Unequal span prefabricated box girder flatness control device and use method

Abstract

The application discloses a kind of unequal span prefabricated box girder flatness control device and use method, including XYZ three-axis drive mechanism, XYZ three-axis drive mechanism is driven and installed with U-shaped frame, the inner wall of U-shaped frame is fixedly connected with the two side plates of symmetrical arrangement, L-shaped spreading plate and circulating belt are installed between two side plates;The bottom of circulating belt is sequentially provided with leveling portion, inverted V elastic spacing portion and shaking portion, and the side upper side of its located in shaking portion is provided with side V elastic portion, and the upper side thereof is provided with inclined transition portion connected with side V elastic portion, leveling portion;The outer wall of the turning portion between circulating belt located in side V elastic portion and inclined transition portion is installed with scraper, and the application relates to the technical field of prefabricated box girder.The present application solves the problem that the concrete surface moisture is disordered in the traditional prefabricated box girder leveling process, which causes the adhesion of leveling tool, and the discontinuous leveling operation and the difficulty in reaching the standard of flatness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated box girder, in particular to a flatness control device for prefabricated box girder with unequal span and a use method thereof. BACKGROUND

[0002] In the production of prefabricated box girder, the flatness of the concrete surface directly affects the overall quality of the box girder. At present, there are many technical bottlenecks in the leveling process of prefabricated box girder. In the traditional leveling operation, due to the lack of scientific and reasonable moisture control mechanism, the moisture distribution on the surface of the concrete is in a disordered state. When the leveling tool contacts the concrete, the surface moisture cannot play the role of auxiliary lubrication, but due to uneven distribution, it causes excessive moisture in some areas, changes the fluidity of the concrete, and the leveling tool is deeply stuck in it and adheres a large amount of concrete; the moisture in some areas is too little, which leads to excessive friction between the concrete and the leveling tool, and the concrete is also adhered 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 the concrete adhered to the leveling tool, which not only greatly reduces the work efficiency, but also in the process of repeated cleaning and rework, it is difficult to ensure that the flatness of the concrete surface is always the same, and it is easy to produce high and low undulations, roughness and other defects, which cannot meet the strict standards of modern construction engineering for prefabricated box girder with high precision and high flatness.

[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, but it has not been able to effectively solve the contradiction between the adhesion of the concrete surface moisture and the leveling tool. Therefore, the development of a prefabricated box girder flatness control device that can control the moisture on the surface of the concrete, prevent the adhesion of the leveling tool by means of moisture precipitation, and achieve efficient and high-precision leveling effect, has become a key technical problem that needs to be broken through in the field of prefabricated box girder production. The present application is based on this technical background and is born in response to it, 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

[0005] In order to solve the problem that the disordered moisture on the surface of the concrete in the traditional prefabricated box girder leveling process causes the adhesion of the leveling tool, and the resulting discontinuity of the leveling operation and the difficulty in meeting the flatness standards, the purpose of the present application is to provide a flatness control device for prefabricated box girder with unequal span and a use method thereof.

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

[0007] The bottom of the circulating belt is sequentially provided with a leveling portion, an inverted V-shaped elastic spacing portion and a shaking portion, a side V-shaped elastic portion is arranged above the side of the shaking portion, and an inclined transition portion is arranged above the side V-shaped elastic portion and connected with the side V-shaped elastic portion and the leveling portion;

[0008] An scraper is mounted on the outer wall of the circulating belt at the turning portion between the side V-shaped elastic portion and the inclined transition portion.

[0009] Preferably, the XYZ three-axis driving mechanism comprises two X-axis linear motors symmetrically arranged, two Z-axis hydraulic cylinders fixedly mounted on two transmission tables of the two X-axis linear motors, a Y-axis linear motor fixedly mounted on the top of the extension end of the two Z-axis hydraulic cylinders, and the bottom of the transmission end of the Y-axis linear motor is fixedly connected with the top of the U-shaped frame.

[0010] Preferably, the inner wall of the circulating belt is engaged 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 engaged with the inner wall at the turning portion between the side V-shaped elastic portion and the inclined transition portion; the supporting rollers and the driving roller are rotatably mounted on the side wall of the side plate, a first motor is fixedly mounted on the side wall of the side plate, and the output end of the first motor is shaft-connected with one end of the driving roller.

[0011] Preferably, a circular hole is formed in the side wall of the side plate, and a driving disc is rotatably sleeved on the inner wall of the circular hole; a second motor is fixedly mounted on the inner side wall of the driving disc and shaft-connected with the center of the driving disc, a driving shaft is fixedly connected with the end face of the driving disc in an eccentric manner, an oscillating plate is rotatably mounted on the outer side wall of the side plate through a connecting shaft, the end portions of the two shaking rollers are rotatably mounted on the side wall of the oscillating plate through the connecting shaft, a rectangular block is fixedly connected to the top of the oscillating plate, a strip-shaped hole is vertically formed in the side wall of the rectangular block, and the driving shaft is slidingly connected with the inner wall of the strip-shaped hole; two arc-shaped openings are symmetrically and vertically formed in the side wall of the side plate close to the bottom, and the shaking rollers movably pass through the arc-shaped openings.

[0012] Preferably, two elastic supporting mechanisms are mounted on the side plate, each of the elastic supporting mechanisms comprises a fixed rod, an activity block is slidingly sleeved on the outer wall of the fixed rod, a supporting column is rotatably mounted on the side wall of the activity block, and a spring is sleeved on the outer wall of the fixed rod and abuts against the activity block.

[0013] The side wall of the side plate is provided with a vertical rectangular hole, the fixed rod is vertically and fixedly connected to the inner wall of the vertical rectangular hole, the two side walls of the movable block are slidably connected to the two inner walls of the vertical rectangular hole, and the outer wall of the supporting column is vertically and upwardly supported on the outer wall of the circulating belt and used for forming an inverted V-shaped elastic spacing part.

[0014] The inside of the circulating belt is fixedly provided with a plurality of reinforcing ribs.

[0015] Preferably, the side wall of the side plate is provided with a horizontal rectangular hole, the fixed rod is horizontally and fixedly connected to the inner wall of the horizontal rectangular hole, the two side walls of the movable block are slidably connected to the upper and lower inner walls of the horizontal rectangular hole, and the outer wall of the supporting column is horizontally supported on the outer wall of the circulating belt and used for forming a side V-shaped elastic part.

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

[0017] Preferably, the upper side of one end of the L-shaped leveling plate is vertically chamfered, the corner of the L-shaped leveling plate is provided with an arc-shaped turning, the side wall of the side plate is fixedly provided with a third motor, the output shaft of the third motor is connected with a screw flight blade arranged in the L-shaped leveling plate, the outer wall of the screw flight blade is slidably connected with the inner wall of the arc-shaped turning of the corner of the L-shaped leveling plate, the side plate away from the third motor is provided with a circular discharge port, the axis of the circular discharge port coincides with the axis of the arc-shaped turning of the corner of the L-shaped leveling plate, and the side wall of the L-shaped leveling plate is fixedly provided with a plurality of vibrating rods arranged uniformly.

[0018] Preferably, the scraper is located directly above the L-shaped leveling plate, the scraper comprises an arc-shaped part, the inner wall of the arc-shaped part is slidably connected with the outer wall of the turning between the side V-shaped elastic part and the inclined transition part, and the scraper further comprises a strip-shaped plate arranged at the bottom of the arc-shaped part. The side wall between the two side plates is rotatably provided with a rotating rod through a connecting shaft, the outer wall of the rotating rod is fixedly connected with a plurality of rubber rods, the end of the rubber rod is fixedly connected with a rubber head, and the rubber head is used for knocking the inner side wall above the side V-shaped elastic part. The one end of the rotating rod is fixedly connected with a small gear, and the small gear is engaged with a large gear connected with the one end of the driving roller.

[0019] A method for using a flatness control device for a prefabricated box girder with unequal spans, comprising the following steps:

[0020] S1, the prefabricated box girder is poured below the circulating belt, the XYZ three-axis driving mechanism drives the circulating belt to descend, and the bottom of the circulating belt is lowered 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 towards the front of the L-shaped leveling plate, and the L-shaped leveling plate scoops up the concrete higher than the bottom of the L-shaped leveling plate; meanwhile, the bottom thereof preliminarily levels the concrete;

[0022] S3, the XYZ three-axis driving mechanism drives the shaking part to move to the preliminarily spread concrete, the shaking part compresses and shakes the concrete below, the bubbles are pressed out, and the water on the surface of the concrete is separated out at the same time;

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

[0024] S5, with the running of the circulating belt, the concrete adhered to the circulating belt is scraped off at the turning position between the side V elastic part and the inclined transition part, and falls into the L-shaped spreading plate;

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

[0026] Compared with the prior art, the beneficial effects realized by the present application are:

[0027] 1、The present application, by shaking the concrete through the shaking part, not only shakes out the bubbles, but also separates out the water on the surface of the concrete, so that the leveling part does not adhere to the concrete, and the leveling is smoother.

[0028] 2、The present application, by sequentially arranging the leveling part, the inverted V elastic interval part, the shaking part, the side V elastic part and the inclined transition part at the bottom of the circulating belt, the circulating and cooperative work realizes the leveling control of the surface flatness of the prefabricated box girder concrete.

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

[0030] 4、The present application, the chamfer vertical design and the arc turning corner of the L-shaped spreading plate, and the cooperative work of the inner auger blade and the circular discharge port, make the accumulated concrete push to the side which has not been leveled. At the same time, the several vibrating rods installed on the side wall of the L-shaped spreading plate vibrate the concrete during work, further improve the compactness of the concrete, optimize the treatment effect of the concrete, thereby improving the overall quality of the prefabricated box girder.

[0031] 5、The present application, by arranging the inverted V elastic interval part and the side V elastic part, the shaking part has enough space when shaking, and the inverted V elastic interval part separates the leveling part and the shaking part, avoiding the influence of the shaking part on the leveling work of the leveling part. BRIEF DESCRIPTION OF DRAWINGS

[0032] The present application will be further described in detail by the following drawings and embodiments:

[0033] Figure 1 The structural schematic diagram of the whole of the present application;

[0034] Figure 2 The structural schematic diagram of the circulating belt of the present application;

[0035] Figure 3 The structural schematic diagram of one side of the circular discharge port of the present application;

[0036] Figure 4 The structural schematic diagram of the circulating belt of the present application;

[0037] Figure 5 The structural schematic diagram of the elastic supporting mechanism of the present application;

[0038] Figure 6 The structural schematic diagram of the swinging plate of the present application;

[0039] Figure 7 The structural schematic diagram of the side plate of the present application.

[0040] In the drawings: 1, XYZ three-axis driving mechanism; 2, U-shaped frame; 3, side plate; 4, L-shaped flattening plate; 5, circulating belt; 6, scraper; 7, supporting roller; 8, swinging 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, flattening part; 502, inverted V-shaped elastic spacing part; 503, swinging part; 504, side V-shaped elastic part; 505, inclined transition part; 901, first motor; 801, driving disc; 802, second motor; 803, driving shaft; 804, swinging plate; 805, rectangular block; 806, strip-shaped hole; 301, arc-shaped opening; 1001, fixed rod; 1002, movable block; 1003, supporting column; 1004, spring; 302, vertical rectangular hole; 303, horizontal rectangular hole; 304, circular discharge port; 401, third motor; 402, auger blade; 601, arc-shaped part; 602, strip-shaped plate; 1201, rubber rod; 1202, rubber head; 1203, pinion; 1204, gear. DETAILED DESCRIPTION

[0041] The embodiments of the present application will be described in detail by the following specific embodiments, and other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the specification.

[0042] Please refer to Figures 1 to 7It is to be understood that the structures, proportions, sizes, etc. shown in the drawings accompanying the present specification are merely intended to assist in understanding and reading the present disclosure by those skilled in the art, and are not intended to limit the conditions under which the present application can be implemented, and therefore do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, shall still fall within the scope of the present disclosure.

[0043] The present application provides a technical solution: a non-equal span prefabricated box girder flatness control device, 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 formwork. The X-axis linear motor 101 can accurately control the displacement in the X-axis direction, and provides 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 installed on the transmission tables of the two X-axis linear motors 101. The Z-axis hydraulic cylinder 102 can adjust the height in the vertical direction through the telescopic adjusting device to adapt to the needs of different pouring 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 transmission end bottom of the Y-axis linear motor 103 is fixedly connected with the top of the U-shaped frame 2, and the main function is to meet the leveling operation of the non-equal span prefabricated box girder in the length direction. Through the adjustment of the Y-axis linear motor 103, flexible operation on prefabricated box girders of different spans can be realized.

[0044] The U-shaped frame 2 serves as the bearing frame of the entire device, and the inner wall thereof is fixedly connected with two symmetrically arranged side plates 3. The side plates 3 provide a mounting basis for various components installed subsequently. The bottom of the side plate 3 is higher than the bottom of the L-shaped leveling plate 4, and such design can ensure that the side plate 3 does not interfere with the leveling operation of the L-shaped leveling plate 4 on the concrete during the working process of the device, and at the same time, can protect the side plate 3 from excessive impact and wear of the concrete.

[0045] The L-shaped screed plate 4 is installed between the two side plates 3. The upper part of the lower end is designed with a chamfered vertical design, which helps to make the concrete more smooth when it is scooped up, reducing the resistance of the concrete to the screed plate. The corner of the L-shaped screed plate 4 is designed with an arc-shaped turning, which can avoid the accumulation of concrete at the corner, making the flow of concrete in the screed plate more smooth. The third motor 401 is fixedly installed on the side wall of the side plate 3, and the output shaft of the third motor 401 is connected with the auger blade 402 arranged inside the L-shaped screed plate 4. The outer wall of the auger blade 402 is slidably connected with the inner wall of the arc-shaped turning of the corner of the L-shaped screed plate 4. The third motor 401 drives the rotation of the auger blade 402, which can push the concrete in the L-shaped screed plate 4 out of the circular discharge port 304. The side plate 3 away from the third motor 401 is provided with a circular discharge port 304, and the axis of the circular discharge port 304 coincides with the axis of the arc-shaped turning of the corner of the L-shaped screed plate 4. Such design can ensure that the concrete is uniformly pushed out of the discharge port, providing a stable source of concrete for subsequent screeding work. In addition, a plurality of vibrating rods 11 are fixedly installed on the side wall of the L-shaped screed plate 4. The vibrating rods 11 can vibrate the concrete during work, further improving the compactness and flatness of the concrete.

[0046] The circulating belt 5 is also installed between the two side plates 3, and the bottom has a unique structural design. The leveling portion 501, the inverted V-shaped elastic spacing portion 502 and the shaking portion 503 are arranged in sequence, the side V-shaped elastic portion 504 is arranged on the side of the shaking portion 503, and the inclined transition portion 505 connected with the side V-shaped elastic portion 504 and the leveling portion 501 is arranged above the side V-shaped elastic portion 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. The leveling portion 501 is located between the two supporting rollers 7, and when the concrete is finally leveled, the smooth surface of the leveling portion 501 can compact and smooth the surface of the concrete. The shaking portion 503 is located between the two shaking rollers 8, and when the concrete is shaken, the shaking portion 503 is shaken by the swinging of the two shaking rollers 8, so as to press out the bubbles in the concrete and make the water on the surface of the concrete. The driving roller 9 is engaged with the inner wall of the turning portion between the side V-shaped elastic portion 504 and the inclined transition portion 505, and is driven by the first motor 901 fixedly installed on the side wall of the side plate 3. The output end of the first motor 901 is connected with one end of the driving roller 9, which provides power for the operation of the circulating belt 5.

[0047] The arrangement of the inverted V-shaped elastic spacing portion 502 and the side V-shaped elastic portion 504 provides sufficient space for the shaking of the shaking portion 503, and the inverted V-shaped elastic spacing portion 502 separates the leveling portion 501 and the shaking portion 503, avoiding the influence of the shaking of the shaking portion 503 on the leveling work of the leveling portion 501.

[0048] The scraper 6 is installed on the outer wall of the turning part between the side V elastic part 504 and the inclined transition part 505 of the circulating belt 5. The scraper 6 comprises an arc-shaped part 601, the inner wall of which is in sliding connection with the outer wall of the turning part between the side V elastic part 504 and the inclined transition part 505, so as to effectively scrape the concrete adhered to the circulating belt 5. The scraper 6 further comprises a strip-shaped 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 installed 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 formed in the side wall of the side plate 3, and the inner wall of the circular hole rotatably sleeves the driving disc 801. The inner side wall of the driving disc 801 fixedly installs the second motor 802 which is axially connected with the center of the driving disc 801, and the end surface of the driving disc 801 eccentrically fixedly connects the driving shaft 803. The outer side wall of the side plate 3 rotatably installs the swing plate 804 through a connecting shaft, the ends of the two shaking rollers 8 are rotatably installed on the side wall of the swing plate 804 through a connecting shaft, the top of the swing plate 804 fixedly connects the rectangular block 805, the side wall of the rectangular block 805 vertically forms the strip-shaped hole 806, and the driving shaft 803 is in sliding connection with the inner wall of the strip-shaped hole 806. The side wall of the side plate 3 close to the bottom forms two symmetrical vertical arc-shaped openings 301, and the shaking roller 8 moves through the arc-shaped opening 301. When the second motor 802 drives the driving disc 801 to rotate, the driving shaft 803 moves in a circular track and slides in the strip-shaped 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 realize the shaking operation on the concrete below the shaking part 503.

[0050] Two elastic support mechanisms 10 are installed on the side plate 3 and used for forming the inverted V-shaped elastic spacing part 502 and the side V-shaped elastic part 504. The elastic support mechanism 10 comprises 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 installed with a supporting column 1003, and the outer wall of the fixed rod 1001 is sleeved with a spring 1004 abutting against the movable block 1002. For forming the inverted V-shaped elastic spacing part 502, the side wall of the side plate 3 is provided with a vertical rectangular hole 302, the fixed rod 1001 is vertically and 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 inner walls of the vertical rectangular hole 302, and the outer wall of the supporting column 1003 is vertically and upwardly supported to the outer wall of the circulating belt 5. During the operation of the circulating belt 5, the supporting column 1003 can flexibly adjust the supporting force according to the pressure of the concrete and the deformation of the circulating belt 5 under the action of the spring 1004, so as to form the inverted V-shaped elastic spacing part 502. For forming the side V-shaped elastic part 504, the side wall of the side plate 3 is provided with a horizontal rectangular hole 303, the fixed rod 1001 is horizontally and fixedly connected to the inner wall of the horizontal rectangular hole 303, the two side walls of the movable block 1002 are slidably connected to the upper and lower inner walls of the horizontal rectangular hole 303, and the outer wall of the supporting column 1003 is horizontally supported to the outer wall of the circulating belt 5. Similarly, under the action of the spring 1004, the side V-shaped elastic part 504 is formed. In addition, a plurality of reinforcing ribs are fixedly penetrated in the inside of the circulating belt 5, so as to avoid the deformation and falling of the supporting column 1003 when supporting the circulating belt 5, and ensure the structural stability and service life of the circulating belt 5.

[0051] The side wall between the two side plates 3 is rotatably installed with a rotating rod 12 through a connecting shaft, 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 engaged with a large gear 1204 shaft-connected with one end of the driving roller 9. When the driving roller 9 rotates, the large gear 1204 drives the small gear 1203 to rotate, and then the rotating rod 12 rotates, so that the rubber head 1202 constantly knocks the inner side wall above the side V-shaped elastic part 504, knocks off the concrete adhered to the circulating belt 5, and further improves the cleaning effect of the circulating belt 5, avoiding the influence of the residual concrete on the circulating belt on the subsequent operation.

[0052] A use method of a non-equal-span prefabricated box girder flatness control device

[0053] Step 1, the device is in place

[0054] When pouring the prefabricated box girder, two X-axis linear motors 101 are arranged on both sides of the prefabricated box girder formwork. Start the XYZ three-axis drive mechanism 1, and drive the circulating belt 5 down through the Z-axis hydraulic cylinder 102 until the bottom of the circulating belt 5 is lowered to the required height for leveling. During this process, the height of the circulating belt 5 needs to be adjusted accurately according to the design requirements of the prefabricated box girder and the actual pouring situation to ensure that the subsequent leveling operation can achieve the desired effect.

[0055] Step 2, preliminary flattening:

[0056] Start the first motor 901 to drive the drive 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 towards the front of the L-shaped leveling plate 4. During the movement, the L-shaped leveling plate 4 scoops up the concrete higher than the bottom of the L-shaped leveling 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 leveling plate 4 out from 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, attention needs to be paid to controlling the moving speed of the circulating belt 5 and the scooping height of the L-shaped leveling plate 4, as well as the rotation speed of the auger blade 402, to ensure that the preliminary 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. During this process, start the second motor 802, which makes the drive disc 801 rotate, the drive shaft 803 runs in a circular trajectory, slides in the strip-shaped 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, thereby making the shaking part 503 realize shaking. Through the shaking operation, the bubbles in the concrete can be pressed out, and the water on the surface of the concrete can be separated. These separated 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, the rotation speed of the second motor 802 and the shaking amplitude of the shaking part 503 need to be adjusted reasonably according to the characteristics of the concrete and the pouring thickness to achieve the best shaking effect.

[0059] Step 4, final leveling:

[0060] The XYZ three-axis driving mechanism 1 drives the circulating belt 5 to move, so that the leveling part 501 moves to the final leveling of the shaken concrete. Because water is separated from 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 more smoothly compacted and smoothed, further improving the flatness of the concrete. In this step, the moving speed of the circulating belt 5 should be uniform and stable, so that the leveling part 501 can fully and carefully level the concrete.

[0061] Step 5, cleaning of the circulating belt:

[0062] With the operation of the circulating belt 5, 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 of the pinion gear 1203 and the gear 1204, so that the rubber head 1202 constantly knocks the inner side 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 part 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 falls into the L-shaped spreading 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, avoiding the influence of the residual concrete on the circulating belt on the subsequent operation. In this step, the rotation speed of the rotating rod 12 and the scraping force of the scraper 6 should be moderate, which can effectively clean the circulating belt 5 without damaging the circulating belt 5.

[0063] Step 6, circulating operation:

[0064] The cleaned circulating belt 5 runs to the inclined transition part 505 and the leveling part 501 in turn, and continues the next round of leveling operation. This cycle is repeated until the flatness control operation of the entire prefabricated box girder is completed. During the entire operation process, the running state of the device needs to be monitored in real time, and the rotation speed of each motor, the moving speed and position of the XYZ three-axis driving mechanism 1 and other parameters are adjusted according to the actual situation, to ensure that the flatness of the prefabricated box girder meets the design requirements.

[0065] Through the detailed description of the above specific embodiments, the unequal-span prefabricated box girder flatness control device and the use method thereof can effectively improve the flatness of the prefabricated box girder, have the advantages of simple operation, high efficiency, good leveling effect, etc., and have a broad application prospect in the production field of prefabricated box girders.

[0066] The above embodiments are only illustrative of the principles of the present application and its efficacy, and are not intended to limit the present application. Any modification or change made by any person skilled in the art without departing from the spirit and scope of the present application shall be covered by the claims of the present application.

Claims

1. A device for controlling the flatness of prefabricated box girders of unequal spans, comprising an XYZ three-axis drive mechanism (1), characterized in that: A U-shaped frame (2) is installed on the XYZ three-axis drive mechanism (1), and the inner wall of the U-shaped frame (2) is fixedly connected to 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 portion (504) and the inclined transition portion (505); 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), and is used to form an inverted V 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 connected inside the circulating belt (5); 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 portion (504); The rocking 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); The upper part of one end below 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 turning. The side wall of the side plate (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 turning corner of the L-shaped spreading plate (4). 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 turning corner of the L-shaped spreading plate (4); and a plurality of evenly arranged vibrating rods (11) are fixedly installed on the side wall of the L-shaped spreading plate (4).

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 drive mechanism (1) comprises two symmetrically arranged X-axis linear motors (101), two Z-axis hydraulic cylinders (102) are fixedly mounted on two transmission platforms on the two X-axis linear motors (101), a Y-axis linear motor (103) is fixedly mounted on the top of the telescopic ends of the two Z-axis hydraulic cylinders (102), 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 engaged 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 engaged 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, characterized in that: The side wall of the side plate (3) is provided with a circular hole, and the inner wall of the circular hole is rotatably sleeved with a driving disk (801); the inner wall of the driving disk (801) is fixedly provided with a second motor (802) connected to the center of the driving disk (801), and the end face of the driving disk (801) is eccentrically fixedly connected with a driving shaft (803); the outer wall of the side plate (3) is rotatably provided with a swing plate (804) through a connecting shaft, and the ends of the two shaking rollers (8) are rotatably provided with the side wall of the swing plate (804) through a connecting shaft, and the top of the swing plate (804) is fixedly provided with a rectangular block (805), and the side wall of the rectangular block (805) is vertically provided with a strip hole (806), 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).

5. 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). 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). The side wall between the two side plates (3) is rotatably mounted with a rotating rod (12) via a connecting shaft. The outer wall of the rotating rod (12) is fixedly connected to a plurality of rubber rods (1201). The ends of the rubber rods (1201) are fixedly connected to rubber heads (1202) for striking 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). The small gear (1203) is meshed with a large gear (1204) axially connected to one end of the driving roller (9).

6. 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 a prefabricated box girder with unequal spans according to any one of claims 1 to 5 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 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 leveling 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 bubbles and simultaneously precipitate 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 concrete after shaking 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 adhering 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 portion (505) and the leveling portion (501) in sequence.

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