Crack monitoring device for cast-in-place thin-wall box girder in construction period

Abstract

The invention discloses a cast-in-place thin-wall box girder construction period crack monitoring device which comprises a bottom plate, a working box installed at the top of the bottom plate and universal wheels installed at the four corners of the bottom of the bottom plate. A handle which is of a U-shaped structure and is fixedly connected with the working box is jointly installed at the tops of the two supporting rods, an opening is formed in one side of the working box, a box door is hinged to one side of the opening, and a first electric telescopic rod is installed on the inner wall of the top of the working box. Therefore, the monitoring range of the intelligent camera is expanded, a worker can conveniently master the condition of the bottom of the box girder, the worker does not need to hold the camera by hand to carry out detection under the box girder, and the safety coefficient is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of box girder crack detection, in particular to a crack monitoring device for cast-in-place thin-wall box girder during construction period. Background Art Box girder is a kind of beam in bridge engineering. It is hollow inside and has flanges on both sides of the upper part, similar to a box, hence its name. Thin-walled box girder is widely used in modern bridges due to its unique mechanical properties and structural characteristics. Its main advantages are: light structure and large spanning capacity; large concrete area at the bottom plate and top plate, which can effectively resist positive and negative bending moments; large cross-sectional torsional stiffness, and sufficient stability during construction and use; box girder has good integrity, combining force transmission and load-bearing, so that all parts of the structure are stressed together, high cross-sectional utilization, suitable for the spatial layout of prestressed concrete structures, and can meet economic requirements.

[0002] Among the concrete box girder bridges under construction, some of them have cracked during the construction process, especially in the web and bottom plates of the box girder, which has caused great harm to the durability of the structure. These cracks generally occur in the early stages of construction and maintenance, when the structure has not yet been subjected to any external force. Most of the cracks are non-structural cracks. In order to ensure the quality of construction, the cracks in the box girder need to be monitored during the construction period. The existing monitoring method requires staff to use handheld cameras to collect crack images for monitoring, which not only takes a lot of time, but also has a low safety factor during work. At the same time, the detection range is small, which is not convenient for people to use. Summary of the invention

[0003] The purpose of the present invention is to provide a template with simple structure and reasonable design in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: A crack monitoring device for a cast-in-place thin-walled box girder during construction comprises a base plate, a working box installed on the top of the base plate, and universal wheels installed at the four corners of the bottom of the base plate, a first electric telescopic rod is installed on the top inner wall of the working box, a horizontally arranged second electric telescopic rod is installed on the output end of the first electric telescopic rod, a fixing plate is installed on the output end of the second electric telescopic rod, a supporting plate is installed on the bottom of the fixing plate, a mounting plate with a U-shaped groove on one side is installed on one side of the supporting plate, a rotating rod is rotatably connected inside the U-shaped groove, a mounting block is installed outside the rotating rod, and a smart camera is installed outside the mounting block, and an adjusting mechanism for adjusting the angle of the smart camera is installed on one side of the supporting plate.

[0005] As a further optimization scheme of the present invention, the adjustment mechanism includes a mounting rod rotatably connected to one side of the support plate, a rotating disk installed on one side of the mounting rod, and a push rod movably connected to one side of the rotating disk and located at an eccentric position, the bottom of the push rod is hinged with a rack, and one end of the rotating rod extends to one side of the mounting plate and is installed with a gear meshing with the rack.

[0006] As a further optimization scheme of the present invention, a T-shaped slot is provided on one side of the support plate, a T-shaped slider is slidably connected inside the T-shaped slot, and a limiting rod fixedly connected to one side of the rack is installed on one side of the T-shaped slider.

[0007] As a further optimization scheme of the present invention, a mounting groove is opened on one side of the fixed plate, and the interior of the mounting groove is rotatably connected to a rotating rod extending to the bottom of the fixed plate, a rotating motor driving the rotating rod to rotate is installed in the mounting groove, a first bevel gear is installed at the bottom of the rotating rod, and a second bevel gear meshing with the first bevel gear is installed on the outside of the mounting rod.

[0008] As a further optimization solution of the present invention, two support rods are installed on the top of the base plate, and a handle with a U-shaped structure and fixedly connected to the working box is installed on the top of the two support rods.

[0009] As a further optimization solution of the present invention, an opening is provided on one side of the working box, and a box door is hinged on one side of the opening.

[0010] As a further optimization scheme of the present invention, a pull rope is installed on one side of the box door, a fixed block is installed on one side of the pull rope, a hook is installed on one side of the fixed block, and a limiting ring used in conjunction with the hook is installed on one side of the working box.

[0011] As a further optimization solution of the present invention, a processing box is installed inside the working box, a processor electrically connected to the smart camera is installed inside the processing box, and an alarm electrically connected to the processor is installed on the top of the processing box.

[0012] To sum up, the beneficial effects of the present invention are: during the process of monitoring the box girder, the present invention will cause the smart camera to swing back and forth, thereby increasing the monitoring range of the smart camera, making it easier for staff to understand the situation at the bottom of the box girder, and there is no need for staff to use handheld cameras to conduct inspections under the box girder, thereby improving the safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention during practical application; Figure 2 is a first three-dimensional structural schematic diagram of the present invention; Figure 3 The present invention Figure 2 Schematic diagram of the local structure in; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at B in the middle; Figure 6 For the present invention Figure 3 Schematic diagram of the enlarged structure at C in the middle; Figure 7 It is a schematic diagram of a second three-dimensional structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at D in the middle.

[0014] Description of reference numerals: 1. Bottom plate; 2. Working box; 3. Box door; 4. Handle; 5. Fixed plate; 6. Support plate; 7. Mounting plate; 8. Rotating rod; 9. Rotating disk; 10. Push rod; 11. Rotating rod; 12. Gear; 13. Rack; 14. Smart camera; 15. First electric telescopic rod; 16. Second electric telescopic rod; 17. T-shaped slide groove; 18. T-shaped slider; 19. Limit rod; 20. First bevel gear; 21. Mounting rod; 22. Second bevel gear; 23. Fixed block; 24. Mounting groove; 25. Pull rope; 26. Rotating motor; 27. Limit ring; 28. Hook; 29. ​​Processing box. DETAILED DESCRIPTION

[0015] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0016] like Figure 1 - Figure 8As shown, a crack monitoring device for a cast-in-place thin-walled box girder during construction comprises a base plate 1, a working box 2 installed on the top of the base plate 1, and universal wheels installed at the four corners of the bottom of the base plate 1, two support rods are installed on the top of the base plate 1, and a handle 4 with a U-shaped structure and fixedly connected to the working box 2 is installed on the top of the two support rods. An opening is opened on one side of the working box 2, and a box door 3 is hinged on one side of the opening. A first electric telescopic rod 15 is installed on the top inner wall of the working box 2, and a second electric telescopic rod 16 arranged horizontally is installed on the output end of the first electric telescopic rod 15, and a fixing plate 5 is installed on the output end of the second electric telescopic rod 16, and a supporting plate 6 is installed on the bottom of the fixing plate 5, and a mounting plate 7 with a U-shaped groove on one side is installed on one side of the supporting plate 6, and a rotating rod 11 is rotatably connected to the inside of the U-shaped groove, and a mounting block is installed on the outside of the rotating rod 11, and a smart camera 14 is installed on the outside of the mounting block, and an adjusting mechanism for adjusting the angle of the smart camera 14 is installed on one side of the supporting plate 6;Among them, the adjustment mechanism includes a mounting rod 21 rotatably connected to one side of the support plate 6, a rotating disk 9 installed on one side of the mounting rod 21, and a push rod 10 movably connected to one side of the rotating disk 9 and located at an eccentric position, a rack 13 is hinged at the bottom of the push rod 10, one end of the rotating rod 11 extends to one side of the mounting plate 7 and is installed with a gear 12 meshing with the rack 13, a T-shaped slot 17 is provided on one side of the support plate 6, a T-shaped slider 18 is slidably connected inside the T-shaped slot 17, and a limiting rod 19 fixedly connected to one side of the rack 13 is installed on one side of the T-shaped slider 18, and the T-shaped slot 17 and the T-shaped slider 18 can be provided. In order to limit the rack 13 and prevent the rack 13 from deviating when the push rod 10 pushes the rack 13 to move, a mounting groove 24 is provided on one side of the fixed plate 5, and the interior of the mounting groove 24 is rotatably connected with a rotating rod 8 extending to the bottom of the fixed plate 5, and a rotating motor 26 for driving the rotating rod 8 to rotate is installed in the mounting groove 24, and a first bevel gear 20 is installed at the bottom of the rotating rod 8, and a second bevel gear 22 meshing with the first bevel gear 20 is installed on the outside of the mounting rod 21, a pull rope 25 is installed on one side of the box door 3, a fixed block 23 is installed on one side of the pull rope 29, and a hook 28 is installed on one side of the fixed block 23, and the working box 2 A limiting ring 27 used in conjunction with a hook 28 is installed on one side of the working box 2. When the box door 3 is opened, the hook 28 can be hung in the limiting ring 27, so that the box door 3 can be pulled to prevent the box door 3 from being closed during the monitoring process. A processing box 29 is installed inside the working box 2. A processor electrically connected to the smart camera 14 is installed inside the processing box 29. An alarm electrically connected to the processor is installed on the top of the processing box 29. The smart camera 14 transmits the captured information to the processor for processing. When the processor detects that there is a crack in the captured picture, it transmits the information to the processor. When the device is used, the first electric telescopic rod 15 drives the second electric telescopic rod 16 to move upwards. At this time, the fixed plate 5 drives the support plate 6 to move upwards, thereby moving the smart camera 14 upwards. When the smart camera 14 moves to the top of the bottom plate 1 and corresponds to the opening, the first electric telescopic rod 15 stops moving, and the second electric telescopic rod 16 moves the fixed plate 5 and the support plate 6 into the working box 2, and then closes the box door 3, thereby protecting the monitoring device and reducing the damage to the monitoring device when it is not in use.

[0017] It should be noted that, when using this device for monitoring cracks during the construction period of a cast-in-place thin-walled box girder, the device is moved to the top of the box girder that needs to be monitored, the box door 3 is opened, and the hook 28 is hung in the limiting ring 27. At this time, the box door 3 can be limited, and the second electric telescopic rod 16 is started. The second electric telescopic rod 16 will drive the fixed plate 5 to move, thereby pushing the fixed plate 5 through the opening to the outside of the working box 2. When the support plate 6 moves to the edge of the box girder, the second electric telescopic rod 16 stops moving. At this time, the first electric telescopic rod 15 will drive the fixed plate 5 to move downward, and then the support plate 6 will move downward, thereby moving the smart camera 14 to the bottom of the box girder. When the second electric telescopic rod 16 is moved to the edge of the box girder, the second electric telescopic rod 16 stops moving. At this time, the first electric telescopic rod 15 will drive the fixed plate 5 to move downward, and then the support plate 6 will move downward, thereby moving the smart camera 14 to the bottom of the box girder. When the hand 4 pushes the working box 2 to move, the rotating motor 26 will drive the rotating rod 8 to rotate. When the rotating rod 8 rotates, it will drive the first bevel gear 20 to rotate. Under the cooperation of the first bevel gear 20 and the second bevel gear 22, the mounting rod 21 will drive the rotating disk 9 to rotate. When the rotating disk 9 rotates, it will drive the push rod 10 to move, thereby causing the rack 13 to reciprocate up and down. When the rack 13 reciprocates up and down, it will drive the gear 12 to reciprocate, thereby causing the rotating rod 11 to rotate reciprocatingly, thereby causing the smart camera 14 to swing back and forth, thereby increasing the monitoring range of the smart camera and making it more convenient for people to use.

[0018] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A crack monitoring device for a cast-in-place thin-walled box girder during construction, comprising a base plate (1), a working box (2) mounted on the top of the base plate (1), and universal wheels mounted at the four corners of the bottom of the base plate (1), characterized in that: A first electric telescopic rod (15) is installed on the inner wall of the top of the working box (2); a second electric telescopic rod (16) arranged horizontally is installed on the output end of the first electric telescopic rod (15); a fixing plate (5) is installed on the output end of the second electric telescopic rod (16); a supporting plate (6) is installed at the bottom of the fixing plate (5); a mounting plate (7) having a U-shaped groove on one side is installed on one side of the supporting plate (6); a rotating rod (11) is rotatably connected inside the U-shaped groove; a mounting block is installed outside the rotating rod (11); and a smart camera (14) is installed outside the mounting block; and an adjusting mechanism for adjusting the angle of the smart camera (14) is installed on one side of the supporting plate (6).

2. A crack monitoring device for cast-in-place thin-walled box beam during construction according to claim 1, characterized in that: The adjustment mechanism comprises a mounting rod (21) rotatably connected to one side of a support plate (6), a rotating disk (9) mounted on one side of the mounting rod (21), and a push rod (10) movably connected to one side of the rotating disk (9) and located at an eccentric position, wherein a rack (13) is hingedly connected to the bottom of the push rod (10), and one end of the rotating rod (11) extends to one side of the mounting plate (7) and is mounted with a gear (12) meshing with the rack (13).

3. A crack monitoring device for cast-in-place thin-walled box girder during construction according to claim 2, characterized in that: A T-shaped slide groove (17) is provided on one side of the support plate (6), a T-shaped slider (18) is slidably connected inside the T-shaped slide groove (17), and a limiting rod (19) fixedly connected to one side of the rack (13) is installed on one side of the T-shaped slider (18).

4. The crack monitoring device for cast-in-place thin-walled box girder during construction according to claim 2, characterized in that: A mounting groove (24) is provided on one side of the fixing plate (5), a rotating rod (8) extending to the bottom of the fixing plate (5) is rotatably connected inside the mounting groove (24), a rotating motor (26) for driving the rotating rod (8) to rotate is installed in the mounting groove (24), a first bevel gear (20) is installed at the bottom of the rotating rod (8), and a second bevel gear (22) meshing with the first bevel gear (20) is installed outside the mounting rod (21).

5. The crack monitoring device for cast-in-place thin-walled box girder during construction according to claim 1, characterized in that: Two support rods are installed on the top of the bottom plate (1), and a handle (4) having a U-shaped structure and fixedly connected to the working box (2) is installed on the top of the two support rods.

6. The crack monitoring device for cast-in-place thin-walled box girder during construction according to claim 1, characterized in that: An opening is provided on one side of the working box (2), and a box door (3) is hingedly connected to one side of the opening.

7. A crack monitoring device for cast-in-place thin-walled box beam during construction according to claim 6, characterized in that: A drawstring (25) is installed on one side of the box door (3), a fixing block (23) is installed on one side of the drawstring (29), a hook (28) is installed on one side of the fixing block (23), and a limiting ring (27) used in conjunction with the hook (28) is installed on one side of the working box (2).

8. The crack monitoring device for cast-in-place thin-walled box girder during construction according to claim 1, characterized in that: A processing box (29) is installed inside the working box (2), a processor electrically connected to the smart camera (14) is installed inside the processing box (29), and an alarm electrically connected to the processor is installed on the top of the processing box (29).

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