Monitoring system and method during box girder prefabrication casting process

Abstract

The present invention relates to the field of beam box casting monitoring technology, and in particular to a monitoring system and method in the process of prefabricated box beam casting, comprising at least four support frames that can be installed on the outside of an outer mold, the top end of the support frame is rotatably connected to an outer rod, the outer rod can be parallel to one side of the outer mold by adjusting the angle, and a rise measurement component is arranged on the outer rod, the rise measurement component comprises a piston, the piston is slidably connected to the inner side of the outer rod, the bottom end of the piston is fixedly connected to an inner rod, and the bottom end of the inner rod is fixedly connected to a floating plate. The present invention can directly determine whether there is a height difference in concrete in the casting space through a relatively simple structure, greatly shortening the time interval from the occurrence of height deviation to the discovery of height deviation and then to the completion of adjustment during concrete casting, ensuring the molding quality of the box beam, and preventing the phenomenon of template instability due to center of gravity offset and the problem of easy inclination of the inner mold when the concrete height in the casting space is inconsistent.

Description

Technical Field

[0001] The invention relates to the technical field of beam box casting monitoring, and in particular to a monitoring system and method in a box beam prefabrication casting process. Background Art

[0002] like Figure 1 As shown, in the process of pouring the box beam, an outer mold 1 and an inner mold 2 are needed, and a pouring space 3 for forming the box beam is formed between the outer mold 1 and the inner mold 2. Because the pouring point is a fixed point setting and the flow of concrete has a certain viscosity, during the pouring of the box beam, the concrete height in the pouring space 3 will be inconsistent, especially when the heights on the left and right sides are inconsistent. When this difference is too large, it is easy to cause the template to become unstable due to the offset of the center of gravity;

[0003] At the same time, during the pouring of the box girder, the concrete poured in the pouring space 3 is in a fluid state and has a certain buoyancy, which acts on the inner mold 2. When the height of the concrete in the pouring space 3 is inconsistent, especially when the heights on the left and right sides are inconsistent, when this difference is too large, it is easy to cause the inner mold to tilt, thereby causing problems in the template forming;

[0004] Therefore, it is necessary to monitor the height of the poured concrete at different positions in the pouring space 3 in a timely manner during the pouring of the box girder. Because the fluid concrete is dark in color and has a rough surface, the existing optical detection method will have a large error. After the concrete height in the pouring space is monitored at multiple points, it is necessary to sort out the data for comparison to obtain the error value, which will lead to untimely adjustments after monitoring.

[0005] The present invention can directly determine whether there is a height difference in the concrete in the pouring space through a relatively simple structure, which greatly shortens the time interval from the occurrence of height deviation to the completion of adjustment during concrete pouring.

[0006] Therefore, in order to solve the above problems, a monitoring system and method for the prefabrication and casting process of box beams are proposed. Summary of the invention

[0007] The purpose of the present invention is to provide a monitoring system and method for the prefabrication and pouring process of box girders, which can directly determine whether there is a height difference in the concrete in the pouring space through a relatively simple structure, thereby greatly shortening the time interval from the occurrence of height deviation to the completion of adjustment during concrete pouring.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a monitoring system for the prefabrication casting process of a box beam, comprising at least four support frames that can be installed on the outside of an outer mold. For ease of installation, the support frames can also be arranged to be height-adjustable. The height-adjustable is a prior art and will not be elaborated on here. The top of the support frame is rotatably connected to an outer rod, and the outer rod can be parallel to one side of the outer mold by adjusting the angle. A rise measurement assembly is arranged on the outer rod, and the rise measurement assembly comprises a piston, and the piston is slidably connected to the inner side of the outer rod. The bottom end of the piston is fixedly connected to an inner rod, and the bottom end of the inner rod is fixedly connected to a floating plate. The inner rod and the floating plate can move in the casting space, and the rising distance of the casting liquid level is obtained by obtaining the moving distance of the floating plate.

[0009] The top end of the outer rod is rotatably connected to a support plate, the top end of the support plate is fixedly connected to a limit rod, the outer side of the limit rod is slidably connected to a sliding plate, the sliding plate can move up and down, and the sliding plate rises a corresponding distance according to the moving distance of the piston during the pouring process;

[0010] A limiting groove is provided in the middle position of the sliding plate, and a wire-paying drum is fixedly connected to the outer side of the sliding plate at one corner position, and a pulling assembly is provided on the inner side of the wire-paying drum. During the pouring process, when the concrete in the pouring space rises synchronously, multiple sliding plates rise synchronously, and the movable parts in the pulling assembly will not be pulled out. When the concrete in the pouring space rises asynchronously, multiple sliding plates rise asynchronously, and the movable parts in the pulling assembly will be pulled out, thereby realizing the monitoring of the pouring surface.

[0011] The present invention can directly determine whether there is a height difference in concrete in the pouring space through a relatively simple structure, which greatly shortens the time interval from the occurrence of height deviation to the discovery of height deviation and then to the completion of adjustment during concrete pouring, ensures the forming quality of the box girder, and can prevent the phenomenon of formwork instability due to center of gravity offset and the problem of easy tilt of the inner mold due to inconsistent concrete height in the pouring space.

[0012] Under the above settings, when the present invention is used, first, multiple support frames are installed on the outside of the outer mold in turn, wherein four support frames are installed at the four corners of the outer mold, the angle of the outer rod is adjusted to make it parallel to the outer side of the outer mold at the corresponding position, and the angle of the support plate is adjusted to keep it parallel to the ground, multiple sliding plates rise synchronously, and the movable parts in the pull-out assembly will not be pulled out. When the concrete in the casting space rises asynchronously, multiple sliding plates rise asynchronously, and the movable parts in the pull-out assembly will be pulled out, thereby realizing the monitoring of the casting surface. This monitoring method can be intuitively observed by the naked eye on site, thereby effectively reducing the time gap of the correction operation.

[0013] As a monitoring system in the process of prefabrication and pouring of box beams, preferably, a potentiometer is fixedly connected to the inner side of the outer rod, a slider is fixedly connected to the inner side of the piston, the slider slides on the potentiometer, and the moving distance of the floating plate and the piston during the pouring process is obtained through the potentiometer;

[0014] The moving distance of the floating plate and the piston during the pouring process can be obtained by the potentiometer. When the concrete is poured, the concrete liquid level rises, and the floating plate drives the inner rod and the slider in the piston to move. The moving distance of the slider is obtained by the potentiometer to obtain the moving distance of the floating plate;

[0015] The above structure can also be used to obtain the actual rising height of the concrete at that location. The actual rising height of the concrete is coscy, where angle c is the angle formed by the inner rod and the plumb line after adjustment, and y is the moving distance of the floating plate. The height of the pouring liquid surface can be grasped during the monitoring process.

[0016] Preferably, as a monitoring system during the prefabrication and casting process of the box girder, a motor is fixedly connected to the inner side of the top end of the support plate, a screw is fixedly connected to the end of the main shaft of the motor, and the outer side of the screw is spirally connected to the inner side of the sliding plate, so that the upward or downward movement of the sliding plate is achieved through the rotation of the motor.

[0017] After the floating plate moves, the sliding plate can be raised to the same height as the moving distance of the floating plate by the rotation of the motor;

[0018] Preferably, the pulling assembly comprises a fixed shaft, the outer side of the fixed shaft is fixedly connected with a spring, the other end of the spring is fixedly connected with a rotating drum, the outer side of the rotating drum is wound with a pulling rope, the pulling rope does not have a telescopic property, the spring is used to make the pulling rope straight and play a role of distance compensation, the pulling rope is the movable part in the pulling assembly, the other end of the pulling rope is embedded in the limiting grooves of the remaining sliding disks in a counterclockwise or clockwise direction in turn, and the other end of the pulling rope finally returns to and is fixed on the sliding disk where the wire pay-off drum is located. During the pouring process, when the concrete in the pouring space rises synchronously, multiple sliding disks rise synchronously, and the heights of adjacent sliding disks are consistent. The pulling rope on the rotating drum will not be pulled out, and the rotating drum is in a stationary state. When the concrete in the pouring space rises asynchronously, multiple sliding disks rise asynchronously, and there are adjacent sliding disks. In case of inconsistent heights between the disks, the pull rope on the drum will be pulled out, and the drum will rotate, thereby realizing monitoring of the casting surface. A turn counter is fixedly connected to the outer side of the pay-off drum, and the input end of the turn counter penetrates into the inner side of the pay-off drum and is fixedly connected to the solid end of the drum, for obtaining the length of the pull rope when it is pulled out. In order to increase the sensitivity of the turn counter to the rotation of the drum when the pull rope is pulled out, the present invention can set a reducer between the drum and the turn counter, the input end of the turn counter is connected to the input end of the reducer, and the drum is connected to the output end of the reducer, so that when the drum rotates, the turn counter can count more turns, realizing sensitive and effective monitoring, and avoiding the problem that when the span of adjacent sliding disks is far and the height difference is small, the pull rope is pulled out The distance is weak and inconvenient to display, and the reducer is a gear reducer;

[0019] Preferably, as a monitoring system during the prefabrication and casting process of the box girder, the upper side of the support frame is rotatably connected to a first electric push rod via a hinge, and the movable end of the first electric push rod is rotatably connected to the outer side of the outer rod via a hinge. The angle of the outer rod is adjusted by telescoping the first electric push rod so that the outer rod is parallel to the outer side of the outer mold.

[0020] As a monitoring system during the prefabrication and casting process of the box girder, the bottom end of the support plate is preferably connected to a second electric push rod via a hinge, and the other end of the second electric push rod is connected to the outer side of the upper end of the outer rod via a hinge. The support plate is kept in a horizontal state by extending and retracting the second electric push rod and referring to a spirit level.

[0021] As a monitoring system in the process of precast box beam casting, preferably, a tilt sensor is slidably connected to the pull rope between two adjacent sliding plates to identify the height comparison between the two adjacent sliding plates.

[0022] When determining that there are differences in the pouring liquid levels at different locations during the pouring process, the specific locations of the difference points can be further determined by observing the tilt sensor;

[0023] As a monitoring system during the precast casting process of the box girder, preferably, the other end of the pull rope is fixedly connected to a connecting buckle, and the other end of the pull rope is detachably connected to the sliding plate where the pay-off drum is located through the connecting buckle.

[0024] During the installation process, the pull rope can be knotted to achieve the function of pull rope distance compensation, and the other end of the pull rope can be detachably connected to the sliding plate where the pay-off drum is located through the connecting buckle to facilitate the installation;

[0025] The monitoring method during the prefabrication and pouring of box beams comprises the following steps:

[0026] Step 1: Install multiple support frames on the outside of the outer mold in sequence, where four support frames are installed at the four corners of the outer mold;

[0027] Step 2: Adjust the angle of the outer rod to make it parallel to the outer side of the corresponding outer mold, and adjust the angle of the support plate to keep it parallel to the ground;

[0028] Step 3: During the pouring process, when the concrete in the pouring space rises synchronously, multiple slides rise synchronously, the pull rope on the rotating drum will not be pulled out, and the rotating drum will be in a stationary state. When the concrete in the pouring space rises asynchronously, multiple slides rise asynchronously, the pull rope on the rotating drum will be pulled out, and the rotating drum will rotate, thereby realizing the monitoring of the pouring surface.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The monitoring system of the box girder prefabrication casting process can directly determine whether there is a height difference of concrete in the casting space through a relatively simple structure, which greatly shortens the time interval from the occurrence of height deviation to the discovery of height deviation and then to the completion of adjustment during concrete casting, ensures the molding quality of the box girder, and can prevent the phenomenon of template instability due to center of gravity offset and the problem of inner mold tilting caused by inconsistent concrete height in the casting space.

[0031] 2. The monitoring system during the prefabrication and pouring process of the box girder, when the present invention is used, firstly, a plurality of support frames are respectively installed on the outside of the outer mold in sequence, wherein four support frames are installed at the four corners of the outer mold, the angle of the outer rod is adjusted to make it parallel to the outer side of the outer mold at the corresponding position, and the angle of the support plate is adjusted to keep it parallel to the ground, a plurality of sliding plates rise synchronously, and the movable parts in the pull-out assembly will not be pulled out, when the concrete in the pouring space rises asynchronously, a plurality of sliding plates rise asynchronously, and the movable parts in the pull-out assembly will be pulled out, thereby realizing the monitoring of the pouring surface, and this monitoring method can be observed intuitively by the naked eye on site, thereby effectively reducing the time gap of the correction operation.

[0032] 3. The monitoring system during the prefabrication and pouring process of the box girder can also obtain the actual rising height of the concrete at that location through the above structure. The actual rising height of the concrete is coscy, where angle c is the angle formed by the inner rod and the plumb line after adjustment, and y is the moving distance of the floating plate; the height of the pouring liquid surface can be grasped during the monitoring process.

[0033] 4. The monitoring system during the prefabrication pouring of the box girder. During the pouring process, when the concrete in the pouring space rises synchronously, multiple slides rise synchronously, and the heights of adjacent slides are consistent. The pull rope on the rotating drum will not be pulled out, and the rotating drum is in a stationary state. When the concrete in the pouring space rises asynchronously, multiple slides rise asynchronously. There is a situation where the heights of adjacent slides are inconsistent. The pull rope on the rotating drum will be pulled out, and the rotating drum will rotate, thereby realizing the monitoring of the pouring surface. The outer side of the pay-off drum is fixedly connected with a turn counter, and the input end of the turn counter penetrates the pay-off drum. The inner side is fixedly connected to the solid end of the drum, and is used to obtain the length of the pull rope when it is pulled out. In order to increase the sensitivity of the turn counter to the rotation of the drum when the pull rope is pulled out, the present invention can set a reducer between the drum and the turn counter, and the input end of the turn counter is connected to the input end of the reducer, and the drum is connected to the output end of the reducer, so that when the drum rotates, the turn counter can count more turns, thereby achieving sensitive and effective monitoring, and avoiding the problem that when the span of adjacent sliding plates is far and the height difference is small, the pull rope is pulled out The distance is weak and it is not convenient to display.

[0034] 5. The monitoring system during the prefabrication casting process of the box girder can further observe the tilt sensor to determine the specific location of the difference point when determining that there is a difference in the casting liquid level at different positions during the casting process. During the installation process, the pull rope can be knotted to achieve the role of pull rope distance compensation, and the other end of the pull rope can be detachably connected to the sliding plate where the wire drum is located through the connecting buckle to facilitate installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural diagram of the inner mold, outer mold and pouring space in the existing box girder prefabrication process;

[0036] Figure 2 It is a schematic diagram of the installation structure in the monitoring process of the present invention;

[0037] Figure 3 It is a schematic diagram of the overall installation structure of the present invention;

[0038] Figure 4 It is a schematic diagram of the cross-sectional installation structure inside the outer rod of the present invention;

[0039] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at A in FIG.

[0040] Figure 6 It is a schematic diagram of the installation structure of the support frame of the present invention;

[0041] Figure 7 It is a schematic diagram of the installation structure of the support plate of the present invention;

[0042] Figure 8 It is a schematic diagram of the surface and internal installation structure of the pay-off drum of the present invention;

[0043] Fig. 9 For the present invention Figure 8 Schematic diagram of the structure at B in FIG.

[0044] Fig.10 It is a schematic diagram of the structure of multiple sliding disks of the present invention;

[0045] Fig.11 It is a schematic diagram of the appearance structure of the fixed shaft of the present invention.

[0046] In the figure:

[0047] 1. External mold; 2. Internal mold; 3. Casting space;

[0048] 4. Support frame; 5. Outer rod; 6. Inner rod; 7. Floating plate; 8. First electric push rod; 9. Second electric push rod; 10. Support plate; 11. Motor; 12. Sliding plate; 13. Limit rod; 14. Screw rod; 15. Pay-off drum; 16. Pull rope; 17. Tilt sensor; 18. Potentiometer; 19. Piston; 20. Slider; 21. Fixed shaft; 22. Spring; 23. Rotating drum; 24. Turn counter. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1, please refer to Figure 1-11 , the present invention provides a technical solution:

[0051] The monitoring system in the process of prefabrication and pouring of the box beam comprises at least four support frames 4 which can be installed on the outside of the outer mold 1. The top of the support frame 4 is rotatably connected with an outer rod 5. The outer rod 5 can be parallel to one side of the outer mold 1 by adjusting the angle. The outer rod 5 is provided with a rise measurement assembly, which comprises a piston 19. The piston 19 is slidably connected to the inner side of the outer rod 5. The bottom end of the piston 19 is fixedly connected with an inner rod 6. The bottom end of the inner rod 6 is fixedly connected with a floating plate 7. The inner rod 6 and the floating plate 7 can move in the pouring space 3. The rising distance of the pouring liquid surface is obtained by obtaining the moving distance of the floating plate 7.

[0052] The top of the outer rod 5 is rotatably connected to a support plate 10, the top of the support plate 10 is fixedly connected to a limit rod 13, the outer side of the limit rod 13 is slidably connected to a sliding plate 12, the sliding plate 12 can move up and down, and according to the moving distance of the piston 19 during the pouring process, the sliding plate 12 rises a corresponding distance;

[0053] A limit groove is provided in the middle position of the sliding plate 12, and a wire-paying drum 15 is fixedly connected to the outer side of the sliding plate 12 at one corner position, and a pulling assembly is provided on the inner side of the wire-paying drum 15. During the pouring process, when the concrete in the pouring space 3 rises synchronously, multiple sliding plates 12 rise synchronously, and the movable parts in the pulling assembly will not be pulled out. When the concrete in the pouring space 3 rises asynchronously, multiple sliding plates 12 rise asynchronously, and the movable parts in the pulling assembly will be pulled out, thereby realizing the monitoring of the pouring surface.

[0054] The present invention can directly determine whether there is a height difference in the concrete in the pouring space 3 through a relatively simple structure, which greatly shortens the time interval from the occurrence of height deviation to the discovery of height deviation and then to the completion of adjustment during concrete pouring, thereby ensuring the molding quality of the box girder and preventing the formwork from becoming unstable due to the offset of the center of gravity and the problem of the inner mold 2 being easily tilted when the concrete height in the pouring space 3 is inconsistent.

[0055] Under the above settings, when the present invention is used, first, multiple support frames 4 are installed on the outside of the outer mold 1 in sequence, wherein four support frames 4 are installed at the four corners of the outer mold 1, and the angle of the outer rod 5 is adjusted to make it parallel to the outer side of the outer mold 1 at the corresponding position, and the angle of the support plate 10 is adjusted to keep it parallel to the ground. Multiple sliding plates 12 rise synchronously, and the movable parts in the pull-out assembly will not be pulled out. When the concrete in the casting space 3 rises asynchronously, multiple sliding plates 12 rise asynchronously, and the movable parts in the pull-out assembly will be pulled out, thereby realizing the monitoring of the casting surface. This monitoring method can be intuitively observed by the naked eye on site, thereby effectively reducing the time gap of the correction operation.

[0056] Specifically, a potentiometer 18 is fixedly connected to the inner side of the outer rod 5, and a slider 20 is fixedly connected to the inner side of the piston 19. The slider 20 slides on the potentiometer 18, and the moving distance of the floating plate 7 and the piston 19 during the pouring process is obtained through the potentiometer 18;

[0057] The moving distance of the floating plate 7 and the piston 19 during the pouring process can be obtained by the potentiometer 18. When the concrete is poured, the concrete liquid level rises, and the floating plate 7 drives the inner rod 6 and the slider 20 in the piston 19 to move. The moving distance of the slider 20 is obtained by the potentiometer 18 to obtain the moving distance of the floating plate 7;

[0058] The above structure can also be used to obtain the actual rising height of the concrete at that location. The actual rising height of the concrete is coscy, where angle c is the angle formed by the inner rod 6 and the plumb line after adjustment, and y is the moving distance of the floating plate 7. The height of the pouring liquid surface can be grasped during the monitoring process.

[0059] Specifically, a motor 11 is fixedly connected to the inner side of the top of the support plate 10, a screw 14 is fixedly connected to the end of the main shaft of the motor 11, and the outer side of the screw 14 is spirally connected to the inner side of the sliding plate 12. The upward or downward movement of the sliding plate 12 is achieved through the rotation of the motor 11.

[0060] After the floating plate 7 moves, the sliding plate 12 can be raised to the same height as the moving distance of the floating plate 7 by the rotation of the motor 11;

[0061] Specifically, the pulling assembly includes a fixed shaft 21, the outer side of the fixed shaft 21 is fixedly connected with a spring 22, the other end of the spring 22 is fixedly connected with a rotating drum 23, the outer side of the rotating drum 23 is wound with a pull rope 16, the pull rope 16 does not have a telescopic property, the spring 22 is used to make the pull rope 16 straight and play a role in distance compensation, the pull rope 16 is a movable part in the pulling assembly, the other end of the pull rope 16 is embedded in the limiting grooves of the remaining sliding disks 12 in a counterclockwise or clockwise direction, and the other end of the pull rope 16 finally returns to and is fixed on the sliding disk 12 where the wire drum 15 is located. During the pouring process, when the concrete in the pouring space 3 rises synchronously, the multiple sliding disks 12 rise synchronously, and the heights of adjacent sliding disks 12 are consistent. The pull rope 16 on the rotating drum 23 will not be pulled out, and the rotating drum 23 is in a stationary state. When the concrete in the pouring space 3 rises asynchronously, the multiple sliding disks 12 rise asynchronously, and there are In case of inconsistent heights, the pull rope 16 on the rotating drum 23 will be pulled out, and the rotating drum 23 will rotate, thereby realizing monitoring of the casting surface. A turn counter 24 is fixedly connected to the outer side of the wire-releasing drum 15, and the input end of the turn counter 24 penetrates into the inner side of the wire-releasing drum 15 and is fixedly connected to the solid end of the rotating drum 23, so as to obtain the length of the pull rope 16 when it is pulled out. In order to increase the sensitivity of the turn counter 24 to the rotation of the rotating drum 23 when the pull rope 16 is pulled out, the present invention can set a reducer between the rotating drum 23 and the turn counter 24, and the input end of the turn counter 24 is connected to the input end of the reducer, and the rotating drum 23 is connected to the output end of the reducer, so that when the rotating drum 23 rotates, the turn counter 24 can count more turns, realizing sensitive and effective monitoring, and avoiding the problem that the pull rope 16 is pulled out by a small distance and is not convenient for display when the span of the adjacent sliding plates 12 is far and the height difference is small;

[0062] Specifically, the upper side of the support frame 4 is rotatably connected to a first electric push rod 8 via a hinge, and the movable end of the first electric push rod 8 is rotatably connected to the outer side of the outer rod 5 via a hinge. The angle of the outer rod 5 is adjusted by telescoping the first electric push rod 8 so that the outer rod 5 is parallel to the outer side of the outer mold 1.

[0063] Specifically, the bottom end of the support plate 10 is rotatably connected to the second electric push rod 9 via a hinge, and the other end of the second electric push rod 9 is rotatably connected to the outer side of the upper end of the outer rod 5 via a hinge. The support plate 10 is kept in a horizontal state by retracting and extending the second electric push rod 9 and referring to the level ruler.

[0064] Specifically, a tilt sensor 17 is slidably connected to the pull rope 16 between two adjacent sliding plates 12 , so as to identify the height comparison between the two adjacent sliding plates 12 .

[0065] When determining that there are differences in the casting liquid levels at different positions during the casting process, the tilt sensor 17 can be further observed to determine the specific positions of the difference points;

[0066] Specifically, the other end of the pull rope 16 is fixedly connected with a connecting buckle, and the other end of the pull rope 16 is detachably connected to the sliding plate 12 where the pay-off drum 15 is located through the connecting buckle.

[0067] During the installation process, the pull rope 16 can be knotted to achieve the distance compensation of the pull rope 16, and the other end of the pull rope 16 can be detachably connected to the sliding plate 12 where the pay-off drum 15 is located through the connecting buckle to facilitate the installation;

[0068] The present invention also discloses a monitoring method during the prefabrication and casting process of a box beam, the steps of which are:

[0069] Step 1: Install multiple support frames 4 on the outside of the outer mold 1 in sequence, wherein four support frames 4 are installed at the four corners of the outer mold 1;

[0070] Step 2: Adjust the angle of the outer rod 5 so that it is parallel to the outer side of the outer mold 1 at the corresponding position, and adjust the angle of the support plate 10 so that it remains parallel to the ground;

[0071] Step 3: During the pouring process, when the concrete in the pouring space 3 rises synchronously, multiple slide plates 12 rise synchronously, the pull rope 16 on the rotating drum 23 will not be pulled out, and the rotating drum 23 is in a stationary state. When the concrete in the pouring space 3 rises asynchronously, multiple slide plates 12 rise asynchronously, the pull rope 16 on the rotating drum 23 will be pulled out, and the rotating drum 23 will rotate, thereby realizing the monitoring of the pouring surface.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring system for a box girder during precast casting, comprising at least four support frames (4) that can be mounted on the outside of an outer form (1), characterized in that: The top end of the support frame (4) is rotatably connected to an outer rod (5), and the outer rod (5) can be parallel to one side of the outer mold (1) by adjusting the angle. The outer rod (5) is provided with a rise measurement assembly, which includes a piston (19), and the piston (19) is slidably connected to the inner side of the outer rod (5). The bottom end of the piston (19) is fixedly connected to an inner rod (6), and the bottom end of the inner rod (6) is fixedly connected to a floating plate (7). The inner rod (6) and the floating plate (7) can move in the casting space (3), and the rising distance of the casting liquid surface can be obtained by obtaining the moving distance of the floating plate (7). The top end of the outer rod (5) is rotatably connected to a support plate (10), the top end of the support plate (10) is fixedly connected to a limit rod (13), the outer side of the limit rod (13) is slidably connected to a sliding plate (12), the sliding plate (12) can move up and down, and according to the moving distance of the piston (19) during the pouring process, the sliding plate (12) rises a corresponding distance; A limit groove is provided in the middle of the sliding plate (12), and a wire-releasing drum (15) is fixedly connected to the outer side of the sliding plate (12) at one corner position, and a pull-out assembly is provided on the inner side of the wire-releasing drum (15). During the pouring process, when the concrete in the pouring space (3) rises synchronously, the plurality of sliding plates (12) rise synchronously, and the movable parts in the pull-out assembly will not be pulled out; when the concrete in the pouring space (3) rises asynchronously, the plurality of sliding plates (12) rise asynchronously, and the movable parts in the pull-out assembly will be pulled out, thereby realizing the monitoring of the pouring surface.

2. The monitoring system during the precast casting process of the box beam according to claim 1 is characterized in that: A potentiometer (18) is fixedly connected to the inner side of the outer rod (5), and a slider (20) is fixedly connected to the inner side of the piston (19). The slider (20) slides on the potentiometer (18), and the moving distance of the floating plate (7) and the piston (19) during the pouring process is obtained through the potentiometer (18).

3. The monitoring system during the precast casting process of the box beam according to claim 2 is characterized in that: A motor (11) is fixedly connected to the inner side of the top end of the support plate (10); a screw rod (14) is fixedly connected to the end of the main shaft of the motor (11); the outer side of the screw rod (14) is spirally connected to the inner side of the sliding plate (12); and the upward or downward movement of the sliding plate (12) is achieved by the rotation of the motor (11).

4. The monitoring system during the precast casting process of the box beam according to claim 3 is characterized in that: The pulling assembly comprises a fixed shaft (21), the outer side of the fixed shaft (21) is fixedly connected to a clockwork spring (22), the other end of the clockwork spring (22) is fixedly connected to a rotating drum (23), the outer side of the rotating drum (23) is wound with a pull rope (16), the pull rope (16) does not have a telescopic property, the pull rope (16) is a movable part in the pulling assembly, the other end of the pull rope (16) is sequentially embedded in the limiting grooves of the remaining sliding disks (12) in a counterclockwise or clockwise direction, and the other end of the pull rope (16) is The end finally returns to and is fixed on the slide plate (12) where the wire release drum (15) is located. During the pouring process, when the concrete in the pouring space (3) rises synchronously, the multiple slide plates (12) rise synchronously, the pull rope (16) on the rotating drum (23) will not be pulled out, and the rotating drum (23) is in a stationary state. When the concrete in the pouring space (3) rises asynchronously, the multiple slide plates (12) rise asynchronously, the pull rope (16) on the rotating drum (23) will be pulled out, and the rotating drum (23) will rotate, thereby realizing the monitoring of the pouring surface.

5. The monitoring system during the precast casting process of the box beam according to claim 4 is characterized in that: The upper side of the support frame (4) is rotatably connected to a first electric push rod (8) via a hinge, and the movable end of the first electric push rod (8) is rotatably connected to the outer side of the outer rod (5) via a hinge. The angle of the outer rod (5) is adjusted by telescoping the first electric push rod (8), so that the outer rod (5) is parallel to the outer side of the outer mold (1).

6. The monitoring system during the precast casting process of the box beam according to claim 5, characterized in that: The bottom end of the support plate (10) is rotatably connected to a second electric push rod (9) via a hinge, and the other end of the second electric push rod (9) is rotatably connected to the outer side of the upper end of the outer rod (5) via a hinge. The support plate (10) is kept in a horizontal state by extending and retracting the second electric push rod (9) and referring to a level ruler.

7. The monitoring system during the precast casting process of the box beam according to claim 6, characterized in that: A tilt sensor (17) is slidably connected to the pull rope (16) between two adjacent sliding plates (12) and is used to identify the height comparison between the two adjacent sliding plates (12).

8. The monitoring system during the precast casting process of the box beam according to claim 7, characterized in that: A turn counter (24) is fixedly connected to the outer side of the pay-off drum (15), and an input end of the turn counter (24) penetrates into the inner side of the pay-off drum (15) and is fixedly connected to a solid end of the rotating drum (23) for obtaining the length of the pull rope (16) when it is pulled out.

9. The monitoring system during the precast casting process of the box beam according to claim 8, characterized in that: The other end of the pull rope (16) is fixedly connected to a connecting buckle, and the other end of the pull rope (16) is detachably connected to the sliding plate (12) where the pay-off drum (15) is located through the connecting buckle.

10. A monitoring method during the prefabrication and casting process of a box beam, characterized in that: Using the monitoring system as claimed in claim 8, the steps are: Step 1: installing a plurality of support frames (4) on the outside of the outer mold (1) in sequence, wherein four support frames (4) are installed at the four corners of the outer mold (1); Step 2: Adjust the angle of the outer rod (5) so that it is parallel to the outer side of the corresponding outer mold (1), and adjust the angle of the support plate (10) so that it remains parallel to the ground; Step 3: During the pouring process, when the concrete in the pouring space (3) rises synchronously, the multiple sliding plates (12) rise synchronously, the pull rope (16) on the rotating drum (23) will not be pulled out, and the rotating drum (23) is in a stationary state. When the concrete in the pouring space (3) rises asynchronously, the multiple sliding plates (12) rise asynchronously, the pull rope (16) on the rotating drum (23) will be pulled out, and the rotating drum (23) will rotate, thereby realizing the monitoring of the pouring surface.

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