Submarine cable drag reduction device for beach section

Abstract

The utility model discloses a submarine cable drag reduction device for a beach section, which comprises a carrier roller, two supports and two supporting assemblies, the two supporting assemblies are respectively arranged at the upper ends of the two supports, and the two ends of the carrier roller are respectively sleeved on the two supporting assemblies; wherein the supporting assembly comprises a bearing seat, a core shaft, an expansion sleeve and an expansion disc, the bearing seat is installed on the support, one end of the core shaft is installed in the bearing seat, the core shaft is sleeved with the expansion sleeve and the expansion disc, the expansion sleeve is at least partially arranged on the outer side of the expansion disc in a sleeving mode, and the expansion disc is movably arranged in the axial direction of the core shaft; an annular conical surface is formed on the outer edge of the expansion disc, the outer contour of the end, away from the bearing seat, of the expansion sleeve can be arranged in a radial deformation mode, the outer edge of one end of the bearing seat abuts against the inner edge of the carrier roller, and the annular conical surface abuts against the expansion sleeve. Through the application of the submarine cable speed reducing device, the submarine cable speed reducing device suitable for the beach section is provided, normal operation of traction work is facilitated, the overall efficiency of submarine cable construction is improved, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of submarine cable construction, in particular to a submarine cable drag reduction device used in a shore section. Background Art

[0002] At present, during the landing operation of submarine cables, they generally have to pass through the intertidal zone, the beach section, and then cross the embankment and the pre-made submarine cable trench to reach the terminal substation built on land. According to the landing distance of the submarine cable and the characteristics of the path along the way, most of the operations are completed by winches or crawler tractors and manual assistance. In order to minimize the traction resistance of the submarine cable, avoid excessive force on the submarine cable, prevent the anti-corrosion material wrapped on the outer layer of the submarine cable from being damaged, and reduce equipment investment and labor intensity of operators, the measures generally taken are: when the submarine cable is towed in the intertidal zone, an inflatable airbag is tied to the submarine cable so that the submarine cable is towed ashore in a floating state; when towing the beach section, a steel pipe is used to pad the lower part of the submarine cable to prevent it from rubbing against the beach surface.

[0003] However, the submarine cable that enters the beach section from the intertidal zone is affected by the water flow, and its position is constantly displaced in an uncertain direction during the towing operation, causing the steel pipe installed at the bottom of the submarine cable to be displaced by the lateral force; secondly, the bottom of the beach section is soft sand or swamp, and drag reduction facilities such as steel pipes are easily trapped in it and difficult to recover; making the above-mentioned drag reduction measures very easy to fail in this area, and also requiring a waste of manpower to adjust them at all times. Utility Model Content

[0004] In view of this, in order to solve the above problems, the purpose of the utility model is to provide a drag reduction device for a submarine cable in a shore section, comprising: a roller, two brackets and two support assemblies, the two support assemblies are respectively arranged at the upper ends of the two brackets, and the two ends of the roller are respectively sleeved on the two support assemblies;

[0005] The support assembly comprises: a bearing seat, a core shaft, an expansion sleeve and an expansion plate, the bearing seat is mounted on the bracket, one end of the core shaft is mounted in the bearing seat, the core shaft is sleeved with the expansion sleeve and the expansion plate, the expansion sleeve is at least partially sleeved on the outer side of the expansion plate, and the expansion plate is movably arranged along the axial direction of the core shaft;

[0006] An annular conical surface is formed on the outer edge of the expansion plate, and the outer diameter of the annular conical surface is gradually reduced in the direction approaching the bearing seat. The outer contour of the end of the expansion sleeve away from the bearing seat can be radially deformed. The outer edge of one end of the bearing seat abuts against the inner edge of the roller, and the annular conical surface abuts against the expansion sleeve.

[0007] In another preferred embodiment, the core shaft is connected to the expansion plate via threads.

[0008] In another preferred embodiment, an outer side of the other end of the core shaft is axially provided with an external thread, a threaded hole is provided at the center of the expansion plate, and the external thread is threadedly connected to the threaded hole.

[0009] In another preferred embodiment, the expansion sleeve includes: an annular portion and a plurality of extension portions, the annular portion is sleeved on the core shaft, each of the extension portions is extended along the axial direction of the core shaft, one end of each of the extension portions is connected to the annular portion, and the plurality of extension portions are arranged in sequence along the circumferential direction of the annular portion.

[0010] In another preferred embodiment, there is a gap between each two adjacent extension portions.

[0011] In another preferred embodiment, one end of the core shaft extends outward and protrudes from an end of the bearing seat away from the expansion sleeve.

[0012] In another preferred embodiment, one end of the expansion sleeve away from the bearing seat is radially contracted and forms an annular step surface, and the roller sleeve is arranged on the annular step surface.

[0013] In another preferred embodiment, the bracket includes: a base plate and a frame body, the base plate is arranged in a horizontal direction, the frame body is arranged at the upper end of the base plate, and the bearing seat is installed at the upper end of the frame body.

[0014] In another preferred embodiment, the frame includes: a vertical portion and two triangular reinforcement portions, the vertical portion is arranged along the vertical direction, the lower end of the vertical portion is connected to the base plate, the two triangular reinforcement portions are respectively arranged on both sides of the vertical portion, and each of the triangular reinforcement portions is connected to the base plate.

[0015] In another preferred embodiment, the horizontal cross-section of the bottom plate is rectangular.

[0016] Due to the adoption of the above technical solution, the utility model has the following positive effects compared with the prior art:

[0017] Through the application of the utility model, a submarine cable deceleration device suitable for the shore section is provided, which is conducive to the normal progress of the traction work, improves the overall efficiency of the submarine cable construction, and reduces the labor cost; the utility model has a simple structure, strong stability, and is not prone to overturning and failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of a drag reduction device for a submarine cable in a beach section of the utility model;

[0019] Figure 2It is a partial enlarged view of a drag reduction device for a submarine cable in a beach section according to the utility model.

[0020] In the attached figure:

[0021] 1. Roller; 2. Bracket; 3. Support assembly; 4. Bearing seat; 5. Mandrel; 6. Expansion sleeve; 7. Expansion plate; 8. Annular cone; 9. External thread; 10. Threaded hole; 11. Annular portion; 12. Extension portion; 13. Spacer; 14. Annular step surface; 15. Bottom plate; 16. Frame; 17. Vertical portion; 18. Triangular reinforcement portion. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0023] like Figure 1 and Figure 2 As shown, a preferred embodiment of a drag reduction device for a submarine cable in a shore section is shown, comprising: a roller 1, two brackets 2 and two support assemblies 3, the two support assemblies 3 are respectively arranged at the upper ends of the two brackets 2, and the two ends of the roller 1 are respectively sleeved on the two support assemblies 3; wherein the support assembly 3 comprises: a bearing seat 4, a core shaft 5, an expansion sleeve 6 and an expansion plate 7, the bearing seat 4 is installed on the bracket 2, one end of the core shaft 5 is installed in the bearing seat 4, the core shaft 5 is sleeved with an expansion sleeve 6 and an expansion plate 7, the expansion sleeve 6 is at least partially sleeved on the outside of the expansion plate 7, and the expansion plate 7 is movably arranged along the axial direction of the core shaft 5; an annular conical surface 8 is formed on the outer edge of the expansion plate 7, and the outer diameter of the annular conical surface 8 is gradually reduced in the direction approaching the bearing seat 4, and the outer contour of the expansion sleeve 6 away from the bearing seat 4 can be radially deformed, the outer edge of one end of the bearing seat 4 is against the inner edge of the roller 1, and the annular conical surface 8 is against the expansion sleeve 6. Furthermore, through the cooperation of the support assembly 3 and the bracket 2, the roller 1 is relatively positioned and placed on the ground of the shore section where the submarine cable is constructed, and then the rotatable roller 1 is used as the supporting position of the submarine cable, so that the submarine cable is in rolling friction contact with the roller 1 during the movement, thereby reducing the friction resistance of the submarine cable in the shore section; further, during the installation process, the annular cone 8 can be driven to move by the expansion plate 7 so that the outer edge of the end of the expansion sleeve 6 away from the bearing seat 4 can be expanded to tightly abut against the inner side of the roller 1, thereby facilitating the installation and disassembly of the roller 1 and further improving the stability of the overall installation of the device.

[0024] Further, as a preferred embodiment, one end of the core shaft 5 is rotatably disposed in the bearing seat 4, the expansion sleeve 6 is rotatably sleeved on the outer circumference of the core shaft 5, and the expansion sleeve 6 and the roller 1 are relatively fixedly disposed.

[0025] Further, as a preferred embodiment, the mandrel 5 is connected to the expansion plate 7 by threads. Further, the end of the mandrel 5 is a screw structure to cooperate with the expansion plate 7 thread, and the mandrel 5 can rotate relative to the expansion plate 7 so that the expansion plate 7 moves axially along the thread, thereby driving the movement of the annular cone 8.

[0026] Furthermore, as a preferred embodiment, an external thread 9 is axially arranged on the outer side of the other end of the core shaft 5, a threaded hole 10 is provided at the center of the expansion plate 7, and the external thread 9 and the threaded hole 10 are threadedly connected.

[0027] Furthermore, as a preferred embodiment, the expansion sleeve 6 includes: an annular portion 11 and a plurality of extension portions 12, the annular portion 11 is sleeved on the core shaft 5, each extension portion 12 is extended along the axial direction of the core shaft 5, one end of each extension portion 12 is connected to the annular portion 11, and the plurality of extension portions 12 are arranged in sequence along the circumferential direction of the annular portion 11.

[0028] Further, as a preferred embodiment, the extension portion 12 is disposed on the inner side of the roller 1 as a deformable portion, and the annular portion 11 is disposed on the outer side of the roller 1 .

[0029] Furthermore, as a preferred embodiment, there is a gap 13 between each two adjacent extension portions 12 .

[0030] Further, as a preferred embodiment, one end of the mandrel 5 extends outward and protrudes from the end of the bearing seat 4 away from the expansion sleeve 6. Further, the protruding position of the mandrel 5 can be connected to an external attachment device, and the attachment device is at least used to provide torque to drive the mandrel 5 to rotate.

[0031] Furthermore, as a preferred embodiment, in order to allow the core shaft 5 to rotate relative to the expansion plate 7, the expansion sleeve 6 can be fixed by an external fixing device to prevent it from rotating.

[0032] Furthermore, as a preferred embodiment, it also includes: an anti-rotation structure, which is used to prevent the expansion plate 7 from rotating. Further, the anti-rotation structure can preferably be two contact surfaces between the outer periphery of the expansion plate 7 and the inner periphery of the expansion sleeve 6, and the two contact surfaces can generate sufficient friction to overcome the rotation tendency of the expansion plate 7; the contact surface can be provided with anti-skid lines extending along the axial direction, so that the two contact surfaces can provide sufficient friction through the anti-skid lines; in addition, the anti-rotation structure can also be a protrusion protruding outward from the outer periphery of the expansion plate 7, and the protrusion can extend into the above-mentioned interval 13 to form a card.

[0033] Furthermore, as a preferred embodiment, one end of the expansion sleeve 6 away from the bearing seat 4 is radially contracted and forms an annular step surface 14 , and the roller 1 is sleeved on the annular step surface 14 .

[0034] Further, as a preferred embodiment, the annular step surface 14 includes at least a radial extension portion 12 and an axial extension portion 12. The axial extension portion 12 extends into the roller 1, and the radial extension portion 12 is arranged at one end of the roller 1 along the axial direction to prevent the roller 1 from axially moving.

[0035] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention.

[0036] The utility model also has the following implementation methods based on the above:

[0037] In a further embodiment of the utility model, the bracket 2 includes: a bottom plate 15 and a frame 16, the bottom plate 15 is arranged in the horizontal direction, the frame 16 is arranged at the upper end of the bottom plate 15, and the upper end of the frame 16 is installed with a bearing seat 4. Further, the base area between the device and the ground is increased by the bottom plate 15 to prevent displacement.

[0038] In a further embodiment of the utility model, the frame 16 includes: a vertical portion 17 and two triangular reinforcement portions 18, the vertical portion 17 is arranged along the vertical direction, the lower end of the vertical portion 17 is connected to the bottom plate 15, the two triangular reinforcement portions 18 are respectively arranged on both sides of the vertical portion 17, and each triangular reinforcement portion 18 is connected to the bottom plate 15.

[0039] In a further embodiment of the present invention, the horizontal cross-section of the bottom plate 15 is rectangular.

[0040] In a further embodiment of the present invention, the horizontal cross-section of the bottom plate 15 is preferably a square structure with a length of 400 mm.

[0041] In a further embodiment of the present invention, the roller 1 is preferably a seamless steel pipe with an outer diameter of 159 mm.

[0042] In a further embodiment of the present invention, the maximum length of the roller 1 is preferably 15 m.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A drag reduction device for a submarine cable in a beach section, characterized in that: include: A roller, two brackets and two support assemblies, wherein the two support assemblies are respectively arranged at the upper ends of the two brackets, and the two ends of the roller are respectively sleeved on the two support assemblies; The support assembly comprises: a bearing seat, a core shaft, an expansion sleeve and an expansion plate, the bearing seat is mounted on the bracket, one end of the core shaft is mounted in the bearing seat, the core shaft is sleeved with the expansion sleeve and the expansion plate, the expansion sleeve is at least partially sleeved on the outer side of the expansion plate, and the expansion plate is movably arranged along the axial direction of the core shaft; An annular conical surface is formed on the outer edge of the expansion plate, and the outer diameter of the annular conical surface is gradually reduced in the direction approaching the bearing seat. The outer contour of the end of the expansion sleeve away from the bearing seat can be radially deformed. The outer edge of one end of the bearing seat abuts against the inner edge of the roller, and the annular conical surface abuts against the expansion sleeve.

2. The drag reduction device for a submarine cable in a beach section according to claim 1 is characterized in that: The core shaft is connected to the expansion plate through threads.

3. The drag reduction device for a submarine cable in a beach section according to claim 2 is characterized in that: The outer side of the other end of the core shaft is axially provided with an external thread, and a threaded hole is provided at the center of the expansion plate, and the external thread is threadedly connected with the threaded hole.

4. The drag reduction device for a submarine cable in a beach section according to claim 1 is characterized in that: The expansion sleeve includes: an annular portion and a plurality of extension portions, wherein the annular portion is sleeved on the core shaft, each of the extension portions is extended along the axial direction of the core shaft, one end of each of the extension portions is connected to the annular portion, and the plurality of extension portions are sequentially arranged along the circumferential direction of the annular portion.

5. The drag reduction device for a submarine cable in a beach section according to claim 4 is characterized in that: There is a gap between each two adjacent extension parts.

6. The drag reduction device for a submarine cable in a beach section according to claim 1, characterized in that: One end of the core shaft extends outward and protrudes from an end of the bearing seat away from the expansion sleeve.

7. The drag reduction device for a submarine cable in a beach section according to claim 1, characterized in that: One end of the expansion sleeve away from the bearing seat is radially contracted to form an annular step surface, and the roller sleeve is arranged on the annular step surface.

8. The drag reduction device for a submarine cable in a beach section according to claim 1, characterized in that: The bracket comprises: a bottom plate and a frame body, the bottom plate is arranged in a horizontal direction, the frame body is arranged at the upper end of the bottom plate, and the bearing seat is installed at the upper end of the frame body.

9. The drag reduction device for a submarine cable in a beach section according to claim 8, characterized in that: The frame includes: a vertical portion and two triangular reinforcement portions, the vertical portion is arranged along the vertical direction, the lower end of the vertical portion is connected to the bottom plate, the two triangular reinforcement portions are respectively arranged on both sides of the vertical portion, and each triangular reinforcement portion is connected to the bottom plate.

10. The drag reduction device for a submarine cable in a beach section according to claim 8, characterized in that: The horizontal cross section of the bottom plate is rectangular.

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