Bridge steel box girder hoisting device

Abstract

The application belongs to the technical field of bridge construction equipment, and specifically relates to a bridge steel box girder hoisting device for hoisting a steel box; the device comprises a hoisting cross beam and a clamping assembly, the hoisting cross beam is in an I-beam structure, and two groups of lifting appliances are arranged on the two sides of the I-beam structure; the top surface of the clamping assembly is provided with four groups of connecting pieces, the four groups of lifting appliances are one-to-one corresponding to the four groups of connecting pieces, and the lifting appliances and the connecting pieces are detachably connected. The clamping assembly comprises a hoisting plate and a clamping plate, and the clamping plate is used for being hooked on the steel box. The position of the lifting appliance on the hoisting cross beam is adjusted, that is, the position of the lifting appliance on the hoisting cross beam is adjusted, the lifting appliance is aligned with the corresponding connecting piece, then the lifting appliance is quickly connected with the corresponding connecting piece, after the connection, the hoisting cross beam is lifted and moved, the hoisting of the steel box is realized, and the steel box is transferred to a specified position.

Description

Technical Field

[0001] This invention belongs to the technical field of bridge construction equipment, and in particular relates to a bridge steel box girder hoisting device. Background Technology

[0002] Reinforced concrete box girders are divided into precast box girders and cast-in-place box girders. Box girders precast on an independent site can be erected after the substructure is completed using a bridge erection machine, which can accelerate the project progress and save construction time. Cast-in-place box girders are mostly used for large continuous bridges. They are commonly classified by material into two main types: prestressed reinforced concrete box girders and steel box girders. Prestressed reinforced concrete box girders are constructed on-site, while steel box girders are generally prefabricated in a factory and then transported to the site for installation.

[0003] Traditional hoisting structures typically use hooks for lifting. This method leads to concentrated stress points on the steel box girder, which can easily cause deformation and even quality issues. To address these problems, the inventor found a bridge steel box girder hoisting device disclosed in patent document CN214783316U. This device includes a support frame with casters fixedly mounted at its bottom and a fixing plate fixedly mounted at its outermost bottom end. A threaded rod is connected to the fixing plate, and the bottom end of the rod is fixedly mounted with the support plate. A top plate is fixedly mounted at the top of the support frame, with a slide rail at its bottom. A screw rod is rotatably connected to the upper end of the support frame, and a sliding block is threadedly connected to the screw rod. The upper end of the sliding block slides along the slide rail, and a connecting plate is fixedly mounted at the lower end of the sliding block.

[0004] The above-mentioned method involves hoisting the steel box girder at multiple points. Multiple hooks are installed at each hoisting point on the top surface of the steel box girder. However, the stability is poor when the steel box girder hoisting device shakes. When the steel box girder hoisting device shakes, the steel cable is prone to detaching from the hook on the steel box girder hoisting device, causing the subsequent steel box girder splicing to fail, which poses a certain safety hazard. Summary of the Invention

[0005] The purpose of this invention is to provide a bridge steel box girder hoisting device, which aims to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A bridge steel box girder hoisting device for hoisting steel boxes; It includes a lifting beam and a clamping assembly. The lifting beam has an I-beam structure, and two sets of lifting devices are installed on each side of the I-beam structure. The top surface of the clamping assembly is equipped with four sets of connectors. The four sets of lifting devices correspond one-to-one with the four sets of connectors. The lifting devices and connectors are detachably connected. The clamping assembly includes a lifting plate and a clamping plate, the clamping plate being used to hook onto the steel box; The connector includes a connecting column, which is rotatably mounted on the lifting plate. The upper cross-section of the connecting column is racetrack-shaped. The connecting column has an arc surface structure and a flat surface structure. Several connecting slots are evenly spaced on the arc surface structure of the connecting column. The lifting device includes a movable seat, which is slidably mounted on the lifting beam. A first gear is rotatably mounted on the movable seat. The rotation of the first gear is driven by a forward and reverse servo motor. The first gear meshes with a fixed rack. Therefore, by using the forward and reverse servo motor to drive the first gear to rotate, the position of the movable seat on the lifting beam can be adjusted. A connecting sleeve is also fixedly installed on the movable seat. The connecting sleeve cooperates with the connecting column. A limit seat is fixedly provided on the outer wall of the bottom opening of the connecting sleeve. A limit block is slidably provided on the limit seat by a limit spring. The limit block cooperates with the connecting slot. With the inclined surface of the limiting block facing downwards, when the top of the connecting column extends into the connecting sleeve, the top of the connecting column first abuts against the inclined surface of the limiting block, and then pushes the limiting block to retract into the limiting seat. As the connecting sleeve continues to move downwards, that is, the connecting column extends into the connecting sleeve, until the limiting block abuts against the corresponding connecting slot, thus realizing a quick and fixed connection between the connecting column and the connecting sleeve.

[0008] In one embodiment of the present invention, a circular cavity is provided in the hoisting plate, and the bottom end of the connecting column slides into the circular cavity. A limiting toothed ring is fixedly installed on the bottom end of the connecting column located in the circular cavity. A limiting block that cooperates with the limiting toothed ring is also fixedly provided at the top of the circular cavity. When the limiting block is engaged in the tooth groove of the limiting toothed ring, the connecting column remains fixed and no longer rotates; conversely, when the limiting toothed ring disengages from the limiting block, the connecting column can rotate freely.

[0009] In one embodiment of the present invention, a square cavity is further provided in the inner cavity at the bottom of the connecting column, and a square slider is slidably disposed in the square cavity along the axial direction. The square slider is connected to the bottom of the square cavity by a support spring. A rotating support is fixedly installed on the square slider. The rotating support is coaxially disposed with the connecting column, and the bottom end of the rotating support is rotatably connected to the bottom surface of the circular cavity by a damping structure.

[0010] In one embodiment of the present invention, a turntable is also fixedly provided at the lower part of the connecting column, and multiple levers are evenly and fixedly provided on the outer circumference of the turntable. When the limiting toothed ring is disengaged from the limiting block, the connecting column can be rotated by a certain angle by operating the levers.

[0011] In one embodiment of the present invention, a fixing rack is fixedly provided on the bottom plate of the hoisting beam, and a plurality of limiting opening slots are also provided at equal intervals on the bottom plate of the hoisting beam.

[0012] In one embodiment of the present invention, a lifting slider is slidably provided inside the connecting sleeve by a connecting spring, and a lifting rack is fixedly connected to the lifting slider; a second gear is coaxially rotatably supported on the first gear, the second gear meshes with the lifting rack, the lifting rack is fixedly connected to the lifting slider, and a guide post is fixedly provided on the end face of the second gear. When the second gear rotates, it drives the guide post to perform circumferential motion.

[0013] In one embodiment of the present invention, a lifting frame is slidably mounted on one side of the connecting sleeve. The lifting frame is slidably mounted on the guide post, that is, when the guide post makes a circular motion, the lifting frame causes a vertical displacement. A limiting pin that cooperates with the limiting opening groove is fixedly installed on the lifting frame. The limiting pin is slidably mounted on an L-shaped support rod, and the L-shaped support rod also plays a guiding role in the up and down movement of the limiting pin. When the lifting frame moves down, it will drive the limiting pin to abut against the corresponding limiting opening groove, which can limit and fix the moving seat in the horizontal direction of the hoisting beam.

[0014] Compared with the prior art, the beneficial effects of the bridge steel box girder hoisting device of the present invention are: First, the present invention adjusts the position of the lifting device on the lifting beam, that is, adjusts the position of the lifting device on the lifting beam so that the lifting device is aligned with the corresponding connecting piece, and then quickly connects the lifting device with the corresponding connecting piece. After connection, the lifting beam is raised and moved to realize the lifting of the steel box and transfer the steel box to the designated position. Second, when the connecting column of the present invention extends into the connecting sleeve, it will push the lifting slider to move upward, thereby driving the lifting rack to move upward, so that the second gear rotates counterclockwise to push the lifting frame to move downward, and further limit and fix the moving seat along the horizontal direction of the lifting beam, ensuring that the lifting device will not move along the lifting beam at this time, so as to maintain a stable and reliable state when lifting the steel box. Third, after the steel box is placed in the designated position, as the lifting device continues to move downward, the connecting column will move down a small distance relative to the lifting plate. At this time, the limiting toothed ring will disengage from the limiting block. To achieve quick disassembly between the connecting sleeve and the connecting column, the connecting column can be rotated at a certain angle by operating the lever. That is, the planar structure of the connecting column is rotated to align with the limiting block. At this time, since the limiting block is pressed against the planar structure of the connecting column, the connecting sleeve can be easily removed from the connecting column by pulling it upward. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a bridge steel box girder hoisting device according to the present invention; Figure 2This is a front view of the bridge steel box girder hoisting device of the present invention; Figure 3 This is a schematic diagram of the movable seat of the bridge steel box girder hoisting device of the present invention after it has been opened. Figure 4 This is a schematic diagram of the lifting device for the bridge steel box girder hoisting apparatus of the present invention; Figure 5 This is a schematic diagram showing the cooperation between the lifting tools and connecting parts in the bridge steel box girder hoisting device of the present invention; Figure 6 This is a schematic diagram showing the cooperation between the connecting parts and the lifting plate in the bridge steel box girder hoisting device of the present invention; Figure 7 This is a schematic diagram of the internal structure of the connecting sleeve in the lifting device of the bridge steel box girder hoisting apparatus of the present invention; Figure 8 A partial exterior view of the connector provided by the present invention; Figure 9 This is a partial internal structural view of the connector provided by the present invention.

[0016] The attached figures are labeled as follows: 100. Lifting beam; 101. Fixing rack; 102. Limiting slot; 200. Clamping assembly; 201. Lifting plate; 202. Clamping plate; 203. Circular cavity; 204. Limiting block; 300. Steel box; 400. Lifting device; 401. Moving seat; 402. Connecting sleeve; 4021. Connecting spring; 4022. Lifting slider; 403. First gear; 404. Second gear; 405. Lifting frame; 406. Guide column; 407. Lifting rack; 408. Limit seat; 4081. Limit spring; 4082. Limit block; 409. Limit pin; 500, Connector; 501, Connecting post; 5011, Connecting slot; 5012, Square cavity; 5013, Square slider; 5014, Rotating support; 5015, Support spring; 5016, Limiting toothed ring; 502, Turntable. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0019] like Figures 1-3As shown, in one embodiment of the present invention, a bridge steel box girder hoisting device is provided, which is used to hoist a steel box 300. The bridge steel box girder hoisting device provided in this embodiment of the present invention includes a hoisting crossbeam 100 and a clamping assembly 200. The hoisting crossbeam 100 has an I-beam structure, and two sets of lifting devices 400 are provided on each side of the I-beam structure, thus forming four sets of lifting devices 400. The top surface of the clamping assembly 200 is provided with four sets of connecting parts 500. The four sets of lifting devices 400 correspond one-to-one with the four sets of connecting parts 500. The lifting devices 400 and the connecting parts 500 are detachably connected, allowing for quick connection between the lifting devices 400 and the connecting parts 500.

[0020] Furthermore, the clamping assembly 200 includes a lifting plate 201 and a clamping plate 202. The clamping plate 202 is used to hook onto the steel box 300. For example, the clamping plate 202 and the lifting plate 201 in the accompanying drawings are integrally formed. Of course, the clamping plate 202 can be detachably connected and installed on the lifting plate 201 so that the position of the clamping plate 202 can be adjusted as needed, thereby enabling the clamping assembly 200 to match steel boxes 300 of different sizes.

[0021] Please continue reading. Figure 2 and Figure 4 In this embodiment of the invention, a fixing rack 101 is fixedly provided on the bottom plate of the hoisting beam 100, and a plurality of limiting opening slots 102 are also provided at equal intervals on the bottom plate of the hoisting beam 100.

[0022] In the prior art, the clamping assembly 200 is directly hooked by a hook. Unlike the prior art, the present invention adjusts the position of the lifting device 400 on the lifting beam 100. That is, the position of the lifting device 400 on the lifting beam 100 is adjusted so that the lifting device 400 is aligned with the corresponding connector 500. Then, the lifting device 400 and the corresponding connector 500 are quickly connected. After connection, the lifting beam 100 is raised and moved to lift the steel box 300 and move the steel box 300 to the designated position.

[0023] Specifically, such as Figures 3-5In this embodiment of the invention, the connector 500 includes a connecting column 501, which is rotatably mounted on the lifting plate 201. The upper cross-section of the connecting column 501 is racetrack-shaped. The connecting column 501 has an arc surface structure and a planar structure. A plurality of connecting slots 5011 are evenly spaced on the arc surface structure of the connecting column 501. The lifting device 400 includes a movable seat 401, which is slidably mounted on the lifting beam 100. A first gear 403 is rotatably mounted on the movable seat 401. The rotation of the first gear 403 is driven by a forward and reverse servo motor (not shown in the figure). The first gear 403 meshes with a fixed rack 101. Therefore, by using the forward and reverse servo motor to drive the first gear 403 to rotate, the position of the movable seat 401 on the lifting beam 100 can be adjusted. Correspondingly, a connecting sleeve 402 is also fixedly installed on the movable seat 401. The connecting sleeve 402 cooperates with the connecting column 501. A limiting seat 408 is fixedly provided on the outer wall of the bottom opening of the connecting sleeve 402. A limiting block 4082 is slidably provided on the limiting seat 408 by a limiting spring 4081. The limiting block 4082 cooperates with the connecting groove 5011. Specifically, the inclined surface of the limiting block 4082 faces downward. When the top end of the connecting post 501 extends into the connecting sleeve 402, the top end of the connecting post 501 first abuts against the inclined surface of the limiting block 4082, and then pushes the limiting block 4082 to retract into the limiting seat 408. As the connecting sleeve 402 continues to move downward, that is, the connecting post 501 extends into the connecting sleeve 402, until the limiting block 4082 abuts against the corresponding connecting slot 5011, realizing a quick fixed connection between the connecting post 501 and the connecting sleeve 402.

[0024] Please continue reading. Figure 5 , Figure 6 , Figure 8 and Figure 9 In this embodiment of the invention, a circular cavity 203 is provided inside the hoisting plate 201. The bottom end of the connecting column 501 slides into the circular cavity 203. A limiting toothed ring 5016 is fixedly installed at the bottom end of the connecting column 501 located in the circular cavity 203. A limiting block 204 that cooperates with the limiting toothed ring 5016 is also fixedly provided at the top of the circular cavity 203. When the limiting block 204 is engaged in the tooth groove of the limiting toothed ring 5016, the connecting column 501 remains fixed and no longer rotates; conversely, when the limiting toothed ring 5016 disengages from the limiting block 204, the connecting column 501 can rotate freely. Furthermore, a square cavity 5012 is provided in the bottom inner cavity of the connecting column 501. A square slider 5013 is slidably arranged in the square cavity 5012 along the axial direction. The square slider 5013 is connected to the bottom of the square cavity 5012 by a support spring 5015. A rotating support column 5014 is fixedly installed on the square slider 5013. The rotating support column 5014 is coaxially arranged with the connecting column 501, and the bottom end of the rotating support column 5014 is rotatably connected to the bottom surface of the circular cavity 203 through a damping structure.

[0025] Furthermore, in this embodiment of the invention, a turntable 502 is fixedly provided at the lower part of the connecting post 501. Multiple levers are evenly distributed and fixedly provided on the outer circumference of the turntable 502. When the limiting toothed ring 5016 disengages from the limiting block 204, the connecting post 501 can be rotated by a certain angle by operating the levers.

[0026] Understandably, after the steel box 300 is placed in the designated position, as the lifting device 400 continues to move downward, the connecting column 501 will move down a small distance relative to the lifting plate 201. At this time, the limiting toothed ring 5016 will disengage from the limiting block 204. To achieve quick disassembly between the connecting sleeve 402 and the connecting column 501, the connecting column 501 can be rotated at a certain angle by operating the lever. That is, the planar structure of the connecting column 501 is rotated to align with the limiting block 4082. At this time, since the limiting block 4082 is pressed against the planar structure of the connecting column 501, the connecting sleeve 402 can be easily removed from the connecting column 501 by pulling it upward.

[0027] For further details, please refer to section 4. Figure 5 and Figure 7In this embodiment of the invention, a lifting slider 4022 is also slidably mounted inside the connecting sleeve 402 via a connecting spring 4021. A lifting rack 407 is fixedly connected to the lifting slider 4022. A second gear 404 is coaxially rotatably supported on the first gear 403. The second gear 404 meshes with the lifting rack 407, and the lifting rack 407 is fixedly connected to the lifting slider 4022. A guide post 406 is fixedly mounted on the end face of the second gear 404. When the second gear 404 rotates, it drives the guide post 406 to perform circular motion. A lifting mechanism is slidably mounted up and down on one side of the connecting sleeve 402. The lifting frame 405 is slidably sleeved on the guide column 406. When the guide column 406 performs circular motion, the lifting frame 405 will have a vertical displacement. A limiting pin 409 that cooperates with the limiting opening slot 102 is fixedly installed on the lifting frame 405. The limiting pin 409 is slidably sleeved on an L-shaped support rod, which also guides the up and down movement of the limiting pin 409. When the lifting frame 405 moves down, it will cause the limiting pin 409 to abut against the corresponding limiting opening slot 102, which can limit and fix the moving seat 401 in the horizontal direction along the hoisting beam 100.

[0028] It is understood that when the connecting column 501 of the present invention extends into the connecting sleeve 402, it will push the lifting slider 4022 to move upward, thereby driving the lifting rack 407 to move upward, so that the second gear 404 rotates counterclockwise to push the lifting frame 405 to move downward, and further limit and fix the moving seat 401 along the horizontal direction of the lifting beam 100, ensuring that the lifting device 400 will no longer move along the lifting beam 100 at this time, so as to maintain a stable and reliable state when lifting the steel box 300.

[0029] The above solutions are merely illustrative examples of preferred embodiments and are not intended to limit the scope of the invention. Appropriate substitutions and / or modifications can be made according to user needs when implementing this invention.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A bridge steel box girder hoisting device for hoisting steel boxes (300); Its features are: It includes a lifting beam (100) and a clamping assembly (200). The lifting beam (100) has an I-beam structure, and two sets of lifting devices (400) are provided on each side of the I-beam structure. The top surface of the clamping assembly (200) is provided with four sets of connectors (500). The four sets of lifting devices (400) correspond one-to-one with the four sets of connectors (500). The lifting devices (400) and the connectors (500) are detachably connected. The clamping assembly (200) includes a lifting plate (201) and a clamping plate (202), the clamping plate (202) being used to hook onto the steel box (300); The connector (500) includes a connecting column (501), which is rotatably mounted on the lifting plate (201). The upper cross section of the connecting column (501) is a racetrack-shaped structure. The connecting column (501) has an arc surface structure and a planar structure. Several connecting slots (5011) are evenly spaced on the arc surface structure of the connecting column (501). The lifting device (400) includes a movable seat (401), which is slidably mounted on the lifting beam (100). A first gear (403) is rotatably mounted on the movable seat (401). The rotation of the first gear (403) is driven by a forward and reverse servo motor. The first gear (403) meshes with a fixed rack (101). A connecting sleeve (402) is also fixedly installed on the movable seat (401). The connecting sleeve (402) cooperates with the connecting column (501). A limiting seat (408) is fixedly provided on the outer wall of the bottom opening of the connecting sleeve (402). A limiting block (4082) is slidably provided on the limiting seat (408) by a limiting spring (4081). The limiting block (4082) cooperates with the connecting slot (5011). The inclined surface of the limit block (4082) faces downward; A circular cavity (203) is provided inside the hoisting plate (201). The bottom end of the connecting column (501) slides into the circular cavity (203). A limiting toothed ring (5016) is fixedly installed at the bottom end of the connecting column (501) located in the circular cavity (203). A limiting block (204) that cooperates with the limiting toothed ring (5016) is also fixedly provided at the top of the circular cavity (203). A fixed rack (101) is fixedly installed on the bottom plate of the hoisting beam (100), and a number of limiting opening slots (102) are also equally spaced on the bottom plate of the hoisting beam (100). Inside the connecting sleeve (402), a lifting slider (4022) is also slidably mounted via a connecting spring (4021). A lifting rack (407) is fixedly connected to the lifting slider (4022). A second gear (404) is coaxially rotatably supported on the first gear (403). The second gear (404) meshes with the lifting rack (407), and the lifting rack (407) is fixedly connected to the lifting slider (4022). A guide post (40) is fixedly mounted on the end face of the second gear (404). 6) A lifting frame (405) is slidably installed on one side of the connecting sleeve (402), and the lifting frame (405) is slidably sleeved on the guide column (406); a limiting pin (409) that cooperates with the limiting opening groove (102) is fixedly installed on the lifting frame (405), and the limiting pin (409) is slidably sleeved on an L-shaped support rod; the limiting pin (409) abuts against the corresponding limiting opening groove (102) to limit and fix the moving seat (401) in the horizontal direction of the hoisting beam (100).

2. The bridge steel box girder hoisting device according to claim 1, characterized in that, A square cavity (5012) is also provided in the bottom inner cavity of the connecting column (501); A square slider (5013) is slidably disposed in the square cavity (5012) along the axial direction. The square slider (5013) is connected to the bottom of the square cavity (5012) by a support spring (5015). A rotating support column (5014) is fixedly installed on the square slider (5013). The rotating support column (5014) is coaxially disposed with the connecting column (501). The bottom end of the rotating support column (5014) is rotatably connected to the bottom surface of the circular cavity (203) through a damping structure.

3. The bridge steel box girder hoisting device according to claim 2, characterized in that, A turntable (502) is also fixedly installed at the lower part of the connecting column (501), and multiple levers are evenly distributed and fixedly installed on the outer circumference of the turntable (502).

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