Sling tool

Abstract

The utility model provides a sling which comprises a trolley, an upper connecting piece, a lifting beam and a lifting rod, the trolley is arranged above the upper connecting piece and connected with the upper connecting piece through a steel wire rope, the lifting rod is connected between the upper connecting piece and the lifting beam, the two ends of the lifting rod are connected with the upper connecting piece and the end of the lifting beam respectively, and the lifting beam is connected with the lifting rod through a steel wire rope. And the two ends of the lifting beam are connected with lifting hooks for lifting through slings. The spiral pipe is adopted as the lifting beam, and the spiral pipe has good structural strength and anti-pressure capacity, so that the bearing capacity and stability of the lifting sling can be greatly improved, the lifting sling can be suitable for a gantry crane to carry out lifting and transferring of the steel box beam, and the transportation stability is high.

Description

Technical Field

[0001] This application relates to the field of bridge hoisting construction technology, and in particular to a sling. Background Technology

[0002] Steel box girders are a major component of steel structure bridges. Due to their massive size, large steel box girders face limitations in rail and road transport, necessitating water transport, typically using barges and ocean-going vessels. A common hoisting method involves using large cranes to directly attach steel wire ropes. However, because the hoisting wire ropes are at an angle to the girder, a small angle increases the stress on the hoisting hooks, leading to increased lateral shear force and localized stress in the girder. This significantly increases the risk of hook breakage and detachment, posing a substantial safety hazard. Utility Model Content

[0003] The purpose of this application is to provide a lifting sling that improves the load-bearing capacity and stability of steel box girder hoisting.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A lifting sling includes a trolley, an upper connector, a lifting beam, and a lifting rod. The trolley is positioned above the upper connector and connected to it via a wire rope. The lifting rod is connected between the upper connector and the lifting beam, with both ends of the lifting rod connected to the ends of the upper connector and the lifting beam, respectively. Both ends of the lifting beam are connected via slings to serve as lifting hooks.

[0006] Further configuration: The lifting beam includes a spiral tube.

[0007] Further configuration: A reinforcing steel plate is provided on the outer wall of the lifting beam, the reinforcing steel plate extends along the length direction of the spiral tube, and the side of the reinforcing steel plate along its length direction is connected to the spiral tube.

[0008] Further configuration: Multiple reinforcing steel plates are provided along the circumference of the spiral tube.

[0009] Further configuration: The two ends of the lifting beam are provided with connecting plates, and the connecting plates are connected to at least one set of the lifting hooks.

[0010] Further configuration: The hook and the connecting plate of the lifting beam are connected by a lifting rod or cable.

[0011] Further configuration: The upper connector includes a connecting rod, and the end of the connecting rod is provided with a connecting plate for connecting the wire rope and the boom.

[0012] Further configuration: The trolley, upper connector, boom, beam and hook are detachably connected.

[0013] Further configuration: The lifting slings are provided in two sets, namely an upper lifting sling and a lower lifting sling. The upper lifting sling includes two sets of trolleys, and the lower lifting sling includes one set of trolleys. The length of the upper connecting member of the upper lifting sling is greater than the length of the upper connecting member of the lower lifting sling.

[0014] Compared with existing technologies, the solution in this application has the following advantages:

[0015] 1. The lifting slings involved in this application mainly use spiral tubes as lifting beams. Spiral tubes have good structural strength and compressive strength, which can greatly improve the load-bearing capacity and stability of the lifting slings. They can also be used for gantry cranes to lift and transfer steel box girders, and have high transportation stability.

[0016] 2. In the slings involved in this application, by setting reinforcing steel plates on the outer side wall of the slings, the structural strength of the lifting beam can be further strengthened, thereby improving the load-bearing capacity of the slings.

[0017] 3. In the slings involved in this application, the trapezoidal structure formed by the connection of the upper connector, the lifting beam and the lifting rod can further enhance the structural strength of the slings and improve their load-bearing capacity.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of the upper lifting sling in one embodiment of the lifting slings of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the lower sling in one embodiment of the slings of this application;

[0022] Figure 3 This is a schematic diagram of the lifting beam in one embodiment of the lifting slings of this application;

[0023] Figure 4 This is a side view of the lifting beam in one embodiment of the lifting slings of this application;

[0024] Figure 5 This is a schematic diagram of the upper and lower slings in one embodiment of the slings of this application.

[0025] In the diagram, 1 is the trolley; 2 is the upper connecting piece; 21 is the second connecting plate; 3 is the lifting rod; 4 is the lifting beam; 41 is the reinforcing steel plate; 42 is the first connecting plate; 5 is the hook; 100 is the upper lifting sling; 101 is the upper trolley; 200 is the lower lifting sling; 201 is the lower trolley. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0027] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0028] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0029] It should be noted that the concepts of "first" and "second" mentioned in this invention are only used to distinguish between devices, modules or units, and are not intended to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they intended to limit the order or interdependence of the functions performed by these devices, modules or units.

[0030] Please combine Figures 1 to 4 This application relates to a lifting sling, comprising a trolley 1, an upper connecting member 2, a lifting beam 4, and a lifting rod 3. The trolley 1 is located above the upper connecting member 2 and connected to the main cable. The trolley 1 drives the lifting sling to move along the length of the main cable. The trolley 1 is connected to the upper connecting member 2 via a wire rope. The lifting rod 3 is connected between the upper connecting member 2 and the lifting beam 4. The ends of the lifting member 2 and the lifting beam 4 are connected by two lifting rods 3 respectively. Lifting hooks 5 are also connected to both ends of the lifting beam 4. Using the lifting sling of this application enables the lifting and loading of large-tonnage beam segments onto ships with high lifting stability, ensuring the stability of the steel box girder during lifting and transportation.

[0031] In this embodiment, the lifting beam 4 adopts a spiral tube. The spiral tube adopts a continuous spiral winding method, which makes the cross-sectional shape of the steel tube more regular and the wall thickness more uniform. Therefore, the spiral tube can still have good structural strength and rigidity while being lightweight. The spiral structure of the steel tube has good compressive strength and can adapt to various complex geological and environmental conditions. Therefore, the use of spiral tube as the lifting beam 4 in this embodiment can greatly improve the load-bearing and compressive strength of the lifting slings and realize the lifting and transportation of large-tonnage steel box girders.

[0032] Furthermore, a reinforcing steel plate 41 is provided on the outer wall of the lifting beam 4. The reinforcing steel plate 41 extends along the length of the spiral tube, and its side is connected to the spiral tube. Multiple reinforcing steel plates 41 are provided along the axial direction of the spiral tube. This application, by providing reinforcing steel plates 41 on the outer wall of the spiral tube, can further increase the circumferential strength of the lifting beam 4, making the spiral tube structurally stable under external pressure and less prone to deformation or breakage, thereby further improving the overall strength and lifting capacity of the slings. In addition, the reinforcing steel plate 41 not only enhances the mechanical properties of the spiral tube but also reduces the impact or compression that the spiral tube may experience during transportation and installation. By absorbing some of the impact force, the reinforcing steel plate 41 protects the spiral tube.

[0033] The lifting beam 4 has a first connecting plate 42 at both ends. The hook 5 is connected to the first connecting plate 42. Multiple sets of hooks 5 can be connected through the first connecting plate 42. The hook 5 and the first connecting plate 42 can be connected through the lifting rod 3 or the sling. Using multiple sets of hooks 5 to connect with the steel box beam can improve the connection strength between the lifting sling and the steel box beam. The lifting rod 3 or sling used to connect the hook 5 can be connected to the first connecting plate 42 through the shackle. Thus, different lifting rods 3 or slings can be replaced according to the lifting requirements, thereby improving the applicability of the lifting sling.

[0034] Meanwhile, the upper connecting member 2 of this application includes a connecting rod, and a second connecting plate 21 is also provided at both ends of the connecting rod. Both ends of the lifting rod 3, which connects the upper connecting member 2 and the lifting beam 4, are detachably connected to the second connecting plate 21 at the ends of the upper connecting member 2 and the lifting beam 4 through shackles, thereby facilitating assembly on the construction site and allowing for the replacement of different specifications of the lifting rod 3 according to different construction needs. The trolley 1 is used to connect the wire rope to the connecting rod, which is detachably connected to the end of the connecting rod through shackles. Therefore, the trolley 1, upper connecting member 2, lifting beam 4, and hook 5 of the lifting sling of this application can all be disassembled to each other for convenient transportation.

[0035] In addition, the slings of this application form a trapezoidal structure through the upper connector 2, the lifting beam 4 and the lifting rod 3. The trapezoid is an asymmetrical stable structure, and its compressive strength is greater than that of a common parallelogram structure, which can enhance the stability of the slings.

[0036] Depending on the specifications of the steel box girder to be lifted, multiple sets of lifting slings can be set along the longitudinal direction of the steel box girder for lifting operations. This application specifically describes the construction process of lifting a steel box girder using two sets of lifting slings.

[0037] Please combine Figure 1 , Figure 2 and Figure 5 The two sets of lifting slings in this embodiment are applicable to gantry cranes. The two sets of lifting slings are an upper lifting sling 100 and a lower lifting sling 200. The upper lifting sling 100 is equipped with two sets of upper trolleys 101, and the lower lifting sling 200 is equipped with one set of lower trolleys 201. The length of the upper connecting member 2 of the upper lifting sling 100 is greater than the length of the upper connecting member 2 of the lower lifting sling 200. Thus, the steel box girder is lifted and transported by three sets of trolleys 1. In the event of a deviation in the steel box girder, the upper trolley 101 and the lower trolley 201 can work together to balance the force during the lifting process of the steel box girder, so as to facilitate the adjustment of the aerial shape of the steel box girder and ensure the stability of the steel box girder lifting and transportation.

[0038] Furthermore, the two sets of lifting slings in this embodiment can work independently and can perform lifting operations simultaneously to accelerate the lifting process. At the same time, the two sets of lifting slings make the lifting operation more flexible, as the trolleys 1 of the two sets of slings can be controlled independently, offering high flexibility.

[0039] In summary, the lifting slings of this application mainly use spiral tubes as the lifting beam 4. Spiral tubes have good structural strength and compressive strength, which can greatly improve the load-bearing capacity and stability of the lifting slings. They are also suitable for gantry cranes for lifting and transporting steel box girders, and have high transportation stability.

[0040] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A lifting sling, characterized in that, The device includes a trolley, an upper connecting member, a lifting beam, and a lifting rod. The trolley is positioned above the upper connecting member and connected to it via a steel wire rope. The lifting rod is connected between the upper connecting member and the lifting beam, with both ends of the lifting rod connected to the ends of the upper connecting member and the lifting beam, respectively. Both ends of the lifting beam are connected by slings to serve as lifting hooks.

2. The slings according to claim 1, characterized in that, The lifting beam includes a spiral tube.

3. The slings according to claim 2, characterized in that, The outer wall of the lifting beam is provided with a reinforcing steel plate, which extends along the length of the spiral tube and is connected to the spiral tube along its side along its length.

4. The slings according to claim 3, characterized in that, Multiple reinforcing steel plates are provided along the circumference of the spiral tube.

5. The slings according to claim 1, characterized in that, The lifting beam is provided with connecting plates at both ends, and each connecting plate is connected to at least one set of lifting hooks.

6. The slings according to claim 5, characterized in that, The hook is connected to the connecting plate of the lifting beam by a lifting rod or cable.

7. The slings according to claim 1, characterized in that, The upper connector includes a connecting rod, the end of which is provided with a connecting plate for connecting the wire rope and the boom.

8. The slings according to claim 1, characterized in that, The trolley, upper connector, boom, beam and hook are detachably connected.

9. The slings according to claim 1, characterized in that, The lifting slings are provided in two sets, namely an upper lifting sling and a lower lifting sling. The upper lifting sling includes two sets of trolleys, and the lower lifting sling includes one set of trolleys. The length of the upper connecting member of the upper lifting sling is greater than the length of the upper connecting member of the lower lifting sling.

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