High-strength, wear-resistant flat lifting slings

Abstract

This utility model discloses a high-strength, wear-resistant flat lifting sling, comprising a flat sling body and lifting rings integrally connected to both ends of the flat sling body. Both the flat sling body and the lifting rings are woven from warp and weft threads, and a wear-resistant movable sleeve is slidably mounted on the outer surface of the flat sling body. This utility model utilizes warp threads made of a blend of ultra-high molecular weight polyethylene fiber and polyester industrial filament, and weft threads made of a blend of glass fiber and aramid fiber to form the weaving structure of the flat sling body and lifting rings, thus improving overall strength, elasticity, and stability. The flat sling body employs a combination of plain and twill weaves, and the lifting rings feature a high-density plain weave structure, enhancing load-bearing capacity and tear resistance. The polyurethane wear-resistant movable sleeve slides in conjunction with the flat sling body, and features anti-slip textures and a positioning structure to effectively prevent wear and displacement. Ultimately, this achieves both high load-bearing capacity and durable wear resistance, improving the safety and efficiency of lifting operations.

Description

Technical Field

[0001] This utility model relates to the field of flat lifting sling technology, specifically a high-strength wear-resistant flat lifting sling. Background Technology

[0002] In industrial production, port freight, construction and other fields, flat lifting slings are a commonly used lifting tool and are widely used in lifting operations of various heavy objects.

[0003] Traditional flat lifting slings are mostly woven from single fiber materials, such as pure polyester or nylon. Although they have a certain load-bearing capacity, they reveal many defects in high-intensity and high-frequency lifting scenarios. In terms of abrasion resistance, the surface of traditional lifting slings usually lacks an effective protective structure. When in contact with the sharp edges of heavy objects or other hard objects, the surface fibers are easily worn, frayed, or even locally broken due to friction, which greatly shortens the service life. Therefore, we have proposed a flat lifting sling that combines high strength, high abrasion resistance, strong adaptability, and can adapt to complex working conditions. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength, wear-resistant, flat lifting sling to solve the problems existing in the operation of the current device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-strength wear-resistant flat lifting sling, comprising a flat sling body and lifting rings integrally connected to both ends of the flat sling body, wherein both the flat sling body and the lifting rings are woven from warp and weft threads, and a wear-resistant movable sleeve is slidably installed on the outer surface of the flat sling body;

[0006] The warp is made of a blend of ultra-high molecular weight polyethylene fiber and polyester industrial filament, and the weft is made of a blend of glass fiber and aramid fiber.

[0007] Furthermore, the flat belt body is woven using a combination of plain weave and twill weave, with plain weave accounting for 60% and twill weave accounting for 40%. The loop has a higher weave density than the flat belt body, and its weave method is reinforced plain weave.

[0008] Furthermore, both the flat belt body and the lifting ring are coated with a wear-resistant coating.

[0009] Furthermore, the wear-resistant movable sleeve is made of polyurethane material.

[0010] Furthermore, the inner wall of the wear-resistant movable sleeve is provided with anti-slip texture, and the anti-slip texture is adapted to the woven texture of the flat belt body surface.

[0011] Furthermore, the flat belt body is provided with positioning protrusions spaced along its length, and the inner wall of the wear-resistant movable sleeve is provided with positioning grooves that cooperate with the positioning protrusions.

[0012] Furthermore, the mass ratio of ultra-high molecular weight polyethylene fiber to polyester industrial filament in the warp is 4:6; the mass ratio of glass fiber to aramid fiber in the weft is 3:7.

[0013] Furthermore, the outer surface of the wear-resistant movable sleeve is coated with a protective coating made of polytetrafluoroethylene material.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a warp yarn blended from ultra-high molecular weight polyethylene fiber and polyester industrial filament, and a weft yarn blended from glass fiber and aramid fiber, to form the woven structure of the flat belt body and lifting rings, thereby improving overall strength, elasticity, and stability. The flat belt body employs a combination of plain and twill weaves, while the lifting rings feature a high-density plain weave structure, enhancing load-bearing capacity and tear resistance. A polyurethane wear-resistant movable sleeve slides smoothly against the flat belt body, complemented by anti-slip textures and positioning structures, effectively preventing wear and displacement. A wear-resistant coating and a polytetrafluoroethylene protective coating cover the surface, reducing friction loss and ultimately achieving both high load-bearing capacity and durable wear resistance, improving the safety and efficiency of lifting operations. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the flat strip body in this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the meridian in this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the latitude line in this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the wear-resistant movable sleeve in this utility model.

[0021] In the diagram: 1. Flat belt body; 2. Lifting ring; 3. Warp; 31. Ultra-high molecular weight polyethylene fiber; 32. Polyester industrial filament; 4. Weft; 41. Glass fiber; 42. Aramid fiber; 5. Wear-resistant movable sleeve; 6. Wear-resistant coating; 7. Protective coating. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a high-strength, wear-resistant flat lifting sling, comprising a flat sling body 1 and lifting rings 2 integrally connected to both ends of the flat sling body 1. This integrated design ensures more even force transmission during lifting and avoids breakage due to stress concentration at the connection. Both the flat sling body 1 and the lifting rings 2 are woven from warp threads 3 and weft threads 4. The warp threads 3 are made of ultra-high molecular weight polyethylene fiber 31 and polyester industrial filament 32 blended at a mass ratio of 4:6. Ultra-high molecular weight polyethylene fiber 31 has extremely high strength and wear resistance. The abrasion resistance provides a strong load-bearing foundation for the lifting sling, while the polyester industrial filament 32 has good elasticity and fatigue resistance, which can buffer the instantaneous impact during the lifting process and extend the service life of the lifting sling; the weft 4 is made of glass fiber 41 and aramid fiber 42 blended in a mass ratio of 3:7. The glass fiber 41 has high rigidity, which can enhance the overall structural stability of the lifting sling and prevent it from deforming excessively under load, while the aramid fiber 42 has excellent high temperature resistance and chemical corrosion resistance, enabling the lifting sling to adapt to a variety of complex working conditions.

[0024] Furthermore, the flat belt body 1 is woven using a combination of plain weave and twill weave, with plain weave accounting for 60%. This weave method creates a tight structure that ensures the stability of the body. Twill weave accounts for 40%, which improves the tensile toughness of the body and makes it less prone to breakage when subjected to tension. The lifting ring 2 has a higher weave density than the flat belt body 1 and uses reinforced plain weave. This allows the lifting ring 2 to withstand greater local tension and more reliably distribute stress when connected to the hook of the lifting equipment, avoiding damage caused by the concentrated tension of the hook.

[0025] Furthermore, a wear-resistant movable sleeve 5 is slidably installed on the outer surface of the flat belt body 1. The wear-resistant movable sleeve 5 is made of polyurethane material, which has excellent wear resistance and elasticity, and can effectively protect the flat belt body 1 from direct abrasion by the sharp edges of the goods. Its inner wall is provided with anti-slip texture, and the anti-slip texture is adapted to the woven texture of the surface of the flat belt body 1. This design can prevent the wear-resistant movable sleeve 5 from shifting at will during the pre-tightening stage before hoisting and during hoisting, ensuring that it is always in the position that needs the most protection. At the same time, the flat belt body 1 is provided with positioning protrusions at intervals along the length direction, and the inner wall of the wear-resistant movable sleeve 5 is provided with positioning grooves that cooperate with the positioning protrusions. During hoisting, the positioning protrusions and positioning grooves interlock with each other, which can prevent the wear-resistant movable sleeve 5 from sliding excessively and detaching from the critical wear area, further enhancing the protective effect.

[0026] Furthermore, the surfaces of the flat belt body 1 and the lifting ring 2 are coated with a wear-resistant coating 6, which can further improve the wear resistance of both and reduce the wear caused by friction with other objects during the lifting process; the outer surface of the wear-resistant movable sleeve 5 is coated with a protective coating 7, which is made of polytetrafluoroethylene. Polytetrafluoroethylene has an extremely low coefficient of friction, which can reduce the friction between the wear-resistant movable sleeve 5 and the cargo or other contact surfaces and reduce the wear rate.

[0027] Working principle: In the cargo loading and unloading area of ​​a port terminal, when it is necessary to lift large steel components, the operators will first select a suitable high-strength wear-resistant flat lifting sling according to the weight and size of the steel component. During operation, the flat sling body 1 is first laid flat under the steel component at a suitable position. At this time, the wear-resistant movable sleeve 5 on the surface of the flat sling body 1 can slide slightly with the contour of the steel component. Its polyurethane material can initially prevent the lifting sling from directly contacting the sharp edges of the steel component. The anti-slip texture of the inner wall matches the woven texture of the surface of the flat sling body 1 to prevent the movable sleeve from shifting during the pre-tightening stage, ensuring that the contact position between the lifting sling and the cargo is accurate. Then, the lifting rings 2 at both ends are hooked onto the hook of the lifting equipment. At this time, the lifting rings 2 adopt a denser reinforced plain weave and are made of blended fibers, which can evenly distribute stress when bearing the tension of the hook and avoid local breakage. When the lifting equipment starts, the lifting ring 2 is subjected to an upward pulling force and transmitted to the flat belt body 1. The warp yarns 3 inside the body immediately play their role. The warp yarns 3, which are a blend of ultra-high molecular weight polyethylene fiber 31 and polyester industrial filament 32 in a mass ratio of 4:6, quickly bear the load in a weave structure that combines plain weave and twill weave. The plain weave of 60% ensures structural stability, while the twill weave of 40% improves tensile toughness. It resists the risk of breakage with the high strength of ultra-high molecular weight polyethylene fiber 31 and buffers the instantaneous impact force with the elasticity of polyester industrial filament 32. As the steel component is slowly lifted, the connection between the flat belt body 1 and the lifting ring 2 forms a stable force transmission node due to the higher weave density of the lifting ring 2, effectively preventing tearing caused by stress concentration. During the lifting and movement of steel components, if the lifting sling rubs against other metal supports or the ground, the wear-resistant coating 6 on the surface of the flat sling body 1 and the lifting ring 2 will initially resist wear. Simultaneously, the wear-resistant movable sleeve 5 will slide with the contact position, and its outer protective coating 7 can reduce the coefficient of friction with the contact surface. Combined with the high wear resistance of the polyurethane substrate, this significantly reduces the wear rate of the lifting sling surface. When the steel component is transferred to the designated position, the operators adjust the lifting equipment to slowly lower the steel component. At this time, the weft yarn 4, made of a 3:7 mass ratio blend of glass fiber 41 and aramid fiber 42 inside the flat sling body 1, plays a lateral stabilizing role. The rigidity of glass fiber 41 ensures that the main body is not easily deformed under load, while the high temperature resistance of aramid fiber 42 can cope with the residual heat that the steel component may carry, and prevent the fiber from aging due to high temperature. At the same time, the positioning protrusion on the flat belt main body 1 and the positioning groove on the inner wall of the wear-resistant movable sleeve 5 interlock with each other to prevent the movable sleeve from sliding excessively and detaching from the critical wear area during unloading. After the steel component is placed stably, the lifting equipment slowly releases the tension, and the tension on the lifting belt gradually decreases. The warp 3 and weft 4 of the blended fiber material return to their initial state with good resilience, making it convenient for the operators to pull the lifting belt out from under the steel component and prepare for the next lifting operation.Throughout the process, the lifting sling achieves both high load-bearing capacity and durable wear resistance through the scientific ratio of fiber materials, the optimized design of the weaving structure, and the synergistic effect of wear-resistant components, significantly improving the safety and efficiency of lifting operations.

[0028] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. High-strength wear-resistant flat lifting belt, comprising a flat belt body (1) and a lifting ring (2) integrally connected to both ends of the flat belt body (1), characterized in that: The flat belt body (1) and the lifting ring (2) are both woven from warp threads (3) and weft threads (4), and a wear-resistant movable sleeve (5) is slidably installed on the outer surface of the flat belt body (1); The warp (3) is made of a blend of ultra-high molecular weight polyethylene fiber (31) and polyester industrial filament (32), and the weft (4) is made of a blend of glass fiber (41) and aramid fiber (42).

2. The high-strength abrasion-resistant flat lifting strap of claim 1, wherein: The flat belt body (1) is woven using a combination of plain weave and twill weave, with plain weave accounting for 60% and twill weave accounting for 40%. The weave density of the hanging ring (2) is greater than that of the flat belt body (1), and its weave method is reinforced plain weave.

3. The high strength abrasion resistant flat lifting strap of claim 1, wherein: The surfaces of the flat belt body (1) and the lifting ring (2) are both coated with a wear-resistant coating (6).

4. The high strength abrasion resistant flat lifting strap of claim 1, wherein: The wear-resistant movable sleeve (5) is made of polyurethane material.

5. The high strength abrasion resistant flat lifting strap of claim 1, wherein: The inner wall of the wear-resistant movable sleeve (5) is provided with anti-slip texture, and the anti-slip texture is compatible with the woven texture on the surface of the flat belt body (1).

6. The high strength abrasion resistant flat lifting strap of claim 1, wherein: The flat belt body (1) is provided with positioning protrusions spaced along the length direction, and the inner wall of the wear-resistant movable sleeve (5) is provided with positioning grooves that cooperate with the positioning protrusions.

7. The high strength abrasion resistant flat lifting strap of claim 1, wherein: The mass ratio of ultra-high molecular weight polyethylene fiber (31) to polyester industrial filament (32) in the warp (3) is 4:6; the mass ratio of glass fiber (41) to aramid fiber (42) in the weft (4) is 3:

7.

8. The high strength abrasion resistant flat lifting strap of claim 1, wherein: The outer surface of the wear-resistant movable sleeve (5) is coated with a protective coating (7), which is made of polytetrafluoroethylene material.

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