A Fixed Device for a Submarine Cable Protection Area Obstruction Ship Anchor and Its Construction Method

Abstract

A fixed device for a submarine cable protection area blocking ship anchor, comprising a steel pipe anchor, a branch anchor chain, a main anchor chain, a Kent shackle and a shackle. The steel pipe anchor includes a steel pipe, an upper hanging ring located at the upper end of the outer wall of the steel pipe, an anchor chain connecting ring located at the middle end of the outer wall of the steel pipe, and a lower hanging ring located at the lower end of the outer wall of the steel pipe. The steel pipe anchors at both ends are connected by the main anchor chain. In the present invention, a barrier is formed by connecting the steel pipe anchors, the main anchor chain or the steel pipe anchors, the main anchor chain and the branch anchor chain. The barrier resists the anchor grab force of the ship anchor by its own uplift force or gravity, so that the ship anchor stops moving before hooking the submarine cable, thereby realizing the protection of the submarine cable.

Description

Technical Field

[0001] The present invention relates to the technical field of ship anchor blocking equipment, in particular to a fixed device and construction method for blocking ship anchors in a submarine cable protection area. Background Art

[0002] A submarine cable is a wire wrapped with insulating material laid on the seabed, which is divided into submarine communication cables and submarine power cables. The submarine cables in the archipelago cover a wide area and have a long path, and are the "lifeline" for power transmission in the archipelago. In recent years, due to seabed scouring and silting, when the thickness of the submarine cable covering layer is insufficient, it is easily damaged by the anchors of traditional waterways, dragging anchors in the anchorage, and out-of-control ships. Once the submarine cable is damaged, a large amount of manpower and material resources are required for repair. Moreover, the repair period at sea is relatively long compared to that on land, which will seriously affect the normal life and production of the island residents.

[0003] For example, in a Chinese invention patent with the application number CN202111162021.X and the name of a submarine cable anti-anchor damage device with a protection plate and its working method, it includes a protection shell outside the submarine cable and protection plates on both sides of the protection shell for preventing the protection shell from being hooked by the ship anchor. Each of the protection plates is rotatably connected to the upper ends on both sides of the protection shell, and a tension spring is connected between each protection plate and the outer side wall of the protection shell.

[0004] Through the protection of the protection plate in the above technical solution, the ship anchor hooks the protection plate but cannot stably hook the protection plate, so that the protection shell is not damaged. Therefore, it can effectively prevent the ship anchor from hooking and damaging the submarine cable. However, in actual operation, the ship anchor will hook the protection shell from multiple directions and then overturn the protection shell. At that time, the protection shell cannot effectively protect the submarine cable.

[0005] Therefore, in order to effectively protect the submarine cable, a fixed device and construction method for blocking ship anchors in a submarine cable protection area are provided. Through the contact between the ship anchor and the anchor chain, the anchor chain transmits the anchor holding force of the ship anchor to the steel pipe anchor, and the steel pipe anchor relies on its own uplift resistance or its own gravity to resist the anchor holding force of the ship anchor, so that the ship anchor stops moving before hooking the submarine cable, thereby realizing the protection of the submarine cable. Summary of the Invention

[0006] The present invention is to overcome the above-mentioned defects in the prior art and provide a fixed device and construction method for blocking ship anchors in a submarine cable protection area.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: A fixed device for a submarine cable protection area blocking ship anchor, comprising a steel pipe anchor, a branch anchor chain, a main anchor chain, a Kent shackle and a shackle. The steel pipe anchor includes a steel pipe, an upper suspension ring located at the upper end of the outer wall of the steel pipe, an anchor chain connection ring located in the middle of the outer wall of the steel pipe, and a lower suspension ring located at the lower end of the outer wall of the steel pipe. The steel pipe anchors at the head and tail ends are connected by the main anchor chain.

[0008] As a preferred solution of the present invention, several steel pipe anchors are also arranged between the steel pipe anchors at the head and tail ends, and the several steel pipe anchors are also connected by the main anchor chain.

[0009] As a preferred solution of the present invention, several steel pipe anchors are also arranged at the upper end or the lower end of the steel pipe anchors at the head and tail ends, and the several steel pipe anchors are connected to the main anchor chain connecting the steel pipe anchors at the head and tail ends by the branch anchor chain.

[0010] As a preferred solution of the present invention, the steel pipe anchor and the main anchor chain are connected by a shackle, the steel pipe anchor and the branch anchor chain are also connected by a shackle, and the main anchor chain and the branch anchor chain are connected by a Kent shackle.

[0011] As a preferred solution of the present invention, the upper suspension ring includes an upper suspension ring body and upper suspension ring stiffening plates welded on both sides of the upper suspension ring body; the anchor chain connection ring includes a connection ring body, an internal stiffening plate at the lower end of the connection ring body, and connection ring stiffening plates on both sides of the connection ring body. The upper suspension ring, the anchor chain connection ring, and the lower suspension ring are all welded on the steel pipe.

[0012] As a preferred solution of the present invention, two of each of the upper suspension ring, the anchor chain connection ring, and the lower suspension ring are arranged on one steel pipe, and they are symmetrically arranged on both sides of the axis of the steel pipe. The upper suspension ring, the anchor chain connection ring, and the lower suspension ring on the same side are located on the same vertical line.

[0013] As a preferred solution of the present invention, the steel pipe anchor includes a steel strip and a steel pipe stiffening plate; the steel strip is externally hoop-shaped on the top of the steel pipe, and the steel pipe stiffening plates are circumferentially arranged inside the steel pipe anchor.

[0014] As a preferred solution of the present invention, the steel pipe anchor includes a sacrificial anode, a limiting block, and a fixing steel strip; the upper and lower ends of the sacrificial anode are limited by the limiting block, and the limiting block is welded on the steel pipe; the sacrificial anode is wrapped with a plurality of fixing steel strips, and both ends of the fixing steel strip are welded on the steel pipe.

[0015] A construction method for a fixed device for a submarine cable protection area blocking ship anchor, comprising

[0016] Step 1: After the ship is positioned at the location of the submarine cable, on the ship's deck, the first steel pipe anchor is connected to the first section of the main anchor chain through a shackle, and the first steel pipe anchor and one end of the first section of the main anchor chain are lowered. The first steel pipe anchor is driven into the seabed, and the other end of the main anchor chain is fixed to the ship.

[0017] Step 2: The ship moves to the next positioning point. The next steel pipe anchor is connected to the other end of the first section of the main anchor chain through a shackle, and is lowered and driven into the designated position.

[0018] Step 3: Repeat Step 2 until the last steel pipe anchor. After the ship moves and is positioned, on the ship's deck, the last steel pipe anchor and the last main anchor chain are connected through a shackle, and the last steel pipe anchor is lowered and driven in.

[0019] A construction method for a fixed device of a ship anchor for blocking a submarine cable protection area, including

[0020] Step 1: After the ship is positioned at the location of the submarine cable, on the ship's deck, the first steel pipe anchor is connected to the first section of the main anchor chain through a shackle, and the first steel pipe anchor and one end of the first section of the main anchor chain are lowered. The other end of the main anchor chain is fixed to the ship.

[0021] Step 2: The ship moves to the next positioning point. One end of the branch anchor chain is connected to the main anchor chain through a Kent shackle, and the other end of the branch anchor chain is connected to the next steel pipe anchor through a shackle. The next steel pipe anchor is located above or below the first steel pipe anchor, and then the next steel pipe anchor is lowered.

[0022] Step 3: Repeat Step 2 until the last steel pipe anchor. After the ship moves and is positioned, on the ship's deck, the last steel pipe anchor and the main anchor chain are connected through a shackle, and the last steel pipe anchor is lowered.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention forms a rigid barrier by connecting several steel pipe anchors with multiple main anchor chains. One end of the steel pipe anchor is immersed in the seabed, and the rigid barrier resists the anchor grab force of the ship anchor by its own uplift force, so that the ship anchor stops moving before hooking the submarine cable, so as to realize the protection of the submarine cable.

[0025] 2. The present invention adds steel pipe anchors at the upper or lower ends of the first and last steel pipe anchors, increases the protection area of the submarine cable, and uses the gravity of parts such as steel pipe anchors, branch anchor chains, and main anchor chains to resist the anchor grab force of the ship anchor, increasing the probability of capturing the ship anchor and protecting the submarine cable to a greater extent.

[0026] 3. Sacrificial anodes are arranged outside the steel pipe anchors of the present invention. By the protection principle of sacrificial anodes, the corrosion of the steel pipe anchors is avoided, the service life of the steel pipe anchors is prolonged, and it is beneficial to the protection of the submarine cable.

[0027] 4. The upper suspension rings, anchor chain connection rings, and lower suspension rings symmetrically arranged on the steel pipe of the present invention, and the upper suspension rings, anchor chain connection rings, and lower suspension rings on the same side are located on the same vertical line, enabling both sides of the steel pipe anchor to be connected to the main anchor chain. At the same time, it is also beneficial to the positioning and installation among the upper suspension rings, anchor chain connection rings, and lower suspension rings.

[0028] 5. The steel strip of the present invention is externally clamped to the top of the steel pipe, and the steel strip can play a role in tightly clamping the top of the steel pipe anchor to prevent the steel pipe anchor from deforming under external forces; the steel pipe stiffening plates are circumferentially arranged inside the steel pipe anchor, and the internally provided steel pipe stiffening plates increase the strength of the steel pipe anchor and prevent the steel pipe anchor from deforming. Description of the Drawings

[0029] Figure 1 is a schematic structural view of the steel pipe anchor of the present invention;

[0030] Figure 2 is a schematic structural view of Embodiment 1 of the present invention;

[0031] Figure 3 is a schematic structural view of Embodiment 2 of the present invention;

[0032] In the figure, reference numerals: steel pipe anchor 1, branch anchor chain 2, main anchor chain 3, Kent shackle 4, shackle 5, steel pipe 11, upper suspension ring 12, anchor chain connection ring 13, lower suspension ring 14, steel strip 15, steel pipe stiffening plate 16, sacrificial anode 17, limit block 18, fixed steel strip 19, upper suspension ring body 121, upper suspension ring stiffening plate 122, connection ring body 131, internal stiffening plate 132, connection ring stiffening plate 133. Detailed Embodiments

[0033] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0034] Embodiment 1:

[0035] As Figure 1-2 shown, a fixed device for a submarine cable protection area blocking ship anchor includes a steel pipe anchor 1, a branch anchor chain 2, a main anchor chain 3, a Kent shackle 4, and a shackle 5. The steel pipe anchor 1 includes a steel pipe 11, an upper suspension ring 12 located at the upper end of the outer wall of the steel pipe 11, an anchor chain connection ring 13 located at the middle end of the outer wall of the steel pipe 11, and a lower suspension ring 14 located at the lower end of the outer wall of the steel pipe 11. The upper suspension ring 12, the anchor chain connection ring 13, and the lower suspension ring 14 are all welded to the steel pipe 11, and the steel pipe anchors 1 at both ends are connected by the main anchor chain 3.

[0036] A number of steel pipe anchors 1 are also arranged between the steel pipe anchors 1 at both ends, and the a number of steel pipe anchors 1 are also connected by the main anchor chain 3. The steel pipe anchor 1 and the main anchor chain 3 are connected by a shackle 5.

[0037] Specifically, the lower end of the steel pipe anchor 1 is driven into the seabed. The part of the steel pipe anchor 1 submerged in the seabed should be lower than the lower suspension ring 14 to avoid damage to the lower suspension ring 14. At the same time, the lower suspension ring 14 also serves as a reference for driving the lower end of the steel pipe anchor 1 into the seabed.

[0038] To ensure the balance of the forces on the upper and lower ends of the steel pipe anchor 1, based on the condition that the lower end of the steel pipe anchor 1 is submerged in the seabed, the steel pipe anchor 1 is connected to one end of the main anchor chain 3 through the upper suspension ring 12 at its upper end. Correspondingly, the other end of the main anchor chain 3 is connected to the adjacent steel pipe anchor 1 through the upper suspension ring 12 of the adjacent steel pipe anchor 1; at the same time, the steel pipe anchor 1 can also be connected to one end of the main anchor chain 3 through the anchor chain connection ring 13 in the middle of it. Correspondingly, the other end of the main anchor chain 3 is connected to the adjacent steel pipe anchor 1 through the anchor chain connection ring 13 on the adjacent steel pipe anchor 1.

[0039] Several steel pipe anchors 1 are connected to multiple main anchor chains 3 to form a rigid barrier, and several steel pipe anchors 1 are connected by multiple main anchor chains 3 at the same height to make the upper and lower forces of the rigid barrier uniform. The number of steel pipe anchors 1 and the length of the main anchor chain 3 are set according to the length of the submarine cable protection area.

[0040] In practical applications, the ship's anchor in the submarine cable protection area will first contact the anchor chain of the rigid barrier. The anchor chain transmits the anchor holding force of the ship's anchor to the entire rigid barrier, and the rigid barrier relies on its own uplift resistance to resist the anchor holding force of the ship's anchor, so that the ship's anchor stops moving before hooking the submarine cable, so as to achieve the protection of the submarine cable.

[0041] The upper suspension ring 12 includes an upper suspension ring body 121 and upper suspension ring stiffening plates 122 welded on both sides of the upper suspension ring body 121; the anchor chain connection ring 13 includes a connection ring body 131, an internal stiffening plate 132 at the lower end of the connection ring body 131, and connection ring stiffening plates 133 on both sides of the connection ring body 131.

[0042] Two upper suspension rings 12, anchor chain connection rings 13, and lower suspension rings 14 are arranged on a steel pipe 11 respectively, and they are symmetrically arranged on both sides of the axis of the steel pipe 11. The upper suspension rings 12, anchor chain connection rings 13, and lower suspension rings 14 on the same side are located on the same vertical line.

[0043] Specifically, the steel pipe anchor 1 is mainly connected to the main anchor chain 3 through the upper suspension ring 12 or the anchor chain connection ring 13, and then the main anchor chain 3 is connected to the adjacent steel pipe anchor 1. Correspondingly, the upper suspension ring 12 or the anchor chain connection ring 13 is subjected to much greater force than the lower suspension ring 14. Therefore, upper suspension ring stiffening plates 122 are provided on the upper suspension ring 12, and internal stiffening plates 132 and connection ring stiffening plates 133 are provided on the anchor chain connection ring 13 to increase the strength of the upper suspension ring 12 and the anchor chain connection ring 13 itself and the connection strength with the steel pipe 11.

[0044] The upper suspension rings 12, anchor chain connection rings 13, and lower suspension rings 14 are symmetrically arranged on the steel pipe 11, and the upper suspension rings 12, anchor chain connection rings 13, and lower suspension rings 14 on the same side are located on the same vertical line, enabling both sides of the steel pipe anchor 1 to be connected to the main anchor chain 3. At the same time, it is also beneficial for the positioning and installation among the upper suspension rings 12, anchor chain connection rings 13, and lower suspension rings 14.

[0045] The steel pipe anchor 1 includes a steel strip 15 and steel pipe stiffening plates 16; the steel strip 15 is externally hooped on the top of the steel pipe 11, and the steel strip 15 can play a role in tightly hooping the top of the steel pipe anchor 1 to prevent the steel pipe anchor 1 from deforming under external forces; the steel pipe stiffening plates 16 are circumferentially arranged inside the steel pipe anchor 1, and the internal steel pipe stiffening plates 16 increase the strength of the steel pipe anchor 1 and prevent the relatively long steel pipe anchor 1 from deforming.

[0046] The steel pipe anchor 1 includes a sacrificial anode 17, a limit block 18, and a fixing steel strip 19; the upper and lower ends of the sacrificial anode 17 are limited by the limit block 18. The limit block 18 is a trapezoidal steel section with one end abutted against the sacrificial anode 17, and the limit block 18 is welded to the steel pipe 11; the sacrificial anode 17 is wrapped with a plurality of fixing steel strips 19, and both ends of the fixing steel strip 19 are welded to the steel pipe 11. The fixing steel strip 19 plays a protective role for the sacrificial anode 17, and the sacrificial anode 17 prevents the steel pipe anchor 1 from being corroded through the protection principle of the sacrificial anode. The material of the sacrificial anode 17 is preferably an aluminum-zinc-indium ternary aluminum alloy, and of course, it can also be an aluminum-zinc alloy.

[0047] Specifically, the sacrificial anode cathodic protection method (abbreviated as the sacrificial anode protection method) is a method that uses the electrochemical principle to protect the cathode material while the anode material is corroded and consumed.

[0048] The protection principle of the sacrificial anode is also the working principle of the primary battery. In an electrolyte solution (such as seawater), a metal with a lower electrode potential than the metal to be protected is used as the anode, and the corrosion current of the low-potential metal is used as the anti-corrosion current of the high-potential metal to be protected. When different metals are combined in an electrolyte solution such as seawater, due to their different electrode potentials, a potential difference is generated, forming a large battery. As the anode metal dissolves, electrons on the anode continuously flow to the cathode, and the cathode metal with a high potential obtains electrons and is protected. In actual application, the sacrificial anode 17 is the anode and undergoes an oxidation reaction; the steel pipe anchor 1 is the cathode and undergoes a reduction reaction.

[0049] The sacrificial anode protection technology has the following advantages: simple installation and maintenance, low cost, no need for external current, little environmental pollution, and good corrosion protection control effect. This method can prevent the protected metal from dissolving into the electrolyte (including seawater and other media).

[0050] Specifically implement a fixed device for a ship anchor in a submarine cable protection area, including the following steps:

[0051] Step 1: After the ship is positioned at the submarine cable location, on the ship's deck, the first steel pipe anchor 1 is connected to the first section of the main anchor chain 3 through a shackle 5, and the first steel pipe anchor 1 and one end of the first section of the main anchor chain 3 are lowered. The first steel pipe anchor 1 is driven into the seabed, and the other end of the main anchor chain 3 is fixed on the ship;

[0052] Step 2: The ship moves to the next fixed point. The next steel pipe anchor 1 is connected to the other end of the first section of the main anchor chain 3 through a shackle 5 and is lowered and driven into the designated position;

[0053] Step 3: Repeat Step 2 until the last steel pipe anchor 1. After the ship moves and is positioned, on the ship's deck, the last steel pipe anchor 1 and the last main anchor chain 4 are connected through a shackle 5, and the last steel pipe anchor 1 is lowered and driven in to complete the protection of the submarine cable protection area.

[0054] The present invention forms a rigid barrier by connecting several steel pipe anchors with multiple main anchor chains. One end of the steel pipe anchor is immersed in the seabed, and the rigid barrier relies on its own uplift resistance to resist the anchor grab force of the ship anchor, so that the ship anchor stops moving before hooking the submarine cable, thereby realizing the protection of the submarine cable.

[0055] Embodiment 2:

[0056] As Figure 1 、 Figure 3 shown, a fixed device for a ship anchor in a submarine cable protection area includes a steel pipe anchor 1, a branch anchor chain 2, a main anchor chain 3, a Kent shackle 4, and a shackle 5. The steel pipe anchor 1 includes a steel pipe 11, an upper hanging ring 12 located at the upper end of the outer wall of the steel pipe 11, an anchor chain connecting ring 13 located in the middle of the outer wall of the steel pipe 11, and a lower hanging ring 14 located at the lower end of the outer wall of the steel pipe 11. The steel pipe anchors 1 at the head and tail ends are connected by the main anchor chain 3.

[0057] At the upper or lower ends of the steel pipe anchors 1 at the head and tail ends, several steel pipe anchors 1 are also arranged. The several steel pipe anchors 1 are connected to the main anchor chain 3 connecting the steel pipe anchors 1 at the head and tail ends through the branch anchor chain 2; the branch anchor chain 2 is a stud link chain, and the main anchor chain 3 is a studless anchor chain.

[0058] The steel pipe anchor 1 and the main anchor chain 3 are connected through a shackle 5. The steel pipe anchor 1 and the branch anchor chain 2 are also connected through a shackle 5. The main anchor chain 3 and the branch anchor chain 2 are connected through a Kent shackle 4.

[0059] Specifically, the head steel pipe anchor 1 is connected to one end of the main anchor chain 3 through the anchor chain connecting ring 13 and the shackle 5. The other end of the main anchor chain 3 is connected to the anchor chain connecting ring 13 of the tail steel pipe anchor 1 through the shackle 5. A number of steel pipe anchors 1 are arranged at the upper or lower ends of the steel pipe anchors 1 at both the head and tail ends. The steel pipe anchors 1 at the upper or lower ends are connected to the branch anchor chain 2 through the anchor chain connecting ring 13 and the shackle 5. The branch anchor chain 2 is connected to the main anchor chain 3 through the Kent shackle 4. The steel pipe anchors 1 at both the head and tail ends and their upper or lower ends are not driven into the seabed and cover the submarine cable protection area to form an energy dissipation barrier.

[0060] In practical applications, since the energy dissipation barrier covers the periphery of the submarine cable, the ship's anchor will first come into contact with the anchor chain of the energy dissipation barrier within the submarine cable protection area. The anchor chain transfers the anchor holding force of the ship's anchor to the entire energy dissipation barrier, and the gravity of the energy dissipation barrier itself resists the anchor holding force of the ship's anchor, thereby stopping the movement of the ship's anchor to achieve the protection of the submarine cable.

[0061] The difference between Embodiment 2 and Embodiment 1 is that Embodiment 1 resists the anchor holding force of the ship's anchor through the gravity of parts such as the steel pipe anchor 1 and the main anchor chain 3 and the resistance generated by the seabed where the steel pipe anchor 1 is buried in the seabed, while Embodiment 2 resists the anchor holding force of the ship's anchor through the gravity of parts such as the steel pipe anchor 1, the branch anchor chain 2, and the main anchor chain 3.

[0062] In Embodiment 2, compared with Embodiment 1, steel pipe anchors 1 are added at both the upper or lower ends of the steel pipe anchor 1, increasing the protection area for the submarine cable, increasing the probability of capturing the ship's anchor, and protecting the submarine cable in a larger range.

[0063] The upper sling ring 12 includes an upper sling ring body 121 and upper sling ring stiffening plates 122 welded on both sides of the upper sling ring body 121; the anchor chain connecting ring 13 includes a connecting ring body 131, an internal stiffening plate 132 at the lower end of the connecting ring body 131, and connecting ring stiffening plates 133 on both sides of the connecting ring body 131. The upper sling ring 12, the anchor chain connecting ring 13, and the lower sling ring 14 are all welded on the steel pipe 11.

[0064] Two upper sling rings 12, anchor chain connecting rings 13, and lower sling rings 14 are arranged on one steel pipe 11 respectively, and are symmetrically arranged on both sides of the axis of the steel pipe 11. The upper sling rings 12, anchor chain connecting rings 13, and lower sling rings 14 on the same side are located on the same vertical line.

[0065] Specifically, both the stay anchor chain 2 and the main anchor chain 3 are connected to the steel pipe anchors 1 at different positions through the anchor chain connecting rings 13 and shackles 5. Therefore, the anchor chain connecting rings 13 on the steel pipe anchors 1 are subjected to relatively large forces. Therefore, internal stiffening plates 132 and connecting ring stiffening plates 133 need to be provided on the anchor chain connecting rings 13 to enhance the connection between the anchor chain connecting rings 13 and the steel pipes 11. At the same time, the internal stiffening plates 132 and connecting ring stiffening plates 133 are also used to ensure the strength of the anchor chain connecting rings 13 and prevent the anchor chain connecting rings 13 from deforming.

[0066] The steel pipe anchor 1 includes a steel strip 15 and a steel pipe stiffening plate 16. The steel strip 15 is externally hoop-shaped on the top of the steel pipe 11. The steel strip 15 can play a role in tightly hooping the top of the steel pipe anchor 1 and prevent the steel pipe anchor 1 from deforming under external forces. The steel pipe stiffening plates 16 are circumferentially arranged inside the steel pipe anchor 1. The internally provided steel pipe stiffening plates 16 increase the strength of the steel pipe anchor 1 and prevent the relatively long steel pipe anchor 1 from deforming.

[0067] The steel pipe anchor 1 includes a sacrificial anode 17, a limit block 18, and a fixing steel strip 19. The upper and lower ends of the sacrificial anode 17 are limited by the limit blocks 18. The limit blocks 18 are trapezoidal steel bars with one end abutted against the sacrificial anode 17, and the limit blocks 18 are welded to the steel pipe 11. The sacrificial anode 17 is wrapped with a plurality of fixing steel strips 19. The two ends of the fixing steel strip 19 are welded to the steel pipe 11. The fixing steel strip 19 plays a protective role for the sacrificial anode 17. The sacrificial anode 17 avoids the corrosion of the steel pipe anchor 1 through the protection principle of the sacrificial anode. The material of the sacrificial anode 17 is preferably an aluminum-zinc-indium ternary aluminum alloy, and of course, it can also be an aluminum-zinc alloy.

[0068] Specifically, the implementation of a fixed device for a submarine cable protection area blocking ship anchor includes the following steps:

[0069] Step 1: After the ship is positioned at the submarine cable position, on the ship's deck, the first steel pipe anchor 1 is connected to the first section of the main anchor chain 3 through a shackle 5, and the first steel pipe anchor 1 and one end of the first section of the main anchor chain 3 are lowered. The other end of the main anchor chain 3 is fixed to the ship.

[0070] Step 2: The ship is shifted to the next positioning point. One end of the stay anchor chain 2 is connected to the main anchor chain 3 through a Kent shackle 4. The other end of the stay anchor chain 2 is connected to the next steel pipe anchor 1 through a shackle 5. The next steel pipe anchor 1 is located above or below the first steel pipe anchor 1. Subsequently, the next steel pipe anchor 1 is lowered.

[0071] Step 3: Repeat Step 2 until the last steel pipe anchor 1. After the ship is shifted and positioned, on the ship's deck, the last steel pipe anchor 1 and the main anchor chain 3 are connected through a shackle 5, and the last steel pipe anchor 1 is lowered.

[0072] Embodiment 3:

[0073] The difference between the third embodiment and the first embodiment is that in the third embodiment, the steel pipe anchor 1 is not driven into the seabed, but is laid flat on the upper end of a single submarine cable in the submarine cable protection area in combination with the main anchor chain 3. The third embodiment is applicable to the protection of a single submarine cable in the submarine cable protection area, and the gravity of parts such as the steel pipe anchor 1 and the main anchor chain 3 is used to resist the anchor holding force of the ship anchor, reducing the excessive investment in parts such as the steel pipe anchor 1 and the main anchor chain 3.

[0074] Embodiment Four:

[0075] The difference between the fourth embodiment and the second embodiment is that a plurality of steel pipe anchors 1 are provided at both the upper and lower ends of the head and tail steel pipe anchors 1 in the fourth embodiment, increasing the protection area of the submarine cable protection area. The fourth embodiment is applicable to the protection of aggregated submarine cables in the submarine cable protection area.

[0076] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0077] Although terms such as steel pipe anchor 1, branch anchor chain 2, main anchor chain 3, kentledge shackle 4, shackle 5, steel pipe 11, upper lifting ring 12, anchor chain connecting ring 13, lower lifting ring 14, steel strip 15, steel pipe stiffening plate 16, sacrificial anode 17, limit block 18, fixed steel strip 19, upper lifting ring body 121, upper lifting ring stiffening plate 122, connecting ring body 131, internal stiffening plate 132, connecting ring stiffening plate 133 are used more in this article, the possibility of using other terms is not excluded; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A fixed device for a submarine cable protection area blocking ship anchor, characterized in that: It includes a steel pipe anchor (1), a supporting anchor chain (2), a main anchor chain (3), a Kent shackle (4) and a shackle (5). The steel pipe anchor (1) includes a steel pipe (11), an upper hanging ring (12) located at the upper end of the outer wall of the steel pipe (11), an anchor chain connecting ring (13) located at the middle end of the outer wall of the steel pipe (11), and a lower hanging ring (14) located at the lower end of the outer wall of the steel pipe (11). The steel pipe anchors (1) at the head and tail ends are connected by the main anchor chain (3); several steel pipe anchors (1) are also arranged between the steel pipe anchors (1) at the head and tail ends, and several of the steel pipe anchors (1) are also connected by the main anchor chain (3); several steel pipe anchors (1) are also arranged at the upper end or the lower end of the steel pipe anchors (1) at the head and tail ends, and several of the steel pipe anchors (1) are connected to the main anchor chain (3) connecting the steel pipe anchors (1) at the head and tail ends through the supporting anchor chain (2); the upper hanging ring (12) includes an upper hanging ring body (121) and upper hanging ring stiffening plates (122) welded on both sides of the upper hanging ring body (121); the anchor chain connecting ring (13) includes a connecting ring body (131), an internal stiffening plate (132) at the lower end of the connecting ring body (131), and connecting ring stiffening plates (133) on both sides of the connecting ring body (131). The upper hanging ring (12), the anchor chain connecting ring (13), and the lower hanging ring (14) are all welded on the steel pipe (11).

2. The fixed device for a submarine cable protection area blocking ship anchor according to claim 1, characterized in that: The steel pipe anchor (1) and the main anchor chain (3) are connected by a shackle (5), the steel pipe anchor (1) and the supporting anchor chain (2) are also connected by a shackle (5), and the main anchor chain (3) and the supporting anchor chain (2) are connected by a Kent shackle (4).

3. The fixed device for a submarine cable protection area blocking ship anchor according to claim 1, characterized in that: Two of each of the upper hanging ring (12), the anchor chain connecting ring (13), and the lower hanging ring (14) are arranged on one steel pipe (11), and they are symmetrically arranged on both sides of the axis of the steel pipe (11). The upper hanging ring (12), the anchor chain connecting ring (13), and the lower hanging ring (14) on the same side are located on the same vertical line.

4. A fixed device for a submarine cable protection area blocking ship anchor according to claim 1, characterized in that: The steel pipe anchor (1) includes a steel strip (15) and a steel pipe stiffening plate (16); the steel strip (15) is externally hooped on the top of the steel pipe (11), and the steel pipe stiffening plates (16) are circumferentially arranged inside the steel pipe anchor (1).

5. The fixed device for a submarine cable protection area blocking ship anchor according to claim 1, characterized in that: The steel pipe anchor (1) includes a sacrificial anode (17), a limiting block (18), and a fixing steel strip (19); the upper and lower ends of the sacrificial anode (17) are limited by the limiting block (18), and the limiting block (18) is welded on the steel pipe (11); the sacrificial anode (17) is wrapped with several fixing steel strips (19), and the two ends of the fixing steel strip (19) are welded on the steel pipe (11).

6. A construction method of a fixed device for a submarine cable protection area blocking ship anchor, characterized in that, Referring to the fixed device for the submarine cable protection area blocking ship anchor according to any one of claims 1-5, including Step 1: After the ship is positioned at the submarine cable position, connect the first steel pipe anchor (1) to the first section of the main anchor chain (3) by a shackle (5) on the ship's deck and lower the first steel pipe anchor (1) and one end of the first section of the main anchor chain (3). The first steel pipe anchor (1) is driven into the seabed, and the other end of the main anchor chain (3) is fixed on the ship; Step 2: The ship is shifted to the next fixed point. The next steel pipe anchor (1) is connected to the other end of the first section of the main anchor chain (3) through a shackle (5), and then lowered and driven into the designated position. Step 3: Repeat Step 2 until the last steel pipe anchor (1). After the ship is shifted and positioned, on the ship's deck, connect the last steel pipe anchor (1) and the last main anchor chain (4) through a shackle (5), and then lower and drive the last steel pipe anchor (1).

7. A construction method for a fixed device of a submarine cable protection area blocking ship anchor, characterized in that, The fixed device for the submarine cable protection area blocking ship anchor as claimed in any one of claims 1-5, comprising Step 1: After the ship is positioned at the submarine cable location, on the ship's deck, connect the first steel pipe anchor (1) to the first section of the main anchor chain (3) through a shackle (5), and lower one end of the first steel pipe anchor (1) and the first section of the main anchor chain (3). The other end of the main anchor chain (3) is fixed on the ship. Step 2: The ship is shifted to the next fixed point. One end of the branch anchor chain (2) is connected to the main anchor chain (3) through a Kent shackle (4), and the other end of the branch anchor chain (2) is connected to the next steel pipe anchor (1) through a shackle (5). The next steel pipe anchor (1) is located above or below the first steel pipe anchor (1), and then lower the next steel pipe anchor (1). Step 3: Repeat Step 2 until the last steel pipe anchor (1). After the ship is shifted and positioned, on the ship's deck, connect the last steel pipe anchor (1) and the main anchor chain (3) through a shackle (5), and then lower the last steel pipe anchor (1).

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