Improved low-stretch hawser for mooring and towing vessels
Patent Information
- Application Number
- CN202522189468.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-10-16
AI Technical Summary
当前，传统船舶缆绳多采用单一纤维材料或简单复合结构制成，存在诸多技术缺陷：其一，核心受力层抗扭性能不足，多依赖单一纤维束或普通钢芯，在长期拉力作用下易发生扭转缠绕，导致缆绳受力不均，甚至出现局部断裂风险；其二，缺乏有效的缓冲吸能结构，船舶在风浪作用下产生的冲击载荷会直接传递至缆绳本体，不仅易造成缆绳高回弹现象，影响系泊稳定性，还会缩短缆绳使用寿命；其三，层间连接可靠性差，部分缆绳各结构层仅通过简单编织贴合，无专用过渡结构，在反复受力或海洋环境侵蚀下易出现层间剥离，降低整体结构强度；其四，外护套排水性能欠缺，海洋环境中缆绳外表面易积聚海水、湿气，不仅增加缆绳自重，还可能加速护套老化与内部结构腐蚀，进一步影响缆绳使用性能与安全性
[0006]本实用新型的有益效果是：复合芯层以抗扭加强芯为中心，配合外周等螺距螺旋缠绕的超高分子量聚乙烯纤维束，既保证了核心受力强度，又大幅增强了抗扭性能，有效抑制缆绳作业时扭转疲劳；梯度缓冲层可有效吸收船舶风浪冲击载荷，实现缆绳低回弹特性，提升系泊稳定性；复合芯层与梯度缓冲层之间的改性环氧树脂过渡层，大幅强化了层间连接可靠性，防止层间剥离；增强层采用涤纶工业丝与锦纶纤维混纺丝双向斜纹编织，进一步提升缆绳整体结构强度；外护套层采用氯化聚乙烯材料，配合外周均匀分布的导水槽，既具备优良的耐磨、耐腐蚀性能，又能快速排出表面积水，减少海洋环境对缆绳的侵蚀；同时，各层通过热熔粘结或机械编织固定形成一体化结构，确保缆绳在长期海洋复杂工况下的结构稳定性与使用寿命，满足船舶系泊拖带作业对高可靠性、安全性及长效性的需求。
Smart Images
Figure CN224812757U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ship equipment technology, and in particular to an improved low-rebound cable for ship mooring and towing. Background Technology
[0002] During ship operation, mooring and towing cables are key equipment to ensure safe berthing and precise towing of ships, and their performance directly affects the safety and efficiency of ship operations. Currently, traditional ship mooring lines are mostly made of single fiber materials or simple composite structures, which have many technical defects: First, the core load-bearing layer has insufficient torsional resistance, relying mostly on a single fiber bundle or ordinary steel core. Under long-term tensile force, it is prone to torsion and entanglement, resulting in uneven stress on the mooring line and even the risk of local breakage. Second, there is a lack of effective buffer and energy absorption structures. The impact load generated by the ship under wind and waves will be directly transmitted to the mooring line itself, which will not only easily cause high rebound of the mooring line, affecting mooring stability, but also shorten the service life of the mooring line. Third, the reliability of interlayer connections is poor. Some mooring lines are simply braided together by various structural layers without a dedicated transition structure. Under repeated stress or marine environmental corrosion, interlayer peeling is prone to occur, reducing the overall structural strength. Fourth, the drainage performance of the outer sheath is inadequate. In the marine environment, seawater and moisture easily accumulate on the outer surface of the mooring line, which not only increases the weight of the mooring line, but may also accelerate the aging of the sheath and the corrosion of the internal structure, further affecting the performance and safety of the mooring line. Therefore, developing a ship mooring and towing cable with low resilience, high torsion resistance, strong cushioning, and excellent drainage performance has become an urgent need in the field of ship equipment. Utility Model Content
[0003] To address some of the problems existing in the prior art, this utility model provides an improved low-rebound cable for ship mooring and towing. This cable, through its multi-layer concentric cylindrical integrated structure design, significantly improves its overall performance and is suitable for the safe mooring and power transmission of various types of ships in port berthing, offshore operations, and towing scenarios.
[0004] To achieve the above objectives, this utility model provides an improved low-resilience cable for ship mooring and towing, comprising a cable body, which includes a composite core layer, a gradient buffer layer, a reinforcing layer, and an outer sheath layer arranged in a concentric cylindrical structure from the inside out, and the layers are fixedly connected by hot-melt bonding or mechanical weaving to form an integrated structure; the composite core layer is the core load-bearing layer of the cable, including an anti-torsion reinforcing core and ultra-high molecular weight polyethylene fiber bundles; the anti-torsion reinforcing core is a central layer structure, and the ultra-high molecular weight polyethylene fiber bundles are arranged around the outer periphery of the anti-torsion reinforcing core and are tightly fitted; the gradient buffer layer includes an elastic inner layer and an energy-absorbing outer layer, and the energy-absorbing outer layer is disposed on the outer periphery of the elastic inner layer; the outer surface of the outer sheath layer is provided with a plurality of water-guiding grooves evenly spaced, and the water-guiding grooves extend along the axial direction of the outer sheath layer.
[0005] When this invention is in operation, the cable body is supported by a composite core layer, a gradient buffer layer, a reinforcing layer, and an outer sheath layer arranged concentrically from the inside out. The anti-torsion reinforcing core of the composite core layer is made of galvanized steel strands and aramid fiber bundles twisted together at a pitch of 3 to 5 times the diameter. Ultra-high molecular weight polyethylene fiber bundles are wound around its outer circumference in 2 to 3 layers of reverse spirals at an angle of 20° to 35°. The elastic inner layer of the gradient buffer layer is made of a blend of natural rubber and ethylene propylene rubber, and the energy-absorbing outer layer is made of a porous polyurethane composite material with a porosity of 25 to 35%. The composite core layer and the gradient buffer layer are bonded together by a modified epoxy resin transition layer. The reinforcing layer is made of a blend of polyester industrial yarn and nylon fiber with a mass ratio of 3:2 to 2:1, woven in a 45° to 60° bidirectional twill weave. The outer sheath layer is made of chlorinated polyethylene material and has several water-guiding grooves evenly spaced on its outer surface that extend along its axial direction. All layers are integrated into a single structure through hot-melt bonding or mechanical weaving to jointly bear the load.
[0006] The beneficial effects of this invention are as follows: The composite core layer, with a torsion-resistant reinforcing core at its center and ultra-high molecular weight polyethylene fiber bundles wound in a spiral with equal pitch on the outer periphery, ensures both core strength and significantly enhances torsional performance, effectively suppressing torsional fatigue during cable operations; the gradient buffer layer effectively absorbs the impact load of wind and waves from the ship, achieving low rebound characteristics of the cable and improving mooring stability; the modified epoxy resin transition layer between the composite core layer and the gradient buffer layer significantly strengthens the reliability of interlayer connections and prevents interlayer delamination; the reinforcing layer uses a bidirectional twill weave of polyester industrial yarn and nylon fiber blended yarn, further enhancing the overall structural strength of the cable; the outer sheath layer uses chlorinated polyethylene material, combined with evenly distributed water-guiding channels on the outer periphery, possessing excellent wear resistance and corrosion resistance, and can quickly drain surface water, reducing the erosion of the cable by the marine environment; at the same time, the layers are fixed into an integrated structure through hot-melt bonding or mechanical weaving, ensuring the structural stability and service life of the cable under long-term complex marine conditions, meeting the requirements of high reliability, safety, and long-term effectiveness for ship mooring and towing operations.
[0007] As a further improvement of this utility model, in order to ensure the balance between torsion resistance and load-bearing capacity, improve the uniformity of stress distribution, and enhance the low rebound effect, the cross-sectional diameter of the anti-torsion reinforcing core accounts for 1 / 4 to 1 / 3 of the total diameter of the composite core layer. The ultra-high molecular weight polyethylene fiber bundles are spirally wound around the anti-torsion reinforcing core as the axis with equal pitch, and the winding direction makes an angle of 20° to 35° with the length direction of the cable body. The anti-torsion reinforcing core is made of galvanized steel strands and aramid fiber bundles twisted and woven together, and the twisting pitch is 3 to 5 times the diameter of the anti-torsion reinforcing core. The number of winding layers of the ultra-high molecular weight polyethylene fiber bundles is 2 to 3, and the winding directions of adjacent layers are opposite.
[0008] As a further improvement of this utility model, in order to achieve graded buffering and absorption of impact loads while improving elastic recovery capability, the total thickness of the gradient buffer layer is 2.5mm to 4mm, and the thickness ratio of the elastic inner layer to the energy-absorbing outer layer is 1:1.2 to 1:1.5; the elastic inner layer is made of a blend of natural rubber and ethylene propylene rubber, and has a compression rebound rate ≥92%; the energy-absorbing outer layer is made of porous polyurethane composite material, with a porosity of 25% to 35% and an impact energy absorption efficiency ≥70%.
[0009] As a further improvement of this utility model, in order to avoid local stress concentration and improve the overall mechanical properties of the cable, the reinforcing layer is woven from a blend of polyester industrial yarn and nylon fiber, and the mass ratio of polyester industrial yarn to nylon fiber blend is 3:2 to 2:1; the reinforcing layer is woven in a two-way twill weave with a weaving angle of 45° to 60° in a cross-layered manner.
[0010] As a further improvement of this utility model, in order to significantly enhance the reliability of interlayer connection and prevent interlayer slippage under dynamic load, a transition layer is also provided between the composite core layer and the gradient buffer layer. The transition layer is made of modified epoxy resin coating with a thickness of 0.3 to 0.6 mm. The bonding strength between the transition layer and the composite core layer is ≥5.5 MPa, and the bonding strength between the transition layer and the gradient buffer layer is ≥4.5 MPa.
[0011] As a further improvement of this utility model, in order to enhance the overall weather resistance and UV resistance to adapt to harsh marine environments, and at the same time improve drainage efficiency and reduce seawater erosion, the outer sheath is made of chlorinated polyethylene material with a thickness of 2.5mm to 4mm; the cross-section of the water guide channel is U-shaped or arc-shaped, with a depth of 1 to 2mm, an opening width of 2 to 3mm, and a bottom arc radius of 0.5 to 1mm. Attached Figure Description
[0012] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model.
[0013] Figure 2 This is a schematic diagram of the composite core layer in this utility model.
[0014] The cable consists of: 1. Cable body; 2. Composite core layer; 21. Anti-torsion reinforcing core; 211. Galvanized steel strand; 212. Aramid fiber bundle; 22. Ultra-high molecular weight polyethylene fiber bundle; 3. Gradient buffer layer; 31. Elastic inner layer; 32. Energy-absorbing outer layer; 4. Reinforcing layer; 5. Outer sheath layer; 51. Water guide groove; and 6. Transition layer. Detailed Implementation
[0015] To enable those skilled in the art to better understand the technical solutions in this utility model, the following description is provided in conjunction with the appendix. Figure 1-2 The present invention will be further described below. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the protection scope of the present invention.
[0016] like Figure 1-2An improved low-resilience mooring cable for ship mooring and towing is shown, comprising a cable body 1. The cable body 1 includes a composite core layer 2, a gradient buffer layer 3, a reinforcing layer 4, and an outer sheath layer 5 arranged in a concentric cylindrical structure from the inside out. The layers are fixedly connected by hot-melt bonding or mechanical weaving to form an integrated structure. The composite core layer 2 is the core load-bearing layer of the cable, including a torsion-resistant reinforcing core 21 and ultra-high molecular weight polyethylene fiber bundles 22. The torsion-resistant reinforcing core 21 is a central layer structure, and the ultra-high molecular weight polyethylene fiber bundles 22 are arranged around the outer periphery of the torsion-resistant reinforcing core 21 and are tightly fitted. The gradient buffer layer 3 includes an elastic inner layer 31 and an energy-absorbing outer layer 32. An energy-absorbing outer layer 32 is disposed on the outer periphery of the elastic inner layer 31; a plurality of water-guiding grooves 51 are evenly spaced on the outer surface of the outer sheath layer 5, and the water-guiding grooves 51 extend along the axial direction of the outer sheath layer 5; the cross-sectional diameter of the anti-torsion reinforcing core 21 accounts for 1 / 4 to 1 / 3 of the total diameter of the composite core layer 2; the ultra-high molecular weight polyethylene fiber bundles 22 are spirally wound around the anti-torsion reinforcing core 21 with equal pitch, and the winding direction makes an angle of 20° to 35° with the length direction of the cable body 1; the anti-torsion reinforcing core 21 is woven from galvanized steel strands 211 and aramid fiber bundles 212, and the pitch of the woven strands is 3 to 5 times the diameter of the anti-torsion reinforcing core 21; the ultra-high molecular weight polyethylene... The number of winding layers of the olefin fiber bundle 22 is 2 to 3, and the winding directions of adjacent layers are opposite; the total thickness of the gradient buffer layer 3 is 2.5 mm to 4 mm, and the thickness ratio of the elastic inner layer 31 to the energy-absorbing outer layer 32 is 1:1.2 to 1:1.5; the elastic inner layer 31 is made of a blend of natural rubber and ethylene propylene rubber, and the compression resilience is ≥92%; the energy-absorbing outer layer 32 is made of porous polyurethane composite material, and the porosity is 25% to 35%, with an impact energy absorption efficiency ≥70%; the reinforcing layer 4 is woven from a blend of polyester industrial yarn and nylon fiber, and the mass ratio of polyester industrial yarn to nylon fiber blend is 3:2 to 2:1; the reinforcing layer 4 The weaving method is bidirectional twill weave, with the weaving angle being 45° to 60° cross-layered; a transition layer 6 is also provided between the composite core layer 2 and the gradient buffer layer 3, the transition layer 6 is made of modified epoxy resin coating, and its thickness is 0.3 to 0.6 mm; the bonding strength between the transition layer 6 and the composite core layer 2 is ≥5.5 MPa, and the bonding strength between the transition layer 6 and the gradient buffer layer 3 is ≥4.5 MPa; the outer sheath layer 5 is made of chlorinated polyethylene material, and its thickness is 2.5 mm to 4 mm; the cross-section of the water guide channel 51 is generally U-shaped or arc-shaped, its depth is 1 to 2 mm, its opening width is 2 to 3 mm, and the radius of the arc at the bottom of the channel is 0.5 to 1 mm.
[0017] When this invention is in operation, the cable body 1 is subjected to force collaboratively by a composite core layer 2, a gradient buffer layer 3, a reinforcing layer 4, and an outer sheath layer 5, which are concentrically arranged from the inside out. The anti-torsion reinforcing core 21 of the composite core layer 2 is woven from galvanized steel strands 211 and aramid fiber bundles 212 at a pitch of 3 to 5 times the diameter. Ultra-high molecular weight polyethylene fiber bundles 22 are wound in 2 to 3 layers of reverse spirals at an angle of 20° to 35° around its outer periphery. The elastic inner layer 31 of the gradient buffer layer 3 is made of a blend of natural rubber and ethylene propylene rubber, absorbing… The outer layer 32 is made of porous polyurethane composite material with a porosity of 25-35%; the composite core layer 2 and the gradient buffer layer 3 are bonded together by a modified epoxy resin transition layer 6; the reinforcing layer 4 is made of polyester industrial yarn and nylon fiber blended yarn with a mass ratio of 3:2 to 2:1 in a 45° to 60° bidirectional twill weave; the outer sheath layer 5 is made of chlorinated polyethylene material and has several water guide grooves 51 evenly spaced on its outer surface and extending along its axial direction; and each layer is formed into an integrated structure by hot melt bonding or mechanical weaving to jointly bear the load.
[0018] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. An improved low-resilience mooring tow rope for ships, comprising a rope body (1), characterized in that: The cable body (1) includes a composite core layer (2), a gradient buffer layer (3), a reinforcing layer (4), and an outer sheath layer (5) arranged in a concentric cylindrical structure from the inside to the outside. The layers are fixedly connected by hot-melt bonding or mechanical weaving to form an integrated structure. The composite core layer (2) is the core force-bearing layer of the cable, including an anti-torsion reinforcing core (21) and ultra-high molecular weight polyethylene fiber bundles (22). The anti-torsion reinforcing core (21) is a central layer structure, and the ultra-high molecular weight polyethylene fiber bundles (22) are arranged around the outer periphery of the anti-torsion reinforcing core (21) and are tightly fitted. The gradient buffer layer (3) includes an elastic inner layer (31) and an energy-absorbing outer layer (32), and the energy-absorbing outer layer (32) is arranged on the outer periphery of the elastic inner layer (31). The outer surface of the outer sheath layer (5) is evenly spaced with a number of water-guiding grooves (51), and the water-guiding grooves (51) extend along the axial direction of the outer sheath layer (5).
2. The improved low-resilience mooring towing cable for ships according to claim 1, characterized in that: The cross-sectional diameter of the anti-torsion reinforcing core (21) accounts for 1 / 4 to 1 / 3 of the total diameter of the composite core layer (2). The ultra-high molecular weight polyethylene fiber bundle (22) is spirally wound around the anti-torsion reinforcing core (21) with equal pitch, and the winding direction is at an angle of 20° to 35° with the length direction of the cable body (1). The anti-torsion reinforcing core (21) is made of galvanized steel strand (211) and aramid fiber bundle (212) twisted together. The twisting pitch is 3 to 5 times the diameter of the anti-torsion reinforcing core (21). The number of winding layers of the ultra-high molecular weight polyethylene fiber bundle (22) is 2 to 3, and the winding directions of adjacent layers are opposite.
3. The improved low-resilience cable for ship mooring and towing according to claim 1, characterized in that: The total thickness of the gradient buffer layer (3) is 2.5 mm to 4 mm, and the thickness ratio of the elastic inner layer (31) to the energy-absorbing outer layer (32) is 1:1.2 to 1:1.
5. The elastic inner layer (31) is made of a blend of natural rubber and ethylene propylene rubber, and has a compression resilience of ≥92%. The energy-absorbing outer layer (32) is made of porous polyurethane composite material, with a porosity of 25 to 35% and an impact energy absorption efficiency of ≥70%.
4. The improved low-resilience mooring towing cable for ships according to claim 1, characterized in that: The reinforcing layer (4) is woven from a blend of polyester industrial yarn and nylon fiber, and the mass ratio of the blend of polyester industrial yarn and nylon fiber is 3:2 to 2:1; the reinforcing layer (4) is woven in a two-way twill weave with a weave angle of 45° to 60°.
5. The improved low-resilience mooring towing cable according to claim 1, characterized in that: A transition layer (6) is provided between the composite core layer (2) and the gradient buffer layer (3). The transition layer (6) is made of modified epoxy resin coating and has a thickness of 0.3 to 0.6 mm. The bonding strength between the transition layer (6) and the composite core layer (2) is ≥5.5 MPa, and the bonding strength between the transition layer (6) and the gradient buffer layer (3) is ≥4.5 MPa.
6. The improved low-rebound cable for ship mooring and towing according to claim 1, characterized in that: The outer sheath (5) is made of chlorinated polyethylene material with a thickness of 2.5 mm to 4 mm; the cross-section of the water guide trough (51) is U-shaped or arc-shaped, with a depth of 1 to 2 mm, an opening width of 2 to 3 mm, and a bottom arc radius of 0.5 to 1 mm.