Vessel fair-leader sheath

Abstract

To provide a fair-leader sheath with improved service life.SOLUTION: A fair-leader sheath includes an inner bulwark member 1 and an outer bulwark member 3, the inner bulwark member and the outer bulwark member include a wide end with a great cross section and a narrow end with a small cross section, a parabola state outer drawing wall is provided between the wide end and the narrow end, an intermediate bulwark ring 2 is provided between the inner bulwark member and the outer bulwark member, and right and left ends of the intermediate bulwark ring are respectively adhered integrally to the narrow end of the inner bulwark member and the narrow end of the outer bulwark member. A seam formed on a joint of the narrow end of the intermediate bulwark ring and the inner bulwark member and the narrow end of the outer bulwark member are positioned on both right and left sides in a most narrow position of the sheath, the most narrow position in the sheath is composed of an intermediate bulwark ring in a complete structure, the structural strength of the fair-leader sheath in the narrowest position is reinforced, and wear in the narrowest position of the fair-leader sheath is alleviated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of ship mooring structures, and in particular to ship fairlead sheaths. [Background technology]

[0002] Fairleads, also called "shipboard rope holes", are closed-hole guide devices installed on shipboards to restrict the position of mooring ropes when leading them into a ship, and are circular or elliptical annular castings. Fairleads are usually made of cast iron or cast steel and are attached to shipboards. They guide the mooring ropes through the ship's hull while preventing the ropes from damaging the hull, so they are widely used in mooring ships and marine construction, and are an essential device for ships and marine construction.

[0003] When mooring lines are used in a fairlead for a long time, they are prone to break due to wear, which can cause accidents. Generally, a fairlead sheath is installed in the fairlead, which can reduce the wear of the mooring lines and avoid accidents of mooring lines breaking. In the prior art, a fairlead sheath is generally composed of a joint between an inner wall member and an outer wall member arranged symmetrically on the left and right, and the joint between the inner wall member and the outer wall member is generally designed at the narrowest part of the fairlead sheath. However, when a large tonnage ship is moored, the mooring line load is about 100 tons, and the maximum load-bearing area of ​​the fairlead sheath is located exactly in the narrowest area of ​​the fairlead, and the joint in the narrowest area affects the structural strength at that position, and the narrowest area is easily damaged by friction, which affects the service life of the fairlead sheath. Summary of the Invention [Means for solving the problem]

[0004] In response to the above-mentioned shortcomings of the prior art, the present application provides a ship fairlead sheath, in which the seams formed by the fairlead sheath are located on both the left and right sides of the narrowest point of the sheath, and the narrowest point of the fairlead sheath is composed of a complete intermediate side wall ring, which increases the structural strength of the narrowest point of the fairlead sheath, reduces wear at the narrowest point of the fairlead sheath, and improves the service life of the fairlead sheath.

[0005] The technical solutions adopted in this application are as follows: A ship fairlead sheath comprising an inner wall member and an outer wall member, the inner wall member and the outer wall member having a wide end with a large cross section and a narrow end with a small cross section, a parabolic outer extension wall being provided between the wide end and the narrow end, and an intermediate wall ring being provided between the inner wall member and the outer wall member, the left and right ends of the intermediate wall ring being integrally joined to the narrow end of the inner wall member and the narrow end of the outer wall member, respectively.

[0006] Furthermore, the inner wall member and the outer wall member have the same structure and are arranged symmetrically, and the inner wall member and the outer wall member have a truncated cone structure or a horn-shaped structure.

[0007] Furthermore, fairleads are provided in the central portions of the inner wall member and the outer wall member to guide the passage of mooring lines.

[0008] Furthermore, the intermediate side wall ring has a circular structure, and the cross section of the intermediate side wall ring becomes larger from the middle toward both the left and right ends.

[0009] Furthermore, a plurality of first bolt hole grooves are provided at the narrow end of the inner wall member, the plurality of first bolt hole grooves being uniformly distributed along the circumferential direction, a plurality of second bolt hole grooves are provided at the narrow end of the outer wall member, the plurality of second bolt hole grooves being uniformly distributed along the circumferential direction, the plurality of second bolt hole grooves and the plurality of first bolt hole grooves being arranged corresponding to each other, a plurality of third bolt hole grooves are provided on the intermediate wall ring, the plurality of third bolt hole grooves being uniformly distributed along the circumferential direction, the plurality of third bolt hole grooves and the plurality of first bolt hole grooves being arranged corresponding to each other, a butt bolt is provided in each second bolt hole groove, the threaded end of the butt bolt passes through the corresponding third bolt hole groove and the first bolt hole groove in sequence and is then connected to the nut, and a spacer is provided in each second bolt hole groove, the spacer covering the tip of the butt bolt.

[0010] Furthermore, a buffer layer is bonded to the outer surfaces of the inner wall member, the intermediate wall ring and the outer wall member.

[0011] Furthermore, the outer surface of the buffer layer is a rough surface having projections and recesses, and the rough surface has a wavy structure or a stepped structure.

[0012] Furthermore, an insertion mechanism is provided at both left and right ends of the intermediate wall ring, the narrow end of the inner wall member, and the narrow end of the outer wall member, and the left and right ends of the intermediate wall ring, the narrow end of the inner wall member, and the narrow end of the outer wall member are joined together by the insertion mechanism.

[0013] Furthermore, the plug-in mechanism includes a plug and a plug groove that engages with the plug, the plug is connected to the end faces of the narrow end of the inner wall member and the narrow end of the outer wall member, and the plug groove is opened on both left and right end faces of the intermediate wall ring and accommodates the insertion of the plug.

[0014] Furthermore, the plugs are provided in multiple sets evenly along the circumferential direction at the narrow ends of the inner wall member and the narrow ends of the outer wall member, and multiple plug grooves corresponding to the plugs respectively are evenly provided along the circumferential direction at both ends of the intermediate wall ring. Effect of the Invention

[0015] The present invention has the following beneficial effects: The joints formed at the joints of the intermediate side wall ring and the narrow end of the inner side wall member and the narrow end of the outer side wall member of the present invention are located on both the left and right sides of the narrowest position of the sheath, and the narrowest position of the sheath is composed of an integral intermediate side wall ring, which increases the structural strength of the narrowest position of the fairlead sheath, reduces the wear of the narrowest position of the fairlead sheath, and improves the service life of the ship fairlead sheath. The present invention installs an intermediate side wall ring at the narrowest position, greatly improving the effective load-bearing area at the narrowest position of the sheath, and improves the service life of the fairlead sheath. The sheath of the present invention has a double structure, and a buffer layer is installed on the outer surface of the inner side wall member, the intermediate side wall ring, and the outer side wall member, which can buffer the assembly pressure between the sheath and the mooring line holder, and the outer surface of the buffer layer is provided with a rough surface with a concave and convex shape, which forms a strong assembly structure between the sheath body and the fairlead by mutual pressure, and is easy to install. The buffer layer prevents the gap between the sheath and the mooring line holder, and improves sealing and rust prevention. The buffer layer provides the sheath with good buffering ability against the mooring line. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of the present invention. [Diagram 2] FIG. 2 is a front view of the present invention. [Diagram 3] FIG. 2 is a perspective view of an intermediate side wall ring of the present invention. [Figure 4] FIG. 2 is a front view of the inner wall member of the present invention. [Diagram 5] FIG. 4 is a rear view of the inner wall member of the present invention. [Figure 6] FIG. 2 is a front view of the outer wall member of the present invention. [Figure 7] FIG. 4 is a rear view of the outer wall member of the present invention. [Figure 8] FIG. 2 is a half cross-sectional view of the present invention. [Figure 9] FIG. 1 is a half cross-sectional view of a fairlead sheath in the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in conjunction with the drawings.

[0018] As shown in Figures 1 and 2, the ship fairlead sheath includes an inner wall member 1 and an outer wall member 3, which have the same structure and are arranged symmetrically on the left and right.

[0019] As shown in Figures 1 and 2, the inner wall member 1 and the outer wall member 3 include a wide end with a large cross-section and a narrow end with a small cross-section, and a parabolic outer extension wall is provided between the wide end and the narrow end. A fairlead 8 is provided in the center of the inner wall member 1 and the outer wall member 3 to guide the passage of mooring lines, and the inner wall member 1 and the outer wall member 3 have a truncated cone structure or a horn-shaped structure.

[0020] As shown in Figures 1 and 2, an intermediate wall ring 2 is provided between the inner wall member 1 and the outer wall member 3. The intermediate wall ring 2 has a circular ring structure, and the cross section of the intermediate wall ring 2 becomes smaller and larger from the middle toward the left and right ends. The left and right ends of the intermediate wall ring 2 are integrally joined to the narrow end of the inner wall member and the narrow end of the outer wall member, respectively. When in use, the connection point of the intermediate wall ring 2 and the narrow end of the inner wall member 1 forms one joint, and the connection point of the intermediate wall ring 2 and the narrow end of the outer wall member 3 forms a second joint, the two joints are located on both the left and right sides of the narrowest point of the sheath, and the narrowest point of the sheath is composed of the fully constructed intermediate wall ring 2, which increases the structural strength of the narrowest point of the fairlead sheath, reduces wear at the narrowest point of the fairlead sheath, and increases the service life of the fairlead sheath.

[0021] The inner wall member 1, the intermediate wall ring 2, and the outer wall portion 3 can be made of a metal material having excellent wear resistance, such as cast iron or cast steel. The inner wall member 1, the intermediate wall ring 2, and the outer wall portion 3 can also be made of a polyurethane material having excellent wear resistance.

[0022] As shown in Figures 3, 4 and 6, the narrow end of the inner wall member 1 is provided with a plurality of first bolt hole grooves 9, which are uniformly distributed along the circumferential direction, and the narrow end of the outer wall member 3 is provided with a plurality of second bolt hole grooves 10, which are uniformly distributed along the circumferential direction, and the second bolt hole grooves 10 and the first bolt hole grooves 9 are provided corresponding to each other. The middle wall ring 2 is provided with a plurality of third bolt hole grooves 11, which are uniformly distributed along the circumferential direction, and the third bolt hole grooves 11 and the first bolt hole grooves 9 are provided corresponding to each other. Each second bolt hole groove 10 is provided with a corresponding butt bolt 5, and the threaded end of the butt bolt 5 passes through the corresponding third bolt hole groove 11 and first bolt hole groove 9 in sequence before being connected to the nut 6. A spacer 7 is provided in each second bolt hole groove 10, and the spacer 7 covers the tip of the butt bolt 5. When in use, by providing the intermediate wall ring 2 (as shown in FIG. 8) at the narrowest position, the distance L1 between the bottom end face of the first bolt hole groove 9 and the bottom end face of the second bolt hole groove 10 of the present invention is narrower than when the intermediate wall ring 2 of the prior art is not provided (as shown in FIG. 9). By providing the intermediate wall ring 2 (as shown in FIG. 8) at the narrowest position, the distance L2 between the bottom end faces of the two bolt hole grooves in the prior art is larger than when the intermediate wall ring 2 of the prior art is not provided (as shown in FIG. 9). This significantly improves the effective force-receiving area at the narrowest position, thereby increasing the service life of the fairlead sheath.

[0023] As shown in Figures 3, 5 and 7, a buffer layer 4 is bonded to the outer surfaces of the inner wall member 1, the intermediate wall ring 2 and the outer wall member 3. The buffer layer 4 is made of an elastic material, and during assembly, the inner wall member 1, the intermediate wall ring 2 and the outer wall member 3 are pressed into the fairlead holder through the buffer layer 4, and the buffer layer 4 is used to buffer the pressure caused by the fairlead sheath and the fairlead holder pressing against each other.

[0024] The outer surface of the buffer layer 4 is a rough surface with unevenness, and the rough surface has a corrugated or stepped structure. Due to the uneven structure of the rough surface, when the fairlead sheath and the fairlead holder surface are assembled, the buffer layer 4 is pressed against them, and an assembly structure is formed in which the buffer layer 4 is tightly sealed against the fairlead holder surface during mutual pressing, improving the sealing property and rust prevention.

[0025] The assembly process of the present invention involves first joining the inner wall member 1 and the intermediate wall ring 2, then pressing the joined intermediate wall ring 2 into the fairlead holder, and then joining the other outer wall member 3 and the intermediate wall ring 2. During the assembly process, the buffer layer 4 forms a strong assembly structure on the surface of the fairlead holder through mutual pressing, preventing gaps from existing between the fairlead sheath and the fairlead holder, improving sealing properties and rust prevention.

[0026] The present invention can adopt another specific embodiment in which the intermediate wall ring 2, the inner wall member 1, and the outer wall member 3 are integrally joined. That is, plug-in mechanisms are provided on both left and right ends of the intermediate wall ring 2, the narrow end of the inner wall member 1, and the narrow end of the outer wall member 3, respectively, and the left and right ends of the intermediate wall ring 2, the narrow end of the inner wall member 1, and the narrow end of the outer wall member 3 are integrally joined by the plug-in mechanism. The plug-in mechanism includes a plug and a plug groove that engages with the plug, and the plug is connected to the end faces of the narrow end of the inner wall member 1 and the narrow end of the outer wall member 3, and the plug groove is opened on both left and right end faces of the intermediate wall ring 2 and accommodates the insertion of the plug. The plugs are provided in multiple sets evenly along the circumferential direction at the narrow end of the inner wall member 1 and the narrow end of the outer wall member 3, and multiple plug grooves corresponding to the plugs respectively are provided evenly along the circumferential direction at both ends of the intermediate wall ring 2.

[0027] The above description is an interpretation of the present invention, not a limitation of the present invention, and the scope of the present invention is limited by the claims, and any type of modification can be made within the scope of protection of the present invention. [Explanation of symbols]

[0028] 1, inner wall member; 2, intermediate wall ring; 3, outer wall member; 4, buffer layer; 5, butt bolt; 6, nut; 7, spacer; 8, fairlead; 9, first bolt hole groove; 10, second bolt hole groove; 11, third bolt hole groove.

Claims

1. A ship fairlead sheath comprising an inner wall member (1) and an outer wall member (3), the inner wall member (1) and the outer wall member (3) each having a wide end with a large cross section and a narrow end with a small cross section, and a parabolic outer extension wall is provided between the wide end and the narrow end, A ship fairlead sheath characterized in that an intermediate wall ring (2) is provided between the inner wall member (1) and the outer wall member (3), and the left and right ends of the intermediate wall ring (2) are integrally joined to the narrow end of the inner wall member (1) and the narrow end of the outer wall member (3), respectively.

2. The ship fairlead sheath according to claim 1, characterized in that the inner wall member (1) and the outer wall member (3) have the same structure and are arranged symmetrically, and the inner wall member (1) and the outer wall member (3) have a truncated cone structure or a horn-shaped structure.

3. 3. A ship fairlead sheath as claimed in claim 2, characterized in that a fairlead (8) for guiding the passage of mooring lines is provided in the central portion of the inner wall member (1) and the outer wall member (3).

4. 4. A ship fairlead sheath according to claim 3, characterized in that the intermediate side wall ring (2) has a circular structure, and the cross section of the intermediate side wall ring (2) becomes larger from the center toward both left and right ends.

5. The narrow end of the inner wall member (1) is provided with a plurality of first bolt hole grooves (9), the plurality of first bolt hole grooves (9) being uniformly distributed along the circumferential direction; the narrow end of the outer wall member (3) is provided with a plurality of second bolt hole grooves (10), the plurality of second bolt hole grooves (10) being uniformly distributed along the circumferential direction, the plurality of second bolt hole grooves (10) corresponding to the plurality of first bolt hole grooves (9) one by one; the intermediate wall ring (2) is provided with a plurality of third bolt hole grooves (11), the plurality of third bolt hole grooves (11) being uniformly distributed along the circumferential direction, and the plurality of 5. The ship fairlead sheath according to claim 4, wherein the third bolt hole grooves (11) and the first bolt hole grooves (9) are provided in a corresponding relationship, each second bolt hole groove (10) is provided with a corresponding butt bolt (5), the threaded end of the butt bolt (5) passes through the corresponding third bolt hole groove (11) and the corresponding first bolt hole groove (9) in sequence and is then connected to the nut (6), and each second bolt hole groove (10) is provided with a corresponding spacer (7), and the spacer (7) covers the tip of the butt bolt (5).

6. 2. A ship fairlead sheath according to claim 1, characterized in that a buffer layer (4) is bonded to the outer surfaces of the inner side wall member (1), the intermediate side wall ring (2) and the outer side wall member (3).

7. 7. A ship fairlead sheath as claimed in claim 6, characterized in that the outer surface of the buffer layer (4) is a rough surface having irregularities, the rough surface having a corrugated structure or a stepped structure.

8. A ship fairlead sheath as described in claim 1, characterized in that an insertion mechanism is provided at both left and right ends of the intermediate side wall ring (2), the narrow end of the inner side wall member (1), and the narrow end of the outer side wall member (3), and the left and right ends of the intermediate side wall ring (2), the narrow end of the inner side wall member (1), and the narrow end of the outer side wall member (3) are joined together by the insertion mechanism.

9. The ship fairlead sheath according to claim 8, characterized in that the plug-in mechanism includes a plug and a plug groove for engaging with the plug, the plug is connected to the narrow end face of the inner wall member (1) and the narrow end face of the outer wall member (3), and the plug groove is opened on both left and right end faces of the intermediate wall ring (2) and accommodates the insertion of the plug.

10. A ship fairlead sheath as described in claim 9, characterized in that the plugs are provided in multiple sets evenly along the circumferential direction at the narrow end of the inner wall member (1) and the narrow end of the outer wall member (3), and a plurality of plug grooves corresponding to the plugs respectively are provided evenly along the circumferential direction at both ends of the intermediate wall ring (2).

Images