Quick steering device for prefabricated small box girder

Abstract

The utility model discloses a prefabricated small box girder rapid steering device which comprises a foundation table top, the foundation table top is laid on horizontal concrete, an outer ring track and an inner ring track are arranged on the foundation table top and are of a concentric annular structure, and a steering frame body is arranged in the diameter direction of the concentric annular structure. Prefabricated small box girders are placed on the bogie body, the two ends of the bogie body are connected with heavy-load trolleys, and the heavy-load trolleys are located in the concentric annular structure. According to the utility model, the problems of complex operation and low efficiency of the rotating mode of the existing prefabricated small box girder are solved, and the rapid and stable steering of the prefabricated small box girder is realized.

Description

Technical Field

[0001] This utility model belongs to the technical field of bridge engineering equipment and relates to a rapid turning device for prefabricated small box girders. Background Technology

[0002] In bridge engineering, the production and installation of precast beams are crucial steps. Precast beams are typically fabricated in a prefabrication yard according to a specific orientation and position. However, during subsequent transportation and installation, it is often necessary to rotate the precast beams to the appropriate angle to meet the bridge's design requirements and construction conditions. Precast small box girders, due to their mature technology, economical cost, and convenient construction, have become a commonly used precast beam structure for newly constructed urban viaducts. During the prefabrication of small box girders, the concrete must be cured for 7 days, until the concrete strength reaches at least 90% of the design strength, before prestressing steel reinforcement can be tensioned. After tensioning, the beams are moved, typically using a bridge erecting machine to laterally move the precast small box girders to the designed position.

[0003] The hoisting of precast box girders depends on construction conditions, such as the construction site and bridge girder erection environment, and may be carried out using a single or double crane. During hoisting, the precast box girders need to be adjusted in direction and position, and when close to the predetermined position, fine-tuning of their relative position to the main girder is necessary. For double-crane hoisting, the two cranes cooperate to adjust the position and direction of the precast box girders during lifting. The rotation of the precast box girders mainly relies on large lifting equipment, such as cranes, achieving rotation through multiple lifting and adjustments. This method is not only complex and inefficient but also requires a large working space and poses safety risks.

[0004] With the increasing number and scale of bridge construction projects, the demand for precast beam rotation equipment is becoming more and more urgent. There is an urgent need for equipment that can efficiently, safely and conveniently rotate precast beams. Utility Model Content

[0005] The purpose of this invention is to provide a rapid turning device for precast small box girders, which solves the problems of complex operation and low efficiency in the existing rotation methods of precast small box girders.

[0006] The technical solution adopted by this utility model is a prefabricated small box girder rapid turning device, including a foundation platform, which is laid on a horizontal concrete surface. An outer ring track and an inner ring track are set on the foundation platform. The outer ring track and the inner ring track form a concentric circular ring structure. A bogie body is set along the diameter direction of the concentric circular ring structure. A prefabricated small box girder is placed on the bogie body. Both ends of the bogie body are connected to a heavy-duty trolley, which is located inside the concentric circular ring structure.

[0007] The feature of this utility model is that,

[0008] Slewing bearings are installed at the concentric centers of the outer and inner tracks. The bottom of the outer wheel of the slewing bearing is fixed to the foundation platform, and the top of the inner wheel of the slewing bearing is fixed to a support seat, which is then fixed to the bogie body.

[0009] The bogie body includes an intermediate rotating frame, a support seat fixed to the middle of the intermediate rotating frame, and rotating frames fixedly connected to both ends of the intermediate rotating frame. Connecting parts are provided at both ends of the intermediate rotating frame and the connecting rotating frame. The connecting rotating frame is fixedly connected to the heavy-duty trolley through the connecting parts.

[0010] An electrical control box is installed on the intermediate rotating frame, and the gravity sensor and speed sensor are electrically connected inside the control box.

[0011] Each heavy-duty trolley includes a heavy-duty body with a heavy-duty platform on the body relative to the center. Precast small box girders are placed on the heavy-duty platform. The heavy-duty body is equipped with a power walking mechanism, which includes a reducer and a drive motor. The drive motor is fixedly installed inside the heavy-duty body. The input shaft of the reducer and the output shaft of the drive motor are coaxially fixed. The output shaft of the reducer extends parallel to the axis of the precast small box girder. The output shaft of the reducer is connected to the wheel axle, and a synchronous drive chain is used to connect the output shaft of the reducer to the driven wheel axle, which is also connected to the driven wheel axle. The reducer and drive motor on each heavy-duty trolley are electrically connected to the electrical control box.

[0012] The heavy-duty platform is equipped with diagonal braces on both sides. Support rods are threaded onto the diagonal braces. A diagonal brace handwheel is circumferentially installed at the bottom of the support rod. The diagonal brace handwheel and the support rod rotate synchronously on the diagonal brace. A pad is installed at the top of the support rod. Several positioning holes are provided axially on the diagonal brace. A pin hole is opened at the bottom of the support rod. When the support rod is extended or retracted to a fixed position, it is limited and fixed by a pin shaft passing through the pin hole and the positioning hole.

[0013] Rope connection holes are provided on the heavy-duty vehicle body.

[0014] Several bolt holes are made at the relative positions of the intermediate rotating frame, the two connecting rotating frames, and the two heavy-duty trolleys. The intermediate rotating frame, the two connecting rotating frames, and the two heavy-duty trolleys are kept at the same level. The connecting parts are bolts and nuts, which are fixed by passing through the bolt holes.

[0015] The beneficial effects of this utility model are as follows: The precast small box girder rapid turning device of this utility model has a simple structure and is easy to use; it significantly reduces the time for rotating the precast small box girder; it greatly simplifies the overall operation process and improves the overall work efficiency. The precast small box girder can turn and rotate at any angle within the circumference, ensuring the stability of the precast small box girder during turning. This utility model's precast small box girder rapid turning device has sufficient strength to support the weight of the precast beam, which can improve the stability of the precast small box girder during rotation, making the rotation smooth and fast. It also has a small footprint, is safe and reliable, economical and practical, and highly efficient, and can be widely applied. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly structure of the prefabricated small box girder rapid turning device of this utility model;

[0017] Figure 2 This is a top view of the prefabricated small box girder rapid turning device of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the prefabricated small box girder rapid turning device of this utility model;

[0019] Figure 4 yes Figure 3 Enlarged schematic diagram of the heavy-duty trolley structure at point A;

[0020] Figure 5 This is a side view of the heavy-duty trolley of this utility model;

[0021] Figure 6 This is a side view of the intermediate rotating frame of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the intermediate rotating frame of this utility model;

[0023] Figure 8 This is a structural schematic diagram of the connecting rotating frame of this utility model.

[0024] In the diagram, 1. Foundation platform, 2. Bogie body, 3. Outer track, 4. Inner track, 5. Heavy-duty trolley, 6. Intermediate rotating frame, 7. Connecting rotating frame, 8. Slewing bearing, 9. Electrical control box, 10. Connecting component, 11. Heavy-duty platform, 12. Diagonal brace handwheel, 13. Diagonal brace rod, 14. Heavy-duty vehicle body, 15. Power travel mechanism, 16. Wheel, 17. Rope connection hole. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] The structure of this utility model's prefabricated small box girder rapid turning device is as follows: Figure 1 and Figure 2 , Figure 3 As shown, it includes a foundation platform 1, which is laid on a horizontal concrete surface. An outer ring track 3 and an inner ring track 4 are set on the foundation platform 1. The outer ring track 3 and the inner ring track 4 form a concentric circular ring structure. A bogie body 2 is set along the diameter direction of the concentric circular ring structure. A prefabricated small box girder is placed on the bogie body 2. Both ends of the bogie body 2 are connected to heavy-duty trolleys 5, which are located inside the concentric circular ring structure.

[0028] Example 2

[0029] The structure of this utility model's precast small box girder rapid turning device includes a foundation platform 1, which is laid on a horizontal concrete surface. An outer ring track 3 and an inner ring track 4 are arranged on the foundation platform 1, forming a concentric circular structure. A bogie body 2 is arranged along the diameter of the concentric circular structure, and the precast small box girder is placed on the bogie body 2. Heavy-duty trolleys 5 are connected to both ends of the bogie body 2, and the heavy-duty trolleys 5 are located inside the concentric circular structure. Based on embodiment 1, in this embodiment, a slewing bearing 8 is installed at the concentric center of the outer ring track 3 and the inner ring track 4. The bottom of the outer wheel of the slewing bearing 8 is fixed to the foundation platform 1, and the top of the inner wheel of the slewing bearing 8 is fixed to a support seat. The support seat is fixed to the bogie body 2, allowing the bogie body 2 to rotate 360°, meeting the requirements for turning the precast small box girder at any angle. The slewing bearing 8 has a large load-bearing capacity, high operational stability, and light weight.

[0030] Example 3

[0031] The structure of this utility model's precast small box girder rapid steering device includes a foundation platform 1, which is laid on horizontal concrete. An outer ring track 3 and an inner ring track 4 are installed on the foundation platform 1, forming a concentric circular structure. A bogie body 2 is installed along the diameter of the concentric circular structure, and a precast small box girder is placed on the bogie body 2. Heavy-duty trolleys 5 are connected to both ends of the bogie body 2, and the heavy-duty trolleys 5 are located inside the concentric circular structure. A slewing bearing 8 is installed at the concentric center of the outer ring track 3 and the inner ring track 4. The bottom of the outer wheel of the slewing bearing 8 is fixed to the foundation platform 1, and the top of the inner wheel of the slewing bearing 8 is fixed to a support seat, which is then fixed to the bogie body 2. Based on Embodiment 2, in this embodiment, the bogie body 2 includes an intermediate rotating frame 6, a support seat is fixedly connected to the middle of the intermediate rotating frame 6, and rotating frames 7 are fixedly connected to both ends of the intermediate rotating frame 6. Connecting parts 10 are provided at both ends of the intermediate rotating frame 6 and the connecting rotating frame 7. The connecting rotating frame 7 is fixedly connected to the heavy-duty trolley 5 through the connecting parts 10, so that the working strength of the bogie body 2 is high and it is not easy to deform.

[0032] like Figure 6 , Figure 7 , Figure 8 As shown, several bolt holes are opened at the relative positions of the intermediate rotating frame 6, the two connecting rotating frames 7, and the two heavy-duty trolleys 5. The intermediate rotating frame 6, the two connecting rotating frames 7, and the two heavy-duty trolleys 5 are kept at the same level. The connecting parts 10 are fixed with bolts and nuts, which pass through the bolt holes to keep the whole in a horizontal state, so as to ensure the smooth rotation of the equipment.

[0033] Example 4

[0034] The structure of this utility model's precast small box girder rapid steering device includes a foundation platform 1, which is laid on horizontal concrete. An outer ring track 3 and an inner ring track 4 are installed on the foundation platform 1, forming a concentric circular structure. A bogie body 2 is installed along the diameter of the concentric circular structure, and a precast small box girder is placed on the bogie body 2. Heavy-duty trolleys 5 are connected to both ends of the bogie body 2, and the heavy-duty trolleys 5 are located inside the concentric circular structure. A slewing bearing 8 is installed at the concentric center of the outer ring track 3 and the inner ring track 4. The bottom of the outer wheel of the slewing bearing 8 is fixed to the foundation platform 1, and the top of the inner wheel of the slewing bearing 8 is fixed to a support seat, which is then fixed to the bogie body 2. The bogie body 2 includes an intermediate rotating frame 6, a support seat fixed to the middle of the intermediate rotating frame 6, and rotating frames 7 fixedly connected to both ends of the intermediate rotating frame 6. Connecting parts 10 are provided at both ends of the intermediate rotating frame 6 and the connecting rotating frame 7. The connecting rotating frame 7 is fixedly connected to the heavy-duty trolley 5 through the connecting parts 10. Based on embodiment 3, in this embodiment, an electrical control box 9 is provided on the intermediate rotating frame 6. The electrical control box 9 is electrically connected to a gravity sensor and a speed sensor. The gravity sensor is used to collect the weight of the precast beam, and the speed sensor monitors parameters such as the speed and rotation angle during operation.

[0035] Example 5

[0036] The structure of this utility model's precast small box girder rapid steering device includes a foundation platform 1, which is laid on horizontal concrete. An outer ring track 3 and an inner ring track 4 are installed on the foundation platform 1, forming a concentric circular structure. A bogie body 2 is installed along the diameter of the concentric circular structure, and a precast small box girder is placed on the bogie body 2. Heavy-duty trolleys 5 are connected to both ends of the bogie body 2, and the heavy-duty trolleys 5 are located inside the concentric circular structure. A slewing bearing 8 is installed at the concentric center of the outer ring track 3 and the inner ring track 4. The bottom of the outer wheel of the slewing bearing 8 is fixed to the foundation platform 1, and the top of the inner wheel of the slewing bearing 8 is fixed to a support seat, which is then fixed to the bogie body 2. The bogie body 2 includes an intermediate rotating frame 6, with a support fixed to the middle of the intermediate rotating frame 6. Rotating frames 7 are fixedly connected to both ends of the intermediate rotating frame 6. Connecting members 10 are provided at both ends of the intermediate rotating frame 6 and the connecting rotating frames 7. The connecting rotating frames 7 are fixedly connected to the heavy-duty trolley 5 via the connecting members 10. An electrical control box 9 is installed on the intermediate rotating frame 6, and a gravity sensor and a speed sensor are electrically connected inside the electrical control box 9. Based on embodiment 4, each heavy-duty trolley 5 in this embodiment includes a heavy-duty vehicle body 14. A heavy-duty platform 11 is opened on the heavy-duty vehicle body 14 in the direction relative to the center. A prefabricated small box girder is placed on the heavy-duty platform 11. A power walking mechanism 15 is installed inside the heavy-duty vehicle body 14, such as... Figure 4 , Figure 5 As shown, the power walking mechanism 15 includes a reducer and a drive motor. The drive motor is fixedly installed inside the heavy-duty vehicle body 14. The input shaft of the reducer is coaxially fixed with the output shaft of the drive motor. The direction of the output shaft of the reducer motor is parallel to the axial direction of the precast small box girder. The output shaft of the reducer is connected to the wheel axle, and a 16 is sleeved on the wheel axle. A synchronous drive chain is used to connect the output shaft of the reducer to the driven wheel axle, and a 16 is sleeved on the driven wheel axle. The reducer and drive motor have high output torque, providing sufficient power for the heavy-duty trolley 5 to ensure that the heavy-duty trolley 5 rotates smoothly while carrying the precast beam. The reducer has a speed adjustment function, with a speed range of 3.5 min-15 min for 180 degrees of rotation. The speed of the equipment can be adjusted according to actual needs. The reducer and drive motor on each heavy-duty trolley 5 are electrically connected to the electrical control box 9 to ensure the synchronization of the two heavy-duty trolleys 5 during operation and reduce deviation.

[0037] Example 6

[0038] The structure of this utility model's precast small box girder rapid steering device includes a foundation platform 1, which is laid on horizontal concrete. An outer ring track 3 and an inner ring track 4 are installed on the foundation platform 1, forming a concentric circular structure. A bogie body 2 is installed along the diameter of the concentric circular structure, and a precast small box girder is placed on the bogie body 2. Heavy-duty trolleys 5 are connected to both ends of the bogie body 2, and the heavy-duty trolleys 5 are located inside the concentric circular structure. A slewing bearing 8 is installed at the concentric center of the outer ring track 3 and the inner ring track 4. The bottom of the outer wheel of the slewing bearing 8 is fixed to the foundation platform 1, and the top of the inner wheel of the slewing bearing 8 is fixed to a support seat, which is then fixed to the bogie body 2. The bogie body 2 includes an intermediate rotating frame 6, a support seat is fixed to the middle of the intermediate rotating frame 6, and rotating frames 7 are fixedly connected to both ends of the intermediate rotating frame 6. Connecting parts 10 are provided at both ends of the intermediate rotating frame 6 and the connecting rotating frame 7. The connecting rotating frame 7 is fixedly connected to the heavy-duty trolley 5 through the connecting parts 10. An electrical control box 9 is provided on the intermediate rotating frame 6, and a gravity sensor and a speed sensor are electrically connected inside the electrical control box 9. Each heavy-duty trolley 5 includes a heavy-duty body 14, on which a heavy-duty platform 11 is opened in the direction of the center. A precast small box girder is placed on the heavy-duty platform 11. A power walking mechanism 15 is set inside the heavy-duty body 14. The power walking mechanism 15 includes a reducer and a drive motor. The drive motor is fixedly set inside the heavy-duty body 14. The input shaft of the reducer and the output shaft of the drive motor are coaxially fixed. The direction of the output shaft of the reducer motor is parallel to the axis of the precast small box girder. The output shaft of the reducer is connected to the wheel axle. A 16 is sleeved on the wheel axle. The output shaft of the reducer is connected to the driven wheel axle by a synchronous drive chain. A 16 is sleeved on the driven wheel axle. The reducer and drive motor on each heavy-duty trolley 5 are electrically connected to the electrical control box 9. Based on Example 5, in this example, the heavy-duty platform 11 is provided with diagonal braces 13 on both sides. Support rods are threaded onto the diagonal braces 13. A diagonal brace handwheel 12 is provided circumferentially at the bottom of the support rod. The diagonal brace handwheel 12 and the support rod rotate synchronously on the diagonal brace 13. A pad is provided at the top of the support rod. Several positioning holes are provided axially on the diagonal brace 13. A pin hole is opened at the bottom of the support rod. When the support rod is extended or retracted to a fixed position, it is limited and fixed by a pin through the pin hole and the positioning hole, thereby providing inclined support for the side of the precast small box girder and enhancing its load-bearing capacity and stability.

[0039] The heavy-duty vehicle body 14 is equipped with rope connection holes 17 for fixing and locking the precast small box girder, ensuring the stability of the precast beam position during rotation.

[0040] The working principle of this precast small box girder rapid turning device is as follows: Each set of equipment is equipped with two heavy-duty trolleys 5. The outer ring track 3 and inner ring track 4 are made of steel, possessing sufficient strength and stability. The dimensions of the outer ring track 3 and inner ring track 4 meet the requirements of the overall layout and the rotation of the precast small box girder, ensuring the smooth operation of the heavy-duty trolleys 5 on the tracks. The intermediate rotating frame 6 is connected to the foundation platform 1 through a slewing bearing 8, enabling 360° unrestricted rotation, ensuring the flexible rotation of the precast small box girder at any angle. The connecting rotating frame 7 is used to connect the heavy-duty trolleys 5 and the intermediate rotating frame 6, ensuring the structural integrity and stability of the entire equipment. Both the intermediate rotating frame 6 and the connecting rotating frame 7 are made of high-strength channel steel frames, reducing weight and improving overall performance while ensuring strength. Both ends are firmly connected to the heavy-duty trolleys 5 and the intermediate rotating platform with bolts, ensuring reliable connection during equipment operation and preventing loosening or deformation.

[0041] The working process of this precast small box girder rapid turning device is as follows: A lifting device is used to hoist the precast small box girder onto the heavy-duty trolley 5, and it is slowly lowered. The precast small box girder is placed on the heavy-duty trolley 5 according to the prescribed method, and the load is gradually increased to the designed bearing weight. Steel wire ropes are used to firmly fix the precast small box girder to the heavy-duty trolley 5 to ensure that the precast small box girder will not shift during rotation. Rotation begins to achieve precise angle adjustment. When the precast small box girder has rotated to the designated angle, rotation stops, and the lifting device is used to lift the precast small box girder from the heavy-duty trolley 5, completing the unloading of the precast small box girder. After unloading, the device is checked to ensure it is in normal working order, preparing for the next rotation operation of the precast small box girder.

[0042] This utility model's precast small box girder rapid steering device has a reasonable structural design, capable of withstanding the weight of the precast small box girder and various forces during rotation. The heavy-duty trolley 5 provides power, thereby achieving rapid steering, stable driving and steering. It is suitable for the needs of precast beams of different types and sizes, has versatility and adaptability, reduces the customization cost of equipment, meets the requirements of engineering construction quality, safety and schedule, has low cost and good effect, and can play an efficient, stable and safe role in the construction of precast beams in bridge engineering, providing strong equipment support for bridge construction.

Claims

1. A rapid steering device for prefabricated small box girders, characterized in that, Includes a foundation platform (1), which is laid on horizontal concrete. An outer ring track (3) and an inner ring track (4) are set on the foundation platform (1). The outer ring track (3) and the inner ring track (4) are in a concentric circular ring structure. A bogie body (2) is set along the diameter direction of the concentric circular ring structure. A precast small box girder is placed on the bogie body (2). Both ends of the bogie body (2) are connected to heavy-duty trolleys (5). The heavy-duty trolleys (5) are located inside the concentric circular ring structure.

2. The precast small box girder rapid turning device according to claim 1, characterized in that, A slewing bearing (8) is installed at the concentric center of the outer track (3) and the inner track (4). The bottom of the outer wheel of the slewing bearing (8) is fixed on the foundation platform (1), and the top of the inner wheel of the slewing bearing (8) is fixed to a support seat, which is fixed to the bogie body (2).

3. The precast small box girder rapid turning device according to claim 2, characterized in that, The bogie body (2) includes an intermediate rotating frame (6), a support seat is fixed to the middle of the intermediate rotating frame (6), and rotating frames (7) are fixedly connected to both ends of the intermediate rotating frame (6). Connecting parts (10) are provided at both ends of the intermediate rotating frame (6) and the connecting rotating frame (7). The connecting rotating frame (7) is fixedly connected to the heavy-duty trolley (5) through the connecting parts (10).

4. The precast small box girder rapid turning device according to claim 3, characterized in that, An electrical control box (9) is installed on the intermediate rotating frame (6), and a gravity sensor and a speed sensor are electrically connected inside the electrical control box (9).

5. The rapid turning device for precast small box girders according to claim 4, characterized in that, Each of the heavy-duty trolleys (5) includes a heavy-duty car body (14), a heavy-duty platform (11) is opened on the heavy-duty car body (14) in the direction of the center, a precast small box girder is placed on the heavy-duty platform (11), a power walking mechanism (15) is set inside the heavy-duty car body (14), the power walking mechanism (15) includes a reducer and a drive motor, the drive motor is fixedly set inside the heavy-duty car body (14), the input shaft of the reducer is coaxially fixed with the output shaft of the drive motor, the direction of the output shaft of the reducer motor is parallel to the axial direction of the precast small box girder, the output shaft of the reducer is connected to the wheel axle, and a (16) is sleeved on the wheel axle, the output shaft of the reducer is connected to the driven wheel axle by a synchronous drive chain, and a (16) is sleeved on the driven wheel axle, and the reducer and drive motor on each heavy-duty trolley (5) are electrically connected to the electrical control box (9).

6. The rapid turning device for precast small box girders according to claim 5, characterized in that, The heavy-duty platform (11) has diagonal braces (13) on both sides. A support rod is threaded onto the diagonal brace (13). A diagonal brace handwheel (12) is circumferentially provided at the bottom of the support rod. The diagonal brace handwheel (12) and the support rod rotate synchronously on the diagonal brace (13). A pad is provided at the top of the support rod. Several positioning holes are provided axially on the diagonal brace (13). A pin hole is opened at the bottom of the support rod. When the support rod is extended or retracted to a fixed position, it is limited and fixed by passing through the pin hole and the positioning hole with a pin shaft.

7. The precast small box girder rapid turning device according to claim 6, characterized in that, The heavy-duty vehicle body (14) is provided with rope connection holes (17).

8. The precast small box girder rapid turning device according to claim 3, characterized in that, The intermediate rotating frame (6), the two connecting rotating frames (7), and the two heavy-duty trolleys (5) are provided with several bolt holes at their relative positions. The intermediate rotating frame (6), the two connecting rotating frames (7), and the two heavy-duty trolleys (5) are kept at the same level. The connecting parts (10) are made of bolts and nuts, which are fixed by passing through the bolt holes.

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