Split type cable-mounted crane and construction method

Abstract

The present invention discloses a split-type cable-mounted crane and a construction method, including: a lifting bracket, which is arranged below the main cable and supports the beam section to be erected; a lifting device, which is arranged on the main cable, the top of any group of lifting devices is fixedly connected to the main cable on the same side, and the bottom is connected to the lifting bracket on the same side, and the lifting device is used to adjust the vertical distance between the lifting bracket and the main cable; a swinging device, which is arranged above the main cable, and any group of swinging devices includes two overhead cranes, which are arranged at intervals and move along the traction cable, and any overhead crane is detachably connected to the lifting device on the same side through a swinging rope. The present invention adopts a split structure, and arranges the lifting device on the main cable in the form of a module. The lifting bracket supports the beam section to be erected from the bottom, realizes the installation of the beam section located at the intersection of the cable and the beam, and cooperates with the swinging device to realize the rapid movement of the lifting device through the alternating swinging of the overhead crane, while ensuring the construction efficiency and meeting the construction requirements of the main beam of the suspension bridge under different conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and more specifically, to a split-type cable-mounted crane and a construction method. Background Art

[0002] In the construction of suspension bridges, an integrated cable-mounted crane or cable hanger is usually used to erect the main beam of the suspension bridge, with the main beam spanning the main bridge section and supported on both sides by the main cables. Traditional cable-mounted cranes are mostly integrated structures. When there is a span change between the main cables, the applicability of the integrated cable-mounted crane is relatively weak. The length and strength stiffness of the main beam of the cable-mounted crane need to be changed accordingly to successfully realize the full-length erection of the main beam of the suspension bridge, which seriously affects the construction progress; and due to the limitations of the construction structure, when the height of the main cable is lower than the height of the beam section to be erected, the integrated cable-mounted crane cannot erect the cable-beam intersection section.

[0003] In order to solve the above problems, it is necessary to provide a split cable-mounted crane and a construction method to adapt to the installation of the main beam of the suspension bridge under a variety of different conditions and ensure the construction efficiency. Summary of the invention

[0004] The object of the present invention is to provide a split cable-mounted crane and a construction method. The split structure is adopted, and the lifting mechanism is relatively independently arranged on the main cable in the form of a module, and a swinging device is correspondingly arranged above the main cable. The rapid movement of the lifting mechanism on the main cable is realized by the alternating swinging of the overhead crane, so that the cable-mounted crane can better adapt to the changes in the direction of the main cable. At the same time, the beam section to be erected is supported from below by the lifting bracket, and the lifting and installation of the beam section located at the intersection of the cable and the beam are realized in cooperation with the lifting device. Therefore, the main beam erection construction of the suspension bridge under various conditions is met while ensuring the construction efficiency.

[0005] In order to achieve these objects and other advantages according to the present invention, there is provided a split-type cable-mounted hoist, comprising:

[0006] Two lifting brackets, which are respectively arranged directly below the main cables on both sides, and any one of the lifting brackets is arranged along the length direction of the bridge and supports the beam section to be erected;

[0007] Two groups of lifting devices, which are respectively arranged on the main cables on both sides, each group of lifting devices includes a plurality of lifting mechanisms, which are arranged at intervals along the length direction of the main cable, the top of each lifting mechanism is fixedly connected to the main cable on the same side, and the bottom is connected to the lifting bracket on the same side, and the lifting mechanism is configured to adjust the vertical distance between the lifting bracket and the main cable;

[0008] Two sets of swing devices are respectively arranged directly above the main cables on both sides. Each set of swing devices includes a traction rope, which is arranged along the length direction of the main cable and anchored on both sides of the bridge; two overhead cranes are arranged on the traction ropes at intervals, and each overhead crane moves along the traction rope; two swing ropes correspond to the two overhead cranes respectively, and the top of each swing rope is connected to the corresponding overhead crane through a lifting device, and the bottom is detachably connected to the lifting mechanism on the same side.

[0009] Preferably, in the split cable-mounted crane, the lifting bracket includes a Bailey frame; a plurality of connecting seats, which are arranged at intervals on the bottom beam of the Bailey frame along the length direction of the bridge and correspond one-to-one to the plurality of lifting mechanisms, and any connecting seat is connected to the bottom of the corresponding lifting mechanism; and a plurality of supporting seats, which are arranged at intervals on the top beam of the Bailey frame, and any supporting seat is supported on the bottom of the beam section to be erected and is detachably connected thereto.

[0010] Preferably, in the split-type cable-mounted crane, the lifting mechanism includes a first cable clamp, the top of which is fixed on the main cable; a lifting jack, which is vertically arranged and the top of which is fixedly connected to the bottom of the first cable clamp; a rope collector, which is fixed on one side of the lifting jack; a steel strand, one end of which is fixed on the rope collector and the other end of which passes vertically downward through the lifting jack; and a lifting seat, which is located directly below the lifting jack, the top of which is fixedly connected to the bottom of the steel strand, and the bottom of which is detachably connected to the corresponding connecting seat.

[0011] Preferably, in the split-type cable-mounted crane, the lifting mechanism further comprises a second cable clamp fixed on the main cable, and the second cable clamp is located at an end of the first cable clamp which has a tendency to slide down and abuts against it.

[0012] Preferably, in the split-type cable-mounted crane, the lifting mechanism further comprises two brackets, which are symmetrically arranged on both sides of the lifting jack and do not interfere with the rope retractor;

[0013] The swing rope includes two swing ropes, which are respectively located on both sides of the overhead travelling crane and correspond to the two corbels. One end of any swing rope is connected to the overhead travelling crane through the lifting device, and the other end is detachably connected to the corresponding corbel.

[0014] Preferably, in the split-type cable-mounted crane, the lifting device is a hand winch, which is configured to adjust the lowering length of the swing rope.

[0015] The present invention also provides a construction method of the split-type cable-mounted crane, comprising:

[0016] S1. Install two sets of lifting devices on the main cables on both sides, set two lifting brackets on the ground below and fix the beam section to be erected on the top of the two lifting brackets, and then connect multiple lifting mechanisms on the same side to the lifting devices;

[0017] S2, using the two sets of lifting devices to synchronously drive the two lifting brackets to move upward until the beam section to be erected is lifted to the set installation position, using the hanger fixed on the main cable to install the beam section to be erected, and then releasing the connection between the installed beam section and the two lifting brackets;

[0018] S3, using the two sets of lifting devices to place the two lifting brackets on the ground, and releasing the connection between the lifting brackets on the same side and the multiple lifting mechanisms;

[0019] S4, respectively setting up swinging devices above the main cables on both sides, and using the swinging devices to sequentially swing multiple lifting mechanisms on the same side to the next beam section setting position on the main cables;

[0020] S5. Repeat steps S1-S4 to install the next beam section to be erected until all beam sections of the bridge are erected.

[0021] Preferably, in the construction method of the split-type cable-mounted crane, in S4, the method of using the swing device to perform swing construction on any lifting mechanism on the same side includes:

[0022] S41, using two swinging ropes to respectively connect two crown cranes on the same side with the lifting mechanism, setting the crown crane at the rear end in the construction direction as crown crane one, and the swinging rope connected thereto as swinging rope one, and the crown crane at the front end in the construction direction as crown crane two, and the swinging rope connected thereto as swinging rope two;

[0023] S42, moving the first overhead crane to the top of the lifting mechanism, and the second overhead crane to the oblique top of the lifting mechanism, controlling the first swing rope to be in a vertically taut state and the second swing rope to be in an inclined taut state through the lifting device, and then releasing the connection between the lifting mechanism and the main cable;

[0024] S43, lowering the first swing rope by means of a lifting device, so that the lifting mechanism gradually moves downward and tilts toward one side of the second overhead crane, until the lifting mechanism moves to the bottom of the second overhead crane and the second swing rope is converted into a vertically taut state;

[0025] S44, the second overhead crane remains stationary, the first overhead crane is moved to be close to the second overhead crane, and then the first swing rope is tightened by the lifting device, so that the first swing rope returns to a vertically tightened state and the lifting mechanism moves up to the original installation height, and then the second overhead crane is moved in the construction direction, so that the first swing rope returns to an inclined and tightened state;

[0026] S45. Repeat steps S43-S44 until the lifting mechanism moves to the next beam section erection position.

[0027] Preferably, in the construction method of the split-type cable-mounted crane, in S4, when any overhead crane reaches the length area where the boom is located during movement, the connection between the corresponding swing rope and the lifting mechanism is first released, and then the overhead crane is driven to cross the length area where the boom is located, and the swing rope and the lifting mechanism are connected again, and then subsequent swing construction is carried out according to the contents of the corresponding steps.

[0028] The present invention has at least the following beneficial effects:

[0029] 1. The present invention adopts a split structure and modular layout. Each lifting mechanism is connected to the main cable as an independent module, and relies on the alternating swing of two overhead cranes to quickly move the lifting mechanism to the next beam segment installation position on the main cable, solving the problem of rapid movement of the split cable-mounted crane between different lifting points. At the same time, the lifting bracket supports the beam segment to be erected from below, and cooperates with the lifting device to lift the main beam under the conventional main cable and the main beam of the cable-beam intersection section, solving the problem of beam segment lifting under the special condition of the cable-beam intersection section. Therefore, the split cable-mounted crane can better adapt to the construction of beam segments with large span and height changes of the main cable, and there is no need to perform additional modification to the cable-mounted crane or erect temporary brackets during construction, effectively ensuring construction efficiency and construction quality;

[0030] 2. The lifting mechanism of the present invention is installed on the main cable, so that construction workers can conveniently assist and monitor the lifting and installation of the beam section from the catwalk, and inspect and repair the lifting mechanism, thereby ensuring the stability of the construction and improving the safety of the construction;

[0031] 3. The lifting bracket of the present invention adopts the Bailey frame layering method, the connection seat connected to the lifting device is set on the bottom crossbeam, and the support seat connected to the beam section to be erected is set on the top crossbeam, so that the hoisting space of the steel strand on the lifting mechanism is increased without increasing the lifting bracket material, which can better adapt to the condition of limited space between the main cable and the bottom of the main beam at the intersection of the cable beam;

[0032] 4. The present invention uses a crown crane and a swinging rope to alternately move the lifting mechanism forward along the construction direction, avoiding the need to disassemble the lifting mechanism to the ground (or water surface) and then move it to the installation position of the next beam section when moving, thereby reducing the use of large lifting equipment and further improving construction efficiency.

[0033] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the front elevation structure of a split-type cable-mounted crane according to one embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the side elevation structure of the split-type cable-mounted crane described in the above embodiment;

[0036] Figure 3 It is a schematic diagram of the front elevation structure of the lifting bracket described in the above embodiment;

[0037] Figure 4 It is a schematic diagram of the side elevation structure of the lifting bracket described in the above embodiment;

[0038] Figure 5 It is a schematic diagram of the side elevation structure of the lifting mechanism described in the above embodiment;

[0039] Figure 6 It is a schematic diagram of the construction structure of S42 in a construction method of a split-type cable-mounted crane according to an embodiment of the present invention;

[0040] Figure 7 It is a schematic diagram of the construction structure of S43 in the above embodiment.

[0041] Description of reference numerals:

[0042] 1. Lifting bracket; 11. Bottom crossbeam; 12. Top crossbeam; 13. Connecting seat; 14. Support seat; 2. Lifting mechanism; 21. First cable clamp; 22. Lifting jack; 23. Rope retractor; 24. Steel strand; 25. Second cable clamp; 26. Corbel; 27. Hydraulic pump station; 31. Traction rope; 32. Overhead crane 1; 33. Swinging rope; 34. Lifting device; 35. Overhead crane 2; 41. Beam section to be erected; 42. Installed beam section; 5. Main cable; 6. Suspension rod; 7. Catwalk. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0044] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] like Figure 1-7 As shown, the present invention provides a split-type cable-mounted crane, comprising:

[0046] Two lifting brackets 1, which are respectively arranged directly below the main cables 5 on both sides, and any one of the lifting brackets 1 is arranged along the length direction of the bridge and supports the beam section 41 to be erected;

[0047] Two groups of lifting devices, which are respectively arranged on the main cables 5 on both sides, each group of lifting devices includes a plurality of lifting mechanisms 2, which are arranged at intervals along the length direction of the main cable 5, the top of each lifting mechanism 2 is fixedly connected to the main cable 5 on the same side, and the bottom is connected to the lifting bracket 1 on the same side, and the lifting mechanism 2 is configured to adjust the vertical distance between the lifting bracket 1 and the main cable 5;

[0048] Two groups of swing devices are respectively arranged directly above the main cables 5 on both sides. Each group of swing devices includes a traction rope 31, which is arranged along the length direction of the main cable 5 and anchored on both sides of the bridge; two overhead cranes are arranged on the traction rope 31 at intervals, and each overhead crane moves along the traction rope 31; two swing ropes 33 correspond to the two overhead cranes respectively, and the top of each swing rope 33 is connected to the corresponding overhead crane through a lifting device 34, and the bottom is detachably connected to the lifting mechanism 2 on the same side.

[0049] In the above technical solution, two lifting brackets 1 are symmetrically arranged on both sides of the bridge, and any lifting bracket 1 is located directly below the main cable 5 on the same side and is arranged along the length direction of the bridge. The two lifting brackets 1 respectively support the two sides of the beam section 41 to be erected, and cooperate with the two sets of lifting devices to adjust synchronously to achieve stable lifting of the beam section 41 to be erected. Due to the split structure, the multiple lifting mechanisms 2 in the lifting device are relatively independently distributed on the main cable 5, and the two lifting brackets 1 are also relatively independent and respectively connected to the two lifting devices. When the height of the main cable and the span between the main cables change, the construction position of the lifting mechanism and the support position of the lifting bracket can directly adapt to the change in the direction of the main cable, without the need to modify or adjust the original bracket, which effectively saves construction costs and ensures construction efficiency. At the same time, since the lifting bracket 1 supports the beam section 41 to be erected from below, the top of the beam section 41 to be erected can exceed the height position of the main cable 5 during lifting, so that the split cable-mounted crane can not only lift the main beam below the conventional main cable, but also lift the main beam at the cable-beam intersection section, solving the problem of beam section lifting under special conditions such as the cable-beam intersection section. In addition, two sets of swinging devices are correspondingly arranged above the two sets of lifting devices. The two overhead cranes of any set of swinging devices are respectively connected to the same lifting mechanism 2 through the swinging rope 33, and can swing alternately to realize the movement of the lifting mechanism 2 on the main cable 5. After the lifting device and the lifting bracket 1 cooperate to complete the lifting of the beam section 41 to be erected and hoist it on the main cable 5, the lifting bracket 1 is first removed from the lifting device to restore the lifting mechanism 2 to an independent state, and then the swinging device can be connected to the lifting mechanism 2. Specifically, the traction rope 31 is arranged just above the main cable 5 and parallel thereto. The overhead crane can move freely on the traction rope 31 by being driven by a conventional power device (motor, etc.). The two overhead cranes located on the same traction rope 31 are respectively the overhead crane 1 32 and the overhead crane 2 35 from the rear end to the front end in the construction direction. Both overhead cranes are connected to the lifting mechanism 2 through the swinging rope 33. In the initial state, the overhead crane 2 35 is located obliquely in front of the lifting mechanism 2. At this time, the swinging rope 33 of the overhead crane 1 32 is lowered, so that the lifting mechanism 2 approaches and moves downward in the direction of the overhead crane 2 35, and the lifting weight of the lifting mechanism 2 is gradually transferred to the overhead crane 2 35. Then, the overhead crane 1 32 is driven to approach the overhead crane 2 35, and the swinging rope 33 of the overhead crane 1 32 is tightened upward, so that the lifting mechanism 2 moves vertically upward and the lifting weight returns to the overhead crane 1 32, that is, the position movement of the lifting mechanism of a certain distance is completed in a single time. By respectively controlling the length of the lowering and tightening of the swing rope 33, it can be ensured that the relative height between the lifting mechanism 2 and the main cable 5 does not change after the lifting mechanism 2 moves downward and upward twice. Even if the main cable 5 itself changes in height, the lifting mechanism 2 can still be moved quickly and quickly reconnected with the main cable 5 after moving horizontally (along the length direction of the main cable 5).When the main cable 5 is being erected, a catwalk 7 for auxiliary construction is provided below, and the lifting mechanism 2 is installed on the main cable 5. Construction workers can conveniently assist and monitor the lifting and installation of the beam section from the catwalk 7, and inspect the lifting mechanism, thereby improving the safety of the construction while ensuring the stability of the construction. The erection of the swinging device can also make use of the original traction rope and overhead crane and other structures in the catwalk construction, making full use of the original auxiliary structures in the main cable construction, further saving construction time.

[0050] In this embodiment, the multiple lifting mechanisms in the same lifting device are two lifting mechanisms, which are respectively arranged at the two ends of the corresponding lifting bracket 1. When lifting the beam section 41 to be erected, the connection between the swing rope 33 and the lifting mechanism 2 is in an untied state, and four modular lifting mechanisms 2 are used to synchronously adjust the height of the lifting bracket 1 and the beam section 41 to be erected. When the beam section 41 to be erected is lifted in place and hoisted on the main cable 5, the connection between the installed beam section 42 and the lifting bracket 1 is untied, and the lifting bracket 1 is lowered to the ground or ship through the lifting mechanism 2, and then the connection between the lifting mechanism 2 and the lifting bracket 1 is untied, and the swing rope 33 and the lifting mechanism 2 are connected, and the swing device is used to swing the lifting mechanism 2 to move it to the construction position of the next beam section 41 to be erected. The above structure enables the split cable-mounted crane to better adapt to the construction of beam sections with large span changes and height changes in the main cable 5, and there is no need to perform additional modification of the cable-mounted crane or erection of temporary brackets during construction, which effectively ensures construction efficiency and construction quality.

[0051] In another technical solution, the split-type cable-mounted crane, the lifting bracket 1 includes a Bailey frame; a plurality of connecting seats 13, which are arranged on the bottom cross beam 11 of the Bailey frame at intervals along the length direction of the bridge and correspond to the plurality of lifting mechanisms 2 one by one, and any connecting seat 13 is connected to the bottom of the corresponding lifting mechanism 2; a plurality of supporting seats 14, which are arranged on the top cross beam 12 of the Bailey frame at intervals, and any supporting seat 14 is supported on the bottom of the beam section 41 to be erected and is detachably connected thereto. Wherein, the Bailey frame is a three-dimensional frame arranged along the length direction of the bridge. Taking the four lifting mechanisms 2 (two groups of lifting devices) in this embodiment as an example, corresponding to the two connecting mechanisms on the same side, connecting seats 13 are respectively arranged at both ends of the Bailey frame, and any connecting seat 13 is a lifting ear structure, which can be detachably connected to the lower end of the lifting mechanism 2, so as to facilitate the lifting of the entire Bailey frame by the lifting mechanism 2. Two supporting seats 14 are arranged in the middle of the Bailey frame, and the supporting seats 14 are used to support the beam section 41 to be erected, and are connected to the corresponding mounting seats on the beam section 41 to be erected by bolts. The lifting bracket 1 adopts a solution in which the connecting seats 13 at both ends are sunk (arranged on the bottom beam 11) and the middle supporting seat 14 is raised (arranged on the top beam 12). Without increasing the material of the lifting bracket, the lifting space when the lifting mechanism 2 is used to connect the lifting bracket 1 is increased, so that the overall split cable-mounted crane can better adapt to the limited bottom space conditions of the main cable and the beam section of the cable-beam intersection section, and conveniently and quickly carry out beam section lifting and erection construction, solving the problem of beam section lifting under special conditions such as cable-beam intersection sections.

[0052] In another technical solution, the split-type cable-mounted crane, the lifting mechanism 2 includes a first cable clamp 21, the top of which is fixed on the main cable 5; a lifting jack 22, which is vertically arranged and the top of which is fixedly connected to the bottom of the first cable clamp 21; a rope collector 23, which is fixed on one side of the lifting jack 22; a steel strand 24, one end of which is fixed on the rope collector 23, and the other end of which passes vertically downward through the lifting jack 22; a lifting seat, which is located directly below the lifting jack 22, the top of which is fixedly connected to the bottom of the steel strand 24, and the bottom of which is detachably connected to the corresponding connecting seat 13. Specifically, the first cable clamp 21 is a temporary cable clamp, which is a two-piece structure and can be closed and clamped from both sides to clamp the main cable 5. The two clamping pieces can be locked by bolts. The lower part of the first cable clamp 21 is connected to the external fixed structure (lifting jack bracket) of the lifting jack 22; the lifting jack 22 is a steel strand jack, and a rope take-up device 23 is installed on its side, which is used to cooperate with the steel strand jack to retract and release the steel strand 24; one end of the steel strand 24 is fixed on the rope take-up device 23, and the other end is coiled along the rope take-up device 23 and then vertically passes through the lifting jack 22 from above, and is connected to the connecting seat 13 on the lower lifting bracket 1. The lifting jack 22 can drive the steel strand 24 to move stably in the vertical direction, thereby controlling the displacement of the lifting bracket 1 in the vertical direction. In addition, the lifting mechanism 2 also includes a hydraulic pump station 27, which can be set on the catwalk 7 below the main cable 5 or on the construction platform above the main cable 5. The hydraulic pump station 27 is used to provide power for the lifting device. When the lifting device moves laterally, the hydraulic pump station 27 needs to be moved in the same direction to stably drive the lifting mechanism 2 to work. The steel strand jack can stably lift heavy objects, so that the beam section 41 to be erected remains stable during the lifting process, which is convenient for the rapid lifting of the beam section after it is lifted into place. The multiple lifting mechanisms of the lifting device have the same structure. In a modular way, a suitable number of lifting mechanisms are selected according to the size and specifications of the main beam section, which can adapt to the beam section lifting construction of different bridges in a variety of different environments.

[0053] In another technical solution, in the split-type cable-mounted crane, the lifting mechanism 2 further includes a second cable clamp 25, which is fixed on the main cable 5, and the second cable clamp 25 is located at the end of the first cable clamp 21 that has a tendency to slide down and abuts against it. In the above technical solution, the second cable clamp 25 is a locking cable clamp. Since the main cable 5 is arranged at a certain tilt angle, and the lifting mechanism 2 is affected by the pulling force of the heavy object to be lifted below after installation, the first cable clamp 21 has a tendency to slide down to one side (the construction direction or the opposite direction of the construction direction) on the main cable 5. Therefore, the end of the first cable clamp 21 that has a tendency to slide down is set as the sliding end, and the second cable clamp 25 is set at a position close to the lower sliding end of the first cable clamp 21. The second cable clamp 25 is fixed on the main cable 5 and can adjust the clamping force between the second cable clamp 25 and the main cable 5 by adjusting the prestress of the bolts on the second cable clamp 25. Therefore, the clamping condition of the second cable clamp 25 can be controlled according to the construction progress, so as to effectively prevent the lifting mechanism from sliding during the lifting construction process, and further ensure the stability of the entire split cable-mounted crane during construction.

[0054] In another technical solution, in the split-type cable-mounted crane, the lifting mechanism 2 further includes two brackets 26, which are symmetrically arranged on both sides of the lifting jack 22 and do not interfere with the rope retractor 23;

[0055] The swing rope 33 includes two swing ropes, which are respectively located on both sides of the overhead travelling crane and correspond to the two brackets 26 . One end of any swing rope is connected to the overhead travelling crane through the lifting device 34 , and the other end is detachably connected to the corresponding bracket 26 .

[0056] Among them, the two brackets 26 on the same lifting mechanism 2 are symmetrically located on both sides of the main cable 5 on the same side. To avoid interference, the rope take-up device 23 should be set on the side adjacent to both brackets 26 on the external fixed structure (lifting jack bracket) of the lifting jack 22, that is, the rope take-up device 23 is located at the front end or rear end (along the construction direction) of the lifting jack 22. The two brackets 26 correspond to two swinging ropes respectively. In this embodiment, one end of the swinging rope is fixed on the lifting device 34, and the other end extends vertically downward and is connected to the corresponding bracket 26 on the lifting jack 22. The lifting device 34 can synchronously lower or tighten the two swinging ropes to achieve the height adjustment of the lifting mechanism 2 below by the overhead crane. The connection structure between the brackets 26 symmetrically arranged on both sides of the main cable 5 and the swinging rope can further improve the stability of the swinging construction of the lifting mechanism using the swinging device.

[0057] In another technical solution, in the split-type cable-mounted crane, the lifting device 34 is a hand chain hoist, which is configured to adjust the lowering length of the swing rope 33. In this embodiment, the lifting device 34 is preferably a hand chain hoist. Since the swing device is located directly above the main cable 5 on the same side, the construction personnel can conveniently operate the hand chain hoist on the catwalk 7 to directly adjust the lowering length of the swing rope 33, thereby quickly and easily completing the swing construction of the lifting mechanism 2 without the need to install other large lifting equipment.

[0058] The present invention also provides a construction method of a split-type cable-mounted crane, comprising:

[0059] S1, install two sets of lifting devices on the main cables 5 on both sides, set two lifting brackets 1 on the ground below, fix the beam section 41 to be erected on the top of the two lifting brackets 1, and then connect multiple lifting mechanisms 2 on the same side to the lifting devices;

[0060] Among them, the beam section 41 to be erected is fixed on the top crossbeam 12 of the Bailey frame through multiple support seats 14. When installing any lifting mechanism 2, first fix the lifting mechanism 2 as a whole at the set position (installation position of the beam section 41 to be erected) below the main cable 5 through the first cable clamp 21, and install the second cable clamp 25 at the lower end of the first cable clamp 21, and then use the lifting jack 22 to lower the steel strand 24 so that the lifting seat is close to the connecting seat 13 on the lifting bracket 1 located on the ground, and use bolts to fix the lifting seat with the corresponding connecting seat 13; before officially starting the lifting construction, first increase the prestress of the bolts on the second cable clamp 25 as required to ensure that the first cable clamp 21 will not slide down along the main cable 5 after being subjected to the load tension of the beam section to be erected below;

[0061] S2, using the two sets of lifting devices to synchronously drive the two lifting brackets 1 to move upward until the beam section 41 to be erected is lifted to the set installation position, using the suspension rod 6 fixed on the main cable 5 to install the beam section 41 to be erected, and then releasing the connection between the installed beam section 42 and the two lifting brackets 1;

[0062] Among them, the lifting jack 22 drives the steel strand 24 to move upward, and the lower end of the steel strand 24 drives the lifting bracket 1 to move upward. At the same time, the rope retractor 23 synchronously reels the upper end of the steel strand 24 to ensure that the steel strand is reeled in neatly and will not affect the subsequent normal construction near the main cable 5 above the lifting jack 22 (hoisting the beam section to be erected, etc.); a plurality of suspension rods 6 are installed on the main cable 5 according to the design drawings, which are used to hoist the main beam (i.e., the beam section to be erected) in sections. The top end of any suspension rod 6 is fixed on the main cable 5, and the bottom end of the suspension rod 6 extends downward. After the beam section 41 to be erected is lifted into place, the beam section is fixed to the main cable 5 through the suspension rod 6 to complete the installation of the beam section; after the beam section is hoisted, the beam section 41 to be erected becomes the installed beam section 42, and the connection between the connecting seat 13 and the lifting seat can be released at this time;

[0063] S3, using the two sets of lifting devices to place the two lifting brackets 1 on the ground, and releasing the connection between the lifting brackets 1 and the multiple lifting mechanisms 2 on the same side;

[0064] After releasing the connection between the lifting bracket 1 and the lifting mechanism 2 (i.e. releasing the connection between the connecting seat 13 and the lifting seat), the steel strand 24 is lifted by the lifting jack 22 to move the lifting seat to the upper limit position, so that the lifting mechanism 2 can be moved to the next installation position by swinging.

[0065] S4, respectively setting up swinging devices above the main cables 5 on both sides, and using the swinging devices to sequentially swing the multiple lifting mechanisms 2 on the same side to the next beam section setting position on the main cables 5;

[0066] S5. Repeat steps S1-S4 to install the next beam section 41 to be erected until all beam sections of the bridge are erected.

[0067] In the above technical solution, the number of lifting mechanisms 2 on the same side is the same as the number of connecting seats 13 on the lifting bracket 1 and they are connected one by one. In this embodiment, a group of lifting devices includes two lifting mechanisms 2. Correspondingly, two connecting seats 13 are provided on the lifting bracket 1 on the same side as the group of lifting devices, which are respectively arranged at the two ends of the bottom crossbeam 11 of the Bailey frame. When the swinging device is used to move the lifting mechanism 2 in S4, a lifting mechanism 2 located at the front end of the construction direction is moved first, and then another lifting mechanism 2 is moved after the lifting mechanism 2 is moved into place; when the number of lifting mechanisms 2 in the same group of lifting devices is large, multiple lifting mechanisms 2 can also be moved synchronously by increasing the number of overhead cranes and swinging ropes to improve the efficiency of swinging construction.

[0068] In another technical solution, in the construction method of the split-type cable-mounted crane, in S4, the method of using the swing device to swing any lifting mechanism 2 on the same side includes:

[0069] S41, using two swinging ropes 33 to respectively connect the two crown cranes on the same side with the lifting mechanism 2, setting the crown crane at the rear end in the construction direction as crown crane 1 32, the swinging rope 33 connected thereto as swinging rope 1, the crown crane at the front end in the construction direction as crown crane 2 35, the swinging rope 33 connected thereto as swinging rope 2;

[0070] S42, move the crown block 1 32 to the top of the lifting mechanism 2, move the crown block 2 35 to the oblique top of the lifting mechanism 2, control the swing rope 1 to be in a vertically taut state and the swing rope 2 to be in an inclined taut state through the lifting device 34, and then release the connection between the lifting mechanism 2 and the main cable 5;

[0071] The first swing rope and the second swing rope are both connected to the brackets 26 on both sides of the lifting jack 22. When the lifting mechanism 2 is disconnected from the main cable 5, the first cable clamp 21 and the second cable clamp 25 are disconnected from the main cable 5. The first cable clamp 21 and the lifting jack 22 are swung as a whole. The second cable clamp 25 is removed from the main cable 5 and is kept in reserve. It will be installed after the lifting mechanism 2 is moved to the next construction position.

[0072] S43, lowering the swinging rope 1 through the lifting device 34, so that the lifting mechanism 2 gradually moves downward to one side of the crown block 2 35, until the lifting mechanism 2 moves to the right below the crown block 2 35 and the swinging rope 2 is converted to a vertically tightened state; at this time, the swinging rope 1 is converted to an inclined relaxed state, and the lifting weight of the lifting mechanism 2 is transferred from the crown block 1 32 to the crown block 2 35;

[0073] S44, the crown crane 2 35 remains stationary, the crown crane 1 32 is moved to make it close to the crown crane 2 35, and then the swing rope 1 is tightened by the lifting device 34, so that the swing rope 1 returns to the vertically tightened state and the lifting mechanism 2 moves up to the original installation height. At this time, the swing rope 2 is in a vertically relaxed state, and the lifting weight of the lifting mechanism 2 is transferred from the crown crane 2 35 to the crown crane 1 32; then the crown crane 2 35 is moved in the construction direction, so that the swing rope 2 returns to the inclined tightened state. At this time, the states of the lifting mechanism 2 and the swing rope 1 and the swing rope 2 all return to the initial state (the state of S42);

[0074] S45. Repeat steps S43-S44 until the lifting mechanism 2 moves to the next beam section erection position.

[0075] In another technical solution, in the construction method of the split-type cable-mounted crane, in S4, when any overhead crane reaches the length area where the suspension rod 6 is located during movement, the connection between the corresponding swing rope 33 and the lifting mechanism 2 is first released, and then the overhead crane is driven to cross the length area where the suspension rod 6 is located, and the swing rope 33 and the lifting mechanism 2 are connected again, and then subsequent swing construction is performed according to the contents of the corresponding steps. In the above technical scheme, since the swinging rope 33 is connected from the overhead traveling crane above the main cable 5 to the lifting mechanism 2 below the main cable 5, when the swinging device and the lifting mechanism 2 move laterally as a whole, the suspension rod 6 located on the main cable 5 will interfere with the above-mentioned overall moving mechanism. In order to prevent the suspension rod 6 and other lifting structures from blocking the smooth lateral movement of the swinging device, or the suspension rod 6 and the swinging rope 33 from being entangled, when the overhead traveling crane is about to pass through the length area where the suspension rod 6 is located, the connection between the swinging rope 33 on the overhead traveling crane and the lifting mechanism 2 is first contacted. At this time, only the other overhead traveling crane is used to bear the weight of the lifting mechanism 2. After the current overhead traveling crane passes over the suspension rod 6 area, the corresponding swinging rope 33 is reconnected with the bracket 26 of the lifting mechanism 2 to return to the normal swinging construction state. The above method ensures the smooth progress of the swinging construction. In addition, since a construction catwalk 7 is provided below the main cable 5, the connection between the swinging rope 33 and the bracket 26 can be conveniently disassembled and assembled repeatedly without affecting the construction efficiency.

[0076] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A split type cable-mounted crane, characterized in that: include: Two lifting brackets, which are respectively arranged directly below the main cables on both sides, and any one of the lifting brackets is arranged along the length direction of the bridge and supports the beam section to be erected; Two groups of lifting devices are respectively arranged on the main cables on both sides, and any group of lifting devices includes a plurality of lifting mechanisms, which are arranged at intervals along the length direction of the main cable, the top of any lifting mechanism is fixedly connected to the main cable on the same side, and the bottom is connected to the lifting bracket on the same side, and the lifting mechanism is arranged to adjust the vertical distance between the lifting bracket and the main cable; the lifting mechanism includes a first cable clamp, the top of which is fixed on the main cable; a lifting jack, which is vertically arranged and the top of which is fixedly connected to the bottom end of the first cable clamp; a rope collector, which is fixed on one side of the lifting jack; a steel strand, one end of which is fixed on the rope collector, and the other end of which passes vertically downward through the lifting jack; a lifting seat, which is located directly below the lifting jack, the top of the lifting seat is fixedly connected to the bottom end of the steel strand, and the bottom end of the lifting seat is detachably connected to the corresponding connecting seat; two brackets, which are symmetrically arranged on both sides of the lifting jack and do not interfere with the rope collector; Two groups of swinging devices, which are respectively arranged just above the main cables on both sides, each group of swinging devices includes a traction rope, which is arranged along the length direction of the main cables and anchored on both sides of the bridge; two overhead cranes, which are arranged on the traction ropes at intervals, and each overhead crane travels along the traction ropes; two swinging ropes, which correspond to the two overhead cranes respectively, the top of each swinging rope is connected to the corresponding overhead crane through a lifting device, and the bottom is detachably connected to the lifting mechanism on the same side, the swinging rope includes two swinging ropes, which are respectively located on both sides of the overhead crane and correspond to the two brackets, one end of each swinging rope is connected to the overhead crane through the lifting device, and the other end is detachably connected to the corresponding bracket, and the lifting device is a hand winch, which is configured to adjust the lowering length of the swinging rope; Among them, the lifting bracket includes a Bailey frame; a plurality of connecting seats, which are arranged at intervals on the bottom beam of the Bailey frame along the length direction of the bridge and correspond one-to-one to the plurality of lifting mechanisms, and any connecting seat is connected to the bottom of the corresponding lifting mechanism; a plurality of supporting seats, which are arranged at intervals on the top beam of the Bailey frame, and any supporting seat is supported on the bottom of the beam section to be erected and is detachably connected to it.

2. The split type cable-mounted crane according to claim 1, characterized in that: The lifting mechanism further comprises a second cable clamp fixed on the main cable, wherein the second cable clamp is located at an end of the first cable clamp which has a tendency to slide downward and abuts against the first cable clamp.

3. The construction method of the split-type cable-mounted crane according to any one of claims 1-2, characterized in that: include: S1. Install two sets of lifting devices on the main cables on both sides, set two lifting brackets on the ground below, fix the beam section to be erected on the top of the two lifting brackets, and then connect multiple lifting mechanisms on the same side to the lifting brackets; S2, using the two sets of lifting devices to synchronously drive the two lifting brackets to move upward until the beam section to be erected is lifted to the set installation position, using the hanger fixed on the main cable to install the beam section to be erected, and then releasing the connection between the installed beam section and the two lifting brackets; S3, using the two sets of lifting devices to place the two lifting brackets on the ground, and releasing the connection between the lifting brackets on the same side and the multiple lifting mechanisms; S4, respectively setting up swinging devices above the main cables on both sides, and using the swinging devices to sequentially swing multiple lifting mechanisms on the same side to the next beam section setting position on the main cables; S5. Repeat steps S1-S4 to install the next beam section to be erected until all beam sections of the bridge are erected.

4. The construction method of the split-type cable-mounted crane according to claim 3, characterized in that: In S4, the method of using the swing device to perform swing construction on any lifting mechanism on the same side includes: S41, using two swinging ropes to respectively connect two crown cranes on the same side with the lifting mechanism, setting the crown crane at the rear end in the construction direction as crown crane one, and the swinging rope connected thereto as swinging rope one, and the crown crane at the front end in the construction direction as crown crane two, and the swinging rope connected thereto as swinging rope two; S42, moving the first overhead crane to the top of the lifting mechanism, and the second overhead crane to the oblique top of the lifting mechanism, controlling the first swing rope to be in a vertically taut state and the second swing rope to be in an inclined taut state through the lifting device, and then releasing the connection between the lifting mechanism and the main cable; S43, lowering the first swing rope by means of a lifting device, so that the lifting mechanism gradually moves downward and tilts toward one side of the second overhead crane, until the lifting mechanism moves to the bottom of the second overhead crane and the second swing rope is converted into a vertically taut state; S44, the second overhead crane remains stationary, the first overhead crane is moved to be close to the second overhead crane, and then the first swing rope is tightened by the lifting device, so that the first swing rope returns to a vertically tightened state and the lifting mechanism moves up to the original installation height, and then the second overhead crane is moved in the construction direction, so that the first swing rope returns to an inclined and tightened state; S45. Repeat steps S43-S44 until the lifting mechanism moves to the next beam section erection position.

5. The construction method of the split-type cable-mounted crane according to claim 4, characterized in that: In S4, when any overhead crane reaches the length area where the boom is located during movement, the connection between the corresponding swing rope and the lifting mechanism is first released, and then the overhead crane is driven to cross the length area where the boom is located, and the swing rope and the lifting mechanism are connected again, and then subsequent swing construction is carried out according to the contents of the corresponding steps.

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