Bridge construction rapid lifting device

Abstract

The application discloses a bridge construction rapid lifting device, which comprises a counterweight, the top of the counterweight being connected with a hoist through a first steel wire rope; a plurality of lifting blocks, the top of each lifting block being connected with the hoist through a second steel wire rope; two mutually parallel sides of the lifting block being respectively abutted with the upper surface and the lower surface of the top plate of a steel box girder to be lifted, and the middle straight side being abutted with the circumferential edge of the top plate of the steel box girder to be lifted; a plurality of telescopic mechanisms, each telescopic mechanism connecting the lifting block with the counterweight; and a plurality of connecting mechanisms, the side edges of the lower parts of any two adjacent lifting blocks being connected through the connecting mechanisms. The bridge construction rapid lifting device has the advantages of simple structure, can lift the steel box girder on site, and can lift and transport the steel box girder to a construction point, so that the steel box girder does not need to be placed on a platform in advance or moved from the platform to the construction point after being hoisted into place, and the bridge construction rapid lifting device has high economic and practical values.

Description

Technical Field

[0001] This invention relates to the field of bridge construction equipment technology. More specifically, this invention relates to a rapid lifting device for bridge construction. Background Technology

[0002] During bridge construction, steel box girders need to be lifted to the construction point above the piers. Existing steel box girder lifting devices for bridge construction are often structurally complex. The steel box girder needs to be lifted and transported to the lifting device platform by a crane. After being lifted into place, other equipment is needed to move the steel box girder from the platform to the construction point, which increases the construction difficulty and prolongs the construction cycle. For example, the invention patent with authorization announcement number CN113233365B discloses a rapid lifting device for road and bridge construction, which includes a base, a placement platform, a fastening mechanism, a drive component, and a limiting component. In the above patent literature, the lifting device has a complex structure and high cost. In addition, during use, construction materials (such as steel box girders) need to be manually moved and placed on the placement platform, and then the construction materials are clamped by the fastening mechanism. After being lifted into place, other tools are needed to transport the construction materials on the placement platform to the construction point. The construction is cumbersome and time-consuming, resulting in poor practicality. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] Another objective of this invention is to provide a rapid lifting device for bridge construction. This device has a simple structure and can lift and transport steel box girders to the construction site on-site. It eliminates the need for additional tools and manpower to place the steel box girders on the platform in advance or to move them from the platform to the construction site after hoisting them into place. This device has high economic and practical value.

[0005] To achieve these objectives and other advantages according to the present invention, a rapid lifting device for bridge construction is provided, comprising:

[0006] The counterweight is located in the middle of the upper surface of the top plate of the steel box girder to be lifted, and the top of the counterweight is connected to the crane by the first wire rope.

[0007] Multiple lifting blocks are arranged circumferentially on the outer periphery of the top plate of the steel box girder to be lifted. The top of the lifting blocks is connected to the crane via a second steel wire rope. The vertical cross-section of each lifting block is a U-shaped structure. The opening of each lifting block faces the top plate of the steel box girder to be lifted. The two parallel sides of the lifting block abut against the upper and lower surfaces of the top plate of the steel box girder to be lifted, respectively. The straight edge in the middle abuts against the circumferential edge of the top plate of the steel box girder to be lifted.

[0008] Multiple telescopic mechanisms are provided, with one telescopic mechanism corresponding to each lifting block, and each telescopic mechanism connects the upper side of the corresponding lifting block to the counterweight block;

[0009] Multiple connecting mechanisms are used to connect the lower sides of any two adjacent lifting blocks.

[0010] Preferably, in the bridge construction rapid lifting device, each lifting block has a first air bladder on its inner wall that is connected to an air pump.

[0011] Preferably, in the bridge construction rapid lifting device, each first airbag is equipped with a suction cup that can be attached to the top plate of the steel box girder to be lifted.

[0012] Preferably, in the bridge construction rapid lifting device, each telescopic mechanism includes a screw connected to the upper side of the lifting block and a sleeve that is helically rotated at one end and sleeved outside the screw, the other end of the sleeve being rotatably connected to the counterweight; the rotation of the sleeve is driven by a drive mechanism.

[0013] Preferably, in the bridge construction rapid lifting device, the driving mechanism includes:

[0014] A motor housing is located above the counterweight, and a motor is installed inside the motor housing;

[0015] The upper end of the rotating shaft is connected to the output shaft of the motor, and the lower end is vertically downward and rotatably connected to the counterweight.

[0016] The first bevel gear is coaxially and fixedly sleeved on the rotating shaft;

[0017] Multiple second bevel gears are provided, with one second bevel gear coaxially fixed on a sleeve, and each second bevel gear meshing with the first bevel gear.

[0018] Preferably, the bridge construction rapid lifting device further includes multiple buffer mechanisms, with one buffer mechanism corresponding to each lifting block. Each buffer mechanism includes multiple buffer units located on the outer periphery of the lifting block. Any two adjacent buffer units on the same side are connected by a hinge. Each buffer unit includes:

[0019] A cylinder barrel is fixed on the outer periphery of the lifting block; a piston is installed inside the cylinder barrel; an air outlet is provided on the side of the cylinder barrel near the lifting block.

[0020] A buffer plate is located on the side of the cylinder barrel away from the lifting block; two adjacent buffer plates on the same side of the lifting block are connected by a hinge.

[0021] A spring, one end of which is connected to the side of the buffer plate near the lifting block, and the other end extends along the axial direction of the cylinder and is connected to the piston.

[0022] The second airbag is located on the side of the buffer plate away from the lifting block, and the second airbag is connected to the air outlet of the corresponding cylinder.

[0023] Preferably, the bridge construction rapid lifting device has a slot on the lower side of each lifting block;

[0024] Each connection mechanism includes:

[0025] A rope reel is located at the bottom of the lifting block;

[0026] The third wire rope is wound on the rope reel;

[0027] The locking block is located at the free end of the second wire rope. Any two connected lifting blocks are locked in the slot of the other lifting block by the locking block on one of the lifting blocks.

[0028] The present invention has at least the following beneficial effects: The bridge construction rapid lifting device provided by the present invention has a simple structure and low cost. During use, it can quickly load and unload the construction materials (steel box girders) to be lifted. At the same time, it can lift and hoist the steel box girders on the spot at the stacking location without the need for additional equipment to hoist the steel box girders onto the lifting device. After being lifted into place, it can be directly placed at the construction site without the need for additional equipment to remove the steel box girders from the lifting device. This realizes the rapid lifting of bridge construction materials and has high economic and practical value.

[0029] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the bridge construction rapid lifting device described in one technical solution of the present invention;

[0031] Figure 2 for Figure 1 A magnified view of part A in the image;

[0032] Figure 3 This is a top view of the bridge construction rapid lifting device described in another technical solution of the present invention;

[0033] Figure 4 for Figure 3 A magnified view of part B in the image.

[0034] Explanation of reference numerals in the attached drawings: 1-Steel box girder; 2-Counterweight block; 21-First steel wire rope; 3-Lifting block; 31-Second steel wire rope; 32-First airbag; 33-Suction cup; 34-Slot; 41-Sleeve; 42-Screw; 51-Rope winding disc; 52-Clamping block; 53-Third steel wire rope; 61-Motor box; 62-Motor; 63-Shaft; 64-First bevel gear; 65-Second bevel gear; 71-Cylinder; 72-Piston; 73-Buffer plate; 74-Spring; 75-Second airbag. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0036] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0037] It should be noted that, unless otherwise specified, the experimental methods described in the following implementation plan are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified.

[0038] In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] like Figures 1-4 As shown, the present invention provides a rapid lifting device for bridge construction, which includes:

[0040] Counterweight 2 is located in the middle of the upper surface of the top plate of the steel box girder 1 to be lifted, and the top of the counterweight is connected to the crane by the first wire rope 21.

[0041] Multiple lifting blocks 3 are arranged circumferentially on the outer periphery of the top plate of the steel box girder 1 to be lifted. The top of the lifting blocks 3 is connected to the hoist via a second steel wire rope 31. The vertical cross section of each lifting block 3 is a U-shaped structure. The opening of each lifting block 3 faces the top plate of the steel box girder 1 to be lifted. The two parallel sides of the lifting block 3 abut against the upper and lower surfaces of the top plate of the steel box girder 1 to be lifted, respectively. The straight edge in the middle abuts against the circumferential edge of the top plate of the steel box girder 1 to be lifted.

[0042] Multiple telescopic mechanisms are provided, with one telescopic mechanism corresponding to each lifting block 3, and each telescopic mechanism connects the upper side of the corresponding lifting block 3 to the counterweight block 2;

[0043] Multiple connecting mechanisms are used to connect the lower sides of any two adjacent lifting blocks 3.

[0044] In the above technical solution, the present invention provides a rapid lifting device for bridge construction, which is used for lifting and hoisting steel box girders in bridge construction. The lifting device includes a counterweight block placed in the middle of the upper surface of the top plate of the steel box girder. The counterweight block is connected to a crane via a first steel wire rope. Multiple lifting blocks are spaced apart around the top plate of the steel box girder. Each lifting block is connected to the crane via a second steel wire rope. The vertical cross-section of the lifting block is a U-shaped structure. Each lifting block covers the circumferential edge of the top plate of the steel box girder, that is, the opening of the U-shaped structure of the vertical cross-section of the lifting block faces the top plate of the steel box girder. The two parallel sides are horizontal and respectively aligned with the upper edge of the top plate of the steel box girder. The top and bottom surfaces abut against each other, and the middle side abuts against the circumferential edge of the top plate of the steel box girder. Each lifting block is connected to the counterweight block through a telescopic mechanism. During use, the length of the telescopic mechanism is adjusted so that the three sides of the vertical section of the lifting block abut against the top plate of the steel box girder (two parallel sides abut against the upper and lower surfaces of the top plate of the steel box girder respectively, and the middle side abuts against the circumferential edge of the top plate of the steel box girder). Thus, the top plate of the steel box girder is lifted up by multiple lifting blocks. The lower part of each lifting block is detachably connected by a connecting mechanism. The lower parts of multiple lifting blocks are interconnected to improve the stability of the lifting blocks in supporting the steel box girder.

[0045] like Figure 1 , 3 As shown, the horizontal cross-section of the top plate of the steel box girder commonly used in bridge construction is a rectangular structure. As a preferred technical solution, the present invention can set a lifting block at each of the four corners of the top plate of the steel box girder. The horizontal cross-section of each lifting block is a right-angled triangle and the vertical cross-section is U-shaped. Each lifting block is adapted to one corner of the top plate of the steel box girder. The counterweight is placed at the center of the upper surface of the top plate of the steel box girder. Each telescopic mechanism extends and retracts along the line connecting the hypotenuse of the horizontal cross-section of the lifting block and the counterweight, adjusting the distance between the lifting block and the counterweight, and adjusting the lifting block to a position where it clamps the top plate of the steel box girder at a right angle. Then, the lower parts of any two adjacent lifting blocks are connected by a connecting mechanism. As a preferred technical solution, the connecting mechanism extends along the length direction of each side of the rectangular structure of the horizontal cross-section of the top plate of the steel box girder.

[0046] Steel box girder (with) Figure 1 , 3 (The example shown is a rectangular steel box girder.) Lifting and hoisting operation:

[0047] Using a crane, the counterweight and four lifting blocks are hoisted onto the steel box girder to be lifted (the steel box girder is currently in its stacking location and does not need to be pre-lifted and transported). The counterweight is then moved downwards and placed at the center of the top surface of the steel box girder's top plate. Simultaneously, the four lifting blocks are pulled outwards to the outside of the four corners of the steel box girder's top plate (at this point, the four corners of the steel box girder are not yet covered). Then, the length of the telescopic mechanism is adjusted to move the four lifting blocks closer to the counterweight until the lifting blocks cover the corners of the steel box girder's top plate. Then, the lower parts of any two adjacent lifting blocks are connected by a connecting mechanism. The crane is then started to lift and hoist the steel box girder to the construction point where the bridge pier is located. It can be placed directly at the designated construction point without the need for additional equipment to remove the steel box girder. After it is placed in place, the connection relationship of the connecting mechanism is released. Then, by extending the telescopic mechanism, each lifting block is moved away from the counterweight block to a position where it does not interfere with the top plate of the steel box girder. Then, the crane is started to remove the counterweight block and the four lifting blocks to carry out the lifting and hoisting operation of the next steel box girder.

[0048] The bridge construction rapid lifting device provided by this invention has a simple structure and low cost. During use, it can quickly load and unload construction materials (steel box girders) to be lifted. At the same time, it can lift and hoist the steel box girders on-site at the stacking location without the need for additional equipment to hoist the steel box girders onto the lifting device. After being lifted into place, it can be directly placed at the construction site without the need for additional equipment to remove the steel box girders from the lifting device. This realizes the rapid lifting of bridge construction materials and has high economic and practical value.

[0049] In another technical solution, the rapid lifting device for bridge construction includes a first airbag on the inner wall of each lifting block, which is connected to an air pump. After the lifting block is adjusted to cover the top corner of the steel box girder, air is pumped into the first airbag. The first airbag fills the gap between the inner wall of the lifting block and the top corner of the steel box girder, ensuring a tight clamping fit between the lifting block and the top corner of the steel box girder, thus improving the clamping stability between the lifting block and the top plate of the steel box girder.

[0050] In another technical solution, the rapid lifting device for bridge construction includes a suction cup 33 on each first airbag 32 that can adhere to the top plate of the steel box girder to be lifted. The suction cups on the first airbags, which adhere to the top plate of the steel box girder, further enhance the connection strength between the lifting block and the top corner of the steel box girder.

[0051] In another technical solution, the bridge construction rapid lifting device includes a telescopic mechanism in which each telescopic mechanism comprises a screw 42 connected to the upper side of the lifting block 3 and a sleeve 41, one end of which is helically rotated and sleeved outside the screw 42. The other end of the sleeve 41 is rotatably connected to the counterweight block 2. The rotation of the sleeve 41 is driven by a drive mechanism. The telescopic mechanism with the screw and sleeve helically rotated connection structure is simple in structure, has low equipment cost, and its telescopic operation is simple and quick. The rotation of the sleeve is driven by a drive mechanism, improving the automation level of the equipment and reducing manual labor intensity.

[0052] In another technical solution, the bridge construction rapid lifting device includes a driving mechanism comprising:

[0053] A motor housing 61 is located above the counterweight 2, and a motor 62 is installed inside the motor housing 61;

[0054] The upper end of the rotating shaft 63 is connected to the output shaft of the motor 62, and the lower end is vertically downward and rotatably connected to the counterweight 2.

[0055] The first bevel gear 64 is coaxially fixedly sleeved on the rotating shaft 63;

[0056] Multiple second bevel gears 65 are coaxially fixedly sleeved on a sleeve 41, and each second bevel gear 65 meshes with the first bevel gear 64.

[0057] In the above technical solution, the present invention discloses the technical features of the specific structure of the drive mechanism. The drive mechanism includes a motor housing located above the counterweight, and a motor is encapsulated inside the motor housing. The output shaft of the motor extends vertically downward and is connected to the upper end of a rotating shaft rotatably mounted on the counterweight. A first bevel gear is fixedly sleeved on the rotating shaft, and a second bevel gear is fixedly sleeved on the other end of each sleeve. All the second bevel gears mesh with the first bevel gears. When the motor is started, the output shaft is driven to rotate, which in turn drives the rotating shaft to rotate, thereby driving the first bevel gears to rotate. The first bevel gears drive all the second bevel gears to rotate, thereby driving all the sleeves to rotate synchronously. This causes all the sleeves and their corresponding screws to extend or shorten synchronously, realizing the synchronous extension or shortening of all the telescopic mechanisms driven by the drive mechanism.

[0058] In another technical solution, the bridge construction rapid lifting device further includes multiple buffer mechanisms, with one buffer mechanism corresponding to each lifting block. Each buffer mechanism includes multiple buffer units located on the outer periphery of the lifting block. Any two adjacent buffer units on the same side are connected by a hinge. Each buffer unit includes:

[0059] A cylinder barrel 71 is fixed on the outer periphery of the lifting block 3; a piston 72 is provided inside the cylinder barrel 71; an air outlet is provided on the side of the cylinder barrel 71 near the lifting block 3;

[0060] A buffer plate 73 is located on the side of the cylinder barrel 71 away from the lifting block 3; two adjacent buffer plates 73 located on the same side of the lifting block 3 are connected by a hinge.

[0061] Spring 74, one end of which is connected to the side of the buffer plate 73 near the lifting block 3, and the other end extends along the axial direction of the cylinder 71 and is connected to the piston 72.

[0062] The second airbag 75 is located on the other side of the buffer plate 73 away from the lifting block 3, and the second airbag 75 is connected to the air outlet of the corresponding cylinder barrel 71.

[0063] In the above technical solution, the present invention further provides a buffer unit on the outer periphery of the lifting block. When the lifting device lifts and hoists the construction material (steel box girder) to a high altitude, multiple buffer units can eliminate the shaking and tilting of the building material (steel box girder) and counterweight block due to external force during the lifting process, ensuring the stability of the lifting process.

[0064] During the lifting process, when the construction material (steel box girder) is lifted to a high altitude, it will collide with other equipment on the construction site or be subject to varying degrees of wind interference. The impact force from external objects and wind forces cause the steel box girder and counterweight to sway. Multiple buffer units are located on the outer periphery of the lifting block, i.e., on the outer periphery of the entire lifting device. The buffer plate of each buffer unit is connected to the piston of the cylinder via a spring. External forces exert varying degrees of compressive force on the corresponding buffer plate. This compressive force is converted into displacement of the buffer plate relative to the cylinder, which is then consumed and converted into stored spring force. When the compressive force exceeds the sum of the moving force of the buffer plate and the spring force, [the pressure will decrease]. The piston is pushed within the cylinder to move closer to the lifting block, further eliminating the compressive force. Simultaneously, the piston's movement within the cylinder inflates the second air chamber. The gas filling the second air chamber not only dissipates the compressive force but also enhances the buffer performance of the buffer plate, providing expansion protection. Multiple buffer units are installed on each lifting block. The buffer plates of any two adjacent buffer units on the same side are connected by hinges, which disperses and dissipates the compressive force, minimizing the external force and reducing the swaying amplitude of the steel box girder and counterweight caused by external forces, thereby maximizing the stability of the lifting device in lifting and hoisting the steel box girder.

[0065] In another technical solution, the bridge construction rapid lifting device has a slot 34 on the lower side of each lifting block;

[0066] Each connection mechanism includes:

[0067] Rope reel 51 is located at the bottom of lifting block 3;

[0068] The third wire rope 53 is wound on the rope reel 51;

[0069] The locking block 52 is located at the free end of the second wire rope 53. Any two connected lifting blocks 3 can be locked in the slot 34 of the other lifting block by the locking block 52 on one lifting block.

[0070] In the above technical solution, the present invention discloses the specific structural features of the connecting mechanism. The connecting mechanism consists of a third steel wire rope and a locking block. The locking block is set with a slot on the lifting block. When the lifting block is adjusted to the position to cover the top corner of the top plate of the steel box girder, the locking block on one of the lifting blocks is pulled into the slot of the other lifting block. After the steel box girder is lifted and hoisted into place, the locking block is taken out from the slot. By rotating the winding reel, the third steel wire rope is contracted, and the locking block is returned to the bottom of the lifting block.

[0071] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0072] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. 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 illustrations shown and described herein.

Claims

1. A rapid lifting device for bridge construction, characterized in that, include: The counterweight is located in the middle of the upper surface of the top plate of the steel box girder to be lifted, and the top of the counterweight is connected to the crane by the first wire rope. Multiple lifting blocks are arranged circumferentially on the outer periphery of the top plate of the steel box girder to be lifted. The top of the lifting blocks is connected to the crane via a second steel wire rope. The vertical cross-section of each lifting block is a U-shaped structure. The opening of each lifting block faces the top plate of the steel box girder to be lifted. The two parallel sides of the lifting block abut against the upper and lower surfaces of the top plate of the steel box girder to be lifted, respectively. The straight edge in the middle abuts against the circumferential edge of the top plate of the steel box girder to be lifted. Multiple telescopic mechanisms are provided, with one telescopic mechanism corresponding to each lifting block, and each telescopic mechanism connects the upper side of the corresponding lifting block to the counterweight block; Multiple connecting mechanisms are used to connect the lower sides of any two adjacent lifting blocks. Multiple buffer mechanisms are provided, with one buffer mechanism corresponding to each lifting block. Each buffer mechanism includes multiple buffer units located on the outer periphery of the lifting block. Any two adjacent buffer units on the same side are connected by a hinge. Each buffer unit includes: A cylinder barrel is fixed on the outer periphery of the lifting block; a piston is installed inside the cylinder barrel; an air outlet is provided on the side of the cylinder barrel near the lifting block. A buffer plate is located on the side of the cylinder barrel away from the lifting block; two adjacent buffer plates on the same side of the lifting block are connected by a hinge. A spring, one end of which is connected to the side of the buffer plate near the lifting block, and the other end extends along the axial direction of the cylinder and is connected to the piston. The second airbag is located on the side of the buffer plate away from the lifting block, and the second airbag is connected to the air outlet of the corresponding cylinder.

2. The bridge construction rapid lifting device as described in claim 1, characterized in that, Each lifting block has a first air bladder on its inner wall that is connected to an air pump.

3. The rapid lifting device for bridge construction as described in claim 2, characterized in that, Each first airbag is equipped with a suction cup that can adhere to the top plate of the steel box girder to be lifted.

4. The rapid lifting device for bridge construction as described in claim 3, characterized in that, Each telescopic mechanism includes a screw connected to the upper side of the lifting block and a sleeve that is helically fitted around the outside of the screw at one end, with the other end of the sleeve rotatably connected to the counterweight; the rotation of the sleeve is driven by a drive mechanism.

5. The rapid lifting device for bridge construction as described in claim 4, characterized in that, The drive mechanism includes: A motor housing is located above the counterweight, and a motor is installed inside the motor housing; The upper end of the rotating shaft is connected to the output shaft of the motor, and the lower end is vertically downward and rotatably connected to the counterweight. The first bevel gear is coaxially and fixedly sleeved on the rotating shaft; Multiple second bevel gears are provided, with one second bevel gear coaxially fixed on a sleeve, and each second bevel gear meshing with the first bevel gear.

6. The rapid lifting device for bridge construction as described in claim 1, characterized in that, Each lifting block has a slot on its lower side; Each connection mechanism includes: A rope reel is located at the bottom of the lifting block; The third wire rope is wound on the rope reel; The locking block is located at the free end of the third wire rope. Any two connected lifting blocks are locked in the slot of the other lifting block by the locking block on one of the lifting blocks.

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