A single cable independent load bearing crane system

Abstract

The application relates to a single-cable independent bearing crane system, which comprises a main longitudinal beam structure, a bearing outrigger of the main longitudinal beam structure, a walking structure, a traction structure, a counterweight and a control system. The bearing outrigger is in natural contact with a main cable. The walking structure comprises a roller assembly, the roller assembly comprises a roller outrigger, a roller connected with the roller outrigger and a lifting device. The lifting device adjusts the height of the roller outrigger to change the contact state between the main longitudinal beam structure and the main cable, realizes the switching of walking and hoisting modes, and installs the traction structure on both ends of the main longitudinal beam structure. The traction structure moves the main longitudinal beam structure along the main cable. The crane system further comprises a boom structure and the counterweight. The center of gravity of the crane system in the empty state is located below the center of the main cable. The application provides a single-cable independent bearing crane system. The center of gravity of the crane system and the fulcrum of the lifting rope are located below the center of the main cable, the dependence of the posture stability of the single-cable bearing system on the torsional resistance of the cable is broken, and the cross connection between the cables of the traditional crane is cancelled.

Description

Technical Field

[0001] This application relates to the field of bridge engineering technology, specifically to a single-cable independent load-bearing crane system, applicable to the construction of spatial multi-cable-plane, single-cable-plane, and parallel multi-cable-plane suspension bridges. Background Technology

[0002] Cable-stayed cranes are a type of beam-lifting equipment that utilizes the main cable for support, eliminating the need for additional temporary load-bearing cables (i.e., cable hoists). They offer advantages such as structural safety, lower cost, and convenient construction, and are widely used in suspension bridge construction, such as parallel cable-stayed bridges. Conventional cable-stayed cranes straddle two main cables and require lateral connections with high rigidity to maintain their stability. However, for spatial cable-stayed bridges, where the lateral spacing of the main cables is variable, conventional cable-stayed cranes are no longer suitable.

[0003] If the fixed-length cross bracing of the crane is replaced with a variable-length cross bracing device with a top support function, the length of the cross bracing needs to be frequently adjusted during the movement of the crane. Coordinating the longitudinal movement of the crane with the length adjustment of the cross bracing is difficult, resulting in a large amount of high-altitude work and low construction efficiency.

[0004] If temporary cable clamps are used as fulcrums for the hoisting cables, the crane system can be fixed to the main beam, and the cable winding and unwinding operations can be completed on the main beam. However, this type of crane system does not have a traveling function, the equipment turnover is slow, and additional cross bracing between cables is required to limit the lateral bending of the slings during the construction phase. Summary of the Invention

[0005] This application provides a single-cable independently supported crane system to solve the above-mentioned problems in the construction of the main beam of a spatial cable-stayed suspension bridge.

[0006] This application provides a crane system with independent single-cable support, comprising:

[0007] The main longitudinal beam structure is located above the main cable, and the main longitudinal beam structure is provided with at least two load-bearing legs, which are in natural contact with the main cable.

[0008] The traveling structure includes at least two sets of roller assemblies. Each set of roller assemblies includes roller legs mounted on the main longitudinal beam structure, rollers connected to the roller legs, and a lifting device. The lifting device adjusts the height of the roller legs to change the contact state between the main longitudinal beam structure and the main cable, thereby enabling the switching between traveling and hoisting modes.

[0009] A traction structure is installed at the end of the main longitudinal beam structure to traction the main longitudinal beam structure to move along the main cable;

[0010] The boom structure is hinged to the main longitudinal beam structure;

[0011] A counterweight is connected to the boom structure, and the counterweight ensures that the center of gravity of the crane system is located below the center of the main cable in the unloaded state.

[0012] And the control system that is electrically connected to the above structures.

[0013] In some embodiments, the end of the supporting leg is provided with an arc-shaped pad.

[0014] In some embodiments, the arc-shaped pad has a friction-reducing layer.

[0015] In some embodiments, the boom structure includes a first boom, a second boom, and a lifting connection device. The first boom and the second boom are both arranged around the main cable and are hinged to the supporting legs. The lifting connection device is connected to the first boom.

[0016] In some embodiments, the first boom includes a first boom rod hinged to the supporting leg, a second boom rod connected to the first boom rod, and a third boom rod connected to the second boom rod, wherein the lifting connection device is connected to the third boom rod.

[0017] In some embodiments, the second boom includes a fourth boom rod hinged to the supporting leg and a fifth boom rod connected to the fourth boom rod.

[0018] In some embodiments, the first boom and the second boom are straight or curved.

[0019] In some embodiments, the crane system is provided with a lifting structure, which includes a second winch, a hook pulley connected to the lifting connection device, and a lifting rope installed on the hook pulley and connected to the second winch. The support point of the lifting rope is located below the center of the main cable.

[0020] In some embodiments, the traction structure includes a first winch located at the end of the main longitudinal beam structure and multiple sets of anchoring devices, each set of anchoring devices including an anchoring cable clamp located on the main cable and an anchoring cable connecting the anchoring cable clamp and the first winch.

[0021] In some embodiments, the crane system is provided with an operating platform, which is connected to the boom structure and provides load-bearing space.

[0022] The beneficial effects of the technical solution provided in this application include:

[0023] This application provides a crane system with independent single-cable support. The center of gravity of the crane system and the fulcrum of the lifting rope are located below the center of the main cable. This eliminates the dependence of the single-cable support system on the torsional resistance of the cable for attitude stability, eliminates the cross-connection between cables in traditional cranes, breaks the constraints of changes in the lateral spacing of the main cable on the application of the crane, and avoids a series of problems caused by frequent length adjustments of the cross-connection between crane cables at high altitudes. At the same time, it allows the crane to twist around the main cable to release unbalanced torque, which can avoid the main cable bearing large torque. The crane has a traveling function, and the equipment can be turned around quickly. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the side elevation of the crane system in Embodiment 1 of the present invention.

[0026] Figure 2 This is a schematic diagram of the cross-section of the crane system in Embodiment 1 of the present invention.

[0027] Figure 3 This is a cross-sectional schematic diagram of the double main cable suspension bridge in the hoisting space of the crane system in Embodiment 1 of the present invention.

[0028] Figure 4 This is a cross-sectional schematic diagram of a crane system hoisting a single main cable suspension bridge in Embodiment 2 of the present invention.

[0029] Figure 5 This is a schematic diagram of the cross-section of the crane system in Embodiment 3 of the present invention.

[0030] Figure 6 This is a schematic diagram of the cross-section of the crane system in Embodiment 4 of the present invention.

[0031] Figure label:

[0032] 100. Crane System; 1. Main Longitudinal Beam Structure; 11. Support Legs; 12. Arc-shaped Pad; 2. Traveling Structure; 21. Roller Support Legs; 22. Rollers; 3. Traction Structure; 31. First Winch; 32. Anchoring Device; 321. Anchor Cable Clamp; 322. Anchor Cable; 4. Traction Structure; 41. First Boom; 411. First Boom Rod; 412. Second Boom Rod; 413. Third Boom Rod; 42. Second Boom; 421. Fourth Boom Rod; 422. Fifth Boom Rod; 43. Lifting Connection Device; 5. Counterweight; 6. Operating Platform; 61. First Operating Platform; 62. Second Operating Platform; 7. Lifting Structure; 71. Second Winch; 72. Hook Pulley Mount; 73. Lifting Rope; 200. Main Cable; 300. Catwalk; 400. First Main Beam Segment; 500. Second Main Beam Segment. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] This application provides a single-cable independent load-bearing crane system 100, which is suitable for the construction of spatial multi-cable-plane, single-cable-plane, and parallel multi-cable-plane suspension bridges.

[0035] Example 1

[0036] like Figure 1 and Figure 2 As shown, where, Figure 1 This is a schematic diagram of the side elevation of the crane system in Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of the cross-section of the crane system in Embodiment 1 of the present invention.

[0037] This application provides a single-cable independently supported crane system 100, which includes:

[0038] The main longitudinal beam structure 1 is located above the main cable 200. The main longitudinal beam structure 1 is provided with at least two load-bearing legs 11, and the load-bearing legs 11 are in natural contact with the main cable 200.

[0039] The traveling structure 2 includes at least two sets of roller assemblies. Each set of roller assemblies includes a roller support leg 21 mounted on the main longitudinal beam structure 1, a roller 22 connected to the roller support leg 21, and a lifting device (not shown). The lifting device adjusts the height of the roller support leg 21 to change the contact state between the main longitudinal beam structure 1 and the main cable 200, thereby realizing the switching between traveling and hoisting modes.

[0040] The traction structure 3 is installed at the end of the main longitudinal beam structure 1, which pulls the main longitudinal beam structure 1 to move along the main cable 200.

[0041] The boom structure 4 is hinged to the main longitudinal beam structure 1;

[0042] Counterweight 5 is connected to boom structure 4. Counterweight 5 ensures that the center of gravity of crane system 100 is located below the center of main cable 200 in the unloaded state.

[0043] And the control system (not shown) that is electrically connected to each of the above structures.

[0044] This application provides a crane system with independent single-cable support. The center of gravity of the crane system is located below the center of the main cable, which eliminates the dependence of the single-cable support system on the torsional resistance of the cable for attitude stability. It also eliminates the cross-connection between cables in traditional cranes, breaks the constraints of changes in the lateral spacing of the main cable on the application of the crane, and avoids a series of problems caused by frequent length adjustments of the cross-connection between the crane cables at high altitudes. At the same time, it allows the crane to twist around the main cable to release unbalanced torque, which can avoid the main cable bearing large torque. The crane has a traveling function, and the equipment can be turned around quickly.

[0045] like Figure 1 and Figure 2 As shown, the main longitudinal beam structure 1 is a steel member with a circular or square cross section, and the load-bearing legs 11 are two or more, spaced apart.

[0046] In some embodiments, the end of the supporting leg 11 is provided with an arc-shaped pad 12.

[0047] In some embodiments, the arc-shaped pad 12 is provided with a friction-reducing layer.

[0048] The supporting leg 11 makes natural contact with the main cable 200 through the arc-shaped pad 12.

[0049] The arc-shaped pad 12 is further provided with a friction-reducing layer, which can be a polymer material or other friction-reducing material, serving as a contact medium with the main cable 200 to further reduce friction and wear.

[0050] Unlike traditional crane systems that use clamps, this embodiment does not use clamps. The supporting leg 11 is in natural contact with the main cable 200, allowing the entire crane system 100 to rotate around the main cable 200 to a limited extent. However, the tangential movement along the center of the contact surface of the main cable 200 is restricted, allowing the crane to twist around the main cable to release unbalanced torque, avoiding the main cable from bearing large torque, and adapting to the inclined sling and its lateral rotation during construction.

[0051] In the traveling structure 2, the number and position of the roller assemblies are determined according to the size of the main longitudinal beam structure 1. In this embodiment, there are two sets of roller assemblies, which are spaced apart at both ends of the main longitudinal beam structure 1.

[0052] In the roller assembly, roller support leg 21 is mounted on the main longitudinal beam structure 1, and roller 22 is located below the main longitudinal beam structure 1; the lifting device adjusts the height of roller support leg 21, thereby adjusting the height of roller 22, and the lifting device is an electric or hydraulic device to achieve lifting.

[0053] For example, when the lifting device controls the roller outrigger 21 to descend, the roller 22 descends. At this time, the supporting outrigger 11 of the main longitudinal beam structure 1 is out of contact with the main cable 200, and the traction structure 3 pulls the main longitudinal beam structure 1 to move along the main cable 200, realizing the walking mode; when the lifting device controls the roller outrigger 21 to rise, the roller 22 rises. At this time, the supporting outrigger 11 of the main longitudinal beam structure 1 resumes contact with the main cable 200, realizing the hoisting mode.

[0054] In some embodiments, the traction structure 3 includes a first winch 31 located at the end of the main longitudinal beam structure 1 and multiple sets of anchoring devices 32. Each set of anchoring devices 32 includes an anchoring cable clamp 321 located on the main cable 200 and an anchoring cable 322 connecting the anchoring cable clamp 321 and the first winch 31.

[0055] Two sets of traction structures 3 are installed at both ends of the main longitudinal beam structure 1. Through the cooperation of the first winch 31 and the anchoring device 32, the crane system 100 has a bidirectional alternating traction and walking function, realizing unloaded movement and anti-slip when suspended.

[0056] In some embodiments, the boom structure 4 includes a first boom 41, a second boom 42, and a lifting connection device 43. The first boom 41 and the second boom 42 are both arranged around the main cable 200 and are hinged to the supporting leg 11. The lifting connection device 43 is connected to the first boom 41.

[0057] The boom structure 4 adopts a wraparound design, bypassing the catwalk 300. It is independently supported by a single main cable and can rotate around the main cable 200, adapting to the inclined sling and its lateral rotation during construction.

[0058] The first boom 41 and the second boom 42 of the boom structure 4 are both hinged to the supporting legs 11 of the main longitudinal beam structure 1 to ensure that the boom structure 4 on the elevation is always close to the plumb line.

[0059] In some embodiments, the first boom 41 includes a first boom rod 411 hinged to the supporting leg 11, a second boom rod 412 connected to the first boom rod 411, and a third boom rod 413 connected to the second boom rod 412, and the lifting connection device 43 is connected to the third boom rod 413.

[0060] In some embodiments, the first boom 41 consists of a first boom rod 411, a second boom rod 412, and a third boom rod 413 arranged perpendicularly to each other, with the third boom rod 413 arranged parallel to the first boom rod 411. Together, they form a structure surrounding the main cable 200, which can bypass the catwalk 300 and rotate around the center of the connecting hinge axis with the main longitudinal beam structure 1, i.e., the first boom rod 411, thus possessing a large lateral bending load-bearing capacity. Of course, in other embodiments, the number, size, hinge position, and structure of the boom rods can also be adjusted as needed, as long as they can surround the main cable 200 and bypass the catwalk 300.

[0061] In some embodiments, the second boom 42 includes a fourth boom rod 421 hinged to the support leg 11 and a fifth boom rod 422 connected to the fourth boom rod 421.

[0062] In some embodiments, the second boom 42 consists of a fourth boom rod 421 and a fifth boom rod 422 arranged perpendicularly to each other, forming a structure that surrounds the main cable 200. It can bypass the catwalk 300 and rotate around the center of the hinge axis connecting to the main longitudinal beam structure 1, i.e., the fourth boom rod 421, thus possessing a large lateral bending resistance. Of course, in other embodiments, the number, size, hinge position, and structure of the boom rods can be adjusted as needed, as long as they can surround the main cable 200 and bypass the catwalk 300.

[0063] In some embodiments, the first boom 41 and the second boom 42 are straight in shape, but can also be extended to other shapes with circumferential features, such as arcs.

[0064] The counterweight 5 is connected to the fifth boom rod 422 of the second boom 42 of the boom structure 4. The counterweight 5 makes the center of gravity of the crane system 100 located below the center of the main cable 200 in the unloaded state.

[0065] Specifically, the size of the counterweight 5 affects the overall center of gravity and attitude of the crane system 100 in the unloaded state. The counterweight 5 adjusts the horizontal distance between the center of gravity of the crane system 100 and the center of gravity of the main cable 200 in the unloaded state, ensuring that its equivalent center of gravity is below the center of the main cable 200, and controls the attitude of the crane system 100 in the unloaded state to avoid spatial conflict between the crane system 100 and the already mounted inclined cable when the crane system 100 is in a moving state.

[0066] In some embodiments, the crane system 100 is provided with an operating platform 6, which is connected to the boom structure 4 to provide load-bearing space.

[0067] The operating platform 6 includes a first operating platform 61 and a second operating platform 62. The first operating platform 61 is connected to the third boom rod 413 of the first boom 41 of the boom structure 4, and the second operating platform 62 is connected to the fifth boom rod 422 of the second boom 42 of the boom structure 4.

[0068] The first operating platform 61 and the second operating platform 62 provide different load-bearing spaces. For example, the first operating platform 61 carries the lifting power unit, lifting structure, workers, control system, and other construction equipment. The operating platform 62 carries the counterweight 5, workers, control system, etc.

[0069] The control system is installed on the first operating platform 61 or the second operating platform 62. It is the control set for all electric devices in the crane system 100 and can issue commands for crane movement and lifting.

[0070] In some embodiments, the crane system 100 is provided with a lifting structure 7, which includes a second winch 71, a hook pulley 72 connected to the lifting connection device 43, and a lifting rope 73 installed on the hook pulley 72 and connected to the second winch 71. The support point of the lifting rope 73 is located below the center of the main cable 200.

[0071] The support point of the lifting rope 73 affects the posture of the crane system 100 during the lifting process. By using counterweights, the equivalent center of gravity of the crane system 100 is also located below the center of the main cable 200, allowing the crane system 100 to rotate around the main cable 200 to a limited extent.

[0072] In some embodiments, the power unit in the crane system 100 is a through-hole jack assembly.

[0073] In some embodiments, the crane system 100 is further provided with a continuous, non-clamping safety device to improve the safety factor of the connection between the crane system 100 and the main cable 200.

[0074] like Figure 3 and Figure 4 As shown, where, Figure 3This is a cross-sectional schematic diagram of the double main cable suspension bridge in the hoisting space of the crane system in Embodiment 1 of the present invention. Figure 4 This is a cross-sectional schematic diagram of a crane system hoisting a single main cable suspension bridge in Embodiment 2 of the present invention.

[0075] like Figure 3 and Figure 4 As shown, the crane system can be used to lift the first main girder segment 400 of a spatial double-main-cable suspension bridge, as well as the second main girder segment 500 of a single-main-cable suspension bridge.

[0076] like Figure 4 As shown, the difference between Embodiment 2 and Embodiment 1 is only that: a sixth boom rod is added to the second boom 42, which is perpendicular to the fifth boom rod 422, and a lifting structure 7 is arranged at the counterweight 5.

[0077] Example 3

[0078] like Figure 5 As shown, Figure 5 This is a schematic diagram of the cross-section of the crane system in Embodiment 3 of the present invention.

[0079] The difference between Embodiment 3 and Embodiment 1 is that the first boom 41 only includes the first boom rod 411 and the second boom rod 412. The first operating platform 61 is connected to the second boom rod 412 of the first boom 41 of the boom structure 4. The lifting connection device 43 is connected to the second boom rod 412 and changes the internal positional relationship of the lifting structure 7 according to the position of the second winch 71.

[0080] like Figure 6 As shown, Figure 6 This is a schematic diagram of the cross-section of the crane system in Embodiment 4 of the present invention.

[0081] The only difference between Embodiment 4 and Embodiment 3 is that the hook pulley 72 is located on the second boom rod 412, thus changing the position of the second winch 71.

[0082] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the method or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0083] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0084] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A crane system with independent single-cable support, characterized in that, It includes: The main longitudinal beam structure (1) is located above the main cable (200). The main longitudinal beam structure (1) is provided with at least two load-bearing legs (11). The load-bearing legs (11) are in natural contact with the main cable (200), allowing the entire crane system (100) to rotate around the main cable (200) in a limited manner, and allowing the crane system (100) to twist around the main cable (200) to release unbalanced torque. The walking structure (2) includes at least two sets of roller assemblies. Each set of roller assemblies includes a roller support leg (21) installed on the main longitudinal beam structure (1), a roller (22) connected to the roller support leg (21), and a lifting device. The lifting device adjusts the height of the roller support leg (21) to change the contact state between the main longitudinal beam structure (1) and the main cable (200), thereby realizing the switching between walking and hoisting modes. The traction structure (3) is installed at the end of the main longitudinal beam structure (1) and pulls the main longitudinal beam structure (1) to move along the main cable (200); The boom structure (4) is hinged to the main longitudinal beam structure (1); The counterweight (5) is connected to the boom structure (4), and the counterweight (5) makes the center of gravity of the crane system (100) under no-load conditions located below the center of the main cable (200); And the control system that is electrically connected to the above structures.

2. The crane system with single-cable independent load-bearing as described in claim 1, characterized in that, The end of the supporting leg (11) is provided with an arc-shaped pad (12).

3. The crane system with single-cable independent load-bearing as described in claim 2, characterized in that, The arc-shaped pad (12) has a friction-reducing layer inside.

4. The crane system with single-cable independent load-bearing as described in claim 1, characterized in that, The boom structure (4) includes a first boom (41), a second boom (42), and a lifting connection device (43). The first boom (41) and the second boom (42) are both arranged around the main cable (200) and are hinged to the supporting leg (11). The lifting connection device (43) is connected to the first boom (41).

5. A crane system with independent single-cable support as described in claim 4, characterized in that, The first boom (41) includes a first boom rod (411) hinged to the supporting leg (11), a second boom rod (412) connected to the first boom rod (411), and a third boom rod (413) connected to the second boom rod (412). The lifting connection device (43) is connected to the third boom rod (413).

6. A crane system with independent single-cable support as described in claim 4, characterized in that, The second boom (42) includes a fourth boom rod (421) hinged to the supporting leg (11) and a fifth boom rod (422) connected to the fourth boom rod (421).

7. A crane system with independent single-cable support as described in claim 4, characterized in that, The first boom (41) and the second boom (42) are either straight or curved.

8. A crane system with independent single-cable support as described in claim 4, characterized in that, The crane system (100) is provided with a lifting structure (7), which includes a second winch (71), a hook pulley (72) connected to the lifting connection device (43), and a lifting rope (73) installed on the hook pulley (72) and connected to the second winch (71). The support point of the lifting rope (73) is located below the center of the main cable (200).

9. A crane system with independent single-cable support as described in claim 1, characterized in that, The traction structure (3) includes a first winch (31) located at the end of the main longitudinal beam structure (1) and multiple sets of anchoring devices (32). Each set of anchoring devices (32) includes an anchoring cable clamp (321) located on the main cable (200) and an anchoring cable (322) connecting the anchoring cable clamp (321) and the first winch (31).

10. A crane system with independent single-cable support as described in claim 1, characterized in that, The crane system (100) is equipped with an operating platform (6), which is connected to the boom structure (4) to provide a load-bearing space.

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