Method of installing a cable suspended crane

Abstract

This application provides a method for installing a cable-mounted crane, comprising the following steps: preparing various components of the cable-mounted crane; cantilevering the main tower gantry along the bridge direction, extending the main tower gantry along the bridge direction outside the main tower, and installing a winch hoisting device on the main tower gantry; using the winch hoisting device to hoist the traveling mechanism of the cable-mounted crane onto the main cable for installation; using the winch hoisting device to hoist the main beam truss of the cable-mounted crane onto the traveling mechanism installed on the main cable and connecting and fixing it to the traveling mechanism; using the winch hoisting device to sequentially hoist the lifting system, hydraulic pump station, and control room of the cable-mounted crane into the main beam truss, and connecting the steel strands of the lifting system to the lifting device to complete the installation of the cable-mounted crane. The installation method of this application is convenient to operate and has high construction safety.

Description

Technical Field

[0001] This application relates to the field of cable-mounted crane technology, and more particularly to an installation method for a cable-mounted crane. Background Technology

[0002] Cable-stayed cranes are crucial equipment for the erection of steel beams in suspension bridges, and their installation efficiency directly impacts the construction schedule. Typically, cable-stayed cranes are used to install the traveling mechanism and the main girder truss separately. However, the main girder truss structure is large, and directly connecting it to the traveling mechanism significantly increases installation difficulty, prolonging high-altitude assembly time. Furthermore, the large weight required for lifting by the winch, coupled with prolonged heavy loads, can severely damage the winch's braking system, increasing the risks associated with component assembly and ultimately affecting the construction efficiency of the suspension bridge. Summary of the Invention

[0003] The purpose of this application is to provide an installation method for a cable-mounted crane, which solves the problem of increasing the load on the hoisting equipment and affecting construction safety by installing the main beam truss by splitting it into intermediate truss beams and box-type load-bearing beams.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A method for installing a cable-mounted crane includes the following steps:

[0006] Prepare the traveling mechanism, main beam truss, and lifting system for the cable-mounted crane. The traveling mechanism is connected to the main cable, the main beam truss is installed on the traveling mechanism, and the lifting system is installed on the main beam truss.

[0007] The main tower gantry is cantilevered along the bridge direction, and the main tower gantry extends outward along the bridge direction, and a hoisting device is installed on the main tower gantry;

[0008] The traveling mechanism of the cable-borne crane is hoisted onto the main cable using the hoisting equipment for installation.

[0009] The hoisting equipment is used to lift the main beam truss of the cable-mounted crane onto the traveling mechanism installed on the main cable and to connect and fix it to the traveling mechanism.

[0010] The hoisting system, hydraulic pump station, and control room of the cable-mounted crane are sequentially lifted into the main beam truss using a winch lifting device, and the steel strands of the hoisting system are connected to the lifting equipment to complete the installation of the cable-mounted crane.

[0011] Further configuration: The preparation of various components for the cable-mounted crane includes: after manufacturing the cable-mounted crane as a whole in the factory and conducting tests, disassembling the cable-mounted crane into individual components and transporting them to the construction site; assembling the individual components of the cable-mounted crane into standard sections using tower cranes and truck cranes; transferring the various components of the cable-mounted crane to barges; and transporting the various components of the cable-mounted crane to the vicinity of the main tower for hoisting construction.

[0012] Further configuration: Two sets of main tower gantry frames are installed at the top of the main tower. Each set of main tower gantry frames is equipped with a winch lifting device. The winch lifting devices on the two sets of main tower gantry frames correspond to the hoisting of the traveling mechanism of the cable-borne crane on the two main cables.

[0013] Further configuration: When using the hoisting equipment to lift the traveling mechanism of the cable-borne crane to the main cable, the traveling mechanism is raised above the main cable, and the position of the traveling mechanism is adjusted to transfer the traveling mechanism to the main cable. The main cable is then tightened by the replaceable support clamp device of the traveling mechanism to complete the connection between the traveling mechanism and the main cable.

[0014] Further configuration: After the main cable is secured by the replaceable support clamp device of the traveling mechanism, an anchor point for the traction jack is installed at a preset position away from the traveling mechanism, and a steel strand is threaded between the traction jack and the anchor point so that the traveling mechanism can be moved axially along the main cable by the traction jack.

[0015] Further configuration: The main beam truss of the cable-mounted crane includes a middle truss beam and two box-type load-bearing beams. When the main beam truss of the cable-mounted crane is hoisted to the traveling mechanism using the hoisting equipment, the two box-type load-bearing beams at the ends of the main beam truss are first hoisted onto the two traveling mechanisms and fixed by connecting them with pins. Then, the middle truss beam is hoisted between the two box-type load-bearing beams and connected to the two box-type load-bearing beams with high-strength bolts to complete the connection and fixation between the main beam truss and the traveling mechanism.

[0016] Further configuration: The intermediate truss beam includes multiple box girder segments bolted together with high-strength bolts. When hoisting the intermediate truss beam, the multiple box girder segments are first assembled on the ground to form an integral intermediate truss beam, and then hoisted as a whole by a winch lifting device.

[0017] Further setup: When connecting the steel strand of the lifting system to the lifting device, use a winch to lift the device to the position of the lower crossbeam of the main tower. Pass the steel strand of the lifting system's take-up and release device through the lifting jack and lower the anchor head of the steel strand to the lower crossbeam to connect the anchor head of the steel strand with the lifting device. Then, use the lifting jack to lift the device to the vicinity of the top of the tower.

[0018] Further configuration: The lifting device includes a spreader beam, a spreader beam slide box, a lifting anchor seat, movable lifting lugs, and a center-of-gravity adjusting jack. The lifting anchor seat is installed on the spreader beam slide box and is connected to the anchor head of the steel strand. The spreader beam slide box is installed on the top of the spreader beam. The base of the center-of-gravity adjusting jack is connected to the spreader beam, and the extended end of its piston rod is connected to the spreader beam slide box so that the center-of-gravity adjusting jack can push the spreader beam slide box to move along the length direction of the spreader beam. A set of movable lifting lugs is provided at each end of the spreader beam along its length direction, and the position of the movable lifting lugs on the spreader beam is adjustable.

[0019] Further steps: Before the cable-mounted crane is put into operation, a trial lifting test is also included after the installation is completed.

[0020] Compared with existing technologies, the solution in this application has the following advantages:

[0021] The cable-mounted crane installation method disclosed in this application reduces the load on the hoisting equipment by splitting the main beam truss into intermediate truss beams and box-type load-bearing beams for phased hoisting, making installation more convenient, effectively reducing the installation time of the cable-mounted crane, and improving the installation efficiency of the cable-mounted crane.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 This is a process flow diagram of one embodiment of the installation method of the cable-mounted crane of this application;

[0025] Figure 2 This is a schematic diagram of the structure of a cable-mounted crane, which is an embodiment of the installation method of the cable-mounted crane of this application.

[0026] Figure 3 This is a schematic diagram of the lifting device in one embodiment of the installation method of the cable-mounted crane. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] Those skilled in the art will understand that, unless specifically stated otherwise, the terms "described" and "the" as used herein may also include plural forms. It should be further understood that the term "comprising" as used in the specification of this application means the presence of the described features, parts, and / or components, but does not exclude implementation as other features, parts, components, and / or combinations thereof supported by the art. The term "and / or" as used herein refers to at least one of the items defined by the term; for example, "A and / or B" can be implemented as "A," or as "B," or as "A and B."

[0029] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate directions or positional relationships based on the exemplary directions or positional relationships shown in the accompanying drawings. They are used to facilitate the description or simplification of the embodiments of this application and are not intended to indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0033] Cable-stayed cranes, as large construction equipment for suspension bridges, rely on the main cables of the suspension bridge for support, enabling them to move and fix objects on the main cables. Please see [link to relevant documentation]. Figures 1 to 3 The cable-mounted crane of this application includes a traveling mechanism 1, a main beam truss 2 and a lifting system 3. The traveling mechanism 1 is installed on the main cable of the suspension bridge, the main beam truss 2 is installed on the traveling mechanism 1 to move and travel on the main cable with the traveling mechanism 1, and the lifting device is installed on the main beam truss 2 to complete the lifting of bridge components.

[0034] Specifically, two sets of traveling mechanisms 1 are provided and located at both ends of the main beam truss 2, and the two sets of traveling mechanisms 1 are respectively installed on the two main cables. In this embodiment, the traveling mechanism 1 includes a main body, rollers, traction jacks 12, load conversion jacks, and replaceable support clamp devices 13. The rollers and replaceable support clamp devices 13 are both located at the bottom of the main body of the traveling mechanism 1. The load conversion jacks are located on the main body of the traveling mechanism 1 and connected to the rollers located at the bottom of the main body. The load conversion jacks are used to control the vertical movement of the traveling wheels to bring them into contact with or away from the main cable. Multiple sets of rollers are provided along the length of the main body of the traveling mechanism 1, and multiple sets of load conversion jacks are also provided corresponding to each set of rollers. Multiple replaceable support clamp devices 13 are provided along the length of the main body of the traveling mechanism 1. The main body of the traveling mechanism 1 is connected to the main cable via multiple replaceable support clamp devices 13. When the traveling mechanism 1 moves axially along the main cable, multiple replaceable support clamps 13 need to be loosened from the main cable, creating a gap between the replaceable support clamps 13 and the main cable. A load-conversion jack drives the rollers downwards to contact the main cable, allowing the traction jack 12 to pull the traveling mechanism 1 axially along the main cable. Both ends of the traveling mechanism 1 can be connected to the traction jack 12, enabling the traction jack 12 to pull the traveling mechanism 1 in opposite directions along the main cable.

[0035] The main girder truss 2 is erected between two sets of traveling mechanisms 1. In this embodiment, the main girder truss 2 consists of a middle truss beam 21 welded from H-beams and two box-type load-bearing beams 22. The middle truss beam 21 mainly provides rigid support for the overall structure of the cable-mounted crane. The box-type load-bearing beams 22 at both ends of the middle truss beam 21 are connected to the two sets of traveling mechanisms 1, thereby connecting the main girder truss 2 with the traveling mechanisms 1. The internal space of the middle truss beam 21 in this embodiment is used to house the lifting system 3 and to provide a working platform for construction operations. Considering the convenience of transportation, installation, disassembly, and connection, the middle truss beam 21 can be divided into multiple box girder segments. Adjacent box girder segments are connected by high-strength bolts, allowing multiple box girder segments to be transported to the site and then spliced, achieving a modular design. The box-type load-bearing beams 22 located at both ends of the middle truss beam 21, as the main load-bearing components of the main girder truss 2, can also be connected by high-strength bolts, transported to the site, and then spliced, achieving a modular design.

[0036] In addition, the number of box girder segments of the intermediate truss beam 21 can be increased or decreased according to the spacing between the two main cables, and the other structures of the main girder truss 2 do not need to be modified, making it highly adaptable.

[0037] The lifting system 3 is installed on the main beam truss 2. In this embodiment, the lifting system 3 includes a cable reeling device and a lifting jack. The steel strand of the cable reeling device passes through the lifting jack and is connected to a lifting device 6. The lifting device 6 is used to connect to the bridge structure to be lifted, so that the bridge structure can be lifted in cooperation with the cable reeling device and the lifting jack. The main beam truss 2 is also equipped with a hydraulic pump station 4 and a control room 5. The hydraulic pump station 4 is used to supply oil to the traveling mechanism 1, the cable reeling device, and the lifting jack, and the control room 5 is used to control the operation of the entire cable-mounted crane.

[0038] The lifting device 6 in this embodiment includes a spreader beam 61, a spreader beam slide box 62, a lifting anchor seat 63, a movable lifting lug 64, and a center-of-gravity adjusting jack 65. The steel strand of the wire take-up and release device is connected to the lifting anchor seat 63, which is set on the spreader beam slide box 62. The spreader beam slide box 62 is installed on top of the spreader beam 61. The base of the center-of-gravity adjusting jack 65 is connected to the spreader beam 61, and the extended end of its piston rod is connected to the spreader beam slide box 62. The center-of-gravity adjusting jack 65 pushes the spreader beam slide box 62 to move along the length of the spreader beam 61, thereby adjusting the lifting center of gravity. A positioning screw is also provided between the spreader beam slide box 62 and the spreader beam 61. After the center-of-gravity adjusting jack 65 adjusts the lifting center of gravity, the positioning screw locks the relative position of the spreader beam slide box 62 and the spreader beam 61 to prevent the spreader beam slide box 62 from slipping and improve the stability of the lifting. A set of movable lifting lugs 64 is provided at each end of the spreader beam 61 along its length. The position of the movable lifting lugs 64 on the spreader beam 61 is adjustable to accommodate the different temporary lifting point distances of different beam segments. In other words, the lifting device 6 in this embodiment can not only meet the lifting requirements of standard segment beams, but also meet the lifting requirements of segment beams of other specifications.

[0039] The cable-mounted crane described in this application serves as the main lifting equipment for constructing a suspension bridge. It uses the two main cables of the suspension bridge as load-bearing supports and moves along the main cables. It can cross obstacles such as cable clamps of the main cables of the suspension bridge and lift large bridge structures from the transport vessels below to designated positions in the construction work area for the assembly of the bridge's own large structures.

[0040] Based on the structure of the cable-mounted crane described above, please refer to... Figure 1 This application provides a method for installing a cable-mounted crane, specifically including the following steps:

[0041] First, the various components of the cable-mounted crane are prepared. In this embodiment, the cable-mounted crane is manufactured and tested in the factory, then disassembled and transported by truck to the construction site. On the riverbank near the bridge tower, tower cranes and truck cranes are used to assemble the disassembled components into standard sections. The components are then transferred to barges. Tugboats are used to transport the cable-mounted crane components to the vicinity of the main tower for convenient hoisting operations.

[0042] Simultaneously, the main tower gantry is cantilevered along the bridge direction, and a hoisting device is installed on the main tower gantry. This application uses the main tower gantry as the construction platform for the cable-mounted crane. The main tower gantry includes a main tower truss and a cantilever truss. The main tower truss is fixed to the top of the main tower, and the cantilever truss is fixed to the top of the main tower truss, extending along the bridge direction, so that the main tower gantry extends beyond the main tower along the bridge direction. The hoisting device is installed on the cantilever truss to hoist each component of the cable-mounted crane to the main cable installation position for installation. Furthermore, this embodiment has two sets of main tower gantry at the top of the main tower, each set equipped with a hoisting device, allowing the two sets of hoisting devices to perform hoisting operations on the two sets of traveling mechanisms 1 respectively, thereby improving the installation efficiency of the cable-mounted crane.

[0043] The traveling mechanism 1 of the cable-borne crane is hoisted onto the main cable using a winch lifting device. Specifically, the winch lifting device is connected to the main body of the traveling mechanism 1. The winch lifting device is used to lift the main body of the traveling mechanism 1 above the main cable. At the same time, the position of the main body of the traveling mechanism 1 is adjusted to transfer the main body of the traveling mechanism 1 onto the main cable. The main cable is then secured by the replaceable support clamp device 13 at the bottom of the main body of the traveling mechanism 1.

[0044] Meanwhile, the anchoring point 14 of the traction jack 12 is set at a distance of 100 meters or 150 meters from the main body of the cable-mounted crane, preferably close to the cable clamp. This allows the cable clamp and the replaceable support clamp device 13 to hold the main cable tightly to resist the tension of the traction jack 12, ensuring the stability of the cable-mounted crane in a fixed state. The steel strand between the traction jack 12 and its anchoring point 14 also needs to be properly threaded, so that the traction jack 12 can pull the traveling mechanism 1 to move along the axial direction of the main cable.

[0045] Subsequently, the main beam truss 2 of the cable-mounted crane is hoisted onto the traveling mechanism 1 installed on the main cable and connected and fixed to the traveling mechanism 1 using a winch lifting device. This process is divided into two parts. First, the two box-shaped load-bearing beams 22 at the ends of the main beam truss 2 are hoisted onto the two traveling mechanisms 1 respectively and fixed by connecting them with pins. After adjusting the position and height, they are fixed to the main tower gantry with steel wire ropes. Next, the spliced ​​intermediate truss beam 21 is hoisted between the two box-shaped load-bearing beams 22. After the whole assembly is in place, it is connected to the box-shaped load-bearing beams 22 at both ends with high-strength bolts, thus completing the connection and fixation of the main beam truss 2 to the traveling mechanism 1.

[0046] In this embodiment, the intermediate truss beam 21 can be hoisted by the winch lifting equipment on the main tower gantry after being spliced ​​on the ground, reducing high-altitude operations, facilitating workers to splice the intermediate truss beam 21, ensuring the structural strength of the main beam truss 2 after connection, and reducing safety hazards.

[0047] Next, using a winch hoist, the cable-mounted crane's lifting system 3, hydraulic pump station 4, and control room 5 are sequentially hoisted into the main beam truss 2. The steel strands of the lifting system 3 are then connected to the lifting device 6 to complete the installation of the cable-mounted crane. Before hoisting the lifting system 3, hydraulic pump station 4, and control room 5, some of the upper crossbars of the main beam truss 2 are removed to facilitate the hoisting equipment in hoisting the lifting system 3, hydraulic pump station 4, and control room 5 into the main beam truss 2. Then, the oil pipes and conduits between the lifting system 3, hydraulic pump station 4, control room 5, and traveling mechanism 1 are connected as required, and the hydraulic system is initially tested.

[0048] In addition, auxiliary devices such as guardrails can be installed on the main beam truss 2 to ensure the safety of workers during construction.

[0049] After the lifting system 3, hydraulic pump station 4, and control room 5 are hoisted into the main beam truss 2, the lifting device 6 is connected to the lifting system 3 via steel strands. Specifically, the lifting device 6 is hoisted to the position of the lower crossbeam using a winch lifting equipment. As needed, the steel strands of the take-up and release device are passed through the lifting jacks, and the anchor head of the steel strand is lowered to the lower crossbeam to connect the anchor head of the steel strand with the lifting device 6. Then, the lifting device 6 is lifted to the vicinity of the top of the tower using the lifting jacks.

[0050] Before connecting the steel strand of the cable-mounted crane to the lifting device 6, the cable-mounted crane can be debugged according to the instruction manual. The steel strand is wound into the cable winding and unwinding device, and the anchoring point 14 of the traction jack 12 is installed to move the cable-mounted crane along the main cable. The safety wire rope on the main tower gantry used to connect with the cable-mounted crane is slowly loosened until it is completely released, so that the load is completely transferred to the cable-mounted crane, enabling the cable-mounted crane to move on its own. Then, the steel strand of the cable-mounted crane is connected to the lifting device 6 to complete the overall installation of the cable-mounted crane of this application.

[0051] Before lifting operations, a trial lift must be conducted on the cable-mounted crane after installation to verify its structural reliability and safety, ensuring the safety of bridge structure lifting operations. The trial lift also allows for the actual testing of the crane's travel speed and lifting speed after loading, providing a basis for calculating the bridge structure lifting time. Furthermore, it enables the identification and timely correction of any deficiencies during the lifting process.

[0052] The trial lifting test includes walking tests, no-load tests, and load tests (including dynamic and static load tests) to verify the operation of the hydraulic system, the load-bearing capacity of the main beam truss 2, the synchronization of the lifting equipment 6, and the operation of the control system. The trial lifting position is based on the most unfavorable working condition. The cable-mounted crane uses a standard beam segment as the loading object, and adds a counterweight to this segment to 1.25 times the standard segment weight.

[0053] During the no-load test, after the cable-mounted crane travels to the designated position, the travel clamps are tightened as required to secure the crane firmly. The lifting system 3 of the cable-mounted crane is activated, and the lifting device 6 is lowered evenly to its longest position. The various limit switches, hydraulic control systems, and the arrangement of the steel strands are observed and recorded. The lifting jacks are then used to evenly raise the lifting device 6, and the height limit switches and the arrangement of the steel strands are observed and recorded. This allows for monitoring the lifting and lowering speed of the lifting device 6, verifying the responsiveness of the lifting system 3's lifting limits, and checking the operation of each component of the cable-mounted crane under no-load conditions.

[0054] After the no-load test of the cable-mounted crane is completed, the static load test and dynamic load test can be carried out. First, the original data of the tower deflection and the mid-span measuring point of the cable-mounted crane are measured and recorded. The test segment is transported to the bottom of the cable-mounted crane, the barge is fixed in place for lifting, and the positioning accuracy of the barge is controlled within 1m. The cable-mounted crane is started, and the lifting devices 6 on both sides are lowered synchronously to the test segment. The lifting devices 6 are firmly connected to the lifting points of the test segment. The connection of each component is checked. After passing the inspection, the report is submitted to the command center. The trial lifting of the cable-mounted crane is divided into 9 levels of loading according to 20%, 40%, 60%, 70%, 80%, 90%, 100%, 110%, and 125% of the design rated lifting weight, with the load slightly off the ground (or the ship's deck) as the reference. Loading is to gradually transfer the weight of the test segment to the lifting jacks. During the initial loading, the force on each lifting jack is adjusted to keep it basically the same. When 40% of the rated load is transferred to the lifting jacks, the connection between the lifting jacks, lifting device 6, and the test segment is checked again. When the load reaches 90%, the test segment is lifted off the barge in one empty stroke to reduce swaying after leaving the barge. The operator observes the stress at each point and adjusts the stress at each point according to the theoretical stress at the lifting points of the beam segment to ensure that the test segment is lifted horizontally during the hoisting process. Based on the force measuring device of the lifting system 3, the load borne by the cable crane lifting point is calculated. Each time the single-point load increases by one level, the components of the cable crane are checked and recorded. When the test segment (or counterweight) is fully supported by the cable crane, it is checked again and recorded. The height of the test segment (or counterweight) off the barge support is controlled at 20cm. After stabilizing the load for 10 minutes, the displacement of the measuring point in the middle of the test segment and the pylon deflection value are measured. At the same time, the operation of the relevant components of the cable crane is observed and recorded. After raising the cable-mounted crane's lifting device by 650cm and stabilizing it for 10 minutes, the displacement of the measuring point at the middle of the test segment was measured, and the operation of the relevant components of the cable-mounted crane was observed and recorded. After lowering the cable-mounted crane's lifting device by 650cm and stabilizing it for 10 minutes, the displacement of the measuring point at the middle of the test segment and the tower deflection were measured, and the operation of the relevant components of the cable-mounted crane was observed and recorded. After confirming that everything was normal, the test segment (or counterweight) was lowered, and the cable-mounted crane load test was completed. By comparing the above relevant measurement data, the operation of each component of the cable-mounted crane after loading, the synchronization of the lifting and lowering of the lifting device 6, the tower deflection, and the deformation of the main beam truss 2 at the mid-span of the cable-mounted crane can be determined.

[0055] Once the above tests are passed, the cable-mounted crane can be put into construction use.

[0056] After the cable-mounted crane has been used, it can be dismantled in reverse order of the above installation sequence. That is, the hoisting system 3, hydraulic pump station 4, control room 5 and other structures in the main beam truss 2 are lifted away by the hoisting equipment on the main tower gantry. Then, the hoisting equipment is connected to the main beam truss 2 to release the connection between the main beam truss 2 and the traveling mechanism 1. Finally, the hoisting equipment is connected to the main body of the traveling mechanism 1 to release the lock between the replaceable support clamp device 13 at the bottom of the traveling mechanism 1 and the main cable. Then, the traveling mechanism 1 is lifted away from the main cable to complete the dismantling of the cable-mounted crane.

[0057] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for installing a cable-mounted crane, characterized in that, Includes the following steps: Prepare the traveling mechanism, main beam truss, and lifting system of the cable-mounted crane. After manufacturing the entire cable-mounted crane in the factory and conducting tests, disassemble the cable-mounted crane into individual components and transport them to the construction site. Use tower cranes and truck cranes to assemble the individual components of the cable-mounted crane into standard sections. Then transfer the various components of the cable-mounted crane to barges and transport them to the vicinity of the main tower for lifting operations. The traveling mechanism is connected to the main cable, the main beam truss is installed on the traveling mechanism, and the lifting system is installed on the main beam truss. The main tower gantry is cantilevered along the bridge direction, and the main tower gantry extends outward along the bridge direction, and a hoisting device is installed on the main tower gantry; The traveling mechanism of the cable-borne crane is hoisted onto the main cable using the hoisting equipment for installation. The main beam truss of the cable-mounted crane is hoisted onto the traveling mechanism installed on the main cable using the hoisting equipment and then connected and fixed to the traveling mechanism. The main beam truss of the cable-mounted crane includes a middle truss beam and two box-type load-bearing beams. When hoisting the main beam truss of the cable-mounted crane to the traveling mechanism using the hoisting equipment, the two box-type load-bearing beams at the ends of the main beam truss are first hoisted onto the two traveling mechanisms respectively and fixed by connecting them with pins. Then, the middle truss beam is hoisted between the two box-type load-bearing beams and connected to the two box-type load-bearing beams with high-strength bolts to complete the connection and fixation between the main beam truss and the traveling mechanism. The middle truss beam includes multiple box-beam segments bolted together with high-strength bolts. When hoisting the middle truss beam, the multiple box-beam segments are first assembled on the ground to form an integral middle truss beam, and then the hoisting equipment is used for the overall hoisting. The hoisting system, hydraulic pump station, and control room of the cable-mounted crane are sequentially lifted into the main beam truss using a winch lifting device, and the steel strands of the hoisting system are connected to the lifting equipment to complete the installation of the cable-mounted crane.

2. The installation method of the cable-mounted crane according to claim 1, characterized in that, The main tower gantry is provided with two sets at the top of the main tower. Each set of the main tower gantry is equipped with a hoisting device. The hoisting devices on the two sets of main tower gantry correspond to the hoisting of the traveling mechanism of the cable-borne crane on the two main cables.

3. The installation method of the cable-mounted crane according to claim 1, characterized in that, When using the hoisting equipment to lift the traveling mechanism of the cable-borne crane to the main cable, the traveling mechanism is raised above the main cable, and the position of the traveling mechanism is adjusted to transfer it to the main cable. The traveling mechanism is then secured to the main cable by its replaceable support clamp device to complete the connection between the traveling mechanism and the main cable.

4. The installation method of the cable-mounted crane according to claim 3, characterized in that, After the main cable is secured by the replaceable support clamp device of the traveling mechanism, the anchor point of the traction jack is installed at a preset position away from the traveling mechanism, and a steel strand is threaded between the traction jack and the anchor point so that the traveling mechanism can be moved axially along the main cable by the traction jack.

5. The installation method of the cable-mounted crane according to claim 1, characterized in that, When connecting the steel strand of the lifting system to the lifting device, use a winch to lift the lifting device to the position of the lower crossbeam of the main tower. Pass the steel strand of the lifting system's take-up and release device through the lifting jack and lower the anchor head of the steel strand to the lower crossbeam to connect the anchor head of the steel strand to the lifting device. Then, use the lifting jack to lift the lifting device to the vicinity of the top of the tower.

6. The installation method of the cable-mounted crane according to claim 5, characterized in that, The lifting device includes a spreader beam, a spreader beam slide box, a lifting anchor seat, movable lifting lugs, and a center-of-gravity adjusting jack. The lifting anchor seat is installed on the spreader beam slide box and is connected to the anchor head of the steel strand. The spreader beam slide box is installed on the top of the spreader beam. The base of the center-of-gravity adjusting jack is connected to the spreader beam, and the extended end of its piston rod is connected to the spreader beam slide box so that the center-of-gravity adjusting jack can push the spreader beam slide box to move along the length of the spreader beam. A set of movable lifting lugs is provided at each end of the spreader beam along its length, and the position of the movable lifting lugs on the spreader beam is adjustable.

7. The installation method of the cable-mounted crane according to claim 1, characterized in that, Before lifting operations can be carried out, the installed cable-mounted crane also includes a trial lifting test procedure.

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