Steel box girder transport vehicle and hoisting fine adjustment device

Abstract

The utility model discloses a steel box girder transport vehicle and a hoisting fine adjustment device, and relates to the technical field of hoisting, the steel box girder transport vehicle comprises a vehicle body and a hoisting plate, the vehicle body is rotatably connected with a rotating plate, and the vehicle body is connected with the rotating plate through a rotating assembly; the rotating plate is connected with a multi-stage hydraulic cylinder through an adjusting mechanism, the output end of the multi-stage hydraulic cylinder is provided with an electric hoist, the electric hoist is connected with a lifting hook through a first lifting rope, the lifting hook is connected with the four corners of a lifting plate through a second lifting rope, and the four corners of the lifting plate are provided with tilt angle sensors; third lifting ropes are connected to the four corners of the lifting plate through winding mechanisms, and the other ends of the third lifting ropes are connected with the steel box girder body through connecting mechanisms. Precise fine adjustment of hoisting is achieved through multi-stage linkage, the precision of butt joint installation of the steel box girders is remarkably improved, the stability and safety of a bridge structure are guaranteed, manual dependence is greatly reduced, and operation efficiency and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting and hoisting, in particular to a steel box beam transport vehicle and a lifting fine-adjusting device. Background Art

[0002] The transportation and hoisting of steel box girders are critical in engineering projects such as large-scale bridge construction. As infrastructure construction continues to evolve toward larger spans and more complex structures, stringent requirements are placed on the accuracy, stability, and efficiency of steel box girder transportation and hoisting.

[0003] In the existing hoisting equipment for steel box girder hoisting operations, the common hook and rope combination is mostly a single fixed structure. The length of the rope cannot be flexibly adjusted, and the posture and position of the steel box girder cannot be easily and accurately fine-tuned during the hoisting process. This makes it difficult to meet the high-precision installation requirements at the millimeter level when the steel box girder is docked and installed, increases the construction difficulty and errors, and thus affects the stability and safety of the overall structure of the bridge. Moreover, in the traditional hoisting process, the coordination of the hook and the rope can only achieve basic lifting functions, and lacks linkage with intelligent monitoring equipment. The traditional hoisting process is highly dependent on the experience of the operator, and manual operation inevitably has problems such as reaction lag and judgment error. Under complex working conditions, it is difficult to ensure the smooth progress of the hoisting operation. Therefore, those skilled in the art provide a steel box girder transport vehicle and a hoisting fine-tuning device to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a steel box girder transport vehicle and a hoisting fine-tuning device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A steel box girder transport vehicle, comprising:

[0007] A vehicle body, wherein a rotating plate is rotatably connected to the vehicle body, and the vehicle body is connected to the rotating plate via a rotating assembly;

[0008] The rotating plate is connected to a multi-stage hydraulic cylinder via an adjusting mechanism, an electric hoist is installed at an output end of the multi-stage hydraulic cylinder, and the electric hoist is connected to a hook via a first lifting rope.

[0009] Preferably, the rotating assembly includes a servo motor and a gear plate, the servo motor is mounted on the vehicle body, and the output end of the servo motor is connected to the gear plate, the rotating plate is provided with a toothed edge, and the gear plate is engaged with the toothed edge.

[0010] Preferably, the adjustment mechanism includes a servo electric cylinder, two first connecting blocks, two second connecting blocks and two support plates, wherein one of the first connecting blocks is connected to the cylinder body of the servo electric cylinder, and the other first connecting block is connected to the output end of the servo electric cylinder, the two second connecting blocks are respectively connected to the rotating plate and the multi-stage hydraulic cylinder, the first connecting block and the second connecting block are rotatably connected, the two support plates are installed on the rotating plate, and one end of the multi-stage hydraulic cylinder is rotatably connected between the support plates.

[0011] A lifting fine-adjustment device for a steel box girder transport vehicle comprises a lifting plate and the above-mentioned steel box girder transport vehicle, wherein the lifting hook is connected to the four corners of the lifting plate via a second lifting rope, and the four corners of the lifting plate are equipped with inclination sensors;

[0012] The four corners of the hoisting plate are connected to a third hoisting rope through a winding mechanism, and the other end of the third hoisting rope is connected to the steel box beam body through a connecting mechanism.

[0013] Preferably, magnet frames are provided at the four corners of the hanging plate, and magnet blocks are installed on the inclination sensor, and the magnet blocks are magnetically connected to the magnet frames.

[0014] Preferably, the winding mechanism includes a drive motor, a winding roller, a positioning roller, a side plate and a three-pulley tension sensor, the drive motor is installed on the lifting plate, the winding roller and the positioning roller are connected to the lifting plate through the side plate, and the output end of the drive motor is connected to the extension end of the winding roller passing through the side plate, the three-pulley tension sensor is installed on the lifting plate, and the three-pulley tension sensor is installed between the winding roller and the positioning roller, and the third lifting rope is wound around the winding roller, the three-pulley tension sensor and the positioning roller in sequence.

[0015] Preferably, the connecting mechanism includes an L-shaped plate, an electric push rod, a movable plate and a locking rod, the end of the third lifting rope away from the positioning roller is connected to the L-shaped plate, the electric push rod is installed on the L-shaped plate, and the output end of the electric push rod is connected to the movable plate, the locking rod is connected to the movable plate, and the locking rod passes through the through hole on the L-shaped plate, the locking rod is connected to the lifting ring on the steel box girder body, and a control switch is installed on the L-shaped plate.

[0016] Preferably, a PLC controller is installed on the hanging plate, and the PLC controller is electrically connected to the inclination sensor, the three-pulley tension sensor and the drive motor respectively.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The utility model realizes precise fine-tuning of hoisting through multi-stage linkage. The rotating assembly on the vehicle body can drive the rotating plate to rotate. Combined with the adjustment mechanism to control the extension and contraction of the multi-stage hydraulic cylinder, the height and horizontal position of the electric hoist can be flexibly adjusted during transportation to avoid obstacles in advance. In the hoisting process, the hook is connected to the hoisting plate through the second lifting rope. The inclination sensor on the plate monitors the posture of the steel box girder in real time. Once it detects that the tilt angle exceeds the set threshold, it will feed back the data to the control system. At this time, the winding mechanism at the four corners of the hoisting plate can independently control the retraction and extension length of the third lifting rope to achieve millimeter-level posture fine-tuning of the steel box girder in three dimensions, solving the problem that traditional hooks cannot be accurately adjusted, significantly improving the accuracy of the docking installation of the steel box girder, and ensuring the stability and safety of the bridge structure.

[0019] 2. The utility model greatly reduces dependence on manual labor and improves work efficiency and safety. Traditional hoisting operations are highly dependent on the experience of operators, and are prone to problems such as delayed response and operational errors under complex working conditions. This device integrates the inclination sensor, winding mechanism and connecting mechanism through the electronic control system to achieve automated hoisting fine-tuning control. The operator only needs to set the target parameters on the control terminal, and the system can automatically adjust the posture and position of the steel box girder to avoid manual operation errors. In addition, the combined design of the rotating plate and the multi-stage hydraulic cylinder enables the device to have flexible spatial adaptability during transportation, and can operate efficiently in narrow construction sites, thereby improving the efficiency of hoisting operations and significantly reducing the safety risks caused by improper manual operation, providing reliable equipment guarantees for large-scale bridge construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional view of a steel box girder transport vehicle in an embodiment of the present application;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a structural schematic diagram of a hoisting fine-adjustment device for a steel box girder transport vehicle in another embodiment of the present application;

[0023] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0024] Figure 5 This is a schematic cross-sectional view of a magnet frame of a hoisting fine-tuning device for a steel box girder transport vehicle according to another embodiment of the present application;

[0025] Figure 6 This is a schematic cross-sectional structure diagram of an L-shaped plate of a lifting fine-adjustment device for a steel box girder transport vehicle in another embodiment of the present application;

[0026] Figure 7This is a structural schematic diagram of a steel box girder transport vehicle and a hoisting fine-tuning device in an embodiment of the present application.

[0027] In the figure: 1. Car body; 2. Rotating plate; 3. Multi-stage hydraulic cylinder; 4. Electric hoist; 5. First lifting rope; 6. Hook; 7. Servo motor; 8. Gear plate; 9. Tooth edge; 10. Servo electric cylinder; 11. First connecting block; 12. Second connecting block; 13. Support plate; 14. Lifting plate; 15. Inclination sensor; 16. Second lifting rope; 17. Third lifting rope; 18. Magnet frame; 19. Magnet block; 20. Drive motor; 21. Winding roller; 22. Positioning roller; 23. Side plate; 24. Three-pulley tension sensor; 25. L-shaped plate; 26. Electric push rod; 27. Lifting ring; 28. Moving plate; 29. ​​Engaging rod; 30. Through hole; 31. Control switch; 32. PLC controller. DETAILED DESCRIPTION

[0028] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figure 1 、 Figure 2 and Figure 7 , the utility model provides a technical solution:

[0031] A steel box girder transport vehicle, comprising:

[0032] The vehicle body 1 is rotatably connected to a rotating plate 2. The vehicle body 1 is connected to the rotating plate 2 via a rotating assembly. The rotating assembly includes a servo motor 7 and a gear plate 8. The servo motor 7 is mounted on the vehicle body 1, and the output end of the servo motor 7 is connected to the gear plate 8. The rotating plate 2 is provided with a toothed edge 9, and the gear plate 8 meshes with the toothed edge 9.

[0033] A multi-stage hydraulic cylinder 3 is connected to the rotating plate 2 through an adjusting mechanism, an electric hoist 4 is installed at the output end of the multi-stage hydraulic cylinder 3, and the electric hoist 4 is connected to the hook 6 through a first lifting rope 5. The adjusting mechanism includes a servo electric cylinder 10, two first connecting blocks 11, two second connecting blocks 12 and two support plates 13, one of the first connecting blocks 11 is connected to the cylinder body of the servo electric cylinder 10, and the other first connecting block 11 is connected to the output end of the servo electric cylinder 10, the two second connecting blocks 12 are respectively connected to the rotating plate 2 and the multi-stage hydraulic cylinder 3, the first connecting block 11 and the second connecting block 12 are rotatably connected, the two support plates 13 are installed on the rotating plate 2, and one end of the multi-stage hydraulic cylinder 3 is rotatably connected between the support plates 13.

[0034] From the transporter's cab, the operator starts vehicle body 1, preparing to transport the steel box girder to the designated lifting location. During transport, if the electric hoist 4 needs to be adjusted to avoid obstacles or adapt to road conditions, a command can be issued through the control terminal in the cab. At this point, the servo motor 7 in the rotating assembly receives the signal and begins to operate. Its output drives the gear plate 8, which meshes with the toothed edge 9 of the rotating plate 2, thereby rotating the rotating plate 2 on the vehicle body 1, adjusting the horizontal position of the electric hoist 4.

[0035] To adjust the height of the electric hoist 4, the control terminal sends a command to the servo cylinder 10 of the adjustment mechanism. The cylinder body of the servo cylinder 10 is connected to the rotating plate 2 via a first connecting block 11, and the output end is connected to another first connecting block 11. The two first connecting blocks 11 are each rotatably connected to a second connecting block 12, which is in turn fixed to the rotating plate 2 and the multi-stage hydraulic cylinder 3. When the servo cylinder 10 is extended or retracted, the linkage between the first connecting block 11 and the second connecting block 12 drives the multi-stage hydraulic cylinder 3 to rotate around the hinge point between the support plates 13, thereby achieving angular adjustment of the multi-stage hydraulic cylinder 3 and precisely adjusting the vertical height of the electric hoist 4. The entire process can be remotely controlled from the cab, allowing for flexible response to complex transportation environments.

[0036] Example 2

[0037] See also Figure 3-Figure 7 The present invention also provides a lifting fine-tuning device for a steel box girder transport vehicle, comprising a lifting plate 14 and the above-mentioned steel box girder transport vehicle, wherein a lifting hook 6 is connected to the four corners of the lifting plate 14 via a second lifting rope 16, and an inclination sensor 15 is installed at the four corners of the lifting plate 14, and a magnet frame 18 is provided at the four corners of the lifting plate 14, and a magnet block 19 is installed on the inclination sensor 15, and the magnet block 19 is magnetically connected to the magnet frame 18;

[0038] The four corners of the hoisting plate 14 are connected to the third hoisting rope 17 through a winding mechanism. The winding mechanism includes a drive motor 20, a winding roller 21, a positioning roller 22, a side plate 23 and a three-pulley tension sensor 24. The drive motor 20 is installed on the hoisting plate 14. The winding roller 21 and the positioning roller 22 are connected to the hoisting plate 14 through the side plate 23, and the output end of the drive motor 20 is connected to the extension end of the winding roller 21 passing through the side plate 23. The three-pulley tension sensor 24 is installed on the hoisting plate 14, and the three-pulley tension sensor 24 is installed between the winding roller 21 and the positioning roller 22. The third hoisting rope 17 is wound around the winding roller 21, the three-pulley tension sensor 24 and the positioning roller 22 in sequence.

[0039] When the steel box girder transporter reaches the lifting position, the operator in the cab controls the electric hoist 4 to descend, lowering the hook 6 via the first lifting rope 5. The hook 6 is then connected to the second lifting rope 16 at the four corners of the lifting plate 14. At this point, the tilt sensor 15 on the lifting plate 14 (magnetically connected to the magnet frame 18 via magnet blocks 19 for easy installation and maintenance) begins operating, monitoring the initial tilt angle of the lifting plate 14 in real time and transmitting the data to the PLC controller 32 on the lifting plate 14.

[0040] Simultaneously, the operator activates the drive motor 20 from within the cab, and the winding mechanism begins operating. The drive motor 20 rotates the winding roller 21, wrapping the third hoisting rope 17 around it and passing through the positioning roller 22 and three-pulley tension sensor 24. The positioning roller 22 guides the third hoisting rope 17, while the three-pulley tension sensor 24 monitors the rope's tension in real time and feeds it back to the PLC controller 32, ensuring that the rope tension remains within a safe range and preventing instability in the steel box girder installation caused by uneven tension.

[0041] During the hoisting process, if the inclination sensor 15 detects that the inclination angle of the hoisting plate 14 exceeds the set threshold, it will immediately transmit the data to the PLC controller 32. After processing, the PLC controller 32 sends a command to the drive motor 20 of the winding mechanism. The drive motor 20 independently controls the forward or reverse rotation of the winding rollers 21 at the four corners of the hoisting plate 14 according to different control signals, accurately adjusting the retracted and extended length of the third hoisting rope 17. For example, when the left side of the steel box girder is too low, the PLC controller 32 controls the left drive motor 20 to reverse and shorten the third hoisting rope 17, while the right drive motor 20 rotates forward and lengthens the third hoisting rope 17. Through coordinated adjustment in three-dimensional space, the inclination angle of the steel box girder is corrected to within the error range.

[0042] Furthermore, the three-pulley tension sensor 24 continuously monitors the tension of the third hoist rope 17. If the tension of any rope becomes abnormal, the PLC controller 32 immediately issues an alarm and adjusts the speed of the corresponding drive motor 20 to balance the tension of each rope, ensuring a safe and stable hoisting process. The entire hoisting fine-tuning process eliminates the need for manual operation at height. Instead, the control terminal in the cab enables automated and precise hoisting operations, significantly improving both efficiency and safety.

[0043] The other end of the third lifting rope 17 is connected to the steel box girder body through a connecting mechanism, which includes an L-shaped plate 25, an electric push rod 26, a movable plate 28 and a locking rod 29. The end of the third lifting rope 17 away from the positioning roller 22 is connected to the L-shaped plate 25, the electric push rod 26 is installed on the L-shaped plate 25, and the output end of the electric push rod 26 is connected to the movable plate 28, the locking rod 29 is connected to the movable plate 28, and the locking rod 29 passes through the through hole 30 on the L-shaped plate 25, the locking rod 29 is connected to the lifting ring 27 on the steel box girder body, and a control switch 31 is installed on the L-shaped plate 25.

[0044] The hook 6 lifts the hoisting plate 14 via the second hoisting rope 16. After the third hoisting rope 17 is connected to the steel box girder body via a connecting mechanism, the hoisting and fine-tuning phase officially begins. The L-shaped plate 25 in the connecting mechanism is connected to the third hoisting rope 17. The operator controls the extension and retraction of the electric push rod 26 via the control switch 31 on the L-shaped plate 25 or the control terminal in the cab. The electric push rod 26 drives the moving plate 28 to move, which in turn causes the engaging rod 29 to pass through the through hole 30 in the L-shaped plate 25 and engage with the lifting ring 27 on the steel box girder body, completing the hoisting and fixing of the steel box girder. The locking rod 29 is directly engaged with the steel box girder lifting ring 27, and cooperates with the limiting function of the through hole 30 of the L-shaped plate 25 to reduce radial shaking and form basic mechanical fixation; the electric push rod 26 drives the locking rod 29 to retract and retract, ensuring a close fit with the lifting ring 27, avoiding looseness caused by manual operation errors, and improving connection reliability; the lifting tension is dispersed through the L-shaped plate 25, and the weight of the steel box girder is evenly transmitted through the four-corner connection mechanism, reducing single-point load and enhancing overall stability.

[0045] In the above embodiment, a PLC controller 32 is installed on the hanging plate 14 , and the PLC controller 32 is electrically connected to the tilt sensor 15 , the three-pulley tension sensor 24 and the drive motor 20 .

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel box girder transport vehicle, characterized in that: include: A vehicle body (1), wherein a rotating plate (2) is rotatably connected to the vehicle body (1), and the vehicle body (1) is connected to the rotating plate (2) via a rotating assembly; The rotating plate (2) is connected to a multi-stage hydraulic cylinder (3) via an adjusting mechanism, an electric hoist (4) is installed at the output end of the multi-stage hydraulic cylinder (3), and the electric hoist (4) is connected to a hook (6) via a first lifting rope (5).

2. The steel box girder transport vehicle according to claim 1, characterized in that: The rotating assembly comprises a servo motor (7) and a gear plate (8); the servo motor (7) is mounted on the vehicle body (1); an output end of the servo motor (7) is connected to the gear plate (8); a toothed edge (9) is provided on the rotating plate (2); and the gear plate (8) is meshed with the toothed edge (9).

3. The steel box girder transport vehicle according to claim 2, characterized in that: The regulating mechanism comprises a servo electric cylinder (10), two first connecting blocks (11), two second connecting blocks (12) and two supporting plates (13), wherein one of the first connecting blocks (11) is connected to the cylinder body of the servo electric cylinder (10), and the other first connecting block (11) is connected to the output end of the servo electric cylinder (10), and the two second connecting blocks (12) are respectively connected to the rotating plate (2) and the multi-stage hydraulic cylinder (3), the first connecting block (11) and the second connecting block (12) are rotatably connected, the two supporting plates (13) are mounted on the rotating plate (2), and one end of the multi-stage hydraulic cylinder (3) is rotatably connected between the supporting plates (13).

4. A lifting and fine-tuning device for a steel box girder transport vehicle, comprising a lifting plate (14) and a steel box girder transport vehicle according to any one of claims 1 to 3, characterized in that: The hook (6) is connected to the four corners of the hanging plate (14) through a second hanging rope (16), and the four corners of the hanging plate (14) are equipped with inclination sensors (15); The four corners of the hoisting plate (14) are connected to a third hoisting rope (17) through a winding mechanism, and the other end of the third hoisting rope (17) is connected to the steel box beam body through a connecting mechanism.

5. The hoisting fine-tuning device for a steel box girder transport vehicle according to claim 4, characterized in that: The four corners of the hanging plate (14) are provided with magnet frames (18), and a magnet block (19) is installed on the inclination sensor (15), and the magnet block (19) is magnetically connected in the magnet frame (18).

6. The hoisting fine-tuning device for a steel box girder transport vehicle according to claim 5, characterized in that: The winding mechanism comprises a driving motor (20), a winding roller (21), a positioning roller (22), a side plate (23) and a three-pulley tension sensor (24); the driving motor (20) is mounted on a hanging plate (14); the winding roller (21) and the positioning roller (22) are connected to the hanging plate (14) through the side plate (23); the output end of the driving motor (20) is connected to the extension end of the winding roller (21) passing through the side plate (23); the three-pulley tension sensor (24) is mounted on the hanging plate (14); and the three-pulley tension sensor (24) is mounted between the winding roller (21) and the positioning roller (22); the third hoisting rope (17) is wound around the winding roller (21), the three-pulley tension sensor (24) and the positioning roller (22) in sequence.

7. The hoisting fine-tuning device for a steel box girder transport vehicle according to claim 6, characterized in that: The connecting mechanism includes an L-shaped plate (25), an electric push rod (26), a movable plate (28) and a locking rod (29); one end of the third lifting rope (17) away from the positioning roller (22) is connected to the L-shaped plate (25); the electric push rod (26) is installed on the L-shaped plate (25), and the output end of the electric push rod (26) is connected to the movable plate (28); the locking rod (29) is connected to the movable plate (28), and the locking rod (29) passes through the through hole (30) on the L-shaped plate (25); the locking rod (29) is connected to the lifting ring (27) on the steel box girder body; and a control switch (31) is installed on the L-shaped plate (25).

8. The hoisting fine-tuning device for a steel box girder transport vehicle according to claim 7, characterized in that: A PLC controller (32) is installed on the hanging plate (14), and the PLC controller (32) is electrically connected to the tilt sensor (15), the three-pulley tension sensor (24) and the drive motor (20).

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