Marine fairlead structure and machining method thereof

Abstract

The invention discloses a ship fairlead structure and a processing method thereof, for the ship fairlead structure, a ship is further provided with a hole surrounding piece, the hole surrounding piece is divided into two parts along the center of the extending direction of the hole surrounding piece, the two parts are connected end to end to form a fairlead in a surrounding mode, a fairlead is formed in the fairlead, and the fairlead is connected to a bulwark. By increasing the arc radius of the contact face of the fairlead and the mooring rope, abrasion of the fairlead to the mooring rope is improved, and the fairlead is structurally reinforced to prevent loads acting on the mooring rope from damaging the fairlead. The fairlead and the formed fairlead can be obtained by cutting and welding one hole surrounding piece, and the fairlead is simple in structure and easy to manufacture.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to a ship fairlead hole structure and a processing method thereof. Background Art

[0002] The fairlead hole (also known as Panama hole) is a round or oval steel casting. It is an indispensable fairlead device during the ship's stoppage. The fairlead hole is usually embedded in the bulwark (mostly seen in the middle of the ship). When the mooring cable (cable) passes through the fairlead hole, the contact surface is in an arc shape to avoid the bulwark from cutting the mooring cable and to facilitate the smooth passage of the mooring cable harp head.

[0003] However, existing aluminum alloy ships usually use self-made fairleads, which are usually made of small-diameter round bars to form closed fairleads. Due to the small edge arc of this type of fairlead, there are problems such as cable wear and insufficient strength. Summary of the invention

[0004] The present invention aims to solve one of the problems in the related art at least to a certain extent. To this end, one of the purposes of the present invention is to provide a ship fairlead structure and a processing method thereof, which is used to improve the structural strength of the fairlead, and has a simple structure and is easy to manufacture.

[0005] A ship fairlead hole structure and a processing method thereof are used in ships. The ship comprises a bulwark and is also provided with a hole-enclosing member. The hole-enclosing member is divided into two parts along the center of its extension direction. The two parts are connected end to end to form a fairlead member. A fairlead hole is formed in the fairlead member. The fairlead member is connected to the bulwark.

[0006] Furthermore, the cable guide is a round rod, which is divided into two semi-round rods along the center of its extension direction, and the two semi-round rods are connected end to end to form a cable guide, and the outer arc of the semi-round rod is arranged toward the inner side of the cable guide.

[0007] Furthermore, the cable guide is made of aluminum alloy, stainless steel, nickel-based alloy or titanium alloy.

[0008] Furthermore, the diameter of the hole surrounding member ranges from 120 mm to 150 mm.

[0009] Furthermore, the ship also includes a web, the web is connected to the bulwark, and the outer side of the fairlead is connected to the web.

[0010] Furthermore, the thickness of the web is in the range of 5 mm to 10 mm.

[0011] Furthermore, the ship also includes a reinforcing profile, a side surface of the reinforcing profile is connected to the bulwark, and an end portion is connected to an outer side surface of the fairlead.

[0012] Furthermore, there are a plurality of reinforcing profiles, and the plurality of reinforcing profiles are connected to the outer side surface of the cable guide at intervals.

[0013] Furthermore, the cross-sectional shape of the cable guide is a rounded rectangle.

[0014] The present invention also provides a method for processing a ship fairlead hole, which is used to produce the fairlead hole structure as described above, and is characterized in that a round rod is used. The method for processing the ship fairlead hole comprises the following steps: Cut the round bar into two half round bars; The two semi-circular bars are bent separately by a cold bending machine; Welding the two ends of the two semicircular rods at the interfaces to form the cable guide; The fairlead is mounted to the bulwark.

[0015] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: The present invention improves the wear of the cable by the cable guide hole by increasing the arc radius of the contact surface between the cable guide hole and the cable, and strengthens the cable guide hole structure to prevent the load acting on the cable from damaging the cable guide hole. The cable guide part and the formed cable guide hole can be obtained by segmenting and welding a hole-enclosing part, which has a simple structure and is easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] In the attached figure: Figure 1 This is a structural schematic diagram of an embodiment of a ship fairlead structure of the present application; Figure 2 This is a front view of an embodiment of a ship fairlead structure of the present application; Figure 3 A side view of an embodiment of a ship fairlead structure of the present application; Figure 4 This is a schematic diagram of the steps of the method for processing a ship fairlead hole in this application.

[0019] Reference numerals: 1. A ship fairlead hole structure; 100, bulwark; 200, web; 300, reinforcing profile; 10, fairlead member; 11, fairlead hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] like Figure 1 - Figure 4 As shown, the present application provides a ship fairlead hole structure 1, the ship is also provided with a surrounding hole member, the surrounding hole member is divided into two parts along the center of its extension direction, the two parts are connected end to end to form a fairlead member 10, a fairlead hole 11 is formed in the fairlead member 10, and the fairlead member 10 is connected to the bulwark 100.

[0023] The cable guide hole 11 inside the cable guide 10 effectively alleviates the wear of the cable due to friction when passing through the cable guide hole 11 by increasing the arc radius of the contact surface between the cable guide hole 11 and the cable, thereby greatly extending the service life of the cable and reducing maintenance costs.

[0024] It is worth mentioning that the present application also performs structural reinforcement on the fairing hole 11 . This reinforcement design effectively prevents damage to the fairing hole 11 caused by excessive load.

[0025] In terms of manufacturing process, a simple splitting and welding operation is performed using a hole-enclosing member to easily obtain a cable guide member 10 with a complete structure and excellent performance and a cable guide hole 11 therein. This design not only simplifies the production process and reduces the manufacturing cost, but also makes the maintenance and replacement of the cable guide hole 11 structure extremely convenient.

[0026] In a specific embodiment, the material selection of the hole-enclosing member is also crucial. The preferred material should have good corrosion resistance and sufficient mechanical strength to ensure long-term use without damage in a harsh marine environment. For example, stainless steel or specially treated high-strength steel can be used as the material of the hole-enclosing member.

[0027] In addition, the shape design of the hole-enclosing member also needs to consider the specific needs of the ship. In some cases, the hole-enclosing member can be designed to have a certain angle of inclination to adapt to the cable tension at different angles, thereby further improving the stability and safety of the fairlead 11.

[0028] In terms of processing methods, the present application also provides an efficient processing flow. First, the hole-enclosing member material is cut into the required size, and then processed by a precision CNC machine tool to ensure that the dimensional accuracy and arc radius of the cable guide hole 11 meet the design requirements. Next, the processed hole-enclosing member is welded to form a complete cable guide 10. Finally, non-destructive testing is performed on the welding parts to ensure the welding quality, thereby ensuring the structural strength and service life of the cable guide hole 11.

[0029] Through the above processing method, the cable guides 10 that meet the requirements can be mass-produced, which greatly improves the production efficiency and ensures the quality consistency of the products. This processing method is not only suitable for large-scale production, but also suitable for small-batch customized production to meet the needs of different customers.

[0030] Furthermore, the cable guide 10 is a round rod, which is divided into two semi-round rods along the center of its extension direction. The two semi-round rods are connected end to end to form the cable guide 10, and the outer arcs of the semi-round rods are arranged toward the inner side of the cable guide 10.

[0031] The center of the round rod in its extension direction is cleverly divided into two completely symmetrical semi-round rods. This design not only reflects the engineers' ultimate pursuit of space utilization, but also virtually enhances the stability and durability of the cable guide 10.

[0032] When the two semicircular rods are connected end to end, a complete cable guide 10 is formed. The outer arcs of the two semicircular rods face the inner side of the cable guide 10. This design enables the cable guide 10 to more evenly disperse the force when it is subjected to the huge pulling force from the cable, thereby effectively avoiding the situation of single-point force, greatly improving its bearing capacity and service life.

[0033] The cable guide 10 can maintain stable performance in harsh marine environments due to the semi-circular rod splicing design and the inward facing outer arc. It can not only effectively disperse the tension of the cable and reduce the degree of wear, but also reduce the friction resistance of the cable during the sliding process through its smooth arc surface, further improving the efficiency and safety of the cable.

[0034] In addition, it is worth mentioning that the design of the cable guide 10 also fully considers the convenience of maintenance. Since the semi-circular rod splicing method is adopted, when the cable guide 10 needs to be replaced or repaired, it can be more convenient to disassemble and assemble. This not only reduces the difficulty and cost of maintenance, but also improves work efficiency and safety.

[0035] In practical applications, the processing method of the cable guide hole 11 structure also embodies innovation and high efficiency. First, through precise CNC machine processing, the dimensional accuracy and shape consistency of the semicircular rod are ensured, thereby ensuring the assembly accuracy of the cable guide 10. Then, high-strength materials are used for manufacturing to ensure the stability and corrosion resistance of the cable guide 10 in long-term use. During the assembly process, through special clamps and positioning devices, the two semicircular rods can be quickly and accurately connected end to end to form a complete cable guide 10.

[0036] In addition, the design of the fairlead hole 11 also takes into account the compatibility with the hull structure. The installation position of the fairlead hole 11 is carefully designed to ensure that the fairlead 10 can effectively perform its function without affecting the strength of the hull structure. Around the fairlead hole 11, drainage and anti-water accumulation structures are also designed to prevent seawater from being retained in the hole, thereby avoiding structural damage caused by corrosion.

[0037] Furthermore, the cable guide 10 is made of aluminum alloy, stainless steel, nickel-based alloy or titanium alloy.

[0038] Aluminum alloys are widely used in the fields of shipbuilding and marine engineering due to their light weight, high strength, good corrosion resistance and good processing performance. As a material for cable guides 10, aluminum alloys can not only effectively reduce equipment weight and energy consumption, but also maintain good stability in harsh environments such as humidity and salt spray.

[0039] Stainless steel is known for its excellent corrosion resistance, especially in corrosive media such as chloride ions. In the marine environment, the stainless steel cable guide 10 can maintain a smooth surface for a long time, reducing the increase in friction and aggravated wear caused by corrosion. Common 304 and 316 stainless steels are one of the preferred materials for the manufacture of the cable guide 10 due to their good mechanical properties and processing properties. In addition, stainless steel also has high strength and toughness, and can withstand large tension and impact forces.

[0040] Nickel-based alloy is a special material with excellent high temperature resistance, corrosion resistance and wear resistance. In high temperature, high pressure and strong corrosion environment, the nickel-based alloy cable guide 10 shows excellent performance stability.

[0041] Titanium alloys are known for their low density, high strength, high corrosion resistance and good biocompatibility. Although they are relatively expensive, they are undoubtedly an ideal choice for applications where weight and strength are strictly required. In shipbuilding and marine engineering, titanium alloy fairleads 10 can provide excellent load-bearing capacity and corrosion resistance while reducing weight. In addition, titanium alloys also have good fatigue resistance and thermal stability, and can maintain stable performance in complex and changing marine environments.

[0042] Furthermore, the diameter of the hole surrounding member ranges from 120 mm to 150 mm.

[0043] The lower limit of the diameter of the hole-enclosing member is 120 mm, which may be based on the consideration of the structural strength of the equipment to ensure that the hole-enclosing member can withstand sufficient load without deformation or damage. The upper limit of 150 mm is to optimize the use of materials, reduce the overall weight, or meet the needs of a specific space layout. It is understandable that the diameter of the hole-enclosing member can be 120 mm, 125 mm, 130 mm, 135 mm, etc.

[0044] In summary, the setting of the diameter range of the hole-enclosing parts from 120mm to 150mm is the result of in-depth consideration of factors such as process accuracy, material selection, and application scenarios. This range not only ensures the superior performance and reliability of the hole-enclosing parts, but also provides a strong guarantee for their wide application in various industrial fields. In the future development, with the continuous advancement of science and technology and the continuous innovation of technology, we have reason to believe that the diameter range of the hole-enclosing parts will be more accurate and reasonable, bringing more convenience and benefits to industrial manufacturing.

[0045] Furthermore, the ship further comprises a web 200 , the web 200 is connected to the bulwark 100 , and the outer side surface of the fairlead 10 is connected to the web 200 .

[0046] As a key component in the ship structure, the web 200 is designed to enhance the longitudinal and transverse strength of the hull to ensure that it can be as stable as a rock on rough seas. The web 200 is usually made of high-strength steel, which is carefully selected and processed to ensure its durability and corrosion resistance in extreme environments. It closely connects the various parts of the hull together to form a stable whole.

[0047] When we mention the web 200, we have to mention its close connection with the bulwark 100. The bulwark 100, as the wall at the edge of the ship deck, not only plays a role in preventing the invasion of waves and protecting the safety of the crew, but also bears the important task of supporting the deck structure and enhancing the stability of the hull. The connection between the web 200 and the bulwark 100 adopts advanced welding and bolt fixing technology to ensure the close combination between the two and form a solid barrier on the side of the ship. This design not only improves the overall structural strength of the ship, but also effectively prevents seawater from penetrating into the hull, ensuring the navigation safety of the ship.

[0048] During the navigation of the ship, the cable guide 10 is a key component connecting the cable and the hull, and its importance is self-evident. The outer side of the cable guide 10 is directly connected to the web 200. This design not only facilitates the fixing and operation of the cable, but also makes full use of the strength and stability of the web 200, ensuring that the cable will not damage the hull structure when subjected to huge tension. In addition, the cable guide 10 is also carefully designed and optimized to reduce the friction and wear between the cable and the hull, thereby extending the service life of the cable.

[0049] Further, the thickness of the web 200 ranges from 5 mm to 10 mm.

[0050] In the engineering field, the web 200 is an important part of the structure. Its thickness design is not only related to the stability and load-bearing capacity of the entire structure, but also directly affects the material efficiency and manufacturing cost. Specifically, the thickness range of the web 200 is usually carefully set between 5mm and 10mm. This design contains rich technical considerations and practical experience.

[0051] First, from the perspective of material mechanics, the thickness of the web 200 directly determines its ability to resist bending and shear deformation. When the structure is subjected to external loads, the web 200, as one of the main load-bearing components, needs to have sufficient rigidity to maintain the overall shape of the structure and prevent failure due to excessive deformation. 5mm as the lower limit of thickness ensures that the web 200 can maintain sufficient stability under most conventional working conditions; while 10mm as the upper limit ensures strength while avoiding unnecessary material waste and improving economic benefits.

[0052] Furthermore, the ship further comprises a reinforcing profile 300 , the side of the reinforcing profile 300 is connected to the bulwark 100 , and the end of the reinforcing profile 300 is connected to the outer side of the fairlead 10 .

[0053] Reinforced profile 300 is a profile used to enhance the strength of the hull structure. It is usually made of high-strength steel and has excellent bending, torsion and compression resistance. It can withstand various loads brought by wave impact, cargo pressure and bad weather.

[0054] The end of the reinforcing profile 300 is cleverly connected to the outer side of the cable guide 10. This design not only enhances the supporting force of the cable guide 10, but also improves its ability to resist wind pressure and surge. In strong wind and huge waves, this close connection can ensure that the cable is stable and effectively prevent accidents caused by cable breakage or loosening.

[0055] In order to further improve the effectiveness of the reinforced profile 300, ship designers will also carry out anti-corrosion treatment on its surface, such as spraying anti-rust paint or using hot-dip galvanizing technology, to extend its service life and reduce maintenance costs. In addition, some high-end ships will also use reinforced profiles 300 made of composite materials. These materials are not only light in weight and high in strength, but also have excellent corrosion resistance and fatigue resistance, which can further improve the overall performance of the ship.

[0056] Furthermore, there are multiple reinforcing profiles 300 , and the multiple reinforcing profiles 300 are connected to the outer side surface of the cable guide 10 at intervals.

[0057] There are multiple reinforcing profiles 300, which are spaced apart and connected to the outer side of the cable guide 10 to ensure structural strength while taking into account the lightweight, economical and sustainable structure to achieve maximum utilization and protection of natural resources.

[0058] In the design of the cable guide 10, multiple reinforcing profiles 300 are cleverly spaced and connected to the outer side thereof, forming a solid defense line, effectively resisting the impact and pressure of the external environment. This layout not only improves the overall strength of the cable guide 10, but also enables the structure to evenly disperse stress when subjected to force, thereby avoiding damage caused by single-point overload.

[0059] Furthermore, the cross-sectional shape of the cable guide 10 is a rounded rectangle.

[0060] Compared with the traditional rectangular or circular cross-section, the rounded rectangle combines the advantages of both. Its straight edge portion can provide good structural strength and rigidity, ensuring stability when subjected to huge tensile forces; and the presence of rounded corners effectively reduces stress concentration and reduces the risk of fatigue damage caused by excessive local stress. This design cleverly improves the service life and safety of the cable guide 10 while ensuring strength. The cable guide 10 with a rounded rectangular cross-section can not only effectively disperse and resist these external forces, but also maintain a good working condition during long-term use, reducing downtime and maintenance time caused by component damage, and improving the operating efficiency of the offshore platform.

[0061] In addition, the design of the rounded rectangular cross section also takes into account the convenience of the manufacturing process. In modern manufacturing, the use of advanced technologies such as CNC machining and precision casting can easily achieve accurate manufacturing of the rounded rectangular cross section. This process not only improves production efficiency, but also ensures the quality stability and consistency of the cable guide 10. At the same time, the rounded rectangular cross section is also convenient for subsequent painting, anti-corrosion and other treatment processes, further extending the service life of the cable guide 10.

[0062] The present invention also provides a method for processing a ship fairlead hole 11, which is used to produce the above fairlead hole 11 structure, and is characterized in that a round rod is used. The method for processing the ship fairlead hole 11 comprises the following steps: Cut the round bar into two half round bars; The two semi-circular bars are bent separately by a cold bending machine; Weld the two ends of the two semicircular rods at the interface to form a cable guide 10; The fairlead 10 is mounted to the bulwark 100 .

[0063] First, we select high-quality round bar materials as the starting point for processing. These round bars are strictly screened to ensure that the material is uniform and defect-free. Then, advanced CNC cutting equipment is used to accurately cut the round bar into two completely symmetrical half-round bars. This step not only requires extremely high cutting accuracy, but also ensures that the edges of the half-round bars are smooth and burr-free, laying a solid foundation for subsequent processing.

[0064] Next, the two semi-circular bars are sent to the cold bending machine for bending. With its powerful processing capacity and precise control system, the cold bending machine can accurately bend the semi-circular bars according to the preset curvature radius. In this process, we pay special attention to controlling the bending speed and force to avoid excessive stress concentration or cracks inside the material. After the cold bending process, the shape of the semi-circular bar perfectly meets the design requirements of the fairlead hole 11, showing excellent flexibility and strength.

[0065] The two bent semicircular bars are placed in a special welding fixture to ensure that the interfaces at both ends fit tightly and without gaps. Then, advanced welding techniques such as TIG welding or laser welding are used to perform fine welding on the interfaces. During the welding process, we strictly control parameters such as welding temperature, current and time to ensure that the quality of the weld meets the highest standards. After welding is completed, the weld needs to be ground and polished to make it blend with the surrounding materials, making it both beautiful and durable.

[0066] The last step is to install the welded fairlead 10 on the bulwark 100 of the ship. During the installation process, we accurately measure and locate the position of the fairlead hole 11 according to the actual structure and design requirements of the ship. Then, the fairlead 10 is firmly fixed to the bulwark 100 using high-strength bolts or welding. After the installation is completed, strict debugging and testing work is required to ensure that the fairlead hole 11 can smoothly guide the cable through during use and withstand the tensile test under various harsh working conditions.

[0067] This processing method of the ship's fairlead 11 has many advantages over traditional processes. First, it uses advanced CNC cutting and cold bending technology, which greatly improves processing accuracy and efficiency; second, through fine welding and grinding, the stability and aesthetics of the fairlead 11 structure are ensured; finally, the method also fully considers the actual use needs and environmental factors of the ship, ensuring that the fairlead 11 can operate stably for a long time in a complex and changeable marine environment.

[0068] The specific structure of the ship fairlead hole 11 structure refers to the above embodiment. Since the processing method of the ship fairlead hole 11 structure adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0069] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A ship fairlead structure, used for a ship, wherein the ship comprises a bulwark, characterized in that: The ship is also provided with a hole-enclosing member, which is divided into two parts along the center of its extension direction. The two parts are connected end to end to form a cable guide member, a cable guide hole is formed in the cable guide member, and the cable guide member is connected to the bulwark.

2. A ship fairlead structure according to claim 1, characterized in that: The cable guide is a round rod, which is divided into two semi-round rods along the center of its extension direction. The two semi-round rods are connected end to end to form a cable guide, and the outer arc of the semi-round rod is arranged toward the inner side of the cable guide.

3. A ship fairlead structure according to claim 2, characterized in that: The cable guide is made of aluminum alloy, stainless steel, nickel-based alloy or titanium alloy.

4. A ship fairlead structure according to any one of claims 1 to 3, characterized in that: The diameter of the hole surrounding member ranges from 120 mm to 150 mm.

5. A ship fairlead structure according to any one of claims 1 to 3, characterized in that: The ship further comprises a web connected to the bulwark, and the outer side surface of the fairlead is connected to the web.

6. A ship fairlead structure according to claim 5, characterized in that: The thickness of the web is in the range of 5 mm to 10 mm.

7. A ship fairlead structure according to any one of claims 1 to 3, characterized in that: The ship further comprises a reinforcing profile, a side surface of the reinforcing profile is connected to the bulwark, and an end portion of the reinforcing profile is connected to an outer side surface of the fairlead.

8. A ship fairlead structure according to claim 7, characterized in that: There are multiple reinforcing profiles, and the multiple reinforcing profiles are connected to the outer side surface of the cable guide at intervals.

9. A ship fairlead structure according to any one of claims 1 to 3, characterized in that: The cross-sectional shape of the cable guide is a rounded rectangle.

10. A method for processing a ship fairlead hole, used for producing a fairlead hole structure as claimed in any one of claims 1 to 9, characterized in that: Using a round rod, the processing method of the ship fairlead hole comprises the following steps: Cutting the round rod into two half round rods; The two semi-circular bars are bent separately by a cold bending machine; Welding the two ends of the two semicircular rods at the interfaces to form the cable guide; The fairlead is mounted to the bulwark.

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