Ship fairlead sheath

Abstract

A ship fairlead sheath, comprising an inner bulwark member (1) and an outer bulwark member (3), wherein the inner bulwark member (1) and the outer bulwark member (3) each comprise a wide end with a large cross section and a narrow end with a small cross section; a parabolic flared wall is arranged between the wide end and the narrow end; an intermediate bulwark ring (2) is arranged between the inner bulwark member (1) and the outer bulwark member (3); the left and right ends of the intermediate bulwark ring (2) are integrally assembled to the narrow end of the inner bulwark member (1) and the narrow end of the outer bulwark member (3), respectively; assembled seams formed in the positions where the intermediate bulwark ring (2) is connected to the narrow end of the inner bulwark member (1) and the narrow end of the outer bulwark member (3) are located on the left and right sides of the narrowest part of the sheath, and the narrowest part of the sheath is formed by the intermediate bulwark ring (2) of a complete structure, so that the structural strength at the narrowest part of the fairlead sheath is improved, the wear at the narrowest part of the fairlead sheath is relieved, and the service life of the fairlead sheath is prolonged.

Description

A ship fairlead hole sheath Technical Field

[0001] The invention relates to the technical field of ship cable guide structures, in particular to a ship cable guide hole sheath. Background Art

[0002] A fairlead, also known as a "bulwark cable eye," is a closed-hole fairlead installed on the bulwark. It is a circular or oval casting that limits the cable's exit. Typically made of cast iron or cast steel, it is installed on the bulwark to guide the cable through the hull and prevent damage. It is widely used in mooring and is an essential feature in marine and offshore engineering.

[0003] After long-term use in a fairlead, the cable is prone to breakage due to wear and tear, causing accidents. A fairlead sleeve is generally provided in the fairlead, which can reduce cable wear and avoid cable breakage accidents. In the prior art, the fairlead sleeve is generally formed by splicing an inner bulwark member and an outer bulwark member symmetrically arranged on both sides. The splicing point of the inner bulwark member and the outer bulwark member is generally designed at the narrowest part of the fairlead sleeve. Because the tonnage of the ship is large, the cable is subjected to a force of about 100 tons during mooring. The maximum force-bearing area on the fairlead sleeve is located at the narrowest area of ​​the fairlead. The splicing seam in the narrowest area will affect the structural strength at this position, causing the narrowest area to be easily damaged due to friction, thereby affecting the service life of the fairlead sleeve. Summary of the Invention

[0004] In response to the shortcomings of the above-mentioned existing production technology, the present application provides a ship fairlead sheath, in which the joint seams formed by the fairlead sheath are located on the left and right sides of the narrowest position of the sheath, and the narrowest position of the fairlead sheath is composed of an intermediate bulwark ring with a complete structure, thereby improving the structural strength of the fairlead sheath at the narrowest position, reducing the wear at the narrowest position of the fairlead sheath, and increasing the service life of the fairlead sheath.

[0005] The technical solutions adopted in the present invention are as follows:

[0006] A ship fairlead cover comprises an inner bulwark member and an outer bulwark member, wherein the inner bulwark member and the outer bulwark member comprise a wide end with a larger cross-section and a narrow end with a smaller cross-section, a parabolic flared wall being provided between the wide end and the narrow end, and an intermediate bulwark ring being provided between the inner bulwark member and the outer bulwark member, wherein the left and right ends of the intermediate bulwark ring are respectively spliced ​​to form an integral body with the narrow end of the inner bulwark member and the narrow end of the outer bulwark member.

[0007] Furthermore, the inner bulwark member and the outer bulwark member have the same structure and are bilaterally symmetrically arranged. The inner bulwark member and the outer bulwark member are truncated cone structures or trumpet-shaped structures.

[0008] Furthermore, fairlead holes for passing cables are provided in the centers of the inner bulwark member and the outer bulwark member.

[0009] Furthermore, the middle bulwark ring is a circular ring structure, and the cross section of the middle bulwark ring increases from small to large from the middle to the left and right ends.

[0010] Furthermore, a plurality of first bolt hole slots are provided at the narrow end of the inner bulwark member, and the plurality of first bolt hole slots are evenly distributed along the circumference. A plurality of second bolt hole slots are provided at the narrow end of the outer bulwark member, and the plurality of second bolt hole slots are evenly distributed along the circumference. The plurality of second bolt hole slots and the plurality of first bolt hole slots are provided in a one-to-one correspondence. A plurality of third bolt hole slots are provided on the intermediate bulwark ring, and the plurality of third bolt hole slots are evenly distributed along the circumference. The plurality of third bolt hole slots and the plurality of first bolt hole slots are provided in a one-to-one correspondence. A butt bolt is correspondingly provided in each second bolt hole slot, and the threaded end of the butt bolt sequentially passes through the third bolt hole slot and the first bolt hole slot at the corresponding position and then is connected to a nut. A washer is correspondingly provided in each second bolt hole slot, and the washer is sleeved over the head end of the butt bolt.

[0011] Furthermore, the buffer layer is glued to the outer surfaces of the inner bulwark member, the middle bulwark ring and the outer bulwark member.

[0012] Furthermore, the outer surface of the buffer layer is an uneven rough surface, and the rough surface has a wavy structure or a stepped structure.

[0013] Furthermore, the left and right ends of the middle bulwark ring, the narrow end of the inner bulwark piece, and the narrow end of the outer bulwark piece are respectively provided with plug-in mechanisms, so that the middle bulwark ring and the narrow end of the inner bulwark piece and the narrow end of the outer bulwark piece are respectively spliced ​​into one body through the plug-in mechanisms.

[0014] Furthermore, the plug-in mechanism includes a plug connector and a plug-in slot corresponding to the plug connector, the plug connector is connected to the end surface of the narrow end of the inner bulwark member and the narrow end of the outer bulwark member, and the plug-in slot is opened on the left and right end surfaces of the middle bulwark ring and accommodates the plug connector to be inserted.

[0015] Furthermore, the plug connectors are arranged in a plurality of groups evenly circumferentially at the narrow ends of the inner bulwark member and the outer bulwark member, and a plurality of plug slots corresponding to the plug connectors are evenly arranged circumferentially at both ends of the intermediate bulwark ring.

[0016] The beneficial effects of the present invention are as follows:

[0017] The joints formed at the connection points between the intermediate bulwark ring and the narrow ends of the inner and outer bulwark members are located on the left and right sides of the narrowest point of the sheath. The narrowest point of the sheath is formed by the complete intermediate bulwark ring, thereby improving the structural strength of the fairlead sheath at the narrowest point, reducing wear at the narrowest point of the fairlead sheath, and extending the service life of the fairlead sheath. The intermediate bulwark ring is provided at the narrowest point of the sheath, greatly increasing the effective force-bearing area at the narrowest point of the sheath, thereby extending the service life of the fairlead sheath. The sheath of the present invention has a double-layer structure, with a buffer layer provided on the outer surfaces of the inner bulwark member, the intermediate bulwark ring, and the outer bulwark member. The buffer layer can buffer the assembly extrusion force between the sheath and the fairlead seat. The outer surface of the buffer layer has an unevenly rough surface. The mutual extrusion between the sheath body and the fairlead forms a solid assembly structure, facilitating installation. The buffer layer avoids gaps between the sheath and the fairlead seat, improving sealing and rust resistance. The buffer layer also provides the sheath with good buffering capacity for the cable.

[0018] BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a perspective view of the present invention.

[0020] FIG2 is a front view of the present invention.

[0021] FIG3 is a perspective view of the intermediate bulwark ring of the present invention.

[0022] FIG4 is a front view of the inner bulwark member of the present invention.

[0023] FIG5 is a rear view of the inner bulwark member of the present invention.

[0024] FIG6 is a front view of the outer bulwark member of the present invention.

[0025] FIG. 7 is a rear view of the outer bulwark member of the present invention.

[0026] FIG8 is a half-section schematic diagram of the present invention.

[0027] FIG9 is a half-section schematic diagram of a chock sheath in the prior art.

[0028] Among them: 1. Inner bulwark member; 2. Intermediate bulwark ring; 3. Outer bulwark member; 4. Buffer layer; 5. Docking bolt; 6. Nut; 7. Washer; 8. Fairlead hole; 9. First bolt hole slot; 10. Second bolt hole slot; 11. Third bolt hole slot.

[0029] DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0031] As shown in FIG1 and FIG2 , a ship fairlead cover comprises an inner bulwark member 1 and an outer bulwark member 3 . The inner bulwark member 1 and the outer bulwark member 3 have the same structure and are bilaterally symmetrically arranged.

[0032] As shown in Figures 1 and 2, the inner bulwark member 1 and the outer bulwark member 3 have a wide end with a larger cross-section and a narrow end with a smaller cross-section, with a parabolic flared wall disposed between the wide and narrow ends. A fairlead 8 for the passage of cables is disposed in the center of the inner bulwark member 1 and the outer bulwark member 3. The inner bulwark member 1 and the outer bulwark member 3 have a truncated cone or trumpet-shaped structure.

[0033] As shown in Figures 1 and 2, an intermediate bulwark ring 2 is disposed between the inner bulwark member 1 and the outer bulwark member 3. This intermediate bulwark ring 2 is a circular ring-shaped structure, with a cross-section that gradually increases in size from the center toward its left and right ends. The left and right ends of the intermediate bulwark ring 2 are integrally joined to the narrow ends of the inner bulwark member 1 and the outer bulwark member 3, respectively. During use, the intermediate bulwark ring 2 forms a seam where it connects to the narrow end of the inner bulwark member 1, and a second seam where it connects to the narrow end of the outer bulwark member 3. These two seams are located to the left and right of the narrowest point of the sheath. The narrowest point of the sheath is formed by the intact intermediate bulwark ring 2, which enhances the structural strength of the chock sheath at its narrowest point, reduces wear there, and increases the service life of the chock sheath.

[0034] The inner bulwark member 1, the intermediate bulwark ring 2 and the outer bulwark member 3 can be made of wear-resistant metal materials, such as cast iron or cast steel, or can be made of wear-resistant polyurethane materials.

[0035] As shown in Figures 3, 4, and 6, the narrow end of the inner bulwark member 1 is provided with a plurality of first bolt holes 9, evenly distributed along the circumference. The narrow end of the outer bulwark member 3 is provided with a plurality of second bolt holes 10, evenly distributed along the circumference, corresponding one-to-one with the first bolt holes 9. The intermediate bulwark ring 2 is provided with a plurality of third bolt holes 11, evenly distributed along the circumference, corresponding one-to-one with the first bolt holes 9. Each second bolt hole 10 is provided with a corresponding butt bolt 5. The threaded end of the butt bolt 5 passes through the corresponding third bolt hole 11 and the corresponding first bolt hole 9, and then connects with a nut 6. Each second bolt hole 10 is provided with a washer 7, which fits over the head of the butt bolt 5. During use, due to the provision of the intermediate bulwark ring 2 at the narrowest position (as shown in FIG8 ), compared to the prior art case where no intermediate bulwark ring 2 is provided (as shown in FIG9 ), the distance L1 between the bottom end surface of the first bolt hole slot 9 and the bottom end surface of the second bolt hole slot 10 of the present invention is greater than the distance L2 between the bottom end surfaces of the two bolt hole slots in the prior art. This greatly increases the effective force-bearing area at the narrowest position, thereby prolonging the service life of the fairlead sheath.

[0036] As shown in Figures 3, 5 and 7, a buffer layer 4 is glued to the outer surfaces of the inner bulwark member 1, the intermediate bulwark ring 2 and the outer bulwark member 3. The buffer layer 4 is made of an elastic material. During assembly, the inner bulwark member 1, the intermediate bulwark ring 2 and the outer bulwark member 3 are pressed tightly into the fairlead seat by the buffer layer 4. The buffer layer 4 is used to buffer the pressure generated by the mutual compression between the fairlead hole sheath and the fairlead seat.

[0037] The outer surface of the buffer layer 4 is an uneven rough surface, and the rough surface has a wavy structure or a stepped structure. The uneven structure of the rough surface causes the buffer layer 4 to be compressed when the fairlead hole sheath and the fairlead seat surface are assembled. The buffer layer 4 forms a firmly sealed assembly structure on the fairlead seat surface during mutual extrusion, thereby improving the sealing and rust prevention capabilities.

[0038] The assembly process of the present invention involves first joining the inner bulwark member 1 and the intermediate bulwark ring 2. The joined intermediate bulwark ring 2 is then pressed into the fairlead. Finally, the outer bulwark member 3 and the intermediate bulwark ring 2 are joined. During the assembly process, the buffer layer 4 compresses against each other, forming a secure assembly structure on the fairlead surface. This prevents gaps between the fairlead sheath and the fairlead, improving sealing and rust resistance.

[0039] The present invention may also employ another specific embodiment for integrally connecting the intermediate bulwark ring 2, the inner bulwark 1, and the outer bulwark member 3. Specifically, plug-in mechanisms are provided at the left and right ends of the intermediate bulwark ring 2 and the narrow ends of the inner bulwark member 1 and the outer bulwark member 3, respectively, so that the intermediate bulwark ring 2 and the narrow ends of the inner bulwark member 1 and the outer bulwark member 3 are integrally connected via the plug-in mechanisms. The plug-in mechanisms include plug connectors, which are connected to the end surfaces of the narrow ends of the inner bulwark member 1 and the outer bulwark member 3. The plug-in grooves are formed on the left and right end surfaces of the intermediate bulwark ring 2 and accommodate the plug connectors. The plug connectors are arranged in a plurality of groups evenly circumferentially at the narrow ends of the inner bulwark member 1 and the outer bulwark member 3. Multiple plug-in grooves, corresponding to the plug connectors, are evenly circumferentially arranged at both ends of the intermediate bulwark ring 2.

[0040] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any modifications may be made within the scope of protection of the present invention.

Claims

1. A ship fairlead sheath, comprising an inner bulwark member (1) and an outer bulwark member (3), wherein the inner bulwark member (1) and the outer bulwark member (3) comprise a wide end with a larger cross section and a narrow end with a smaller cross section, and a parabolic outward wall is arranged between the wide end and the narrow end, characterized in that: An intermediate bulwark ring (2) is arranged between the inner bulwark member (1) and the outer bulwark member (3), and the left and right ends of the intermediate bulwark ring (2) are respectively spliced ​​with the narrow end of the inner bulwark (1) and the narrow end of the outer bulwark member (3) to form a whole.

2. A ship fairlead cover as claimed in claim 1, characterized in that: The inner bulwark component (1) and the outer bulwark component (3) have the same structure and are arranged symmetrically on both sides. The inner bulwark component (1) and the outer bulwark component (3) are truncated cone structures or trumpet-shaped structures.

3. A ship fairlead cover as claimed in claim 2, characterized in that: The inner bulwark member (1) and the outer bulwark member (3) are centrally provided with fairlead holes (8) for the passage of cables.

4. A ship fairlead cover as claimed in claim 3, characterized in that: The middle bulwark ring (2) is a circular ring structure, and the cross section of the middle bulwark ring (2) increases from small to large from the middle to the left and right ends.

5. A ship fairlead cover as claimed in claim 4, characterized in that: The narrow end of the inner bulwark member (1) is provided with a plurality of first bolt hole slots (9), which are evenly distributed along the circumference; the narrow end of the outer bulwark member (3) is provided with a plurality of second bolt hole slots (10), which are evenly distributed along the circumference; the plurality of second bolt hole slots (10) and the plurality of first bolt hole slots (9) are arranged one-to-one; the intermediate bulwark ring (2) is provided with a plurality of third bolt hole slots (11), which are evenly distributed along the circumference; the plurality of third bolt hole slots (11) and the plurality of first bolt hole slots (9) are arranged one-to-one; a butt bolt (5) is correspondingly arranged in each second bolt hole slot (10); the threaded end of the butt bolt (5) passes through the third bolt hole slot (11) at a corresponding position and the first bolt hole slot (9) at a corresponding position in sequence and then is connected to a nut (6); a gasket (7) is correspondingly arranged in each second bolt hole slot (10), and the gasket (7) is sleeved on the head end of the butt bolt (5).

6. A ship fairlead cover as claimed in claim 1, characterized in that: The outer surfaces of the inner bulwark member (1), the middle bulwark ring (2) and the outer bulwark member (3) are glued with a buffer layer (4).

7. A ship fairlead cover as claimed in claim 6, characterized in that: The outer surface of the buffer layer (4) is an uneven rough surface, and the rough surface has a wavy structure or a stepped structure.

8. A ship fairlead cover as claimed in claim 1, characterized in that: The left and right ends of the middle bulwark ring (2), the narrow end of the inner bulwark member (1), and the narrow end of the outer bulwark member (3) are respectively provided with plug-in mechanisms, so that the middle bulwark ring (2) and the narrow end of the inner bulwark member (1), and the narrow end of the outer bulwark member (3) are respectively spliced ​​into one piece through the plug-in mechanisms.

9. A ship fairlead cover as claimed in claim 8, characterized in that: The plug-in mechanism comprises a plug connector and a plug-in slot corresponding to the plug connector, the plug connector is connected to the end surface of the narrow end of the inner bulwark member (1) and the narrow end of the outer bulwark member (3), and the plug-in slot is provided on the left and right end surfaces of the middle bulwark ring (2) and accommodates the plug connector to be inserted.

10. A ship fairlead cover as claimed in claim 9, characterized in that: The plug connectors are multiple groups that are evenly arranged circumferentially at the narrow ends of the inner bulwark member (1) and the outer bulwark member (3), and multiple plug slots that are arranged one-to-one with the plug connectors are evenly arranged circumferentially at both ends of the intermediate bulwark ring (2).

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