Cable protection device installed at bow position of ultra-large oil steamship

Abstract

The utility model relates to the technical field of ship electrical equipment, in particular to a cable protection device installed at the bow position of an ultra-large oil ship. Comprising a cable box located at a bow, a first butt-joint pipe is arranged on the side face, away from the bow, of the cable box, a second butt-joint pipe is arranged at the bottom of the cable box, butt-joint flanges connected with the cable pipe are arranged at the ends of the first butt-joint pipe and the second butt-joint pipe, an inclined opening is formed in the top, close to the bow side, of the cable box, and a box cover is arranged on the inclined opening of the cable box. A cable transition mechanism is arranged in the cable box and located between the first butt joint pipe and the second butt joint pipe. By arranging the cable box structure with the inclined opening, the problem of seawater retention caused by the top plane design of a traditional box body is effectively solved, and the sea wave impact resistance of the bow position cable protection device is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of marine electrical equipment technology, specifically a cable protection device installed at the bow of a very large oil tanker. Background Technology

[0002] Oil tankers have many more systems than ordinary ships, so for ease of layout, the main cable conduit units are located approximately 2 meters above the deck. Furthermore, for Very Large Crude Carriers (VLCCs), the bow structure is below the main deck at the bow, meaning that bow inlet cables must pass through the lower part of the cable box, through cable conduits, and across empty compartments to reach the bow. Figure 1 As shown.

[0003] Prior art (201921891041.9) discloses a cable transition box for oil tankers, including a box body, a cable conduit for threading cables, a partition fixed inside the box body along the cable laying direction, and rollers disposed between the partition and the inner wall of the box body. The cable conduit is fixed to the outer sides of two opposite side walls of the box body. Multiple rollers arranged at different heights are provided on both sides of the partition, and the two ends of each roller are fixed to the partition and the inner wall of the box body respectively by roller brackets. Although the transition box in the above technology can effectively protect the cables, during navigation, waves frequently hit the bow position. If a box with the above structure is used at the bow position, seawater will remain on the cover plate, which will corrode the cable protection device over time, leading to a reduction in its service life. Utility Model Content

[0004] The present invention aims to solve the above problems, thereby providing a cable protection device installed at the bow of a very large oil tanker to prevent seawater from accumulating.

[0005] The technical solution adopted by this utility model to solve the aforementioned problem is:

[0006] A cable protection device installed at the bow of a very large crude carrier includes a cable box located at the bow. A first pair of connectors is provided on the side of the cable box away from the bow, and a second pair of connectors is provided at the bottom of the cable box. Both the first and second pairs of connectors are provided with mating flanges at their ends that connect to cable pipes. The top of the cable box near the bow is provided with an oblique opening, and a box cover is provided on the oblique opening. A cable transition mechanism is provided inside the cable box and between the first and second pairs of connectors.

[0007] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0008] By designing a cable box structure with an angled opening, the problem of seawater retention caused by the traditional flat top design of the box is effectively solved, significantly improving the wave impact resistance of the cable protection device at the bow. The flange connection between the butt joint and the cable conduit ensures the sealing of the cable channel. The optimized transition mechanism design ensures smooth cable turning within the box, avoiding cable bending damage caused by traditional structures. The overall structure is specially designed for the harsh environment at the bow, effectively reducing the risk of seawater accumulation while maintaining protective performance, and extending the service life of the device in corrosive environments such as salt spray and waves.

[0009] As a preferred embodiment, a further technical solution of this utility model is:

[0010] Furthermore, a cable fixing mechanism is provided at the inner end of the first connector.

[0011] Furthermore, the cable fixing mechanism includes a support plate fixed to the lower part of the inner cavity of the first connector. The length direction of the support plate is perpendicular to the axis of the connector. The two sides of the support plate are bent downward to form an anti-abrasion curved surface. Several fixing holes are spaced apart along the length direction of the support plate. The anti-abrasion curved surface design forms a smooth transition surface, which reduces the risk of cable sheath abrasion compared with the right-angle fixing method in the prior art. The spaced fixing hole structure provides multiple fixing options, enabling the device to adapt to the binding requirements of cables of different specifications and improving overall adaptability.

[0012] Furthermore, the transition mechanism includes a roller disposed between the first pair of connectors and the second pair of connectors. The roller axis is perpendicular to the cable axis. U-shaped brackets are respectively provided on both sides of the inner wall of the cable box. The two ends of the roller are rotatably connected in the brackets. A plastic sleeve is movably fitted on the outside of the roller. The combination structure of the U-shaped bracket and the roller is easier to maintain and replace than the traditional welded bracket, and can evenly distribute the force. The matching design of the plastic sleeve and the roller forms rolling contact when the cable turns, which helps to reduce frictional resistance during the laying process.

[0013] Furthermore, the cable box has a sloping opening with a side plate on the outer edge, a rubber gasket between the box cover and the side plate, and connecting bolts evenly distributed between the box cover and the side plate. The sloping opening, together with the box cover, forms a flow guiding surface, which is more conducive to draining water accumulated by the impact of waves compared with a flat box. The rubber gasket ensures the sealing performance while allowing the box cover to produce a small amount of deformation when impacted.

[0014] Furthermore, a set of handles is provided on the top of the lid, which is easier to operate than a single-sided handle.

[0015] Furthermore, the bottom of the cable box is equipped with a drain hole and a drain plug. The drain plug has a dual function: it ensures the sealing during normal use and facilitates the removal of any small amount of water that may accidentally enter during maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation structure of a traditional cable box in the background art;

[0017] Figure 2 This is a schematic diagram of the overall structure during installation of an embodiment of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the cable box according to an embodiment of the present utility model;

[0019] Figure 4 This is a side sectional view of the cable box according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the main structure of the tray in an embodiment of the present utility model;

[0021] Figure 6 This is a top view of the tray structure according to an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the overall structure of the transition mechanism in an embodiment of this utility model;

[0023] The following are marked in the diagram: 1. Cable box; 2. First connector; 3. Second connector; 4. Box cover; 5. Support plate; 6. Roller; 7. Card holder; 8. Plastic sleeve; 9. Drain plug. Detailed Implementation

[0024] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0025] A cable protection device installed at the bow of a very large crude carrier includes a cable box 1 located at the bow. The cable box 1 is galvanized or zinc-immersed. A first pair of connectors 2 is provided on the side of the cable box 1 away from the bow, and a second pair of connectors 3 is provided at the bottom of the cable box 1. Both the first pair of connectors 2 and the second pair of connectors 3 are provided with connecting flanges for connecting to cable pipes. The inner ends of the first pair of connectors 2 and the second pair of connectors 3 extend 20mm into the cable box 1 for easy welding. The inner ends of the first pair of connectors 2 and the second pair of connectors 3 are chamfered and ground to prevent wear on the cable. The top of the cable box 1 near the bow has a slanted opening, and a box cover 4 is provided on the slanted opening of the cable box 1. The thickness of the traditional cable box is 8mm. To increase the service life at the bow, the thickness of the cable box 1 and the box cover 4 is changed to 12mm. A cable transition mechanism is provided inside the cable box 1 and between the first pair of connectors 2 and the second pair of connectors 3. The use of a slanted opening cable box 1 and a flow guide box cover 4 effectively solves the problem of seawater retention in traditional flat boxes. The slanted design allows for rapid drainage of accumulated water when impacted by waves.

[0026] Furthermore, a cable fixing mechanism is provided at the inner end of the first connector 2.

[0027] Furthermore, the cable fixing mechanism includes a support plate 5 fixed to the lower part of the inner cavity of the first connector 2. The length of the support plate 5 is 0.7 times the diameter of the first connector 2. The length direction of the support plate 5 is perpendicular to the axis of the connector. The two sides of the support plate 5 are bent downward to form abrasion-resistant curved surfaces. The angle between the two sides of the support plate 5 and the bottom surface of the middle part of the support plate 5 after bending is 120 degrees. Several fixing holes are spaced apart along the length direction on the support plate 5. The abrasion-resistant curved surface design forms a smooth transition surface, which can reduce the risk of cable sheath abrasion compared with the right-angle fixing method in the prior art. The spaced fixing hole structure provides multiple fixing options, enabling the device to adapt to the binding requirements of cables of different specifications and improving overall adaptability.

[0028] Furthermore, the transition mechanism includes a roller 6 disposed between the first pair of connectors 2 and the second pair of connectors 3. The axis of the roller 6 is perpendicular to the cable axis. U-shaped brackets 7 are respectively disposed on both sides of the inner wall of the cable box 1. The two ends of the roller 6 are rotatably connected in the brackets 7. A plastic sleeve 8 is movably fitted on the outside of the roller 6. The height difference between the upper edge of the plastic sleeve 8 and the upper surface of the support plate 5 is 100mm. The plastic sleeve 8 is made of ultra-high molecular weight polyethylene material with a Shore hardness of D65-D75 and a wall thickness of 5±0.2mm. It has excellent wear resistance and self-lubricating properties. The combination structure of the U-shaped bracket 7 and the roller 6 is easier to maintain and replace than the traditional welded bracket, and can evenly distribute the force. The matching design of the plastic sleeve 8 and the roller 6 forms rolling contact when the cable turns, which helps to reduce frictional resistance during the laying process.

[0029] Furthermore, the cable box 1 has a sloping opening with a side plate on the outer edge, a rubber gasket between the box cover 4 and the side plate, and connecting bolts evenly distributed between the box cover 4 and the side plate. The sloping opening and the box cover 4 form a flow guide surface, which is more conducive to draining water caused by the impact of waves compared with a flat box. The rubber gasket ensures the sealing performance while allowing the box cover 4 to undergo slight deformation when impacted.

[0030] Furthermore, a set of handles is provided on the top of the lid 4, which is easier to operate than a single-sided handle.

[0031] Furthermore, the bottom of the cable box 1 is provided with a drain hole and a drain plug 9. The drain hole is a threaded hole, and the drain plug 9 has a dual function: it ensures the sealing during normal use and facilitates the drainage of a small amount of water that may accidentally enter during maintenance.

[0032] By designing a cable box 1 structure with an angled opening, the problem of seawater retention caused by the traditional flat top design of the box is effectively solved, significantly improving the wave impact resistance of the cable protection device at the bow position. The flange connection between the butt joint and the cable conduit ensures the sealing of the cable channel. The optimized transition mechanism design ensures smooth cable turning within the box, avoiding cable bending damage caused by traditional structures. The overall structure is specially designed for the harsh environment at the bow, effectively reducing the risk of seawater accumulation while maintaining protective performance, and extending the service life of the device in corrosive environments such as salt spray and waves.

[0033] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A cable protection device installed at the bow of a very large crude carrier (VLCC), comprising a cable box located at the bow, a first pair of connecting pipes disposed on the side of the cable box away from the bow, and a second pair of connecting pipes disposed at the bottom of the cable box, wherein both the first and second pairs of connecting pipes are provided with mating flanges for connecting to cable conduits, characterized in that: The cable box has a slanted opening at the top near the bow side, and a cover is provided on the slanted opening. A cable transition mechanism is provided inside the cable box and between the first pair of pipes and the second pair of pipes.

2. A cable protection device for installation at a bow location of a very large crude carrier as claimed in claim 1, characterised in that: The first connector has a cable fixing mechanism installed at its inner end.

3. A cable protection device for installation at a bow location of a very large crude carrier as claimed in claim 2, characterised in that: The cable fixing mechanism includes a support plate fixed to the lower part of the inner cavity of the first connector. The length direction of the support plate is perpendicular to the axis of the connector. The two sides of the support plate are bent downward to form abrasion-resistant curved surface. Several fixing holes are spaced apart along the length direction on the support plate.

4. The cable protection device installed at the bow position of a very large crude carrier according to claim 1, characterized by: The transition mechanism includes a roller disposed between the first pair of connectors and the second pair of connectors. The roller axis is perpendicular to the cable axis. U-shaped brackets are respectively provided on both sides of the inner wall of the cable box. The two ends of the roller are rotatably connected in the brackets. A plastic sleeve is movably fitted on the outside of the roller.

5. The cable protection device installed at the bow position of a very large crude carrier according to claim 1, wherein: The cable box has a sloping opening with a sill plate on the outer edge, a rubber gasket between the box cover and the sloping plate, and connecting bolts evenly distributed between the box cover and the sloping plate.

6. A cable protection device for installation at a bow location of a very large crude carrier as claimed in claim 5, characterised in that: A set of handrails is provided on the top of the box lid.

7. The cable protection device installed at the bow position of a very large crude carrier according to claim 1, wherein: The bottom of the cable box is equipped with a drain hole and a drain plug.

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