Traction device for penetrating installation of flexible protective sleeve of offshore wind power submarine cable

Abstract

The utility model discloses a traction device for penetrating installation of a flexible protective sleeve of an offshore wind power submarine cable, two ends of the traction device are respectively connected with the submarine cable and a crane in a matching manner, and the traction device comprises a traction head and a connecting flange which are connected through a weak connecting assembly in a matching manner. The weak connecting assembly comprises a connecting block arranged on the traction head and a weak connecting bolt movably arranged on the connecting block, the weak connecting bolt comprises a nut part, a thread part and a connecting part for connecting the nut part and the thread part, and the diameter of the connecting part is smaller than that of the nut part and that of the thread part; the threaded part penetrates through the connecting block and then is in threaded fit with the connecting flange till the connecting flange is attached to the end face of the traction head, one part of the connecting part is arranged in the traction head, and the other part of the connecting part is arranged in the connecting flange. According to the traction device, the submarine cable protection sleeve is installed through traction equipment on a fan foundation, underwater operation can be effectively reduced, the offshore installation time is shortened, and the offshore construction cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of offshore wind power submarine cable protection, and specifically relates to a traction device for penetrating installation of a flexible protective casing of an offshore wind power submarine cable. Background Art

[0002] An offshore wind farm is generally composed of offshore wind turbines, offshore substations, submarine cables and other parts. The electricity generated by the wind turbines needs to be transmitted to the offshore substations through submarine cables, and the voltage is increased and then sent to the onshore control center to be incorporated into the local power grid. At present, the development of offshore wind power and the construction of offshore wind farms are gradually developing in the direction of deep sea. The deep sea water and the long distance from the shore make the environment more severe. As the intensity of deep sea wind, waves and currents increases, the submarine cables laid in the offshore wind farms are also subject to stronger fluid effects. The seawater and seabed soil in the offshore wind farm also have complex biological and chemical compositions. Various marine organisms and salt have created a highly corrosive offshore wind farm environment. In addition, there are a large number of ships in the entire life cycle of the offshore wind farm, from construction ships in the construction period to operation and maintenance ships in the operation period, as well as other ships entering the wind farm. Their anchoring and anchoring constitute a dangerous mechanical environment for the submarine cables on the seabed, which is easy to cause anchors to stab and drag the submarine cables. Where possible and necessary, the preferred approach is to bury the cable below the seabed, which will help protect the cable from potential damage from anchors or commercial fishing. In some cases, it may not be possible to bury the cable below the seabed, and other protection methods may be considered, such as covering the cable with riprap or covering the cable with modular protection units made of concrete.

[0003] However, due to the scouring around the foundation of the fixed wind power platform and the lack of suitable technical solutions, it is currently impossible to safely guide the submarine cable from the platform foundation structure to the bottom of the seabed, causing the submarine cable to exist in a suspended form under the fixed wind power platform, leaving a safety hazard. It is worth noting that this problem exists under many wind turbines in offshore wind farms. Therefore, it is very necessary to carry out research on the protection design and analysis of the suspended submarine cables under the fixed wind power platform, which is of great significance to the healthy development of my country's offshore wind power.

[0004] At present, most submarine cables in offshore wind farms use center-clamp Haff tubes or traditional J-tube solutions, which mainly achieve the effect of protecting the submarine cables by uniform sleeves or homogeneous material coating. However, these solutions require large amounts of work and complicated installation processes. In addition, the diameter of the Haff tube is large, which aggravates seabed scour. In addition, the existing submarine cable installation and traction devices are complex, often requiring a large amount of underwater operations, and have low construction efficiency. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art, the utility model aims to provide a traction device for the penetration installation of a flexible protective casing for offshore wind power cables, so as to effectively protect the submarine cables of offshore wind farms, and connect the submarine cable protection device to the wind power foundation, with small underwater operation volume and high construction efficiency, shortening the offshore installation time and reducing construction costs.

[0006] The traction device for the installation of the flexible protective sleeve of an offshore wind power cable is described. Both ends are respectively connected with the submarine cable and the crane, including a traction head and a connecting flange. The traction head and the connecting flange are connected through a weak connection component. The weak connection component includes a connection block arranged on the traction head and a weak connection bolt movably arranged on the connection block. The weak connection bolt includes a nut part, a threaded part and a connecting part connecting the nut part and the threaded part. The diameter of the connecting part is smaller than the diameter of the nut part and the threaded part. After passing through the connection block, the threaded part is threadedly matched with the connecting flange until the connecting flange fits with the end face of the traction head. A part of the connecting part is placed in the traction head, and the other part is placed in the connecting flange. The crane pulls the traction device and the submarine cable to lift upward along the flexible protective sleeve. When the traction force of the crane and the gravity of the submarine cable are unequal to a preset value, the connecting part breaks so that the nut part and the threaded part are separated, thereby realizing the separation of the traction head and the connecting flange. The traction head is continuously lifted and recycled by the crane. The connecting flange and the submarine cable slide down under the action of gravity until they are clamped with the flexible protective sleeve.

[0007] Furthermore, an end plate is arranged at one end of the connecting flange, and a threaded hole is arranged on the end plate to threadably cooperate with the threaded portion.

[0008] Furthermore, a buckle is provided on a side of the end plate away from the traction head to cooperate with the connection of the submarine cable.

[0009] Furthermore, a groove is provided on the side wall of the traction head near one end of the connecting flange, and the connecting block is arranged in the groove; a through hole and an inner recessed groove connected to the through hole are provided on the connecting block, and the weak connection bolt passes through the through hole and is screwed with the threaded hole on the end plate, and the nut part is placed in the inner recessed groove.

[0010] Furthermore, the traction head comprises an integrally arranged guide cone and a guide column, and a universal joint is arranged at the end of the guide cone away from the guide column to cooperate with the crane; and the connecting block is arranged on the guide column.

[0011] Furthermore, the guide column has the same outer diameter as the connecting flange.

[0012] Furthermore, the universal joint includes a U-shaped groove and an axle pin arranged at the end of the guide cone, the axle pin is vertically arranged and penetrates the two side walls of the U-shaped groove, and the traction rope of the crane is arranged on the axle pin.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] (1) The traction device of the present application completes the installation of the submarine cable protection sleeve by traction equipment on the wind turbine foundation, which can effectively reduce underwater operations, shorten offshore installation time, and reduce offshore construction costs.

[0015] (2) Through the universal joint at the front end of the traction head, the front part of the traction head can rotate in a universal direction during the installation process, thereby reducing the impact of the disturbance at the crane end on the movement of the rear submarine cable protective sleeve during the installation process, reducing the rotation of the protective sleeve and the submarine cable, and reducing friction damage during the installation process.

[0016] (3) The weak link bolt is located in the middle of the traction device. The size of the weak part of the connection embedded in the traction head and the connection flange (i.e., the thickness of the connection part) accurately controls the timing of the rear half of the submarine cable protective cover being separated from the traction head and the installation being completed. The traction equipment end can automatically and accurately complete the separation near the preset position, avoiding the interference of other factors in manual operation, while saving labor costs, easy operation, and quick separation, saving construction time. At the same time, the weak link component, as the only constraint between the traction head and the connection flange, can avoid the mutual influence of various constraints during explosive fracture caused by too many interface constraints, thereby improving the sensitivity of the fracture process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the use of the traction device of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the traction device of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the weak link component of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the weak connection bolt of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the traction head of the utility model.

[0022] In the figure: 1-traction head, 11-guide cone, 12-guide column, 13-universal joint, 131-U-shaped groove, 132-axle pin, 2-connecting flange, 3-weak connection component, 31-connecting block, 32-weak connection bolt, 321-nut part, 322-connecting part, 323-threaded part, 4-end plate, 5-retaining ring, 6-submarine cable, 7-submarine cable protective cover. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the present invention is further described below in conjunction with the accompanying drawings.

[0024] like Figure 1-Figure 4 As shown, a traction device for the through-installation of a flexible protective sleeve of an offshore wind power cable is the front end part of a flexible J-tube submarine cable protection device, and its two ends are respectively connected with the submarine cable 6 and the crane, and include a traction head 1 and a connection flange 2. One end of the connection flange 2 is connected with the traction head 1 through a weak connection component 3, and the other end is connected with a flange of the submarine cable protection sleeve 7. The weak connection component 3 includes a connection block 31 arranged on the traction head 1 and a weak connection bolt 32 movably arranged on the connection block 31. The weak connection bolt 32 includes a nut portion 321, a threaded portion 323, and a connection portion 322 connecting the nut portion 321 and the threaded portion 323. The diameter of the connection portion 322 is smaller than the diameter of the nut portion 321 and the threaded portion 323 (that is, the connection portion 322 is the weak part of the weak connection bolt 32). After the threaded portion 323 passes through the connection block 31, it is threadedly matched with the connection flange 2 until the connection flange 2 is fitted with the end face of the traction head 1. A part of the connection portion 322 is placed in the traction head 1, and the other part is placed in the connection flange 2.

[0025] It can be understood that the crane pulls the traction device, the submarine cable 6 and the submarine cable protective cover 7 upward along the inside of the wind turbine foundation. When the traction force of the crane is not equal to the gravity of the submarine cable 6 and the submarine cable protective cover 7 (that is, the traction force reaches a certain preset value), causing the weak connection component 3 to reach a preset bursting stress value, the connecting portion 322 (the weak part of the middle section) breaks, so that the nut portion 321 and the threaded portion 323 are separated, thereby realizing the separation of the traction head 1 and the connecting flange 2. The traction head 1 is further lifted and recycled by the crane, and the connecting flange 2 and the submarine cable 6 slide down under the action of gravity until the barbs on the submarine cable protective cover 7 are engaged with the penetration hole of the wind turbine foundation. At this time, the submarine cable protective cover 7 connected with the submarine cable 6 is successfully installed on the wind turbine foundation.

[0026] In this embodiment, an end plate 4 is provided at one end of the connecting flange 2, and a threaded hole is provided on the end plate 4 to be threadedly matched with the threaded portion 323; a buckle 5 is provided on the side of the end plate 4 away from the traction head 1, and the submarine cable 6 is connected to the buckle 5 with the steel wire rope (that is, used to connect the traction device with the rear submarine cable protection device). At this time, the submarine cable 6 has been connected and fixed with the submarine cable protection cover 7 through a special metal mesh sleeve, and the front and rear connection of the traction device and the rear submarine cable protection cover can be completed by passing the steel wire rope at the other end of the metal mesh sleeve through the buckle 5 and fixing it.

[0027] In addition, a groove is provided on the side wall of the traction head 1 near the end of the connecting flange 2, and the connecting block 31 is provided in the groove; a through hole and an inner sinking groove connected to the through hole are provided on the connecting block 31, and the weak connection bolt 32 passes through the through hole and is screwed with the threaded hole on the end plate 4, and the nut portion 321 is placed in the inner sinking groove. The traction head 1 includes an integrally arranged guide cone 11 and a guide column 12, and a universal joint 13 is provided at the end of the guide cone 11 away from the guide column 12 to cooperate with the crane; the connecting block 31 is provided on the guide column 12. The outer diameter of the guide column 12 is consistent with that of the connecting flange 2.

[0028] like Figure 5 As shown, the universal joint 13 includes a U-shaped groove 131 and an axle pin 132 arranged at the end of the guide cone 11. The axle pin 132 is arranged vertically and penetrates the two side walls of the U-shaped groove 131. The traction rope of the crane is arranged on the axle pin 132, so that the submarine cable 6 and the submarine cable protective cover 7 are inserted into the wind turbine foundation under the traction of the crane. Through the cooperation of the U-shaped groove 131 and the axle pin 132, the traction rope can rotate in a plane perpendicular to the submarine cable protective cover 7 and in a plane perpendicular to the axis of the axle pin 132, so that the disturbance of the crane end during the traction process will not have too much impact on the rear submarine cable protective cover 7, reduce the rotation of the submarine cable protective cover 7 and the submarine cable 6, and reduce the friction damage during the installation process.

[0029] In the present application, only one set of weak connection components 3 is arranged between the traction head 1 and the connection flange 2, and the connection part 322 is the weak part of the weak connection bolt 32. Because the space of the entire traction device, the submarine cable 6 and the submarine cable protective cover 7 in the wind turbine foundation is limited, and the angle can be adjusted by posture control during the installation process, it can ensure that the connection flange 2 at the connection of the weak connection component 3 is tightly fitted with the end face of the traction head 1, and there will be no unconnected end opening of the traction head 1 and the connection flange 2 due to only one set of weak connection components 3 for front and back connection, so as to ensure that the weak connection bolt 32 will only break due to the traction force in the axial direction, and will not break outside the axial direction. In addition, a set of weak connection components as the only constraint between the traction head and the connection flange can avoid the mutual influence between the constraints during the explosive fracture caused by too many interface constraints, and improve the sensitivity of the fracture process.

[0030] During installation, the crane on the platform drops a steel wire rope from the top of the wind turbine foundation, which is pulled by underwater workers to pass through the cable threading hole of the wind turbine foundation and is connected and fixed to the axle pin 132 at the front end of the traction head 1, so that the submarine cable protective cover 7 connected to the submarine cable 6 is inserted into the wind turbine foundation under the traction of the crane; under the action of traction, the overall height of the submarine cable 6 and the submarine cable protective cover 7 increases, and the external forces such as gravity of the suspended section of the submarine cable 6 and the submarine cable protective cover 7 gradually increase. When the preset bursting stress value of the weak connection component 3 is reached, the weak connection bolt 32 therein will break, and the part of the traction head 1 before the weak connection component 3 will continue to be launched upward under the action of traction, and the subsequent part (i.e., the connecting flange 2, the submarine cable 6 and the submarine cable protective cover 7) will slide down under the action of gravity until the submarine cable protective cover 7 is clamped at the penetration hole of the wind turbine foundation, and the installation and laying of the submarine cable is completed.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A traction device for the installation of a flexible protective casing of an offshore wind power cable, wherein the two ends are respectively connected to the submarine cable (6) and the crane, and comprises a traction head (1) and a connecting flange (2), wherein the traction head (1) and the connecting flange (2) are connected via a weak connection component (3), and wherein: The weak connection assembly (3) comprises a connection block (31) arranged on the traction head (1) and a weak connection bolt (32) movably arranged on the connection block (31); the weak connection bolt (32) comprises a nut portion (321), a threaded portion (323), and a connection portion (322) connecting the nut portion (321) and the threaded portion (323); the diameter of the connection portion (322) is smaller than the diameters of the nut portion (321) and the threaded portion (323); the threaded portion (323) passes through the connection block (31) and is threadably engaged with the connection flange (2) until the connection flange (2) and the end surface of the traction head (1) are in contact; a portion of the connection portion (322) is disposed in the traction head (1), and another portion is disposed in the connection flange (2).

2. A traction device for penetration installation of a flexible protective casing of an offshore wind power cable according to claim 1, characterized in that: An end plate (4) is provided at one end of the connecting flange (2), and a threaded hole is provided on the end plate (4) and is threadably matched with the threaded portion (323).

3. A traction device for penetration installation of a flexible protective casing of an offshore wind power cable according to claim 2, characterized in that: A buckle (5) is provided on the side of the end plate (4) away from the traction head (1) for connection with a submarine cable (6).

4. A traction device for penetration installation of a flexible protective casing of an offshore wind power cable according to claim 2, characterized in that: A groove is provided on the side wall of the traction head (1) at one end close to the connecting flange (2), and the connecting block (31) is arranged in the groove; a through hole and an inner recessed groove connected to the through hole are provided on the connecting block (31); the weak connection bolt (32) passes through the through hole and is screwed to the threaded hole on the end plate (4), and the nut portion (321) is placed in the inner recessed groove.

5. A traction device for penetration installation of a flexible protective casing of an offshore wind power cable according to any one of claims 1 to 4, characterized in that: The traction head (1) comprises an integrally arranged guide cone (11) and a guide column (12); a universal joint (13) is arranged at the end of the guide cone (11) away from the guide column (12) to cooperate with a crane; and the connection block (31) is arranged on the guide column (12).

6. A traction device for penetration installation of a flexible protective casing of an offshore wind power cable according to claim 5, characterized in that: The guide column (12) has the same outer diameter as the connecting flange (2).

7. A traction device for penetration installation of a flexible protective casing of an offshore wind power cable according to claim 5, characterized in that: The universal joint (13) comprises a U-shaped groove (131) and an axle pin (132) arranged at the end of the guide cone (11); the axle pin (132) is arranged vertically and penetrates through two side walls of the U-shaped groove (131); and the traction rope of the crane is arranged on the axle pin (132).

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