Water-blocking type submarine cable

Abstract

The application discloses a water-blocking type submarine cable, which comprises a cable body, a plurality of floating packages on the cable body, a plurality of polyethylene positioning rings arranged on the surface of the cable body, a fixing plate arranged on the lower side of the floating package, fixing arms arranged at the two ends of the fixing plate, fixing sleeves with two central axes on the same straight line and spaced apart arranged on the lower sides of the two fixing arms, a magnetic sleeve arranged between the two fixing sleeves, a steel wire rope arranged between the plurality of floating packages and penetrating through the two fixing sleeves and the magnetic sleeve and being attracted in the magnetic sleeve, a connecting arm with the upper end connected with the fixing sleeve arranged on the lower side of the fixing sleeve on one side, a fixing shaft arranged on the lower end of the connecting arm, a lifting ring arranged on the upper side of the polyethylene positioning ring and used for penetrating through the fixing shaft, a baffle arranged on the lower side of the magnetic sleeve and used for abutting on the end of the fixing shaft away from the connecting arm after swinging downward, and a clamping plate arranged between the two fixing arms and used for abutting on the baffle swinging upward.

Description

Technical Field

[0001] This invention relates to the field of cable design technology, and in particular to a water-blocking submarine cable. Background Technology

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

[0003] The internal structure of a submarine cable, from the inside out, generally includes optical fiber, fiber optic paste, stainless steel tube, inner armor steel wire, water-blocking adhesive, copper tube, polyethylene insulation, corrugated steel tape, and polyethylene sheath.

[0004] Submarine cable laying mainly includes three stages: cable route survey and clearing, cable laying, and burial protection. During cable laying, the angle of entry into the water and the laying tension of the cable are controlled by controlling the speed of the laying vessel and the cable release speed, so as to avoid damage to the cable due to excessive bending radius or excessive tension.

[0005] During the laying of cables in the shallow water section, the cable unwound from the cable laying vessel needs to be connected to a buoy at intervals. The cable laying vessel is stationed 4.5 kilometers from the coast, and the cable end is pulled ashore by a tractor on the shore. Once the cable end is on the shore, the buoy can be removed, allowing the cable to sink to the seabed.

[0006] Meanwhile, during the deep-sea section, the cable laying vessel releases the cable and uses underwater monitors and underwater remote-controlled vehicles to continuously monitor and adjust the vessel's forward speed, direction, and cable laying speed to avoid uneven terrain and rocks and prevent damage to the cable.

[0007] When laying cables in shallow waters and needing to remove individual buoys from the cables, construction workers often need to drive boats to each buoy location to disconnect the buoys from the cables. The entire process of removing the buoys is very time-consuming and labor-intensive. Summary of the Invention

[0008] The purpose of this invention is to provide a water-blocking submarine cable that allows for relatively easy removal of the buoy on the cable body.

[0009] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a water-blocking submarine cable, comprising a cable body and multiple floats located on the cable body. The cable body, from the inside out, includes an optical fiber, fiber optic paste, a stainless steel tube, an inner armor steel wire, water-blocking adhesive, a copper tube, polyethylene insulation, corrugated steel tape, and a polyethylene sheath. Multiple polyethylene positioning rings are evenly spaced along the extension direction of the cable body on the surface of the cable body. The multiple floats correspond to the positions of the multiple polyethylene positioning rings. A fixing plate is provided on the lower side of each float. Fixing arms are provided at both ends of the fixing plate. Two central axes are provided on the lower side of each of the two fixing arms. The system comprises fixed sleeves spaced apart on an online platform, with a magnetic sleeve between two fixed sleeves. A steel wire rope, passing through both fixed sleeves and the magnetic sleeve and attracted within the magnetic sleeve, is positioned between multiple floating bags. A connecting arm, connected to the upper end of one of the fixed sleeves, is located on the lower side of the fixed sleeve. A fixed shaft is located at the lower end of the connecting arm. A lifting ring, through which the fixed shaft passes, is located on the upper side of the polyethylene positioning ring. A guide arc surface is provided on the end face of the fixed shaft away from the connecting arm, allowing the lifting ring to detach. A baffle, swinging downwards, abuts against the end of the fixed shaft away from the connecting arm on the lower side of the magnetic sleeve. A locking plate, abutting against the baffle, swings upwards between the two fixed arms.

[0010] A further feature of the present invention is that both the fixed shaft and the lifting ring have circular cross-sections.

[0011] A further provision of the present invention is that a steel ring for welding the lifting ring is provided on the periphery of the middle part of the polyethylene positioning ring.

[0012] A further feature of the present invention is that the gap width between the two fixed sleeves is greater than the thickness of the magnetic sleeve.

[0013] A further feature of the present invention is that the inner diameter of the magnetic sleeve is larger than the outer diameter of the wire rope cross-section.

[0014] A further feature of the present invention is that: canvas strips are provided on both sides of the lower surface of the float, and through holes are provided on both sides of the canvas strips away from the float; a threaded shaft passing through the through hole is provided on the lower side of the fixing plate, and a locking nut is threadedly connected to the threaded shaft.

[0015] A further feature of the present invention is that the end of the canvas strip near the float is provided with a reinforcing adhesive end that is bonded to the surface of the float.

[0016] A further feature of the present invention is that the outer wall of the polyethylene sheath is also coated with a polyurea waterproof coating layer.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. When the float needs to be connected to the cable body, rotate the magnetic sleeve on the wire rope to make the baffle swing upward and move away from the end of the fixed shaft. Then the fixed shaft can pass through the lifting ring on the polyethylene positioning ring. Then rotate the magnetic sleeve on the wire rope in the opposite direction to make the baffle swing downward and abut against the end of the fixed shaft. Since the magnetic sleeve is attracted to the wire rope, the magnetic sleeve will not rotate automatically as long as the wire rope does not rotate. Thus, the baffle stabilizes and limits the lifting ring on the fixed shaft. At this time, the connection between the float and the cable body is completed, so that the cable body floats on the sea surface through multiple floats.

[0019] When the cable body floats on the sponge with multiple floats, the floats can be connected together by steel wire ropes. When it is necessary to remove multiple floats, the construction workers only need to rotate one end of the steel wire rope. As the end of the steel wire rope rotates, the torsional force on the steel wire rope can be transmitted along the steel wire rope. When the torsional force is transmitted to the steel wire rope in the first float position, the torsional force can drive the steel wire rope to rotate. Since the magnetic sleeve is attracted to the steel wire rope, the rotation of the steel wire rope can drive the magnetic sleeve to rotate, causing the baffle to swing upward and move away from the end of the fixed shaft. At this time, since the part of the cable body not supported by the floats will sag on the seabed, the center of gravity of the cable body in the float position will shift towards the side of the sagding cable body. After the baffle loses its blocking effect, the lifting ring can quickly slide off the fixed shaft, and the cable body in the first float position can fall to the seabed, and finally the separation of the floats and the cable body can be completed.

[0020] As the wire rope continues to rotate, the magnetic sleeve at the first float position cannot continue to rotate because the baffle is pressed against the clamping plate. When the torsional force is transmitted to the wire rope at the next float position, the wire rope at the next float position can rotate and drive the magnetic sleeve to rotate, thus separating the next float from the cable body. At this time, as the torsional force is continuously transmitted along the wire rope, multiple floats can be separated from the cable body one by one. Compared with the need for construction personnel to use small boats to remove the floats one by one, this method is more time-saving and labor-saving.

[0021] Since multiple polyethylene positioning rings are evenly spaced along the extension direction of the cable body, they can play a limiting role after the cable body is buried in the seabed, which helps to improve the stability of the cable body's position after it is buried in the seabed.

[0022] 2. By utilizing the circular cross-sections of both the fixed shaft and the lifting ring, the friction between the fixed shaft and the lifting ring is reduced, which ultimately facilitates the smooth detachment of the lifting ring from the fixed shaft;

[0023] 3. By wrapping a steel ring around the periphery of the middle part of the polyethylene positioning ring, the lifting ring can be welded to the steel ring, which is conducive to the stable connection of the lifting ring to the cable body;

[0024] 4. By utilizing the fact that the gap width between the two fixed sleeves is greater than the thickness of the magnetic sleeve, the frictional force generated between the magnetic sleeve and the two fixed sleeves when rotating is reduced, which ultimately facilitates the smooth rotation of the magnetic sleeve by the wire rope.

[0025] 5. When the baffle abuts against the card plate and causes the magnetic sleeve to not rotate with the wire rope, the continued rotation of the wire rope will generate greater friction between the wire rope and the inner wall of the magnetic sleeve. At this time, the inner diameter of the magnetic sleeve is larger than the outer diameter of the wire rope cross-section, thereby reducing the contact area between the magnetic sleeve and the wire rope, and ultimately reducing the wear of the inner wall of the magnetic sleeve.

[0026] 6. When the float needs to be connected to the fixed plate, the canvas strips on both sides of the lower surface of the float can be used. The threaded shaft on the lower side of the fixed plate can pass through the through hole at the end of the canvas strip away from the float. Then, the lock nut is used to thread it onto the threaded shaft, thus completing the detachable connection between the canvas strip and the fixed plate. Finally, the detachable connection between the float and the fixed plate can be completed, which facilitates the replacement of the float.

[0027] 7. By utilizing the reinforcing adhesive end set at one end of the canvas strip near the floating bag, the reinforcing adhesive end can be bonded to the surface of the floating bag, which is conducive to a stable connection between the canvas strip and the floating bag;

[0028] 8. The outer wall of the polyethylene sheath is also coated with a polyurea waterproof coating. Since the polyurea waterproof coating has good waterproof and water-blocking effects, it can ultimately improve the water-blocking performance of the cable body and help extend the service life of the cable body in the submarine environment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a cross-sectional view of the cable body in this invention;

[0031] Figure 3 This is a partially enlarged view of the connection relationship between the cable body, float, fixing plate and wire rope in this invention, wherein the float is shown exploded.

[0032] Figure 4 This is a partially enlarged view of the connection relationship between the fixing plate and the wire rope in this invention, wherein the magnetic sleeve is shown in an exploded view.

[0033] Figure 5 This is a schematic diagram of the connection relationship between the cable body, the float, the fixing plate and the wire rope in this invention. At this time, the previous float is detached from the cable body, so that the cable body at the position of the previous float falls into the seabed.

[0034] Reference numerals: 1. Cable body; 11. Optical fiber; 12. Fiber optic paste; 13. Stainless steel tube; 14. Inner armor steel wire; 15. Water-blocking adhesive; 16. Copper tube; 17. Polyethylene insulation; 18. Corrugated steel strip; 19. Polyethylene sheath; 2. Float; 21. Canvas strip; 211. Through hole; 212. Reinforced bonding end; 3. Polyethylene positioning ring; 31. Lifting ring; 32. Steel ring; 4. Fixing plate; 41. Fixing arm; 411. Fixing sleeve; 42. Magnetic sleeve; 421. Baffle; 43. Connecting arm; 431. Fixing shaft; 4311. Guide arc surface; 44. Clamping plate; 45. Threaded shaft; 451. Locking nut; 5. Steel wire rope; 6. Polyurea waterproof coating layer. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings.

[0036] A water-blocking submarine cable, referenced Figure 1 , Figure 2 This type of water-blocking submarine cable includes a cable body 1 and multiple floats 2 located on the cable body 1. The cable body 1, from the inside out, includes an optical fiber 11, fiber optic paste 12, a stainless steel tube 13, an inner armor steel wire 14, water-blocking adhesive 15, a copper tube 16, polyethylene insulation 17, corrugated steel strip 18, and a polyethylene sheath 19. The outer wall of the polyethylene sheath 19 is also coated with a polyurea waterproof coating layer 6. This polyurea waterproof coating is a solvent-free, fast-curing, green, environmentally friendly, and elastic waterproof material.

[0037] Reference Figure 1 , Figure 3 Multiple polyethylene positioning rings 3 are also bonded and fixed on the surface of the cable body 1. The multiple polyethylene positioning rings 3 are evenly spaced along the extension direction of the cable body 1, and the multiple floats 2 correspond to the positions of the multiple polyethylene positioning rings 3 respectively. A steel ring 32 is bonded to the periphery of the middle part of the polyethylene positioning ring 3, and a lifting ring 31 is welded on the outer wall of the steel ring 32. The cross-section of the lifting ring 31 is circular.

[0038] Reference Figure 1 , Figure 3 A fixing plate 4 is provided on the lower side of the float 2. Canvas strips 21 are sewn on both sides of the lower surface of the float 2. Through holes 211 are opened on both sides of the canvas strips 21 away from the float 2. At the same time, a threaded shaft 45 passing through the through hole 211 is welded to the lower side of the fixing plate 4. A locking nut 451 is threaded on the threaded shaft 45, which can realize the detachable connection between the float 2 and the fixing plate 4. A reinforcing adhesive end 212 is integrally provided on the end of the canvas strip 21 near the float 2. The reinforcing adhesive end 212 is attached to the surface of the float 2 and sewn to the outer wall of the float 2.

[0039] Reference Figure 3 , Figure 4 Fixed arms 41 are welded to the lower sides of both ends of the fixed plate 4, and two fixed sleeves 411 with their central axes on the same straight line and spaced apart are welded to the lower sides of the two fixed arms 41. A magnetic sleeve 42 is provided between the two fixed sleeves 411, and the gap width between the fixed sleeves 411 is greater than the thickness of the magnetic sleeve 42. At the same time, a steel wire rope 5 is provided between the multiple floats 2. The steel wire rope 5 passes through the two fixed sleeves 411 and the magnetic sleeve 42 and is attracted inside the magnetic sleeve 42. The inner diameter of the magnetic sleeve 42 is greater than the outer diameter of the cross section of the steel wire rope 5 and smaller than the outer diameter of the fixed sleeve 411.

[0040] Reference Figure 3 , Figure 4 , Figure 5 The lower side of the fixed sleeve 411 located on one side is also provided with a connecting arm 43 welded to the upper end of the fixed sleeve 411. The lower end of the connecting arm 43 is welded with a fixed shaft 431, which can be used to pass through the lifting ring 31. The cross-section of the fixed shaft 431 is also circular. At the same time, the end face of the fixed shaft 431 away from the connecting arm 43 is provided with a guide arc surface 4311 for the lifting ring 31 to fall off. The lower side of the magnetic sleeve 42 is welded with a baffle 421 that swings downward and abuts against the end of the fixed shaft 431 away from the connecting arm 43. A locking plate 44 is welded between the two fixed arms 41. The locking plate 44 can be used to abut against the baffle 421 that swings upward, thereby limiting the rotation of the baffle 421 through the locking plate 44. At the same time, the fixed sleeve 411 and the locking plate 44 are both made of stainless steel material that is not attracted by the magnetic sleeve 42.

[0041] Principle: When the float 2 needs to be connected to the cable body 1, the magnetic sleeve 42 on the wire rope 5 is rotated, causing the baffle 421 to swing upward and move away from the end of the fixed shaft 431. Then the fixed shaft 431 can pass through the lifting ring 31 on the polyethylene positioning ring 3. Then the magnetic sleeve 42 on the wire rope 5 is rotated in the opposite direction, causing the baffle 421 to swing downward and abut against the end of the fixed shaft 431. Since the magnetic sleeve 42 is attracted to the wire rope 5, the magnetic sleeve 42 will not rotate automatically as long as the wire rope 5 does not rotate. Thus, the lifting ring 31 on the fixed shaft 431 is stably limited by the baffle 421. At this time, the connection between the float 2 and the cable body 1 is completed, so that the cable body 1 floats on the sea surface through multiple floats 2.

[0042] When the cable body 1 floats on the sponge via multiple floats 2, the floats 2 can be connected together by steel wire ropes 5. When it is necessary to remove multiple floats 2, the construction worker only needs to rotate one end of the steel wire rope 5. As the end of the steel wire rope 5 rotates, the torsional force on the steel wire rope 5 can be transmitted along the steel wire rope 5. When the torsional force is transmitted to the steel wire rope 5 at the position of the first float 2, the torsional force can drive the steel wire rope 5 to rotate. Since the magnetic sleeve 42 is attracted to the steel wire rope 5, the rotation of the steel wire rope 5 is thus achieved. The magnetic sleeve 42 can be rotated, causing the baffle 421 to swing upward and move away from the end of the fixed shaft 431. At this time, since the cable body 1 is not supported by the float 2, it will sag on the seabed. Therefore, the center of gravity of the cable body 1 at the float 2 position will shift towards the sag cable body 1. After the baffle 421 loses its blocking effect, the lifting ring 31 can quickly slide off the fixed shaft 431, and the cable body 1 at the first float 2 position can fall to the seabed, and finally the separation of the float 2 and the cable body 1 can be completed.

[0043] As the wire rope 5 continues to rotate, the magnetic sleeve 42 at the first float 2 position cannot continue to rotate because the baffle 421 is against the clamping plate 44. When the torsional force is transmitted to the wire rope 5 at the next float 2 position, the wire rope 5 at the next float 2 position can rotate and drive the magnetic sleeve 42 to rotate, thereby causing the next float 2 to separate from the cable body 1. At this time, as the torsional force is continuously transmitted along the wire rope 5, multiple floats 2 can be separated from the cable body 1 one by one. Compared with the need for construction personnel to drive a small boat to remove the floats 2 one by one, it is more time-saving and labor-saving.

[0044] Meanwhile, since the wire rope 5 itself can be bent, it can be adapted to cable bodies 1 with different bending angles. Since the torsional force is transmitted gradually along the extension direction of the wire rope 5, compared with the steel rod, it will not cause multiple magnetic sleeves 42 to rotate at the same time after the steel rod is rotated. At this time, the center of gravity of the cable body 1 may not shift at the position of the float 2, so that the lifting ring 31 cannot slide off the fixed shaft 431.

[0045] It is precisely because of the gradual transmission of torsional force that the cable body 1 at the removed float 2 position will first fall into the seabed, and eventually the center of gravity of the cable body 1 at the next float 2 position will shift towards the previous float 2 position, so that the lifting ring 31 at the next float 2 position can easily and smoothly slide off the fixed shaft 431.

[0046] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A water-blocking type submarine cable, comprising a cable body (1), a plurality of floating packets (2) on the cable body (1), the cable body (1) comprising, from inside to outside, an optical fiber (11), a fiber paste (12), a stainless steel tube (13), an inner steel wire (14), a water-blocking glue (15), a copper tube (16), a polyethylene insulation (17), a corrugated steel strip (18), and a polyethylene sheath (19), characterized in that: The surface of the cable body (1) is provided with a plurality of polyethylene positioning rings (3) uniformly spaced along the extension direction of the cable body (1), a plurality of floating bags (2) correspond to the positions of the plurality of polyethylene positioning rings (3), respectively, the lower side of the floating bag (2) is provided with a fixed plate (4), both ends of the fixed plate (4) are provided with a fixed arm (41), the lower side of the two fixed arms (41) is provided with two fixed sleeves (411) with the same center axis and spaced distribution, a magnetic sleeve (42) is arranged between the two fixed sleeves (411), a steel wire rope (5) is arranged between the plurality of floating bags (2) and passes through the two fixed sleeves (411) and the magnetic sleeve (42) and is attracted in the magnetic sleeve (42), the lower side of the fixed sleeve (411) on one side is provided with a connecting arm (43) connected with the fixed sleeve (411) at the upper end, the lower end of the connecting arm (43) is provided with a fixed shaft (431), the upper side of the polyethylene positioning ring (3) is provided with a lifting ring (31) for the fixed shaft (431) to pass through, the end face of the fixed shaft (431) away from the connecting arm (43) is provided with a guide camber (4311) for the lifting ring (31) to fall off, the lower side of the magnetic sleeve (42) is provided with a baffle (421) used for abutting against the end of the fixed shaft (431) away from the connecting arm (43) after swinging downward, and a clamping plate (44) is arranged between the two fixed arms (41) and used for abutting against the baffle (421) swinging upward.

2. A water-blocking type submarine cable according to claim 1, characterized in that: The cross section of the fixed shaft (431) and the lifting ring (31) is circular.

3. A water-blocking type submarine cable according to claim 1, characterized in that: The circumferential side of the middle part of the polyethylene positioning ring (3) is provided with a steel ring (32) for welding the lifting ring (31).

4. A water-blocking type submarine cable according to claim 1, characterized in that: The gap width between the two fixed sleeves (411) is greater than the thickness of the magnetic sleeve (42).

5. A water-blocking type submarine cable according to claim 1, characterized in that: The inner diameter of the magnetic sleeve (42) is greater than the outer diameter of the cross section of the steel wire rope (5).

6. A water-blocking type submarine cable according to claim 1, characterized in that: The two sides of the lower surface of the floating bag (2) are provided with canvas strips (21), the two sides of the end of the canvas strip (21) away from the floating bag (2) are provided with through holes (211), the lower side of the fixed plate (4) is provided with a threaded shaft (45) passing through the through hole (211), and the threaded shaft (45) is threadedly connected with a locking nut (451).

7. A water-blocking type submarine cable according to claim 6, characterized in that: The end of the canvas strip (21) close to the floating bag (2) is provided with a reinforced bonding end (212) bonded to the surface of the floating bag (2).

8. A water-blocking type submarine cable according to claim 1, characterized in that: The outer wall of the polyethylene sheath (19) is further sprayed with a polyurea waterproof coating layer (6).

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