A submarine cable protective sleeve auxiliary laying device

By designing an auxiliary laying device for submarine cable protective sleeves and utilizing the automated lifting structure of the submarine cable conveying platform and the sleeve lifting platform, the problem of low efficiency in manual installation of submarine cable sleeves was solved, and efficient laying of submarine cable protective sleeves was achieved.

CN224438383UActive Publication Date: 2026-06-30SHANGHAI SHENNAN SALVAGE & DREDGING CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI SHENNAN SALVAGE & DREDGING CO LTD
Filing Date
2025-07-14
Publication Date
2026-06-30

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Abstract

This utility model discloses an auxiliary laying device for submarine cable protective sleeves, comprising: a submarine cable conveying platform; and a sleeve lifting platform installed on one side of the cable entry end of the submarine cable conveying platform. A first half of the submarine cable protective sleeve is adapted to be placed on the top of the sleeve lifting platform. The sleeve lifting platform has a raised state and a lowered state. In the raised state, the top of the sleeve lifting platform is flush with the top of the submarine cable conveying platform, and the first half of the submarine cable protective sleeve is adapted to be fitted onto the bottom of the submarine cable to be laid. In the lowered state, the top height of the sleeve lifting platform is lower than the top height of the submarine cable conveying platform, which is suitable for placing the next first half of the submarine cable protective sleeve on the top of the sleeve lifting platform. After the first half of the submarine cable protective sleeve is placed on the top of the sleeve lifting platform, controlling the sleeve lifting platform to rise from the lowered state to the raised state can raise the first half of the submarine cable protective sleeve to the bottom of the submarine cable to be laid, thereby reducing the workload of workers and improving assembly efficiency.
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Description

Technical Field

[0001] This utility model relates to the field of submarine cable transmission, and further to a submarine cable protective sleeve auxiliary laying device. Background Technology

[0002] Submarine cables are cables wrapped in insulating material and laid on the seabed for telecommunications transmission. Submarine cables are divided into submarine communication cables and submarine power cables. Modern submarine cables use optical fibers as the material to transmit telephone and internet signals.

[0003] During submarine cable laying, a protective sleeve is typically fitted over the cable to protect it and improve its stability on the seabed. Existing cable sleeves are usually two-part structures. Before the cable is laid, the two halves of the sleeve are installed on both sides of the cable and secured together. Currently, the installation of cable sleeves is usually done manually by workers, who need to carry the sleeves back and forth, which is not only physically demanding but also inefficient. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide an auxiliary laying device for submarine cable protective sleeves. After placing the first half of the submarine cable protective sleeve on the top of the sleeve lifting platform, the device controls the sleeve lifting platform to rise from a lowering state to a raised state, thereby raising the first half of the submarine cable protective sleeve to the bottom of the submarine cable to be laid, thus reducing the workload of workers and improving assembly efficiency.

[0005] To achieve the above objectives, the present invention aims to provide an auxiliary laying device for submarine cable protective sleeves, comprising:

[0006] Submarine cable transport platform, the submarine cable to be laid is suitable to be installed on the top of the submarine cable transport platform, the submarine cable transport platform can drive the submarine cable to be laid to move;

[0007] A sleeve lifting platform is installed on one side of the cable entry end of the submarine cable conveying platform, and a first half-submarine cable protective sleeve is adapted to be placed on the top of the sleeve lifting platform.

[0008] The sleeve lifting platform has a raised state and a lowered state. In the raised state, the top of the sleeve lifting platform is flush with the top of the submarine cable conveying platform, and the first half-submarine cable protective sleeve is adapted to be fitted onto the bottom of the submarine cable to be laid. In the lowered state, the top height of the sleeve lifting platform is lower than the top height of the submarine cable conveying platform, which is suitable for placing the next first half-submarine cable protective sleeve on the top of the sleeve lifting platform.

[0009] In some embodiments, the casing lifting platform includes a lifting drive mechanism and a lifting platform, wherein the lifting platform is disposed on one side of the lifting drive mechanism;

[0010] The lifting drive mechanism includes a drive component and a vertically arranged lifting sprocket assembly. The drive component is connected to the lifting sprocket assembly and is adapted to drive the lifting sprocket assembly to rotate.

[0011] The lifting drive mechanism also includes a connecting plate, one end of which is connected to the lifting sprocket assembly and the other end of which is connected to the lifting platform. When the drive component drives the lifting sprocket assembly to rotate, it can drive the lifting platform to switch between the raised state and the lowered state.

[0012] In some embodiments, the casing lifting platform further includes a first support roller, a second support roller, and a rotating sleeve. The first support roller and the second support roller are rotatably mounted on the lifting platform at a predetermined distance from each other, and the axis directions of the first support roller and the second support roller are perpendicular to the axis direction of the submarine cable to be laid. The rotating sleeve is rotatably sleeved on the outside of the first support roller and the second support roller.

[0013] In some embodiments, along the axial direction of the first support roller and the second support roller, both the first support roller and the second support roller have a structure that is high at both ends and low in the middle.

[0014] In some embodiments, the submarine cable protective sleeve auxiliary laying device further includes a first transport platform, which is disposed on one side of the sleeve lifting platform. When the sleeve lifting platform is in the lowering state, the top of the lifting platform is flush with the top of the first transport platform. The first transport platform is adapted to move the first half of the submarine cable protective sleeve to the top of the lifting platform.

[0015] In some embodiments, the length extension direction of the first transport platform is perpendicular to the length extension direction of the submarine cable transport platform.

[0016] In some embodiments, the submarine cable protective sleeve auxiliary laying device further includes a second transport platform disposed on one side of the submarine cable transport platform, the second transport platform being adapted to transport the second half of the submarine cable protective sleeve to the top of the submarine cable transport platform.

[0017] In some embodiments, the length extension direction of the second transport platform is perpendicular to the length extension direction of the submarine cable transport platform.

[0018] In some embodiments, the second transport platform has a first height at the end closer to the submarine cable transport platform and a second height at the end farther from the submarine cable transport platform, and the second transport platform is tilted, with the first height being greater than the second height.

[0019] In some embodiments, the first transport platform has a third height at the end closer to the casing lifting platform and a fourth height at the end farther from the casing lifting platform, the first transport platform is tilted, and the third height is greater than the fourth height. Attached Figure Description

[0020] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the submarine cable protection sleeve auxiliary laying device according to a preferred embodiment of the present invention.

[0022] Figure 2 This is a three-dimensional structural schematic diagram of the submarine cable protection sleeve auxiliary laying device, which is a preferred embodiment of this utility model.

[0023] Figure 3 This is a top view of the preferred embodiment of the submarine cable protection sleeve auxiliary laying device of this utility model.

[0024] Figure 4 This is a three-dimensional structural diagram of the casing lifting platform of the submarine cable protection casing auxiliary laying device in the lowering state, which is a preferred embodiment of this utility model.

[0025] Figure 5 This is an exploded structural diagram of the casing lifting platform of the submarine cable protection casing auxiliary laying device according to a preferred embodiment of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the submarine cable protection sleeve auxiliary laying device in another state according to a preferred embodiment of this utility model.

[0027] Figure 7 This is a three-dimensional structural diagram of the sleeve lifting platform of the submarine cable protection sleeve auxiliary laying device in the raised state, which is a preferred embodiment of this utility model. Detailed Implementation

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0029] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0030] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] refer to Figures 1 to 7 This application provides a submarine cable protective sleeve auxiliary laying device 100, which includes a submarine cable conveying platform 10 and a sleeve lifting platform 20. The submarine cable 200 to be laid is adapted to be installed on the top of the submarine cable conveying platform 10, and the submarine cable conveying platform 10 is capable of moving the submarine cable 200. The sleeve lifting platform 20 is installed on one side of the submarine cable conveying platform 10. Specifically, one end of the submarine cable conveying platform 10 is an inlet end 11, and the other end is an outlet end 12. The submarine cable 200 to be laid is adapted to enter from the inlet end 11 and exit from the outlet end 12. The sleeve lifting platform 20 is disposed on the side of the inlet end 11 of the submarine cable conveying platform 10, or in other words, the sleeve lifting platform 20 is disposed close to the inlet end 11 of the submarine cable conveying platform 10.

[0034] The first half-submarine cable protective sleeve 300 is adapted to be placed on top of the sleeve lifting platform 20. The sleeve lifting platform 20 has a raised state 21 and a lowered state 22. (Reference) Figure 6 and Figure 7 In the raised state 21, the top of the sleeve lifting platform 20 is flush with the top of the submarine cable conveying platform 10, and the first half-submarine cable protective sleeve 300 is adapted to be fitted onto the bottom of the submarine cable 200 to be laid; Reference Figure 1 and Figure 4 In the landing state 22, the top height of the sleeve lifting platform 20 is lower than the top height of the submarine cable conveying platform 10, which is suitable for placing the next first half submarine cable protective sleeve on the top of the sleeve lifting platform.

[0035] When using the submarine cable protective sleeve auxiliary laying device 100 provided in this application, when the sleeve lifting platform 20 is in the lowering state 22, the height of the sleeve lifting platform 20 is relatively low, making it easier for operators to place the first half of the submarine cable protective sleeve 300 on top of the sleeve lifting platform 20. After placing the first half of the submarine cable protective sleeve 300 on top of the sleeve lifting platform 20, the sleeve lifting platform 20 is controlled to rise from the lowering state 22 to the raised state 21, thereby raising the height of the first half of the submarine cable protective sleeve 300 to the bottom of the submarine cable 200 to be laid, thereby reducing the workload of workers and improving assembly efficiency.

[0036] The first half-submarine cable protective sleeve 300 is adapted to be spliced ​​with the second half-submarine cable protective sleeve 400 to form a protective sleeve structure that is fitted onto the outside of the submarine cable 200 to be laid. Both the first half-submarine cable protective sleeve 300 and the second half-submarine cable protective sleeve 400 are semi-circular sheet structures. After the first half-submarine cable protective sleeve 300 is installed at the bottom of the submarine cable 200 to be laid, the second half-submarine cable protective sleeve 400 is fitted onto the top of the submarine cable 200 to be laid, corresponding to the position of the first half-submarine cable protective sleeve 300, and the first half-submarine cable protective sleeve 300 and the second half-submarine cable protective sleeve 400 are fixed together with bolts, thereby completing the installation of the submarine cable protective sleeve.

[0037] refer to Figure 1 , Figure 2 as well as Figure 4Specifically, the casing lifting platform 20 includes a lifting drive mechanism 23 and a lifting platform 24, with the lifting platform 24 disposed on one side of the lifting drive mechanism 23. The lifting drive mechanism 23 is connected to the lifting platform 24, and the lifting drive mechanism 23 can drive the lifting platform 24 to rise and fall, so that the casing lifting platform 20 can switch between the raised state 21 and the lowered state 22.

[0038] Specifically, the lifting drive mechanism 23 includes a drive component (not shown in the figure) and a vertically arranged lifting sprocket assembly 232. The drive component is connected to the lifting sprocket assembly 232 and is adapted to drive the lifting sprocket assembly 232 to rotate. The lifting drive mechanism 23 also includes a connecting plate 233. One end of the connecting plate 233 is connected to the lifting sprocket assembly 232, and the other end is connected to the lifting platform 24. When the drive component drives the lifting sprocket assembly 232 to rotate, it can drive the lifting platform 24 to switch between the raised state 21 and the lowered state 22.

[0039] The lifting sprocket assembly 232 further includes two tensioning wheels (not shown in the figure) spaced apart and a transmission chain 2321. The transmission chain 2321 is sleeved on the two tensioning wheels. One end of the connecting plate 233 is fixedly connected to the transmission chain 2321. The driving member is connected to one of the tensioning wheels. When the driving member drives the tensioning wheel to rotate, it can drive the transmission chain 2321 to rotate, thereby driving the lifting and lowering of the connecting plate 233.

[0040] Preferably, the driving component is a motor. In some modified embodiments, the lifting drive mechanism 23 is a lifting cylinder disposed at the bottom of the lifting platform 24, which drives the lifting platform 24 to rise and fall by controlling the lifting of the lifting cylinder.

[0041] refer to Figure 5 Furthermore, the sleeve lifting platform 20 further includes a first support roller 251, a second support roller 252, and a rotating sleeve 253. The first support roller 251 and the second support roller 252 are rotatably mounted on the top of the lifting platform 24 at a predetermined distance from each other, and the axis directions of the first support roller 251 and the second support roller 252 are perpendicular to the axis direction of the submarine cable 200 to be laid. The rotating sleeve 253 is rotatably sleeved on the outside of the first support roller 251 and the second support roller 252.

[0042] When the sleeve lifting platform 20 is in the raised state 21, the top of the transmission sleeve 253 is approximately flush with the top of the submarine cable conveying platform 10, the bottom of the first half-submarine cable protective sleeve 300 abuts against the rotating sleeve 253, and the inner wall of the sleeve abuts against the submarine cable 200 to be laid. When the submarine cable conveying platform 10 rotates and drives the submarine cable 200 to be laid from the cable entry end 11 to the cable exit end 12, the submarine cable 200 to be laid can pull the first half-submarine cable protective sleeve 300, which is located on the sleeve lifting platform 20 and in contact with the submarine cable 200, to move together, and drive the first half-submarine cable protective sleeve 300 from the sleeve lifting platform 20 to the submarine cable conveying platform 10. By setting the first support roller 251 and the second support roller 252 on the top of the lifting platform 24, the resistance of the first half-submarine cable protective sleeve 300 moving from the lifting platform 24 to the submarine cable conveying platform 10 can be reduced, thus facilitating the movement of the first half-submarine cable protective sleeve 300.

[0043] In some modified embodiments, along the axial direction of the first support roller 251 and the second support roller 252, both the first support roller 251 and the second support roller 252 have a structure that is higher at both ends and lower in the middle. The outer surface of the first half-submarine cable protective sleeve 300 is arc-shaped. Setting the first support roller 251 and the second support roller 252 to have a structure that is higher at both ends and lower in the middle can increase the contact area with the first half-submarine cable protective sleeve 300 and improve the stability of the first half-submarine cable protective sleeve 300 when placed on the sleeve lifting platform 20.

[0044] refer to Figure 1 , Figure 2 as well as Figure 3 The submarine cable protective sleeve auxiliary laying device 100 further includes a first transport platform 30, which is disposed on one side of the sleeve lifting platform 20. When the sleeve lifting platform 20 is in the lowering state 22, the top of the lifting platform 24 is flush with the top of the first transport platform 30. The first transport platform 30 is adapted to move the first half of the submarine cable protective sleeve 300 to the top of the lifting platform 24.

[0045] During operation, when the sleeve lifting platform 20 is in the lowering state 22, the top of the lifting platform 24 is level with or lower than the top of the first transport platform 30. The first transport platform 30 is then rotated to transfer the first half-submarine cable protective sleeve 300 from the first transport platform 30 to the top of the lifting platform 24. The sleeve lifting platform 20 is then switched from the lowering state 22 to the raising state 21 to lift the first half-submarine cable protective sleeve 300. The cable is raised to the bottom of the submarine cable 200 to be laid; the cable conveying platform 10 is controlled to move the cable 200 to be laid from the cable entry end 11 to the cable exit end 12, so as to pull the first half of the submarine cable protective sleeve 300 from the lifting platform 24 to the cable conveying platform 10; the sleeve lifting platform 20 is controlled to switch from the raised state 21 to the lowered state 22, and the first transport platform 30 is controlled to rotate again to transfer the next first half of the submarine cable protective sleeve 300 to the sleeve lifting platform 20.

[0046] Specifically, the first transport platform 30 has a lifting channel 31 at one end near the sleeve lifting platform 20. The lifting channel 31 connects the upper and lower sides of the first transport platform 30. The position of the lifting platform 24 corresponds to the position of the lifting channel 31. When the first transport platform 30 rotates, it can drive the first half-submarine cable protective sleeve 300 to move to the lifting channel 31, that is, above the lifting platform 24. When the lifting platform 24 rises, it can drive the first half-submarine cable protective sleeve 300 to rise.

[0047] Furthermore, the first transport platform 30 further includes a first supporting sidewall 32 and a second supporting sidewall 33, which are respectively arranged at a predetermined distance from each other. The first transport platform 30 further includes a first rolling sprocket assembly 321 installed on the side of the first supporting sidewall 32 facing the second supporting sidewall 33, and a second rolling sprocket assembly 331 installed on the side of the second supporting sidewall 33 facing the first supporting sidewall 32, with the first rolling sprocket assembly 321 and the second rolling sprocket assembly 321 arranged opposite to each other. One end of the first semi-submarine cable protective sleeve 300 is adapted to be placed on the first rolling sprocket assembly 321, and the other end of the first semi-submarine cable protective sleeve 300 is adapted to be placed on the second rolling sprocket assembly 331. When the first rolling sprocket assembly 321 and the second rolling sprocket assembly 331 rotate, they can drive the first semi-submarine cable protective sleeve 300 to move relative to the first supporting sidewall 32 and the second supporting sidewall 33. The structures of the first rolling sprocket group 321 and the second rolling sprocket group 331 are similar to those of the lifting sprocket group 232, and will not be described in detail here.

[0048] Preferably, the length extension direction of the first transport platform 30 is perpendicular to the length extension direction of the submarine cable transport platform 10.

[0049] refer to Figure 1 , Figure 2 as well as Figure 3 The submarine cable protective sleeve auxiliary laying device 100 further includes a second transport platform 40, which is disposed on one side of the submarine cable transport platform 10 and is adapted to transport the second half of the submarine cable protective sleeve 400 to the top of the submarine cable transport platform 10.

[0050] Preferably, the length extension direction of the second transport platform 40 is perpendicular to the length extension direction of the submarine cable transport platform 10. Preferably, the plane containing the length extension direction of the second transport platform 40 is parallel to the plane containing the length extension direction of the first transport platform 30.

[0051] The second transport platform 40 has a first height at one end near the submarine cable transport platform 10 and a second height at the end away from the submarine cable transport platform 10. The second transport platform 40 is tilted, and the first height is greater than the second height. The tilted design of the second transport platform 40 allows it to raise the height of the second half-submarine cable protective sleeve 400 while transporting it. When the second half-submarine cable protective sleeve 400 moves to the end of the second transport platform 40 near the submarine cable transport platform 10, its height is slightly higher than the height of the submarine cable 200 to be laid on the submarine cable transport platform 10. The operator can then remove the second half-submarine cable protective sleeve 400 from the second transport platform 40 and place it above the submarine cable 200 to be laid on the submarine cable transport platform 10, and fix it to the corresponding first half-submarine cable protective sleeve 300.

[0052] The structure of the second transport platform 40 is similar to that of the first transport platform 30, and will not be described in detail here. The structure of the submarine cable transport platform 10 is also similar to that of the first transport platform 30, and will not be described in detail here.

[0053] In a modified embodiment, the first transport platform 30 is also inclined. The end of the first transport platform 30 near the sleeve lifting platform 20 has a third height, and the end away from the sleeve lifting platform 20 has a fourth height, where the third height is greater than the fourth height. The function of tilting the first transport platform 30 is similar to that of tilting the second transport platform 40, enabling the lifting of the first half-submarine cable protective sleeve 300 while simultaneously transporting it.

[0054] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. An apparatus for assisted laying of a submarine cable protection sleeve, characterized in that, include: A submarine cable transport platform is provided, and the submarine cable to be laid is suitable for installation on the top of the submarine cable transport platform. The submarine cable transport platform is capable of moving the submarine cable to be laid. A sleeve lifting platform is installed on one side of the cable entry end of the submarine cable conveying platform, and a first half-submarine cable protective sleeve is adapted to be placed on the top of the sleeve lifting platform. The sleeve lifting platform has a raised state and a lowered state. In the raised state, the top of the sleeve lifting platform is flush with the top of the submarine cable conveying platform, and the first half-submarine cable protective sleeve is adapted to be fitted onto the bottom of the submarine cable to be laid. In the lowered state, the top height of the sleeve lifting platform is lower than the top height of the submarine cable conveying platform, which is suitable for placing the next first half-submarine cable protective sleeve on the top of the sleeve lifting platform.

2. An apparatus according to claim 1, characterised in that, The casing lifting platform includes a lifting drive mechanism and a lifting platform, with the lifting platform located on one side of the lifting drive mechanism; The lifting drive mechanism includes a drive component and a vertically arranged lifting sprocket assembly. The drive component is connected to the lifting sprocket assembly and is adapted to drive the lifting sprocket assembly to rotate. The lifting drive mechanism also includes a connecting plate, one end of which is connected to the lifting sprocket assembly and the other end of which is connected to the lifting platform. When the drive component drives the lifting sprocket assembly to rotate, it can drive the lifting platform to switch between the raised state and the lowered state.

3. An apparatus according to claim 2, wherein, The casing lifting platform further includes a first support roller, a second support roller, and a rotating sleeve. The first support roller and the second support roller are rotatably mounted on the lifting platform at a preset distance from each other, and the axis directions of the first support roller and the second support roller are perpendicular to the axis direction of the submarine cable to be laid. The rotating sleeve is rotatably sleeved on the outside of the first support roller and the second support roller.

4. An apparatus according to claim 3, wherein, Along the axial direction of the first support roller and the second support roller, both the first support roller and the second support roller have a structure that is high at both ends and low in the middle.

5. An auxiliary installation for laying a sea cable protection sleeve according to any one of claims 2 to 4, characterized in that, The submarine cable protective sleeve auxiliary laying device further includes a first transport platform, which is disposed on one side of the sleeve lifting platform. When the sleeve lifting platform is in the lowering state, the top of the lifting platform is flush with the top of the first transport platform. The first transport platform is adapted to move the first half of the submarine cable protective sleeve to the top of the lifting platform.

6. An apparatus according to claim 5, wherein, The length extension direction of the first transport platform is perpendicular to the length extension direction of the submarine cable transport platform.

7. An apparatus according to claim 5, wherein, The submarine cable protective sleeve auxiliary laying device further includes a second transport platform, which is disposed on one side of the submarine cable transport platform and is adapted to transport the second half of the submarine cable protective sleeve to the top of the submarine cable transport platform.

8. An auxiliary laying apparatus for a sea cable protection sleeve as claimed in claim 7, characterised in that, The length extension direction of the second transport platform is perpendicular to the length extension direction of the submarine cable transport platform.

9. An auxiliary laying apparatus for a sea cable protection sleeve as claimed in claim 8, characterised in that, The second conveying platform has a first height near one end of the submarine cable conveying platform and a second height away from the one end of the submarine cable conveying platform, and the second conveying platform is arranged in an inclined manner, and the first height is greater than the second height.

10. An auxiliary installation for laying a submarine cable protecting jacket according to claim 9, characterized in that, The first conveying platform has a third height near one end of the casing lifting platform and a fourth height away from the one end of the casing lifting platform, and the first conveying platform is arranged in an inclined manner, and the third height is greater than the fourth height.