Inhaul cable for hoisting large-tonnage bridge prefabricated bearing platform

Abstract

The invention relates to the technical field of bridge hoisting, in particular to an inhaul cable for hoisting a large-tonnage bridge prefabricated bearing platform, which comprises a plurality of hoisting cables arranged between a hoisting tool cross beam and the prefabricated bearing platform, each hoisting cable comprises a cable body, one end of each cable body is provided with a first connecting assembly, and the first connecting assemblies are detachably connected with the hoisting tool cross beam; a second connecting assembly is installed at the other end of the cable body and detachably connected with the prefabricated bearing platform. The plurality of lifting cables are connected with the lifting appliance cross beam through the first connecting assemblies, so that the overall weight of the lifting appliance can be effectively reduced through the plurality of lifting cables, and the manufacturing cost of the lifting appliance can be reduced; and meanwhile, the plurality of hoisting cables are connected with the prefabricated bearing platform through the second connecting assemblies, so that the hoisting tool is convenient and rapid to install, and meanwhile, the prefabricated bearing platform can be hoisted more safely and reliably during hoisting.

Description

Technical Field

[0001] The invention relates to the technical field of bridge hoisting, and in particular to a cable used for hoisting a prefabricated cap of a large-tonnage bridge. Background Art

[0002] The prefabricated pier body in the bridge project is very heavy. When the existing conventional lifting scheme is adopted, the overall weight of the existing lifting equipment is often very heavy, resulting in high lifting costs. This puts higher requirements on the lifting equipment used. It is very necessary to select a more economical and safe lifting method. Therefore, there is an urgent need for a cable for lifting large-tonnage bridge prefabricated piers. During lifting, a large-tonnage lifting cable is used to connect the prefabricated pier and the lifting equipment crossbeam respectively, which can reduce the overall weight of the lifting equipment and reduce the manufacturing cost of the lifting equipment. It not only makes the installation of the lifting equipment convenient and quick, but also can lift the prefabricated pier more safely and reliably during lifting. Summary of the invention

[0003] The purpose of the present invention is to provide a cable for hoisting a prefabricated pier for a large-tonnage bridge, so as to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following solution: a cable for lifting a prefabricated pier of a large-tonnage bridge, comprising a plurality of lifting cables arranged between a lifting device crossbeam and the prefabricated pier, the lifting cable comprising a cable body, a first connecting component is installed at one end of the cable body, and the first connecting component is detachably connected to the lifting device crossbeam, and a second connecting component is installed at the other end of the cable body, and the second connecting component is detachably connected to the prefabricated pier.

[0005] Preferably, the number of the lifting ropes is set in even number, and the number of the lifting ropes is not less than four.

[0006] Preferably, the first connecting assembly includes an upper anchor cup fixedly connected to the cable body, an end of the upper anchor cup away from the cable body is threadedly connected to a lifting ear upper cover plate, and an outer wall of the upper anchor cup is mounted on the sling beam through a spherical portion.

[0007] Preferably, the spherical portion includes a spherical support sleeved on the upper anchor cup, and a spherical anchor ring is threadedly connected to one end of the upper anchor cup facing the lifting ear upper cover plate, and the spherical anchor ring is spherically connected to the spherical support.

[0008] Preferably, the outer wall of the spherical anchor ring is connected to the outer wall of the spherical support by a chain connection rigging.

[0009] Preferably, the chain connecting rigging includes a chain link, both ends of the chain link are respectively provided with chain shackles, one end of the chain shackle away from the chain link is detachably connected to the shackle, and one end of the shackle away from the chain shackle is detachably connected to the second lifting eye screw.

[0010] Preferably, the two second lifting eye screws are detachably connected to the outer wall of the spherical anchor ring and the outer wall of the spherical support respectively.

[0011] Preferably, one end of the spherical anchor ring away from the spherical support is threadedly connected with a first lifting eye screw, and the first lifting eye screw is detachably connected to the shackle.

[0012] Preferably, the second connecting assembly includes a lower anchor cup fixedly connected to the cable body, and the end of the lower anchor cup away from the cable body is threadedly connected with a single-ear joint, and the single-ear joint is detachably connected to the double-ear connecting plate of the prefabricated support platform through a connecting pin.

[0013] Preferably, the single-ear joint adopts a front round and rear square, and the thread of the single-ear joint is not retracted beyond the edge of the ear plate hole and transitions to the center of the edge of the ear plate hole through an inner cone angle.

[0014] The present invention discloses the following technical effects:

[0015] The plurality of lifting cables of the present invention are connected to the sling crossbeam through the first connecting assembly, which can effectively reduce the overall weight of the sling through the plurality of lifting cables and can reduce the manufacturing cost of the sling; at the same time, the plurality of lifting cables are connected to the prefabricated foundation through the second connecting assembly, which not only makes the installation of the sling convenient and quick, but also allows the prefabricated foundation to be lifted more safely and reliably during lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall front view structure of the present invention;

[0018] Figure 2 It is a schematic cross-sectional structural diagram of the first connecting component of the present invention;

[0019] Figure 3 It is a schematic cross-sectional structural diagram of the second connecting assembly of the present invention;

[0020] Figure 4This is a front view structural diagram of the chain connection rigging of the present invention;

[0021] Figure 5 It is a schematic diagram of the side view structure of the chain connection rigging of the present invention;

[0022] Figure 6 This is a three-view structural diagram of a single-ear connector of the present invention;

[0023] Figure 7 For the present invention Figure 6 Schematic diagram of the A-axis rotating structure;

[0024] Figure 8 It is a structural schematic diagram of the present invention when hoisting the prefabricated cap;

[0025] Among them, 1. Lifting ear upper cover plate; 2. Spherical anchor ring; 3. Spherical support; 4. Chain connecting rigging; 5. First lifting eye screw; 6. Upper anchor cup; 7. Rope body; 8. Lower anchor cup; 9. Single ear joint; 10. Lifting equipment beam; 11. Prefabricated pedestal; 41. Second lifting eye screw; 42. Shackle; 43. Chain shackle; 44. Chain link. DETAILED DESCRIPTION

[0026] The possible implementation schemes found in the art are:

[0027] Prefabricated bridge caps refer to a construction method in which the bridge caps are prefabricated in a factory or prefabrication yard and then transported to the bridge construction site for assembly. This method can improve construction efficiency, ensure construction quality, reduce on-site work intensity, and contribute to environmental protection.

[0028] At present, the construction technology of prefabricated caps and piers has been widely used in bridge construction. Through factory prefabrication, standardized production can be achieved, the accuracy and consistency of components can be improved, and on-site construction errors can be reduced, thereby ensuring the quality of the project. The construction process of prefabricated caps usually includes steps such as steel bar processing, formwork installation, concrete pouring, maintenance, and overall transportation.

[0029] The hoisting of prefabricated bridge caps is a commonly used construction technology in modern bridge construction, especially in large-scale cross-sea bridge projects. This technology can effectively improve construction efficiency, ensure project quality and reduce environmental impact. Prefabricated caps are usually made in factories or prefabrication yards, and then transported to the construction site for hoisting. Compared with the traditional on-site casting method, this method can reduce on-site operation time, improve the standardization of the structure, and reduce interference with the marine environment.

[0030] When hoisting the prefabricated bridge cap, the following key points should be noted:

[0031] Lifting point design: The design of the lifting point is crucial to ensure the stability of the platform during the lifting process. The design should take into account factors such as the weight distribution of the platform, the capacity of the lifting equipment, and the lifting path.

[0032] Lifting equipment: Choose appropriate lifting equipment according to the size and weight of the platform, such as large floating crane, crawler crane or gantry crane, etc. The choice of equipment is directly related to the safety and efficiency of the lifting operation.

[0033] Lifting plan: Develop a detailed lifting plan, including lifting sequence, lifting path, safety measures and emergency plans, to ensure the smooth progress of the lifting operation.

[0034] Safety measures: During the lifting process, a series of safety measures are taken, such as setting up safety warning areas, equipping full-time safety supervisors, using safety belts, etc., to prevent accidents.

[0035] Quality control: Carefully check the installed foundation to ensure that it is in the correct position, firmly connected, and meets the design requirements.

[0036] Case Application

[0037] The Hong Kong-Zhuhai-Macao Bridge is a typical example of the application of prefabricated bridge cap hoisting technology. In this project, the cap and pier are prefabricated as a whole, and the construction efficiency and quality are improved through automated steel bar processing and one-time integral pouring. In addition, prefabricated cap hoisting technology is also widely used in other large-scale bridge projects, demonstrating its important role in modern bridge construction.

[0038] The function of the spreader beam

[0039] The spreader beam is a structural element specially designed for lifting operations. It plays an important role in the lifting process. The main functions of the spreader beam include:

[0040] Maintain balance and stability: The sling beam helps maintain the horizontal state of the hoisted objects by increasing the number of fulcrums of the hoisting system, reducing the risk of swinging or overturning caused by imbalance, and improving the safety of hoisting operations.

[0041] Distribute the load: When lifting at multiple points, the sling beam can help distribute the load evenly, ensuring that each lifting point bears a similar weight, avoiding equipment damage or lifting failure due to concentrated load.

[0042] Simplified lifting operations: The sling crossbeam can make the connection between the sling and the hoisted object more direct and stable, simplifying the lifting operation, especially when handling large or heavy objects, and improving lifting efficiency and safety.

[0043] Protect the suspended objects: By reducing the direct pressure and friction of the slings on the surface of the suspended objects, the sling beam helps to protect the objects from damage and extend their service life.

[0044] Improve lifting efficiency: In the design of some lifting equipment, such as large steel beam lifting equipment with automatic positioning, the lifting beam can be combined with the automation mechanism to achieve fast and accurate lifting and placement, greatly improving work efficiency.

[0045] The spreader beam is a key component to ensure that the lifting operation is carried out safely and efficiently. The correct use and configuration of the spreader beam is very important when planning and executing the lift.

[0046] The Chinese patent publication number CN102852095A discloses a multifunctional hoisting system and construction steps for a prefabricated bridge pier, and specifically discloses a hoisting structure for hoisting the prefabricated pier and a positioning mechanism for adjusting the prefabricated pier in three directions. The hoisting structure is connected to a supporting truss through a flexible sling. The positioning mechanism is arranged between the supporting truss and the hoisting structure. The supporting truss is fixed on a steel pipe pile, and the steel pipe pile passes through the inner hole of the prefabricated cap. The hoisting structure is a hollow box-type structure. The prefabricated pier is fixed in the hoisting structure. The upper end of the hoisting structure is provided with an upper lifting lug for hoisting the hoisting structure, and the lower end of the hoisting structure is provided with a lower lifting lug for connecting with the prefabricated cap; the hoisting structure is pre-connected with the prefabricated cap through a steel hanger, wherein the joints at both ends of the steel hanger are U-shaped joints, one end of the steel hanger is connected to the lower lifting lug in the hoisting structure, and the other end of the steel hanger is connected to the embedded part lifting lug of the prefabricated cap.

[0047] The hoisting structure is provided with a pier tightening mechanism to prevent the prefabricated pier and the hoisting structure from relative displacement. The pier tightening mechanism is a lifting jack, which tightens the pier body of the prefabricated pier through the telescopic rod of the lifting jack to achieve the stability of the prefabricated pier.

[0048] The supporting truss is provided with a pile cap, and the upper end of the steel pipe pile is sleeved and fixed in the pile cap to achieve the fixation of the supporting truss and the steel pipe pile; the adjustment mechanism is a three-way jack adjustment mechanism, which is preferably arranged on the upper end surface of the pile cap in this embodiment.

[0049] A positioning limit device for limiting the positioning stroke of the positioning mechanism is arranged on the lower end surface of the hoisting structure, and the positioning limit device is a limiting baffle.

[0050] A steel pipe pile clamping mechanism is provided on the supporting truss to ensure the stability of the steel pipe pile. The steel pipe pile clamping mechanism includes tightening jacks arranged on both sides of the steel pipe pile. The output ends of the tightening jacks are connected to the steel pipe piles. The steel pipe piles are tightened by the output ends of the tightening jacks to achieve stability of the steel pipe piles.

[0051] A wedge block lifting and tightening mechanism and a hydraulic jack tightening mechanism are provided between the prefabricated foundation and the steel pipe pile. The wedge block lifting and tightening mechanism comprises a pair of slidingly connected wedge blocks (a downward convex wedge block and an upper convex wedge block). The wedge block away from the steel pipe pile, i.e. the downward convex wedge block, is connected to the supporting truss by a steel wire rope. When in use, by raising the height of the downward convex wedge block, the wedge block close to the steel pipe pile, i.e. the upper convex wedge block, will be squeezed to move toward the steel pipe pile, thereby stabilizing the steel pipe pile.

[0052] When in use, the hoisting structure, supporting truss and positioning mechanism are set at the established elevation, and the hoisting structure is connected to the prefabricated cap through a steel hanger that is consistent with the elevation; then the hoisting structure is lifted, and the pier jacking mechanism tightens the pier body; after the prefabricated pier reaches the predetermined position, the steel hanger is in a vertical state, the positioning mechanism falls on the upper end face of the pile cap at the upper end of the steel pipe pile, and the hoisting structure suspends the prefabricated pier and supports it through the positioning mechanism. At this time, the steel pipe pile clamping mechanism clamps the steel pipe pile, and the wedge block lifting and tightening mechanism and the hydraulic jack tightening mechanism tighten the steel pipe pile; the positioning mechanism accurately adjusts the prefabricated pier and the hoisting structure, and the subsequent construction is carried out after the adjustment is completed.

[0053] The Chinese patent publication number CN113428769A discloses an integrated lifting and positioning system and process for large offshore prefabricated piers, and specifically discloses an upper lifting device, a lifting device main beam, a steel lifting cable and a connecting base; the lifting device main beam is connected to the bottom of the upper lifting device through a transposition joint, a number of steel lifting cables are fixed on the lifting device main beam, a connecting base is fixed below the steel lifting cable, and the connecting base is used to fix the prefabricated parts. The lifting device main beam is the main load-bearing structure for lifting and positioning; the upper lifting device is connected to a crane ship.

[0054] The positioning system includes connecting steel wire ropes, a positioning base, a three-way positioning jack and a guide device; the guide device is fixed to the bottom of the positioning base, the guide device is composed of an inner layer and an outer layer, and a bayonet is formed between the inner layer and the outer layer. The three-way positioning jack is fixed on the positioning base. Preferably, the three-way jack is equipped with a displacement sensor to achieve precise positioning, especially the vertical locking accuracy can achieve millimeter level, and the three-way positioning jack is powered by a small generator fixed on the sling system. The positioning base is connected to the sling main beam through steel wire ropes. In this embodiment, a positioning base is connected to the sling main beam through four steel wire ropes, as shown in the figure, to ensure overall stability and to flexibly adapt to the position error of the steel cylinder; when the sling main beam falls on the three-way positioning jack, the three-way positioning jack can adjust the sling main beam up, down, left, right, front and back. A mechanical lock is provided on the three-way positioning jack to prevent position changes after the sling main beam is accurately adjusted. During the adjustment, the bottom of the main beam of the hoist falls on the adjustment system to bear the force. At this time, the upper hoist can be removed for the next prefabricated part to be hoisted. The upper hoist can correspond to the remaining hoist structures in multiple hoist systems to achieve the simultaneous installation requirements of multiple parts.

[0055] The pier holding device is used to lock the position between the prefabricated parts, the main beam of the hanger and the corresponding pile foundation at sea;

[0056] Among them, at least one positioning system is set at each of the four corners below the main beam of the sling, and the distance between the positioning systems at the four corners is set to correspond to the distance between the pile foundations located at the four corners at sea, so that the guide device can clamp the top of the steel pipe of the corresponding pile foundation.

[0057] A sling system for connecting prefabricated parts is set above the prefabricated parts. A three-way positioning system is connected below the main beam of the sling by a flexible steel wire rope. The positions of the positioning systems correspond to the steel casings of the constructed pile foundations. Upper locking parts are set on the four sides of the main beam of the sling, lower locking parts are set on the reserved holes of the pile foundation and prefabricated parts, and a guide device is set on the positioning base. The sling system is used to meet the needs of prefabricated part lifting. The main beam is connected to the positioning system through a flexible steel wire rope for synchronous lifting. At the same time, the flexible connection can adapt to the influence of the position error of the bottom device when the positioning system is installed. The positioning system is installed on the extended steel cylinder above the pile foundation through the guide device for load bearing. The vertical oil cylinder of the three-way positioning jack actively carries the load, realizing force conversion and force consistency. Through the action of the positioning system, millimeter-level precise positioning is achieved. The position of the positioning system is fixed by a mechanical lock. Through the pier holding device, double-layer pier holding is achieved to fix the relative position between the main beam of the sling, the pier and the prefabricated parts.

[0058] The system used in this patent is used for the hoisting and positioning process of large offshore prefabricated piers, including the following steps:

[0059] Step 1: Extend the steel pipe of the offshore pile foundation that needs to be connected to the guide device;

[0060] Step 2: Fix the prefabricated part through the connection base of the sling system, and hoist the positioning system together with the sling system by connecting the steel wire rope. Hoist the prefabricated part to the predetermined position through the crane ship and the sling system. The crane ship accurately positions the part within the control requirement of mm, and slowly lowers the prefabricated part so that the steel pipe enters the embedded hole of the prefabricated part.

[0061] Step three, continue to slowly lower it, so that the inner layer of the guide device enters the steel pipe, and the outer layer is located outside the steel pipe. The positioning system is fixed to the steel pipe through the guide device bayonet. The upper hoist continues to lower the prefabricated part to the set position, and the main beam of the hoist does not contact the three-way positioning jack. The main beam of the hoist is lifted by the three-way positioning jack to bear the force. After all the loads are transferred to the three-way positioning jacks of all positioning systems, the upper hoist is removed for the next prefabricated part to be hoisted. The upper hoist can correspond to the remaining hoist structures in multiple hoist systems to meet the needs of simultaneous installation of multiple pieces. Through the positioning system, the force conversion of the hoisting system is carried out, and the load is safely and stably supported on the pile foundation. At this time, the force of each support can be guaranteed to be consistent, and the requirements for the consistent elevation control of the top surface of each steel cylinder are low. The early steel cylinder processing is convenient, and the force conversion is safe and reliable.

[0062] Step 4: The prefabricated part is adjusted to the set position by the three-way adjustment jacks of all adjustment systems. In this embodiment, the three-way adjustment jacks are used to accurately adjust the position of the prefabricated pier. After the three-way adjustment jacks are adjusted, the vertical, horizontal and longitudinal positions of the jacks are locked. The prefabricated part is locked with the corresponding offshore pile foundation through the pier holding device to ensure that the relative positions of the main beam of the hanger, the prefabricated part and the offshore pile foundation do not change.

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] Embodiment 1

[0066] Reference Figure 1-Figure 8 The present invention provides a cable for lifting a prefabricated pier for a large-tonnage bridge, including a plurality of lifting cables arranged between a lifting device cross beam 10 and a prefabricated pier 11, the lifting cable including a cable body 7, a first connecting component is installed at one end of the cable body 7, and the first connecting component is detachably connected to the lifting device cross beam 10, and a second connecting component is installed at the other end of the cable body 7, and the second connecting component is detachably connected to the prefabricated pier 11.

[0067] The cable body 7 is made of high-strength steel wire, the tensile strength of which can reach: 1770Mpa or more, and the length accuracy is <10mm, the error is <5mm, the steel wire material has high strength, light overall weight, and makes the cable body 7 have a large elastic modulus, small deformation, safe and reliable quality, and can be used repeatedly, effectively reducing the cost of the sling.

[0068] The plurality of lifting cables of the present invention are connected to the sling crossbeam 10 through the first connecting assembly, which can effectively reduce the overall weight of the sling through the plurality of lifting cables and can reduce the manufacturing cost of the sling; at the same time, the plurality of lifting cables are connected to the prefabricated foundation 11 through the second connecting assembly, which not only makes the installation of the sling convenient and quick, but also allows the prefabricated foundation 11 to be lifted more safely and reliably during lifting.

[0069] Further optimization scheme, the number of hoisting ropes is set in even numbers, and the number of hoisting ropes is not less than four. By setting the number of hoisting ropes to be not less than four and the number of hoisting ropes to be configured in even numbers, the force can be synchronized during hoisting, effectively avoiding the occurrence of eccentric load.

[0070] Further optimizing the scheme, the first connecting assembly includes an upper anchor cup 6 fixedly connected to the cable body 7, and the end of the upper anchor cup 6 away from the cable body 7 is threadedly connected to the upper cover plate 1 of the lifting ear, and the outer wall of the upper anchor cup 6 is installed on the sling beam 10 through the spherical portion. The external thread of the upper cover plate 1 of the lifting ear is connected to the internal thread of the upper anchor cup 6, so that the upper cover plate 1 of the lifting ear can be effectively installed in the upper anchor cup 6.

[0071] According to a further optimized solution, the spherical portion includes a spherical support 3 mounted on an upper anchor cup 6, and a spherical anchor ring 2 is threadedly connected to one end of the upper anchor cup 6 facing the upper cover plate 1 of the lifting ear, and the spherical anchor ring 2 is spherically connected to the spherical support 3.

[0072] The sling beam 10 is provided with a plurality of cable holes, which are arranged one by one corresponding to the upper anchor cup 6; when the upper anchor cup 6 is inserted into the cable holes of the sling beam 10, it is anchored to the upper end of the sling beam 10 through the spherical anchor ring 2. At this time, the upper anchor cup 6 is in the cable holes, and the upper anchor cup 6 is threadedly connected to the spherical anchor ring 2.

[0073] In a further optimized solution, the outer wall of the spherical anchor ring 2 is connected to the outer wall of the spherical support 3 by a chain connecting rigging 4. A plurality of chain connecting riggings 4 are arranged on the outer wall of the spherical anchor ring 2 and the outer wall of the spherical support 3 at equal intervals.

[0074] A further optimized solution is that the chain connecting rigging 4 includes a chain link 44, and chain shackles 43 are respectively installed at both ends of the chain link 44, and the end of the chain shackle 43 away from the chain link 44 is detachably connected to the shackle 42, and the end of the shackle 42 away from the chain shackle 43 is detachably connected to the second lifting eye screw 41.

[0075] The chain shackle 43 and the eye shackle 42 facilitate disassembly and connection. At the same time, the chain connection rigging 4 can effectively prevent the spherical anchor ring 2 and the spherical support 3 from being separated due to the rotation of the spherical anchor ring 2 and the spherical support 3.

[0076] In a further optimized solution, two second eyebolts 41 are detachably connected to the outer wall of the spherical anchor ring 2 and the outer wall of the spherical support 3. The second eyebolts 41 facilitate the connection between the spherical anchor ring 2 and the spherical support 3.

[0077] In a further optimized solution, the end of the spherical anchor ring 2 away from the spherical support 3 is threadedly connected with a first eye screw 5, and the first eye screw 5 is detachably connected to the shackle 42. When the spherical anchor ring 2 is not installed on the spherical support 3, the end of the chain connecting rigging 4 away from the second eye screw 41 can be installed on the first eye screw 5 through the first eye screw 5, so that the chain connecting rigging 4 can be effectively placed on the spherical anchor ring 2.

[0078] To further optimize the solution, the second connecting component includes a lower anchor cup 8 fixedly connected to the cable body 7, and the end of the lower anchor cup 8 away from the cable body 7 is threadedly connected to a single-ear connector 9, and the single-ear connector 9 is detachably connected to the double-ear connecting plate of the prefabricated base 11 through a connecting pin.

[0079] A further optimized solution is that the single-ear joint 9 adopts a front-round and rear-square or flat structure, and the thread of the single-ear joint 9 does not exceed the edge of the ear plate hole and transitions to the center of the ear plate hole edge through an inner taper angle.

[0080] The single-ear joint 9 is connected to the double-ear connecting plate of the prefabricated foundation 11, and the single-ear joint 9 can greatly reduce the weight and processing cost of the connecting anchor, thereby reducing the overall lifting cost.

[0081] Working process:

[0082] After the upper anchor cup 6 is inserted into the cable hole of the sling beam 10, the spherical anchor ring 2 is anchored to the upper end of the sling beam 10. At this time, the upper anchor cup 6 is in the cable hole, and the upper anchor cup 6 is threadedly connected to the spherical anchor ring 2. Then, the spherical anchor ring 2 is connected to the spherical support 3 through the chain connection rigging 4. The chain connection rigging 4 can effectively prevent the spherical anchor ring 2 and the spherical support 3 from being separated due to the rotation of the spherical anchor ring 2 and the spherical support 3; then, the single-ear joint 9 is detachably connected to the double-ear connecting plate of the prefabricated base 11 through the connecting pin, and the lifting operation can be carried out.

[0083] Embodiment 2

[0084] The difference between this embodiment and the first embodiment is that the second connecting member adopts the same structure as the first connecting member, and is respectively connected to the hoisting device beam 10 and the prefabricated platform 11 through the first connecting member, so that the hoisting rope can achieve multifunctional hoisting.

[0085] Embodiment 3

[0086] The difference between this embodiment and the first embodiment is that the first connecting member adopts the same structure as the second connecting member, and is respectively connected to the hoisting device beam 10 and the prefabricated platform 11 through the second connecting member, so that the hoisting rope can achieve multifunctional hoisting.

[0087] Embodiment 4

[0088] The difference between this embodiment and the first embodiment is that the single-ear joint 9 adopts a structure with a round front and a square rear or a round front and a flat rear, is connected to the double-ear connecting plate of the prefabricated base 11 through a pin hole, and is screwed together with the external thread of the lower anchor cup 8 through an internal thread. The thread retraction of the single-ear joint 9 does not exceed the edge of the ear plate hole, and the retraction point is transitioned to the center of the edge of the ear plate hole through an internal cone angle.

[0089] In summary, the present invention provides a hoisting cable for prefabricated caps of large-tonnage bridges, which is used for hoisting prefabricated caps 11 of large-tonnage bridges. The hoisting cable and slings of the large-tonnage prefabricated caps 11 can greatly reduce the weight of the slings and reduce the hoisting costs. At the same time, the hoisting operation is simple, fast, safe, stable and reliable.

[0090] By setting a lifting ear cover plate 1 at one end of the cable body 7, the perforated installation of the cable body 7 is facilitated, a chain connecting rigging 4 is set at the spherical anchor ring 2 and the spherical support 3, and a first lifting eye screw 5 is set on the outer end face of the spherical anchor ring 2, so as to facilitate the anchoring and disassembly of the lifting cable.

[0091] A single-ear joint 9 is provided at one end of the cable body 7, which can be connected to the prefabricated pedestal 11 through the single-ear joint 9, and can also be connected to the prefabricated part through the end face of the lower anchor cup 8, so as to realize multifunctional lifting, multiple lifting, etc., and greatly improve the utilization rate of the lifting equipment and lifting cables.

[0092] At the same time, the single-ear joint 9 of the present invention can greatly reduce the weight and processing cost of the connecting anchor, thereby reducing the overall lifting cost; the lifting rope of the present invention has a large elastic modulus and a small deformation, and the absolute error and relative error in the manufacturing of the lifting rope are very small. When multiple ropes are subjected to force, the force is synchronized to avoid unbalanced loading and ensure the safety of lifting; the present invention can effectively reduce the lifting cost of the prefabricated pedestal 11 of the bridge.

[0093] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 should not be understood as a limitation on the present invention.

[0094] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A cable for hoisting a prefabricated cap for a large-tonnage bridge, characterized in that: It comprises a plurality of lifting cables arranged between a sling beam (10) and a prefabricated support platform (11), wherein the lifting cables comprise a cable body (7), one end of the cable body (7) being provided with a first connecting component, the first connecting component being detachably connected to the sling beam (10), and the other end of the cable body (7) being provided with a second connecting component, the second connecting component being detachably connected to the prefabricated support platform (11).

2. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 1 is characterized in that: The number of the lifting ropes is set in even number, and the number of the lifting ropes is not less than four.

3. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 1 is characterized in that: The first connecting assembly comprises an upper anchor cup (6) fixedly connected to the cable body (7); an end of the upper anchor cup (6) away from the cable body (7) is threadedly connected to a lifting ear upper cover plate (1); and an outer wall of the upper anchor cup (6) is mounted on the sling crossbeam (10) via a spherical portion.

4. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 3 is characterized in that: The spherical portion comprises a spherical support (3) sleeved on the upper anchor cup (6); one end of the upper anchor cup (6) facing the lifting ear upper cover plate (1) is threadedly connected with a spherical anchor ring (2); and the spherical anchor ring (2) is spherically connected to the spherical support (3).

5. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 4 is characterized in that: The outer wall of the spherical anchor ring (2) is connected to the outer wall of the spherical support (3) via a chain connection rigging (4).

6. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 5 is characterized in that: The chain connection rigging (4) comprises a chain link (44), and chain shackles (43) are respectively installed at both ends of the chain link (44), and one end of the chain shackle (43) away from the chain link (44) is detachably connected to a shackle (42), and one end of the shackle (42) away from the chain shackle (43) is detachably connected to a second eye screw (41).

7. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 6 is characterized in that: The two second lifting eye screws (41) are detachably connected to the outer wall of the spherical anchor ring (2) and the outer wall of the spherical support (3), respectively.

8. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 6 is characterized in that: One end of the spherical anchor ring (2) away from the spherical support (3) is threadedly connected to a first lifting eye screw (5), and the first lifting eye screw (5) is detachably connected to the shackle (42).

9. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 1 is characterized in that: The second connecting assembly comprises a lower anchor cup (8) fixedly connected to the cable body (7); one end of the lower anchor cup (8) away from the cable body (7) is threadedly connected to a single-ear joint (9); the single-ear joint (9) is detachably connected to a double-ear connecting plate of the prefabricated support platform (11) via a connecting pin.

10. The cable for hoisting a large-tonnage bridge prefabricated cap according to claim 9 is characterized in that: The single-ear joint (9) adopts a front round and rear square shape, and the thread of the single-ear joint (9) does not exceed the edge of the ear plate hole and transitions to the center of the edge of the ear plate hole through an inner cone angle.

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