Bridge erecting device

Abstract

The utility model relates to the technical field of bridge construction, in particular to a bridge erecting device which comprises a bridge erecting machine body, a movable crown block is movably arranged on the bridge erecting machine body, and the movable crown block is used for hoisting a box girder and installing the box girder on a specified bridge pier in the mode that the movable crown block horizontally moves along the bridge erecting machine body. The two sides, with the bridge girder erection machine body as the center, of the movable crown block are each provided with at least two lifting ropes, the lower ends of the lifting ropes are connected with a lower clamping plate, one side of each lower clamping plate is arranged to be of a structure matched with the side wall of a box girder, an upper clamping plate is movably arranged on each lower clamping plate and matched with the top face of the box girder, and the upper clamping plates and the lower clamping plates surround to clamp one side of the box girder. The box girder is conveniently clamped through cooperation of the upper clamping plate and the lower clamping plate, then the box girder is conveyed to the designated pier through the movable crown block to be installed, the box girder is clamped in the mode that the upper clamping plate and the lower clamping plate are matched, the clamping and releasing efficiency is high, and therefore the bridge erecting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a bridge erection device. Background Technology

[0002] In bridge construction, the erection of box girders is one of the key processes. When erecting box girders, a bridge erecting machine is required. The box girder is lifted by a crane on a mobile overhead crane and transported to the corresponding pier by the horizontal movement of the crane, thus realizing the bridge erection operation.

[0003] Before a crane on a mobile overhead crane lifts a box girder, lifting blocks are often installed at both ends of the box girder. The connection between the mobile overhead crane and the box girder is achieved by connecting the lifting blocks on the box girder with the lifting ropes on the mobile overhead crane. After the box girder is lifted to the corresponding pier, the lifting blocks on the box girder need to be removed. This method affects the lifting efficiency of the box girder, thus affecting the bridge erection efficiency.

[0004] Therefore, it is necessary to design a bridge erection device that can efficiently lift and transport box girders, thereby improving the efficiency of bridge erection. Utility Model Content

[0005] The technical solution of this utility model is as follows: a bridge erection device, including a bridge erecting machine body, on which a mobile trolley is movably mounted. The mobile trolley is used to lift box girders and install them onto designated bridge piers by moving them horizontally along the bridge erecting machine body. The mobile trolley has at least two lifting ropes on both sides centered on the bridge erecting machine body. The lower end of each lifting rope is connected to a lower clamping plate. One side of the lower clamping plate is configured to adapt to the side wall of the box girder. An upper clamping plate is movably mounted on the lower clamping plate. The upper clamping plate adapts to the top surface of the box girder. The upper clamping plate and the lower clamping plate together enclose and clamp one side of the box girder.

[0006] In one embodiment, the number of suspension ropes is set to an even number.

[0007] In one embodiment, a second guide rod is symmetrically arranged on the top of the lower clamping plate. The second guide rod slides through the upper clamping plate. A motor is arranged in the hollow part at the bottom of the lower clamping plate. A lead screw is connected to the output shaft of the motor. The lead screw rotates through the top plane of the lower clamping plate and is threaded through the upper clamping plate.

[0008] In one embodiment, a guide sleeve 1 and a guide sleeve 2 are sleeved on the hoisting rope. The guide sleeve 2 is located below the guide sleeve 1. A guide rod 1 is installed on the outer wall of the guide sleeve 1. The guide rod 1 slides through the vertical plate on the outer wall of the guide sleeve 2.

[0009] In one embodiment, a connecting plate is provided between two adjacent guide sleeves, and L-shaped mounting plates are provided on both sides of the mobile trolley centered on the bridge erecting machine body. An electric push rod is mounted on the L-shaped mounting plates, and the movable end of the electric push rod is connected to the connecting plate.

[0010] In one embodiment, the electric actuator is a bidirectional electric actuator.

[0011] In one embodiment, rubber block two and rubber block one are respectively provided on the side of the upper clamping plate and the lower clamping plate that are close to each other.

[0012] In one embodiment, the first guide sleeve, the second guide sleeve, and the first guide rod are all made of high-strength rigid material.

[0013] Beneficial effects: The box girder is conveniently clamped by the cooperation of the upper and lower clamping plates, and then transported to the designated pier by a mobile crane for installation. The method of clamping the box girder by the cooperation of the upper and lower clamping plates has the advantage of high clamping and release efficiency, thereby improving the efficiency of bridge erection. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention in use.

[0015] Figure 2 This is a three-dimensional structural diagram of the mobile overhead crane of this utility model, which lifts the box girder through the upper and lower clamping plates.

[0016] Figure 3 This utility model Figure 2 A schematic diagram of the three-dimensional structure after the removal of the box girder.

[0017] Figure 4 This is a three-dimensional structural diagram of the components of this utility model, including the upper clamping plate, lower clamping plate, motor, and lead screw.

[0018] The markings in the diagram are as follows: 1-Box girder, 2-Pier, 3-Bridge erecting machine body, 4-Mobile gantry crane, 5-Hanging rope, 6-Guide sleeve one, 7-Guide sleeve two, 71-Connecting plate, 8-Guide rod one, 9-Lower clamping plate, 10-Motor, 11-Screw rod, 12-Upper clamping plate, 13-Guide rod two, 14-L-shaped mounting plate, 15-Electric push rod, 16-Rubber block one, 17-Rubber block two. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0020] Example: A bridge erection device, such as Figures 1-4As shown, the bridge erecting machine includes a main body 3, a mobile overhead crane 4, lifting ropes 5, a lower clamping plate 9, and an upper clamping plate 12. The mobile overhead crane 4 is movably mounted on the main body 3, and a crane is mounted on the mobile overhead crane 4. The crane on the mobile overhead crane 4 lifts the box girder 1 and transports it to the designated pier 2 for installation by moving the mobile overhead crane 4 horizontally along the main body 3. An even number of lifting ropes 5 are installed on both sides of the mobile overhead crane 4, centered on the main body 3. The lower ends of the lifting ropes 5 are connected to the lower clamping plate 9. The clamping part of the lower clamping plate 9 is designed to adapt to the side wall of the box girder 1, so that… In use, the clamping part of the lower clamping plate 9 fits tightly against the side wall of the box girder 1. An upper clamping plate 12 is movably installed above the lower clamping plate 9. The upper clamping plate 12 is adapted to the top surface of the box girder 1. The upper clamping plate 12 and the lower clamping plate 9 together clamp one side of the box girder 1. Rubber block 2 17 and rubber block 16 are respectively installed on the side of the upper clamping plate 12 and the lower clamping plate 9 that are close to each other. The installation of rubber block 2 17 and rubber block 16 helps to increase the friction coefficient between the upper clamping plate 12, the lower clamping plate 9 and the box girder 1, thereby preventing the box girder 1 from slipping off the clamping part of the lower clamping plate 9, thereby improving the safety and stability of the moving crane 4 in hoisting the box girder 1.

[0021] like Figure 3 and Figure 4 As shown, guide rods 13 are fixedly installed on the two parallel protrusions at the top of the lower clamping plate 9. The guide rods 13 slide through the upper clamping plate 12, which has a "T" shaped structure. A motor 10 is installed in the hollow part at the bottom of the lower clamping plate 9. A lead screw 11 is connected to the output shaft of the motor 10. The lead screw 11 rotates through the top plane of the lower clamping plate 9 and is threaded through the upper clamping plate 12. It is worth noting that the lead screw 11 is threaded through the intersection of the lines connecting the midpoints of the horizontal and vertical directions of the upper clamping plate 12. The lead screw 11 is set parallel to the guide rod 13, and the guide rod 13 is symmetrically arranged on both sides of the lead screw 11.

[0022] like Figure 2 As shown, guide sleeve 1 6 and guide sleeve 2 7 are sleeved on the hoisting rope 5. Guide sleeve 2 7 is located below guide sleeve 1 6. Guide rod 1 8 is installed on the outer wall of guide sleeve 1 6. Guide rod 1 8 slides through the vertical plate on the outer wall of guide sleeve 2 7. Guide sleeve 1 6, guide sleeve 2 7 and guide rod 1 8 are all made of high-strength rigid material. Through the cooperation of guide sleeve 1 6, guide sleeve 2 7 and guide rod 1 8, the hoisting rope 5 is set in a "Z" shape between the moving crane 4 and the lower clamping plate 9, thereby realizing the function of the clamping part of the lower clamping plate 9 fitting with the side wall of the box girder 1.

[0023] like Figure 3As shown, a connecting plate 71 is provided between two adjacent guide sleeves 7. The moving trolley 4 is provided with L-shaped mounting plates 14 on both sides of the bridge erecting machine body 3. Electric push rods 15 are installed on the L-shaped mounting plates 14. The electric push rods 15 are bidirectional electric push rods. The movable end of the electric push rods 15 is connected to the connecting plate 71. The connecting plate 71 is driven to move horizontally by the telescopic function of the electric push rods 15, thereby adjusting the distance between the clamping part of the lower clamping plate 9 and the side wall of the box girder 1, so as to adapt to box girders 1 of different widths.

[0024] In use, the mobile overhead crane 4 moves horizontally along the bridge erecting machine body 3 to the box girder 1 that needs to be lifted. Then, the extension movement of the electric push rod 15 drives the connecting plate 71 to move, which in turn drives the guide sleeve 7 to move horizontally along the guide rod 8. This allows the distance between the two lower clamping plates 9 to be adjusted according to the width of the box girder 1 until the clamping part of the lower clamping plate 9 is located on the outside of the side wall of the box girder 1. Then, the retraction movement of the electric push rod 15 makes the clamping part of the lower clamping plate 9 tightly adhere to the side wall of the box girder 1. Then, the motor 10 drives the lead screw 11 to rotate, thereby driving the upper clamping plate 12 to move up and down along the guide rod 13 until the upper clamping plate 12 abuts against the top surface of the box girder 1. This achieves the function of conveniently clamping the box girder 1. Finally, the mobile overhead crane 4 moves horizontally along the bridge erecting machine body 3 to move the box girder 1 to the designated pier 2 for installation. After installation, the motor 10 drives the lead screw 11 to reverse, and the upper clamping plate 12 moves upward along the guide rod 13 to release the clamping function of the box girder 1. Then, through the extension movement of the electric push rod 15, the clamping part of the lower clamping plate 9 moves away from the side wall of the box girder 1. Finally, the crane 4 returns to the original position of the bridge erecting machine body 3 or prepares for the next cycle of work, thus conveniently completing the erection task of a section of box girder 1.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A bridge erection device, comprising a bridge erecting machine body (3), wherein a mobile gantry crane (4) is movably mounted on the bridge erecting machine body (3), the mobile gantry crane (4) being used to lift a box girder (1) and install the box girder (1) onto a designated pier (2) by moving it horizontally along the bridge erecting machine body (3), wherein the mobile gantry crane (4) is provided with at least two lifting ropes (5) on both sides centered on the bridge erecting machine body (3), characterized in that: The lower end of the hoisting rope (5) is connected to a lower clamping plate (9). One side of the lower clamping plate (9) is configured to adapt to the side wall of the box girder (1). An upper clamping plate (12) is movably arranged on the lower clamping plate (9). The upper clamping plate (12) is adapted to the top surface of the box girder (1). The upper clamping plate (12) and the lower clamping plate (9) together enclose and clamp one side of the box girder (1).

2. The bridge erection device as described in claim 1, characterized in that: The number of the suspension ropes (5) is set to an even number.

3. The bridge erection device as described in claim 2, characterized in that: The lower clamping plate (9) is symmetrically provided with guide rods 2 (13) at the top. The guide rods 2 (13) slide through the upper clamping plate (12). The lower part of the lower clamping plate (9) is provided with a motor (10). The output shaft of the motor (10) is connected to a lead screw (11). The lead screw (11) rotates through the top plane of the lower clamping plate (9) and is threaded through the upper clamping plate (12).

4. A bridge erection device as described in claim 3, characterized in that: The suspension rope (5) is fitted with a first guide sleeve (6) and a second guide sleeve (7). The second guide sleeve (7) is located below the first guide sleeve (6). A first guide rod (8) is installed on the outer wall of the first guide sleeve (6). The first guide rod (8) slides through the vertical plate on the outer wall of the second guide sleeve (7).

5. A bridge erection device as described in claim 4, characterized in that: A connecting plate (71) is provided between two adjacent guide sleeves (7). The mobile crane (4) is provided with L-shaped mounting plates (14) on both sides of the bridge erecting machine body (3). Electric push rods (15) are installed on the L-shaped mounting plates (14). The movable end of the electric push rod (15) is connected to the connecting plate (71).

6. A bridge erection device as described in claim 5, characterized in that: The electric push rod (15) is a bidirectional electric push rod.

7. A bridge erection device as described in claim 6, characterized in that: Rubber block two (17) and rubber block one (16) are respectively provided on the side of the upper clamping plate (12) and the lower clamping plate (9) that are close to each other.

8. A bridge erection device as described in claim 7, characterized in that: The first guide sleeve (6), the second guide sleeve (7), and the first guide rod (8) are all made of high-strength rigid material.

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