Quick lifting appliance for precast beam

Abstract

The utility model discloses a precast beam quick lifting appliance which is characterized in that a support frame comprises two cross beams arranged at intervals, a longitudinal beam positioned between the two cross beams and a transverse moving mechanism for driving the two cross beams to be close to each other or far away from each other, the cross beams are provided with a plurality of through beam grooves, the longitudinal beam is inserted into the beam grooves and is connected with the beam grooves in a sliding manner, and the transverse moving mechanism is connected with the longitudinal beam. The cross beam is telescopically connected with the transverse moving mechanism; the hanging assembly comprises a translation mechanism sliding in the direction of the cross beam, a lifting chain connected to the translation mechanism, a lifting hook connected to the lifting chain and a lifting mechanism driving the lifting chain to vertically ascend or descend, the translation mechanism is connected to the outer side of the cross beam in a sleeving mode and is in sliding connection with the cross beam, and the lifting mechanism is located in the translation mechanism and is in transmission connection with the lifting chain. In the hoisting process, if the conditions of gravity center tilting, uneven stress and the like occur to the precast beam, the translation mechanism and the lifting mechanism can be further controlled to adjust the hoisting chain, so that the hoisting process is more stable, and the operation flexibility is higher.

Description

Technical Field

[0001] This utility model relates to the field of bridge lifting equipment technology, and in particular to a rapid lifting equipment for precast beams. Background Technology

[0002] Precast beams are manufactured in a factory and then transported to the construction site for installation and fixing according to the design requirements. In road and bridge construction, precast beams need to be hoisted. Steel wire ropes are threaded through pre-drilled holes in the precast beams and attached to the crane hook using a bottom-lifting method. As slender concrete components, precast beams have a large length-to-width ratio and are quite heavy, making them prone to uneven stress during hoisting, which can even cause cracking. If a dual-crane hoisting method is used, it is difficult to ensure synchronous operation of both cranes.

[0003] Patent No. ZL 202323109672.X discloses a lifting device for medium and large precast slabs and precast beams, including lifting chains and lifting beams. The lifting chains consist of several sets, with one end of each set fixedly connected. The lifting beams also consist of several sets, which are detachably connected. Several lifting holes are provided on the upper surface of each lifting beam, and the other end of the lifting chain connects to these holes. Several chain hooks for lifting precast slabs or beams are located near the lower end of each lifting beam. By connecting multiple chain hooks to the precast beams, the precast beams are divided into multiple segments, allowing for multi-point lifting and preventing uneven stress on the beams. Simultaneously, two lifting chains on the device are connected to lifting rings, ensuring the precast beams remain level during lifting, improving safety, and demonstrating promising application prospects. However, the solution mentioned in the aforementioned patent involves a fixed-point, fixed-length installation of the chain hook. There is a lack of adjustment devices for the chain hook. During the hoisting of the precast beam, if the precast beam experiences tilting of its center of gravity or uneven stress, the chain hook needs to be adjusted. This can only be done by lowering it back to the ground for readjustment, resulting in poor operational flexibility. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rapid lifting device for precast beams.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rapid lifting device for precast beams includes a horizontally arranged support frame and several hanging components connected to the support frame, characterized in that:

[0007] The support frame includes two spaced-apart crossbeams, a longitudinal beam located between the two crossbeams, and a transverse movement mechanism that drives the two crossbeams to move closer or further apart. The crossbeams are provided with several through-type beam slots, the longitudinal beams are inserted into the beam slots and are slidably connected to the beam slots, and the crossbeams are telescopically connected to the transverse movement mechanism.

[0008] The suspension assembly includes a translation mechanism that slides along the direction of the crossbeam, a suspension chain connected to the translation mechanism, a hook connected to the suspension chain, and a lifting mechanism that drives the suspension chain to rise or fall vertically. The translation mechanism is sleeved on the outside of the crossbeam and is slidably connected to the crossbeam. The lifting mechanism is located inside the translation mechanism and is connected to the suspension chain via a transmission.

[0009] Preferably, the transverse movement mechanism includes a central beam spaced equidistant from the crossbeam, a lead screw rotatably connected to the central beam, and a transverse movement motor connected to the lead screw. The central beam is connected to the midpoint of each longitudinal beam, and both ends of the lead screw are respectively connected to the crossbeam for transmission.

[0010] Preferably, the crossbeam has a through mounting hole, and a threaded sleeve matching the lead screw is inserted into the mounting hole. Each end of the threaded sleeve has a limiting plate that engages with the side wall of the crossbeam. The lead screw is inserted into the threaded sleeve and is connected to the threaded sleeve in a transmission manner.

[0011] Preferably, the translation mechanism includes a translation seat sleeved on the outside of the crossbeam, a roller located between the crossbeam and the translation seat, and a translation motor connected to the roller. The roller is rotatably connected to the translation seat and slidably connected to the crossbeam.

[0012] Preferably, the crossbeam has horizontally extending beam grooves on both sides, and the translation seat has guide pulleys embedded in the beam grooves on its inner side. The guide pulleys are rotatably connected to the translation seat and slidably connected to the beam grooves.

[0013] Preferably, the outer side of the translation seat is provided with a driven wheel coaxially connected to the roller, a driving wheel meshing with the driven wheel, and a protective shell covering the driving wheel and the driven wheel. The output end of the translation motor passes through the protective shell and is coaxially connected to the driving wheel.

[0014] Preferably, the lifting mechanism includes a sprocket for winding the chain and a lifting motor rotatably connected to the sprocket. The chain is arranged around the outside of the sprocket, and the bottom of the translation seat is provided with a chain groove for the chain to pass through. One end of the chain is connected to the sprocket, and the other end of the chain extends downward from the chain groove.

[0015] This utility model has the following beneficial effects:

[0016] This utility model provides multiple adjustment methods. First, based on the dimensions of the precast beam, the lifting point is selected, and fasteners are embedded in the precast beam. Then, the spacing of the crossbeams is adjusted using a horizontal movement mechanism, the position of the lifting chain is adjusted using a translation mechanism, and the length of the lifting chain is adjusted using a lifting mechanism to match the lifting point. Finally, the hook is connected to the fasteners of the precast beam, and the support frame is suspended by a crane to achieve the lifting of the precast beam. During the lifting process, if the precast beam experiences tilting of the center of gravity or uneven force, the translation and lifting mechanisms can be further controlled to adjust the lifting chain, making the lifting process more stable and the operation more flexible. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the precast beam rapid lifting device described in this utility model.

[0018] Figure 2 This is a schematic diagram of the support frame described in this utility model.

[0019] Figure 3 This is a schematic diagram of the translation mechanism described in this utility model.

[0020] Figure 4 This is a schematic diagram of the lifting mechanism described in this utility model.

[0021] Attached diagram descriptions: 1. Horizontal beam; 2. Longitudinal beam; 3. Lifting chain; 4. Hook; 5. Center beam; 6. Lead screw; 7. Horizontal movement motor; 8. Lead screw sleeve; 9. Translation seat; 10. Roller; 11. Translation motor; 12. Beam groove; 13. Guide pulley; 14. Driven wheel; 15. Drive wheel; 16. Protective shell; 17. Sprocket; 18. Lifting motor; 19. Chain groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1 to 4 One embodiment provided by this utility model:

[0024] A precast beam rapid lifting device includes a horizontally arranged support frame and several hanging assemblies connected to the support frame. The support frame includes two spaced-apart crossbeams 1, a longitudinal beam 2 located between the two crossbeams 1, and a transverse movement mechanism that drives the two crossbeams 1 to move closer or further apart. The crossbeams 1 are provided with several through-type beam grooves 12. The longitudinal beams 2 are inserted into the beam grooves 12 and are slidably connected to the beam grooves 12. The crossbeams 1 are telescopically connected to the transverse movement mechanism. The hanging assembly includes a translation mechanism that slides along the direction of the crossbeams 1, a lifting chain 3 connected to the translation mechanism, a hook 4 connected to the lifting chain 3, and a lifting mechanism that drives the lifting chain 3 to rise or fall vertically. The translation mechanism is sleeved on the outside of the crossbeams 1 and is slidably connected to the crossbeams 1. The lifting mechanism is located inside the translation mechanism and is drively connected to the lifting chain 3.

[0025] The support frame is horizontally positioned and connected to a crane at the top. The suspension assembly is vertically positioned and connected to a precast beam at the bottom. Two horizontal beams 1 are spaced apart, corresponding to the front and rear sides of the support frame, extending in the left-right direction. The horizontal beam 1 has an I-shaped structure, with a suspension lug at the top for connection to the crane, and a through beam groove 12 in the middle. The suspension lug and beam groove 12 are spaced apart along the direction of the horizontal beam 1. Several longitudinal beams 2 are spaced apart, symmetrically positioned on the left and right sides of the support frame, extending in the front-back direction. The longitudinal beams 2 connect between the two horizontal beams 1, with both ends of the longitudinal beams 2 inserted into the beam grooves 12 of the two horizontal beams 1 and slidably connected to the beam grooves 12, sliding in the front-back direction. The lateral movement mechanism is telescopically connected to the lateral movement mechanism and can be driven by a motor. Driven by the lateral movement mechanism, the two horizontal beams 1 move closer or further apart, thereby adjusting the distance between the two horizontal beams 1 and achieving adjustment of the lifting width.

[0026] The translation mechanism has a U-shaped structure, sleeved on the outside of the crossbeam 1, and slidably connected to the crossbeam 1. Several translation mechanisms are spaced apart and can be driven by a motor. The translation mechanisms slide along the crossbeam 1, thereby adjusting their horizontal position and achieving adjustment of the hoisting length. The lifting chain 3 extends downward, with one end connected to the translation mechanism and the other end connected to the hook 4. The lifting mechanism is located inside the translation mechanism, facing downward, and moves synchronously with the translation mechanism. The lifting mechanism is drive-connected to the lifting chain 3 and can be driven by a motor. Driven by the lifting mechanism, the lifting chain 3 rises or falls vertically, thereby adjusting the extension length of the lifting chain 3 and achieving adjustment of the hoisting height.

[0027] This utility model provides multiple adjustment methods. First, based on the dimensions of the precast beam, the lifting point is selected, and fasteners are embedded in the precast beam. Then, the spacing of the crossbeam 1 is adjusted using a horizontal movement mechanism, the position of the lifting chain 3 is adjusted using a translation mechanism, and the length of the lifting chain 3 is adjusted using a lifting mechanism to match the lifting point. Finally, the hook 4 is connected to the fasteners of the precast beam, and the support frame is suspended by a crane to achieve the lifting of the precast beam. During the lifting process, if the precast beam experiences tilting of the center of gravity or uneven force, the translation mechanism and lifting mechanism can be further controlled to adjust the lifting chain 3, making the lifting process more stable and the operation more flexible.

[0028] In this embodiment, preferably, the transverse movement mechanism includes a central beam 5 that is equidistant from the crossbeam 1, a lead screw 6 that is rotatably connected to the central beam 5, and a transverse movement motor 7 that is connected to the lead screw 6. The central beam 5 is connected to the midpoint of each longitudinal beam 2, and the two ends of the lead screw 6 are respectively connected to the crossbeam 1 for transmission.

[0029] A central beam 5 is located between two crossbeams 1, extending in the left-right direction and having the same length as the crossbeams 1. The central beam 5 and crossbeams 1 are evenly spaced, with the crossbeams 1 symmetrically positioned on the front and rear sides of the central beam 5. The central beam 5 may have a through-slot extending forward and backward, matching the shape and position of the beam groove 12. Longitudinal beams 2 pass through the through-slot and beam groove 12, and the central beam 5 connects to the midpoint of each longitudinal beam 2. The lead screw 6 is a bidirectional lead screw structure, with opposite external threads at both ends, respectively connected to the two crossbeams 1. The lead screw 6 is positioned in the front-back direction, rotatably connected to the central beam 5, and also connected to the transverse movement motor 7. Driven by the transverse movement motor 7, the motor rotates the lead screw 6, which in turn connects to the crossbeams 1, causing the crossbeams 1 to move along the direction of the lead screw 6, thus adjusting the distance between the two crossbeams 1.

[0030] In this embodiment, preferably, the crossbeam 1 is provided with a through mounting hole, and a threaded sleeve 8 matching the lead screw 6 is inserted into the mounting hole. The two ends of the threaded sleeve 8 are respectively provided with limiting plates that are engaged with the side wall of the crossbeam 1. The lead screw 6 is inserted into the threaded sleeve 8 and is connected to the threaded sleeve 8 in a transmission manner.

[0031] The mounting hole is located on the side wall of the crossbeam 1 and extends through it in the front-to-back direction. The threaded sleeve 8 is inserted into the mounting hole. Two limiting plates are located at both ends of the threaded sleeve 8, extending from the outer edge of the threaded sleeve 8. The crossbeam 1 is engaged between the two limiting plates to achieve a secure installation between the crossbeam 1 and the threaded sleeve 8. The threaded sleeve 8 is matched with the lead screw 6, which is inserted into the threaded sleeve 8 and is driven by the threaded sleeve 8. Driven by the transverse motor 7, the transverse motor 7 drives the lead screw 6 to rotate. The lead screw 6 is driven by the threaded sleeve 8, causing the crossbeam 1 to move along the direction of the lead screw 6.

[0032] In this embodiment, preferably, the translation mechanism includes a translation seat 9 sleeved on the outside of the crossbeam 1, a roller 10 located between the crossbeam 1 and the translation seat 9, and a translation motor 11 connected to the roller 10. The roller 10 is rotatably connected to the translation seat 9 and slidably connected to the crossbeam 1.

[0033] The translation seat 9 has a U-shaped structure, extending through the left and right sides, and is fitted onto the outside of the crossbeam 1. The roller 10 is located between the crossbeam 1 and the translation seat 9, and is connected to the translation motor 11. Alternatively, a placement cavity can be provided between the upper side of the crossbeam 1 and the translation seat 9, with the roller 10 located within the cavity and rotatably connected to the translation seat 9 via a rotating shaft. The roller 10 is also slidably connected to the upper side of the crossbeam 1. Driven by the translation motor 11, the translation motor 11 drives the roller 10 to rotate, and the roller 10 is slidably connected to the crossbeam 1, causing the translation seat 9 to move along the direction of the crossbeam 1, thereby adjusting the horizontal position of the translation mechanism.

[0034] In this embodiment, preferably, the beam 1 has horizontally extending beam grooves 12 on both sides, and the translation seat 9 has guide pulleys 13 embedded in the beam grooves 12 on its inner side. The guide pulleys 13 are rotatably connected to the translation seat 9 and slidably connected to the beam grooves 12.

[0035] The beam groove 12 is located on both sides of the crossbeam 1, extending horizontally towards the center of the crossbeam 1. The guide pulley 13 is located inside the translation seat 9 and is rotatably connected to it. The guide pulley 13 is embedded in the beam groove 12 and slidably connected to it, improving the stability of the roller 10's sliding and dispersing the load-bearing pressure on the roller 10. Simultaneously, the guide pulley 13 limits the translation seat 9 in the front-to-back direction, mitigating swaying during movement.

[0036] In this embodiment, preferably, the outer side of the translation seat 9 is provided with a driven wheel 14 coaxially connected to the roller 10, a driving wheel 15 meshing with the driven wheel 14, and a protective shell 16 covering the driving wheel 15 and the driven wheel 14. The output end of the translation motor 11 passes through the protective shell 16 and is coaxially connected to the driving wheel 15.

[0037] The protective shell 16 is located outside the translation base 9, and the driving wheel 15 and driven wheel 14 are located inside the protective shell 16. The driven wheel 14 is coaxially connected to the roller 10, and the driving wheel 15 is meshed with the driven wheel 14. The output end of the translation motor 11 passes through the protective shell 16 and is coaxially connected to the driving wheel 15. Driven by the translation motor 11, the translation motor 11 drives the driving wheel 15 to rotate, the driving wheel 15 drives the driven wheel 14 to rotate, and the driven wheel 14 drives the roller 10 to rotate. The roller 10 is slidably connected to the crossbeam 1, causing the translation base 9 to move along the direction of the crossbeam 1, thereby adjusting the horizontal position of the translation mechanism.

[0038] In this embodiment, preferably, the lifting mechanism includes a sprocket 17 for winding the chain 3 and a lifting motor 18 rotatably connected to the sprocket 17. The chain 3 is arranged around the outside of the sprocket 17. The bottom of the translation seat 9 is provided with a chain groove 19 for the chain 3 to pass through. One end of the chain 3 is connected to the sprocket 17, and the other end of the chain 3 extends downward from the chain groove 19.

[0039] The sprocket 17 is located inside the translation base 9 and is rotatably connected to it. The lifting chain 3 winds around the outside of the sprocket 17. The lifting motor 18 is rotatably connected to the sprocket 17 and can rewind the lifting chain 3. The chain groove 19 is located at the bottom of the translation base 9 and is vertically through-hole, allowing the lifting chain 3 to pass through. One end of the lifting chain 3 is connected to the sprocket 17, and the other end extends downward from the chain groove 19. Driven by the lifting motor 18, the lifting motor 18 drives the sprocket 17 to rotate, and the lifting chain 3 winds around the outside of the sprocket 17, thereby adjusting the extension length of the lifting chain 3.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid lifting device for precast beams, comprising a horizontally arranged support frame and a plurality of hanging components connected to the support frame, characterized in that: The support frame includes two spaced-apart crossbeams, a longitudinal beam located between the two crossbeams, and a transverse movement mechanism that drives the two crossbeams to move closer or further apart. The crossbeams are provided with several through-type beam slots, the longitudinal beams are inserted into the beam slots and are slidably connected to the beam slots, and the crossbeams are telescopically connected to the transverse movement mechanism. The suspension assembly includes a translation mechanism that slides along the direction of the crossbeam, a suspension chain connected to the translation mechanism, a hook connected to the suspension chain, and a lifting mechanism that drives the suspension chain to rise or fall vertically. The translation mechanism is sleeved on the outside of the crossbeam and is slidably connected to the crossbeam. The lifting mechanism is located inside the translation mechanism and is connected to the suspension chain via a transmission.

2. The precast beam rapid lifting device according to claim 1, characterized in that: The transverse movement mechanism includes a central beam that is equidistant from the crossbeam, a lead screw that is rotatably connected to the central beam, and a transverse movement motor connected to the lead screw. The central beam is connected to the midpoint of each longitudinal beam, and both ends of the lead screw are respectively connected to the crossbeam for transmission.

3. The precast beam rapid lifting device according to claim 2, characterized in that: The crossbeam is provided with a through mounting hole, and a threaded sleeve matching the lead screw is inserted into the mounting hole. Each end of the threaded sleeve is provided with a limiting plate that engages with the side wall of the crossbeam. The lead screw is inserted into the threaded sleeve and is connected to the threaded sleeve for transmission.

4. The rapid lifting device for precast beams according to claim 1, characterized in that: The translation mechanism includes a translation seat sleeved on the outside of the crossbeam, a roller located between the crossbeam and the translation seat, and a translation motor connected to the roller. The roller is rotatably connected to the translation seat and slidably connected to the crossbeam.

5. The rapid lifting device for precast beams according to claim 4, characterized in that: The crossbeam has horizontally extending beam grooves on both sides, and the inner side of the translation seat has guide pulleys embedded in the beam grooves. The guide pulleys are rotatably connected to the translation seat and slidably connected to the beam grooves.

6. The rapid lifting device for precast beams according to claim 5, characterized in that: The outer side of the translation seat is provided with a driven wheel coaxially connected to the roller, a driving wheel meshing with the driven wheel, and a protective shell covering the driving wheel and the driven wheel. The output end of the translation motor passes through the protective shell and is coaxially connected to the driving wheel.

7. The rapid lifting device for precast beams according to claim 4, characterized in that: The lifting mechanism includes a sprocket for winding the chain and a lifting motor rotatably connected to the sprocket. The chain is arranged around the outside of the sprocket, and the bottom of the translation seat is provided with a chain groove for the chain to pass through. One end of the chain is connected to the sprocket, and the other end of the chain extends downward from the chain groove.

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