spreader

Abstract

The present invention provides a sling, which relates to the technical field of lifting construction. The sling of the present invention is used to connect the lifting equipment and the object to be lifted, and includes: a main beam and a plurality of sub-beams. The main beam is used to connect with the lifting equipment, and all the sub-beams are arranged on the main beam at intervals, and any two adjacent sub-beams can be close to or away from each other. A plurality of retractable first slings are arranged on each sub-beam at intervals. When in use, the main beam is connected to the hook of the lifting equipment, and then the position of the calculated center of gravity of the object to be lifted is obtained according to the structure of the object to be lifted, and the position of the lifting lug on the object to be lifted is determined, and the appropriate first sling on the sub-beam is selected and connected to the lifting lug on the object to be lifted. After the connection is completed, the operator conducts a trial lift of the object to be lifted and adjusts the length of the first sling so that the hook of the lifting equipment and the calculated center of gravity of the object to be lifted are on the same vertical line. Compared with the existing technology, there is no need to design the sling before the lifting operation, which reduces the construction cost.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting construction, in particular to a lifting device. Background Art

[0002] In large-scale construction projects, such as the development of mines and oil and gas fields, or the construction of steel, petroleum, and chemical industries, and the manufacture of large equipment, there are a large number of objects that need to be lifted and hoisted.

[0003] Since the center of gravity and the location of the lifting points vary from object to object, before the lifting operation, it is necessary to calculate and plan according to the center of gravity of the actual hoisted object, select the appropriate lifting point, design a dedicated lifting device based on the lifting point, and equip the appropriate lifting rope. After the lifting device design is completed, before the actual construction, a trial lift must be carried out using the designed lifting device. During the trial lift, if it is found that the lifting rope is unevenly stressed, the center of gravity of the hoisted object is unstable, or the horizontality exceeds the standard, the lifting must be stopped and adjusted using a hand hoist, adjustable pull rod, etc. The process is greatly affected by the operator's experience and ability, and multiple trial lifts may be required for verification.

[0004] Therefore, during hoisting operations in existing large-scale construction projects, dedicated hoists need to be designed for different objects, resulting in high construction costs and high hoisting risks. Summary of the Invention

[0005] (1) The problem to be solved by the present invention is that in existing large-scale construction projects, special hoists need to be designed for different objects, resulting in high construction costs.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, an embodiment of the present invention provides a sling for connecting a lifting device and an object to be lifted, comprising: a main beam and a plurality of secondary beams;

[0008] The main beam is used to connect with the lifting equipment, all the auxiliary beams are arranged on the main beam at intervals, and any two adjacent auxiliary beams can be close to or away from each other;

[0009] A plurality of first slings are arranged at intervals on each of the auxiliary beams. The first slings are retractable, and one end of the first sling away from the auxiliary beam is provided with a connector for connecting to the object to be lifted.

[0010] Furthermore, a first slide rail is provided on the main beam, and a first roller group cooperating with the first slide rail is provided on each of the secondary beams;

[0011] The auxiliary beam is slidably connected to the first slide rail via the first roller set.

[0012] Furthermore, the sling further comprises a first telescopic member;

[0013] The first telescopic member has a first fixed end and a first telescopic end, the first fixed end is arranged on the main beam, and the first telescopic end is connected to the first roller group.

[0014] Furthermore, the sling further comprises a second telescopic member, the second telescopic member corresponding one-to-one to the first sling;

[0015] The second telescopic member has a second fixed end and a second telescopic end, the second fixed end is connected to the sub-beam, and the second telescopic end is connected to the first sling.

[0016] Furthermore, a second slide rail is provided on the secondary beam, and a second roller assembly is provided on one end of each of the first slings away from the connecting member;

[0017] The first sling is slidably connected to the second slide rail via the second roller set.

[0018] Furthermore, the second slide rail is arranged perpendicular to the first slide rail.

[0019] Furthermore, the sling further includes a third telescopic member;

[0020] The third telescopic member has a third fixed end and a third telescopic end, the third fixed end is arranged on the sub-beam, and the third telescopic end is connected to the second roller group.

[0021] Furthermore, the sling further comprises a plurality of second slings;

[0022] The main beam is provided with a plurality of lifting points, each of which corresponds to the second slings one by one, and all of the lifting points are sequentially connected to form a pattern, the center of the pattern coincides with the center of the main beam;

[0023] The second sling is retractable, one end of the second sling is connected to the lifting equipment, and the other end is connected to the lifting point.

[0024] Furthermore, the sling further comprises a plurality of fourth telescopic members, and the fourth telescopic members correspond one-to-one to the second slings;

[0025] The second sling includes a first section and a second section, and the fourth telescopic member has a fourth fixed end and a fourth telescopic end;

[0026] One end of the first section is connected to the lifting equipment, and the other end is connected to the fourth fixed end; one end of the second section is connected to the fourth telescopic end, and the other end is connected to the lifting point.

[0027] Furthermore, a hydraulic pump station is provided on the main beam;

[0028] The first telescopic member, the second telescopic member, the third telescopic member and the fourth telescopic member are all oil cylinders, and the first telescopic end, the second telescopic end, the third telescopic end and the fourth telescopic end are all connected to the hydraulic pump station through pipelines.

[0029] Beneficial effects of the present invention:

[0030] An embodiment of the present invention provides a sling for connecting a lifting device to an object to be lifted, comprising: a main beam and multiple sub-beams. The main beam is configured to connect to the lifting device, and all of the sub-beams are spaced apart on the main beam, with any two adjacent sub-beams being able to move closer or further away from each other. Multiple first slings are spaced apart on each sub-beam, and the first slings are retractably arranged. A connector for connecting to the object to be lifted is provided at one end of the first sling remote from the sub-beam. When using the sling provided in this embodiment, the main beam is connected to the hook of the lifting device. The calculated center of gravity of the object to be lifted is then determined based on the structure of the object to be lifted, and the position of the lifting lugs on the object to be lifted is determined. The position of the sub-beams is adjusted based on the position of the lifting lugs on the object to be lifted, and a suitable first sling on the sub-beam is selected and connected to the lifting lugs on the object to be lifted. After the connection is complete, an operator performs a test lift on the object to be lifted, adjusting the length of the first slings to ensure that the calculated center of gravity of the lifting device hook and the object to be lifted are on the same vertical line. Compared with the existing technology, there is no need to design lifting equipment before each lifting operation, which reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic structural diagram of a sling provided in an embodiment of the present invention.

[0033] Icons: 11-main beam; 111-first slide rail; 112-lifting point; 12-secondary beam; 121-first roller assembly; 122-second slide rail; 13-first sling; 131-second roller assembly; 14-first telescopic member; 15-second telescopic member; 16-third telescopic member; 17-fourth telescopic member; 18-second sling; 181-first section; 182-second section; 19-hydraulic pump station;

[0034] 2- Object to be lifted. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that in the description of the present invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] It should be noted that, in the description of the present invention, the terms "connect" and "install" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can be directly connected or connected through an intermediate medium; and they can be mechanically connected or electrically connected. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0038] like Figure 1 As shown, one embodiment of the present invention provides a sling for connecting a lifting device to an object 2 to be lifted. The lifting device can be a wheeled crane, crawler crane, or the like. The object to be lifted can be a large tank, pier, or the like. During construction, the sling is connected to the object 2 to be lifted, and then the sling is connected to the hook of the lifting device. The lifting device then lifts the object 2 via the sling.

[0039] The sling provided in an embodiment of the present invention includes: a main beam 11 and multiple sub-beams 12. The main beam 11 is used to connect to the lifting equipment. All the sub-beams 12 are spaced apart on the main beam 11, and any two adjacent sub-beams 12 can move closer to or farther away from each other on the main beam 11. Each sub-beam 12 is spaced apart and has multiple first slings 13 arranged retractably. The ends of the first slings 13 away from the sub-beam 12 are provided with connectors for connecting to the object 2 to be lifted.

[0040] In this embodiment, a main beam 11 has opposing upper and lower surfaces. The upper surface is capable of being connected to a lifting hook. A plurality of sub-beams 12 are spaced apart on the lower surface. Optionally, any two adjacent sub-beams 12 are arranged in parallel. The sub-beams 12 are movably mounted on the main beam 11, allowing any two adjacent sub-beams 12 to move closer or further away from each other. By adjusting the position of the sub-beams 12, the structure of the object 2 to be lifted can be better matched. Each sub-beam 12 is provided with a plurality of first slings 13, each of which is used to connect to the object to be lifted. Specifically, a connector is provided at one end of the first sling 13 away from the sub-beam 12, which is used to connect to the object 2 to be lifted. Optionally, the connector may be a hook, a lifting ring, or the like. The first slings 13 are retractable. During lifting, by adjusting the length of the first slings 13, the center of gravity of the lifting hook and the object 2 to be lifted can be aligned on the same vertical line. A vertical line is a line perpendicular to a horizontal plane.

[0041] When using the sling provided in this embodiment, the main beam 11 is connected to the hook of the lifting equipment. Then, based on the structure of the object to be lifted 2, the position of the calculated center of gravity of the object to be lifted is determined, and the setting position of the lifting lug on the object to be lifted 2 is determined. The position of the auxiliary beam 12 is adjusted according to the setting position of the lifting lug on the object to be lifted 2, and a suitable first sling 13 on the auxiliary beam 12 is selected and connected to the lifting lug on the object to be lifted 2. After the connection is completed, the operator adjusts the length of the first sling 13 by trial lifting the object to be lifted so that the hook of the lifting equipment and the calculated center of gravity of the object to be lifted 2 are on the same vertical line. Compared with the existing technology, there is no need to design the sling before each lifting operation, which reduces construction costs.

[0042] Optional, such as Figure 1 As shown, the main beam 11 is provided with a first slide rail 111, and each of the sub-beams 12 is provided with a first roller set 121 that cooperates with the first slide rail 111. The sub-beams 12 are slidably connected to the first slide rail 111 through the first roller set 121.

[0043] In this embodiment, the sub-beam 12 is slidably connected to the main beam 11. The main beam 11 is provided with a first slide rail 111. Optionally, the first slide rail 111 is a T-shaped guide rail. The sub-beam 12 is provided with a first roller assembly 121 for cooperating with the first slide rail 111. The first roller assembly 121 includes at least two coaxial and spaced-apart first wheels. The first wheels are disposed on the first slide rail 111 and are movable along the extension direction of the first slide rail 111. By slidably connecting the sub-beam 12 to the main beam 11, the position of the sub-beam 12 is easily adjusted, allowing the sling to better adapt to the shape of the object 2 to be lifted. At the same time, adjustment is convenient, thereby improving operating efficiency.

[0044] It can be understood that in this embodiment, a plurality of spaced-apart holes can be provided on the main beam 11, and the number of holes needs to be greater than the number of sub-beams 12. At the same time, through holes corresponding to the holes on the main beam 11 are provided on the sub-beam 12, and the through holes and the holes are connected by bolts. This can also achieve the purpose of enabling two adjacent sub-beams 12 to approach or move away from each other in this embodiment.

[0045] like Figure 1 As shown, the sling further includes a first telescopic member 14. The first telescopic member 14 has a first fixed end and a first telescopic end, wherein the first fixed end is disposed on the main beam 11, and the first telescopic end is connected to the first roller assembly 121.

[0046] In this embodiment, the sliding of the sub-beam 12 is driven by the first telescopic member 14. By providing the first telescopic member 14, the position of the sub-beam 12 can be adjusted in real time, thereby enabling load adjustment during lifting operations, improving operating efficiency, and being unaffected by the operator's experience and ability, thereby reducing operating costs.

[0047] Optionally, in this embodiment, the first telescopic member 14 may be an electric cylinder, an oil cylinder, or a pneumatic cylinder, etc. In this embodiment, it is an oil cylinder, which will be described in detail below.

[0048] Optionally, in this embodiment, the first telescopic member 14 can be a single-acting oil cylinder or a double-acting oil cylinder. When the first telescopic member 14 is a single-acting oil cylinder, it has one first telescopic end; when the first telescopic member 14 is a double-acting oil cylinder, it has two first telescopic ends, which can be set between two adjacent first roller groups 121 to drive the two first roller groups 121 to move at the same time. In this embodiment, Figure 1 As shown, a design method of mixing single-acting cylinders and double-acting cylinders is adopted.

[0049] like Figure 1 As shown, the sling further includes a second telescopic member 15, which corresponds one-to-one with the first sling 13. The second telescopic member 15 has a second fixed end and a second telescopic end, the second fixed end is connected to the sub-beam 12, and the second telescopic end is connected to the first sling 13.

[0050] In this embodiment, one end of the second telescopic member 15 is connected to the sub-beam 12, and the other end is connected to the first sling 13, so as to realize the telescopic setting of the first sling 13. When in use, the length of the first sling 13 is controlled by the second telescopic member 15, so that the sling can better cooperate with the object to be lifted 2, avoiding eccentricity of the object to be lifted 2 during lifting.

[0051] Optional, such as Figure 1As shown, the secondary beam 12 is provided with a second slide rail 122, and each first sling 13 is provided with a second roller set 131 at one end away from the connecting member. The first sling 13 is slidably connected to the second slide rail 122 through the second roller set 131.

[0052] In this embodiment, the first slings 13 are slidably connected to the subbeam 12 via a second roller assembly 131. During use, the position of the first slings 13 can be adjusted based on factors such as the center of gravity of the object 2 to be lifted, allowing the sling to accommodate a larger number of objects 2 to be lifted. Furthermore, by slidably attaching the first slings 13 to the subbeam 12, the number of first slings 13 can be reduced, reducing the weight of the sling and enabling the lifting equipment to lift heavier objects 2.

[0053] Preferably, Figure 1 As shown, the first slide rail 111 and the second slide rail 122 are vertically arranged.

[0054] In this embodiment, the first slide rail 111 and the second slide rail 122 are vertically arranged, so that the first sling 13 can be adjusted to any position on the lower surface of the main beam 11, so that the sling can adapt to more objects 2 to be lifted.

[0055] like Figure 1 As shown, the sling further includes a third telescopic member 16 . The third telescopic member 16 has a third fixed end and a third telescopic end, wherein the third fixed end is disposed on the sub-beam 12 , and the third telescopic end is connected to the second roller assembly 131 .

[0056] In this embodiment, the sliding of the first sling 13 is driven by the third telescopic member 16. By providing the third telescopic member 16, the position of the first sling 13 can be adjusted in real time, thereby enabling load adjustment during the lifting operation, improving operation efficiency, and being unaffected by the operator's experience and ability, thereby reducing operation costs.

[0057] Optionally, in this embodiment, the third telescopic member 16 may be an electric cylinder, an oil cylinder, or a pneumatic cylinder, etc. In this embodiment, it is an oil cylinder, which will be described in detail below.

[0058] Optionally, in this embodiment, the third telescopic member 16 can be a single-acting oil cylinder or a double-acting oil cylinder. When the third telescopic member 16 is a single-acting oil cylinder, it has one third telescopic end; when the third telescopic member 16 is a double-acting oil cylinder, it has two third telescopic ends, which are arranged between two adjacent second roller groups 131 and can simultaneously drive the two second roller groups 131 to move. In this embodiment, Figure 1 As shown, a double-acting oil cylinder is used to drive the second roller assembly 131.

[0059] like Figure 1As shown, the sling further includes a plurality of second slings 18. The main beam 11 is provided with a plurality of lifting points 112, each corresponding one to each of the second slings 18. All of the lifting points 112 are sequentially connected to form a pattern, with the center of the pattern coinciding with the center of the main beam 11. The second slings 18 are retractable, with one end connected to the lifting equipment and the other end connected to the lifting points 112.

[0060] In this embodiment, a second sling 18 is used to connect the main beam 11 and the lifting equipment. The main beam 11 is provided with multiple lifting points 112, and the second sling 18 is connected to each of these lifting points 112. When selecting the lifting points 112, all of them are connected in sequence to form a pattern. The center of this pattern must coincide with the center of the main beam 11. This ensures that when the lifting equipment is lifting the sling, the center of gravity of the lifting equipment hook and the sling are on the same vertical line.

[0061] For example, if the main beam 11 is a rectangle, the lifting points 112 can be set at the four vertices of the rectangle, and correspondingly, they are connected to the hooks of the lifting equipment through four second lifting ropes 18.

[0062] Optionally, one end of the second sling 18 away from the sling point 112 is ring-shaped, and can be hung on a hook of the equipment therein.

[0063] At the same time, in this embodiment, the second sling 18 is retractable. When in use, the length of the second sling 18 can be adjusted according to the actual situation of the object 2 to be lifted, so that the center of gravity of the hook and sling of the lifting equipment are located on the same vertical line.

[0064] like Figure 1 As shown, in this embodiment, the sling further includes a plurality of fourth telescopic members 17, each corresponding one-to-one with the second sling 18. The second sling 18 includes a first section 181 and a second section 182. The fourth telescopic member 17 has a fourth fixed end and a fourth telescopic end. One end of the first section 181 is connected to the lifting device and the other end is connected to the fourth fixed end. One end of the second section 182 is connected to the fourth telescopic end and the other end is connected to the lifting point 112.

[0065] In this embodiment, the length of the second sling 18 is adjusted by the fourth telescopic member 17. Specifically, the fourth telescopic member 17 is provided on the second sling 18, and the second sling 18 is divided into a first section 181 and a second section 182. The first section 181 is close to the lifting equipment, and the second section 182 is close to the sling. The first section 181 and the second section 182 are connected by the fourth telescopic member 17. By extending and retracting the fourth telescopic member 17, the first section 181 and the second section 182 are moved closer to or further away from each other. By adjusting the length of the second sling 18, the center of gravity of the hook of the lifting equipment and the sling can be located on the same vertical line.

[0066] In the sling provided by the embodiment of the present invention, the first telescopic member 14 , the second telescopic member 15 , the third telescopic member 16 and the fourth telescopic member 17 are all oil cylinders.

[0067] It should be noted that, during use, it is necessary to ensure that the weight of the object 2 to be lifted does not exceed the maximum load of the third telescopic member 16 and the fourth telescopic member 17 .

[0068] like Figure 1 As shown, a hydraulic pump station 19 is provided on the main beam 11. The first telescopic member 14, the second telescopic member 15, the third telescopic member 16 and the fourth telescopic member 17 are all oil cylinders, and the first telescopic end, the second telescopic end, the third telescopic end and the fourth telescopic end are all connected to the hydraulic pump station 19 through pipelines.

[0069] In this embodiment, by setting up a hydraulic pump station 19, the telescopic amounts of the first telescopic member 14, the second telescopic member 15, the third telescopic member 16 and the fourth telescopic member 17 can be adjusted in real time, so that the sling can be adjusted with load without the need for repeated lifting for verification, thereby reducing the labor intensity of the operator and having strong practicality and convenience.

[0070] Optionally, in this embodiment, a shielding shed is provided above the hydraulic pump station 19 to prevent the hydraulic pump station 19 from being damaged during use.

[0071] When using the sling provided by the embodiment of the present invention, the sling is first selected according to the weight of the object to be lifted 2 to avoid exceeding the load of the sling. Then, the second sling 18 is connected to the lifting point 112 of the main beam 11, and the end of the second sling 18 away from the lifting point 112 is hung on the hook of the lifting equipment. Afterwards, the hydraulic pump station 19 pumps oil to the first cylinder (first telescopic member 14), the second cylinder (second telescopic member 15), the third cylinder (third telescopic member 16) and the fourth cylinder (fourth telescopic member 17) to check whether the first cylinder, the second cylinder, the third cylinder and the fourth cylinder can be used normally. Afterwards, the sling is lifted above the object to be lifted 2 by the lifting equipment, and the hook of the lifting equipment and the calculated center of gravity of the object to be lifted 2 are on the same vertical line; then the first sling 13 is connected to the lifting lug on the object to be lifted 2, and, when connecting, the position of the sub-beam 12 is observed and adjusted by the second and third cylinders to ensure that the first sling 13 is vertical. After the connection is complete, a test lift of the object is performed. During the test lift, the levelness of the object 2 to be lifted is checked. If it exceeds the standard requirements, the hydraulic pump station 19 controls the first, second, third, and fourth cylinders to adjust the level until the standard requirements are met. Once the levelness of the object 2 to be lifted meets the standard requirements, the object 2 is hoisted to the designated position.

[0072] The sling provided by the embodiment of the present invention has a simple overall structure and a sophisticated design. It can solve on-site construction problems by combining only a few steel beams, slings and hydraulic devices. The assembly and installation of the various components are relatively convenient, and the operation is simple and easy to learn. At the same time, during the lifting operation, the appropriate connection position can be flexibly selected according to the environmental conditions of the construction site and the size of the object to be lifted. Moreover, the use of the same set of slings can meet the lifting needs of objects of various sizes, greatly improving the adaptability. Finally, a hydraulic pump station 19 is installed on the main beam 11, and the hydraulic pump station 19 is used to control the extension and retraction of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder, so that after the object 2 to be lifted is lifted, the sling can be loaded to adjust and monitor the horizontality and the stress condition of the sling. The entire adjustment process can be completed by a single person through remote control, without the need for repeated lifting for verification, which reduces the labor intensity of the operator and has strong practicality and ease of use.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sling for connecting a lifting device to an object to be lifted (2), characterized in that: include: a main beam (11) and a plurality of secondary beams (12); The main beam (11) is used to be connected to the lifting equipment, and all the auxiliary beams (12) are arranged on the main beam (11) at intervals, and any two adjacent auxiliary beams (12) can be close to or away from each other; A plurality of first slings (13) are arranged at intervals on each of the auxiliary beams (12), the first slings (13) are retractable, and a connecting piece for connecting to the object to be lifted (2) is provided at one end of the first sling (13) away from the auxiliary beam (12); The main beam (11) is provided with a first slide rail (111), and each of the auxiliary beams (12) is provided with a first roller assembly (121) that cooperates with the first slide rail (111); The auxiliary beam (12) is slidably connected to the first slide rail (111) via the first roller assembly (121); The sling further comprises a first telescopic member (14); The first telescopic member (14) has a first fixed end and a first telescopic end, the first fixed end is arranged on the main beam (11), and the first telescopic end is connected to the first roller assembly (121); The sling further comprises a second telescopic member (15), the second telescopic member (15) corresponding one-to-one to the first sling (13); The second telescopic member (15) has a second fixed end and a second telescopic end, the second fixed end is connected to the auxiliary beam (12), and the second telescopic end is connected to the first sling (13); A second slide rail (122) is provided on the auxiliary beam (12), and a second roller assembly (131) is provided at one end of each of the first slings (13) away from the connecting member; The first sling (13) is slidably connected to the second slide rail (122) via the second roller set (131); The second slide rail (122) is arranged perpendicular to the first slide rail (111).

2. The sling according to claim 1, characterized in that: The sling further comprises a third telescopic member (16); The third telescopic member (16) has a third fixed end and a third telescopic end, the third fixed end is arranged on the auxiliary beam (12), and the third telescopic end is connected to the second roller group (131).

3. The sling according to claim 2, characterized in that: The sling further comprises a plurality of second slings (18); A plurality of lifting points (112) are provided on the main beam (11), the lifting points (112) correspond one-to-one to the second slings (18), and all the lifting points (112) are sequentially connected to form a figure, the center of the figure coincides with the center of the main beam (11); The second sling (18) is retractable, one end of the second sling (18) is connected to the lifting equipment, and the other end is connected to the lifting point (112).

4. The sling according to claim 3, characterized in that: The sling further comprises a plurality of fourth telescopic members (17), wherein the fourth telescopic members (17) correspond one to one with the second slings (18); The second sling (18) includes a first section (181) and a second section (182), and the fourth telescopic member (17) has a fourth fixed end and a fourth telescopic end; One end of the first section (181) is connected to the lifting equipment, and the other end is connected to the fourth fixed end; one end of the second section (182) is connected to the fourth telescopic end, and the other end is connected to the lifting point (112).

5. The sling according to claim 4, characterized in that: A hydraulic pump station (19) is provided on the main beam (11); The first telescopic member (14), the second telescopic member (15), the third telescopic member (16) and the fourth telescopic member (17) are all oil cylinders, and the first telescopic end, the second telescopic end, the third telescopic end and the fourth telescopic end are all connected to the hydraulic pump station (19) through pipelines.

Images