A method for quick replacement of large bridge crane under restricted space conditions

Abstract

The present application belongs to the field of bridge crane replacement, and mainly relates to a large-scale bridge crane quick replacement method under restricted space conditions, comprising the following steps: installing a support beam below the crane, installing a lifting beam at a certain height above the crane, installing multiple towers on different module vehicles, moving the module vehicles to the two sides of the old crane, and supporting under the lifting beam; placing a lifting device above the lifting beam and connecting with the bottom support beam, lifting the support beam and the old crane to a certain height; after rotating the old crane by a certain angle in place by the module vehicle, the lifting device lowers the old crane, and the disassembly is completed; repeating the above steps to install a new crane. In the restricted working space, the module vehicle and the tower combination are used to replace the bridge crane through the in-place rotation mode, the occupied space is small, the modular disassembly is used, the construction time is effectively shortened, the efficiency is improved, and the method is suitable for construction of various sizes and scenes.

Description

Technical Field

[0001] This invention relates to the field of bridge crane replacement, and more particularly to a method for rapid replacement of large bridge cranes under confined space conditions. Background Technology

[0002] Common methods for replacing and disassembling large cranes include traditional methods, overall lifting and relocation, and crawler crane methods, but each method has significant drawbacks. Traditional methods involve disassembling the crane, transporting it, and then reassembling it, which is time-consuming and costly. Disassembling and assembling crawler cranes is also extremely complicated, requiring large auxiliary cranes and open spaces. Their complex structure and aging components make disassembly and assembly work inconvenient and prone to accidents. Furthermore, improper disassembly sequence or destructive removal methods on corroded parts can damage the equipment structure and lead to serious accidents such as boom breakage and overturning of the entire machine. Summary of the Invention

[0003] To address the above problems, this invention proposes a method for rapid replacement of large bridge cranes under confined space conditions. This method eliminates the need for crane operation during the replacement of large bridge cranes, and allows for one-time installation and dismantling of equipment, thus shortening the construction period and saving construction costs.

[0004] This application proposes a method for rapid replacement of large bridge cranes under confined space conditions, including the following steps: S1. Demolition of the old crane A support beam is installed under the old crane, and a lifting beam is installed at a certain height above the old crane. Multiple towers are installed on different modular vehicles, which move to both sides of the old crane with the modular vehicles and are supported under the lifting beam. Place the lifting device above the lifting beam and connect it to the bottom support beam to lift the support beam and the old crane to a certain height; After the modular vehicle drives the old crane to rotate in place at a certain angle, the hoist lowers the old crane to complete the dismantling. S2, New Crane Installation The control lift lowers the support beam, and the new crane is placed on top of the support beam; The control lifter raises the support beam and the new crane to a certain height; After the modular vehicle drives the new crane to rotate in place at a certain angle, the hoist lowers the new crane to complete the installation.

[0005] Furthermore, the installation of the lifting beam includes setting up multiple lifting points on the roof and hoisting the lifting beam above the crane.

[0006] Furthermore, the hoist is connected to the support beam via a lead screw. The upper end of the lead screw passes through the hoist, and the lower end is fixed to the support beam. The lead screw can move up and down vertically along the hoist.

[0007] Furthermore, the hoist is a hydraulic hoist.

[0008] Furthermore, the number of lifting beams is at least two, with the two lifting beams located on both sides of the crane, and the multiple modular vehicles supported below the lifting beams on both sides.

[0009] Furthermore, both ends of the lifting beam are respectively mounted on the towers on both sides of the crane. Furthermore, the multiple modular vehicles rotate together around the crane.

[0010] Furthermore, the tower supports the lifting beam and rotates together with the module vehicle.

[0011] Furthermore, the lifting height of the crane is 50-100mm.

[0012] Furthermore, the rotation angle of the crane is in the range of 0-180°.

[0013] The beneficial effects of this invention are as follows: compared with conventional methods, there is no need to demolish the factory roof, and the preliminary preparation work does not take up production time, allowing for crane modification; it reduces construction measures and costs, and the installation and dismantling of the crane can be completed in one go, with no special requirements for the machine position, and has a wide range of applications; this process is safe and reliable, solves the problem of difficult on-site installation and replacement, reduces labor and equipment costs, and optimizes construction efficiency; it ensures the rapid recovery capability of the production line, guarantees the construction period, and avoids safety hazards caused by complex environments. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A flowchart illustrating a method for quick replacement of a large bridge crane under confined space conditions, provided in an embodiment of this application; Figure 2 This application provides an embodiment of an installation diagram of the device in a method for quick replacement of a large bridge crane under confined space conditions. Figure 3 This is a schematic diagram of the elevator structure; Figure 4 A schematic diagram for the installation of the lifting beam; Figure 5 To illustrate the lifting and positioning of the beam; Figure 6 Diagram showing the tower in place; Figure 7 Diagram showing the lifting of the bottom support beam; Figure 8 Diagram showing a modular vehicle driving a crane to rotate; Figure 9 Diagram showing the removal of an old crane after rotation; 1. Lifting beam; 2. Tower; 3. Modular vehicle; 4. Support beam; 5. Lifter; 6. Lead screw; 7. Crane. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other implementations obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. In the various drawings, the same elements are represented by the same or similar reference numerals, and for clarity, the various parts in the drawings are not drawn to scale.

[0017] See Figure 1-9 As shown, this invention proposes a method for rapid replacement of large bridge cranes under confined space conditions, characterized by comprising: This application proposes a method for rapid replacement of large bridge cranes under confined space conditions, including the following steps: S1. Demolition of the old crane S11. Install a support beam under the old crane and a lifting beam at a certain height above the old crane. Multiple towers are installed on different modular vehicles and moved with the modular vehicles to both sides of the old crane and supported under the lifting beam. S12. Place the lifting device above the lifting beam and connect it to the bottom support beam to lift the support beam and the old crane to a certain height; S13. After the old crane is rotated in place by the modular vehicle to a certain angle, the hoist lowers the old crane to complete the demolition. S2, New Crane Installation S21. Control the lifting device to lower the support beam, and place the new crane on top of the support beam; S22. Control the lifting device to lift the support beam and the new crane to a certain height; S23. After the new crane is rotated in place by the modular vehicle to a certain angle, the hoist lowers the new crane to complete the installation.

[0018] See Figure 4-5 As shown, specifically, installing the lifting beam includes setting multiple lifting points on the roof to hoist the lifting beam above the old crane and the new crane. In this embodiment, by setting multiple lifting points on the steel structure roof, the lifting beam is raised to a position higher than the crane frame, with the crane located directly below the lifting beam. The tower is moved to both sides of the crane using the modular vehicle. After the tower is in place, the lifting beam is placed on top of the tower, and a hydraulic lifter is placed on top of the lifting beam. The hydraulic lifter then lifts the support beam located at the bottom of the bridge crane, which serves as the lifting carrier for the crane and is simultaneously lifted together with the crane.

[0019] See Figure 3 As shown, specifically, the hoist is connected to the support beam via a lead screw. The upper end of the lead screw passes through the hoist, and the lower end is fixed to the support beam. The lead screw can move vertically up and down along the hoist. Specifically, the hoist is a hydraulic hoist. In this embodiment, openings are provided at the center of the lifting beams on both sides. A support is provided under the hoist, and the support is fixed above the lifting beam. The lead screw passes through the lifting beam and the support. The upper end of the lead screw is connected to the hoist and is lifted by the action of the hoist. The lower end of the lead screw is fixed to the support beam at the bottom, driving the support beam and the crane above the support beam to lift together. Through precise control of the hydraulic hoist, the support beam can move smoothly in the vertical direction, thereby ensuring the safety and reliability of the entire lifting process.

[0020] See Figure 2 As shown, specifically, there are at least two lifting beams, located on both sides of the crane, with multiple modular vehicles supported below them. Specifically, the two ends of each lifting beam are mounted on towers on both sides of the crane. Specifically, the multiple modular vehicles rotate together around the crane. Specifically, the towers support the lifting beams and rotate with the modular vehicles. In this embodiment, there are two lifting beams and two modular vehicles, arranged perpendicularly to the two lifting beams in the horizontal direction. Each modular vehicle has two towers, and four towers are supported at both ends of the two lifting beams. The two modular vehicles rotate synchronously around the crane, driving the towers and thus the lifting beams to rotate together. Specifically, the crane's rotation angle is within the range of 0-180°.

[0021] Preferably, the lifting height of the crane is 50-100mm. The lifting height of the crane is greater than the height of the crane rail; in this embodiment, the rail height is 28.9mm.

[0022] Specifically, the rotation angle of the crane is within the range of 0-180°. Specifically, the installation height of the lifting beam is at least 100mm higher than both the old crane and the new crane.

[0023] The beneficial effects of this invention are as follows: compared with conventional methods, there is no need to demolish the factory roof, and the preliminary preparation work does not take up production time, allowing for crane modification; it reduces construction measures and costs, and the installation and dismantling of the crane can be completed in one go, with no special requirements for the machine position, and has a wide range of applications; this process is safe and reliable, solves the problem of difficult on-site installation and replacement, reduces labor and equipment costs, and optimizes construction efficiency; it ensures the rapid recovery capability of the production line, guarantees the construction period, and avoids safety hazards caused by complex environments.

[0024] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be noted that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] It should be noted that the above embodiments are illustrative of this disclosure and not restrictive, and that alternative embodiments can be devised by those skilled in the art without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This disclosure can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims listing several systems, several of these systems can be embodied by the same item of hardware. Finally, it should be noted that the above embodiments are obviously merely examples for clearly illustrating the invention and are not intended to limit the implementation. Those skilled in the art will find that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for rapid replacement of large bridge cranes under confined space conditions, characterized in that, Includes the following steps: S1. Demolition of the old crane A support beam is installed under the old crane, and a lifting beam is installed at a certain height above the old crane. Multiple towers are installed on different modular vehicles, which move to both sides of the old crane with the modular vehicles and are supported under the lifting beam. Place the lifting device above the lifting beam and connect it to the bottom support beam to lift the support beam and the old crane to a certain height; After the modular vehicle drives the old crane to rotate in place at a certain angle, the hoist lowers the old crane to complete the dismantling. S2, New Crane Installation The control lift lowers the support beam, and the new crane is placed on top of the support beam; The control lifter raises the support beam and the new crane to a certain height; After the modular vehicle drives the new crane to rotate in place at a certain angle, the hoist lowers the new crane to complete the installation.

2. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 1, characterized in that, The installation of the lifting beam includes setting up multiple lifting points on the roof and hoisting the lifting beam above the crane.

3. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 1, characterized in that, The hoist is connected to the support beam via a lead screw. The upper end of the lead screw passes through the hoist, and the lower end is fixed to the support beam. The lead screw can move up and down vertically along the hoist.

4. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 3, characterized in that, The hoist is a hydraulic hoist.

5. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 1, characterized in that, The number of lifting beams is at least two, with the two lifting beams located on both sides of the crane, and the multiple modular vehicles supported under the lifting beams on both sides.

6. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 5, characterized in that, The two ends of the lifting beam are respectively installed on the tower on both sides of the crane.

7. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 5, characterized in that, Multiple modular vehicles rotate together around the crane.

8. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 7, characterized in that, The tower supports the lifting beam and rotates together with the modular vehicle.

9. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 1, Its features are, The lifting height of the crane is 50-100mm.

10. The method for rapid replacement of large bridge cranes under confined space conditions according to claim 1, characterized in that, The crane's rotation angle is in the range of 0-180°.

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