Stainless steel pipe lifting appliance with self-locking structure

Abstract

The utility model relates to a stainless steel pipe lifting appliance with a self-locking structure. The lifting appliance comprises an I-shaped cross beam, a lifting ring arranged at the top, a fixing piece with a bulge and a through hole, and a lifting hook connected to the fixing piece through a fastening ring. The lifting hook is composed of two parallel lifting buckles, and each lifting buckle is composed of four connecting rods which are hinged in sequence to form four hinged shafts. Wherein the first connecting rod and the second connecting rod are linear, each of the third connecting rod and the fourth connecting rod is provided with a linear section and an arc section, and the arc sections can define a closed structure for containing a stainless steel pipe. Self-locking is achieved through the connecting rod mechanism, the stainless steel pipe is effectively prevented from falling off in the hoisting process, operation safety and efficiency are improved, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal pipe manufacturing or processing, in particular to a stainless steel pipe sling with self-locking structure. BACKGROUND

[0002] In the process of metal pipe manufacturing or processing, the hoisting of stainless steel pipes is a common task. Existing slings often lack effective locking mechanisms, leading to the easy falling of stainless steel pipes during hoisting, posing a safety hazard. Therefore, it is necessary to develop a stainless steel pipe sling with self-locking structure to ensure the safety and stability of the hoisting process. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a stainless steel pipe sling with self-locking structure, which can automatically lock during hoisting to prevent the stainless steel pipe from falling and improve the safety of hoisting operations. To achieve the above-mentioned purpose, the present application provides the following technical scheme: a stainless steel pipe sling with self-locking structure, comprising:

[0004] A crossbeam in an I-shaped structure;

[0005] A lifting ring arranged on the top of the crossbeam;

[0006] A fixed sheet arranged on the crossbeam, with a protrusion at the bottom, and a through hole arranged in the protrusion;

[0007] A lifting hook connected to the fixed sheet through a fastening ring, the fastening ring being connected to the lifting hook after passing through the through hole, the lifting hook having two mutually parallel lifting lugs, each lifting lug being composed of a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod connected in sequence, having four hinged shafts, the first connecting rod and the second connecting rod being identical and linear, the third connecting rod and the fourth connecting rod being identical and each having a linear segment and an arc segment, the hinged shafts of the third connecting rod and the fourth connecting rod being located in the linear segment, the two arc segments being oppositely arranged and capable of being closed to form a closed structure for accommodating the stainless steel pipe, and the two lifting lugs being connected through four mutually parallel hinged shafts to form an integral structure.

[0008] Preferably, extension plates are arranged on both sides of the lifting ring, and the extension plates are connected to the crossbeam.

[0009] Preferably, the technical scheme further comprises reinforcing ribs arranged on both sides of the lifting ring and perpendicular to the lifting ring.

[0010] Preferably, the reinforcing ribs are integrally formed with the crossbeam, and the reinforcing ribs are connected to the upper and lower bottom walls and the side wall of the crossbeam.

[0011] Preferably, the fixing sheet is arranged perpendicularly to the axis of the cross beam, and the fixing sheet is connected to the web and the flange of the I-shaped cross beam.

[0012] Preferably, a plurality of fixing sheets and hooks are arranged along the axis of the cross beam.

[0013] Preferably, the limiting hole is arranged at the end of the circular segment and is arranged to be rotatable, the limiting holes of the third connecting rod and the fourth connecting rod are coincident, and the limiting rod is arranged to pass through the limiting holes to lock the third connecting rod and the fourth connecting rod.

[0014] Preferably, a plurality of through grooves are arranged on the web of the I-shaped cross beam to reduce the weight and improve the rigidity of the cross beam.

[0015] Preferably, the anti-skid cushion layer is arranged at the inner wall of the circular segment in contact with the steel pipe.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] The utility model discloses a self-locking structure design realized through a connecting rod mechanism, which can automatically close and lock the stainless steel pipe during hoisting and effectively prevent the stainless steel pipe from falling off during hoisting. This feature significantly improves the safety of hoisting operations and reduces the safety risks during operations. The protrusion and through hole arranged at the bottom of the fixing sheet enable the hook to be quickly and stably connected to the fixing sheet. This improves the assembly efficiency and hoisting efficiency of the lifting device, saves valuable time and improves work efficiency. Furthermore, the hook structure of the utility model is unique, formed by four mutually parallel hinged shafts, wherein the circular segments of the third connecting rod and the fourth connecting rod can be enclosed to form a closed structure that accommodates the stainless steel pipe. This design not only ensures the stability of hoisting but also provides greater adaptability to accommodate stainless steel pipes of different diameters and increases the application range of the lifting device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 A use state perspective view of a stainless steel pipe lifting device with a self-locking structure according to the embodiment of the present application is provided.

[0019] Fig. 2 A perspective view of a stainless steel pipe lifting device with a self-locking structure according to the embodiment of the present application is provided.

[0020] Fig. 3 A perspective view of a hook is provided.

[0021] In the figure: 1, crossbeam; 2, lifting ring; 3, fixed sheet; 4, protrusion; 5, through hole; 6, lifting hook; 7, fastening ring; 8, lifting buckle; 9, first connecting rod; 10, second connecting rod; 11, third connecting rod; 12, fourth connecting rod; 13, straight section; 14, circular arc section; 15, extension plate; 16, reinforcing rib; 17, limiting hole; 18, limiting rod; 19, through slot; 20, anti-skid cushion layer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] It should be noted that in the description of the present application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, it should be understood that, for the convenience of description, the sizes of the various components shown in the drawings are not drawn in accordance with the actual proportional relationship, for example: the thickness or width of certain layers can be exaggerated relative to other layers.

[0025] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not need to be further specifically discussed and described in the description of subsequent drawings.

[0026] To solve the technical problems in the background art, as shown in the drawings, Figs. 1-3 The present application provides a technical solution: a stainless steel pipe sling with a self-locking structure, characterized by:

[0027] The beam 1 adopts an I-shaped structure, which is composed of two parallel flange plates and a web plate connecting the two plates, forming a cross-sectional shape with high bending strength and torsional performance. The material of the beam 1 is preferably high-strength steel to ensure stability and durability under heavy load. The lifting ring 2 is fixed at the top of the beam 1 as the main load-bearing component during lifting. The lifting ring 2 is usually made of high-strength steel and is heat treated to improve its strength and toughness. The fixing plate 3 is arranged on the beam 1 to fix the lifting hook 6. The fixing plate 3 is designed with a protrusion 4 at the bottom, and a through hole 5 is arranged in the protrusion 4 for the fastening ring 7 to pass through. The fastening ring 7 connects the fixing plate 3 and the lifting hook 6 through the through hole 5, ensuring the stable fixation of the lifting hook 6. The cross-section of the fastening ring 7 can be circular or square, and appropriate fasteners are selected according to actual needs. The lifting hook 6 is composed of two parallel lifting clamps 8, each of which is composed of four connecting rods connected in sequence, forming a closed structure to accommodate and lift the stainless steel pipe. Specifically, each lifting clamp 8 is composed of: a first connecting rod 9 and a second connecting rod 10, which are identical and linear, connected by a hinge shaft to form the linear part of the lifting clamp 8, and the fastening ring 7 is hooked on the hinge shaft of the first connecting rod 9 and the second connecting rod 10; a third connecting rod 11 and a fourth connecting rod 12, which are also identical, having a linear segment 13 and a circular arc segment 14. The linear segment 13 is provided with a hinge shaft, which is hinged with the first connecting rod 9 and the second connecting rod 10. The circular arc segments 14 are oppositely arranged, and when the lifting clamp 8 is hinged and rotated, the two circular arc segments 14 can form a closed structure to accommodate the stainless steel pipe. The self-locking function of the lifting clamp 8 is realized through the connecting rod mechanism. When the fastening ring 7 is lifted upward, the hinge shaft of the first connecting rod 9 and the second connecting rod 10 is pulled upward, and the distance between the hinge shafts of the third connecting rod 11 and the fourth connecting rod 12 is expanded, and the two circular arc segments 14 are closed and locked under the action of the connecting rod mechanism. The two lifting clamps 8 are connected by four mutually parallel hinge shafts to form an overall structure. This structure design enables the lifting tool to automatically lock the stainless steel pipe during lifting, preventing it from sliding or falling off during transportation.

[0028] Further, the extension plate 15 is a structural component fixed on both sides of the lifting ring 2, which mainly enhances the connection strength and stability between the lifting ring 2 and the beam 1. The extension plate 15 is usually made of the same high-strength material as the beam 1 to ensure the load-bearing capacity of the overall structure. The extension plate 15 is fixed to the beam 1 by welding or bolt connection to ensure that it can withstand heavy loads during lifting without loosening or deforming. The setting of the extension plate 15 makes the connection between the lifting ring 2 and the beam 1 more secure, enhancing the stability of the entire lifting tool, especially when carrying heavy objects, effectively dispersing the force applied on the lifting ring 2, reducing local stress concentration.

[0029] It is worth noting that the reinforcing ribs 16 are perpendicular to the crossbeam 1 and are arranged on both sides of the lifting eye 2. The main function of the reinforcing ribs 16 is to enhance the strength and rigidity of the lifting eye 2, and to improve the overall stability and carrying capacity of the crossbeam 1. The reinforcing ribs 16 are usually made of the same high-strength material as the crossbeam 1, and can be plate-shaped or strip-shaped. The specific shape and size of the reinforcing ribs 16 are determined according to the diameter of the lifting eye 2 and the area that needs to be reinforced. The reinforcing ribs 16 can be fixed on the lifting eye 2 by welding, bolting or other mechanical connection methods, to ensure that they do not loosen or fall off during hoisting. The arrangement of the reinforcing ribs 16 significantly improves the local strength and rigidity of the lifting eye 2, especially when subjected to large tensile or compressive forces, effectively preventing plastic deformation or rupture of the lifting eye 2. During hoisting, the reinforcing ribs 16 help to disperse the stress around the lifting eye 2, reducing stress concentration and prolonging the service life of the lifting eye 2.

[0030] It is worth noting that the reinforcing ribs 16 are manufactured by an integrated forming process with the crossbeam 1, which usually involves casting, forging or welding techniques, so that the reinforcing ribs 16 form a complete structural unit with the crossbeam 1. The reinforcing ribs 16 are designed to connect the upper and lower bottom walls of the crossbeam 1, which can enhance the overall rigidity of the crossbeam 1, especially when subjected to bending moment or torque. The reinforcing ribs 16 also connect the side walls of the crossbeam 1, further enhancing the lateral stability of the crossbeam 1 and reducing deformation caused by lateral loads.

[0031] It is worth noting that the fixing plate 3 is designed to be perpendicular to the axial direction of the crossbeam 1, which helps to evenly distribute the load on the crossbeam 1 and improves the structural stability of the whole lifting device. The fixing plate 3 is connected to the web and flange of the I-shaped structure of the crossbeam 1, ensuring that the fixing plate 3 can be reliably fixed on the crossbeam 1 and can withstand vertical and horizontal forces from the lifting hook 6. The design of the fixing plate 3 enables it to securely fix the lifting hook 6, ensuring that the lifting hook 6 does not shift or fall off during hoisting. Through the connection with the web and flange of the crossbeam 1, the fixing plate 3 helps to disperse the load on the lifting hook 6, reducing the local stress concentration on the crossbeam 1.

[0032] Further, in order to improve the carrying capacity of the lifting tool and adapt to stainless steel pipes of different lengths, multiple fixing plates 3 are uniformly or as needed arranged along the axis of the cross beam 1. Each fixing plate 3 is installed with a corresponding lifting hook 6. The spacing between the fixing plates 3 is designed according to the diameter of the stainless steel pipe and the lifting requirements, ensuring that the lifting hooks 6 can be evenly distributed on the cross beam 1, providing stable lifting support. By reasonably distributing the fixing plates 3 and the lifting hooks 6, it can be ensured that the load on the cross beam 1 is evenly distributed throughout the length, reducing structural fatigue caused by load concentration. The design of multiple fixing plates 3 and lifting hooks 6 enables the lifting tool to adapt to stainless steel pipes of different lengths and diameters, improving the versatility and adaptability of the lifting tool. Of course, the design of multiple lifting hooks 6 also enables the lifting tool to lift multiple shorter stainless steel pipes at a time, improving the efficiency of the lifting operation.

[0033] It is worth noting that the limiting hole 17 is a hole provided at the end of the circular arc segment 14 of the third connecting rod 11 and the fourth connecting rod 12. These holes are designed to receive the limiting rod 18 to achieve further locking function of the lifting buckle 8. The limiting rod 18 is a rod-shaped component that passes through the limiting hole 17, used to lock the position of the third connecting rod 11 and the fourth connecting rod 12 after the lifting buckle 8 is closed, preventing them from being accidentally opened. Specifically, limiting holes 17 are provided at the end of the circular arc segment 14 of the third connecting rod 11 and the fourth connecting rod 12, and when the hinge is rotated to the closed position, multiple limiting holes 17 coincide, and the limiting rod 18 passes through these limiting holes 17 to lock the third connecting rod 11 and the fourth connecting rod 12, thereby achieving self-locking. The design of the limiting hole 17 and the limiting rod 18 improves the safety of the lifting operation, ensuring that the stainless steel pipe will not fall off due to accidental opening of the lifting buckle 8 during lifting. By simply inserting and pulling out the limiting rod 18, the operator can easily lock and unlock the lifting buckle 8, improving the convenience of the operation.

[0034] It is worth noting that the through slot 19 is opened in the web of the I-shaped structure of the cross beam 1. These through slots 19 are designed to reduce the weight of the cross beam 1 while maintaining or improving its rigidity. The through slot 19 can be linear, curved or any other suitable shape, and its design must ensure that it reduces weight without negatively affecting the structural strength of the cross beam 1.

[0035] Notably, the anti-slip pad 20 is provided at the inner wall of the arc segment 14 of the lifting lug 8 that contacts the stainless steel pipe. This design can prevent the stainless steel pipe from sliding or rolling during hoisting, improving the safety of hoisting. The anti-slip pad 20 can be made of various materials, including but not limited to rubber, polyurethane, or other synthetic materials with good friction coefficient. The anti-slip pad 20 closely fits the inner wall of the arc segment 14 and is not easy to fall off during hoisting. The anti-slip pad 20 can also protect the surface of the stainless steel pipe, avoiding scratches or damage caused by friction during hoisting. In some cases, the anti-slip pad 20 can also absorb part of the impact force, reduce the vibration during hoisting, and protect the stainless steel pipe and the lifting lug 8.

[0036] While embodiments of the present application have been shown and described, it is to be understood that the embodiments described are merely divergences, modifications, replacements and variations of the embodiments of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A stainless steel pipe sling having a self-locking structure, characterized by, It comprises: a crossbeam (1) in the shape of an I-beam; a lifting ring (2) arranged on the top of the crossbeam (1); a fixing plate (3) arranged on the crossbeam (1), and the bottom of the fixing plate (3) is provided with a protrusion (4) in which a through hole (5) is arranged; a lifting hook (6) connected to the fixing plate (3) through a fastening ring (7), the fastening ring (7) is connected to the lifting hook (6) after passing through the through hole (5), and the lifting hook (6) has two mutually parallel lifting clamps (8), each of which is composed of a first connecting rod (9), a second connecting rod (10), a third connecting rod (11) and a fourth connecting rod (12) connected in sequence, has four hinged shafts, and the first connecting rod (9) and the second connecting rod (10) are the same and are linear, the third connecting rod (11) and the fourth connecting rod (12) are the same and each has a linear segment (13) and an arc segment (14), and the hinged shafts of the third connecting rod (11) and the fourth connecting rod (12) are located in the linear segment (13), two arc segments (14) are oppositely arranged and can be closed to form a closed structure for accommodating a stainless steel pipe, and two lifting clamps (8) are connected through four mutually parallel hinged shafts to form an overall structure.

2. The stainless steel pipe sling having a self-locking structure according to claim 1, characterized by, The extension plates (15) are arranged on both sides of the lifting ring (2), and the extension plates (15) are connected to the crossbeam (1).

3. The stainless steel pipe sling having a self-locking structure according to claim 2, characterized by, It also comprises reinforcing ribs (16) arranged on both sides of the lifting ring (2) and perpendicular to the lifting ring (2).

4. The stainless steel pipe sling having a self-locking structure according to claim 3, characterized by, The reinforcing ribs (16) are integrally formed with the crossbeam (1), and the reinforcing ribs (16) are connected to the upper and lower bottom walls and the side wall of the crossbeam (1).

5. The stainless steel pipe sling having a self-locking structure according to claim 1, characterized by, The fixing plate (3) is arranged perpendicular to the axis of the crossbeam (1), and the fixing plate (3) is connected to the web and the flange of the I-beam of the crossbeam (1).

6. The stainless steel pipe sling having a self-locking structure according to claim 5, characterized by, A plurality of fixing plates (3) and lifting hooks (6) are arranged along the axis of the crossbeam (1).

7. The stainless steel pipe sling having a self-locking structure according to claim 1, characterized by, It also comprises limiting holes (17) and limiting rods (18), the limiting holes (17) are arranged at the ends of the arc segments (14), and through hinged rotation, the limiting holes (17) of the third connecting rod (11) and the fourth connecting rod (12) can be coincident, and the limiting rods (18) pass through the limiting holes (17) to lock the third connecting rod (11) and the fourth connecting rod (12).

8. The stainless steel pipe sling having a self-locking structure according to claim 1, characterized by, A plurality of through grooves (19) are arranged on the web of the I-beam of the crossbeam (1) to reduce the weight and improve the rigidity of the crossbeam (1).

9. The self-locking stainless steel pipe sling according to any one of claims 1 to 7, wherein It also comprises an anti-skid cushion layer (20) arranged at the inner wall of the arc segment (14) in contact with the steel pipe.

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