Floating fan dynamic submarine cable waveform maintaining system

Abstract

The invention provides a floating fan dynamic submarine cable waveform maintaining system which is characterized in that a floating fan is connected with a next fan on a current collection circuit through a dynamic submarine cable, at least two height-adjustable traction devices are arranged below the dynamic submarine cable, the upper ends of the traction devices are slidably connected with the dynamic submarine cable through buoyancy blocks, a buoyancy device is arranged between every two traction devices, and the buoyancy blocks are connected with the floating fan. Each buoyancy device comprises at least two buoyancy balls with an adjustable distance, the traction device and the buoyancy devices are arranged at intervals, and the double-wave line type of the dynamic submarine cable is maintained by adjusting the traction height and the wave band of the buoyancy cable. The problem that the double-wave line type of a dynamic submarine cable is easily influenced by marine organisms or extreme ocean motion is solved.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic submarine cables, and in particular to a waveform maintaining system for a floating wind turbine dynamic submarine cable. Background Art

[0002] Floating wind turbines are usually installed in deep waters, and the electricity generated is transmitted to the power grid on land through dynamic submarine cables. Since these cables are exposed to the marine environment for a long time, they may be affected by the attachment of marine organisms, such as barnacles, mussels and other invertebrates, which will increase the weight of the cable and change its line shape, which may cause wear or damage to the cable.

[0003] The main purpose of maintaining a double-wave shape for the dynamic submarine cable of a floating wind turbine is to optimize the mechanical and electrical properties of the cable while reducing the impact of the external environment on it. The double-wave shape is not designed to fix the submarine cable itself into a strict double-wave shape, but to allow the cable to form a relatively stable double-wave shape in its natural state under the influence of the marine environment. This double-wave shape design can disperse the tension and stress borne by the submarine cable, flexibly respond to changes in ocean movement, and reduce the friction between the submarine cable and the seabed or other objects by maintaining a certain degree of slack, thereby reducing the possibility of wear.

[0004] Therefore, it is urgent to design a device that can maintain the double wave line shape of the dynamic submarine cable of the floating wind turbine and resist the influence of marine life or extreme ocean movement. Summary of the invention

[0005] The main purpose of the present invention is to provide a floating wind turbine dynamic submarine cable waveform maintenance system to solve the problem that the double wave line type of the dynamic submarine cable is easily affected by marine organisms or extreme ocean movements.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a floating wind turbine dynamic submarine cable waveform maintaining system, the floating wind turbine is connected to the next wind turbine on the collector circuit through a dynamic submarine cable, at least two height-adjustable traction devices are arranged under the dynamic submarine cable, and the upper ends of the traction devices are slidably connected to the dynamic submarine cable through a buoyancy block, and a buoyancy device is arranged between every two traction devices, each buoyancy device includes at least two buoyancy balls with adjustable spacing, and the traction device and the buoyancy device are arranged at intervals so that the dynamic submarine cable has a double wave line shape.

[0007] In a preferred embodiment, the traction device comprises a buoyancy block, a mooring chain and a pile anchor, the pile anchor is fixed on the seabed, the upper end of the pile anchor is connected to one end of the mooring chain, and the other end of the mooring chain is connected to the buoyancy block, and the traction device stretches the dynamic submarine cable downward; An array type pressure sensor is arranged on the inner wall of the through hole in the middle of the buoyancy block.

[0008] In the preferred embodiment, the lower end of the pile anchor is fixed on the seabed, a hydraulic cylinder is provided at the bottom end of the pile anchor shell, the upper end of the hydraulic cylinder piston rod is connected to the lower end of the spring-damper device, the spring-damper device is sleeved in the telescopic shell, and the lower end of the telescopic shell extends into the upper end of the pile anchor shell.

[0009] In a preferred embodiment, the length of the telescopic housing is greater than the height of the spring-damping device and is compatible with the movable stroke of the hydraulic cylinder piston rod.

[0010] In a preferred embodiment, the upper end of the pile anchor housing is provided with a stepped surface, and the lower end of the telescopic housing is provided with a stepped ring, and the diameter of the stepped ring is larger than the diameter of the hole in the middle of the stepped surface; A sealing ring is also provided between the upper end of the pile anchor shell and the telescopic shell.

[0011] In a preferred embodiment, the mooring chain is connected to the buoyancy block and the upper end of the telescopic shell through a ball and socket joint.

[0012] In a preferred embodiment, the buoyancy ball is sleeved on the dynamic submarine cable through the middle through hole to stretch the dynamic submarine cable upward; The two ends of the buoyancy ball are respectively provided with an N magnetic pole and an S magnetic pole, and the same-direction magnetic poles of adjacent buoyancy balls are arranged opposite to each other.

[0013] In the preferred embodiment, two distance adjustment devices are symmetrically arranged in the buoyancy ball, and winding grooves are arranged opposite to each other on both sides of the buoyancy ball shell, and annular cavities are symmetrically arranged at both ends. The micro motor is arranged in the winding groove, and its output end is connected to the winding wheel. One end of the distance adjustment rope is fixedly connected to the winding wheel and is wound around the winding wheel for multiple turns, and then passes through the buoyancy ball shell and is wound around the annular cavity for multiple turns. The other end of the distance adjustment rope passes through the N magnetic pole or the S magnetic pole at one end of the buoyancy ball. A plurality of buoyancy balls are connected in series in pairs through adjustable distance ropes to form a buoyancy device.

[0014] In a preferred embodiment, the distance-adjusting rope is used to maintain the distance between adjacent buoyancy balls, and can restore the initial performance after being untangled; A sealing tube is also provided between the protruding end of the pitch-adjusting rope and the N magnetic pole or the S magnetic pole.

[0015] In a preferred embodiment, the array pressure sensor is electrically connected to the hydraulic cylinder and the micro motor.

[0016] The present invention provides a floating wind turbine dynamic submarine cable waveform maintenance system, wherein the floating wind turbine is connected to the next wind turbine on the collector circuit through a dynamic submarine cable, at least two traction devices are arranged below the dynamic submarine cable, and the upper end thereof is slidably connected to the dynamic submarine cable through a buoyancy block, a buoyancy device is arranged between every two traction devices, and each buoyancy device includes at least two buoyancy balls with adjustable spacing, and the dynamic submarine cable presents a double wave line through multiple groups of traction devices and buoyancy devices arranged at intervals, and the traction device can adjust the height of stretching the dynamic submarine cable downward, and the buoyancy device can adjust the curvature of the double wave line crest. The problem that the double wave line of the dynamic submarine cable is easily affected by marine organisms or extreme ocean movements is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an axonometric structural diagram of the traction device of the present invention; Figure 3 This is an axonometric structural diagram of the connection between the buoyancy block and the mooring chain of the present invention; Figure 4 This is a cross-sectional structural diagram of the connection between the buoyancy block and the mooring chain of the present invention; Figure 5 It is a schematic diagram of the inner wall of the buoyancy block of the present invention being unfolded; Figure 6 is a front cross-sectional view of the connection between the pile anchor and the mooring chain of the present invention; Figure 7 is a side sectional view of the connection between the pile anchor and the mooring chain of the present invention; Figure 8 This is a structural diagram of the connection between the buoyancy device and the dynamic submarine cable of the present invention; Fig. 9 This is an axonometric structural diagram of the buoyancy ball of the present invention; Fig.10 It is a cross-sectional structural diagram of the buoyancy ball of the present invention; Fig.11 It is a cross-sectional structural diagram of the buoyancy ball in the explosion mode of the present invention.

[0018] In the figure: floating wind turbine 1; dynamic submarine cable 2; traction device 3; buoyancy block 301; mooring chain 302; pile anchor 303; pile anchor housing 3031; hydraulic cylinder 3032; spring-damping device 3033; telescopic housing 3034; sealing ring 3035; buoyancy device 4; buoyancy ball 5; buoyancy ball shell 501; retracting groove 5011; annular cavity 5012; array pressure sensor 6; ball joint 7; N magnetic pole 8; S magnetic pole 9; pitch adjustment device 10; micro motor 1001; retracting wheel 1002; pitch adjustment rope 1003; sealing tube 11. DETAILED DESCRIPTION

[0019] Example 1 like Figures 1 to 11 As shown, a floating wind turbine dynamic submarine cable waveform maintaining system, a floating wind turbine 1 is connected to the next wind turbine on the collector circuit through a dynamic submarine cable 2, at least two height-adjustable traction devices 3 are arranged below the dynamic submarine cable 2, and the upper ends of the traction devices 3 are slidably connected to the dynamic submarine cable 2 through a buoyancy block 301, a buoyancy device 4 is arranged between every two traction devices 3, each buoyancy device 4 includes at least two buoyancy balls 5 with adjustable spacing, and the traction devices 3 and the buoyancy devices 4 are arranged at intervals, so that the dynamic submarine cable 2 is double-wave linear.

[0020] In a preferred embodiment, the traction device 3 includes a buoyancy block 301, a mooring chain 302 and a pile anchor 303. The pile anchor 303 is fixed on the seabed, and its upper end is connected to one end of the mooring chain 302. The other end of the mooring chain 302 is connected to the buoyancy block 301. The traction device 3 stretches the dynamic submarine cable 2 downward. An array type pressure sensor 6 is disposed on the inner wall of the through hole in the middle of the buoyancy block 301 .

[0021] The present application adopts a buoyancy device 4 with an adjustable height of a traction device 3 and an adjustable distance between a buoyancy ball 5, so that the traction device 3 can adjust the height of the dynamic submarine cable 2 stretched downward, and the buoyancy device 4 can adjust the curvature of the double-wave line wave crest, and can adjust the double-wave linearity of the dynamic submarine cable 2 in real time according to changes in the marine environment. The traction device 3 is slidably connected to the dynamic submarine cable 2, so that the dynamic submarine cable 2 can have a larger length margin to meet the offset requirements of the floating wind turbine 1.

[0022] In the preferred embodiment, the lower end of the pile anchor 303 is fixed on the seabed, a hydraulic cylinder 3032 is provided at the bottom end of the pile anchor housing 3031, the upper end of the piston rod of the hydraulic cylinder 3032 is connected to the lower end of the spring-damper device 3033, the spring-damper device 3033 is sleeved in the telescopic housing 3034, and the lower end of the telescopic housing 3034 extends into the upper end of the pile anchor housing 3031.

[0023] In a preferred embodiment, the length of the telescopic housing 3034 is greater than the height of the spring-damping device 3033 and is compatible with the movable stroke of the piston rod of the hydraulic cylinder 3032 .

[0024] In the preferred embodiment, the upper end of the pile anchor housing 3031 is provided with a stepped surface, and the lower end of the telescopic housing 3034 is provided with a stepped ring, and the diameter of the stepped ring is larger than the diameter of the hole in the middle of the stepped surface; A sealing ring 3035 is further provided between the upper end of the pile anchor housing 3031 and the telescopic housing 3034 .

[0025] In the preferred embodiment, the mooring chain 302 is connected to the buoyancy block 301 and the upper end of the telescopic shell 3034 through a ball joint 7.

[0026] The height-adjustable performance of the traction device 3 is mainly achieved through the internal structure of the pile anchor 303. After the hydraulic cylinder 3032 receives the height adjustment signal, its piston rod is extended and retracted inside the pile anchor housing 3031, thereby lifting the upper end spring-damping device 3033 and the telescopic housing 3034. The telescopic housing 3034 and the pile anchor housing 3031 are sealed by a sealing ring 3035. The length of the telescopic housing 3034 is such that when the hydraulic cylinder 3032 pushes the spring-damping device 3033 out of the upper end of the pile anchor housing 3031, it will not be exposed to the marine environment.

[0027] The spring-damping device 3033 reduces the tensile stress impact of the pile anchor 303 when subjected to a sudden tensile force from the mooring chain 302, and automatically retracts to the initial position after the sudden tensile force. Ball joints 7 are used at the hinges at both ends of the mooring chain 302, so that the hinged ends can move in all directions and can withstand a certain load, thereby preventing the mooring chain 302 from twisting off under the influence of the fluctuations of the dynamic submarine cable 2.

[0028] In the preferred embodiment, the buoyancy ball 5 is sleeved on the dynamic submarine cable 2 through the middle through hole to stretch the dynamic submarine cable 2 upward; The two ends of the buoyancy ball 5 are respectively provided with an N magnetic pole 8 and an S magnetic pole 9 , and the same-direction magnetic poles of adjacent buoyancy balls 5 are arranged opposite to each other.

[0029] In the preferred embodiment, two distance adjustment devices 10 are symmetrically arranged in the buoyancy ball 5, and reeling grooves 5011 are arranged opposite to each other on both sides of the buoyancy ball shell 501, and annular cavities 5012 are symmetrically arranged at both ends. The micro motor 1001 is arranged in the reeling groove 5011, and its output end is connected to the reeling wheel 1002. One end of the distance adjustment rope 1003 is fixedly connected to the reeling wheel 1002, and is wound around the reeling wheel 1002 for multiple turns, and then passes through the buoyancy ball shell 501, and is wound around the annular cavity 5012 for multiple turns. The other end of the distance adjustment rope 1003 passes through the N magnetic pole 8 or the S magnetic pole 9 at one end of the buoyancy ball 5; Multiple buoyancy balls 5 are connected in series in pairs through the distance adjustment rope 1003 to form a buoyancy device 4.

[0030] In the preferred embodiment, the distance-adjusting rope 1003 is used to maintain the distance between adjacent buoyancy balls 5, and can restore the initial performance after being untangled; A sealing tube 11 is also provided between the protruding end of the pitch rope 1003 and the N magnetic pole 8 or the S magnetic pole 9 .

[0031] The adjacent buoyancy balls 5 have oppositely arranged magnetic poles in the same direction, so that they produce a certain push-rejection effect when approaching each other, thereby preventing multiple buoyancy balls 5 from getting close to each other due to ocean current fluctuations and sticking together due to seawater erosion.

[0032] After the distance adjustment device 10 receives the distance adjustment signal, the micro motor 1001 drives the winding wheel 1002 to rotate, driving the distance adjustment rope 1003 to be wound around the winding wheel 1002 and the annular cavity 5012, shortening the length of the distance adjustment rope 1003 outside the buoyancy ball 5, thereby shortening the distance between the buoyancy balls 5; or the micro motor 1001 drives the winding wheel 1002 to rotate in the opposite direction, releasing a certain length of the distance adjustment rope 1003, thereby pushing the distance between the buoyancy balls 5 to the target distance, and the sealing tube 11 is used to prevent seawater from entering the buoyancy ball 5.

[0033] The spacing between the buoyancy balls 5 is shortened, and a concentrated section of the dynamic submarine cable 2 is precisely lifted, so that a higher and steeper waveform is generated at the crest of the dynamic submarine cable 2; the spacing between the buoyancy balls 5 is lengthened and distributed in a longer wave band of the dynamic submarine cable 2, so that the buoyancy points are dispersed, so that a shorter, higher and flatter waveform is generated at the crest of the dynamic submarine cable 2.

[0034] In a preferred embodiment, the array pressure sensor 6 is electrically connected to the hydraulic cylinder 3032 and the micro motor 1001 .

[0035] Before installing the system, the staff set up the dynamic submarine cable 2, traction device 3 and buoyancy device 4 based on experience, and measured the force of the dynamic submarine cable 2 on the buoyancy block 301 under the initial normal ocean environment through the array pressure sensor 6, and summarized and confirmed the "fluctuation allowable value" and "peak allowable value".

[0036] The "fluctuation tolerance value" is a regional value of the frequency of the up-down direction change of the force exerted by the dynamic submarine cable 2 on the buoyancy block 301; If the dynamic cable 2 is lower than the "permissible fluctuation value", that is, the frequency of the up-down direction change of the force exerted by the dynamic cable 2 on the buoyancy block 301 is too low, it is judged that the dynamic cable 2 cannot generate normal fluctuations due to the floating of marine organisms or being hooked by foreign objects, and a warning cleaning signal is sent to the staff; If it is higher than the "permissible fluctuation value", that is, the frequency of the up and down changes of the force of the dynamic submarine cable 2 on the buoyancy block 301 is too high, it is judged that the sea area where the dynamic submarine cable 2 is located has strong winds and waves, and a signal is sent to the hydraulic cylinder 3032 and the micro motor 1001 to adjust the waveform until the "permissible fluctuation value" is normal, or the dynamic submarine cable 2 is broken somewhere, resulting in no anchoring fluctuation at the end, and a warning inspection signal is sent to the staff.

[0037] The “peak allowable value” is a safe range of the peak value of the force exerted by the dynamic submarine cable 2 on the buoyancy block 301. Within this range, the dynamic submarine cable 2 and the traction device 3 have a relatively high fatigue life. Lower than the "peak allowable value", that is, the peak value of the force exerted by the dynamic submarine cable 2 on the buoyancy block 301 is continuously lower than the force value under the initial normal ocean environment. When this value is continuously lower than 50% of the "peak allowable value" within a unit monitoring time period, it is determined that the height setting of the traction device 3 is abnormal, and there is no effective traction effect on the dynamic submarine cable 2, and a signal is sent to the hydraulic cylinder 3032 to adjust the traction height; If it is higher than the "peak allowable value", that is, the peak value of the force exerted by the dynamic submarine cable 2 on the buoyancy block 301 is continuously higher than 50% of the "peak allowable value" within the unit monitoring time period, it is judged that the height setting of the traction device 3 is abnormal, the traction effect on the dynamic submarine cable 2 is excessive, and a signal is sent to the hydraulic cylinder 3032 to adjust the traction height; or if the sea area where the dynamic submarine cable 2 is located has strong winds and waves, a signal is sent to the hydraulic cylinder 3032 and the micro motor 1001 to adjust the waveform.

[0038] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A floating wind turbine dynamic submarine cable waveform maintenance system, characterized by: A floating wind turbine (1) is connected to the next wind turbine on a collection line via a dynamic submarine cable (2); at least two height-adjustable traction devices (3) are provided below the dynamic submarine cable (2); the upper ends of the traction devices (3) are slidably connected to the dynamic submarine cable (2) via a buoyancy block (301); a buoyancy device (4) is provided between every two traction devices (3); each buoyancy device (4) comprises at least two buoyancy balls (5) with adjustable spacing; the traction devices (3) and the buoyancy devices (4) are spaced apart, so that the dynamic submarine cable (2) is double-wave linear.

2. According to claim 1, a floating wind turbine dynamic submarine cable waveform maintenance system is characterized by: The traction device (3) comprises a buoyancy block (301), a mooring chain (302) and a pile anchor (303); the pile anchor (303) is fixed on the seabed, the upper end of the pile anchor is connected to one end of the mooring chain (302), and the other end of the mooring chain (302) is connected to the buoyancy block (301); the traction device (3) stretches the dynamic submarine cable (2) downward; An array-type pressure sensor (6) is provided on the inner wall of the middle through hole of the buoyancy block (301).

3. According to claim 2, a floating wind turbine dynamic submarine cable waveform maintenance system is characterized by: The lower end of the pile anchor (303) is fixed on the seabed, a hydraulic cylinder (3032) is provided at the bottom end of the pile anchor housing (3031), the upper end of the piston rod of the hydraulic cylinder (3032) is connected to the lower end of the spring-damping device (3033), the spring-damping device (3033) is sleeved in the telescopic housing (3034), and the lower end of the telescopic housing (3034) extends into the upper end of the pile anchor housing (3031).

4. According to claim 3, a floating wind turbine dynamic submarine cable waveform maintenance system is characterized by: The length of the telescopic housing (3034) is greater than the height of the spring-damping device (3033), and is compatible with the movable stroke of the piston rod of the hydraulic cylinder (3032).

5. According to claim 3, a floating wind turbine dynamic submarine cable waveform maintenance system is characterized by: The upper end of the pile anchor housing (3031) is provided with a stepped surface, and the lower end of the telescopic housing (3034) is provided with a stepped ring, the diameter of the stepped ring being greater than the diameter of the hole in the middle of the stepped surface; A sealing ring (3035) is also provided between the upper end of the pile anchor housing (3031) and the telescopic housing (3034).

6. According to claim 2, a floating wind turbine dynamic submarine cable waveform maintenance system is characterized by: The mooring chain (302) is connected to the buoyancy block (301) and the upper end of the telescopic shell (3034) via a ball and socket joint (7).

7. According to claim 1, a floating wind turbine dynamic submarine cable waveform maintenance system is characterized by: The buoyancy ball (5) is sleeved on the dynamic submarine cable (2) through the middle through hole, and stretches the dynamic submarine cable (2) upward; The two ends of the buoyancy ball (5) are respectively provided with an N magnetic pole (8) and an S magnetic pole (9), and the same-direction magnetic poles of adjacent buoyancy balls (5) are arranged opposite to each other.

8. According to claim 7, a floating wind turbine dynamic submarine cable waveform maintenance system is characterized by: Two distance adjustment devices (10) are symmetrically arranged in the buoyancy ball (5), reeling grooves (5011) are arranged opposite to each other on both sides of the buoyancy ball shell (501), and annular cavities (5012) are symmetrically arranged at both ends, a micro motor (1001) is arranged in the reeling groove (5011), and an output end of the micro motor (1001) is connected to the reeling wheel (1002), one end of the distance adjustment rope (1003) is fixedly connected to the reeling wheel (1002), and is wound around the reeling wheel (1002) for multiple turns, then passes through the buoyancy ball shell (501), and is wound around the annular cavity (5012) for multiple turns, and the other end of the distance adjustment rope (1003) passes through the N magnetic pole (8) or the S magnetic pole (9) at one end of the buoyancy ball (5); A plurality of buoyancy balls (5) are connected in series in pairs via pitch-adjusting ropes (1003) to form a buoyancy device (4).

9. A floating wind turbine dynamic submarine cable waveform maintenance system according to claim 8, characterized in that: The distance-adjusting rope (1003) is used to maintain the distance between adjacent buoyancy balls (5), and can restore the initial performance after being untangled; A sealing tube (11) is also provided between the extended end of the pitch-adjusting rope (1003) and the N magnetic pole (8) or the S magnetic pole (9).

10. The floating wind turbine dynamic submarine cable waveform maintenance system according to claim 1, characterized in that: The array pressure sensor (6) is electrically connected to the hydraulic cylinder (3032) and the micro motor (1001).

Images