Hoisting, overturning and positioning device for river transportation of steel box girder sections and construction method of hoisting, overturning and positioning device

Abstract

The invention discloses a steel box girder segment river transportation hoisting, overturning and positioning device and a construction method thereof, and relates to the technical field of hoisting equipment.The steel box girder segment river transportation hoisting, overturning and positioning device comprises a crane used for hoisting a steel box girder segment; a conveying mechanism is arranged below the crane, and a positioning mechanism and a stabilizing mechanism are arranged between the crane and the conveying mechanism; the positioning mechanism comprises hanging lugs, and the hanging lugs are arranged on the conveying mechanism; the multiple third slings are arranged between the crane and the conveying mechanism; and one end of each third sling is connected with the conveying mechanism through a hanging lug. By arranging the positioning mechanism, the crane can accurately control the conveying mechanism to move by synchronously winding the plurality of third slings and keeping consistent tension, so that the steel box girder section is stably positioned under the crane, and the accurate positioning of the steel box girder section on the river surface is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting equipment, and in particular to a steel box girder segment river transportation hoisting flipping positioning device and a construction method thereof. Background Art

[0002] Steel box girders are a common structural form in long-span bridges, named for their box-like appearance. This structure is particularly suitable for bridges with large spans. During bridge construction, given the long overall length of the bridge, it is usually necessary to divide the steel box girder into multiple sections for hoisting operations.

[0003] In the prior art, Figure 1 As shown in the figure, the steel box girder segments are generally transported to the construction site by river transport and accurately positioned directly under the crane. Subsequently, using a multi-point hook system, the crane steadily lifts the steel segments and transports them to the designated construction location of the bridge deck. Once arrived, these steel segments will be precisely assembled and welded on the bridge deck to ensure that each part is firmly connected.

[0004] However, the above steel box girder segment river transportation hoisting equipment still has the following defects during use:

[0005] (1) After the steel box girder segments are transported to the site directly below the bridge deck construction site by river transport, it becomes very difficult to accurately move and position the steel box girder segments due to the large height difference. In addition, the fluidity of the river makes it difficult to maintain a stable position of the steel box girder segments on the water surface, further increasing the difficulty of positioning. This instability not only affects the accuracy and safety of the lifting work, but may also delay the construction progress, which is not conducive to the smooth progress of subsequent lifting and assembly work;

[0006] (2) Due to the large height difference between the bridge deck construction point and the lifting position, the steel box girder segment is easily affected by operational and environmental factors during the lifting process. In particular, unforeseen meteorological conditions such as sudden strong winds may cause the steel box girder segment to shake in the air. This shaking not only increases the safety risk of the operation, but also may reduce work efficiency and delay the construction progress. Summary of the invention

[0007] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a steel box girder segment river transportation hoisting flipping positioning device and its construction method, which is used to solve the problem that the existing steel box girder segment river transportation hoisting structure proposed in the above-mentioned background technology lacks a positioning structure, is prone to shaking during the hoisting process, and affects the accuracy and safety of the hoisting work.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A steel box girder segment river transportation hoisting and flipping positioning device comprises a crane for hoisting the steel box girder segment; a conveying mechanism is arranged below the crane, and a positioning mechanism and a stabilizing mechanism are arranged between the crane and the conveying mechanism; the positioning mechanism comprises:

[0010] Hanging ears, a plurality of the hanging ears are arranged on both sides of the conveying mechanism;

[0011] A third sling, wherein a plurality of the third slings are arranged between the crane and the conveying mechanism; and one end of each third sling is connected to the conveying mechanism through a hanging ear;

[0012] The stabilizing mechanism comprises: a mounting seat, the crane comprises a second sling and at least one pair of first slings; at least one pair of first slings is connected to the steel box girder segment; the second sling is connected to the steel box girder segment through the mounting seat;

[0013] A sliding sleeve, a plurality of the sliding sleeves being slidably connected to the third sling;

[0014] And positioning ropes, one end of each of the positioning ropes is connected to the mounting seat, and the other end of each sliding sleeve is respectively connected to each sliding sleeve.

[0015] Preferably, the stabilizing mechanism further comprises a first linkage mechanism, which is arranged between the second sling and the third sling; the first linkage mechanism is used to drive the third sling to be in a taut state when lifting the steel box girder segment.

[0016] Preferably, the first linkage mechanism includes a winding wheel, a block and a trigger mechanism; the winding wheel is rotatably connected to the mounting seat, a tapered hole is provided on the mounting seat, one end of the second sling is wound around the winding wheel and then passes through the tapered hole to be connected to multiple third slings, and the block is fixed at the connection position between the second sling and the multiple third slings; a torsion spring is provided at the rotational connection position between the winding wheel and the mounting seat; the trigger mechanism is used to lock or allow the winding wheel to rotate.

[0017] Preferably, the stopper is a spherical structure, and the diameter of the spherical structure is smaller than the maximum diameter of the tapered hole and larger than the minimum diameter of the tapered hole.

[0018] Preferably, the trigger mechanism includes a gear, a slider, a mounting block and a compression spring; the gear is coaxially fixed to the winding wheel, the slider is slidably connected to the mounting seat, and when the crane lifts the steel box girder segment, the movement direction of the steel box girder segment is parallel to the sliding direction of the slider; the slider is provided with a tooth groove matched with the gear; the mounting block is arranged on the slider, and the compression spring is arranged between the mounting block and the mounting seat, and when the slider loses restriction, the compression spring is used to push the tooth groove and the gear to resume meshing.

[0019] Preferably, a push rod is fixedly provided on the slider; when the steel box girder segment moves downward and approaches the conveying mechanism, the push rod is used to push the slider to move, so as to drive the tooth groove to separate from the gear.

[0020] Preferably, a buffer mechanism is provided between each of the sliding sleeves and the positioning rope; the buffer mechanism includes an airbag and a second linkage mechanism; the sliding sleeve is provided on the third sling through the airbag; the second linkage mechanism is provided between the sliding sleeve and the positioning rope; when the positioning rope is tightened, the airbag is driven to expand through the second linkage mechanism to increase the friction between the airbag and the positioning rope.

[0021] Preferably, the second linkage mechanism includes a piston cylinder, a piston, a piston rod and a ventilation pipe; the piston cylinder is arranged in a sliding sleeve, a first ventilation hole is opened between the piston cylinder and the sliding sleeve, and the piston cylinder is connected to the airbag through the first ventilation hole; the piston is slidably connected in the piston cylinder, and the piston is connected to the positioning rope through the piston rod; a mounting ring with a through hole is arranged between the piston cylinder and the sliding sleeve.

[0022] Preferably, the conveying mechanism includes a mounting plate, a floating block and a mounting frame; the mounting plate floats on the river surface through the floating block; the mounting frame is fixed to the mounting plate; the steel box girder segment is placed on the mounting frame; and a plurality of the hanging ears are fixed to the mounting plate.

[0023] A construction method for a steel box girder segment river transportation hoisting and flipping positioning device comprises the following steps:

[0024] Step 1: Positioning on the river surface: After the steel box girder segment is moved to the bottom of the crane by the conveying mechanism, firstly, a plurality of third slings are connected to the conveying mechanism through the hanging ears, and then the third slings are driven to be reeled by the crane, so that the plurality of third slings are tightened with the same tightening force;

[0025] Step 2: Lifting and positioning: First, connect the first sling and the second sling to the opposite sides of the steel box girder segment respectively, then use the crane to reel in the first sling to flip the steel box girder segment 90° to a vertical state, and use the second sling to lift the steel box girder segment in a vertical state; at this time, the flipping of the steel box girder segment will drive the positioning rope and the third sling to tighten, so that the positioning rope remains taut when lifting the steel box girder segment.

[0026] Beneficial effects of the present invention:

[0027] 1. By setting up a positioning mechanism and synchronously winding up multiple third slings and maintaining consistent tension, the crane can accurately control the movement of the conveying mechanism so that the steel box girder segment is stably positioned directly below the crane, thereby achieving accurate positioning of the steel box girder segment on the river surface;

[0028] 2. By setting up a stabilizing mechanism, when the steel box girder segment is hoisted upward, multiple positioning ropes and the third sling are tightened. Through the action of the sliding sleeve, the positioning rope can rise synchronously with the steel box girder segment in a tightened state. In this way, when encountering wind forces from different directions, the tightened positioning rope can effectively maintain the stability of the steel box girder segment, ensuring the safety and stability of the hoisting operation;

[0029] 3. By setting a trigger mechanism, when the second sling is installed, the third sling is in a relaxed state, which is convenient for the installation of the second sling. During the hoisting, the third sling can be automatically triggered to be tightened, so that when the steel box girder segment is hoisted upward, the tightened positioning rope can effectively maintain the stability of the steel box girder segment, thereby improving the convenience of use;

[0030] 4. By setting up a buffer mechanism, when the third sling is subjected to excessive tension, the airbag is inflated through the stabilizing mechanism and the second linkage mechanism to offset part of the tension and increase the friction between the third sling and the third sling. This not only prevents the third sling from being subjected to excessive force, but also reduces the shaking amplitude of the steel box girder segment and the conveying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of the river transportation and hoisting status of the steel box girder segment;

[0033] Figure 2 It is a schematic diagram of a three-dimensional magnified structure of the conveying mechanism of the present invention from a first viewing angle;

[0034] Figure 3 It is a schematic diagram of a three-dimensional enlarged structure of the conveying mechanism of the present invention from a second viewing angle;

[0035] Figure 4 The present invention Figure 3 A schematic diagram of the enlarged structure of the middle A area;

[0036] Figure 5 It is a three-dimensional enlarged structural schematic diagram of the steel box girder segment of the present invention in the hoisting state after flipping;

[0037] Figure 6 The present invention Figure 5 Schematic diagram of the enlarged structure of the middle B area;

[0038] Figure 7 It is a partially cutaway three-dimensional enlarged structural schematic diagram of the stabilizing mechanism of the present invention;

[0039] Figure 8 It is a schematic diagram of a three-dimensional enlarged exploded structure of the stabilizing mechanism of the present invention;

[0040] Fig. 9 It is a schematic diagram of a three-dimensional enlarged structure of the sliding sleeve of the present invention;

[0041] Fig.10 It is a partially cutaway three-dimensional enlarged structural schematic diagram of the buffer mechanism of the present invention;

[0042] Fig.11 It is a flow chart of the method of the present invention.

[0043] In the figure: 1. crane; 11. first sling; 12. second sling; 2. steel box girder segment; 3. conveying mechanism; 31. mounting plate; 32. floating block; 33. mounting frame; 4. positioning mechanism; 41. hanging ear; 42. third sling; 5. stabilizing mechanism; 51. mounting seat; 52. positioning rope; 53. sliding sleeve; 54. first linkage mechanism; 541. winding wheel; 542. stopper; 543. tapered hole; 544. trigger mechanism; 5441. gear; 5442. slider; 5443. tooth groove; 5444. mounting block; 5445. compression spring; 5446. push rod; 545. buffer mechanism; 5451. airbag; 5452. piston cylinder; 5453. piston; 5454. piston rod; 5455. vent pipe; 5456. first vent hole; 5457. mounting ring. DETAILED DESCRIPTION

[0044] 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.

[0045] like Figures 1 to 10 As shown, a steel box girder segment river transportation hoisting flip positioning device, such as Figures 2 to 5As shown, it includes a crane 1 for hoisting a steel box girder segment 2; it can be understood that the crane 1 is a prior art and will not be described in detail; a conveying mechanism 3 is arranged below the crane 1, and a positioning mechanism 4 and a stabilizing mechanism 5 are arranged between the crane 1 and the conveying mechanism 3; the positioning mechanism 4 includes: a hanging ear 41, a plurality of hanging ears 41 are arranged on the conveying mechanism 3; a third sling 42, a plurality of third slings 42 are arranged between the crane 1 and the conveying mechanism 3; and one end of each third sling 42 is connected to the conveying mechanism 3 through the hanging ear 41; the stabilizing mechanism 5 includes: a mounting seat 51, the crane 1 includes a second sling 12 and at least a pair of first slings 11; to At least one pair of first slings 11 are connected to the steel box girder segment 2; the second sling 12 is connected to the steel box girder segment 2 through the mounting seat 51; an electromagnet is installed on the mounting seat 51, the electromagnet is a prior art and is not shown in the figure, the mounting seat 51 is adsorbed with the steel box girder segment 2 through the electromagnet to cooperate in lifting the steel box girder segment 2, and after the lifting is completed, the mounting seat 51 can be controlled by the electromagnet to disconnect from the steel box girder segment 2, so as to facilitate disassembly and assembly; a sliding sleeve 53, a plurality of sliding sleeves 53 are slidably connected to the third sling 42; and a positioning rope 52, one end of each of the plurality of positioning ropes 52 is connected to the mounting seat 51, and the other end of each sliding sleeve 53 is respectively connected to each sliding sleeve 53.

[0046] It should be noted that the connection points between the plurality of third slings 42 and the conveying mechanism 3 form a rectangle, so that when the plurality of third slings 42 are synchronously tightened, the conveying mechanism 3 can be moved to the position directly below the crane 1; that is, when the plurality of third slings 42 are wound up by the crane 1, the plurality of third slings 42 are controlled to maintain the same tension, which will drive the conveying mechanism 3 to move on the river surface, so that the steel box girder segment 2 on the conveying mechanism 3 is moved to the position directly below the crane 1, thereby achieving the purpose of positioning the steel box girder segment 2 on the river surface; and when the crane 1 winds up the first sling 11 and the second sling 12 to flip and lift the steel box girder segment 2, the steel box girder can be driven during the lifting process The segment 2 flips over and can drive the steel box girder segment 2 to maintain the flipped state and be hoisted upward. During the process of hoisting the steel box girder segment 2 upward, the stabilizing mechanism 5 can keep the steel box girder segment 2 in a stable state, reducing the problem of shaking caused by wind and the like. Specifically, when the steel box girder segment 2 is hoisted upward, it can drive multiple positioning ropes 52 and the third sling 42 to be tightened. Through the setting of the sliding sleeve 53, the positioning rope 52 can be driven to maintain a tightened state and rise with the rise of the steel box girder segment 2. Therefore, when the steel box girder segment 2 is subjected to wind forces in different directions, the positioning rope 52 is in a tightened state, which can ensure that the steel box girder segment 2 is in a stable state, thereby ensuring the stability of the hoisting and improving work safety.

[0047] like Figures 1 to 5As shown, the stabilizing mechanism 5 also includes a first linkage mechanism 54, which is arranged between the second sling 12 and the third sling 42; the first linkage mechanism 54 is used to drive the third sling 42 to be in a taut state when lifting the steel box girder segment 2; the first linkage mechanism 54 includes a winding wheel 541, a stopper 542 and a trigger mechanism 544; the winding wheel 541 is rotatably connected to the mounting seat 51, and a tapered hole 543 is opened on the mounting seat 51. One end of the second sling 12 is wound around the winding wheel 541 and then passes through the tapered hole 543 to connect with multiple third slings 42, and the stopper 542 is fixed at the connection position between the second sling 12 and the multiple third slings 42; the stopper 542 is a spherical structure, and the diameter of the spherical structure is smaller than the maximum diameter of the tapered hole 543 and larger than the minimum diameter of the tapered hole 543; a torsion spring is arranged at the rotation connection position between the winding wheel 541 and the mounting seat 51; the trigger mechanism 544 is used to lock or allow the winding wheel 541 to rotate.

[0048] It should be noted that, in order to facilitate the connection between the second sling 12 and the steel box girder segment 2 before lifting, the third sling 42 is made in a relaxed state before lifting the steel box girder segment 2, which does not affect the connection between the second sling 12 and the steel box girder segment 2, and when the steel box girder segment 2 is lifted upward, the third sling 42 can be automatically tightened to ensure the lifting stability of the steel box girder segment 2; specifically, in the process of the crane 1 winding up the first sling 11 and the second sling 12 to flip the steel box girder segment 2, as the second sling 12 is wound up, the winding wheel 541 is driven to rotate, and the winding wheel 541 drives the multiple third slings 42 on the stopper 542 to move until the stopper 542 contacts the tapered hole 543, at which time the second sling 12 and the third sling 42 are both in a taut state; the steel box girder segment 2 is stably lifted and lifted by the taut third sling 42;

[0049] In order to ensure that the third sling 42 is in a straightened state after the steel box girder segment 2 is turned over, and the turning of the steel box girder segment 2 is controllable to reduce shaking, a trigger mechanism 544 is provided, so that the third sling 42 is triggered to be tightened only after the steel box girder segment 2 is completely turned over, that is, the axis of the tightened first sling 11 coincides with the center of gravity of the steel box girder segment 2. At this time, when the second sling 12 is in a relaxed state, part of the steel box girder segment 2 shakes excessively; therefore, after the steel box girder segment 2 is completely turned over, the crane 1 controls the second sling 12 to be in a relaxed state, and then triggers the third sling 42 to be tightened. The trigger mechanism 544 triggers the winding wheel 541 to reel in, so that the winding wheel 541 drives the second sling 12 and multiple third slings 42 to reel in synchronously until the block 542 contacts the tapered hole 543. At this time, the third sling 42 is in a taut state. At the same time, the trigger mechanism 544 restores the rotation restriction on the winding wheel 541, and tightens the second sling 12 through the crane 1. Then, the first sling 11, the second sling 12 and the multiple third slings 42 cooperate to synchronously control the lifting of the steel box girder segment 2 to ensure the stability of the lifting process of the steel box girder segment 2.

[0050] like Figures 5 to 8 As shown, the trigger mechanism 544 includes a gear 5441, a slider 5442, a mounting block 5444 and a compression spring 5445; the gear 5441 is coaxially fixed to the winding wheel 541, the slider 5442 is slidably connected to the mounting seat 51, and when the crane 1 lifts the steel box girder segment 2, the movement direction of the steel box girder segment 2 is parallel to the sliding direction of the slider 5442; the slider 5442 is provided with a tooth groove 5443 adapted to the gear 5441; the mounting block 5444 Arranged on the slider 5442, the compression spring 5445 is arranged between the mounting block 5444 and the mounting seat 51. When the slider 5442 loses its restriction, the compression spring 5445 is used to push the tooth groove 5443 and the gear 5441 to resume engagement. A push rod 5446 is fixed on the slider 5442. When the steel box girder segment 2 moves downward and approaches the conveying mechanism 3, the push rod 5446 is used to push the slider 5442 to move, so as to drive the tooth groove 5443 to separate from the gear 5441.

[0051] It should be noted that, when the crane 1 controls the crane 1 to flip over by the first sling 11, the second sling 12 is firstly relaxed by the crane 1, and then the steel box girder segment 2 is driven to descend by the crane 1, driving the push rod 5446 to contact with the conveying mechanism 3. As the steel box girder segment 2 continues to descend, the push rod 5446 is pushed to move, and the slider 5442 is driven to move by the push rod 5446, so that the compression spring 5445 is stretched, and at the same time, the tooth groove 5443 is driven to separate from the gear 5441, and the restriction on the winding wheel 541 is released. At this time, the winding wheel 541 is driven to rotate by the torsion spring, so that the winding wheel 541 simultaneously winds up the second sling 12 and the third sling 42, with The stopper 542 between the second sling 12 and the third sling 42 is moved until the stopper 542 contacts the tapered hole 543, and the third sling 42 is in a taut state. At this time, the steel box girder segment 2 is driven to rise by the crane 1, so that the push rod 5446 is separated from the conveying mechanism 3, so that the compression spring 5445 drives the push rod 5446 to reset, and then drives the tooth groove 5443 to engage with the gear 5441, that is, the restriction on the winding wheel 541 is restored. Then, the second sling 12 is restored to a taut state by the crane 1. While maintaining the first sling 11, the second sling 12 and the third sling 42 in a taut state, the steel box girder segment 2 is hoisted by the crane 1 to achieve stable hoisting of the steel box girder segment 2.

[0052] like Figures 1 to 3 and Figures 9 and 10 As shown, a buffer mechanism 545 is provided between each sliding sleeve 53 and the positioning rope 52; the buffer mechanism 545 includes an airbag 5451 and a second linkage mechanism; it can be understood that the airbag 5451 is a prior art, and the airbag 5451 is an elastic structure, and the inflated airbag 5451 can automatically recover after losing its restriction; the sliding sleeve 53 is sleeved on the third sling 42 through the airbag 5451; the second linkage mechanism is provided between the sliding sleeve 53 and the positioning rope 52; when the positioning rope 52 is tightened, the airbag 5451 is driven to expand through the second linkage mechanism to increase the friction between the airbag 5451 and the positioning rope 52.

[0053] It should be noted that when the steel box girder segment 2 is subjected to excessive wind force, in order to prevent the third sling 42 from being broken due to excessive force or the third sling 42 from being subjected to excessive force, driving the third sling 42 to move, causing the conveying mechanism 3 floating on the river surface to move and affect the lifting, it is too difficult to set a buffer mechanism 545, so that when the third sling 42 is subjected to excessive tension, a certain buffer is formed to prevent the third sling 42 from being subjected to excessive force and reduce the shaking amplitude of the steel box girder segment 2 and the conveying mechanism 3; specifically: when the third sling 42 is pulled by force, the airbag 5451 is made to It expands under force and can offset part of the tension on the third sling 42 to ensure the hoisting stability of the crane 1. The inflated airbag 5451 can increase the friction between the airbag 5451 and the third sling 42. At this time, the hoisting work can be stopped to maintain the steel box girder segment 2 at a certain height. At this time, the friction between the airbag 5451 and the third sling 42 can offset the influence of the wind on the steel box girder segment 2 until the wind weakens and the friction between the airbag 5451 and the third sling 42 is reduced. Then the hoisting work can be resumed to further reduce the shaking of the steel box girder segment 2 during the hoisting process.

[0054] like Figures 9 and 10 As shown, it can be understood that the present application does not limit the specific structure and installation method of the second linkage mechanism, and only a feasible technical solution is provided below; the second linkage mechanism includes a piston cylinder 5452, a piston 5453, a piston rod 5454 and a ventilation pipe 5455; the piston cylinder 5452 is arranged in the sliding sleeve 53, and a first ventilation hole 5456 is provided between the piston cylinder 5452 and the sliding sleeve 53, and the piston cylinder 5452 is connected to the airbag 5451 through the first ventilation hole 5456; the piston 5453 is slidably connected in the piston cylinder 5452, and the piston 5453 is connected to the positioning rope 52 through the piston rod 5454; a mounting ring 5457 with a through hole is provided between the piston cylinder 5452 and the sliding sleeve 53.

[0055] It should be noted that when the third sling 42 is pulled by force, the piston 5453 is driven to move by the piston rod 5454, and the air in the piston cylinder 5452 is squeezed by the piston 5453, so that the air in the piston cylinder 5452 flows into the airbag 5451 through the first air vent 5456, thereby causing the airbag 5451 to expand under force. At this time, a part of the pulling force on the third sling 42 can be offset, thereby ensuring the lifting stability of the crane 1.

[0056] like Figures 2 to 3As shown, it can be understood that the present application does not limit the specific structure and installation method of the conveying mechanism 3, and only a feasible technical solution is provided below; the conveying mechanism 3 includes a mounting plate 31, a floating block 32 and a mounting frame 33; the mounting plate 31 floats on the river surface through the floating block 32; the mounting frame 33 is fixed to the mounting plate 31; the steel box girder segment 2 is placed on the mounting frame 33; a plurality of hanging ears 41 are fixed to the mounting plate 31; when a plurality of third slings 42 are tightened by the crane 1, the mounting plate 31 can be driven to move until the plurality of third slings 42 are subjected to the same force and tension, at which time the steel box girder segment 2 on the mounting frame 33 can be moved to the bottom of the crane 1; it can be understood that in order to ensure that the third slings 42 are subjected to the same force and tension, a tension sensor can be installed between the third sling 42 and the crane 1 to detect the tension applied to the third sling 42; the tension sensor is a prior art and will not be described in detail.

[0057] like Figures 1 to 11 As shown, a construction method of a steel box girder segment river transportation hoisting and flipping positioning device comprises the following steps:

[0058] Step 1: Positioning on the river surface: After the steel box girder segment 2 is moved to the bottom of the crane 1 by the conveying mechanism 3, the plurality of third slings 42 are first connected to the conveying mechanism 3 through the hanging ears 41, and then the third slings 42 are driven to be rolled up by the crane 1, so that the plurality of third slings 42 are tightened with the same tightening force;

[0059] Step 2, lifting and positioning: first, respectively connect the first sling 11 and the second sling 12 to the two opposite sides of the steel box girder segment 2, and then use the crane 1 to reel in the first sling 11 to flip the steel box girder segment 2 90° to a vertical state, and through the cooperation of the second sling 12, the steel box girder segment 2 is lifted in a vertical state; at this time, the flipping of the steel box girder segment 2 will drive the positioning rope 52 and the third sling 42 to be tightened, so that the positioning rope 52 remains in a tightened state when the steel box girder segment 2 is lifted.

[0060] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A steel box girder segment river transport hoisting and flipping positioning device, comprising a crane (1) for hoisting a steel box girder segment (2); characterized in that: A conveying mechanism (3) is arranged below the crane (1), and a positioning mechanism (4) and a stabilizing mechanism (5) for maintaining stable lifting of the steel box girder segment (2) are arranged between the crane (1) and the conveying mechanism (3); the positioning mechanism (4) comprises: A hanging lug (41), wherein a plurality of the hanging lugs (41) are arranged on the conveying mechanism (3); and a third sling (42), wherein a plurality of the third slings (42) are arranged between the crane (1) and the conveying mechanism (3); and one end of each third sling (42) is connected to the conveying mechanism (3) via a hanging ear (41).

2. The steel box girder segment river transportation hoisting and flipping positioning device according to claim 1 is characterized in that: The stabilizing mechanism (5) comprises: a mounting seat (51); the crane (1) comprises a second sling (12) and at least one pair of first slings (11); the at least one pair of first slings (11) is connected to the steel box girder segment (2); the second sling (12) is connected to the steel box girder segment (2) via the mounting seat (51); A sliding sleeve (53), wherein a plurality of the sliding sleeves (53) are slidably connected to the third sling (42); And positioning ropes (52), one end of each of the positioning ropes (52) is connected to the mounting seat (51), and the other end of each sliding sleeve (53) is connected to each sliding sleeve (53) respectively.

3. The steel box girder segment river transportation hoisting and flipping positioning device according to claim 2 is characterized in that: The stabilizing mechanism (5) further comprises a first linkage mechanism (54), wherein the first linkage mechanism (54) is arranged between the second sling (12) and the third sling (42); the first linkage mechanism (54) is used to drive the third sling (42) to be in a taut state when lifting the steel box girder segment (2).

4. The steel box girder segment river transportation hoisting and flipping positioning device according to claim 3 is characterized in that: The first linkage mechanism (54) comprises a winding wheel (541), a stopper (542) and a trigger mechanism (544); the winding wheel (541) is rotatably connected to the mounting seat (51), a conical hole (543) is provided on the mounting seat (51), one end of the second sling (12) is wound around the winding wheel (541) and then passes through the conical hole (543) to be connected with a plurality of third slings (42), and the stopper (542) is fixed at the connection position between the second sling (12) and the plurality of third slings (42); a torsion spring is provided at the rotation connection position between the winding wheel (541) and the mounting seat (51); the trigger mechanism (544) is used to lock or allow the winding wheel (541) to rotate.

5. The steel box girder segment river transportation hoisting and flipping positioning device according to claim 4 is characterized in that: The stopper (542) is a spherical structure, and the diameter of the spherical structure is smaller than the maximum diameter of the tapered hole (543) and larger than the minimum diameter of the tapered hole (543).

6. The steel box girder segment river transportation hoisting and flipping positioning device according to claim 4 is characterized in that: The trigger mechanism (544) comprises a gear (5441), a slider (5442), a mounting block (5444) and a compression spring (5445); the gear (5441) is coaxially fixed to the winding wheel (541), the slider (5442) is slidably connected to the mounting seat (51), and when the crane (1) lifts the steel box girder segment (2), the movement direction of the steel box girder segment (2) is parallel to the sliding direction of the slider (5442); a tooth groove (5443) adapted to the gear (5441) is provided on the slider (5442); the mounting block (5444) is provided on the slider (5442), the compression spring (5445) is provided between the mounting block (5444) and the mounting seat (51), and when the slider (5442) loses its restriction, the compression spring (5445) is used to push the tooth groove (5443) to resume meshing with the gear (5441).

7. The steel box girder segment river transportation hoisting and flipping positioning device according to claim 6 is characterized in that: A push rod (5446) is fixedly provided on the slider (5442); when the steel box girder segment (2) moves downward and approaches the conveying mechanism (3), the push rod (5446) is used to push the slider (5442) to move, so as to drive the tooth groove (5443) to separate from the gear (5441).

8. The steel box girder segment river transportation hoisting and flipping positioning device according to claim 2 is characterized in that: A buffer mechanism (545) is provided between each of the sliding sleeves (53) and the positioning rope (52); the buffer mechanism (545) comprises an airbag (5451) and a second linkage mechanism; the sliding sleeve (53) is sleeved on the third sling (42) through the airbag (5451); the second linkage mechanism is provided between the sliding sleeve (53) and the positioning rope (52); when the positioning rope (52) is tightened, the airbag (5451) is driven to expand through the second linkage mechanism to increase the friction between the airbag (5451) and the positioning rope (52).

9. The steel box girder segment river transportation hoisting and flipping positioning device according to claim 8 is characterized in that: The second linkage mechanism includes a piston cylinder (5452), a piston (5453), a piston rod (5454) and a ventilation pipe (5455); the piston cylinder (5452) is arranged in the sliding sleeve (53), a first ventilation hole (5456) is opened between the piston cylinder (5452) and the sliding sleeve (53), and the piston cylinder (5452) is connected to the airbag (5451) through the first ventilation hole (5456); the piston (5453) is slidably connected in the piston cylinder (5452), and the piston (5453) is connected to the positioning rope (52) through the piston rod (5454); a mounting ring (5457) with a through hole is arranged between the piston cylinder (5452) and the sliding sleeve (53).

10. A construction method for a steel box girder segment river transportation hoisting and flipping positioning device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Positioning on the river surface: After the steel box girder segment (2) is moved to the bottom of the crane (1) by the conveying mechanism (3), the plurality of third slings (42) are first connected to the conveying mechanism (3) through the hanging ears (41), and then the third slings (42) are driven to be reeled up by the crane (1), so that the plurality of third slings (42) are tightened with the same tightening force; Step 2: Lifting and positioning: First, respectively connect the first sling (11) and the second sling (12) to the two opposite sides of the steel box girder segment (2), then use the crane (1) to reel in the first sling (11) so that the steel box girder segment (2) is flipped 90° to a vertical state, and through the cooperation of the second sling (12), the steel box girder segment (2) is lifted in a vertical state; at this time, the steel box girder segment (2) and the third sling (42) are maintained in a taut state through the stabilizing mechanism (5).

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