Four-point uniform load hoisting structure of precast concrete block

Abstract

The utility model discloses a four point of prefabricated concrete block's even load hoisting structure, including a plurality of groups fixed setting on the hoisting ring of prefabricated concrete component, every group hoisting ring at least includes two, and the inside of every group hoisting ring is provided with a rigid link, and the rigid link passes through all hoisting rings of this group, and the middle part of rigid link is fixedly connected with one end of steel wire rope, and the other end of a plurality of steel wire ropes is concentrated in hoisting equipment lifting point. Both ends of rigid link are fixedly provided with end anti -slip device. Through the even load design of " multiple hoisting ring + rigid link", effectively disperses the concentrated load, and the safe lifting weight of single lifting point is doubled, and successfully breaks through the technical bottleneck of the hoisting of hundred tons class concrete component. The rigid link ensures that a plurality of hoisting rings are uniformly and synchronously stressed, and the end anti -slip device completely eliminates the risk of rod disengagement, and the structure is stressed explicitly, and the safety redundancy is high.

Description

Technical Field

[0001] This utility model relates to the field of building construction and heavy component hoisting technology, specifically a four-point load-equalizing hoisting structure for precast concrete blocks. Background Technology

[0002] In industrial building renovation and prefabricated construction, the application of large precast concrete equipment foundations, wall panels, beams, and columns is becoming increasingly widespread. In large-scale production line technical renovation or equipment upgrade projects in heavy industries such as metallurgy, mining, chemicals, and energy, the modification of core equipment and its concrete foundations is often involved. These equipment foundations are massive in volume and complex in structure, and these components are extremely heavy, often weighing tens or even hundreds of tons. Concrete has high compressive strength but low tensile strength. According to the current national standard "Code for Design of Concrete Structures" GB50010, the allowable bearing capacity of a single embedded lifting ring is very limited. For ultra-heavy components, the traditional solution is to increase the number of lifting points or use large, specialized balance beam lifting devices. Increasing the number of lifting points significantly increases the complexity of design and construction, and too many lifting points can easily lead to uneven stress distribution; while large, specialized lifting devices are bulky, heavy, and expensive, inconvenient to rent and transport, and have high requirements for construction site space, resulting in poor economic efficiency and applicability. Therefore, we propose a four-point load-sharing lifting structure for precast concrete blocks. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a four-point load-sharing hoisting structure for precast concrete blocks. Through the load-sharing design of "multiple lifting rings + rigid connecting rods", the concentrated load is effectively distributed, and the safe lifting capacity of a single lifting point is multiplied. This successfully breaks through the technical bottleneck of hoisting 100-ton concrete components and can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a four-point load-sharing hoisting structure for precast concrete blocks, comprising several sets of lifting rings fixedly installed on the precast concrete components, each set of lifting rings comprising at least two rings, and a rigid connecting rod passing through the inner side of each set of lifting rings, the rigid connecting rod passing through all the lifting rings in the set, the middle part of the rigid connecting rod being fixedly connected to one end of a steel wire rope, and the other ends of several steel wire ropes being concentrated at the lifting points of the hoisting equipment.

[0005] As a preferred technical solution of this utility model, the two ends of the rigid connecting rod are fixedly provided with end anti-slip devices.

[0006] As a preferred technical solution of this utility model, the rigid connecting rod is threaded at both ends, and the end anti-slip device is a nut and washer that mate with the thread.

[0007] As a preferred technical solution of this utility model, the rigid connecting rod has radial through holes processed at both ends, and the end anti-slip device is a cotter pin or stop pin inserted in the through hole.

[0008] As a preferred embodiment of this utility model, the rigid connecting rod is a common rod-shaped structure, and the end anti-slip device is a baffle fixed to both ends of the rigid connecting rod by plug welding.

[0009] As a preferred technical solution of this utility model, the rigid connecting rod is a low-carbon steel rod or a high-strength alloy steel rod made of HPB300 material.

[0010] As a preferred technical solution of this utility model, two sets of lifting rings are provided at four lifting points on the precast concrete component, and multiple lifting rings at the same lifting point are arranged in a straight line or in a rectangular arrangement.

[0011] As a preferred embodiment of this utility model, a pad is provided between the wire rope and the rigid connecting rod, and the pad is a rubber pad or a polymer material pad.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. By using a load-sharing design with "multiple lifting rings + rigid connecting rods", the concentrated load is effectively distributed, which increases the safe lifting capacity of a single lifting point by several times, successfully breaking through the technical bottleneck of lifting 100-ton concrete components.

[0014] 2. The rigid connecting rod ensures that multiple lifting rings are subjected to uniform and synchronous force, and the end anti-detachment device completely eliminates the risk of rod detachment. The structure has clear force distribution and high safety redundancy.

[0015] 3. The entire device is mainly composed of steel bars, lifting rings, standard parts (nuts, pins) and pads, etc. It is inexpensive, simple to process and manufacture, does not require investment in expensive large-scale special lifting equipment, and has low requirements for the construction site.

[0016] 4. No additional lifting points are needed, making the design and construction simpler and more convenient, and avoiding uneven stress caused by too many lifting points. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a top view of the structure of this utility model;

[0019] Figure 3 This is a partial side view of the structure of this utility model.

[0020] In the diagram: 1. Lifting ring, 2. Rigid connecting rod, 3. End anti-slip device, 4. Wire rope, 5. Lifting point of lifting equipment. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-3 This utility model provides a technical solution: a four-point load-sharing hoisting structure for precast concrete blocks, comprising several sets of lifting rings 1 fixedly installed at four lifting points on the precast concrete component. Each lifting point has at least two sets of lifting rings, and each set of lifting rings 1 includes at least two rings. A rigid connecting rod 2 passes through the inner side of each set of lifting rings 1, and the rigid connecting rod 2 passes through all the lifting rings 1 in that set. The middle of the rigid connecting rod 2 is fixedly connected to one end of a steel wire rope 4, and the other ends of several steel wire ropes 4 are concentrated at lifting points 5 of the hoisting equipment. Through the load-sharing design of "multiple lifting rings + rigid connecting rods," the concentrated load is effectively distributed, multiplying the safe lifting capacity of a single lifting point, successfully breaking through the technical bottleneck of hoisting hundred-ton-class concrete components. The overall structure is simple, the force distribution is clear, and it is safe and reliable. It does not require expensive and cumbersome special lifting equipment, has strong versatility, is easy to operate, and is highly economical and has great potential for widespread application.

[0023] In a preferred embodiment, the rigid connecting rod 2 is fixedly equipped with end anti-slip devices 3 at both ends. The end anti-slip devices 3 can effectively prevent the rigid connecting rod 2 from accidentally slipping off the lifting ring 1 during the hoisting process, greatly improving the safety and reliability of the hoisting process and eliminating major safety hazards.

[0024] Optionally, the rigid connecting rod 2 has threads machined at both ends, and the end anti-slip device 3 consists of a nut and a washer that mate with the threads, with the outer diameter of the nut being larger than the outer diameter of the lifting eye 1. The threaded connection method is simple in structure, easy to assemble and disassemble, and convenient for on-site construction and reuse. The washer increases the contact area, preventing the nut from damaging the lifting eye 1 or becoming too tight.

[0025] Optionally, the rigid connecting rod 2 has radial through holes machined at both ends, and the end anti-slip device 3 is a cotter pin or stop pin inserted into the through holes. The cotter pin or stop pin structure has extremely low cost and quick installation, and is a simple and effective anti-slip method, especially suitable for one-time hoisting or occasions where frequent disassembly is not required.

[0026] Optionally, the rigid connecting rod 2 is a common rod-shaped structure, and the end anti-slip device 3 is a baffle fixed to both ends of the rigid connecting rod 2 by plug welding. The welded baffle method provides strong anti-slip protection, has the most stable structure, eliminates concerns about thread stripping or pin detachment, and offers the highest safety.

[0027] In a preferred embodiment, the rigid connecting rod 2 is made of low-carbon steel bar or high-strength alloy steel bar of HPB300 material. HPB300 steel bar is low in cost and easy to process; high-strength alloy steel bar can provide higher load-bearing capacity and bending strength at the same diameter, allowing for the lifting of heavier components. The material can be flexibly selected according to the lifting requirements, balancing economy and performance.

[0028] Further optimized, the diameter d of the rigid connecting rod 2 is determined through mechanical strength calculations, requiring that its maximum bending stress during hoisting be less than the allowable stress of the material. In the actual project execution, a 72mm diameter steel rod was selected. One steel rod passes through two lifting rings 1, and the steel wire rope pulling the steel rod ensures that both lifting rings are simultaneously and evenly stressed. The diameter of the steel rod can be verified through material mechanics theory to control the overall stress level of the steel rod, ensuring that the rigid connecting rod itself has sufficient strength and stiffness, maintains shape stability during hoisting, and has minimal deformation, thereby reliably and evenly distributing the load to each lifting ring.

[0029] In the preferred technical solution, two sets of lifting rings 1 are set at four lifting points on the precast concrete component. Multiple lifting rings 1 at the same lifting point are arranged in a straight line or in a rectangle. The four-point lifting method ensures the stability of the lifting process. Each lifting point is equipped with two or four (four in a rectangle) lifting rings 1, which are coordinated by rigid connecting rods 2 to increase the theoretical bearing capacity of a single lifting point to 2-4 times the original, thereby successfully lifting ultra-heavy components weighing hundreds of tons.

[0030] An optional technical solution involves providing a pad between the wire rope 4 and the rigid connecting rod 2. The pad is a rubber pad or a polymer material pad. The pad protects the surfaces of the wire rope 4 and the rigid connecting rod 2 from mutual wear, extending their service life. Simultaneously, the pad increases friction, preventing the wire rope 4 from slipping relative to the rigid connecting rod 2 during lifting, ensuring the stability of force transmission.

[0031] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A four-point load-bearing hoisting structure for precast concrete blocks, characterized in that: It includes several sets of lifting rings (1) fixedly installed on precast concrete components. Each set of lifting rings (1) includes at least two rings. A rigid connecting rod (2) is passed through the inner side of each set of lifting rings (1). The rigid connecting rod (2) passes through all the lifting rings (1) in the set. The middle part of the rigid connecting rod (2) is fixedly connected to one end of the wire rope (4). The other ends of several wire ropes (4) are concentrated at the lifting point (5) of the lifting equipment.

2. The four-point load-sharing hoisting structure for precast concrete blocks according to claim 1, characterized in that: The rigid connecting rod (2) is fixedly provided with end anti-slip devices (3) at both ends.

3. The four-point load-sharing hoisting structure for precast concrete blocks according to claim 2, characterized in that: The rigid connecting rod (2) has threads at both ends, and the end anti-slip device (3) is a nut and washer that mate with the threads.

4. The four-point load-sharing hoisting structure for precast concrete blocks according to claim 2, characterized in that: The rigid connecting rod (2) has radial through holes at both ends, and the end anti-slip device (3) is a cotter pin or stop pin inserted in the through hole.

5. The four-point load-sharing hoisting structure for precast concrete blocks according to claim 2, characterized in that: The rigid connecting rod (2) is a common rod structure, and the end anti-slip device (3) is a baffle fixed to both ends of the rigid connecting rod (2) by plug welding.

6. The four-point load-sharing hoisting structure for precast concrete blocks according to claim 1, characterized in that: The rigid connecting rod (2) is a low-carbon steel rod or a high-strength alloy steel rod made of HPB300 material.

7. The four-point load-sharing hoisting structure for precast concrete blocks according to claim 1, characterized in that: The precast concrete component has two sets of lifting rings (1) at four lifting points, and multiple lifting rings (1) at the same lifting point are arranged in a straight line or in a rectangle.

8. The four-point load-sharing hoisting structure for precast concrete blocks according to claim 1, characterized in that: A pad is provided between the wire rope (4) and the rigid connecting rod (2), and the pad is a rubber pad or a polymer material pad.

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