A lifting device for precast composite slabs

Abstract

This utility model discloses a lifting device for precast composite slabs, including a balance beam with lifting lugs for connection to lifting equipment. A rotating shaft is located at the bottom of the balance beam, and at least two sleeves are fixedly connected to the shaft. Each sleeve includes a forward winding area and a reverse winding area distributed along its axial direction. Traction ropes are wound on both the forward and reverse winding areas. The traction ropes in the forward and reverse winding areas within the same sleeve have opposite winding directions. A hook is provided at the end of the traction rope furthest from the sleeve for hanging on the truss reinforcement bars on the composite slab. The hooks on the forward and reverse winding areas are used to hang on the truss reinforcement bars located on opposite sides of the balance beam, respectively. This utility model allows for adjustment of the lifting rope angle and control of the composite slab's rotation, making it convenient to use.

Description

Technical Field

[0001] This utility model relates to the technical field of lifting equipment for precast composite slabs, and specifically to a lifting device for precast composite slabs. Background Technology

[0002] Composite slabs are precast concrete components widely used in prefabricated buildings, consisting of a bottom precast concrete slab and an upper exposed truss steel reinforcement.

[0003] During the installation of composite slabs, due to their large size, thin thickness, and the need for precise positioning on the high-altitude formwork support, lifting equipment must be used for transportation and installation.

[0004] Existing lifting devices are not easy to control the angle of the slings during lifting, which can easily cause the composite slab to crack or the steel bars to deform. In addition, existing lifting devices are not easy to adjust the flipping angle of the composite slab. Utility Model Content

[0005] The purpose of this utility model is to provide a lifting device for precast composite slabs, which can adjust the angle of the slings and control the flipping of the composite slabs, and is easy to use.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0007] A lifting device for precast composite slabs includes a balance beam with lifting lugs for connection to a lifting device. A rotating shaft is located at the bottom of the balance beam, and at least two sleeves are fixedly connected to the shaft. Each sleeve includes a forward winding zone and a reverse winding zone distributed along its axial direction. Traction ropes are wound on both the forward and reverse winding zones. The traction ropes in the forward and reverse winding zones within the same sleeve have opposite winding directions. The end of each traction rope away from the sleeve has a hook for hooking onto the truss reinforcement bars on the composite slab. The hooks on the forward and reverse winding zones are used to hook onto the truss reinforcement bars located on opposite sides of the balance beam, respectively. Any existing lifting device can be used, and will not be elaborated upon. Its function is that, with all hooks hooked onto the truss reinforcement bars, when the shaft rotates, the traction ropes on the forward winding zones are released while the traction ropes on the reverse winding zones are retracted, thereby achieving the effect of flipping the composite slab.

[0008] Furthermore, multiple positioning bolt holes are evenly distributed along the axial direction on the side wall of the rotating shaft, and positioning bolts for threaded connection with the positioning bolt holes are provided through the side wall of the sleeve. The function is that, through the arrangement of the positioning bolt holes and positioning bolts, the fixed position of the sleeve on the rotating shaft can be adjusted according to the length of the laminated plate, making it suitable for laminated plates of different lengths.

[0009] Furthermore, both the forward and reverse winding zones are equipped with drums for fixed connection with the traction rope. The side walls of both zones have fixing bolt holes, and fixing bolts for threaded connection to these holes are threaded through the side walls of the drums. The traction rope is the sling connected to the composite slab. The connection between the traction rope and the drum is existing technology and will not be elaborated upon. Its function is that, through the fixing bolt holes and bolts, the drum can be fixed to the sleeve, and the length of the unwound wire on the drum can be adjusted by driving the drum. This allows adjustment of the sling angle between the traction rope and the truss reinforcement at the same position, thereby ensuring the structural strength of the composite slab during lifting.

[0010] Furthermore, the sleeve is provided with a partition in the middle to separate the forward winding area and the reverse winding area, and both ends of the sleeve are provided with limiting plates to prevent the drum from falling off.

[0011] Furthermore, the outer diameter of the partition is larger than the outer diameter of the drum, and the outer diameter of the limiting plate is also larger than the outer diameter of the drum. The length of the forward winding zone is the same as the length of the reverse winding zone, and the length of the forward winding zone is the same as the length of the drum. Its function is to confine the traction rope on the drum within the forward or reverse winding zone through the design of the dimensional relationship between the drum, partition, and limiting plate.

[0012] Furthermore, the limiting plate is threadedly connected to the mounting bolt hole on the end face of the sleeve via a mounting bolt that passes through the end face of the limiting plate. Its function is to enable the connection between the limiting plate and the sleeve through the mounting bolt and the mounting bolt hole.

[0013] Furthermore, the number of sleeves on the rotating shaft is even, and all sleeves are symmetrically arranged around the center of the rotating shaft. All hooks on the forward winding areas are connected to the truss reinforcement on the same side of the balance beam, and all hooks on the reverse winding areas are connected to the truss reinforcement on the same side of the balance beam. The traction ropes on all forward winding areas are wound in the same direction, and the traction ropes on all reverse winding areas are wound in opposite directions. This design, through the number of sleeves and their symmetrical distribution, ensures that the axial force on the composite plate from the rotating shaft is symmetrical and cancels each other out.

[0014] Furthermore, the balance beam is provided with at least two lifting lugs. The purpose of this is to facilitate maintaining the balance of the balance beam by designing the number of lifting lugs.

[0015] Furthermore, the balance beam is provided with a motor mounting plate for mounting a motor, and the mounting plate is provided with a motor for connecting to the rotating shaft.

[0016] Furthermore, the balance beam includes shaft mounting plates located at both ends of the balance beam, and bearings are provided between the shaft mounting plates and the shafts. The bearing arrangement between the shaft mounting plates and the shafts uses existing technology and will not be described in detail.

[0017] The beneficial effects of this utility model are:

[0018] 1. By setting up forward and reverse winding zones, when all hooks are attached to the truss reinforcement, when the shaft rotates, the traction rope in the forward winding zone releases the line while the traction rope in the reverse winding zone retracts the line, thereby achieving the effect of flipping the composite plate.

[0019] 2. By setting the positioning bolt holes and positioning bolts, the fixed position of the sleeve on the rotating shaft can be adjusted according to the length of the laminated plate, which is suitable for laminated plates of different lengths;

[0020] 3. By setting the fixing bolt holes and fixing bolts, the drum can be fixed on the sleeve, and the length of the line on the drum can be adjusted by driving the drum. This allows for adjustment of the sling angle between the traction rope and the truss reinforcement at the same position, thereby ensuring the structural strength of the composite slab during the lifting process. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of Example 1 (the traction rope and hook are not shown);

[0022] Figure 2 This is a cross-sectional view of the sleeve structure in Example 1 (the traction rope and hook are not shown);

[0023] Figure 3 This is a schematic diagram of the main structure when the composite plate is suspended in Example 1;

[0024] Figure 4 This is a top view of the structure when the composite plate is suspended in Example 1.

[0025] Reference numerals: 1. Balance beam; 2. Lifting lug; 3. Shaft; 4. Sleeve; 5. Forward winding zone; 6. Reverse winding zone; 7. Traction rope; 8. Hook; 9. Positioning bolt hole; 10. Positioning bolt; 11. Drum; 12. Fixing bolt hole; 13. Fixing bolt; 14. Partition plate; 15. Limiting plate; 16. Mounting bolt; 17. Mounting bolt hole; 18. Motor mounting plate; 19. Motor; 20. Shaft mounting plate. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0027] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model 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 utility model.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1

[0030] A lifting device for precast composite slabs, such as Figure 1 As shown, the system includes a balance beam 1, with lifting lugs 2 for connecting to lifting equipment. A rotating shaft 3 is located at the bottom of the balance beam 1, and at least two sleeves 4 are fixedly connected to the shaft 3. Each sleeve 4 includes a forward winding area 5 and a reverse winding area 6 distributed along its axial direction. Traction ropes 7 are wound on both the forward and reverse winding areas 5 and 6. The traction ropes 7 in the forward winding area 5 and the reverse winding area 6 within the same sleeve 4 have opposite winding directions. A hook 8 is provided at the end of the traction rope 7 away from the sleeve 4 for hanging on the truss reinforcement bars of the composite slab. The hooks 8 on the forward winding area 5 and the reverse winding area 6 are used to hang on the truss reinforcement bars located on opposite sides of the balance beam 1, respectively. Any existing technology can be used for the lifting equipment, and details are omitted. Its function is to achieve the effect of flipping the composite plate by setting the forward winding zone 5 and the reverse winding zone 6, when all the hooks 8 are hung on the truss steel bars, and the shaft 3 rotates, the traction rope 7 on the forward winding zone 5 releases the line while the traction rope 7 on the reverse winding zone 6 is pulled up.

[0031] Specifically, such as Figure 2As shown, multiple positioning bolt holes 9 are evenly distributed along the axial direction on the side wall of the rotating shaft 3, and positioning bolts 10 for threaded connection with the positioning bolt holes 9 are provided through the side wall of the sleeve 4. Their function is that, through the arrangement of the positioning bolt holes 9 and the positioning bolts 10, the fixed position of the sleeve 4 on the rotating shaft 3 can be adjusted according to the length of the laminated plate, making it suitable for laminated plates of different lengths.

[0032] Specifically, such as Figure 2 As shown, both the forward winding area 5 and the reverse winding area 6 are equipped with drums 11 for fixed connection with the traction rope 7. The side walls of both the forward winding area 5 and the reverse winding area 6 are provided with fixing bolt holes 12, and fixing bolts 13 for threaded connection with the fixing bolt holes 12 are passed through the side walls of the drums 11. The traction rope 7 is the sling connected to the composite slab. The connection between the traction rope 7 and the drum 11 is existing technology and will not be described in detail. Its function is that, through the fixing bolt holes 12 and the fixing bolts 13, the drum 11 can be fixed to the sleeve 4, and the length of the wire laid on the drum 11 can be adjusted by driving the drum 11, thereby adjusting the sling angle between the traction rope 7 and the truss reinforcement at the same position, thus ensuring the structural strength of the composite slab during the lifting process.

[0033] Specifically, such as Figure 2 As shown, the sleeve 4 has a partition 14 in the middle for separating the forward winding area 5 and the reverse winding area 6, and the sleeve 4 has a limiting plate 15 at both ends for preventing the drum 11 from falling off.

[0034] Specifically, such as Figure 2 As shown, the outer diameter of the partition 14 is larger than the outer diameter of the drum 11, and the outer diameter of the limiting plate 15 is also larger than the outer diameter of the drum 11. The length of the forward winding area 5 is the same as the length of the reverse winding area 6, and the length of the forward winding area 5 is the same as the length of the drum 11. Its function is that, through the design of the dimensional relationship between the drum 11, the partition 14, and the limiting plate 15, the traction rope 7 on the drum 11 can be confined within the forward winding area 5 or the reverse winding area 6.

[0035] Specifically, such as Figure 2 As shown, the limiting plate 15 is threadedly connected to the mounting bolt hole 17 on the end face of the sleeve 4 via a mounting bolt 16 that passes through the end face of the limiting plate 15. Its function is to achieve the connection between the limiting plate 15 and the sleeve 4 through the mounting bolt 16 and the mounting bolt hole 17.

[0036] Specifically, such as Figure 1 , Figure 3 , Figure 4As shown, the number of sleeves 4 on the rotating shaft 3 is even, and all sleeves 4 are symmetrically arranged around the center of the rotating shaft 3. All hooks 8 on the forward winding areas 5 are connected to the truss reinforcement on the same side of the balance beam 1, and all hooks 8 on the reverse winding areas 6 are connected to the truss reinforcement on the same side of the balance beam 1. The traction ropes 7 on all the forward winding areas 5 are wound in the same direction, and the traction ropes 7 on all the reverse winding areas 6 are wound in opposite directions. Its function is to ensure that the axial force on the composite plate from the rotating shaft 3 is symmetrical and cancels each other out through the design and symmetrical distribution of the number of sleeves 4.

[0037] Specifically, such as Figure 1 As shown, the balance beam 1 is provided with at least two lifting lugs 2. The function of these lugs 2 is to facilitate the maintenance of the balance of the balance beam 1 by designing the number of lifting lugs 2.

[0038] Specifically, such as Figure 1 As shown, the balance beam 1 is provided with a motor mounting plate 18 for mounting the motor 19, and the mounting plate is provided with a motor 19 for connecting to the rotating shaft 3.

[0039] Specifically, the balance beam 1 includes shaft mounting plates 20 located at both ends of the balance beam 1, and bearings are provided between the shaft mounting plates 20 and the shaft 3. The bearing arrangement between the shaft mounting plates 20 and the shaft 3 adopts existing technology and will not be described in detail.

[0040] The working principle of this embodiment is explained as follows: First, according to the lifting points of the truss reinforcement to be hung, rotate the drum to adjust the length of the drum's line, thereby adjusting the sling angle between the traction rope 7 and the composite plate. Then, screw the fixing bolt 13 through the through hole on the drum 11 into the fixing bolt hole 12 to fix the drum 11 onto the sleeve 4. Next, according to the lifting points of the truss reinforcement to be hung, move the sleeve 4. When the sleeve 4 reaches the corresponding position, screw the positioning bolt 10 through the through hole on the sleeve 4 into the positioning bolt hole 9 to align the sleeve. After fixing the cylinder 4, hooks 8 on the traction ropes 7 of all the forward winding areas 5 are hooked onto the corresponding lifting points on the left side of the balance beam 1, and hooks 8 on the traction ropes 7 of all the reverse winding areas 6 are hooked onto the corresponding lifting points on the right side of the balance beam 1. This completes the connection between the lifting equipment and the composite plate. Then, the lifting equipment is driven to lift the composite plate. When it is necessary to flip the composite plate, the drive motor 19 rotates forward or reverses, so that the forward winding area 5 retracts the wire while the reverse winding area 6 releases the wire, or so that the forward winding area 5 releases the wire while the reverse winding area 6 releases the wire.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A lifting device for precast composite slabs, characterized in that: The system includes a balance beam (1), which is provided with a lifting lug (2) for connecting to a lifting device. The balance beam (1) has a rotating shaft (3) at the bottom. At least two sleeves (4) are fixedly connected to the rotating shaft (3). The sleeve (4) includes a forward winding area (5) and a reverse winding area (6) distributed along the axial direction of the sleeve (4). Both the forward winding area (5) and the reverse winding area (6) are wound with traction ropes (7). The traction ropes (7) in the forward winding area (5) and the traction ropes (7) in the reverse winding area (6) of the same sleeve (4) have opposite winding directions. The end of the traction rope (7) away from the sleeve (4) is provided with a hook (8) for hanging on the truss reinforcement on the composite plate. The hooks (8) on the forward winding area (5) and the hooks (8) on the reverse winding area (6) are used to hang on the truss reinforcement located on opposite sides of the balance beam (1).

2. The lifting equipment for precast composite slabs according to claim 1, characterized in that: The rotating shaft (3) has a plurality of positioning bolt holes (9) evenly distributed along the axial direction on its side wall, and the sleeve (4) has a positioning bolt (10) for threaded connection with the positioning bolt holes (9) through its side wall.

3. The lifting equipment for precast composite slabs according to claim 2, characterized in that: Both the forward winding area (5) and the reverse winding area (6) are provided with a drum (11) for fixed connection with the traction rope (7). Both the forward winding area (5) and the reverse winding area (6) are provided with a fixing bolt hole (12) on the side wall. A fixing bolt (13) for threaded connection with the fixing bolt hole (12) is provided through the side wall of the drum (11).

4. The lifting equipment for precast composite slabs according to claim 3, characterized in that: The sleeve (4) is provided with a partition (14) in the middle to separate the forward winding area (5) and the reverse winding area (6), and the sleeve (4) is provided with a limiting plate (15) at both ends to prevent the drum (11) from falling off.

5. The lifting equipment for precast composite slabs according to claim 4, characterized in that: The outer diameter of the partition (14) is greater than the outer diameter of the drum (11), and the outer diameter of the limiting plate (15) is greater than the outer diameter of the drum (11).

6. The lifting equipment for precast composite slabs according to claim 4, characterized in that: The limiting plate (15) is threadedly connected to the mounting bolt hole (17) on the end face of the sleeve (4) by the mounting bolt (16) passing through the end face of the limiting plate (15).

7. The lifting equipment for precast composite slabs according to claim 1, characterized in that: The number of sleeves (4) on the shaft (3) is even. All sleeves (4) are arranged symmetrically around the middle of the shaft (3). All hooks (8) on the forward winding area (5) are connected to the truss reinforcement on the same side of the balance beam (1). All hooks (8) on the reverse winding area (6) are connected to the truss reinforcement on the same side of the balance beam (1).

8. The lifting equipment for precast composite slabs according to claim 1, characterized in that: The balance beam (1) is provided with at least two lugs (2).

9. The lifting equipment for precast composite slabs according to claim 1, characterized in that: The balance beam (1) is provided with a motor mounting plate (18) for mounting a motor (19), and the mounting plate is provided with a motor (19) for connecting to the rotating shaft (3).

10. The lifting equipment for precast composite slabs according to claim 1, characterized in that: The balance beam (1) includes a rotating shaft mounting plate (20) located at the front and rear ends of the balance beam (1), and a bearing is provided between the rotating shaft mounting plate (20) and the rotating shaft (3).

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