A hoisting device for steel box girder bridge construction

Abstract

The application discloses a hoisting equipment for steel box girder bridge construction and relates to the technical field of hoisting equipment, which comprises a machine body, a positioning device and a stabilizing device. The machine body comprises a connecting seat and a movable seat. The positioning device comprises four positioning components. The positioning component comprises a positioning structure, a first rope, a first winding roller and a first driving piece. The stabilizing device comprises two stabilizing components. The stabilizing component comprises a stabilizing piece, a second rope, a second winding roller and a second driving piece. A first locking pin is arranged on the movable seat, and a first locking groove is formed in the first winding roller. A second locking pin is arranged on the connecting seat, and a second locking groove is formed in the second winding roller. The application can effectively protect the driving piece during the hoisting of the steel box girder, reduce the probability of safety accidents caused by the imbalance of the steel box girder due to the failure of the driving piece, and realize the stable placement of the hoisting equipment without the need of workers to bear risks and assist in the stable placement.

Description

Technical Field

[0001] This application relates to the technical field of hoisting equipment, and in particular to hoisting equipment for the construction of steel box girder bridges. Background Technology

[0002] A bridge is a structure built to allow roads to cross natural or man-made obstacles. It is erected over rivers, lakes, and seas to enable vehicles and pedestrians to pass smoothly.

[0003] Among them, steel box girder bridges are one of the most common types of bridges. As the name suggests, they are bridges composed of multiple steel box girders. Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. The main body is constructed by welding a top plate, bottom plate, web plate, and transverse and longitudinal diaphragms. The top plate often adopts an orthogonal irregular bridge deck design with longitudinal stiffeners, which has the characteristics of strong bending and torsional resistance.

[0004] Currently, specific hoisting equipment is typically used to hoist steel box girders. This equipment usually connects to the steel box girder via multiple ropes that are controlled by drive components, and then a crane lifts the girder using hooks and other equipment.

[0005] However, because existing hoisting equipment relies primarily on ropes as the load-bearing structure, the drive components also bear significant forces during hoisting, making them prone to failure. This failure, in turn, can lead to rope loss of control, posing a substantial safety hazard. Furthermore, existing hoisting equipment requires placement entirely on top of the steel box girder for easy connection. Given the typically large mass of this equipment to ensure structural strength, workers are required to assist in placing it on top of the girder to ensure stability. Failure to do so can result in structural damage to the girder or the hoisting equipment, creating further safety risks for the workers. Summary of the Invention

[0006] This application provides a hoisting device for steel box girder bridge construction, which can effectively protect the drive components during the hoisting process of the steel box girder, reduce the probability of safety accidents caused by the imbalance of the steel box girder due to the failure of the drive components, and at the same time achieve stable placement of the hoisting device without requiring personnel to bear the risk of assisting in its stable placement.

[0007] This application provides a hoisting equipment for the construction of steel box girder bridges, employing the following technical solution: A hoisting device for the construction of a steel box girder bridge includes a machine body, a positioning device, and a stabilizing device; The body includes a connecting seat and a movable seat; the top of the connecting seat is for connection with a hook, and the movable seat is located below the connecting seat, and the movable seat and the connecting seat are movably connected in the vertical direction. The positioning device is disposed on the connecting seat and includes four positioning components, which are respectively disposed at the four corners of the connecting seat. Each positioning component includes a positioning structure, a first rope, a first winding roller, and a first driving member. The first winding roller is rotatably connected to the connecting seat, and the first driving member is used to drive the first winding roller to rotate. The positioning structure is disposed on the outside of the connecting seat and is used for detachable connection and positioning with the corners of the steel box girder. The two ends of the first rope are respectively connected to the first winding roller and the positioning structure. The stabilizing device is mounted on the movable seat and includes two stabilizing components, which are respectively located at both ends of the movable seat. Each stabilizing component includes a stabilizing member, as well as a plurality of corresponding second ropes, a plurality of second take-up rollers, and a plurality of second driving members. The second take-up rollers are rotatably connected to the movable seat, and the second driving members are used to drive the second take-up rollers to rotate. The stabilizing member has a groove for the side protrusion of the top of the steel box girder to be engaged, and the two ends of the second ropes are respectively connected to the second take-up rollers and the stabilizing member. The movable seat is provided with four first locking pins, and each of the four first winding rollers is provided with a first locking groove; the connecting seat is provided with multiple second locking pins, and each of the multiple second winding rollers is provided with a second locking groove. When the movable seat moves to its limit position towards the connecting seat, the second locking pin engages with the second locking groove, and the rotation of the second take-up roller is restricted; thereafter, after the movable seat moves away from the connecting seat, the first locking pin engages with the first locking groove, and the rotation of the first take-up roller is restricted. During hoisting, the first locking pin engages with the first locking slot, the movable seat maintains a certain amount of movement relative to the connecting seat, and both the first rope and the second rope are taut.

[0008] By adopting the above technical solution, the hoisting equipment can be stably placed on the steel box girder without the assistance of personnel during the connection process. Subsequently, personnel will use a stabilizing device to form an initial connection with the steel box girder and drive the movable seat to be centered at the top of the steel box girder, facilitating the subsequent fixed connection between the positioning device and the steel box girder. During the hoisting of the steel box girder, the stabilizing device can stably maintain the positional balance of the steel box girder, and the second rope is subjected to less stress, reducing the probability of failure of the second drive component. Furthermore, due to the stable operation of the stabilizing device, the probability of the first rope being subjected to increased stress due to imbalance during the transportation of the steel box girder can be effectively reduced. At the same time, the insertion and cooperation of the first locking pin and the first locking groove can also effectively reduce the probability of damage to the first drive component. Thus, the drive component can be effectively protected during the hoisting of the steel box girder, reducing the probability of safety accidents caused by the imbalance of the steel box girder due to the failure of the drive component, and effectively improving the safety of the personnel throughout the entire operation.

[0009] Optionally, the positioning structure includes a main body, three support plates, and a connector; The main body is composed of three perpendicularly spliced ​​plates, each with different length, width and height dimensions, and each plate has a positioning groove that matches the top corner of the steel box girder. The three support plates are respectively movably installed on the three plates, and the support plates are used to contact the bottom of the top corner of the steel box girder; The connector is located on the outside of the main body, with one end close to the intersection of the three plates, and the other end for the first rope to connect.

[0010] By adopting the above technical solution, construction personnel can easily control the main body to be used in a suitable position according to the thickness of the top protrusion of the steel box girder. After the top of the steel box girder is inserted into the positioning groove, the bottom of the main body is located below it. Subsequently, controlling the movement of the corresponding support plate can provide support for the steel box girder and adapt to the size of the top protrusion of different steel box girders.

[0011] Optionally, the positioning structure may further include a plurality of bolts for fixing the support plate; The support plate is rotatably connected to the side of the plate away from the other plates, and the three support plates are respectively disposed on both sides of the largest plate and on the length side of the medium-sized plate; When the support plate rotates to its limit position in the direction close to the positioning groove, the support plate is parallel to the plate body located above the top corner of the steel box girder, and the bolt passes through the plate body and engages with its thread.

[0012] By adopting the above technical solution, construction personnel can easily control the movement of the support plate to provide support for the steel box girder, and at the same time, it can effectively improve the positioning stability of the positioning structure at the top corners of the steel box girder.

[0013] Optionally, the positioning structure further includes three elastic pads that correspond one-to-one with the three plates; The elastic pad is disposed on the side of the plate near the positioning groove, and is used to directly contact the corner of the steel box girder.

[0014] By adopting the above technical solutions, the probability of wear on the top corners of the steel box girder caused by the positioning structure during hoisting can be reduced, and the probability of the steel box girder slipping relative to the positioning structure during hoisting can also be reduced, thereby further improving the safety and stability of the hoisting process.

[0015] Optionally, the elastic pad has a cavity inside, and the plate is provided with a nozzle for controlling the gas entering and exiting the cavity.

[0016] By adopting the above technical solution, construction personnel can easily control the expansion of the elastic pad located above the steel box girder, so that the top corners of the steel box girder are clamped and positioned between the elastic pad and the support plate, thereby improving the positioning effect of the positioning structure. At the same time, it can further improve the adaptability of the positioning structure to the top protrusion of steel box girders of different sizes.

[0017] Optionally, the positioning structure further includes a rotating component; The rotating component is unidirectionally rotatable on the outside of the main body and near the intersection of the three plates. Its rotation axis is at the same angle to the outer side of the three plates, and the multiple rotating components have the same rotatable direction relative to the corresponding main body. One end of the connecting component is ball-jointed with the rotating component, and the rotating component has a limiting groove for the connecting component to be inserted.

[0018] By adopting the above technical solution, the connector can be easily rotated to a position where its length direction is parallel to the length direction of the first rope during the hoisting process. This facilitates the application of force by the hoisting components to the steel box girder and makes the stress on the positioning structure more reasonable. Furthermore, after the connector is inserted into the limiting groove, the positional stability of the connector relative to the main body during the hoisting process can be effectively improved. This can effectively reduce the probability that the steel box girder will sway during the hoisting process, causing the connector to rotate relative to the main body and thus leading to the imbalance of the steel box girder.

[0019] Optionally, the end of the connector away from the first rope is located in the positioning groove and is used to contact the three elastic pads; The three elastic pads tend to drive the length direction of the connector to be parallel to the axis of the rotating member, and when the length direction of the connector is inclined relative to the axis of the rotating member, the connector compresses at least one of the elastic pads.

[0020] By adopting the above technical solution, the connecting parts rotate relative to the main body during the hoisting process. After rotation, they will squeeze the two elastic pads located below, causing the elastic pads to deform and increase their tightness with the outer side of the top of the steel box girder. This can effectively reduce the probability of a gap between the top of the steel box girder and the elastic pads, which would reduce the relative positional stability of the positioning structure and the steel box girder.

[0021] Optionally, when all three support plates are rotated to their limit positions in the direction of approaching the positioning groove, the three support plates respectively cover the three openings of the positioning groove.

[0022] By adopting the above technical solution, the elastic pad can be effectively protected in the positioning groove when the positioning structure is not in use, thereby effectively extending the service life of the elastic pad and improving the reliability of the elastic pad in protecting the steel box girder and preventing slip positioning.

[0023] Optionally, the bottom of the movable seat is provided with a plurality of first rolling balls.

[0024] By adopting the above technical solution, it is possible to facilitate the movement of the movable seat before hoisting to a central position relative to the steel box girder during the operation of the stabilizing device, while the seat is in contact with the top of the steel box girder through multiple first rolling balls.

[0025] Optionally, a plurality of second rolling balls are rolled on the stabilizing member. After the top of the steel box girder is inserted into the slot, the second rolling balls contact one side of the top of the steel box girder, and the second rope tilts downward toward the stabilizing member.

[0026] By adopting the above technical solution, the stabilizing component can be easily inserted into the slot at the top of the steel box girder. Then, by tightening the second rope, the stabilizing component is driven to move relative to the steel box girder through multiple second rolling balls. This allows the stabilizing component to exert an upward force on the steel box girder, and the two stabilizing components are symmetrically distributed relative to the movable seat, thereby further improving the reliability of the stabilizing component in achieving the stabilizing effect.

[0027] In summary, this application includes at least one of the following beneficial effects: 1. It can effectively protect the driving components during the hoisting of steel box girders, improve the balance and stability of the steel box girders, and reduce the probability of safety accidents caused by the imbalance of the steel box girders due to the failure of the driving components; 2. Before and during the hoisting of the steel box girder, stabilizing devices can be used to ensure that the hoisting equipment is centered and stable relative to the steel box girder, facilitating the hoisting and transportation of the steel box girder; 3. The positioning device can adapt to the raised edge of the top of steel box girders of different thicknesses and dimensions, and can effectively reduce the probability of wear on the edges and corners of the top of the steel box girder during hoisting. 4. It can effectively improve the balance of steel box girders during hoisting and reduce the probability of them becoming unbalanced under the influence of external forces such as strong winds, thereby further improving the positional stability of steel box girders during hoisting. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of a hoisting equipment used in the construction of a steel box girder bridge according to an embodiment of this application; Figure 2 This is a top view of a steel box girder bridge construction hoisting equipment during hoisting, according to an embodiment of this application. Figure 3 This is a schematic diagram of the internal structure of the machine body in an embodiment of this application; Figure 4 This is a sectional view of a hoisting device used in the construction of a steel box girder bridge according to an embodiment of this application during hoisting. Figure 5 This is a schematic diagram of the positioning structure in the embodiments of this application; Figure 6 This is a partial cross-sectional view of the positioning structure in an embodiment of this application; Figure 7 This is a cross-sectional view of the positioning structure in the embodiments of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Steel box girder; 11. Lug; 2. Machine body; 21. Connecting seat; 211. Second locking pin; 22. Movable seat; 221. First ball bearing; 222. First locking pin; 3. Stabilizing device; 30. Stabilizing component; 31. Stabilizing element; 311. Slot; 312. Second ball bearing; 32. Second rope; 33. Second take-up roller; 331. Second locking groove; 34. Second driving element; 4. Positioning device ; 40. Positioning component; 41. Positioning structure; 411. Main body; 4111. Plate; 4112. Positioning groove; 412. Support plate; 413. Bolt; 414. Elastic pad; 4141. Cavity; 415. Air nozzle; 416. Connector; 4161. Extension; 417. Rotating component; 4171. Limiting groove; 42. First rope; 43. First take-up roller; 431. First locking groove; 44. First driving component. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0031] This application discloses a hoisting device for the construction of a steel box girder bridge. It is used in conjunction with specific lifting equipment (such as a crane). After the lifting equipment is connected to the hoisting device via a hook, a connection is formed between the hoisting device and the steel box girder, thereby enabling the hoisting, movement, and installation of the steel box girder. In this embodiment, since the hoisting equipment with the above functions is prior art in this field, it will not be described in detail here, and its representation is omitted in the accompanying drawings.

[0032] Reference Figure 1 and Figure 2 The steel box girder 1 has a rectangular parallelepiped structure. Both sides of its top, along its width direction, have protruding flanges 11, which are also rectangular parallelepiped structures. In this embodiment, since the steel box girder 1 is a common existing technology, it will not be described in detail here, and the accompanying drawings only provide a brief representation.

[0033] Reference Figure 3 and Figure 4 The hoisting equipment includes a body 2, a stabilizing device 3, and a positioning device 4.

[0034] Reference Figure 1 and Figure 4 The body 2 includes a connecting seat 21 for connecting a hook thereto and a movable seat 22 movably connected to the connecting seat 21; the top of the connecting seat 21 is for connecting the hook thereto, and the movable seat 22 is installed below the connecting seat 21, with the movable seat 22 moving vertically. In this embodiment, preferably, the cross-sections of both the connecting seat 21 and the movable seat 22 are square, and the cross-sectional dimension of the movable seat 22 is larger than that of the connecting seat 21; and preferably, the movable seat 22 remains connected to the connecting seat 21 during its movement relative to the connecting seat 21.

[0035] Reference Figure 3 and Figure 4 Multiple first rolling balls 221 are spherically mounted on the bottom of the movable seat 22. The first rolling balls 221 are spherically hinged to the movable seat 22, and when the movable seat 22 contacts the top of the steel box girder 1 through the multiple first rolling balls 221, the movable seat 22 is in a position parallel to the surface of the top of the steel box girder 1. At this time, the movable seat 22 can roll above the steel box girder 1 and move relative to the steel box girder 1 through the multiple first rolling balls 221. In this embodiment, preferably, four first rolling balls 221 are installed on the bottom of the movable seat 22. The four first rolling balls 221 are distributed in a square array on the bottom of the movable seat 22, and the four first rolling balls 221 are respectively close to the four corners of the movable seat 22.

[0036] The stabilizing device 3 is installed on the movable seat 22. It is used to help the movable seat 22 to be centered above the steel box girder 1 and to help the movable seat 22 and the steel box girder 1 maintain a stable relative position during hoisting.

[0037] The stabilizing device 3 includes two stabilizing components 30, which are respectively installed on both sides of the movable seat 22. When the movable seat 22 contacts the top of the steel box girder 1, the two stabilizing components 30 are respectively close to the two side flanges 11 of the steel box girder 1, and the two stabilizing components 30 are respectively used to form a connection relationship with the adjacent flanges 11.

[0038] Reference Figure 1 and Figure 3 The stabilizing component 30 includes a stabilizing member 31 and a plurality of corresponding second ropes 32, a plurality of second take-up rollers 33, and a plurality of second driving members 34. In this embodiment, the stabilizing component 30 preferably includes two second ropes 32, two second take-up rollers 33, and two second driving members 34.

[0039] Reference Figure 1 and Figure 4 The stabilizing member 31 has a rectangular parallelepiped structure and a slot 311 for the protruding edge 11 to be inserted into. The slot 311 is also rectangular parallelepiped. In this embodiment, preferably, the slot 311 extends through both ends of the stabilizing member 31 in the length direction and one side in the width direction to form an opening. Preferably, the length direction of the slot 311 is parallel to the length direction of the stabilizing member 31, and the width direction of the slot 311 is parallel to the width direction of the stabilizing member 31.

[0040] Reference Figure 3 and Figure 4 The second take-up roller 33 has a cylindrical structure and is rotatably mounted on the movable seat 22. Its rotation axis coincides with its own axis and is parallel to the direction of movement of the movable seat 22. In this embodiment, preferably, the two second take-up rollers 33 are located at both ends of the movable seat 22 near the adjacent convex edge 11 and near the two corners of the movable seat 22; and preferably, the second take-up rollers 33 are located above the movable seat 22.

[0041] The second drive member 34 is fixedly mounted on the movable base 22 and is used to drive the corresponding second take-up roller 33 to rotate relative to the movable base 22. In this embodiment, the second drive member 34 is preferably a servo motor; and preferably, the second drive member 34 is mounted inside the movable base 22 and located below the corresponding second take-up roller 33.

[0042] One end of the second rope 32 is fixedly connected to the second take-up roller 33 and can be wound and wound on the second take-up roller 33, and the other end of the second rope 32 is fixedly connected to the stabilizer 31. In this embodiment, preferably, one end of the stabilizer 31 in the height direction has a structure for fixing the second rope 32 (such as a lifting lug); and preferably, when the protruding edge 11 is inserted into the slot 311, the position where the second rope 32 is fixedly connected to the stabilizer 31 is located at the top of the stabilizer 31.

[0043] Reference Figure 2 and Figure 3 Furthermore, preferably, the four second drive members 34 of the two stabilizing components 30 drive the corresponding second take-up rollers 33 to rotate synchronously relative to the movable seat 22, and make the lengths of the four corresponding second ropes 32 released remain equal; at this time, when the two stabilizing members 31 are respectively firmly connected to the two protruding edges 11 and the four second ropes 32 are all in a taut state, the length direction of the released part of the second rope 32 will be perpendicular to the length direction of the stabilizing member 31, and the movable seat 22 will be centered at the top of the steel box girder 1 along the width direction of the steel box girder 1.

[0044] Reference Figure 2 and Figure 4 Furthermore, preferably, a plurality of second rolling balls 312 are rolled on the side of the stabilizing member 31 near the slot 311. The second rolling balls 312 are spherically hinged to the stabilizing member 31, and the plurality of second rolling balls 312 are evenly distributed along the length direction of the stabilizing member 31. When the protruding edge 11 is inserted into the slot 311 and the second rope 32 is in a relaxed state, the stabilizing member 31 will maintain the position where the protruding edge 11 is in contact with the top wall of the slot 311 under its own gravity. At this time, the plurality of second rolling balls 312 will be located on the side of the protruding edge 11 near the stabilizing member 31 along the width direction of the steel box girder 1. Afterward, as the second rope 32 is gradually tightened to a taut state, the part of the second rope 32 that is released will remain inclined downward toward the stabilizing member 31. After the second rolling balls 312 come into contact with the protruding edge 11, they will remain in contact and allow the stabilizing member 31 to move relative to the protruding edge 11 by the rolling of the second rolling balls 312 until the bottom of the protruding edge 11 comes into contact with the bottom wall of the slot 311. In this embodiment, the movable seat 22 preferably has a pulley structure for guiding the release of the second rope 32, and the position of the pulley structure is kept higher than the stabilizing member 31 when it is engaged with the protruding edge 11 into the slot 311. Since the pulley structure with the above function is a common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0045] Reference Figure 1 and Figure 2 The positioning device 4 is installed on the connecting seat 21. It is used to form a stable connection with the steel box girder 1 after positioning, so as to ensure the safety and stability of the subsequent hoisting process of the steel box girder 1.

[0046] The positioning device 4 includes four positioning components 40 and four stabilizing components 30, which are respectively installed at the four corners of the connecting seat 21. When the movable seat 22 contacts the top of the steel box girder 1, the four positioning components 40 are respectively close to the four corners of the top of the steel box girder 1, and the four positioning components 40 are respectively used to position the corners adjacent to the top of the steel box girder 1 to form a stable connection.

[0047] Reference Figure 1 and Figure 5 The positioning assembly 40 includes a positioning structure 41 for positioning and forming a stable connection with the corner of the protrusion 11, a first rope 42, a first take-up roller 43, and a first drive member 44.

[0048] Reference Figure 1 and Figure 3 The first take-up roller 43 has a cylindrical structure and is rotatably mounted on the connecting seat 21. Its rotation axis coincides with its own axis and is parallel to the height direction of the connecting seat 21. In this embodiment, the first take-up roller 43 is preferably located on the outside of the connecting seat 21.

[0049] The first driving member 44 is fixedly mounted on the connecting seat 21 and is used to drive the corresponding first take-up roller 43 to rotate relative to the connecting seat 21. In this embodiment, the first driving member 44 is preferably a servo motor; and preferably the first driving member 44 is installed inside the connecting seat 21 and located on one side of the corresponding first take-up roller 43, and the first driving member 44 drives the corresponding first take-up roller 43 to rotate through a gear set.

[0050] One end of the first rope 42 is fixedly connected to the first take-up roller 43 and can be wound and wound on the first take-up roller 43, while the other end of the first rope 42 is fixedly connected to the positioning structure 41. In this embodiment, the positioning structure 41 preferably also has a structure (such as a lifting lug) to facilitate the connection between the first rope 42 and it; and preferably the connecting seat 21 has a pulley structure for guiding the release of the first rope 42, adapting to the first rope 42 extending outward at different angles, and for guiding the first rope 42 to extend downward at an angle after being released.

[0051] Reference Figure 1 and Figure 5 The positioning structure 41 includes a main body 411, three support plates 412, multiple bolts 413, three corresponding elastic pads 414 and three air nozzles 415, a connector 416 and a rotating part 417.

[0052] Reference Figure 5 and Figure 6The main body 411 is composed of three plates 4111. The plates 4111 are rectangular in shape and are joined together perpendicularly to form the main body 411. The main body 411 is rectangular in shape and has different length, width and height dimensions. It also has positioning grooves 4112 inside that are adapted to the corners of the protruding edge 11. In this embodiment, the positioning groove 4112 preferably has an opening in the length, width and height directions of the main body 411; and preferably the length, width and height of the main body 411 decrease in sequence; at this time, the construction personnel can select the main body 411 to use in a suitable position according to the thickness of the protruding edge 11, so that after the corner of the protruding edge 11 is matched with the positioning groove 4112, the bottom of the main body 411 is located below the protruding edge 11 (for example, when the thickness of the protruding edge 11 is greater than the height of the main body 411 and less than the width of the main body 411, the main body 411 will be used in a vertical position in its width direction, and the three plates 4111 will respectively contact the two sides of the top of the corner of the protruding edge 11).

[0053] The support plate 412 has a rectangular plate-like structure and is rotatably connected to the main body 411. It is used to contact the bottom of the corner of the protruding edge 11 to provide support. In this embodiment, preferably, the three support plates 412 are rotatably installed on the two sides of the largest rectangular plate 4111 away from the other plates 4111 and on the side of the second largest rectangular plate 4111 away from the other plates 4111 along its length. Preferably, the support plate 412 is rotatably connected to the corresponding plate 4111 along its own length side, and the axis of rotation of the support plate 412 is parallel to its own length direction.

[0054] The support plate 412 is restricted during rotation relative to the main body 411. When the support plate 412 rotates to its limit position in the direction of approaching the positioning groove 4112, the support plate 412 just covers the opening of the adjacent positioning groove 4112; when all three support plates 412 rotate to their limit positions in the direction of approaching the positioning groove 4112, the three support plates 412 will cover the three openings of the positioning groove 4112 respectively, so that the main body 411 forms a hollow cuboid structure.

[0055] The support plate 412 has multiple threaded grooves on one side along its length for bolts 413 to engage with it, and the plate body 4111 has multiple through holes for bolts 413 to pass through. When the support plate 412 rotates to its limit position towards the positioning groove 4112, the multiple threaded grooves on the support plate 412 will correspond one-to-one with and align with the multiple through holes on the adjacent plate body 4111, allowing multiple bolts 413 to pass through and engage with the support plate 412 through the threaded connection, thus fixing the support plate 412 relative to the main body 411 in its current position. In this embodiment, since the bolts 413 with the above-mentioned functions are common prior art, they will not be described in detail here, and only a brief representation is given in the accompanying drawings.

[0056] Reference Figure 6 and Figure 7 Three elastic pads 414 correspond one-to-one with three plates 4111. Each elastic pad 414 has a rectangular parallelepiped structure and is fixedly installed on the side of the corresponding plate 4111 near the positioning groove 4112, with an internal cavity 4141. Three air nozzles 415 also correspond one-to-one with the three plates 4111. Each air nozzle 415 is fixedly installed on its corresponding plate 4111, with one end passing through the corresponding plate 4111 and fixedly connected to the corresponding elastic pad 414, communicating with the corresponding cavity 4141. The other end is controllable, allowing construction personnel to control the flow of gas into and out of the cavity 4141 as needed. In this embodiment, since the air nozzle 415 with the above functions is common prior art, it will not be described in detail here, and only a brief representation is given in the accompanying drawings.

[0057] When the corner of the steel box girder 1 is engaged in the positioning groove 4112 and a support plate 412 rotates to its limit position towards the positioning groove 4112 and is located below the corner of the steel box girder 1, the elastic pad 414 located at the top of the corner of the steel box girder 1 is inflated by the air nozzle 415 located at the top of the main body 411. This inflates the pad until the corner of the steel box girder 1 is clamped and positioned between the elastic pad 414 and the support plate 412. At this point, the positioning structure 41 is positioned with the corner of the steel box girder 1 and forms a stable connection. In this embodiment, preferably when the positioning structure 41 is positioned with the corner of the steel box girder 1 and forms a stable connection, the elastic pads 414 on both sides of the corner of the steel box girder 1 will also contact and abut against it.

[0058] Reference Figure 5 and Figure 7One end of the connector 416 in the length direction is ball-jointed to the main body 411 at the junction of the three plates 4111. The other end of the connector 416 in the length direction has a structure (such as a lug structure) for the first rope 42 to be fixedly connected to it. The end of the connector 416 near the positioning groove 4112 extends outward along its own length direction with an extension 4161 that penetrates into the positioning groove 4112. The extension 4161 remains in contact with the three elastic pads 414 as the connector 416 moves relative to the main body 411.

[0059] When the three elastic pads 414 are not inflated and are not compressed by other external forces, the positions of the three elastic pads 414 near the intersection will all contact the extension 4161, and the three elastic pads 414 have a tendency to drive the connector 416 to maintain a certain position relative to the main body 411. At this time, the angle between the length direction of the connector 416 and the plane where the three plates 4111 are located is equal.

[0060] The rotating component 417 is unidirectionally rotatable and mounted on the outside of the main body 411, located at the junction of the three plates 4111, and its rotation axis makes equal angles with the planes containing the three plates 4111. The rotating component 417 surrounds the end of the connector 416 near the main body 411, and the rotation axis of the rotating component 417 coincides with the axis of the connector 416 when it is in a certain position. The rotating component 417 has a limiting groove 4171 for the connector 416 to engage near the main body 411. When the connector 416 engages in the limiting groove 4171, the rotation of the connector 416 relative to the main body 411 in one direction is restricted. In this embodiment, it is preferable that adjacent positioning structures 41 are used in a mutually symmetrical position; and preferably, the rotation restriction directions of the connector 416 on adjacent positioning structures 41 are opposite. Since unidirectional rotation connection is a common existing technology (such as ratchet and tooth structures), it will not be described in detail here, and its representation is omitted in the accompanying drawings.

[0061] During the hoisting process, as the first rope 42 tightens, the connector 416 will rotate upward relative to the main body 411, allowing the connector 416 to engage in the limiting groove 4171 on the pre-adjusted rotating part 417. Simultaneously, during this process, the extension 4161 will intensify the compression of the elastic pads 414 on both sides of the corner of the steel box girder 1, and reduce the compression of the elastic pad 414 on the top of the corner of the steel box girder 1. This increases the tightness of the elastic pads 414 on both sides of the corner of the steel box girder 1 against the side of the rigid beam (reducing the probability of gaps), and increases the contact area between the elastic pad 414 on the top of the corner of the steel box girder 1 and the top of the steel box girder 1.

[0062] Reference Figure 3 and Figure 4 Furthermore, it is preferable that the movable seat 22 moves relative to the connecting seat 21 under its own gravity.

[0063] When the movable seat 22 moves downward relative to the connecting seat 21 to its limit position and the movable seat 22 is in the position of being on top of the steel box girder 1, the construction personnel operate the stabilizing device 3; when the movable seat 22 moves upward relative to the connecting seat 21 to a certain distance and the movable seat 22 is in the position of being on top of the steel box girder 1, the construction personnel operate the positioning device 4.

[0064] Furthermore, to reduce the probability of the stabilizing device 3 and the positioning device 4 operating at the wrong time, and to reduce the probability of safety accidents caused by the decrease in positioning stability due to the failure or misoperation of the positioning device 4 during the hoisting of the steel box girder 1, it is preferable that the movable seat 22 is also equipped with four first locking pins 222 respectively used to restrict the rotation of the four first winding rollers 43 relative to the connecting seat 21, and the connecting seat 21 is also equipped with four second locking pins 211 respectively used to restrict the rotation of the four second winding rollers 33 relative to the movable seat 22.

[0065] The first take-up roller 43 has a first locking groove 431 adapted to the first locking pin 222. The first locking groove 431 forms an opening at the top of the first take-up roller 43, and the first locking groove 431 has a flared structure near its opening for guiding the insertion of the first locking pin 222. The first locking pin 222 is unidirectionally rotatably mounted on the top of the movable seat 22. The rotation axis of the first locking pin 222 coincides with the rotation axis of the corresponding first take-up roller 43, and the first locking pin 222 is aligned with the corresponding first locking groove 431 along its own rotation axis. When the movable seat 22 moves upward relative to the connecting seat 21 to the limit position, the first locking pin 222 will be located above the corresponding first take-up roller 43. When the movable seat 22 moves downward relative to the connecting seat 21 to the limit position, the first positioning pin will be inserted into the corresponding first positioning groove 4112, so that the rotation of the first take-up roller 43 relative to the connecting seat 21 is restricted in one direction, and at this time the first rope 42 cannot continue to be released. In this embodiment, since unidirectional rotational connection is a common existing technology (such as ratchet and tooth structure), it will not be described in detail here, and its expression is omitted in the accompanying drawings.

[0066] The second take-up roller 33 has a second locking groove 331 adapted to the second locking pin 211. The second locking groove 331 forms an opening at the top of the second take-up roller 33, and the second locking groove 331 has a flared structure near its opening for guiding the insertion of the second locking pin 211. The second locking pin 211 is unidirectionally rotatably mounted on the top of the connecting seat 21. The rotation axis of the second locking pin 211 coincides with the rotation axis of the corresponding second take-up roller 33, and the second locking pin 211 is aligned with the corresponding second locking groove 331 along its own rotation axis. When the movable seat 22 moves downward relative to the connecting seat 21 to its limit position, the second locking pin 211 will be located above the corresponding second take-up roller 33. When the movable seat 22 moves upward relative to the connecting seat 21 to its limit position, the second positioning pin will be inserted into the corresponding second positioning groove 4112, so that the rotation of the second take-up roller 33 relative to the connecting seat 21 is unidirectionally restricted, and at this time the second rope 32 cannot continue to be released. In this embodiment, since unidirectional rotational connection is a common existing technology (such as ratchet and tooth structure), it will not be described in detail here, and its expression is omitted in the accompanying drawings.

[0067] During the process of establishing a connection between the hoisting equipment and the steel box girder 1, the hoisting equipment is first controlled to maintain a position where the movable seat 22 is in contact with the top of the steel box girder 1 and the second locking pin 211 is disengaged from the second locking groove 331. In this state, the stabilizing device 3 is operated to make the protruding edge 11 engage with the groove 311 and the second rope 32 be taut. Then, the connecting seat 21 is controlled to move downward relative to the movable seat 22 to the limit position, so that the second locking pin 211 engages with the second locking groove 331, thereby keeping the stabilizing device 3 in a stable position. This facilitates the operation of the positioning device 4 by construction personnel and reduces the probability of affecting the stabilizing device 3 during the operation of the positioning device 4.

[0068] During the hoisting process of the lifting equipment for the steel box girder 1, after the control connecting seat 21 moves upward a certain distance relative to the movable seat 22, all four first ropes 42 are taut. At this time, the movable seat 22 still has room for upward movement relative to the connecting seat 21. Therefore, the stabilizing device 3 does not have a lifting effect on the steel box girder 1 at this time, but only plays a role in helping the steel box girder 1 maintain balance during the hoisting process. At the same time, the first locking pin 222 and the first locking groove 431 are engaged to restrict the rotation of the first winding roller 43, thereby protecting the corresponding first driving component 44 and effectively improving the stability of the positioning device 4 during the hoisting process.

[0069] The implementation principle of a hoisting device for steel box girder bridge construction according to an embodiment of this application is as follows: During the hoisting of the steel box girder 1, the hoisting equipment is first moved to the position where the movable seat 22 moves downward to its limit relative to the connecting seat 21 and the movable seat 22 rests on top of the steel box girder 1. Then, the four second drive components 34 are controlled to drive the four second take-up rollers 33 to rotate, causing the four second ropes 32 to be released outward until the length of the second ropes 32 released is sufficient for the construction personnel to move the stabilizing component 31 so that the protruding edge 11 at the top of the steel box girder 1 can be engaged in the slot 311. The stabilizing component 31 is positioned such that the protruding edge 11 is engaged in the slot 311 and is in contact with the top wall of the slot 311. After being placed on the steel box girder 1, the four second drive components 34 are controlled to drive the four second take-up rollers 33 to rotate, causing the four second ropes 32 to tighten until the second ropes 32 are taut. During this process, the stabilizing component 31 will move relative to the steel box girder 1 through multiple second balls 312 until the convex edge 11 of the steel box girder 1 contacts and abuts against the bottom wall of the slot 311 and the second balls 312 remain in contact with the convex edge 11. At the same time, the movable seat 22 will move relative to the steel box girder 1 to a position centered along the width direction of the steel box girder 1, thus completing the positioning between the hoisting equipment and the steel box girder 1 and forming a connection relationship. Next, the connecting seat 21 is moved downward to its limit position, so that the movable seat 22 moves upward relative to the connecting seat 21 to its limit position; during this process, the four second locking pins 211 will be inserted into the corresponding four second locking slots 331 respectively, restricting the rotation of the four second take-up rollers 33 to prevent the second rope 32 from continuing to be released. Then, the four first drive units 44 are controlled to drive the four first take-up rollers 43 to rotate, causing the four first ropes 42 to be released outwards until the length of the first ropes 42 released is sufficient for the construction personnel to move the positioning structure 41 so that the four corners of the top of the steel box girder 1 can be engaged in the corresponding positioning grooves 4112. During this process, the construction personnel need to first determine the usage state of the main body 411 according to the thickness of the flange 11, and then use the main body 411 in the required position. After the corners of the top of the steel box girder 1 are engaged in the positioning grooves 4112, the support plate 412 at the bottom is rotated first, and it is controlled to rotate towards the positioning groove 4112 to the limit position, and then it is positioned by multiple bolts 413. Then, the air nozzle 415 at the top is used to position the spring at the top. The elastic pad 414 is inflated, so that the top corner of the steel box girder 1 is clamped and positioned between the upper elastic pad 414 and the lower support plate 412. Then, the rotating component 417 is controlled to rotate, so that the limiting groove 4171 is above the connecting component 416. Then, four first driving components 44 drive four first winding rollers 43 to rotate, so that four first ropes 42 are tightened until the first ropes 42 are taut. During this process, the connecting component 416 will be inserted into the corresponding limiting groove 4171, and the rotating component 417 will restrict its rotational freedom relative to the main body 411. At the same time, the extension 4161 will squeeze the elastic pads 414 on both sides of the steel box girder 1 and relax the elastic pad 414 at the top, thereby improving the relative positional stability of the positioning structure 41 and the top corner of the steel box girder 1. Finally, the control connecting seat 21 moves upward a certain distance until all four first ropes 42 are taut. During this process, the four first locking pins 222 will be inserted into the corresponding four first locking slots 431 respectively to restrict the rotation of the four first winding rollers 43 to prevent the first ropes 42 from continuing to be released, so as to ensure the safety and stability of the steel box girder 1 in the subsequent hoisting process. After that, the steel box girder 1 can be lifted, transported and installed using hoisting equipment.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hoisting equipment for the construction of a steel box girder bridge, characterized in that, It includes the body (2), the positioning device (4) and the stabilizing device (3); The body (2) includes a connecting seat (21) and a movable seat (22); the top of the connecting seat (21) is for connection with a hook, the movable seat (22) is located below the connecting seat (21), and the movable seat (22) and the connecting seat (21) are movably connected in the vertical direction; The positioning device (4) is disposed on the connecting seat (21), and includes four positioning components (40), which are respectively disposed at the four corners of the connecting seat (21); the positioning component (40) includes a positioning structure (41), a first rope (42), a first winding roller (43) and a first driving member (44); the first winding roller (43) is rotatably connected to the connecting seat (21), and the first driving member (44) is used to drive the first winding roller (43) to rotate; the positioning structure (41) is disposed on the outside of the connecting seat (21) and is used to be detachably connected to the corner of the steel box girder (1) for positioning; the two ends of the first rope (42) are respectively connected to the first winding roller (43) and the positioning structure (41); The stabilizing device (3) is disposed on the movable seat (22), and includes two stabilizing components (30), which are respectively disposed at both ends of the movable seat (22). The stabilizing component (30) includes a stabilizing member (31), and also includes a plurality of second ropes (32), a plurality of second take-up rollers (33), and a plurality of second driving members (34) corresponding to each other. The second take-up rollers (33) are rotatably connected to the movable seat (22), and the second driving members (34) are used to drive the second take-up rollers (33) to rotate. The stabilizing member (31) has a slot (311) for the side protrusion (11) of the top of the steel box girder (1) to be inserted. The two ends of the second ropes (32) are respectively connected to the second take-up rollers (33) and the stabilizing member (31). The movable seat (22) is provided with four first locking pins (222), and each of the four first take-up rollers (43) is provided with a first locking groove (431); the connecting seat (21) is provided with multiple second locking pins (211), and each of the multiple second take-up rollers (33) is provided with a second locking groove (331). When the movable seat (22) moves to its limit position in the direction close to the connecting seat (21), the second locking pin (211) engages with the second locking groove (331), and the rotation of the second take-up roller (33) is restricted; thereafter, after the movable seat (22) moves away from the connecting seat (21), the first locking pin (222) engages with the first locking groove (431), and the rotation of the first take-up roller (43) is restricted; During hoisting, the first locking pin (222) is inserted into the first locking groove (431), the movable seat (22) maintains a certain amount of movement relative to the connecting seat (21), and both the first rope (42) and the second rope (32) are taut.

2. The hoisting equipment for steel box girder bridge construction according to claim 1, characterized in that, The positioning structure (41) includes a main body (411), three support plates (412) and a connector (416). The main body (411) is composed of three plates (4111) that are spliced ​​together perpendicularly to each other. The length, width and height of the plates are different, and they form positioning grooves (4112) that are adapted to the top corners of the steel box girder (1). The three support plates (412) are respectively movably installed on the three plates (4111), and the support plates (412) are used to contact the bottom of the top corner of the steel box girder (1); The connector (416) is located on the outside of the main body (411), with one end close to the intersection of the three plates (4111) and the other end for the first rope (42) to connect.

3. The hoisting equipment for steel box girder bridge construction according to claim 2, characterized in that, The positioning structure (41) also includes a plurality of bolts (413) for fixing the support plate (412). The support plate (412) is rotatably connected to the side of the plate body (4111) away from the other plate bodies (4111), and the three support plates (412) are respectively disposed on both sides of the largest plate body (4111) and on the long side of the medium-sized plate body (4111). When the support plate (412) rotates to its limit position in the direction close to the positioning groove (4112), the support plate (412) is parallel to the plate body (4111) located above the top corner of the steel box girder (1), and the bolt (413) passes through the plate body (4111) and engages with its thread.

4. The hoisting equipment for steel box girder bridge construction according to claim 3, characterized in that, The positioning structure (41) also includes three elastic pads (414) that correspond one-to-one with the three plates (4111). The elastic pad (414) is disposed on the side of the plate (4111) near the positioning groove (4112) and is used to directly contact the corner of the steel box girder (1).

5. The hoisting equipment for steel box girder bridge construction according to claim 4, characterized in that, The elastic pad (414) has a cavity (4141) inside, and the plate (4111) is provided with a nozzle (415) for controlling the gas to enter and exit the cavity (4141).

6. The hoisting equipment for steel box girder bridge construction according to claim 5, characterized in that, The positioning structure (41) also includes a rotating component (417). The rotating component (417) is unidirectionally rotatable on the outside of the main body (411) and close to the intersection of the three plates (4111). Its rotation axis is equal to the angle between the outer side of the three plates (4111) and the rotational direction of the multiple rotating components (417) relative to the corresponding main body (411) is the same. One end of the connecting component (416) is ball-jointed with the rotating component (417), and the rotating component (417) is provided with a limiting groove (4171) for the connecting component (416) to be inserted.

7. The hoisting equipment for steel box girder bridge construction according to claim 6, characterized in that, The end of the connector (416) away from the first rope (42) is located in the positioning groove (4112) and is used to contact the three elastic pads (414); The three elastic pads (414) tend to drive the length direction of the connector (416) to be parallel to the axis of the rotating member (417). When the length direction of the connector (416) is inclined relative to the axis of the rotating member (417), the connector (416) compresses at least one of the elastic pads (414).

8. The hoisting equipment for steel box girder bridge construction according to claim 4, characterized in that, When all three support plates (412) are rotated to their limit positions toward the positioning groove (4112), the three support plates (412) respectively cover the three openings of the positioning groove (4112).

9. The hoisting equipment for steel box girder bridge construction according to claim 1, characterized in that, The bottom of the movable seat (22) is provided with a plurality of first rolling balls (221).

10. The hoisting equipment for steel box girder bridge construction according to claim 1, characterized in that, Multiple second rolling balls (312) are rolled on the stabilizing member (31). After the top of the steel box girder (1) is inserted into the slot (311), the second rolling balls (312) contact one side of the top of the steel box girder (1), and the second rope (32) tilts downward toward the stabilizing member (31).

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