Cable box used on cable pipe of main unit of exposed deck of oil tanker

Abstract

The utility model relates to the technical field of ship electrical equipment, in particular to a cable box used on a cable pipe of a main unit of an exposed deck of an oil tanker. Comprising a box body, butt joint pipes are arranged on the two sides of the box body respectively, flanges connected with cable pipes are arranged at the ends of the butt joint pipes, the box body is of a bottom opening structure, outer edges are arranged on the periphery of the box body, a lower cover plate is arranged at the bottom of the box body, a hinge piece is arranged between one side of the lower cover plate and the box body, and locking pieces are arranged between the periphery of the lower cover plate and the box body at intervals. A cable supporting assembly is arranged in the box body. Through the design of the bottom hinged lower cover plate, the problem of inconvenience in operation due to the fact that a heavy box cover needs to be completely disassembled during high-altitude operation of a traditional upper cover opening type cable box is effectively solved, and the convenience of construction and maintenance is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of marine electrical equipment technology, specifically a cable box for use on the main unit cable pipe of an oil tanker's open deck. Background Technology

[0002] In the field of marine electrical installations, cable protection is a crucial aspect of ensuring navigational safety. According to the *China Shipbuilding Quality Standards* and international classification society regulations, cables in areas vulnerable to mechanical damage, such as open decks, must be protected using steel conduits, cable boxes, or other similar measures. This is particularly true for oil tankers, where the main cable conduit unit is typically 2 meters above the deck. While traditional open-top cable boxes meet standards, they present operational inconveniences. Classification societies such as DNV and CCS explicitly require that cables exposed to mechanical damage risks be protected with steel plates, steel conduits, or cable boxes, with particular attention paid to conduit drainage design and end protection.

[0003] The main challenge in installing cable boxes on oil tankers is that while traditional open-top designs meet protection requirements, the heavy cover must be completely removed for high-altitude operations, causing significant inconvenience for construction and maintenance. This structural flaw has led shipowners (especially foreign ones) to strongly demand improvements to the cover opening mechanism. Furthermore, details such as the abrasion-resistant design of the cable fixing mechanism, the box's sealing performance, and drainage capabilities directly impact cable lifespan and maintenance efficiency. Utility Model Content

[0004] The present invention aims to solve the above problems, thereby providing a cable box for use on the main unit cable pipe of the open deck of an oil tanker that is convenient to construct and maintain.

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

[0006] A cable box for use on the main unit cable duct of an open deck of an oil tanker includes a box body, with connecting pipes on both sides of the box body, and flanges connected to the cable ducts at the ends of the connecting pipes. The box body has an open bottom structure and an outer edge around its perimeter. A lower cover plate is provided at the bottom of the box body, with a hinge between one side of the lower cover plate and the box body. Locking elements are provided at intervals around the lower cover plate and the box body. A cable support assembly is provided inside the box body.

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

[0008] The bottom hinged cover design effectively solves the problem of the inconvenience of completely disassembling the heavy cover when working at heights with traditional top-opening cable boxes, significantly improving the convenience of construction and maintenance. The combination of the open bottom structure and the cover plate not only meets the classification society's specifications for cable protection but also optimizes the box's sealing performance. The combined design of the built-in cable support components and the connecting pipe fixing mechanism ensures cable protection while improving the smoothness and reliability of cable laying. The overall structure takes into account both the protection needs and operational convenience of the special environment of the open deck of an oil tanker, solving the pain points of traditional cable boxes in high-altitude operation scenarios.

[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 connector to facilitate the initial positioning and fixing of the cable when it enters the box, which helps to maintain the stability of the cable route and reduce the sway amplitude of the cable in the pipeline transition area.

[0011] Furthermore, the cable fixing mechanism includes a support plate fixed to the lower part of the inner cavity of the 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. The abrasion-resistant curved surface design can reduce the direct friction between the cable sheath and the metal parts. The spaced fixing holes allow the fixing position to be adjusted according to the cable specifications.

[0012] Furthermore, two sets of cable support assemblies are arranged in parallel inside the box to share the cable load, forming a double support structure and improving the stability of cable laying.

[0013] Furthermore, the cable support assembly includes a roller with its axis perpendicular to the cable axis. U-shaped brackets are provided on both sides of the inner wall of the cable box, and the two ends of the roller are rotatably connected in the brackets. A plastic sleeve is movably fitted over the roller. The combination of the roller and the plastic sleeve can provide rolling support during cable laying. By replacing sliding friction with rolling contact, the traction force required during cable laying can be reduced. The symmetrical arrangement of the U-shaped brackets makes the roller bear force evenly, which is beneficial to extending the service life of rotating parts.

[0014] Furthermore, the hinge includes an inverted L-shaped fixing seat, with several fixing seats spaced apart on one side of the housing. The end of the horizontal section of the fixing seat is fixed to the lower part of the side wall of the housing, and a fixing plate is hinged to the bottom of the fixing seat. The side of the fixing plate is fixed to the bottom of the lower cover plate, ensuring the flexibility of the opening and closing of the lower cover plate while providing a stable support point.

[0015] Furthermore, the locking component includes positioning seats spaced apart on the lower part of the side wall of the housing, with a screw hinged in the positioning seat. A U-shaped positioning clip corresponding to the positioning seat is provided extending outward from the bottom of the lower cover plate. The screw passes through the opening of the positioning clip, and a wing nut that abuts against the bottom of the positioning clip is screwed to the bottom of the screw. The U-shaped positioning clip enables quick alignment, the wing nut facilitates manual operation, and the spaced arrangement ensures uniform distribution of sealing pressure.

[0016] Furthermore, a drain hole is provided on the lower cover plate, and a drain plug is screwed into the drain hole. The drain plug can maintain daily sealing and drain accumulated water during maintenance to prevent long-term water accumulation in the box from causing corrosion.

[0017] Furthermore, an anti-detachment seat is provided on the lower cover plate, and an anti-detachment chain connected to the vent plug is provided on the anti-detachment seat. If the vent plug accidentally falls off during high-altitude operations, the risk of parts loss during maintenance is reduced, while maintaining the connection between the plug and the housing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the installation structure of an embodiment of the present utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the box body according to an embodiment of the present utility model;

[0020] Figure 3 This is a side sectional view of the box body according to an embodiment of the present utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the hinge component according to an embodiment of the present utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the cable support assembly according to an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the connection structure of the locking component in an embodiment of this utility model;

[0024] Figure 7 This is a top view of the tray structure according to an embodiment of the present invention;

[0025] Figure 8 This is a side view of the tray structure according to an embodiment of the present utility model;

[0026] Figure 9 This is a schematic diagram of the connection structure between the vent plug and the anti-detachment seat in an embodiment of this utility model;

[0027] The components in the diagram are marked as follows: 1. Box body; 2. Connecting pipe; 3. Support plate; 4. Fixing seat; 5. Fixing plate; 6. Positioning seat; 7. Screw; 8. Positioning clip; 9. Wing nut; 10. Discharge plug; 11. Anti-detachment seat; 12. Anti-detachment chain; 13. Lower cover plate; 14. Cable conduit; 15. Card seat; 16. Roller; 17. Plastic sleeve; 18. Outer edge. Detailed Implementation

[0028] 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.

[0029] A cable box for use on the main unit cable conduit of an open deck of an oil tanker includes a box body 1. Connecting pipes 2 are respectively provided on both sides of the box body 1. The inner end of the connecting pipe 2 extends 20mm into the box body 1 for easy welding. The inner end of the connecting pipe 2 is chamfered and ground to prevent cable abrasion. A flange connected to the cable conduit 14 is provided at the end of the connecting pipe 2. The box body 1 has an open bottom structure and an outer edge 18 around its perimeter. A lower cover plate 13 is provided at the bottom of the box body 1. A handrail is provided on the lower cover plate 13. The edge of the lower cover plate 13 fits against the outer edge 18 to ensure a seal. A hinge is provided between one side of the lower cover plate 13 and the box body 1. Locking elements are spaced apart between the lower cover plate 13 and the box body 1 around its perimeter. A cable support assembly is provided inside the box body 1.

[0030] Furthermore, a cable fixing mechanism is provided at the inner end of the connector 2 to facilitate the initial positioning and fixing of the cable when it enters the housing 1, which helps to maintain the stability of the cable route and reduce the sway amplitude of the cable in the pipe transition area.

[0031] Furthermore, the cable fixing mechanism includes a support plate 3 fixed in the lower part of the inner cavity of the connector 2. The length of the support plate 3 is 0.7 times the diameter of the connector 2. The length direction of the support plate 3 is perpendicular to the axis of the connector 2. The two sides of the support plate 3 are bent downward to form abrasion-resistant curved surface. After the two sides of the support plate 3 are bent, the angle between them and the bottom surface in the middle of the support plate 3 is 120°. Several fixing holes are spaced along the length direction on the support plate 3. The abrasion-resistant curved surface design can reduce the direct friction between the cable sheath and the metal parts. The spaced fixing holes facilitate the adjustment of the binding and fixing position according to the cable specifications.

[0032] Furthermore, two sets of cable support assemblies are arranged in parallel inside the housing 1. The two sets of cable support assemblies are located at the same height, which can share the cable load and form a double support structure to improve the stability of cable laying.

[0033] Furthermore, the cable support assembly includes a roller 16, the axis of which is perpendicular to the cable axis. U-shaped brackets 15 are respectively provided on both sides of the inner wall of the cable box. The two ends of the roller 16 are rotatably connected in the brackets 15. A plastic sleeve 17 is movably fitted over the roller 16. The height difference between the upper edge of the plastic sleeve 17 and the upper surface of the support plate 3 is between 100-150mm. The plastic sleeve 17 is made of ultra-high molecular weight polyethylene material with a Shore hardness of D65-D75 and a wall thickness of 5±0.2mm, exhibiting excellent wear resistance and self-lubricating properties. The combined structure of the roller 16 and the plastic sleeve 17 provides rolling support during cable laying. By replacing sliding friction with rolling contact, the traction force required during cable laying can be reduced. The symmetrical arrangement of the U-shaped brackets 15 ensures uniform force distribution on the roller 16, which helps extend the service life of rotating components.

[0034] Furthermore, the hinge includes an inverted L-shaped fixing seat 4. Several fixing seats 4 are spaced apart on one side of the housing 1. The end of the horizontal section of the fixing seat 4 is fixed to the lower part of the side wall of the housing 1. The bottom end of the fixing seat 4 is hinged to a fixing plate 5. The side of the fixing plate 5 is fixed to the bottom of the lower cover plate 13. When the fixing plate 5 is flipped to the bottom of the lower cover plate 13, the upper side of the fixing plate 5 is the welding surface to the bottom of the lower cover plate 13, which ensures the flexibility of opening and closing of the lower cover plate 13 while providing a stable support point.

[0035] Furthermore, the locking component includes positioning seats 6 spaced apart on the lower part of the side wall of the housing 1, with screws 7 hinged in the positioning seats 6, and U-shaped positioning clips 8 corresponding to the positioning seats 6 extending outward from the bottom of the lower cover plate 13. The screws 7 pass through the opening of the positioning clips 8, and a wing nut 9 that abuts against the bottom of the positioning clips 8 is screwed to the bottom of the screws 7. The U-shaped positioning clips 8 enable quick alignment, the wing nut 9 facilitates manual operation, and the spaced arrangement ensures uniform distribution of sealing pressure.

[0036] Furthermore, a drain hole is provided on the lower cover plate 13, and a drain plug 10 is screwed into the drain hole. The drain plug 10 can maintain daily sealing and drain accumulated water during maintenance to prevent long-term water accumulation in the box 1 from causing corrosion.

[0037] Furthermore, an anti-detachment seat 11 is provided on the lower cover plate 13, and an anti-detachment chain 12 connected to the vent plug 10 is provided on the anti-detachment seat 11. If the vent plug 10 falls accidentally during high-altitude operations, the risk of parts loss during maintenance is reduced, while maintaining the connection between the plug and the housing 1.

[0038] When laying or maintaining cables, the operator first loosens the wing nuts 9 around the lower cover plate 13, and flips the lower cover plate 13 downward through the bottom hinge structure to expose the internal space of the box 1. Then, the cable is introduced into the box 1 through the connecting pipe 2. The cable is first initially positioned by the cable fixing mechanism at the inner end of the connecting pipe 2. The anti-wear curved surface design of the support plate 3 avoids wear on the cable sheath, and the fixing hole can be adjusted according to the cable diameter to adjust the binding position. After the cable enters the box 1, it is supported by two sets of parallel cable support components. The rolling support structure of the roller 16 and the plastic sleeve 17 significantly reduces the traction resistance. After the cable laying is completed, the lower cover plate 13 is closed and the cover is evenly pressed by the locking device. In daily use, the drain hole and the drain plug 10 can effectively drain the accumulated water. The anti-detachment chain design 12 prevents the loss of parts during maintenance.

[0039] 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 box for use on a cable tray of a main unit on an open deck of an oil tanker, comprising a box body, two sides of the box body are respectively provided with a butt joint pipe, an end of the butt joint pipe is provided with a flange connected with the cable tray, characterized in that: The enclosure has an open bottom and an outer edge around its perimeter. A lower cover is provided at the bottom of the enclosure, with a hinge on one side of the lower cover and a locking mechanism between the lower cover and the enclosure. Cable support components are installed inside the enclosure.

2. A cable tray for an oil tanker open deck main unit cable tray according to claim 1, characterized in that: A cable fixing mechanism is installed at the inner end of the connector.

3. The cable box for the main unit cable conduit on the open deck of an oil tanker according to claim 2, characterized in that: The cable fixing mechanism includes a support plate fixed to the lower part of the inner cavity of the 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. A cable tray for use on a main deck unit cable tray of an oil tanker, according to claim 1, characterized in that: Two sets of cable support assemblies are arranged in parallel inside the box.

5. A cable tray for use on a main deck unit cable tray of an oil tanker, according to claim 4, characterised in that: The cable support assembly includes a roller with its axis perpendicular to the cable axis. U-shaped brackets are provided on both sides of the inner wall of the cable box. The two ends of the roller are rotatably connected in the brackets, and a plastic sleeve is movably fitted on the outside of the roller.

6. A cable tray for use on a main deck unit cable tray of an oil tanker, according to claim 1, characterized in that: The hinge includes an inverted L-shaped fixing seat, with several fixing seats spaced apart on one side of the housing. The end of the horizontal section of the fixing seat is fixed to the lower part of the side wall of the housing, and a fixing plate is hinged to the bottom of the fixing seat. The side of the fixing plate is fixed to the bottom of the lower cover plate.

7. A cable tray for use on a main deck unit cable tray of an oil tanker, according to claim 1, characterized in that: The locking component includes positioning seats spaced apart on the lower part of the side wall of the housing, with a screw hinged in the positioning seat. A U-shaped positioning clip corresponding to the positioning seat is provided on the bottom of the lower cover plate extending outward. The screw passes through the opening of the positioning clip, and a wing nut that abuts against the bottom of the positioning clip is screwed to the bottom of the screw.

8. A cable tray for use on a main deck unit cable tray of an oil tanker, according to claim 1, characterized in that: A drain hole is provided on the lower cover plate, and a drain plug is screwed into the drain hole.

9. A cable tray for use on a main deck unit cable tray of an oil tanker, according to claim 8, characterised in that: The lower cover plate is equipped with an anti-detachment seat, and the anti-detachment seat is equipped with an anti-detachment chain connected to the vent plug.

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