Flexible sling with high strength

Abstract

The utility model discloses a flexible sling with high strength, including the sling body, the sling body comprises bearing layer, elastic buffer layer, reinforcing fiber layer, anti -cutting isolation layer, wear -resistant outer layer from inside to outside in proper order, the utility model: the utility model is through the unique five -layer structure design and high -performance material selection, bearing layer adopts the super high molecular weight polyethylene fiber and aramid fiber hybrid knitting, cooperates the glass fiber of reinforcing fiber layer and the cross -section structure of kevlar fiber, greatly strengthens the carrying capacity of sling, can easily cope with the hoisting work of heavy -duty object, the elastic buffer layer selects polyurethane sponge material and designs the cellular structure, can effectively absorb the impact force generated in the hoisting process, avoids the internal structure and damages because of the excessive stress, prolongs the service life of sling significantly, and the polyvinyl chloride coating polyester cloth of anti -cutting isolation layer can resist the puncture of sharp object, provides reliable protection for the internal structure of sling.

Description

Technical Field

[0001] This utility model relates to the field of flexible sling technology, specifically a flexible sling with high strength. Background Technology

[0002] Flexible slings are lifting slings woven from high-strength synthetic fibers (such as polyester and polypropylene), characterized by their softness, light weight, and high strength. They effectively protect the surface of the lifted object from scratches and are suitable for lifting various goods such as precision equipment, pipes, and steel, with significant advantages, especially in scenarios where rigid collisions must be avoided. Compared to traditional steel cable slings, flexible slings are easier to bend, more convenient to operate, corrosion-resistant, rust-resistant, and have a longer service life, making them widely used in machinery manufacturing, logistics transportation, and construction.

[0003] Currently available flexible slings have limitations in structure and materials. Most slings use ordinary fiber materials for their load-bearing layer, which are prone to tensile deformation or even breakage under heavy loads, failing to meet the needs of heavy-duty, high-frequency lifting operations. In terms of cushioning performance, some slings have poor cushioning layer materials, failing to effectively absorb and disperse energy when lifting heavy objects and generating impact forces. This not only accelerates fatigue damage to the internal structure of the sling and shortens its service life but may also lead to safety accidents due to excessive instantaneous stress or impact forces. Regarding cut resistance and abrasion resistance, existing cut-resistant isolation layers are mostly single-layer ordinary fabrics, which have weak protection against sharp objects and are easily punctured, exposing the internal load-bearing structure of the sling and significantly reducing safety during use. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength flexible sling to solve the problems mentioned in the background art regarding the poor load-bearing capacity, cushioning performance, and cut resistance of current flexible slings.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-strength flexible sling includes a sling body, which comprises, from the inside out, a load-bearing layer, an elastic buffer layer, a reinforcing fiber layer, a cut-resistant isolation layer, and a wear-resistant outer layer. The load-bearing layer, elastic buffer layer, reinforcing fiber layer, cut-resistant isolation layer, and wear-resistant outer layer are fixedly connected by heat-pressing adhesive.

[0007] In a preferred embodiment of this utility model, the supporting layer is woven from a mixture of ultra-high molecular weight polyethylene fiber and aramid fiber.

[0008] In a preferred embodiment of this utility model, the elastic buffer layer is made of polyurethane foam, and the thickness of the elastic buffer layer is 2mm. The interior of the elastic buffer layer 12 has a honeycomb-shaped hollow structure.

[0009] In a preferred embodiment of this utility model, the reinforcing fiber layer is made of glass fiber filaments and Kevlar fiber filaments woven together, and the thickness of the reinforcing fiber layer is 1.5 mm.

[0010] In a preferred embodiment of this utility model, the cut-resistant isolation layer is a high-strength polyester fabric treated with polyvinyl chloride coating.

[0011] In a preferred embodiment of this utility model, the wear-resistant outer layer is a nylon cloth coated with polytetrafluoroethylene, and the thickness of the wear-resistant outer layer is 1 mm.

[0012] In a preferred embodiment of this utility model, the wear-resistant outer layer surface is provided with annular anti-slip texture, and the annular anti-slip texture is distributed in concentric circles with the central axis of the sling as the center.

[0013] In a preferred embodiment of this utility model, a wavy transition layer is provided between the elastic buffer layer and the reinforcing fiber layer, and the wavy transition layer is made of elastic rubber material.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0015] Beneficial Effects: This utility model significantly improves the overall performance of flexible slings through its unique five-layer structural design and high-performance material selection. The load-bearing layer is made of a mixed weave of ultra-high molecular weight polyethylene fiber and aramid fiber, combined with the cross structure of glass fiber and Kevlar fiber in the reinforcing fiber layer, which greatly enhances the load-bearing capacity of the sling and can easily handle the lifting of heavy objects. The elastic buffer layer is made of polyurethane foam with a honeycomb structure, which can effectively absorb the impact force generated during lifting, prevent the internal structure from being damaged due to excessive force, and significantly extend the service life of the sling. The polyvinyl chloride coated polyester fabric of the cut-resistant isolation layer can resist the puncture of sharp objects and provide reliable protection for the internal structure of the sling.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the main structure of a high-strength flexible sling;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of a flexible sling with high strength.

[0020] Figure 3 This is a schematic diagram of the connection structure of the elastic buffer layer and the reinforcing fiber layer in a high-strength flexible sling.

[0021] In the diagram: 10. Sling body; 11. Bearing layer; 12. Elastic buffer layer; 13. Reinforcing fiber layer; 14. Cut-resistant isolation layer; 15. Wear-resistant outer layer; 20. Annular anti-slip texture; 21. Wavy transition layer. Detailed Implementation

[0022] The embodiments of this utility model 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 utility model, and should not be construed as limiting this utility model.

[0023] Please refer to Figures 1-3 This utility model discloses a high-strength flexible sling, comprising a sling body 10. The sling body 10 includes, from the inside out, a load-bearing layer 11, an elastic buffer layer 12, a reinforcing fiber layer 13, a cut-resistant isolation layer 14, and a wear-resistant outer layer 15. The load-bearing layer 11, the elastic buffer layer 12, the reinforcing fiber layer 13, the cut-resistant isolation layer 14, and the wear-resistant outer layer 15 are fixedly connected by hot-pressing adhesive, that is, the adjacent two-sided structures are fixedly connected by hot-pressing adhesive to ensure that each layer is tightly fitted and not easily separated, thus forming a complete sling. The load-bearing layer 11 is woven from a mixture of ultra-high molecular weight polyethylene fiber and aramid fiber, and the thickness of the load-bearing layer 11 can be set to 3mm. This material combination utilizes the high strength characteristics of the two fibers to improve the overall load-bearing capacity.

[0024] The elastic buffer layer 12 is made of polyurethane foam and has a thickness of 2mm. The polyurethane foam has a honeycomb hollow structure inside to reduce weight and enhance cushioning performance. When subjected to force, it absorbs impact through deformation and protects the internal structure. The reinforcing fiber layer 13 is made of glass fiber and Kevlar fiber cross-woven together and has a thickness of 1.5mm. The cross-woven structure enhances the strength of the strap from multiple directions and prevents tensile deformation. A wavy transition layer 21 is provided between the elastic buffer layer 12 and the reinforcing fiber layer 13. The wavy transition layer 21 is made of elastic rubber and can be set to a thickness of 0.5mm. Its wavy structure can disperse interlayer stress and avoid excessive local stress.

[0025] The cut-resistant isolation layer 14 is made of high-strength polyester fabric with a polyvinyl chloride coating. The thickness of the cut-resistant isolation layer 14 can be set to 2mm. The polyvinyl chloride coating improves the puncture resistance and prevents sharp objects from damaging the internal fibers. The wear-resistant outer layer 15 is made of nylon fabric with a polytetrafluoroethylene coating. The wear-resistant outer layer 15 is 1mm thick. The surface of the wear-resistant outer layer 15 is provided with annular anti-slip textures 20. The annular anti-slip textures 20 are distributed in concentric circles with the central axis of the sling as the center. The wear-resistant outer layer 15 enhances wear resistance, and the annular anti-slip textures 20 increase the friction with the suspended object to prevent slippage.

[0026] The working principle of this utility model is as follows: When the sling carries a heavy object, the load-bearing layer 11, as the core load-bearing component, distributes the load evenly through a mixed weaving structure of ultra-high molecular weight polyethylene fiber and aramid fiber, exhibiting high strength to resist tension. The impact force generated during hoisting is absorbed by the polyurethane sponge of the elastic buffer layer 12, reducing the direct impact force on the load-bearing layer 11. The cross-woven structure of glass fiber filaments and Kevlar fiber filaments in the reinforcing fiber layer 13 enhances the anti-deformation ability both laterally and longitudinally when the sling is under stress, further improving the overall performance. For strength, if the sling comes into contact with a sharp object, the PVC-coated polyester fabric of the cut-resistant isolation layer 14 can prevent puncture and protect the internal structure; while the PTFE-coated nylon fabric of the abrasion-resistant outer layer 15 reduces surface wear through high abrasion resistance, and the annular anti-slip texture 20 increases the friction with the suspended object to prevent slippage. In addition, the wavy transition layer 21 is between the elastic buffer layer 12 and the reinforcing fiber layer 13. Through wavy elastic deformation, it disperses the interlayer stress and avoids local stress concentration that may lead to interlayer separation. This allows each layer to work together and ensures the safety and reliability of the lifting process.

[0027] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flexible sling having high strength, characterized by: The sling body (10) includes, from the inside out, a bearing layer (11), an elastic buffer layer (12), a reinforcing fiber layer (13), a cut-resistant isolation layer (14), and a wear-resistant outer layer (15). The bearing layer (11), the elastic buffer layer (12), the reinforcing fiber layer (13), the cut-resistant isolation layer (14), and the wear-resistant outer layer (15) are fixedly connected by hot-pressing adhesive.

2. The high-strength flexible sling according to claim 1, characterized in that, The supporting layer (11) is woven from a mixture of ultra-high molecular weight polyethylene fiber and aramid fiber.

3. A high-strength flexible sling according to claim 1, characterized in that, The elastic buffer layer (12) is made of polyurethane foam and has a thickness of 2mm. The interior of the elastic buffer layer (12) has a honeycomb hollow structure.

4. A high-strength flexible sling according to claim 1, characterized in that, The reinforcing fiber layer (13) is made of glass fiber filaments and Kevlar fiber filaments woven together, and the thickness of the reinforcing fiber layer (13) is 1.5 mm.

5. A high-strength flexible sling according to claim 1, characterized in that, The cut-resistant isolation layer (14) is a high-strength polyester fabric treated with polyvinyl chloride coating.

6. A high-strength flexible sling according to claim 1, characterized in that, The wear-resistant outer layer (15) is a nylon cloth coated with polytetrafluoroethylene, and the thickness of the wear-resistant outer layer (15) is 1 mm.

7. A high-strength flexible sling according to claim 6, characterized in that, The wear-resistant outer layer (15) has annular anti-slip texture (20) on its surface, and the annular anti-slip texture (20) is distributed in concentric circles with the central axis of the sling as the center.

8. A high-strength flexible sling according to claim 1, characterized in that, A wavy transition layer (21) is provided between the elastic buffer layer (12) and the reinforcing fiber layer (13), and the wavy transition layer (21) is made of elastic rubber.

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