Cable crane overall installation and dismounting device and installation and dismounting method

Abstract

This invention relates to the field of suspension bridge construction technology, specifically to a device and method for the overall installation and dismantling of a cable-mounted crane. It includes an upper slewing truss, a lower support truss, a slewing mechanism, and a lifting mechanism. The upper slewing truss is connected to the lower middle section of the cable-mounted crane; the lower support truss is located below the upper slewing truss; the slewing mechanism is located between the upper slewing truss and the lower support truss, and is used to drive the upper slewing truss to rotate around a vertical axis; the lifting mechanism is a vertical lifting structure with the upper end connected to the main cable and the lower end connected to the lower support truss, used to vertically lift the lower support truss and the cable-mounted crane using the main cable. This application allows for the overall installation of the cable-mounted crane, reducing the risks and installation time associated with manual, piece-by-piece installation at heights, avoiding construction in harsh aerial environments, effectively controlling the assembly quality of the cable-mounted crane, and saving time spent on unloaded travel by installing the cable-mounted crane directly at the mid-span position.

Description

Technical Field

[0001] This invention relates to the field of suspension bridge construction technology, specifically to a cable-mounted crane overall installation and dismantling device and method. Background Technology

[0002] Cable-stayed cranes are the main mechanical equipment used in the installation of stiffening girders for suspension bridges. The construction process involves first installing and debugging the cable-stayed crane on the main cable, then transporting the stiffening girder to the crane using a barge or girder transport vehicle. The cable-stayed crane then vertically lifts the stiffening girder for installation. After installation, the cable-stayed crane travels along the main cable to the next work position. According to the construction plan, the installation of stiffening girders usually starts from the mid-span of the main bridge and then proceeds symmetrically to both sides, lifting one girder at a time. This is illustrated in patents CN105839537B ("Construction Method for Lifting and Installing Stiffening Girder of Suspension Bridge with Cable-Stayed Crane") and CN101787677A ("Method for Erecting Main Girder of Suspension Bridge Using a Double-Machine Double-Lift Hydraulic CNC Cable-Stayed Crane"). However, the aforementioned patent does not explain how the cable-mounted crane is installed. Currently, there are generally two methods for installing the cable-mounted crane on the main cable. One method is to disassemble the cable-mounted crane into sections and transport them to the area below the main tower of the suspension bridge. Then, the crane is lifted piece by piece onto the main cable using the gantry structure and lifting mechanism on the main tower for final assembly. After final assembly, the crane moves from the main tower to the mid-span position to begin lifting beams. The other method is to divide the cable-mounted crane symmetrically into three sections, transport them by barge to the area below the mid-span of the main bridge, and use specialized equipment to directly lift them onto the main cable in the mid-span. Then, the three sections are assembled together.

[0003] The following issues arise regarding the installation and dismantling of existing cable-stayed cranes:

[0004] 1. Although the method of installing and dismantling the cable-mounted crane at the main tower utilizes existing hoisting equipment, the segmented installation and dismantling increases the construction period and labor costs. In addition, since the operation starts at the mid-span position, it takes a long time for the cable-mounted crane to travel from the main tower to the mid-span position, which also occupies the construction period.

[0005] 2. Using barges to transport materials directly to the mid-span for installation greatly reduces construction time, but it still requires aerial assembly with cranes.

[0006] 3. Existing crane installation methods all require manual work at height, increasing labor costs and the risks associated with working at height;

[0007] 4. Assembling mechanical equipment at heights not only increases the difficulty of equipment installation, but also makes it difficult to guarantee the quality of installation.

[0008] In summary, the installation and dismantling of cable-mounted cranes currently faces numerous problems and limitations, necessitating the development of new equipment to address these issues. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a cable-mounted crane overall installation and dismantling device and method.

[0010] The technical solution of this invention is: a cable-mounted crane overall installation and dismantling device, comprising,

[0011] The upper slewing truss is connected to the lower middle part of the cable-mounted crane;

[0012] A lower support truss, which is located below the upper slewing truss;

[0013] A slewing mechanism is provided between the upper slewing truss and the lower support truss, and is used to drive the upper slewing truss to rotate about the vertical axis;

[0014] The lifting mechanism is a vertical lifting structure that connects the main cable at the upper end and the lower support truss at the lower end. It is used to vertically lift the lower support truss and the cable-mounted crane by relying on the main cable.

[0015] According to the cable-mounted crane assembly and disassembly device provided in this application, the lifting mechanism includes four sets of vertical tensioning structures; the four sets of vertical tensioning structures are respectively placed at the four corners of the lower support truss; the vertical tensioning structures include,

[0016] Upper anchor head, which is used to fix and connect with the cable clamp on the main cable;

[0017] A continuous lifting jack is located on the lower end face of the lower support truss and is fixedly connected to the lower support truss in the vertical direction.

[0018] The upper end of the lifting steel strand is connected to the upper anchor head, and the lower end passes through the lower support truss and is connected to the continuous lifting jack. The lower support truss is then vertically lifted by tensioning with the continuous lifting jack.

[0019] According to the cable-mounted crane assembly and disassembly device provided in this application, the slewing mechanism includes...

[0020] A slewing bearing, wherein the inner ring of the slewing bearing is fixedly connected to the lower support truss and the outer ring is fixedly connected to the upper slewing truss, and the outer ring of the slewing bearing is provided with an external toothed ring;

[0021] A rotary motor is fixed on the lower support truss. The output end of the rotary motor is meshed with an external gear ring for driving the outer ring of the rotary support bearing to rotate around the vertical axis.

[0022] According to the cable-mounted crane assembly and disassembly device provided in this application, the upper slewing truss includes,

[0023] Upper grid beam;

[0024] The upper crossbeam is fixed to both ends of the upper grid beam.

[0025] The bearing mounting base is a ring-shaped structure fixed in the middle of the upper grid beam.

[0026] According to the cable-mounted crane assembly and disassembly device provided in this application, the lower support truss includes...

[0027] The lower grid beam has bolt holes for connecting with the outer ring of the slewing support bearing, and ear plates for mounting the slewing motor are provided on the lower grid beam.

[0028] The lower longitudinal beam is installed on both longitudinal sides of the lower grid beam;

[0029] The lower crossbeam is installed between two sets of lower longitudinal beams and is located on both sides of the lower longitudinal beams in the transverse direction.

[0030] The lower crossbeam and the transverse portion of the lower grid beam are equipped with lifting lugs for connecting to the lifting gear on the cable-mounted crane.

[0031] The cable-mounted crane assembly and disassembly device provided in this application further includes,

[0032] The pulley is a fixed pulley mounted on the main cable;

[0033] The traction cable has one end connected to the winch at the top of the tower and the other end passing through a pulley and connected to the upper anchor head.

[0034] This application also provides a method for the overall installation and dismantling of a cable-mounted crane, the method using the aforementioned overall installation and dismantling device for a cable-mounted crane, comprising the following steps:

[0035] S1. Transport the cable-mounted crane and installation / removal device together by barge to the position below the mid-span of the main cable, and install the upper anchor head in the lifting mechanism onto the main cable;

[0036] S2. Use the lifting mechanism to lift the cable-mounted crane above the main cable;

[0037] S3. The slewing mechanism rotates the cable-mounted crane so that the traveling mechanism of the cable-mounted crane rests on the main cable, thus fixing the cable-mounted crane on the main cable.

[0038] S4. Remove the installation and dismantling device and lower it onto the barge to complete the installation process of the cable-mounted crane;

[0039] S5. Reverse S1 to S4 to complete the dismantling of the cable-mounted crane.

[0040] According to the cable-mounted crane installation and dismantling method provided in this application, the method of installing the upper anchor head in the lifting mechanism onto the main cable in step S1 includes: installing a pulley on the main cable at the position corresponding to the lifting mechanism, arranging a traction cable on the pulley, connecting the two ends of the traction cable to the winch on the top of the tower and the upper anchor head respectively, vertically lifting the upper anchor head based on the winch until the upper anchor head moves to the corresponding cable clamp installed on the main cable, and fixing the upper anchor head to the cable clamp.

[0041] According to the method for overall installation and dismantling of a cable-mounted crane provided in this application, in step S3, the method of rotating the cable-mounted crane by the slewing mechanism to make the traveling mechanism of the cable-mounted crane fall on the main cable includes: before the lifting mechanism lifts the cable-mounted crane, the slewing mechanism drives the upper slewing truss to make the length direction of the cable-mounted crane coincide with the direction along the bridge; after the cable-mounted crane is lifted above the main cable, the slewing mechanism drives the upper slewing truss to rotate around the vertical axis, so that the traveling mechanisms on both sides of the length direction of the cable-mounted crane are suspended on the two main cables; the lifting mechanism cooperates to lower the cable-mounted crane until the traveling mechanism falls on the main cable.

[0042] According to the cable-mounted crane assembly and dismantling method provided in this application, step S4, the method for dismantling the assembly and dismantling device includes: starting the lifting device on the cable-mounted crane, fixing the lifting device to the lower support truss through steel strands, dismantling the connection between the upper slewing truss and the cable-mounted crane, removing the upper anchor head from the cable clamp of the main cable and fixing the upper anchor head to the lower support truss, slowly lowering the lifting device and the assembly and dismantling device using the cable-mounted crane until the assembly and dismantling device is lowered to the barge below, terminating the connection between the lifting device and the assembly and dismantling device, and completing the dismantling process of the assembly and dismantling device.

[0043] The advantages of this application are: 1. The installation and dismantling device of this application can complete the installation and dismantling of the cable crane without large hoisting equipment. The entire installation and dismantling construction is very simple and easy to operate. The cable crane does not need to be disassembled into multiple sections. The cable crane is installed and dismantled as a whole. There is no need to carry out aerial assembly operations, which saves a lot of time, reduces the risk of high-altitude operations, and ensures the quality of installation and dismantling.

[0044] 2. The lifting mechanism of this application has a simple structure and is extremely convenient to operate and construct. By continuously lifting jacks, the installation and dismantling device and the cable-borne crane can be quickly lifted from the barge to the main cable for installation, or the dismantled cable-borne crane can be lowered from the main cable to the barge for dismantling. The whole operation is extremely simple.

[0045] 3. The combination of the slewing support bearing and the slewing motor in this application allows for convenient rotation adjustment of the cable-mounted crane, facilitating its movement from bottom to top onto the main cable and its removal from the main cable from top to bottom. The cable-mounted crane will not collide or interfere with the main cable, making operation simple and convenient.

[0046] 4. The upper slewing truss structure of this application is simple, has low manufacturing cost, is extremely convenient to dismantle and install, and has a scientifically sound stress distribution.

[0047] 5. The lower support truss structure of this application is simple, and multiple connection positions are reserved for installation and dismantling, making it convenient to operate and use;

[0048] 6. The pulley and traction cable structure of this application greatly facilitates the installation and removal of the upper anchor head. The upper anchor head can be easily installed on or removed from the main cable without the need for large hoisting equipment, making the entire installation and removal process extremely convenient.

[0049] 7. The installation and dismantling method of this application is simple and efficient, does not require the introduction of large hoisting equipment, reduces the time spent working in the air, greatly reduces the risk of operation, and has high installation and dismantling efficiency and greatly improves safety.

[0050] 8. This application makes the installation and removal of the upper anchor head extremely convenient. With the cooperation of winch, pulley and traction cable, the upper anchor head can be installed and removed quickly without the need for large hoisting equipment. The operation is extremely simple.

[0051] 9. The method of installing and dismantling the cable-mounted crane in this application is very simple. During the vertical movement of the cable-mounted crane, the cable-mounted crane is rotated so that its length direction coincides with the longitudinal direction of the bridge, which facilitates the vertical movement of the cable-mounted crane. When it is necessary to install or dismantle the cable-mounted crane, rotating the cable-mounted crane can easily install the cable-mounted crane onto the main cable or remove it from the main cable. The construction method is very simple, and there will be no interference or collision with the main cable during the construction process, thus improving safety.

[0052] 10. During the dismantling and installation of the device in this application, the lifting equipment on the cable-mounted crane is used. At this time, the cable-mounted crane is already installed on the main cable, which is the supporting foundation for the cable-mounted crane and the installation and installation device. Using the cable-mounted crane to dismantle and lower the installation and installation device is simple to operate and convenient to construct.

[0053] This application involves the overall installation of a cable-mounted crane, which reduces the risks and installation time associated with manual, piece-by-piece installation at heights. It also avoids construction in harsh aerial environments, effectively controls the assembly quality of the cable-mounted crane, and allows for direct installation of the crane at the mid-span position, saving time spent on unloaded travel and thus conserving construction time. Attached Figure Description

[0054] Figure 1 This application includes a schematic diagram of the cable-mounted crane and its installation / dismantling device (the cable-mounted crane is detached from the installation / dismantling device).

[0055] Figure 2 This application includes a schematic diagram showing the connection between the cable-mounted crane and the installation / removal device.

[0056] Figure 3 This application upgrades the structural diagram of the organization;

[0057] Figure 4 This application includes a schematic diagram of the slewing mechanism.

[0058] Figure 5 : Top view of the upper slewing truss of this application;

[0059] Figure 6 Side view of the upper slewing truss of this application;

[0060] Figure 7 : Top view of the lower support truss of this application;

[0061] Figure 8 Side view of the lower support truss of this application;

[0062] Figure 9 This application includes a schematic diagram of the anchor head installation.

[0063] Figure 10 This application includes a schematic diagram of the overall lifting cable-driven crane.

[0064] Figure 11 The application's lifting mechanism is shown in the front view above the main cable;

[0065] Figure 12 This application provides a schematic diagram illustrating the connection between the cable-mounted crane and the main cable in the lifting mechanism.

[0066] Figure 13 This application includes a schematic diagram showing the cable-mounted crane detaching from the upper slewing truss.

[0067] Figure 14 This application includes a schematic diagram of the overall lowering and dismantling device for the cable-mounted crane;

[0068] Figure 15 This application includes a schematic diagram illustrating the overall lowering and dismantling of the cable-mounted crane onto the barge.

[0069] Wherein: 1—Upper slewing truss; 11—Upper grid beam; 12—Upper crossbeam; 13—Bearing mounting seat;

[0070] 2—Lower supporting truss; 21—Lower grid beam; 22—Lower longitudinal beam; 23—Lower transverse beam; 24—Bolt hole; 25—Ear plate; 26—Lifting lug;

[0071] 3—Slewing mechanism; 31—Slewing support bearing; 32—Slewing motor;

[0072] 4—Lifting mechanism; 41—Upper anchor head; 42—Continuous lifting jack; 43—Lifting steel strand; 44—Pulley; 45—Traction cable;

[0073] 5—Cable-mounted crane; 6—Main cable; 7—Cable clamp; 8—Winder. Detailed Implementation

[0074] Embodiments of the present invention are described in detail below, 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0075] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 invention 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, they should not be construed as limitations on this invention.

[0076] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0078] This application relates to a cable-mounted crane overall installation and dismantling device and a method for installing and dismantling the cable-mounted crane. The installation and dismantling device enables the cable-mounted crane to be installed as a whole onto the main cable, and the installation of the cable-mounted crane is carried out from the mid-span position. This installation and dismantling method can reduce the time spent working in the air and the travel time of the cable-mounted crane on the main cable, which can significantly save the construction period and ensure the safety of the entire construction.

[0079] Specifically, such as Figures 1-15 As shown, the installation and dismantling device of this application includes an upper slewing truss 1, a lower support truss 2, a slewing mechanism 3, and a lifting mechanism 4. The upper slewing truss 1 is connected to the lower middle part of the cable-mounted crane 5, and the lower support truss 2 is located below the upper slewing truss 1. The slewing mechanism 3 is disposed between the upper slewing truss 1 and the lower support truss 2, and is used to drive the upper slewing truss 1 to rotate around the vertical axis. The lifting mechanism 4 is a vertical lifting structure with the upper end connected to the main cable 6 and the lower end connected to the lower support truss 2, and is used to vertically lift the lower support truss 2 and the cable-mounted crane 5 based on the main cable 6.

[0080] That is, the upper slewing truss 1 is a connecting structure fixed to the cable-mounted crane 5, and the lower support truss 2 is a support structure for installing the slewing mechanism 3 and the lifting mechanism 4. The purpose of the slewing mechanism 3 is to drive the upper slewing truss 1 to rotate around the vertical axis, so as to adjust the deviation of the cable-mounted crane 5 in the length direction. The cable-mounted crane 5 is erected on two main cables 6 in the transverse direction of the bridge. That is to say, the length direction of the cable-mounted crane 5 should be longer than the transverse distance between the two main cables 6. However, the width direction of the cable-mounted crane 5 in this application is shorter than the transverse distance between the two main cables 6. Therefore, when the cable-mounted crane 5 rotates to the point where its length direction coincides with the longitudinal direction of the bridge, it can pass between the two main cables 6. Then, by rotating and adjusting through the slewing mechanism 3, the length direction of the cable-mounted crane 5 can be made to coincide with the transverse direction of the bridge. The cable-mounted crane 5 can then be installed on or removed from the main cables 6. During the installation and removal process, the slewing mechanism 3 adjusts the cable-mounted crane 5 to avoid interference and collision between the cable-mounted crane 5 and the main cables 6.

[0081] In actual use, the installation and dismantling device is installed on the cable-mounted crane 5. Then, a barge is used to transport the cable-mounted crane 5 with the installation and dismantling device installed to the position directly below the mid-span of the main cable. The lifting mechanism 4 is installed on the main cable 6. The lifting mechanism 3 drives the installation and dismantling device and the cable-mounted crane 5 to move vertically as a whole. At this time, the length direction of the cable-mounted crane 5 coincides with the longitudinal direction of the bridge. After the cable-mounted crane 5 moves above the main cable 6, the slewing mechanism 3 drives the cable-mounted crane 5 to rotate around the vertical axis, so that the length direction of the cable-mounted crane 5 coincides with the transverse direction of the bridge. The cable-mounted crane 5 is adjusted so that the traveling mechanisms at both ends of the cable-mounted crane 5 are just above the main cable 6. Then, the whole thing is lowered and adjusted, and the traveling mechanisms are fixed on the main cable 6, completing the installation of the cable-mounted crane 5.

[0082] After installation, disconnect the main cable 6 from the lifting mechanism 4, then use the lifting device on the cable crane 5 to connect the lower support truss 2, and disconnect the upper slewing truss 1 from the cable crane 5. The cable crane 5 then uses the lifting device to lower the entire installation and dismantling device onto the barge below, completing the dismantling of the entire installation and dismantling device.

[0083] When it is necessary to dismantle the cable-mounted crane 5, the above procedures can be reversed to complete the dismantling of the cable-mounted crane 5.

[0084] In some embodiments of this application, the lifting mechanism 4 described above has been optimized, such as... Figure 3 As shown, the lifting mechanism 4 includes four sets of vertical tensioning structures, which are positioned at the four corners of the lower support truss 2. These four sets of vertical tensioning structures are connected to the two main cables 6 in pairs. Each vertical tensioning structure includes an upper anchor head 41, a continuous lifting jack 42, and a lifting steel strand 43. The upper anchor head 41 is used for fixed connection to the cable clamps 7 on the main cables 6. The continuous lifting jack 42 is located on the lower end face of the lower support truss 2 and is fixedly connected to the lower support truss 2 in the vertical direction. The upper end of the lifting steel strand 43 is connected to the upper anchor head 41, and the lower end passes through the lower support truss 2 and connects to the continuous lifting jack 42. The lower support truss 2 is vertically lifted by tensioning through the continuous lifting jack 42.

[0085] After the upper anchor head 41 is connected to the main cable 6, the continuous lifting jack 42 can provide a vertical reverse force to the lower support truss 2 by tensioning the lifting steel strand 43. For example, during the installation of the cable-mounted crane 5, this method can be used to provide a vertical upward lifting force to the cable-mounted crane 5 and the lower support truss 2. Since the continuous lifting jack 42 is installed on the lower end face of the lower support truss 2, strictly speaking, the lower support truss 2 can be moved to the connection point between the upper anchor head 41 and the main cable 6, making it easy to move the cable-mounted crane 5 above the main cable 6.

[0086] In other embodiments of this application, the rotary mechanism 3 described above has been optimized, specifically, as follows: Figure 4 As shown, the slewing mechanism 3 includes a slewing support bearing 31 and a slewing motor 32. The slewing support bearing 31 includes an inner ring and an outer ring, wherein the inner ring is fixedly connected to the lower support truss 2 and the outer ring is fixedly connected to the upper slewing truss 1. The outer ring of the slewing support bearing 31 is provided with an external gear ring. The slewing motor 32 is fixed on the lower support truss 2, and the output end of the slewing motor 32 is meshed with the external gear ring for transmission, used to drive the outer ring of the slewing support bearing 31 to rotate around the vertical axis.

[0087] The output end of the rotary motor 32 is equipped with a gear structure, which meshes with the external gear ring for transmission. The rotary motor 32 can drive the external gear ring to rotate around the vertical axis. The upper rotary truss 1 is fixedly connected to the inner ring. Therefore, the rotation of the upper rotary truss 1 and the cable-mounted crane 5 fixed on the upper rotary truss 1 around the vertical axis is actually a rotation around the axis of the external gear ring.

[0088] In this embodiment, two sets of rotary motors 32 are installed on the lower support truss 2. The two sets of rotary motors 32 are symmetrically arranged on both sides of the external gear ring with the axis of the external gear ring as the center line. The two sets of rotary motors 32 work together to drive the external gear ring to rotate.

[0089] In a preferred embodiment of this application, the upper slewing truss 1 described above has been optimized, specifically, as follows: Figures 5-6 The upper slewing truss 1 shown includes an upper grid beam 11, an upper crossbeam 12, and a bearing mounting seat 13. The upper crossbeam 12 is fixed to both ends of the upper grid beam 11, and the upper grid beam 11 and the upper crossbeam 12 form the upper support structure. The bearing mounting seat 13 is a ring-shaped structure fixed in the middle of the upper grid beam 11. The bearing mounting seat 13 is used to install the slewing support bearing 31, and the inner ring of the slewing support bearing 31 is fixedly connected to the bearing mounting seat 13.

[0090] In a further embodiment of this application, the lower support truss 2 described above has been optimized, specifically, as follows: Figures 7-8 As shown, the lower support truss 2 includes a lower grid beam 21, lower longitudinal beams 22, and lower transverse beams 23. The lower grid beam 21 has bolt holes 24 for connecting to the outer ring of the slewing support bearing 31. The lower grid beam 21 also has ear plates 25 for mounting the slewing motor 32. The outer ring of the slewing support bearing 31 is fixedly connected to the lower grid beam 21 through the bolt holes 24. Two ear plates 25 are mounted on the lower grid beam 21, one on each side. The lower longitudinal beams 22 are installed on both longitudinal sides of the lower grid beam 21, and the lower transverse beams 23 are installed between the two sets of lower longitudinal beams 22, located on both transverse sides of the lower longitudinal beams 22. The lower grid beam 21, lower transverse beams 22, and lower longitudinal beams 23 form the lower support structure.

[0091] Lifting lugs 26 are installed on the lower crossbeam 23 and the transverse portion of the lower grid beam 21 for connection with the lifting gear on the cable-mounted crane 5. The lifting gear on the cable-mounted crane 5 is connected to the lifting lugs 26, and the lowering operation of the installation and dismantling device is realized through the cable-mounted crane 5.

[0092] In some embodiments of this application, in order to facilitate the installation of the upper anchor head 41 in the above-mentioned lifting mechanism 4, the installation and removal device of this embodiment also includes a pulley 44 and a traction cable 45. The pulley 44 is a fixed pulley installed on the main cable 6. One end of the traction cable 45 is connected to the winch 8 at the top of the tower, and the other end passes through the pulley 44 and is connected to the upper anchor head 41.

[0093] like Figure 9As shown, when it is necessary to install the upper anchor head 41 in the lifting mechanism 4 onto the main cable 6, a pulley 44 is installed on the main cable 6 at the position corresponding to the lifting mechanism 4, and a traction cable 45 is arranged on the pulley 44. The two ends of the traction cable 45 are connected to the winch 8 on the top of the tower and the upper anchor head 41, respectively. The winch 8 is used to vertically lift the upper anchor head 41 until the upper anchor head 41 moves to the corresponding cable clamp 7 installed on the main cable 6, and the upper anchor head 41 is fixedly connected to the cable clamp 7.

[0094] The specific construction method for this application can be carried out according to the following steps:

[0095] S1. The cable-mounted crane 5 and the installation / dismantling device are transported as a whole to the position below the mid-span of the main cable 6 by barge, such as... Figure 9 As shown, a pulley 44 is installed on the main cable 6 at the position corresponding to the lifting mechanism 4. A traction cable 45 is arranged on the pulley 44. The two ends of the traction cable 45 are connected to the winch 8 on the top of the tower and the upper anchor head 41, respectively. The winch 8 is used to vertically lift the upper anchor head 41 until the upper anchor head 41 moves to the corresponding cable clamp 7 installed on the main cable 6. The upper anchor head 41 is then fixedly connected to the cable clamp 7.

[0096] In practical applications, a hand-operated hoist or other simple lifting equipment can also be used to install the upper anchor head 41;

[0097] S2. Use the lifting mechanism 4 to lift the cable crane 5 above the main cable 6;

[0098] After all four sets of upper anchor heads 41 are fixedly connected to the corresponding cable clamps 7, the continuous lifting jacks 42 in the lifting mechanism 4 tension the lifting steel strands 43, such as Figure 10 As shown, four sets of continuously lifting jacks 42 are synchronously driven, and the cable-mounted crane 5 and the installation / removal device are vertically lifted. At this time, the length direction of the cable-mounted crane 5 coincides with the direction along the bridge. The lifting mechanism 4 can lift the cable-mounted crane 5 until it passes over the main cable 6 and enters above the main cable 6, as shown. Figure 11 As shown;

[0099] S3. After the cable-mounted crane 5 is lifted above the main cable 6, the rotary motor 32 in the slewing mechanism 3 drives the external gear ring to rotate, causing the cable-mounted crane 5, fixed on the upper slewing truss 1, to rotate around the vertical axis. It can rotate 90° or other suitable angles, as long as the traveling mechanisms at both ends of the cable-mounted crane 5 are just above the corresponding main cable 6. The continuous lifting jacks 42 in the lifting mechanism 4 tension the lifting steel strand 43, causing the cable-mounted crane 5 and the installation / dismantling device to slowly descend until the traveling mechanisms on the cable-mounted crane 5 land on the corresponding main cable 6. Figure 12 As shown, the cable-mounted crane 5 is fixed to the main cable 6 by the clamps on the cable-mounted crane 5, thus completing the installation operation of the cable-mounted crane 5;

[0100] S4. Activate the hydraulic system on the cable-mounted crane 5, lower the lifting device of the cable-mounted crane 5, connect the lifting device to the lifting lugs 26 on the lower support truss 2 one by one, and dismantle the connection between the upper slewing truss 1 and the cable-mounted crane 5. Figure 13 As shown, the control lifting mechanism 4 slowly lowers the lower support truss 2, transferring the weight of the upper slewing truss 1 and the lower support truss 2 to the cable-mounted crane 5. The upper anchor head 41 is removed from the cable clamp 7 of the main cable 6 and fixed to the lower support truss 2. The cable-mounted crane 5 then slowly lowers the lifting device and installation / removal equipment, as shown... Figure 14 As shown, until the installation and dismantling device is lowered onto the barge below, as... Figure 15 As shown, disconnect the lifting device from the installation and dismantling device to complete the dismantling process of the installation and dismantling device;

[0101] S5. Reverse S1 to S4 to complete the dismantling process of the cable-mounted crane 5.

[0102] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for the overall installation and dismantling of a cable-driven crane, characterized in that: The installation and dismantling method uses a cable-mounted crane integrated installation and dismantling device; the installation and dismantling device includes... The upper slewing truss (1) is connected to the lower middle part of the cable-mounted crane (5); The lower support truss (2) is located below the upper slewing truss (1); Rotation mechanism (3), which is located between the upper rotation truss (1) and the lower support truss (2), is used to drive the upper rotation truss (1) to rotate around the vertical axis; The lifting mechanism (4) is a vertical lifting structure with the upper end connected to the main cable (6) and the lower end connected to the lower support truss (2). It is used to vertically lift the lower support truss (2) and the cable-mounted crane (5) based on the main cable (6). The lifting mechanism (4) includes four sets of vertical tensioning structures. The four sets of vertical tensioning structures are placed at the four corners of the lower support truss (2). The vertical tensioning structure includes an upper anchor head (41), which is used to fix and connect with the cable clamp (7) on the main cable (6). Pulley (44), said pulley (44) is a fixed pulley installed on the main cable (6); The traction cable (45) is connected at one end to the winch (8) at the top of the tower and at the other end to the upper anchor head (41) through the pulley (44). The installation and removal method includes the following steps: S1. Transport the cable-mounted crane (5) and the installation and dismantling device together by barge to the position below the mid-span of the main cable (6), and install the upper anchor head (41) in the lifting mechanism (4) onto the main cable (6); S2. Use the lifting mechanism (4) to lift the cable crane (5) above the main cable (6); S3, Rotation mechanism (3) rotates the cable crane (5) so that the traveling mechanism of the cable crane (5) falls on the main cable (6) and fixes the cable crane (5) on the main cable (6); S4. Remove the installation and dismantling device and lower it onto the barge to complete the installation process of the cable-mounted crane (5); S5. Reverse S1~S4 to complete the dismantling process of the cable crane (5); In step S1, the method of installing the upper anchor head (41) in the lifting mechanism (4) onto the main cable (6) includes: installing a pulley (44) on the main cable (6) at the position corresponding to the lifting mechanism (4), arranging a traction cable (45) on the pulley (44), connecting the two ends of the traction cable (45) to the winch (8) on the top of the tower and the upper anchor head (41) respectively, and vertically lifting the upper anchor head (41) based on the winch (8) until the upper anchor head (41) moves to the corresponding cable clamp (7) installed on the main cable (6), and fixing the upper anchor head (41) and the cable clamp (7) together. In step S4, the method for dismantling the installation and dismantling device includes: starting the lifting device on the cable crane (5), fixing the lifting device to the lower support truss (2) through steel strands, removing the connection between the upper slewing truss (1) and the cable crane (5), removing the upper anchor head (41) from the cable clamp (7) of the main cable (6) and fixing the upper anchor head (41) to the lower support truss (2), slowly lowering the lifting device and the installation and dismantling device using the cable crane (5) until the installation and dismantling device is lowered to the barge below, disconnecting the lifting device from the installation and dismantling device, and completing the dismantling process of the installation and dismantling device.

2. The method for overall installation and dismantling of a cable-driven crane as described in claim 1, characterized in that: The vertical tensioning structure also includes, A continuous lifting jack (42) is located on the lower end face of the lower support truss (2) and is fixedly connected to the lower support truss (2) in the vertical direction. The upper end of the lifting steel strand (43) is connected to the upper anchor head (41), and the lower end passes through the lower support truss (2) and is connected to the continuous lifting jack (42). The lower support truss (2) is vertically lifted by tensioning the continuous lifting jack (42).

3. The method for overall installation and dismantling of a cable-driven crane as described in claim 1, characterized in that: The rotary mechanism (3) includes, The inner ring of the slewing support bearing (31) is fixedly connected to the lower support truss (2), and the outer ring is fixedly connected to the upper slewing truss (1). The outer ring of the slewing support bearing (31) is provided with an external toothed ring. A rotary motor (32) is fixed on the lower support truss (2). The output end of the rotary motor (32) is meshed with the external gear ring for transmission, and is used to drive the outer ring of the rotary support bearing (31) to rotate around the vertical axis.

4. The method for overall installation and dismantling of a cable-driven crane as described in claim 3, characterized in that: The upper slewing truss (1) includes, Upper grid beam (11); The upper crossbeam (12) is fixed to both ends of the upper grid beam (11); The bearing mounting base (13) is a ring structure fixed in the middle of the upper grid beam (11).

5. The method for overall installation and dismantling of a cable-driven crane as described in claim 3, characterized in that: The lower support truss (2) includes, The lower grid beam (21) has bolt holes (24) for connecting with the outer ring of the slewing support bearing (31) and ear plates (25) for mounting the slewing motor (32) on the lower grid beam (21). The lower longitudinal beam (22) is installed on both sides of the lower grid beam (21) in the longitudinal direction; The lower crossbeam (23) is installed between two sets of lower longitudinal beams (22) and is located on both sides of the lower grid beam (21). The lower crossbeam (23) and the transverse portion of the lower grid beam (21) are equipped with lifting lugs (26) for connecting to the lifting gear on the cable crane (5).

6. The method for overall installation and dismantling of a cable-driven crane as described in claim 1, characterized in that: In step S3, the method of rotating the cable-mounted crane (5) by the slewing mechanism (3) to make the traveling mechanism of the cable-mounted crane (5) fall on the main cable (6) includes: before the lifting mechanism (4) lifts the cable-mounted crane (5), the slewing mechanism (3) drives the upper slewing truss (1) to make the length direction of the cable-mounted crane (5) coincide with the direction along the bridge. After the cable-mounted crane (5) is lifted above the main cable (6), the slewing mechanism (3) drives the upper slewing truss (1) to rotate around the vertical axis, so that the traveling mechanisms on both sides of the length direction of the cable-mounted crane (5) are suspended on the two main cables (6). The lifting mechanism (4) cooperates to lower the cable-mounted crane (5) until the traveling mechanism falls on the main cable (6).

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