Traveling type steel box girder first section support dismantling device

Abstract

A traveling type steel box girder first section support dismantling device comprises an operation platform, the operation platform is installed on a girder face of a steel box girder in the transverse bridge direction, traveling wheels used for traveling on the girder face in the longitudinal bridge direction are installed at the bottom of the operation platform, and the two ends of the operation platform stretch out in a transverse overhanging mode relative to the girder face of the steel box girder. The two ends of the operation platform are respectively provided with a hoisting winch, hoisting cables of the hoisting winches are connected with a hoisting cross beam of the first-section support, and the two sides of the operation platform in the longitudinal bridge direction are respectively connected with a first walking winch and a second walking winch which control the operation platform to walk in the longitudinal bridge direction. A first pulling cable of the first walking winch is connected with one side of the operation platform, a second pulling cable of the second walking winch is connected with the other side of the operation platform, and the first walking winch and the second walking winch are fixedly installed on the steel box girder and connected with a controller in a matched mode. The dismounting device walks by winding and unwinding the steel wire rope through the two winches, and is convenient to mount and high in turnover utilization rate.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction equipment, in particular to a movable steel box girder first section bracket removal device. Background Art

[0002] With the continuous development of highway construction, prefabricated beams are widely used in the construction of bridge superstructures, and steel box beams are also widely used in interchange hub projects. Steel box beams are also called steel plate box beams. Steel box beams are a common structural form for large-span bridges. They are generally used on bridges with larger spans. Because they look like a box, they are called steel box beams. Steel box beams are generally connected by a full welding method, including top plates, bottom plates, web plates, diaphragms, longitudinal diaphragms, and stiffening ribs. In bridge steel structures, due to the requirements of functional use and bearing capacity, more and more steel box bridges are developing in the direction of large spans and large cross-sections. Considering the performance of hoisting equipment and construction costs, steel box bridges are generally manufactured in factories according to sections, and then transported to the construction site for segmented hoisting. They are hoisted to the brackets section by section, and assembled and welded to form a whole.

[0003] After the steel box girder is erected, the first section of the bottom bracket of the steel box girder is removed. Most of the time, a crane that meets the lifting requirements is used to lift and unload the bridge to the ground on both sides simultaneously. The use of special equipment for lifting has the disadvantages of high rental costs, high requirements for site conditions on the construction site, and low work efficiency. In addition, the simultaneous operation of two cranes also requires high operating ability of personnel, and there are many uncertain factors. The removal process is complicated and inconvenient to operate. Therefore, people have developed a device for removing bridge brackets, such as:

[0004] 1. Chinese Patent: A bridge support removal device, application number: 202320716934.X, application date: 2023.04.04, abstract: The utility model belongs to the field of bridge construction machinery, and specifically relates to a bridge support removal device; it includes two sets of winches, the two sets of winches are fixed on an operating platform across the beam surface, the two ends of the operating platform are cantilevered horizontally relative to the beam surface, and a set of fixed pulleys are arranged at each end; the operating platform can move longitudinally along the beam surface; the wire rope of the winch is redirected by the fixed pulley and then connected to the horizontal lifting beam; the bridge support is fixed under the lifting beam for lifting by the lifting wire rope; the bridge support removal device provided by the utility model solves the problem that it is difficult to remove the support by a tower crane or a crane and some areas cannot be removed. The device is easy to manufacture, has a fast speed of removing the support, and has high safety, which ensures the efficiency and safety of the support removal. It has a broad prospect of promotion and application, and is suitable for various support removal constructions, especially for high pier support removal constructions.

[0005] Through application research, it is found that the bridge support removal device disclosed in the above document needs to be equipped with an electric trolley and a track. The electric trolley and the track are customized special devices, which are rarely used in bridge construction, have a low turnover rate, and are inconvenient to install. Therefore, it is necessary to improve the design of the above bridge support removal device. Summary of the invention

[0006] The utility model aims to provide a movable steel box girder first section bracket removal device, which realizes the movement of the device by retracting and releasing steel wire ropes through two winches, is easy to install, and has a high turnover rate of components.

[0007] In order to achieve the purpose of this utility model, the technical solution adopted is:

[0008] A movable steel box girder first section support removal device comprises an operating platform, wherein the operating platform is installed on the beam surface of the steel box girder in the transverse direction, and the bottom of the operating platform is provided with walking wheels for walking in the longitudinal direction on the beam surface, and both ends of the operating platform are cantilevered out transversely relative to the beam surface of the steel box girder, and a lifting winch is installed at both ends of the operating platform, and the lifting rope of the lifting winch is connected to the lifting crossbeam of the first section support of the steel box girder, and the longitudinal sides of the operating platform are respectively connected with a No. 1 walking winch and a No. 2 walking winch for controlling the longitudinal movement of the operating platform, and the No. 1 pulling rope of the No. 1 walking winch is connected to one side of the operating platform, and the No. 2 walking winch is connected to the No. 1 pulling rope of the No. 1 walking winch. The No. 2 pulling rope of the winch is connected to the other side of the operating platform. Both the No. 1 traveling winch and the No. 2 traveling winch are installed and fixed to the steel box girder. The No. 1 traveling winch and the No. 2 traveling winch are matched and connected with a controller. The controller controls the No. 1 traveling winch and the No. 2 traveling winch to work in reverse and synchronously, that is, when the controller controls the No. 1 traveling winch to reel in the No. 1 pulling rope, the No. 2 traveling winch synchronously releases the No. 2 pulling rope; when the controller controls the No. 2 traveling winch to reel in the No. 2 pulling rope, the No. 1 traveling winch synchronously releases the No. 1 pulling rope; the controller is also matched with the two lifting winches for synchronous control, and the controller controls the two lifting winches to synchronously reel in or release the lifting ropes.

[0009] Further preferred: the No. 1 walking winch and the No. 2 walking winch are respectively fixed to the steel box girder through the walking winch mounting frame, and the No. 1 walking winch and the No. 2 walking winch are installed in the middle position of the corresponding walking winch mounting frame. Ear plates are provided below the two ends of the walking winch mounting frame, and through holes are provided on the ear plates. Fixing nuts are welded at the through holes, and locking bolts for top connection with the side of the steel box girder are installed in the fixing nuts. Tightening the locking bolts on both sides to top-connect with the steel box girder can realize the fixed connection between the walking winch mounting frame and the steel box girder. In order to reduce damage to the side of the steel box girder, a spacer is provided on the top connection surface between the locking bolt and the steel box girder. The setting of the walking winch mounting frame can quickly connect and fix the No. 1 walking winch and the No. 2 walking winch to the steel box girder, and it is also convenient for the No. 1 walking winch and the No. 2 walking winch to be disassembled and used for turnover.

[0010] Further preferred: the operating platform includes two main beams arranged in parallel, the two ends of the two main beams are connected to cross beams respectively, the walking wheels are respectively installed at the bottom of the two main beams, and the two lifting winches are respectively suspended and installed at the two ends of the two main beams through the lifting winch mounting frames. The distance between the two main beams only needs to meet the installation requirements of the lifting winch, and the length of the main beam is determined according to the width of the steel box girder bridge + the winch construction and the width of the cantilever working platform.

[0011] Further preferred: the hoisting winch mounting frame is horizontally erected at both ends between the two main beams, and the two ends of the hoisting winch mounting frame are connected to the main beams by bolts, which is convenient for disassembly of the hoisting winch and the turnover of the hoisting winch.

[0012] Further preferably, a truss is connected between the two main beams. The truss is made of I-beams and welded between the two main beams in the form of scissor braces to ensure stability.

[0013] The present movable steel box girder first section bracket removal device is to install an operating platform in the transverse direction of the steel box girder beam surface, and the bottom of the operating platform is equipped with walking wheels for walking in the longitudinal direction of the beam surface, and both ends of the operating platform are cantilevered out transversely relative to the beam surface of the steel box girder, and a lifting winch is installed at both ends of the operating platform, and the lifting rope of the lifting winch is connected to the lifting crossbeam of the first section bracket of the steel box girder, and the longitudinal sides of the operating platform are respectively connected with a No. 1 walking winch and a No. 2 walking winch for controlling the longitudinal movement of the operating platform, and a No. 1 pulling rope of the No. 1 walking winch is connected to the No. 1 pulling rope of the No. 1 walking winch. It is connected to one side of the operating platform, and the No. 2 pulling rope of the No. 2 walking winch is connected to the other side of the operating platform. The No. 1 walking winch and the No. 2 walking winch are both installed and fixed to the steel box girder. The No. 1 walking winch and the No. 2 walking winch are matched and connected with a controller. The controller controls the No. 1 walking winch and the No. 2 walking winch to work in reverse and synchronously. After the first section of the steel box girder is lifted, the No. 1 walking winch and the No. 2 walking winch are used to control the operating platform to move longitudinally away from the projection surface of the lower support, and it is slowly unloaded to the ground through the lifting device to complete the removal of the first section of the support. The No. 1 walking winch and the No. 2 walking winch are combined to control the operating platform to walk on the longitudinal bridge beam surface, while reducing the transverse deviation of the operating platform. The set walking winch mounting frame can quickly connect and fix the No. 1 walking winch and the No. 2 walking winch to the steel box girder, and it is also convenient for the No. 1 walking winch and the No. 2 walking winch to be disassembled and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of the first section support removal device of the movable steel box girder;

[0015] Figure 2 This is a schematic diagram of the installation relationship between the hoisting winch and the steel box girder;

[0016] Figure 3 This is a schematic diagram of the installation relationship between the traveling winch and the steel box girder;

[0017] The names corresponding to the numbers in the figure are:

[0018] 1. Locking bolt; 2. Fixing nut; 3. Ear plate; 4. Travel winch mounting frame; 5. No. 1 travel winch; 6. No. 1 pulling rope; 7. Main beam; 8. Lifting winch mounting frame; 9. Lifting winch; 10. Crossbeam; 11. Travel wheel; 12. Truss; 13. No. 2 pulling rope; 14. No. 2 travel winch; 15. Controller; 16. Lifting rope; 17. Steel box beam. DETAILED DESCRIPTION

[0019] In order to make the technical solution and advantages of the present application more clear, the technical solution is clearly and completely described below in conjunction with embodiments. Example

[0020] A movable steel box girder first section support removal device comprises an operating platform, wherein the operating platform is installed on the beam surface of the steel box girder 17 in the transverse direction, and a traveling wheel 11 for traveling in the longitudinal direction on the beam surface is installed at the bottom of the operating platform, and both ends of the operating platform are cantilevered laterally relative to the beam surface of the steel box girder 17, and a lifting winch 9 is installed at both ends of the operating platform, and the lifting rope 16 of the lifting winch 9 is connected to the lifting crossbeam of the first section support of the steel box girder, and the longitudinal sides of the operating platform are respectively connected with a No. 1 walking winch 5 and a No. 2 walking winch 14 for controlling the longitudinal travel of the operating platform, the No. 1 pulling rope 6 of the No. 1 walking winch 5 is connected to one side of the operating platform, and the No. 2 pulling rope 13 of the No. 2 walking winch 14 is connected to the operating platform. The other side of the working platform is connected, the No. 1 walking winch 5 and the No. 2 walking winch 14 are both installed and fixed with the steel box girder 17, and the No. 1 walking winch 5 and the No. 2 walking winch 14 are matched and connected with a controller 15, and the controller 15 controls the No. 1 walking winch 5 and the No. 2 walking winch 14 to work in reverse and synchronously, that is, when the controller 15 controls the No. 1 walking winch 5 to reel in the No. 1 pulling rope 6, the No. 2 walking winch 14 synchronously releases the No. 2 pulling rope 13; when the controller 15 controls the No. 2 walking winch 14 to reel in the No. 2 pulling rope 13, the No. 1 walking winch 5 synchronously releases the No. 1 pulling rope 6; the controller 15 is also matched with the two lifting winches 9 for synchronous control, and the controller 15 controls the two lifting winches 9 to synchronously reel in or release the lifting rope 16.

[0021] The No. 1 traveling winch 5 and the No. 2 traveling winch 14 are respectively installed and fixed to the steel box girder 17 through the traveling winch mounting frame 4. The No. 1 traveling winch 5 and the No. 2 traveling winch 14 are installed in the middle position of the corresponding traveling winch mounting frame 4. Ear plates 3 are provided below the two ends of the traveling winch mounting frame 4. Through holes are provided on the ear plates 3. Fixing nuts 2 are welded at the through holes. Locking bolts 1 for contacting with the side of the steel box girder 17 are installed in the fixing nuts 2. By tightening the locking bolts 1 on both sides and contacting with the steel box girder 17, the traveling winch mounting frame 4 and the steel box girder 17 can be fixedly connected. In order to reduce damage to the side of the steel box girder 17, a spacer is provided at the top connection surface between the locking bolts 1 and the steel box girder 17.

[0022] The operating platform includes two parallel arranged main beams 7, the two ends of the two main beams 7 are connected to cross beams 10 respectively, and the walking wheels 11 are respectively installed at the bottom of the two main beams 7. Two lifting winches 9 are respectively suspended and installed at the two ends between the two main beams 7 through lifting winch mounting frames 8. The spacing between the two main beams 7 only needs to meet the installation requirements of the lifting winch 9. The length of the main beam 7 is determined according to the width of the steel box girder bridge + winch construction and the width of the cantilever working platform.

[0023] The hoisting winch mounting frame 8 is horizontally mounted at both ends between the two main beams 7, and both ends of the hoisting winch mounting frame 8 are connected to the main beams 7 by bolts.

[0024] A truss 12 is connected between the two main beams 7. The truss 12 is made of I-beams and welded between the two main beams 7 in the form of scissor braces to ensure stability.

[0025] When the steel box girder support is erected, the I-beam connecting support is welded and fixed to the first section of the temporary support, that is, the hoisting crossbeam is welded and fixed to the first section of the temporary support, and the bottom of the beam is supported by the beam bottom support steel pipe. When the steel box girder is dismantled after the joint construction, the movable steel box girder first section support removal device is used for removal and lifting. The implementation steps of this movable steel box girder first section support removal device are as follows:

[0026] Step 1: Complete the processing of all structural components according to the design dimensions and transport them to the construction site for installation.

[0027] Step 2: First, connect the main beam and the running wheels, and evenly and symmetrically arrange two running wheels on each main beam.

[0028] Step 3: After fixing the main beam, install and weld the beams at both ends. According to the position of the formed main beam, use steel of appropriate length to perform diagonal welding to connect the beams to form an overall structure.

[0029] Step 4: According to the vertical lifting position of the bracket, install the lifting winch on the main beam through the lifting winch mounting frame to complete the installation of the winch operating platform.

[0030] Step 5. Install No. 1 and No. 2 traveling winches at appropriate positions on both sides of the longitudinal bridge of the operating platform. Fix No. 1 and No. 2 traveling winches to the steel box girder through the traveling winch mounting frame to control the travel of the operating platform. Before installing the bracket, complete the machine test to ensure stable operation of the equipment.

[0031] Step 6: Connect the lifting rope of the lifting winch to the lifting beam.

[0032] Step 7: Cut off the supporting steel pipe at the bottom of the beam so that the first section of the bracket has space to move up and down.

[0033] Step 8. Start the lifting winch to lift the bracket to separate the first section of the bracket. The last walking winch and the second walking winch pull the operating platform forward until the first section of the bracket leaves the projection surface of the lower bracket, and then slowly unload it to the ground to complete the removal of the first section of the bracket.

[0034] The above description is not a limitation of the present application, and the present application is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present application should fall within the scope of protection of the present application.

Claims

1. A movable steel box girder first section support removal device, comprising an operating platform, the operating platform is installed on the beam surface of the steel box girder (17) in the transverse direction, the bottom of the operating platform is equipped with walking wheels (11) for walking on the beam surface in the longitudinal direction, the two ends of the operating platform are cantilevered out transversely relative to the beam surface of the steel box girder (17), a lifting winch (9) is installed at each end of the operating platform, and the lifting rope (16) of the lifting winch (9) is connected to the lifting crossbeam of the first section support of the steel box girder, characterized in that: The longitudinal bridge of the operating platform is respectively connected to a No. 1 walking winch (5) and a No. 2 walking winch (14) for controlling the longitudinal bridge of the operating platform to travel in a direction. The No. 1 pulling rope (6) of the No. 1 walking winch (5) is connected to one side of the operating platform, and the No. 2 pulling rope (13) of the No. 2 walking winch (14) is connected to the other side of the operating platform. The No. 1 walking winch (5) and the No. 2 walking winch (14) are both fixedly mounted on the steel box girder (17), and the No. 1 walking winch (5) and the No. 2 walking winch (14) are matched and connected to a controller (15).

2. The movable steel box girder first section bracket removal device according to claim 1 is characterized in that: The No. 1 traveling hoist (5) and the No. 2 traveling hoist (14) are respectively fixed to the steel box girder (17) through the traveling hoist mounting frame (4). The No. 1 traveling hoist (5) and the No. 2 traveling hoist (14) are mounted at the middle position of the corresponding traveling hoist mounting frame (4). Ear plates (3) are arranged below the two ends of the traveling hoist mounting frame (4). Through holes are arranged on the ear plates (3). Fixing nuts (2) are welded at the through holes. Locking bolts (1) for contacting the side of the steel box girder (17) are installed in the fixing nuts (2). By tightening the locking bolts (1) on both sides to contact the steel box girder (17), the traveling hoist mounting frame (4) and the steel box girder (17) can be fixedly connected.

3. The movable steel box girder first section bracket removal device according to claim 1 is characterized in that: The operating platform comprises two main beams (7) arranged in parallel, the two ends of the two main beams (7) are respectively connected to cross beams (10), the running wheels (11) are respectively installed at the bottom of the two main beams (7), and the two hoisting winches (9) are respectively suspended and installed at the two ends between the two main beams (7) through hoisting winch mounting frames (8).

4. The movable steel box girder first section bracket removal device according to claim 3 is characterized in that: The hoisting winch mounting frame (8) is respectively transversely mounted at the two ends between the two main beams (7), and the two ends of the hoisting winch mounting frame (8) are connected to the main beams (7) by bolts.

5. The movable steel box girder first section bracket removal device according to claim 3 is characterized in that: A truss (12) is connected between the two main beams (7).

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