A precast box girder transportation process anti-rollover stable supporting device

Abstract

The utility model relates to a prefabricated box beam carries process prevents lateral tilting stable support device relates to prefabricated box beam carries auxiliary equipment technical field, including the connecting frame, the inside front and back of connecting frame is equipped with the symmetrical distribution adjustment seat, the front end of one side of connecting frame is installed servo motor, the inside of connecting frame side frame is equipped with interval adjusting mechanism, and servo motor is used for driving interval adjusting mechanism to carry out position adjustment to adjustment seat, the below of adjustment seat all installs forked lifting support, the bottom of forked lifting support all installs fixed base, the below of fixed base is provided with prefabricated box beam clamping mechanism, prefabricated box beam clamping mechanism is composed of fixed clamping plate and movable clamping plate, and fixed clamping plate is welded fixedly in the bottom of fixed base, and movable clamping plate sets up in the below of fixed clamping plate, and this scheme has solved the problem that the support device can not be flexibly adjusted according to the specification of different prefabricated box beams and the poor auxiliary support effect.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for lifting and transporting precast box girders, specifically a stabilizing support device to prevent overturning during the lifting and transporting of precast box girders. Background Technology

[0002] A bridge erecting machine, used for transporting precast box girders, is a large-scale specialized construction machine mainly composed of a main structure, a gantry crane system, a span-crossing system, and a power system. Its working principle involves using the lower guide beam as a transport channel, with the front and rear outriggers supporting the beams, and the middle outrigger facilitating the crossing. A beam transport vehicle delivers the beam segments to the bridge erecting machine's belly, and then a crane removes the beam segments from the transport vehicle and installs them onto the pier top. It is also equipped with an auxiliary support structure. A front support frame is installed on the cantilever at the front of the bridge erecting machine's front outrigger, along with a triangular support frame, a pair of T-shaped support plates, a pair of tensioning plates, and a pair of lifting drive mechanisms. This provides support to prevent forward tilting or side overturning when the front outrigger rotates beyond the safe range or when the bridge erecting machine has tilting potential.

[0003] For example, the Chinese authorized patent CN214939389U, entitled "Anti-tipping Device for Bridge Erecting Machine", includes a bridge erecting machine body. A pier locking device is provided at the rear end of the bridge erecting machine body. A rear support leg is provided on one side of the pier locking device, and a front support leg is provided on the other side of the bridge erecting machine body. A front lifting beam trolley is provided between the front support leg and the rear support leg. A rear lifting beam trolley is provided at the rear of the front lifting beam trolley. Two movable plates are detachably connected to the top of the bridge erecting machine body. A sliding groove is opened in the middle of the movable plate, and a gravity adjustment device is matched and connected to the sliding groove.

[0004] While the existing technologies can provide auxiliary support for precast box girders, they cannot be flexibly adjusted according to the specifications of different precast box girders, and the auxiliary support effect is poor. The connection between the two is prone to instability, thus failing to meet current requirements. In response, we propose a side-tipping stabilizing support device for the lifting and transportation of precast box girders. Utility Model Content

[0005] The purpose of this utility model is to provide a stabilizing support device to prevent overturning during the lifting and transportation of precast box girders, so as to solve the problems mentioned in the background art that the support device cannot be flexibly adjusted according to the specifications of different precast box girders and the auxiliary support effect is poor.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a precast box girder anti-tipping and stabilizing support device during lifting and transport, comprising a connecting frame, wherein symmetrically distributed adjusting seats are provided at the front and rear of the connecting frame, and the adjusting seats are slidably limited by the guide grooves on the inner sidewall of the connecting frame; a servo motor is installed at the front end of one side of the connecting frame; a spacing adjustment mechanism is provided inside the side frame of the connecting frame; the servo motor is used to drive the spacing adjustment mechanism to adjust the position of the adjusting seats; a fork-shaped lifting bracket is installed below each adjusting seat; a fixed seat is installed at the bottom of each fork-shaped lifting bracket; a precast box girder clamping mechanism is provided below the fixed seat; the precast box girder clamping mechanism consists of a fixed clamping plate and a movable clamping plate; the fixed clamping plate is welded and fixed to the bottom of the fixed seat; the movable clamping plate is located below the fixed clamping plate, and the fixed clamping plate and the movable clamping plate are slidably limited.

[0007] Preferably, the spacing adjustment mechanism includes a transmission cavity disposed in the side frame of the connecting frame, a double-threaded transmission rod is rotatably mounted inside the transmission cavity, two sliding blocks are symmetrically mounted on the outside of the double-threaded transmission rod, and the sliding blocks extend out of guide grooves and are fixed to the adjustment seat. The output shaft of the servo motor is equipped with a transmission shaft, and the transmission shaft and one end of the double-threaded transmission rod are engaged by a helical gear transmission.

[0008] Preferably, an adjusting nut is rotatably installed on the upper end of the outer side of the fixed clamping plate, and a lifting adjusting screw is rotatably installed in the inner cavity of the fixed clamping plate. The upper end of the lifting adjusting screw is engaged with the shaft at one end of the adjusting nut through a helical gear transmission. The lower end of the lifting adjusting screw extends into the interior of the inner thread hole of the movable clamping plate, and the external thread of the lifting adjusting screw is threadedly connected to the inner thread hole of the movable clamping plate.

[0009] Preferably, the inner side of the fixed clamp is equipped with a detection plate for sliding limit, and pressure sensors are installed at the four corners between the detection plate and the fixed clamp.

[0010] Preferably, a reset spring is fixedly installed between the detection plate and the fixed clamping plate at the front and rear.

[0011] Preferably, both the adjusting seat and the fixed seat are provided with mounting grooves inside. The upper and lower ends of the fork-shaped lifting bracket extend into the mounting grooves of the adjusting seat and the fixed seat, respectively. Guide grooves are provided at the front and rear of the mounting grooves. Guide columns are installed on both sides of the upper and lower ends of the fork-shaped lifting bracket through bearings, and the two ends of the guide columns slide and limit the mounting grooves.

[0012] Preferably, the connecting frame has integrally formed connecting plates on both sides and front and back, and the connecting plates have bolt mounting holes inside for installation with the bridge erecting machine.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses two sets of fork-shaped lifting supports in conjunction with a bridge erecting machine to assist in the lifting of precast box girders. The bottom of both sets of fork-shaped lifting supports is equipped with a precast box girder clamping mechanism. After the front and rear ends of the precast box girder are installed with the clamping mechanism, the fork-shaped lifting supports can retract as the height of the precast box girder changes during the lifting process of the bridge erecting machine. At the same time, the connecting arms of the fork-shaped lifting supports are all rigid structures, which ensures stable support at the front and rear during the lifting process of the precast box girder with the bridge erecting machine, reducing the risk of swaying and displacement, and reducing the possibility of the bridge erecting machine overturning due to uneven force.

[0015] 2. This utility model features a clamping mechanism spacing adjustment device. By activating the servo motor on the side of the connecting frame, its output shaft drives the transmission shaft to rotate. The transmission shaft and the double-threaded transmission rods on both sides are driven by helical gears. The rotating double-threaded transmission rods rub against the sliding block, converting the rotational motion into linear motion. This achieves the opposite displacement of the two sets of adjustment seats, thereby adjusting the clamping mechanism spacing. This enhances the flexibility and applicability of the bridge erecting machine in lifting precast box girders. It can adapt to precast box girders of different sizes and specifications, eliminating the need for frequent replacement of equipment parts. Combined with the stable support of the fork-shaped lifting bracket, it further enhances the safety of the bridge erecting machine during the lifting process.

[0016] 3. This utility model features a precast box girder clamping mechanism composed of a fixed clamping plate and a movable clamping plate. The adjustment device allows the clamping mechanism to fit snugly against the front and back of the precast box girder. The user can use tools to rotate the adjusting nut on the outside of the fixed clamping plate. Under the meshing of the helical gear, the lifting adjustment screw rotates. The external thread and the internal thread of the movable clamping plate rub against each other, and the inner cavity guides the movable clamping plate, causing it to retract. This allows the horizontal plate at the top of the fixed clamping plate and the bottom plate of the movable clamping plate to clamp one end of the precast box girder. This not only adapts to precast box girders of different shapes and sizes but also ensures that the clamping force is evenly distributed, avoiding localized damage to the box girder. At the same time, the firm clamping prevents the box girder from shaking or shifting during lifting. In conjunction with the fork-shaped lifting bracket and the spacing adjustment device, it further improves the safety and accuracy of the bridge erecting machine operation. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a front view of the present invention;

[0019] Figure 3 For the present utility model Figure 2 Enlarged view of a portion of region A in the middle;

[0020] Figure 4 This is a top view of the present invention;

[0021] Figure 5This is a perspective view of the connection between the fixed base and the fork-shaped lifting bracket of this utility model.

[0022] In the diagram: 1. Connecting frame; 2. Adjusting seat; 3. Guide slide; 4. Fork-shaped lifting bracket; 5. Fixed seat; 6. Mounting slot; 7. Fixed clamping plate; 8. Movable clamping plate; 9. Adjusting nut; 10. Detection plate; 11. Connecting plate; 12. Bolt mounting hole; 13. Servo motor; 14. Lifting adjusting screw; 15. Pressure sensor; 16. Return spring; 17. Double threaded transmission rod; 18. Sliding block; 19. Transmission shaft; 20. Guide groove; 21. Guide column. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1-5 This utility model provides an embodiment of a precast box girder anti-tipping stabilizing support device, including a connecting frame 1. The connecting frame 1 has symmetrically distributed adjusting seats 2 at the front and rear, and the adjusting seats 2 are slidably limited with the guide grooves 3 on the inner side wall of the connecting frame 1. A servo motor 13 is installed at the front end of one side of the connecting frame 1. The side frame of the connecting frame 1 is provided with a spacing adjustment mechanism. The servo motor 13 is used to drive the spacing adjustment mechanism to adjust the position of the adjusting seats 2. A fork-shaped lifting bracket 4 is installed below each adjusting seat 2. A fixed seat 5 is installed at the bottom of each fork-shaped lifting bracket 4. A precast box girder clamping mechanism is provided below the fixed seat 5. The precast box girder clamping mechanism consists of a fixed clamping plate 7 and a movable clamping plate 8. The fixed clamping plate 7 is welded and fixed to the bottom of the fixed seat 5. The movable clamping plate 8 is located below the fixed clamping plate 7, and the fixed clamping plate 7 and the movable clamping plate 8 are slidably limited.

[0025] After the servo motor 13 starts, it drives the spacing adjustment mechanism to operate. Under the limiting action of the guide slide 3, the adjustment seat 2 slides within the connecting frame 1 as the spacing adjustment mechanism moves, thereby changing its position. The adjustment seat 2 drives the lower fork-shaped lifting bracket 4 to move. The fork-shaped lifting bracket 4 can retract according to the change in the height of the precast box girder. At the same time, the fixed clamping plate 7 of the precast box girder clamping mechanism is fixed to the bottom of the fixed seat 5, and the movable clamping plate 8 can slide relative to the fixed clamping plate 7 to prepare for subsequent clamping actions. This device can adapt to the width of precast box girders of different sizes, improving the versatility of the device. The retraction function of the fork-shaped lifting bracket 4 can always closely fit the precast box girder during the lifting process, providing stable support. The sliding limit design of the fixed clamping plate 7 and the movable clamping plate 8 lays the foundation for precise clamping of the precast box girder.

[0026] Please see Figure 1The connecting frame 1 has integrally formed connecting plates 11 on both sides and front and back. The connecting plates 11 have bolt mounting holes 12 inside for installation with the bridge erecting machine. By inserting bolts into the bolt mounting holes 12 and tightening the bolts, the connecting plates 11 of the connecting frame 1 are tightly fixed to the corresponding parts of the bridge erecting machine, thereby installing the anti-overturning stabilizing support device onto the bridge erecting machine.

[0027] Please see Figure 1 and Figure 4 The spacing adjustment mechanism includes a transmission cavity set in the side frame of the connecting frame 1. A double threaded transmission rod 17 is rotatably installed inside the transmission cavity. Two sliding blocks 18 are symmetrically installed on the outside of the double threaded transmission rod 17. The sliding blocks 18 extend out of the guide groove 3 and are fixed to the adjustment seat 2. The output shaft of the servo motor 13 is equipped with a transmission shaft 19. The transmission shaft 19 and one end of the double threaded transmission rod 17 are connected by a helical gear transmission.

[0028] When the servo motor 13 operates, its output shaft drives the transmission shaft 19 to rotate. The transmission shaft 19 drives the double-threaded transmission rod 17 to rotate through the helical gear transmission. The two reverse threads on the double-threaded transmission rod 17 cause the two sliding blocks 18 sleeved on the outside to move towards or away from each other along the double-threaded transmission rod 17. The sliding blocks 18 drive the adjustment seat 2 fixed to them to slide in the guide groove 3, thereby realizing the adjustment of the distance between the two sets of adjustment seats 2.

[0029] Please see Figure 1 , Figure 2 and Figure 3 An adjusting nut 9 is rotatably installed on the upper end of the outer side of the fixed clamping plate 7. A lifting adjusting screw 14 is rotatably installed in the inner cavity of the fixed clamping plate 7. The upper end of the lifting adjusting screw 14 is connected to the shaft at one end of the adjusting nut 9 through a helical gear transmission. The lower end of the lifting adjusting screw 14 extends into the inner thread hole of the movable clamping plate 8, and the external thread of the lifting adjusting screw 14 is threadedly connected to the inner thread hole of the movable clamping plate 8.

[0030] The user uses a tool to rotate the adjusting nut 9 on the outside of the fixed clamping plate 7. The adjusting nut 9 drives the lifting adjusting screw 14 to rotate through the helical gear transmission. Since the external thread of the lifting adjusting screw 14 is threadedly connected to the internal threaded hole of the movable clamping plate 8, under the action of thread friction, and with the guiding action of the inner cavity of the fixed clamping plate 7 on the movable clamping plate 8, the movable clamping plate 8 moves up and down linearly along the lifting adjusting screw 14, achieving retraction. This allows the horizontal plate at the upper end of the fixed clamping plate 7 and the bottom plate of the movable clamping plate 8 to clamp one end of the precast box girder. The lifting and adjusting of the movable clamping plate 8 can be adjusted according to the thickness and other dimensions of the precast box girder to ensure a tight fit and secure clamping.

[0031] Please see Figure 1 , Figure 2 and Figure 3The inner side of the fixed clamping plate 7 is equipped with a detection plate 10 for sliding limit. Pressure sensors 15 are installed at the four corners between the detection plate 10 and the fixed clamping plate 7. Reset springs 16 are fixedly installed between the detection plate 10 and the fixed clamping plate 7 at the front and back.

[0032] When the precast box girder is fixed by the clamping mechanism, it contacts the detection plate 10 and generates pressure. The pressure sensors 15 at the four corners collect pressure data in real time. The pressure sensors compare and analyze the pressure data at the front and rear ends. If the pressure difference exceeds the preset warning value, it indicates that there is uneven pressure at the front and rear ends of the precast box girder. At this time, the pressure sensors will send the abnormal data to the operation center through the built-in wireless communication module.

[0033] Please see Figure 1 and Figure 5 The interior of both the adjusting seat 2 and the fixed seat 5 is provided with an installation groove 6. The upper and lower ends of the fork-shaped lifting bracket 4 extend into the installation grooves 6 of the adjusting seat 2 and the fixed seat 5, respectively. The front and rear of the installation groove 6 are provided with guide grooves 20. The upper and lower ends of the fork-shaped lifting bracket 4 are both equipped with guide columns 21 by bearings, and the two ends of the guide columns 21 slide and limit the installation groove 6.

[0034] During the lifting and transport of precast box girders, when the height of the fork-shaped lifting support 4 needs to be adjusted, the guide columns 21 at its upper and lower ends slide along the guide grooves 20 within the mounting groove 6 as the fork-shaped lifting support 4 moves up and down. The bearings allow the guide columns 21 to rotate flexibly, reducing frictional resistance and ensuring smooth lifting and lowering of the fork-shaped lifting support 4. Simultaneously, the guide grooves 20 limit and guide the guide columns 21, ensuring the fork-shaped lifting support 4 remains vertically upright without deviation or swaying. During the lifting and transport of the precast box girders by the bridge erecting machine, the fork-shaped lifting support 4 contracts and expands with the change in height of the precast box girder, always maintaining close contact with the precast box girder and providing stable support.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A precast box girder anti-tipping stabilizing support device during lifting and transport, comprising a connecting frame (1), characterized in that: The connecting frame (1) has symmetrically distributed adjustment seats (2) inside, and the adjustment seats (2) slide and limit the guide groove (3) on the inner side wall of the connecting frame (1). A servo motor (13) is installed at the front end of one side of the connecting frame (1). The side frame of the connecting frame (1) is provided with a spacing adjustment mechanism. The servo motor (13) is used to drive the spacing adjustment mechanism to adjust the position of the adjustment seat (2). A fork-shaped lifting bracket (4) is installed below each adjustment seat (2). A fixed seat (5) is installed at the bottom of each fork-shaped lifting bracket (4). A precast box girder clamping mechanism is provided below the fixed seat (5). The precast box girder clamping mechanism consists of a fixed clamping plate (7) and a movable clamping plate (8). The fixed clamping plate (7) is welded and fixed to the bottom of the fixed seat (5). The movable clamping plate (8) is located below the fixed clamping plate (7), and the fixed clamping plate (7) slides and limits the movable clamping plate (8).

2. The anti-tipping stabilizing support device for precast box girder during lifting and transportation according to claim 1, characterized in that: The spacing adjustment mechanism includes a transmission cavity set in the side frame of the connecting frame (1). A double threaded transmission rod (17) is rotatably installed inside the transmission cavity. Two sliding blocks (18) are symmetrically installed on the outside of the double threaded transmission rod (17). The sliding blocks (18) extend out of the guide groove (3) and are fixed to the adjustment seat (2). The output shaft of the servo motor (13) is equipped with a transmission shaft (19). The transmission shaft (19) and one end of the double threaded transmission rod (17) are connected by a helical gear transmission.

3. The anti-tipping stabilizing support device for precast box girder during lifting and transportation according to claim 1, characterized in that: An adjusting nut (9) is rotatably installed on the upper end of the outer side of the fixed clamp (7). A lifting adjusting screw (14) is rotatably installed in the inner cavity of the fixed clamp (7). The upper end of the lifting adjusting screw (14) is connected to the shaft at one end of the adjusting nut (9) through a helical gear transmission. The lower end of the lifting adjusting screw (14) extends into the inner thread hole of the movable clamp (8). The external thread of the lifting adjusting screw (14) is threadedly connected to the inner thread hole of the movable clamp (8).

4. The anti-tipping stabilizing support device for the lifting and transporting of precast box girders according to claim 3, characterized in that: The inner side of the fixed clamp (7) is slidably limited by a detection plate (10), and pressure sensors (15) are installed at the four corners between the detection plate (10) and the fixed clamp (7).

5. The anti-tipping stabilizing support device for the lifting and transporting of precast box girders according to claim 4, characterized in that: A return spring (16) is fixedly installed between the detection plate (10) and the fixed clamping plate (7).

6. The anti-tipping stabilizing support device for the lifting and transporting of precast box girders according to claim 1, characterized in that: The interior of both the adjusting seat (2) and the fixed seat (5) is provided with an installation groove (6). The upper and lower ends of the fork-shaped lifting bracket (4) extend into the installation groove (6) of the adjusting seat (2) and the fixed seat (5) respectively. The front and rear of the installation groove (6) are provided with guide grooves (20). The upper and lower ends of the fork-shaped lifting bracket (4) are equipped with guide columns (21) through bearings, and the two ends of the guide columns (21) slide and limit the installation groove (6).

7. The anti-tipping stabilizing support device for the lifting and transporting of precast box girders according to claim 1, characterized in that: The connecting frame (1) has connecting plates (11) integrally formed on both sides and front and back. The connecting plates (11) are provided with bolt mounting holes (12) for installation with the bridge erecting machine.

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