A kind of adjustable lifting sling based on reinforcement cage for cast-in-place pile

Abstract

The utility model discloses a kind of adjustable hoisting spreader based on for bored pile reinforcement cage, including several steel wire ropes, including hanger, the hanger top surface annularly is uniformly distributed with several upper lifting lugs, the hanger bottom surface annularly is uniformly distributed with several lower lifting lugs, the several steel wire ropes include several lifting ropes one and several lifting ropes two, the lifting rope one is connected with corresponding upper lifting lug and is hung with lifting hook, the lifting rope two one end is connected with corresponding lower lifting lug and lifting rope two other end is connected with reinforcement cage. Using the device can greatly improve the safety in the process of reinforcement cage hoisting construction, while also make the quality of threaded connection construction to be guaranteed, improve construction quality, the device is simple to operate, low in cost, easy to carry out construction.

Description

Technical Field

[0001] This utility model relates to a lifting tool, and more particularly to an adjustable lifting tool for the reinforcement cage of bored cast-in-place piles. Background Technology

[0002] Currently, the reinforcing cages required for deep pile foundation construction need to be fabricated in sections, then lowered into the pile hole by crane. The main reinforcing bars on the two cages are then manually connected using connecting sleeves to form the reinforcing cage skeleton. Existing methods for hoisting reinforcing cages involve rope connections. The two ends of the rope are directly fixed to two opposite positions on the reinforcing cage, and the crane hook is used to lift it. Under gravity, the rope generates a huge tensile force, causing it to form an inverted V-shape. This results in the rope exerting not only a vertical force on the reinforcing cage but also a radial force. The radial force easily causes bending deformation of the reinforcing cage. Furthermore, this method makes it easy for the reinforcing cage to tilt during transport, making adjustment difficult. Inaccurate positioning between the upper and lower sections of the reinforcing cage is also impossible, hindering the connection of the connecting sleeves, affecting the connection effect, reducing the construction efficiency of the pile foundation, and lowering the quality of the pile foundation. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides an adjustable hoisting tool for the reinforcing cage of bored piles.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An adjustable lifting device for reinforcing cages of bored piles, comprising a plurality of wire ropes, characterized in that: it includes a lifting frame, the top surface of which is evenly distributed with a plurality of upper lifting lugs, the bottom surface of which is evenly distributed with a plurality of lower lifting lugs, the plurality of wire ropes including a plurality of first lifting ropes and a plurality of second lifting ropes, the first lifting ropes being connected to the corresponding upper lifting lugs and hooked to a lifting hook, one end of the second lifting ropes being connected to the corresponding lower lifting lugs and the other end of the second lifting ropes being connected to the reinforcing cage.

[0006] The hanger is cross-shaped.

[0007] The hanger is fixed with diagonal braces between two adjacent ends.

[0008] The hanger includes a main beam and secondary beams that are fixed to both sides of the main beam.

[0009] Both the main beam and the secondary beam are made of two channel steels fixed back to back.

[0010] It also includes several hanging plates, which are fixed between two corresponding channel steels, and the upper end of the hanging plate forms the upper lifting lug; and the lower end of the hanging plate forms the lower lifting lug.

[0011] The hanging plate is fixed between two corresponding channel steels by bolts.

[0012] The main beam and secondary beams are all equipped with stiffening plates.

[0013] Both sides of the upper and lower lifting lugs are provided with reinforcing plates, and both the upper and lower lifting lugs are provided with lifting holes that pass through the reinforcing plates.

[0014] An arc-guiding plate is provided at the connection between the main beam and the secondary beam.

[0015] The beneficial effects of this utility model are as follows: This utility model divides the wire rope into a first lifting rope and a second lifting rope. The first lifting rope connects the lifting frame and the hook; while the second lifting rope connects the rebar cage and the lifting frame. When the first lifting rope is taut into an inverted V shape by the hook, the second lifting rope can maintain its verticality better, thereby avoiding the generation of a large radial force that would cause the rebar cage to bend and deform. It also greatly reduces the problem of the rebar cage easily becoming skewed and difficult to adjust during the hoisting process. Moreover, the use of this device can greatly improve the safety of the rebar cage hoisting construction process, and at the same time ensure the quality of the threaded connection construction, thereby improving the construction quality. This device is simple to operate, low in cost, and easy to carry out construction. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a top view of the present invention;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a front view of the suspended platform.

[0020] Figure 4 This is a side view of the suspended platform.

[0021] Figure 5 This is a side view of the hanging plate and bolt connection. Detailed Implementation

[0022] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0023] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0024] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0025] When describing positional relationships, such as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0026] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0027] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0028] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0029] Reference Figures 1 to 5This utility model discloses an adjustable lifting device for reinforcing cages of bored piles, comprising several wire ropes (not shown in the figure), a lifting frame 1, preferably cross-shaped, with four upper lifting lugs 2 evenly distributed in a ring on the top surface and four lower lifting lugs 3 evenly distributed in a ring on the bottom surface. Thus, each end of the lifting frame 1 is provided with an upper lifting lug 2 and a lower lifting lug 3. The upper and lower lifting lugs 2 and 3 are conventional structures, each containing a circular lifting hole 4. Furthermore, the upper and lower lifting lugs 2 and 3 are evenly distributed in a ring around the center of the lifting frame 1 to achieve force balance. The wire ropes include two lifting ropes (first type) and four lifting ropes (second type). The end of each lifting rope (first type) is connected to a corresponding upper lifting lug 2. The two lifting ropes (first type) also form a cross structure. The hooks hook the two lifting ropes (first type) to lift the lifting frame 1. One end of each lifting rope (second type) is connected to a corresponding upper lifting lug 2. The lower lifting lug 3 is connected to the other end of the lifting rope 2, which is connected to the reinforcing cage. The distance between the two corresponding lower lifting lugs 3 corresponds to the diameter of the reinforcing cage. The reinforcing cage is also equipped with four evenly distributed ring-shaped lifting lugs. The distance between the two corresponding lifting lugs on the reinforcing cage is preferably equal to the distance between the lower lifting lugs 3. In this way, when the reinforcing cage is lifted, when the lifting rope 1 is taut into an inverted V shape by the action of the hook, the lifting rope 2 can maintain verticality better, thereby avoiding the generation of a large radial component force that would cause the reinforcing cage to bend and deform. Moreover, the swaying of the hook is not likely to directly affect the reinforcing cage below, thus greatly reducing the problem that the reinforcing cage is prone to tilting and adjustment is difficult during the lifting process. In addition, the use of this device can greatly improve the safety of the reinforcing cage lifting construction process, and at the same time ensure the quality of the threaded connection construction, thereby improving the construction quality. This device is simple to operate and easy to carry out construction.

[0030] As shown in the figure, diagonal braces 5 are fixed between two adjacent ends of the hanger 1. The two ends of the diagonal braces 5 are welded to the hanger 1, thereby improving the overall rigidity of the hanger 1. Specifically, the hanger 1 includes a main beam 6 and secondary beams 7 fixed to both sides of the main beam 6. The ends of the secondary beams 7 are welded to the main beam 6 to achieve a cross-shaped structure. In order to improve the strength and the stress balance of the structure, the main beam 6 and the secondary beams 7 are both made of two channel steels welded back to back. In this way, the main beam 6 and the secondary beams 7 are not only structurally symmetrical, but also have increased cross-sectional area, which improves the strength. As a further structural improvement, stiffening plates are provided in the main beam 6 and the secondary beams 7 to improve the structural strength. To further optimize the structure, arc-striking plates are provided at the connection between the main beam 6 and the secondary beams 7 for full-area welding.

[0031] As shown in the figure, it also includes several hanging plates 8, which are fixed between two corresponding channel steels. The upper end of the hanging plate 8 forms the upper lifting lug 2, and the lower end of the hanging plate 8 forms the lower lifting lug 3. The hanging plate 8 is fixed between the two corresponding channel steels by bolts 9. The hanging plate 8 is more secure and reliable by being connected and fixed by bolts 9. Moreover, the upper lifting lug 2 and the lower lifting lug 3 are integrated into one piece, which further improves reliability, balances the upper and lower tensions, and simplifies assembly. The hanging plate 8 is made of Q345 steel plate and is processed by cutting. The steel plate and bolts 9 are subjected to necessary heat treatment to ensure the strength of the hanging plate 8 and bolts 9.

[0032] As a further structural feature, both sides of the upper lifting lug 2 and the lower lifting lug 3 are provided with reinforcing plates 10, and both the upper lifting lug 2 and the lower lifting lug 3 are provided with lifting holes 4 that pass through the reinforcing plates 10, so as to avoid insufficient local stability at the weak points of the lifting plate 8 and the main and secondary beams 7.

[0033] The above provides a detailed description of an adjustable hoisting tool for reinforcing cages in bored piles, as provided in the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An adjustable lifting hoist based on a reinforcement cage for cast-in-place piles, comprising a number of steel wires, characterized in that: The system includes a hanger, with a plurality of upper lifting lugs evenly distributed in a ring on the top surface of the hanger and a plurality of lower lifting lugs evenly distributed in a ring on the bottom surface of the hanger. The plurality of wire ropes include a plurality of first lifting ropes and a plurality of second lifting ropes. The first lifting rope is connected to the corresponding upper lifting lug and hooked to the hook. One end of the second lifting rope is connected to the corresponding lower lifting lug and the other end of the second lifting rope is connected to the reinforcing cage.

2. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 1, characterized in that: The hanger is cross-shaped.

3. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 2, characterized in that: The hanger is fixed with diagonal braces between two adjacent ends.

4. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 2, characterized in that: The hanger includes a main beam and secondary beams fixed to both sides of the main beam. The main beam and the secondary beams are provided with upper and lower lifting lugs.

5. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 4, characterized in that: Both the main beam and the secondary beam are made of two channel steels fixed back to back.

6. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 5, characterized in that: It also includes several hanging plates, which are fixed between two corresponding channel steels, and the upper end of the hanging plate forms the upper lifting lug; and the lower end of the hanging plate forms the lower lifting lug.

7. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 6, characterized in that: The hanging plate is fixed between two corresponding channel steels by bolts.

8. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 5, characterized in that: The main beam and secondary beams are all equipped with stiffening plates.

9. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 6, characterized in that: Both sides of the upper and lower lifting lugs are provided with reinforcing plates, and both the upper and lower lifting lugs are provided with lifting holes that pass through the reinforcing plates.

10. The adjustable lifting device for lifting reinforcement cage of cast-in-place pile according to claim 4, characterized in that: An arc-guiding plate is provided at the connection between the main beam and the secondary beam.

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