through the shaking operation, the bubbles in the concrete can be pressed out, and the water can be precipitated on the surface of the concrete. These precipitated water can reduce the adhesion between the concrete and the leveling part 501 in the subsequent leveling operation, making the leveling smoother. In this step, it is necessary to reasonably adjust the rotation speed of the second motor 802 and the shaking amplitude of the shaking part 503 according to the characteristics of the concrete and the casting thickness to achieve the best shaking effect.

[0059] Step 4, final leveling:

[0060] The XYZ three-axis drive mechanism 1 drives the circulating belt 5 to move, so that the leveling part 501 moves to the concrete after shaking for final leveling. Since moisture is precipitated on the surface of the concrete after shaking, the leveling part 501 will not adhere to the concrete during the leveling process, and the concrete surface can be compacted and smoothed more smoothly, further improving the flatness of the concrete. In this step, it is necessary to ensure that the moving speed of the circulating belt 5 is uniform and stable, so that the leveling part 501 can perform comprehensive and detailed leveling of the concrete.

[0061] Step 5, Circulation Belt Cleaning:

[0062] As the circulating belt 5 runs, when the circulating belt 5 runs from the shaking part 503 to the side V elastic part 504, the rotating rod 12 rotates under the transmission action of the small gear 1203 and the large gear 1204, so that the rubber head 1202 continuously knocks the inner wall above the side V elastic part 504, knocking off the concrete adhered to the circulating belt 5. Then, the circulating belt 5 runs to the turning point between the side V elastic part 504 and the inclined transition part 505, and the scraper 6 scrapes off the concrete adhered to the circulating belt 5, and drops it into the L-shaped flat plate 4. Through the knocking of the rubber head 1202 and the scraping operation of the scraper 6, the circulating belt 5 can be effectively cleaned, and the residual concrete on the circulating belt can be prevented from affecting the subsequent operation. In this step, it is necessary to ensure that the rotation speed of the rotating rod 12 and the scraping force of the scraper 6 are moderate, so that the circulating belt 5 can be effectively cleaned without causing damage to the circulating belt 5.

[0063] Step 6, loop operation:

[0064] The scraped circulating belt 5 then runs to the inclined transition part 505 and the leveling part 501 in turn to continue the next round of leveling operation. This cycle is repeated until the flatness control operation of the entire prefabricated box beam is completed. During the entire operation process, it is necessary to monitor the operating status of the device in real time, and adjust the speed of each motor, the moving speed and position of the XYZ three-axis drive mechanism 1 and other parameters according to the actual situation to ensure that the flatness of the prefabricated box beam meets the design requirements.

[0065] Through the detailed description of the above specific implementation methods, the unequal span prefabricated box girder flatness control device and the use method thereof of the present invention can effectively improve the flatness of the prefabricated box girder, has the advantages of simple operation, high efficiency, good leveling effect, etc., and has broad application prospects in the production field of prefabricated box girders.

[0066] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A device for controlling the flatness of prefabricated box girders of unequal spans, comprising an XYZ three-axis driving mechanism (1), characterized in that: A U-shaped frame (2) is installed on the XYZ three-axis driving mechanism (1), the inner wall of the U-shaped frame (2) is fixedly connected with two symmetrically arranged side plates (3), and an L-shaped spreading plate (4) and a circulating belt (5) are installed between the two side plates (3); The bottom of the circulating belt (5) is provided with a flattening portion (501), an inverted V elastic spacer portion (502) and a shaking portion (503) in sequence, and a side V elastic portion (504) is provided above the shaking portion (503), and an inclined transition portion (505) connected to the side V elastic portion (504) and the flattening portion (501) is provided above the side V elastic portion (504); A scraper (6) is installed on the outer wall of the circulating belt (5) at the turning point between the side V elastic part (504) and the inclined transition part (505).

2. The device for controlling the flatness of prefabricated box girders of unequal spans according to claim 1, characterized in that: The XYZ three-axis driving mechanism (1) comprises two symmetrically arranged X-axis linear motors (101), two transmission platforms on the two X-axis linear motors (101) are fixedly mounted with two Z-axis hydraulic cylinders (102), the tops of the telescopic ends of the two watering Z-axis hydraulic cylinders (102) are fixedly mounted with Y-axis linear motors (103), and the bottom of the transmission end of the Y-axis linear motor (103) is fixedly connected to the top of the U-shaped frame (2).

3. The device for controlling the flatness of prefabricated box girders of unequal spans according to claim 1, characterized in that: The inner wall of the circulating belt (5) is meshed with two supporting rollers (7), two shaking rollers (8) and a driving roller (9); the flattening portion (501) is located between the two supporting rollers (7), the shaking portion (503) is located between the two shaking rollers (8), and the driving roller (9) is meshed with the inner wall of the turning point between the side V elastic portion (504) and the inclined transition portion (505); the supporting roller (7) and the driving roller (9) are rotatably mounted on the side wall of the side plate (3), and the side wall of the side plate (3) is fixedly mounted with a first motor (901), and the output end of the first motor (901) is axially connected to one end of the driving roller (9).

4. The device for controlling the flatness of prefabricated box girders of unequal spans according to claim 3 is characterized in that: A circular hole is formed on the side wall of the side plate (3), and a driving disk (801) is rotatably sleeved on the inner wall of the circular hole; a second motor (802) connected to the center of the driving disk (801) is fixedly mounted on the inner wall of the driving disk (801); a driving shaft (803) is eccentrically fixedly connected to the end face of the driving disk (801); a swing plate (804) is rotatably mounted on the outer wall of the side plate (3) via a connecting shaft; the ends of the two shaking rollers (8) are connected via a connecting shaft. The shaft is rotatably mounted on the side wall of the swing plate (804); a rectangular block (805) is fixedly connected to the top of the swing plate (804); a strip hole (806) is vertically opened on the side wall of the rectangular block (805); the driving shaft (803) is slidably connected to the inner wall of the strip hole (806); two symmetrical vertical arc openings (301) are opened on the side wall of the side plate (3) near the bottom; the shaking roller (8) moves through the arc opening (301).

5. The device for controlling the flatness of prefabricated box girders of unequal spans according to claim 1, characterized in that: Two elastic support mechanisms (10) are installed on the side plate (3), and the elastic support mechanism (10) includes a fixed rod (1001), the outer wall of the fixed rod (1001) is slidably sleeved with a movable block (1002), the side wall of the movable block (1002) is rotatably mounted with a support column (1003), and the outer wall of the fixed rod (1001) is sleeved with a spring (1004) pressed against the movable block (1002); the side wall of the side plate (3) is provided with a vertical rectangular hole (302 ), the fixing rod (1001) is vertically fixedly connected to the inner wall of the vertical rectangular hole (302), the two side walls of the movable block (1002) are slidably connected to the two side inner walls of the vertical rectangular hole (302), the outer wall of the support column (1003) is vertically supported upward on the outer wall of the circulating belt (5) for forming an inverted V-shaped elastic spacer (502), the bottom of the side plate (3) is higher than the bottom of the L-shaped spreading plate (4); a plurality of reinforcing ribs are fixedly penetrated inside the circulating belt (5).

6. The device for controlling the flatness of prefabricated box girders of unequal spans according to claim 5, characterized in that: The side wall of the side plate (3) is provided with a transverse rectangular hole (303), the fixing rod (1001) is horizontally fixedly connected to the inner wall of the transverse rectangular hole (303), the two side walls of the movable block (1002) are slidably connected to the upper and lower inner walls of the transverse rectangular hole (303), and the outer wall of the support column (1003) is horizontally supported on the outer wall of the circulating belt (5) for forming the side V elastic part (504).

7. The device for controlling the flatness of prefabricated box girders of unequal spans according to claim 5, characterized in that: The shaking portion (503) is flush with the bottom of the leveling portion (501), and the bottom of the L-shaped spreading plate (4) is 1-3 mm higher than the bottom of the leveling portion (501).

8. The device for controlling the flatness of prefabricated box girders of unequal spans according to claim 5, characterized in that: The upper part of one lower end of the L-shaped spreading plate (4) is chamfered and vertical, and the corner of the L-shaped spreading plate (4) is arranged in an arc-shaped turn. The side wall of the side panel (3) is fixedly installed with a third motor (401), and the output end shaft of the third motor (401) is connected to an auger blade (402) arranged inside the L-shaped spreading plate (4). The outer wall of the auger blade (402) is slidably connected to the inner wall of the arc-shaped corner of the L-shaped spreading plate (4). A circular discharge port (304) is provided on the side panel (3) away from the third motor (401), and the axis of the circular discharge port (304) coincides with the axis of the arc-shaped corner of the L-shaped spreading plate (4); a plurality of evenly arranged vibrating rods (11) are fixedly installed on the side wall of the L-shaped spreading plate (4).

9. The device for controlling the flatness of prefabricated box girders of unequal spans according to claim 3, characterized in that: The scraper (6) is located directly above the L-shaped spreading plate (4), and the scraper (6) includes an arc-shaped portion (601). The inner wall of the arc-shaped portion (601) is slidably connected to the outer wall of the turning point between the side V elastic portion (504) and the inclined transition portion (505). The scraper (6) also includes a strip plate (602) arranged at the bottom of the arc-shaped portion (601); a rotating rod (12) is rotatably installed on the side wall between the two side plates (3) through a connecting shaft, and the outer wall of the rotating rod (12) is fixedly connected to a plurality of rubber rods (1201), and the end of the rubber rod (1201) is fixedly connected to a rubber head (1202) for knocking the inner wall above the side V elastic portion (504); one end of the rotating rod (12) is fixedly connected to a small gear (1203), and the small gear (1203) is meshed with a large gear (1204) axially connected to one end of the driving roller (9).

10. A method for using a device for controlling the flatness of prefabricated box girders of unequal spans, characterized in that: The device for controlling the flatness of prefabricated box girders of unequal spans according to any one of claims 1 to 9 comprises the following steps: S1, the prefabricated box beam is cast below the circulating belt (5), the XYZ three-axis driving mechanism (1) drives the circulating belt (5) to descend, and the bottom of the circulating belt (5) descends to the height required for leveling; S2, the circulating belt (5) is running, and the XYZ three-axis driving mechanism (1) drives the circulating belt (5) to move in the X-axis direction and move toward the front of the L-shaped spreading plate (4), and the L-shaped spreading plate (4) scoops up the concrete above the bottom of the L-shaped spreading plate (4); at the same time, its bottom performs preliminary flattening of the concrete; S3, the XYZ three-axis driving mechanism (1) drives the shaking part (503) to move onto the initially flattened concrete, the shaking part (503) presses the concrete, and shakes the concrete below it to press out the bubbles and precipitate the moisture on the surface of the concrete; S4, the XYZ three-axis driving mechanism (1) drives the circulating belt (5) to move to the leveling part (501) to move to the shaken concrete for final leveling; S5, as the circulating belt (5) runs, the circulating belt (5) runs from the shaking portion (503) to the side V elastic portion (504), and then runs to the turning point between the side V elastic portion (504) and the inclined transition portion (505), and the scraper (6) scrapes off the concrete adhered to the circulating belt (5), and drops it into the L-shaped spreading plate (4); S6, the scraped clean circulating belt (5) then runs to the inclined transition part (505) and the flattening part (501) in sequence.

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