Construction structure of suspension bridge based on catwalk first and saddle lifting later

Abstract

The present application relates to the technical field of bridge construction hoisting and transportation, and specifically discloses a suspension bridge construction structure based on catwalk first and cable saddle later lifting, including a hoisting device arranged at the top of the tower, a displacement frame arranged at the catwalk load-bearing cable, and a catwalk plate arranged near the displacement frame; the displacement frame is arranged near the top of the tower, the displacement frame is only connected to a number of catwalk load-bearing cables in the middle, and a T-shaped slide is provided at the position where the displacement frame contacts the catwalk load-bearing cables at the edge; the catwalk plate is connected to the catwalk load-bearing cables at the edge through a number of guide rail blocks, and a number of T-shaped sliders on the guide rail are combined into a T-shaped slide rail; the displacement frame can be driven by the hoisting device to move to the bottom of the catwalk plate, and the displacement frame is separated from the catwalk load-bearing cables at the edge when it moves to the bottom of the catwalk plate and the T-shaped slider is embedded in the T-shaped slide. The purpose of the present invention is to solve the problem that the existing cable saddle production is delayed and cannot be supplied in time, resulting in the inability to carry out the subsequent catwalk, main cable and other construction processes normally, causing the overall construction period of the bridge to be delayed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction and transportation, and in particular to a suspension bridge construction structure based on first a catwalk and then a cable saddle lifting. Background Art

[0002] In the process of building long-span bridges across canyons, rivers, seas, etc., due to the extremely large span, based on cost economic considerations, ground-anchored suspension bridge structures are generally used. The saddle is an important load-bearing component of the suspension bridge. Usually, the main tower saddle is installed using a gantry lifting system. The conventional construction process is based on the convenience and safety of construction. Usually, the main tower saddle is lifted and installed first, and then the catwalk construction is carried out in sequence.

[0003] At present, cable saddles mainly adopt a fully cast or cast-welded structural design. The cast-welded combination means that the saddle head used for limiting and directly bearing the main cable is formed by a casting process, while the saddle head and the saddle body are combined by a welding process. Cast steel parts have the characteristics of uneven structure, coarse internal grains and loose structure, which leads to low mechanical properties. As the span of the suspension bridge increases, the weight of the saddle body becomes heavier. In a 2,000-meter suspension bridge, the weight of the main cable saddle is basically at the level of 200 tons, which is a huge challenge for the transportation and installation of the cable saddle, especially in mountainous areas. This problem is more obvious. Therefore, in the construction of large-span suspension bridges, a new type of forging and welding combined cable saddle structure is adopted to reduce the weight of the cable saddle and increase the strength of the cable saddle.

[0004] However, the adoption of this new structure changed the cable saddle design, and the newly designed cable saddle structure needed to be experimentally verified for structural strength, resulting in delayed cable saddle production and inability to deliver them in a timely manner. Secondly, existing bridges require customized production due to different structures, and most cable saddles are manufactured using casting processes. However, since traditional casting processes rely heavily on highly polluting energy sources such as coal and coke, the combustion of these energy sources will produce a large amount of pollutants, as well as a large amount of dust and exhaust gas. In recent years, environmental protection requirements for the foundry industry have been increased, and a large number of small foundries have been closed due to their inability to meet environmental protection requirements. Therefore, cast cable saddles are mainly commissioned to a limited number of large foundries for production, resulting in a large accumulation of orders from large foundries. Even cable saddles produced by casting generally have problems with delayed construction.

[0005] If the construction is carried out according to the conventional suspension bridge construction process, the catwalk construction process will not be able to proceed as planned; since the catwalk is a necessary construction channel for the bridge superstructure construction, the overall construction period of the bridge will be delayed by several months, with losses of tens of millions of yuan. Summary of the invention

[0006] In view of the deficiencies in the prior art, the technical problem solved by the present invention is to provide a suspension bridge construction structure based on lifting the catwalk first and then the saddle, so as to solve the problem that the existing saddles are delayed in production and cannot be supplied in time, resulting in the subsequent catwalk, main cable and other construction processes being unable to proceed normally, causing the overall construction period of the bridge to be delayed.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is: a suspension bridge construction structure based on lifting the catwalk first and then the cable saddle, including a hoisting device arranged on the top of the tower, a displacement frame arranged on the catwalk load-bearing cables, and a catwalk plate arranged near the displacement frame; the displacement frame is arranged near the top of the tower, the displacement frame is only connected to a plurality of catwalk load-bearing cables in the middle, and is in contact with the catwalk load-bearing cables at the edge, and a T-shaped slide groove is provided at the position where the displacement frame contacts the catwalk load-bearing cables at the edge; the catwalk plate is detachably connected to the catwalk weighing cable in the middle, and the catwalk plate is connected to the catwalk load-bearing cables at the edge through a plurality of guide rail blocks, the upper part of the guide rail block is detachably fixed to the catwalk plate and the catwalk load-bearing cables at the edge, and a T-shaped slider that can be embedded in the T-shaped slide groove is provided at the lower end of the guide rail block, and a plurality of T-shaped sliders are combined into a T-shaped slide rail; the displacement frame can be driven to move to the bottom of the catwalk plate by the hoisting device, and the displacement frame makes the T-shaped slider embedded in the T-shaped slide groove when it moves to the bottom of the catwalk plate.

[0008] The beneficial effects of this program are:

[0009] The catwalk load-bearing cables generally pass through the rotating cable saddle at the top of the tower and then are adjusted to be evenly distributed in the horizontal direction through the displacement frame. The rotating cable saddles are set on both sides of the main cable saddle. There are usually 6 to 10 catwalk load-bearing cables. The two catwalk weighing cables at the edge do not need to be displaced. The main purpose is to evenly separate the multiple catwalk load-bearing cables in the middle through the displacement frame to make the force uniform. During the normal catwalk construction process, the displacement frame is fixed to the middle catwalk weighing cable, and the catwalk board is also detachably fixed to all the catwalk load-bearing cables. By setting the displacement frame close to the tower top, the displacement frame can be used as a catwalk panel; when it needs to be moved, the displacement frame is connected to the lifting equipment, the catwalk panel and the multiple catwalk load-bearing cables in the middle are disassembled and separated, but the two catwalk load-bearing cables at the edge are still fixed; then the catwalk load-bearing cables and the fixing parts of the displacement frame are disassembled, so that the displacement frame can slide relative to the catwalk load-bearing cables in the middle, and the displacement frame is driven by the lifting equipment to move to the bottom of the catwalk panel, so that during the movement of the displacement frame, the displacement frame close to the side of the tower top is moved. The multiple catwalk load-bearing cables in the middle are evenly spaced and arranged along the catwalk to the two sides of the displacement frame, thereby leaving horizontal space for the main cable saddle to be hoisted; when the displacement frame moves to the lower end of the catwalk board, the T-shaped slide rail is embedded in the T-shaped slide groove, and when the displacement frame is completely moved below the catwalk board, the longitudinal distance between the displacement frame and the tower top meets the longitudinal space requirements for the main cable saddle to be hoisted; thus, the hoisting equipment at the tower top can hoist the main cable saddle from the quadrilateral space composed of the tower top, catwalk load-bearing cables, and displacement frame to the tower top. After the main cable saddle is hoisted, the displacement frame and catwalk board are reset to complete the subsequent main cable and other construction.

[0010] The catwalk load-bearing ropes that are normally arranged in parallel are concentrated through the rotating saddles on both sides of the main tower saddle through the displacement frame to meet the lateral space requirements for the saddle hoisting; the displacement frame is moved to leave sufficient space for the subsequent saddle hoisting, and the saddle can be hoisted from the space between the catwalk load-bearing ropes, so that the saddle construction can also be carried out after the catwalk construction is completed. This avoids the entire catwalk construction being affected by the production period of the main saddle, resulting in a delay in the construction period; the saddle can be hoisted after the catwalk construction. The mutual influence between the catwalk construction and the saddle construction is effectively solved, ensuring that the entire bridge construction can be carried out on schedule.

[0011] When dismantling the catwalk board, only the connection with the catwalk load-bearing cable that needs to be displaced in the middle is removed, but the connection with the two catwalk load-bearing cables at the edge is maintained, thereby improving the safety of the catwalk board during dismantling; when moving, the displacement frame is only separated from the two catwalk load-bearing cables at the edge, and the displacement frame can slide to the bottom of the catwalk board through the cooperation of the T-shaped slide groove and the T-shaped slide rail, so that the connection between the catwalk board and the catwalk load-bearing cables at the edge does not interfere with the movement of the displacement frame, and the lifting space of the main cable saddle is made available through the movement of the displacement frame without dismantling the original catwalk; thereby effectively saving the time, materials and labor costs wasted in manually dismantling the catwalk panel and restoring the catwalk panel. In addition, when dismantling the catwalk manually, all the catwalk panels close to the top of the tower need to be dismantled, and after dismantling, only the narrow catwalk load-bearing cables can be walked, which poses a great safety hazard and is prone to dangerous accidents. However, this solution only requires separating the catwalk board from the middle load-bearing cable to leave sliding space for the displacement frame, and the displacement frame only needs to be separated from the catwalk load-bearing cables at the edge, but is still connected to the catwalk load-bearing cables in the middle. At the same time, since the displacement frame is connected to the lifting equipment, it is equivalent to the lifting equipment limiting the position of the displacement frame, so that the displacement frame remains relatively fixed with the catwalk load-bearing cables when the lifting equipment is not pulled, so that when the workers dismantle the relevant connection points and return to the top of the tower, they can still walk through the displacement frame, and safety is guaranteed; at the same time, when driving the displacement frame to move, the operator can control the lifting equipment at a safe position on the top of the tower to drive the displacement frame to slide, and the operation process is safer.

[0012] At the same time, due to the connection between the upper end of the displacement frame and the catwalk handrail rope, it plays a guiding role during the movement of the displacement frame.

[0013] Furthermore, the T-shaped sliders are connected with limiting ropes, and the deformation distance between the T-shaped sliders is limited by the limiting ropes between the two T-shaped sliders, so that the positions of the T-shaped sliders will not be greatly offset during the movement of the displacement frame, so that the T-shaped sliders can be smoothly inserted into the T-shaped slots.

[0014] Furthermore, the hoisting equipment includes a gantry installed on the top of the main tower, the gantry adopts a truss structure, a cable saddle introduction port is reserved on the front side of the gantry, slide rails are arranged in parallel on the top of both sides of the gantry, and a traction system is installed at the end of the gantry, and the traction system is a winch;

[0015] A sliding platform is installed on the slide rail, and the sliding platform is slidably connected to the slide rail. A load-bearing shaft is fixed on the front side of the sliding platform, and a rotatable drum is arranged outside the load-bearing shaft. The cable of the traction system is wound around the drum.

[0016] A cavity is provided in the bearing shaft, in which a control assembly is installed, a plurality of first positioning holes are provided on the side wall of the slide rail, and a plurality of second positioning holes are evenly distributed on the inner wall of the rotating drum along the circumferential direction; the control assembly includes a first positioning rod that can slide along the axial direction of the cavity, and the first positioning rod enters the first positioning hole to position the sliding platform; the control assembly also includes a positioning column that penetrates the side wall of the bearing shaft and can slide radially along the bearing shaft, and the positioning column enters the second positioning hole to position the rotating drum;

[0017] A tension spring I is sleeved on the first positioning rod so that the first positioning rod is subjected to a force that pushes it toward the first positioning hole. A piston I is provided at the end of the first positioning rod that is away from the first positioning hole. The two sides of the piston I are respectively the first oil chamber where the first positioning rod is located and the second oil chamber where the positioning column is located. When the first oil chamber is pressurized, the piston I moves toward the second oil chamber, the first positioning rod is disengaged from the first positioning hole, and the second oil chamber pushes the positioning column into the second positioning hole, thereby switching the positioning state of the sliding platform to the rotating drum positioning state. A tension spring II is provided below the positioning column so that the positioning column is subjected to a force that pulls it away from the second positioning hole. When the pressure of the first oil chamber is relieved, the tension spring I pushes the first positioning rod toward the first positioning hole, the pressure of the second oil chamber is reduced, and the tension spring II pulls the positioning column out of the second positioning hole, thereby switching the rotating drum positioning state to the sliding platform positioning state.

[0018] In this preferred embodiment, the structure of the lifting equipment is optimized.

[0019] First, the structure of the hoisting equipment is optimized. In the process of lifting the saddle, the vertical and horizontal movements of the saddle are driven by the same traction system (such as a hoist); in the existing hoisting equipment, the lateral movement and vertical movement need to adopt independent driving mechanisms. Therefore, the hoisting equipment of this scheme is more streamlined in structure and more convenient to install. The specific hoisting process is that the sliding platform is positioned at the front end of the gantry through the cooperation of the first positioning rod and the first positioning hole. At this time, the drum is in a rotatable state. After the saddle is hung, the traction system reels the cable, and the friction between the cable and the drum causes the drum to rotate, so that the saddle can be lifted; when the saddle is lifted to a certain height, the first oil chamber is pressurized, and the pressure in the second oil chamber will also increase. In conjunction with the rotation of the drum, when the positioning column is opposite to the second positioning hole, the positioning column will enter the second positioning hole, and the drum will no longer be able to rotate. At this time, the first positioning rod will also be separated from the first positioning hole, and the traction force of the traction system will be converted into pulling the sliding platform to slide, realizing lateral movement. That is, the large power system of this solution only needs one set of winches. The control component is an extremely weak power device compared to the winch. The two are linked to achieve weak control of strong. By using fewer large devices and more small devices, the installability of the lifting equipment is improved. The lateral movement and vertical movement drive systems are independent of each other, which increases the difficulty of installation.

[0020] Secondly, it has more advantages in extending the controllability of the lifting equipment. The control component set in the cavity of the load-bearing shaft only plays a control role in switching the state, so it does not require excessive driving force and large power equipment; secondly, due to the incompressibility of hydraulic oil, the positioning state of the sliding platform and the positioning state of the drum are in a mutually restrained state, that is, when the sliding platform is in the positioning state, the drum will be in a rotatable state, and when the drum is in the positioning state, the sliding platform is in a slidable state; therefore, after the traction system is started, the state can be switched only by the control component. In the original lifting equipment, vertical movement and lateral movement are driven by different devices and need to be controlled independently, so the factors affecting its controllability have increased. In this scheme, the state can be switched through a single control, and the factors affecting its controllability are greatly reduced. With the development of intelligent control, automatic control is an inevitable trend of development. Since the lifting weight of the saddle is extremely large, its safety consideration must be placed in the first place. If there are many factors affecting its controllability when introducing automatic control, its safety risk will increase. Therefore, by reducing the factors affecting controllability, more favorable conditions are provided for the introduction of automatic control.

[0021] Furthermore, the slide rail is in an inclined state with a higher end, and the inclination angle is 5-8 degrees. A traction system is set at the end of the gantry, which can switch the saddle in three directions: rising, falling, and moving backward; when the track is in a horizontal state, the sliding platform needs to move forward, and a driving structure needs to be set; and by setting the slide rail at an angle, the sliding platform can be moved by its own gravity.

[0022] Furthermore, a buffer chamber is provided on the side of the second oil chamber away from the first oil chamber, and a piston II and a compression spring abutting against the piston II are provided in the buffer chamber, and a positioning screw is provided in the second oil chamber, and the compression spring presses the piston II toward the positioning screw; a positioning seat is provided below the positioning column, and the positioning seat is threadedly connected to the side wall of the load-bearing shaft, and a positioning surface is provided on the positioning seat, and the positioning surface forms a stepped surface with the outer side surface of the positioning column; the piston I contacts the outer side surface of the positioning column, the first positioning rod is still matched with the first positioning hole, the piston I contacts the positioning surface of the positioning seat, and the first positioning rod is disengaged from the first positioning hole.

[0023] Since hydraulic oil is incompressible, by setting a buffer chamber, during the change from the first positioning rod and the first positioning hole being in full cooperation to the piston I contacting the outer side of the positioning column, the first positioning rod and the first positioning hole are still in cooperation, and when the positioning column and the second positioning hole are also aligned, the buffer chamber provides conditions for the piston I to move to the outer side of the positioning column; if the piston I continues to move forward, the positioning column needs to be aligned with the second positioning hole, and the positioning column enters the second positioning hole, and the plug I can contact the positioning surface of the positioning seat. That is, by controlling the piston I to move in stages, the impact force on the piston and the positioning column can be reduced. On the contrary, when the pressure of the first oil chamber is removed, the positioning column and the second positioning hole are still in cooperation; after the first positioning hole is aligned with the first positioning rod, the first positioning rod enters the first positioning hole, and the positioning column can be separated from the second positioning hole.

[0024] Since there is a risk of hydraulic oil leakage, once the hydraulic oil in the second oil chamber leaks, the rotating drum and the sliding platform may be in an unlocked state, which poses a safety risk; in this solution, the piston I cooperates with the outer side of the positioning column and the positioning surface of the positioning seat to ensure that the positioning state of the sliding platform and the positioning state of the rotating drum are in a mutually restrained state.

[0025] Furthermore, the buffer chamber maintains a normal pressure state, thereby facilitating the resetting of the piston II in the buffer chamber.

[0026] Furthermore, a first wedge-shaped surface inclined downward is provided on one side of the displacement frame close to the catwalk board, and a second wedge-shaped surface cooperating with the first wedge-shaped surface is provided on one end of the catwalk board close to the displacement frame. The cooperation of the two wedge-shaped surfaces facilitates the displacement frame to slide to the lower end of the catwalk board during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the installation of the displacement device of the present invention and the catwalk load-bearing cable;

[0028] Figure 2 It is a top view of the displacement frame and catwalk board;

[0029] Figure 3 It is a side sectional view of the displacement frame sliding under the catwalk board;

[0030] Figure 4 for Figure 1 Enlarged view of part A in the middle;

[0031] Figure 5 It is a schematic diagram of the lifting equipment;

[0032] Figure 6 It is a state diagram of the sliding platform in the lifting state;

[0033] Figure 7 for Figure 6 A magnified view of part A;

[0034] Figure 8 for Figure 6 A magnified view of part B;

[0035] Fig. 9 It is a state diagram of the sliding platform during the switching process from the lifting state to the lateral movement state;

[0036] Fig.10 It is the state diagram of the sliding platform in the lateral movement state;

[0037] Fig.11 A top view of the quadrilateral hoisting space for the main saddle to be left when the displacement frame is fully moved to the bottom of the catwalk;

[0038] Fig.12 Schematic diagram of the connection between the catwalk board and multiple catwalk ropes in the middle.

[0039] The figure marks in the drawings of the specification include: catwalk load-bearing cable 1, catwalk handrail cable 11, guide system 12, displacement frame 13, T-slot 131, U-shaped lock 132, catwalk board 14, guide rail block 15, T-shaped slider 151, limit rope 152, door frame 21, traction system 22, sliding platform 23, slide rail 24, first positioning rod 31, piston I32, positioning column 33, positioning seat 34, sealing cover 35, piston II36, buffer chamber 37, second oil chamber 38, first oil chamber 39, positioning screw 41, second positioning stud 42, oil inlet nozzle 43, collar 44, mounting plate 231, load-bearing shaft 232, rotating drum 233, catwalk board 5, connecting rod 51, screw rod 52, driven wheel 521, conveyor belt 522, connecting plate 53, pull rod 54, baffle 55, tower top 6. DETAILED DESCRIPTION

[0040] The following is further described in detail through specific implementation methods:

[0041] As attached Figure 1-4 , Figure 11-12 As shown: This embodiment takes 8 catwalk load-bearing cables as an example to illustrate a suspension bridge construction structure based on catwalk first and cable saddle lifting, including a hoisting device arranged on the top of the tower, a displacement frame 13 arranged on the catwalk load-bearing cables 1, and a catwalk board 14 arranged near the displacement frame; the displacement frame 13 is arranged near the top of the tower, and a panel for construction workers to walk on is welded in the middle of the displacement frame 13. The displacement frame 13 is only detachably fixedly connected to the 6 catwalk load-bearing cables 1 in the middle through a U-shaped lock buckle 132, and a T-shaped slide groove 131 is provided at the position where the displacement frame 13 contacts the 2 catwalk load-bearing cables 1 at the edge; as shown Fig.12As shown, the catwalk board 14 and the six catwalk load-bearing cables 1 in the middle are detachably fixed by U-shaped locks, and the catwalk board 14 is connected to the two catwalk load-bearing cables 1 at the edge by multiple guide rail blocks 15. The upper part of the guide rail block 15 is bolted to the catwalk board 14 and the edge catwalk load-bearing cables 1, and the lower end of the guide rail block 15 is fixed with a T-shaped slider 151 that can be embedded in the T-shaped slide groove. Several T-shaped sliders are combined into a T-shaped slide rail, and the T-shaped sliders are connected to each other with limiting ropes 152 for limiting; the T-shaped slide groove 131 is larger than the T-shaped slider 151, so that the T-shaped slider 151 can still be embedded in the T-shaped slide groove 131 when there is a slight offset; the displacement frame 13 can be moved to the bottom of the catwalk board 14 under the drive of the lifting equipment, and the displacement frame 13 is no longer in contact with the two catwalk load-bearing cables 1 at the edge when it moves to the bottom of the catwalk board 14, and the T-shaped slider 151 is embedded in the T-shaped slide groove 131.

[0042] The column at the upper end of the displacement frame 13 is slidably connected to the catwalk handrail cable 11. Due to the connection between the column at the upper end of the displacement frame 13 and the catwalk handrail cable 11, the displacement frame plays a guiding role during its movement.

[0043] When it is necessary to move, the displacement frame is connected to the lifting equipment, and the catwalk traction system of the original catwalk construction is used as the guide system 12 to fix the guide rail on the catwalk door frame; the catwalk panel 14 is disassembled and separated from the 6 catwalk load-bearing cables 1 in the middle, but the two catwalk load-bearing cables 1 at the edge are still fixed; then the U-shaped lock connecting the 6 catwalk load-bearing cables 1 in the middle and the displacement frame 13 is loosened but still kept connected, leaving a gap for the catwalk load-bearing cables and the displacement frame to slide, so that the displacement frame 13 can slide relative to the catwalk load-bearing cables 1 in the middle, and the guide system 12 is pulled by the lifting equipment to pull the displacement frame 13 to move under the catwalk panel 14, so that during the movement of the displacement frame 13, Figure 1 , Figure 2 As shown, the displacement frame moves from left to right. At this time, since the 6 catwalk weighing cables in the middle are still connected to the displacement frame, the 6 catwalk load-bearing cables in the middle follow the movement of the displacement frame under the guidance of the displacement frame, and guide the multiple catwalk load-bearing cables 1 in the middle of the displacement frame 13 near the tower top from being evenly spaced laterally along the catwalk to both sides of the displacement frame 13, thereby leaving lateral space for the main cable saddle to be hoisted; Figure 3As shown, when the displacement frame 13 moves to the lower end of the catwalk board, the T-shaped slide rail is embedded in the T-shaped slide groove 131. At this time, since the displacement frame 13 is not connected to the two catwalk load-bearing ropes 1 at the edge, but is connected to the 6 catwalk load-bearing ropes in the middle, and the catwalk board 14 is connected to the two catwalk load-bearing ropes at the edge, but not to the 6 catwalk load-bearing ropes in the middle, the displacement frame can slide to the bottom of the catwalk board through the cooperation of the T-shaped slide groove and the T-shaped slide rail 151. When the displacement frame moves to the bottom of the catwalk board, it means that the T-shaped slider 151 is embedded in the T-shaped slide groove of the displacement frame. Since the catwalk load-bearing ropes at the edge are connected to the guide rail block, and the T-shaped slider is located at the lower end of the guide rail block, when the displacement frame 13 moves to the bottom of the catwalk board 14, the two catwalk load-bearing ropes at the edge are located above the displacement frame 13 and do not contact the displacement frame 13; so that the connection between the catwalk board 14 and the catwalk load-bearing ropes at the edge does not interfere with the movement of the displacement frame 13, because the displacement frame 13 is located below the catwalk board 14 and is connected to the 6 catwalk load-bearing ropes in the middle, so that the 6 catwalk load-bearing ropes in the middle are slightly lower than the two catwalk load-bearing ropes at the edge; Fig.11 As shown, when the displacement frame is completely moved to the bottom of the catwalk board, the longitudinal distance between the displacement frame 13 and the tower top meets the longitudinal space requirement for the main cable saddle hoisting; thus, the hoisting equipment at the tower top can hoist the main cable saddle to the tower top through the quadrilateral hoisting space formed by the tower top 6, the catwalk load-bearing cable 1, and the displacement frame 13. After the main cable saddle is hoisted, the displacement frame 13 is reset to complete the subsequent main cable and other construction.

[0044] like Figure 5-10 As shown, the hoisting equipment includes a gantry 21 installed on the top of the main tower. The gantry 21 adopts a truss structure. A saddle inlet is reserved on the front side of the gantry 21. Slide rails 24 are arranged in parallel on the tops of both sides of the gantry 21. A traction system 22 is installed at the end of the gantry 21. The traction system 22 in this embodiment is a winch. The slide rail 24 is inclined at an angle of 8°. The end at the saddle inlet is the lower end. The slide rail 24 is slidably connected to the slide platform 23. The lower end of the slide platform is rotatably connected to a slider. The slider is embedded in the slide rail. The slider can also adopt a roller group. Therefore, in the case of no interference from other external forces, the slide platform 23 will slide toward the end of the saddle inlet under its own gravity.

[0045] Two mounting plates 231 are welded to the bottom surface of the sliding platform 23, and both ends of the load-bearing shaft 232 pass through the mounting plates 231 and are welded to the mounting plates 231, so that the load-bearing shaft 232 and the sliding platform 23 are in a fixed state; the load-bearing shaft 232 is located between the opposite side walls of the two sides of the slide rails 24, and the end face of the load-bearing shaft 232 is in contact with the side of the slide rail 24 or there is a very small gap, so that the load-bearing shaft 232 can slide relative to the slide rail 24. A rotatable drum 233 is disposed outside the bearing shaft 232, and the cable of the traction system 22 is wound around the drum 233. When the sliding platform 23 is fixed on the slide rail 24, the friction between the cable and the drum 233 drives the drum 233 to rotate, so that the saddle can be lifted; and when the drum 233 is fixed to the bearing shaft 232, and the sliding platform 23 and the slide rail 24 are in a sliding state, the traction system 22 can drive the sliding platform 23 to slide on the slide rail 24 through the friction between the cable and the drum 233. Here, the state in which the cable can be raised and lowered when the drum 233 rotates is defined as the lifting state, and the state in which the sliding platform 23 moves laterally is positioned as the transverse movement state. In order to realize the switching between the lifting state and the transverse movement state, the control component is introduced below.

[0046] As attached Figure 6 As shown, a cavity is provided inside the bearing shaft 232, and a control assembly is installed in the cavity. A plurality of first positioning holes are provided on the side wall of the slide rail 24, and four second positioning holes are evenly distributed on the inner wall of the rotating drum 233 along the circumferential direction; the control assembly includes a first positioning rod 31 that can slide along the axial direction of the cavity, and the first positioning rod 31 enters the first positioning hole to position the sliding platform 23. The first positioning rod 31 cooperates with the first positioning holes at different positions, and the sliding platform 23 can be positioned at different positions on the slide rail 24. The control assembly also includes a positioning column 33 that penetrates the side wall of the bearing shaft 232 and can slide radially along the bearing shaft 232, and the positioning column 33 enters the second positioning hole to position the rotating drum 233.

[0047] As attached Figure 7 , Attachment Figure 8As shown, a tension spring I is sleeved on the first positioning rod 31 so that the first positioning rod is pushed toward the first positioning hole. A piston I32 is provided at the right end of the first positioning rod 31, and the two sides of the piston I32 are respectively the first oil chamber 39 where the first positioning rod 31 is located and the second oil chamber 38 where the positioning column 33 is located. The side wall of the first oil chamber 39 is provided with two threaded holes, one of which is used to connect the oil inlet nozzle 43 to pressurize the hydraulic oil into the first oil chamber 39, and the other threaded hole is used to thread the second positioning stud 42. The second positioning stud 42 is screwed into the first oil chamber 39 to limit the piston I32 to limit the extension stroke of the first positioning rod 31; secondly, the tension spring I should be in a tensioned state, and both ends of it need to be fixed. Therefore, a ring 44 is welded at one end of the tension spring I, and a limiting hole is provided on the ring 44. The right end of the first positioning column 31 is provided with a threaded hole. The ring 44 can be positioned on the first positioning rod 31 by inserting the stud into the limiting hole and cooperating with the thread, and the threaded hole for installing the second positioning stud 42 can be used to insert the above-mentioned stud into the limiting hole. As shown in the attached Figure 6 As shown, a sealing cover 35 is threadedly connected to the left side of the cavity, the first positioning rod 31 passes through the sealing cover 35 and forms a sealed connection, the other end of the tension spring I is welded to the sealing cover 35, or a gasket is provided under the sealing cover 35, tightening the thread can tighten the gasket, and the tension spring I is welded to the gasket.

[0048] A tension spring II is provided below the positioning column 33 so that the positioning column 33 is subjected to a force that pulls the positioning column 33 away from the second positioning hole. A positioning seat 34 is provided below the positioning column 33. The positioning seat 34 is threadedly connected to the side wall of the second oil chamber 38. A blind hole that matches the end of the positioning column 33 is provided on the positioning seat 34 to further limit the positioning column 33. The front end of the positioning column 33 (i.e., the end that matches the second positioning hole) forms a step shape with the end, and an annular groove is provided on the step surface. One end of the tension spring II is inserted into the annular groove to be fixed to the positioning column 33. The fixing method is the same as that of the tension spring I. The other end of the tension spring II is welded to the positioning seat 34. A positioning surface is set on the positioning seat 34. The positioning surface and the outer side surface of the front end of the positioning column 33 are also stepped surfaces; the piston I32 contacts the outer side surface of the front end of the positioning column 33, the first positioning rod 31 is still matched with the first positioning hole, and the piston I32 contacts the positioning surface of the positioning seat 34, and the first positioning rod 31 is disengaged from the first positioning hole.

[0049] A buffer chamber 37 is provided at the right end of the second oil chamber 38, a piston II36 and a compression spring abutting against the piston II36 are provided in the buffer chamber 37, a positioning screw 41 is provided in the second oil chamber 38, and the compression spring presses the piston II36 toward the positioning screw 41 to limit the travel of the piston II36 toward the second oil chamber 38. The buffer chamber is connected to the outside and is in a normal pressure state. In this embodiment, the control components are provided at both ends of the load-bearing shaft 232, that is, the control components at both ends are symmetrically provided.

[0050] When in the lifting state, the first oil chamber 39 is pressurized (the pressurizing device can be a hydraulic pump, which is installed above the sliding platform 23), and the pressure in the second oil chamber 38 is also increased, and the piston I32 moves toward the second oil chamber 38 to contact the outer side of the front end of the positioning column 33, and the piston II36 moves to the right; with the continuous application of tension by the cable, the rotating drum 233 rotates, and the positioning column 33 is aligned with the second positioning hole; under the pressure of the second oil chamber 38, the positioning column 33 enters the second positioning hole, and under the continuous pressurization of the first oil chamber 39, the piston I32 continues to move forward and contacts the positioning surface of the positioning seat 34, then the first positioning rod 31 disengages from the first positioning hole, completing the switching from the lifting state to the lateral state.

[0051] When in the transverse state, the pressure in the first oil chamber 39 is released, and the cable continues to apply tension, so that the first positioning rod 31 will be aligned with one of the first positioning holes, and the tension spring I will push the first positioning rod 31 toward the first positioning hole; and the piston II36 is limited by the positioning screw 41, the pressure in the second oil chamber 38 is reduced, and the tension spring II will pull the positioning column 33 out of the second positioning hole, completing the switching from the transverse state to the lifting state.

[0052] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A suspension bridge construction structure based on first catwalk and then cable saddle lifting, characterized by: It includes a hoisting device arranged on the top of the tower, a displacement frame arranged on the catwalk load-bearing cables, and a catwalk board arranged near the displacement frame; the displacement frame is arranged near the top of the tower, the displacement frame is only connected to several catwalk load-bearing cables in the middle, and is in contact with the catwalk load-bearing cables at the edge, and a T-shaped slide groove is provided at the position where the displacement frame contacts the catwalk load-bearing cables at the edge; the catwalk board is detachably connected to the catwalk weighing cable in the middle, and the catwalk board is connected to the catwalk load-bearing cables at the edge through several guide rail blocks, the upper part of the guide rail block is detachably fixed to the catwalk board and the catwalk load-bearing cables at the edge, and a T-shaped slider that can be embedded in the T-shaped slide groove is provided at the lower end of the guide rail block, and several T-shaped sliders are combined into a T-shaped slide rail; the displacement frame can be moved to the bottom of the catwalk board under the drive of the hoisting device, and the displacement frame makes the T-shaped slider embedded in the T-shaped slide groove when it moves to the bottom of the catwalk board.

2. The suspension bridge construction structure based on first catwalk and then saddle lifting according to claim 1 is characterized in that: The T-shaped sliding blocks are connected with limit ropes.

3. The suspension bridge construction structure based on first catwalk and then saddle lifting according to claim 1 is characterized in that: The hoisting equipment includes a gantry installed on the top of the main tower. The gantry adopts a truss structure. A cable saddle introduction port is reserved on the front side of the gantry. Parallel slide rails are arranged on the top of both sides of the gantry. A traction system is installed at the end of the gantry. The traction system is a winch. A sliding platform is installed on the slide rail, and the sliding platform is slidably connected to the slide rail. A load-bearing shaft is fixed on the front side of the sliding platform, and a rotatable drum is arranged outside the load-bearing shaft. The cable of the traction system is wound around the drum. A cavity is provided in the bearing shaft, in which a control assembly is installed, a plurality of first positioning holes are provided on the side wall of the slide rail, and a plurality of second positioning holes are evenly distributed on the inner wall of the rotating drum along the circumferential direction; the control assembly includes a first positioning rod that can slide along the axial direction of the cavity, and the first positioning rod enters the first positioning hole to position the sliding platform; the control assembly also includes a positioning column that penetrates the side wall of the bearing shaft and can slide radially along the bearing shaft, and the positioning column enters the second positioning hole to position the rotating drum; A tension spring I is sleeved on the first positioning rod so that the first positioning rod is pushed toward the first positioning hole. A piston I is arranged at one end of the first positioning rod away from the first positioning hole. The two sides of the piston I are respectively the first oil chamber where the first positioning rod is located and the second oil chamber where the positioning column is located. When the first oil chamber is pressurized, the piston I moves toward the second oil chamber, the first positioning rod is separated from the first positioning hole, and the second oil chamber pushes the positioning column into the second positioning hole, thereby switching the positioning state of the sliding platform to the rotating drum positioning state. A tension spring II is arranged under the positioning column so that the positioning column is subjected to a force that pulls it away from the second positioning hole, thereby relieving the pressure in the first oil chamber. The tension spring I pushes the first positioning rod toward the first positioning hole, and the pressure in the second oil chamber is reduced. The tension spring II pulls the positioning column out of the second positioning hole, thereby switching the drum positioning state to the sliding platform positioning state.

4. The suspension bridge construction structure based on first catwalk and then saddle lifting according to claim 3 is characterized in that: The slide rail is in an inclined state with a higher end, and the inclination angle is 5-8 degrees.

5. The suspension bridge construction structure based on first catwalk and then saddle lifting according to claim 3 is characterized in that: A buffer chamber is provided on the side of the second oil chamber away from the first oil chamber, a piston II and a compression spring abutting against the piston II are provided in the buffer chamber, a positioning screw is provided in the second oil chamber, and the compression spring presses the piston II toward the positioning screw; a positioning seat is provided below the positioning column, the positioning seat is threadedly connected to the side wall of the load-bearing shaft, a positioning surface is provided on the positioning seat, and the positioning surface forms a stepped surface with the outer side surface of the positioning column; The piston 1 contacts the outer side surface of the positioning column, the first positioning rod is still matched with the first positioning hole, the piston 1 contacts the positioning surface of the positioning seat, and the first positioning rod is disengaged from the first positioning hole.

6. The suspension bridge construction structure based on first catwalk and then saddle lifting according to claim 5 is characterized in that: The buffer chamber maintains a normal pressure state.

7. The suspension bridge construction structure based on first catwalk and then saddle lifting according to claim 1 is characterized in that: A first wedge-shaped surface inclined downward is provided on one side of the displacement frame close to the catwalk plate, and a second wedge-shaped surface matched with the first wedge-shaped surface of the catwalk is provided on one end of the catwalk plate close to the displacement frame.

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