River transportation, hoisting, overturning and positioning device for steel box girder section and construction method thereof

Abstract

The application discloses a steel box girder section river transportation hoisting overturning positioning device and a construction method thereof, relates to the technical field of hoisting equipment, and comprises a crane used for hoisting a steel box girder section; a conveying mechanism is arranged below the crane; a positioning mechanism and a stabilizing mechanism are arranged between the crane and the conveying mechanism; the positioning mechanism comprises: lug ears, a plurality of lug ears are arranged on the conveying mechanism; third slings, a plurality of 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 lug ear. Through the positioning mechanism, the crane can accurately control the movement of the conveying mechanism by synchronously winding the plurality of third slings and keeping consistent tension, so that the steel box girder section is stably positioned directly below the crane, and thus the accurate positioning of the steel box girder section on a river surface is realized.

Description

Technical Field

[0001] This invention relates to the field of hoisting equipment technology, specifically to a steel box girder segment hoisting and tilting positioning device and its construction method for river transport. Background Technology

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

[0003] In existing technologies, such as Figure 1 As shown, steel box girder segments are typically transported to the construction site via river transport and precisely positioned directly beneath the crane. Subsequently, using a multi-point hook system, the crane smoothly lifts the steel segments and transports them to the designated construction location on the bridge deck. Upon arrival, these steel segments are precisely assembled and welded on the bridge deck to ensure a secure connection between all parts.

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

[0005] (1) After transporting the steel box girder segments to the area directly below the bridge deck construction site via river transport, the significant height difference makes precise movement and positioning of the segments extremely difficult. Furthermore, the river's fluidity makes it difficult to maintain the stable position of the segments on the water surface, further increasing the positioning challenge. This instability not only affects the accuracy and safety of the hoisting work but may also delay the construction progress, hindering the smooth progress of subsequent hoisting and assembly work.

[0006] (2) Due to the significant height difference between the bridge deck construction point and the lifting position, the steel box girder segments are easily affected by operational and environmental factors during the lifting process. In particular, unpredictable weather conditions such as sudden strong winds may cause the steel box girder segments to sway in the air. This swaying not only increases the safety risks of the operation but may also 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 this invention is to provide a steel box girder segment river transport hoisting and flipping positioning device and its construction method, so as to solve the problem that the existing steel box girder segment river transport hoisting structure lacks a positioning structure, is prone to shaking during hoisting, and affects the accuracy and safety of hoisting work.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A steel box girder segment hoisting, tilting, and positioning device for river transport includes 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 includes:

[0010] Hanging ears, multiple hanging ears are disposed on both sides of the conveying mechanism;

[0011] The third sling, and multiple third slings are disposed between the crane and the conveying mechanism; and one end of each third sling is connected to the conveying mechanism via a lug.

[0012] The stabilizing mechanism includes: a mounting base; the crane includes a second sling and at least one pair of first slings; the at least one pair of first slings are connected to a steel box girder segment; the second sling is connected to the steel box girder segment via the mounting base;

[0013] Sliding sleeves, a plurality of said sliding sleeves being slidably connected to a third sling;

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

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

[0016] Preferably, the first linkage mechanism includes a winding wheel, a stop block, and a triggering mechanism; the winding wheel is rotatably connected to the mounting base, the mounting base has a conical hole, one end of the second sling is wound around the winding wheel and passes through the conical hole to connect with multiple third slings, and the stop block is fixed at the connection position between the second sling and the multiple third slings; a torsion spring is provided at the rotatable connection position between the winding wheel and the mounting base; the triggering mechanism is used to lock or allow the winding wheel to rotate.

[0017] Preferably, the stop block is a spherical structure, the diameter of which is smaller than the maximum diameter of the conical hole and larger than the minimum diameter of the conical hole.

[0018] Preferably, the triggering mechanism includes a gear, a slider, a mounting block, and a compression spring; the gear is coaxially fixed to the winding reel, the slider is slidably connected to the mounting base, 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 adapted to the gear; the mounting block is disposed on the slider, and the compression spring is disposed between the mounting block and the mounting base, and when the slider is unrestrained, the compression spring is used to push the tooth groove and the gear to re-engage.

[0019] Preferably, a push rod is fixed 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 and gear to separate.

[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 fitted onto 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 tensioned, the airbag is inflated 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 vent pipe; the piston cylinder is disposed inside a sliding sleeve, a first vent hole is provided between the piston cylinder and the sliding sleeve, and the piston cylinder is connected to the airbag through the first vent hole; the piston is slidably connected inside the piston cylinder, and the piston is connected to a positioning rope through the piston rod; an mounting ring with a through hole is provided between the piston cylinder and the sliding sleeve.

[0022] Preferably, the conveying mechanism includes an installation plate, a float, and an installation frame; the installation plate floats on the river surface via the float; the installation frame is fixed to the installation plate; the steel box girder segment is placed on the installation frame; and multiple hanging lugs are fixed to the installation plate.

[0023] A construction method for a steel box girder segment hoisting and tilting positioning device for river transport includes the following steps:

[0024] Step 1, River Surface Positioning: After the steel box girder segment is moved to the bottom of the crane by the conveying mechanism, the multiple third slings are first connected to the conveying mechanism through the lugs. Then, the crane drives the third slings to rewind, so that the multiple third slings are taut with the same tension.

[0025] Step 2, Lifting and Positioning: First, connect the first and second slings to the opposite sides of the steel box girder segment. Then, use a crane to wind up the first sling, causing the steel box girder segment to rotate 90° to a vertical position. With the help of the second sling, the steel box girder segment is lifted while remaining vertical. At this time, the rotation of the steel box girder segment will cause the positioning rope and the third sling to tighten, ensuring that the positioning rope remains taut when lifting the steel box girder segment.

[0026] The beneficial effects of this invention are:

[0027] 1. By setting up a positioning mechanism and simultaneously winding multiple third slings with consistent tension, the crane can precisely control the movement of the conveying mechanism, so that the steel box girder segments are stably positioned directly below the crane, thereby achieving precise positioning of the steel box girder segments on the river surface.

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

[0029] 3. By setting a triggering mechanism, the third sling is in a slack state when the second sling is installed, which facilitates the installation of the second sling. During hoisting, the third sling can be automatically triggered to tighten, so that when the steel box girder segment is lifted upward, the tightened positioning rope can effectively maintain the stability of the steel box girder segment and improve the convenience of use.

[0030] 4. By incorporating a buffer mechanism, when the third sling is subjected to excessive tension, the airbag inflates through the stabilizing mechanism and the second linkage mechanism to offset part of the tension, while simultaneously increasing the friction between the airbag and the third sling. This not only prevents excessive stress on the third sling but also reduces the sway amplitude of the steel box girder segments and the conveying mechanism. Attached Figure Description

[0031] The invention will now be further described with reference to the accompanying drawings.

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

[0033] Figure 2 This is a first-view, three-dimensional magnified structural diagram of the conveying mechanism of the present invention;

[0034] Figure 3 This is a second-view, three-dimensional magnified structural diagram of the conveying mechanism of the present invention;

[0035] Figure 4 This is the present invention. Figure 3 Enlarged structural diagram of region A in the middle;

[0036] Figure 5 This is a three-dimensional enlarged structural diagram of the steel box girder segment after it has been flipped and is being lifted.

[0037] Figure 6 This is the present invention. Figure 5 Enlarged structural diagram of region B in the middle;

[0038] Figure 7 This is a partially cross-sectional, enlarged three-dimensional structural diagram of the stabilizing mechanism of the present invention;

[0039] Figure 8 This is a three-dimensional magnified exploded view of the stabilizing mechanism of the present invention;

[0040] Figure 9 This is a three-dimensional enlarged structural schematic diagram of the sliding sleeve of the present invention;

[0041] Figure 10 This is a partially cross-sectional, three-dimensional enlarged structural diagram of the buffer mechanism of the present invention;

[0042] Figure 11 This is a flowchart of the method of the present invention.

[0043] In the diagram: 1. Crane; 11. First sling; 12. Second sling; 2. Steel box girder segment; 3. Conveying mechanism; 31. Mounting plate; 32. Float; 33. Mounting frame; 4. Positioning mechanism; 41. Lug; 42. Third sling; 5. Stabilizing mechanism; 51. Mounting seat; 52. Positioning rope; 53. Sliding sleeve; 54. First linkage mechanism; 541. Winding reel; 542. Stop block; 543. Tapered hole; 544. Triggering 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; 5457. Mounting ring. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] like Figures 1 to 10 As shown, a steel box girder segment lifting, turning, and positioning device for river transport is described, such as... Figures 2 to 5As shown, the system includes a crane 1 for hoisting steel box girder segments 2; it is understood that the crane 1 is prior art and will not be described in detail; a conveying mechanism 3 is provided below the crane 1, and a positioning mechanism 4 and a stabilizing mechanism 5 are provided between the crane 1 and the conveying mechanism 3; the positioning mechanism 4 includes: a lug 41, multiple lugs 41 are provided on the conveying mechanism 3; a third sling 42, multiple third slings 42 are provided 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 a lug 41; the stabilizing mechanism 5 includes: a mounting base 51, and the crane 1 includes a second sling 12 and at least one pair of first slings 11; to 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 via mounting base 51; an electromagnet is installed on the mounting base 51, which is existing technology and is not shown in the figure. The mounting base 51 is attracted to the steel box girder segment 2 by the electromagnet to achieve the lifting of the steel box girder segment 2. After the lifting is completed, the connection between the mounting base 51 and the steel box girder segment 2 can be disconnected by the electromagnet for easy disassembly and assembly; multiple sliding sleeves 53 are slidably connected to the third sling 42; and positioning ropes 52 are provided, one end of which is connected to the mounting base 51, and the other end of each sliding sleeve 53 is connected to each other.

[0046] It should be noted that the connection points between the multiple third slings 42 and the conveying mechanism 3 form a rectangle, so that when the multiple third slings 42 are simultaneously tightened, the conveying mechanism 3 can move directly below the crane 1. That is, when the crane 1 winds up the multiple third slings 42, by controlling the multiple third slings 42 to maintain the same tension, the conveying mechanism 3 will move on the river surface, causing the steel box girder segment 2 on the conveying mechanism 3 to move directly below the crane 1, thus achieving the purpose of positioning the steel box girder segment 2 on the river surface. 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 segment 2 can be moved during the lifting process. Segment 2 is flipped, and the steel box girder segment 2 can be kept in a flipped state for upward hoisting. During the upward hoisting process, the stabilizing mechanism 5 can keep the steel box girder segment 2 stable, reducing the problem of swaying caused by wind and other factors. Specifically, when the steel box girder segment 2 is hoisted upward, multiple positioning ropes 52 and the third sling 42 can be tightened. Through the setting of the sliding sleeve 53, the positioning ropes 52 can be kept taut and rise with the steel box girder segment 2. Therefore, when the steel box girder segment 2 is subjected to wind forces from different directions, the positioning ropes 52 are kept taut, which can ensure the stability of the steel box girder segment 2, ensure the stability of hoisting, and improve the safety of the operation.

[0047] like Figures 1 to 5As shown, the stabilizing mechanism 5 also includes a first linkage mechanism 54, which is located between the second sling 12 and the third sling 42. The first linkage mechanism 54 is used to keep the third sling 42 taut when lifting the steel box girder segment 2. The first linkage mechanism 54 includes a winding wheel 541, a stop block 542, and a triggering mechanism 544. The winding wheel 541 is rotatably connected to the mounting base 51, and the mounting base 51 has a conical hole 543. One end of the second sling 12 is wound around the winding wheel 541 and passes through the conical hole 543 to connect with multiple third slings 42. The stop block 542 is fixed at the connection position between the second sling 12 and multiple third slings 42. The stop block 542 has a spherical structure, and the diameter of the spherical structure is smaller than the maximum diameter of the conical hole 543 and larger than the minimum diameter of the conical hole 543. A torsion spring is provided at the rotatable connection position between the winding wheel 541 and the mounting base 51. The triggering mechanism 544 is used to lock or allow the winding wheel 541 to rotate.

[0048] It should be noted that, to facilitate the connection between the second sling 12 and the steel box girder segment 2 before lifting, the third sling 42 is kept in a slack state before lifting the steel box girder segment 2. This does not affect the connection between the second sling 12 and the steel box girder segment 2. When lifting the steel box girder segment 2 upwards, the third sling 42 can be automatically tightened to ensure the stability of the lifting of the steel box girder segment 2. Specifically, during the process of the crane 1 winding the first sling 11 and the second sling 12 to rotate the steel box girder segment 2, as the second sling 12 is wound, the winding wheel 541 is driven to rotate. The winding wheel 541 drives the multiple third slings 42 on the stop block 542 to move until the stop block 542 abuts against the cone hole 543. At this time, both the second sling 12 and the third sling 42 are in a taut state. The taut third sling 42 allows the steel box girder segment 2 to be lifted and raised stably.

[0049] To ensure that the third sling 42 remains taut after the steel box girder segment 2 is flipped, and that the flipping of the steel box girder segment 2 is controllable to reduce swaying, a triggering mechanism 544 is installed. This mechanism ensures that the third sling 42 is only tightened after the steel box girder segment 2 has been completely flipped, meaning the axis of the taut first sling 11 coincides with the center of gravity of the steel box girder segment 2. At this point, when the second sling 12 is slack, the steel box girder segment 2 will experience excessive swaying. Therefore, after the steel box girder segment 2 has been completely flipped, the crane 1 controls the second sling 12 to remain slack, and then triggers the mechanism 544 to tighten it. The triggering mechanism 544 triggers the winding wheel 541 to wind up, causing the winding wheel 541 to drive the second sling 12 and multiple third slings 42 to wind up synchronously until the stop block 542 contacts the cone hole 543. At this time, the third slings 42 are in a taut state. At the same time, the triggering mechanism 544 restores the rotation restriction on the winding wheel 541, and the crane 1 makes the second sling 12 taut. Then, through the cooperation of the first sling 11, the second sling 12 and multiple third slings 42, the lifting of the steel box girder segment 2 is controlled synchronously to ensure the stability of the steel box girder segment 2 during the lifting process.

[0050] like Figures 5 to 8 As shown, the triggering 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 reel 541, the slider 5442 is slidably connected to the mounting base 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 toothed groove 5443 adapted to the gear 5441; the mounting block 5444... A compression spring 5445 is disposed between the mounting block 5444 and the mounting base 51 and is located on the slider 5442. When the slider 5442 is unrestrained, the compression spring 5445 is used to push the tooth groove 5443 and the gear 5441 to resume meshing. 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 and the gear 5441 to separate.

[0051] It should be noted that after crane 1 is tilted via the first sling 11, the second sling 12 is first slack. Then, crane 1 drives the steel box girder segment 2 to descend, causing push rod 5446 to contact the conveying mechanism 3. As the steel box girder segment 2 continues to descend, push rod 5446 moves, which in turn moves slider 5442, stretching compression spring 5445. This simultaneously causes tooth groove 5443 to separate from gear 5441, releasing the restriction on winding wheel 541. At this time, torsion spring drives winding wheel 541 to rotate, causing winding wheel 541 to simultaneously wind up the second sling 12 and the third sling 42. The stop block 542 between the second sling 12 and the third sling 42 is moved until the stop block 542 abuts against the conical hole 543, at which point 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, causing the push rod 5446 to separate from the conveying mechanism 3, so that the compression spring 5445 drives the push rod 5446 to reset, thereby driving the tooth groove 5443 to mesh with the gear 5441, that is, restoring the restriction on the winding wheel 541. Then, the second sling 12 is restored to a taut state by the crane 1. 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 lifted by the crane 1 to achieve stable lifting of the steel box girder segment 2.

[0052] like Figures 1 to 3 and Figures 9 to 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 is understood that the airbag 5451 is existing technology and the airbag 5451 is an elastic structure. After the inflated airbag 5451 loses its restraint, it can automatically recover; 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 tensioned, the second linkage mechanism drives the airbag 5451 to inflate, so as to increase the friction between the airbag 5451 and the positioning rope 52.

[0053] It should be noted that when the wind force on the steel box girder segment 2 is too strong, in order to prevent the third suspending cable 42 from breaking due to excessive force or from moving due to excessive force, causing the conveying mechanism 3 floating on the river surface to move and affecting the hoisting, a buffer mechanism 545 is set up. This buffers the third suspending cable 42 when it is subjected to excessive tension, preventing excessive force on the third suspending cable 42 and reducing the sway amplitude of the steel box girder segment 2 and the conveying mechanism 3. Specifically, when the third suspending cable 42 is subjected to tension, the second linkage mechanism of the stabilizing mechanism 5 activates the airbag 5451. When subjected to force, the expansion can offset part of the tension on the third sling 42, ensuring the stability of the crane 1 during hoisting. The inflated airbag 5451 increases the friction between itself and the third sling 42, allowing the hoisting work to stop and the steel box girder segment 2 to be maintained at a certain height. The friction between the airbag 5451 and the third sling 42 then counteracts the influence of wind on the steel box girder segment 2. Hoisting work can resume once the wind weakens and the friction between the airbag 5451 and the third sling 42 decreases, further reducing the swaying of the steel box girder segment 2 during hoisting.

[0054] like Figures 9 to 10 As shown, it is understood that this application does not limit the specific structure and installation method of the second linkage mechanism. The following only provides a feasible technical solution: The second linkage mechanism includes a piston cylinder 5452, a piston 5453, a piston rod 5454, and a vent pipe 5455; the piston cylinder 5452 is disposed in the sliding sleeve 53, and a first vent 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 vent 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; an installation 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 under tension, the piston rod 5454 drives the piston 5453 to move. The piston 5453 compresses the air in the piston cylinder 5452, causing the air in the piston cylinder 5452 to rush into the airbag 5451 through the first vent 5456. This causes the airbag 5451 to expand under pressure, which can offset part of the tension on the third sling 42 and ensure the lifting stability of the crane 1.

[0056] like Figures 2 to 3As shown, it is understood that this application does not limit the specific structure and installation method of the conveying mechanism 3. The following only provides a feasible technical solution: The conveying mechanism 3 includes a mounting plate 31, a float 32, and a mounting frame 33; the mounting plate 31 floats on the river surface through the float 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; multiple lugs 41 are fixed to the mounting plate 31; when the crane 1 tightens the multiple third slings 42, it can drive the mounting plate 31 to move until the tension of the multiple third slings 42 is the same. At this time, the steel box girder segment 2 on the mounting frame 33 can be moved directly below the crane 1; it is understood that in order to ensure that the tension of the third slings 42 is the same, a tension sensor can be installed between the third slings 42 and the crane 1 to detect the tension of the third slings 42; the tension sensor is prior art and will not be described in detail.

[0057] like Figures 1 to 11 As shown, a construction method for a steel box girder segment hoisting and tilting positioning device for river transport includes the following steps:

[0058] Step 1, River Surface Positioning: After the steel box girder segment 2 is moved to the bottom of the crane 1 by the conveying mechanism 3, the multiple third slings 42 are first connected to the conveying mechanism 3 through the lugs 41. Then, the crane 1 drives the third slings 42 to wind up, so that the multiple third slings 42 are tightened with the same tension.

[0059] Step 2, hoisting and positioning: First, connect the first sling 11 and the second sling 12 to the opposite sides of the steel box girder segment 2. Then, use the crane 1 to wind up the first sling 11, causing the steel box girder segment 2 to rotate 90° to a vertical position. With the cooperation of the second sling 12, the steel box girder segment 2 is hoisted while remaining vertical. At this time, the rotation of the steel box girder segment 2 will cause the positioning rope 52 and the third sling 42 to tighten, so that the positioning rope 52 is kept taut when hoisting the steel box girder segment 2.

[0060] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A device for river transportation, hoisting and overturning and positioning of steel box girder segments, comprising a crane (1) for hoisting a steel box girder segment (2); characterized in that, The crane (1) is provided below with a conveying mechanism (3), and a positioning mechanism (4) and a stabilizing mechanism (5) for keeping the steel box girder segment (2) stable and hoisted are arranged between the crane (1) and the conveying mechanism (3); the positioning mechanism (4) comprises: a hanging ear (41), a plurality of the hanging ears (41) are arranged on the conveying mechanism (3); and a third sling (42), 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 with the conveying mechanism (3) through the hanging ear (41); 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) are connected with the steel box girder segment (2); the second sling (12) is connected with the steel box girder segment (2) through the mounting seat (51); a sliding sleeve (53), a plurality of the sliding sleeves (53) are slidingly connected to the third sling (42); and a positioning rope (52), one end of each of a plurality of the positioning ropes (52) is connected with the mounting seat (51), and the other end of each of the positioning ropes (52) is connected with each of the sliding sleeves (53); the stabilizing mechanism (5) further comprises a first linkage mechanism (54), 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 the steel box girder segment (2) is hoisted.

2. The steel box girder segment river transportation hoisting and overturning positioning device according to claim 1, characterized in that, the first linkage mechanism (54) comprises a winding wheel (541), a stop block (542) and a trigger mechanism (544); the winding wheel (541) is rotationally connected to the mounting seat (51), a taper hole (543) is formed in the mounting seat (51), one end of the second sling (12) is wound on the winding wheel (541) and then passes through the taper hole (543) to be connected with a plurality of the third slings (42), and the stop block (542) is fixedly arranged at a connection position between the second sling (12) and the plurality of third slings (42); a torsion spring is arranged at a rotational 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.

3. The steel box girder segment river transportation, hoisting and overturning positioning device according to claim 2, characterized in that, the stop block (542) is in a spherical structure, the diameter of the spherical structure is smaller than the maximum diameter of the taper hole (543) and larger than the minimum diameter of the taper hole (543).

4. The steel box girder segment river transportation, hoisting and overturning positioning device according to claim 2, characterized in that, The trigger mechanism (544) comprises a gear (5441), a sliding block (5442), a mounting block (5444) and a compression spring (5445); the gear (5441) is coaxially arranged on the winding wheel (541); the sliding block (5442) is slidingly connected to the mounting base (51); when the crane (1) hoists the steel box girder segment (2), the movement direction of the steel box girder segment (2) is parallel to the sliding direction of the sliding block (5442); the sliding block (5442) is provided with a gear slot (5443) matched with the gear (5441); the mounting block (5444) is arranged on the sliding block (5442); the compression spring (5445) is arranged between the mounting block (5444) and the mounting base (51); when the sliding block (5442) loses the restriction, the compression spring (5445) is used to push the gear slot (5443) and the gear (5441) to restore the engagement.

5. The river transportation, hoisting and overturning positioning device for steel box girder section as claimed in claim 4, characterized in that, The sliding block (5442) is fixedly provided with a push rod (5446); when the steel box girder segment (2) moves downward and approaches the conveying mechanism (3), the push rod (5446) is used to push the sliding block (5442) to move, so as to drive the gear slot (5443) and the gear (5441) to separate.

6. The river transportation, hoisting and overturning positioning device for steel box girder section as claimed in claim 1, characterized in that, A buffer mechanism (545) is arranged between each sliding sleeve (53) and positioning rope (52); the buffer mechanism (545) comprises an air bag (5451) and a second linkage mechanism; the sliding sleeve (53) is sleeved on the third sling (42) through the air bag (5451); the second linkage mechanism is arranged between the sliding sleeve (53) and the positioning rope (52); when the positioning rope (52) is tensioned under force, the air bag (5451) is expanded through the second linkage mechanism, so as to increase the friction between the air bag (5451) and the third sling (42).

7. The river transportation, hoisting and overturning and positioning device for steel box girder section as claimed in claim 6, characterized in that, The second linkage mechanism comprises a piston cylinder (5452), a piston (5453), a piston rod (5454) and an air pipe (5455); the piston cylinder (5452) is arranged in the sliding sleeve (53); a first air hole (5456) is arranged between the piston cylinder (5452) and the sliding sleeve (53), and the piston cylinder (5452) is connected with the air bag (5451) through the first air hole (5456); the piston (5453) is slidingly connected in the piston cylinder (5452), and the piston (5453) is connected with the positioning rope (52) through the piston rod (5454); an installation ring (5457) with a through hole is arranged between the piston cylinder (5452) and the sliding sleeve (53).

8. The construction method of a steel box girder segment river transportation, hoisting and overturning positioning device according to any one of claims 1-7, characterized in that, The method comprises the following steps: Step one, river positioning: after the steel box girder segment (2) is moved to the lower part of the crane (1) through the conveying mechanism (3), a plurality of third slings (42) are connected with the conveying mechanism (3) through the lug (41), and then the third slings (42) are wound by the crane (1), so that the plurality of third slings (42) are tightened with the same tightening force; Step two, hoisting and positioning: first, connect the first sling (11) and the second sling (12) with the opposite two sides of the steel box girder segment (2) respectively, then wind the first sling (11) through the crane (1), so that the steel box girder segment (2) is turned over 90° to be in a vertical state, and through the cooperation of the second sling (12), the steel box girder segment (2) is kept in a vertical state for hoisting; at this time, the steel box girder segment (2) and the third sling (42) are kept in a taut state through the stabilizing mechanism (5).

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