Bottom fixing device and method for ocean thermal energy cold water pipe system

Abstract

The present invention discloses a bottom fixing device and method for a cold water pipe system of ocean thermal energy conversion. The device is used to be arranged on the ocean floor; the cold water pipe system of ocean thermal energy conversion includes a cold water pipe and an upper platform arranged on the sea surface. The device includes: a counterweight connected to the lower end of the cold water pipe; a buoyancy device, the buoyancy device is connected to the counterweight through a transmission mechanism, and the movement direction of the buoyancy device is opposite to the movement direction of the counterweight; a detection device for detecting the displacement change of the cold water pipe; a control device, the control device has an input end and an output end, the input end is electrically connected to the detection device, the output end is electrically connected to the buoyancy device, and the buoyancy device can adjust the buoyancy according to the displacement change of the cold water pipe detected by the detection device. The present invention can automatically adjust the cold water pipe to a vertically erected state.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean energy development operation equipment, and particularly relates to a bottom fixing device and method for a cold water pipe system of ocean thermal energy conversion. Background Art

[0002] As the global carbon emissions reach the peak in the past nearly 800,000 years, how to reduce global carbon emissions and control climate problems such as global warming has become a common problem faced by all mankind. As an important source of ocean renewable energy, the rational development of thermal energy conversion is of great significance for improving the energy structure, controlling climate change and solving environmental pollution problems. The main battlefield for the development of thermal energy conversion in China is located in the South China Sea. The development operation range of thermal energy conversion is large, the environmental conditions are harsh, and frequent typhoons / hurricanes will seriously affect the development operation of thermal energy conversion.

[0003] Under typhoon / hurricane conditions, the upper development platform of thermal energy conversion will have translational motion and vertical floating. This will cause the lower cold water pipe system not to maintain a vertical state. Seriously, it will cause the cold water pipe system to separate from the upper platform, resulting in major accidents and affecting the development operation of thermal energy conversion. In this context, a bottom fixing device for a cold water pipe system of ocean thermal energy conversion has been proposed in the prior art, so as to solve the problem that the cold water pipe system cannot maintain a vertical state under harsh conditions, increase the safety and stability of the cold water pipe system, improve the service life of the overall device and the utilization rate of cold seawater. When the upper platform moves, the bottom fixing device of the cold water pipe system can make corresponding responses according to the movement of the platform, so that the cold water pipe and the upper platform maintain a relatively safe and stable position.

[0004] The core components of the bottom fixing device of the cold water pipe system are buoyancy-adjustable floats and counterweights, and its working principle is as follows: by adjusting the buoyancy of the floats, the force exerted by the counterweights on the cold water pipe is changed, so as to keep the cold water pipe in a vertical state.

[0005] At present, there are two types of bottom fixing devices for the cold water pipe system. One is to suspend the counterweight 5 (as Figure 1 shown), and the suspended counterweight 5 does not directly contact the seabed 1; the second is to suspend the counterweight 5 and then moor it to the seabed 1 (as Figure 2 shown). In the first scheme, when the upper platform sways upward with the waves, the cold water pipe system is likely to cause the connection parts between the cold water pipes to break due to only suspending the counterweight 5. The second scheme is to suspend the counterweight 5 and moor it to the seabed 1. When the upper platform sways left and right with the waves, this scheme cannot keep the cold water pipe system in a vertical state. Summary of the Invention

[0006] To overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a bottom fixing device and method for an ocean thermal energy cold water pipe system, which can achieve a more secure and reliable fixation of the bottom of the cold water pipe system, and can automatically adjust the cold water pipe to a vertically erected state even under various complex and harsh working conditions.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A bottom fixing device for an ocean thermal energy cold water pipe system, the bottom fixing device for the ocean thermal energy cold water pipe system is used to be arranged on the ocean bottom; the ocean thermal energy cold water pipe system includes a cold water pipe and an upper platform arranged on the sea surface, and the bottom fixing device for the ocean thermal energy cold water pipe system includes: a counterweight connected to the lower end of the cold water pipe; a buoyancy device, the buoyancy device is connected to the counterweight through a transmission mechanism, and the movement direction of the buoyancy device is opposite to the movement direction of the counterweight; a detection device for detecting the displacement change of the cold water pipe; a control device, the control device has an input end and an output end, the input end is electrically connected to the detection device, the output end is electrically connected to the buoyancy device, and the buoyancy device can adjust the buoyancy according to the displacement change of the cold water pipe detected by the detection device.

[0009] In a preferred embodiment, the detection device includes: a movement detection member for detecting the up and down floating of the cold water pipe and an angle detection member for detecting the left and right floating of the cold water pipe.

[0010] In a preferred embodiment, the transmission mechanism includes: a steel wire rope connecting the counterweight and the buoyancy device, and a reel for driving and pulling the steel wire rope.

[0011] In a preferred embodiment, the counterweight and the buoyancy device are connected by the steel wire rope bypassing the reel. When the counterweight gradually moves up or down under the action of seawater pressure and the cold water pipe, the displacement distance of the buoyancy device moving down or up is equal to the displacement distance of the counterweight moving up or down.

[0012] In a preferred embodiment, it further includes a fixed bracket, the reel is installed on the fixed bracket, and the fixed bracket is connected to the seabed.

[0013] In a preferred embodiment, the angle detection member is arranged on the counterweight. When the angle detected by the angle detection member is greater than 5°, the control device starts the buoyancy device.

[0014] In a preferred embodiment, the buoyancy device includes: a variable cavity, an adjusting mechanism for adjusting the volume of the cavity, and a communication mechanism electrically connected to the control device.

[0015] In a preferred embodiment, the ocean thermal energy cold water pipe system further includes: a pulley block and a tensioning device provided on the upper platform; the tensioning device is connected to the upper end of the cold water pipe and can perform displacement compensation on the upper platform under the action of the pulley block.

[0016] A method for fixing the bottom of an ocean thermal energy cold water pipe system based on the above-mentioned bottom fixing device of the ocean thermal energy cold water pipe system, wherein the displacement threshold of the counterweight is stored in the control device, and the method includes:

[0017] Detect the displacement of the counterweight through a detection device;

[0018] When the detected displacement of the counterweight exceeds the displacement threshold, after receiving the displacement signal detected by the detection device, the control device controls the buoyancy device to start adjusting the buoyancy, and the counterweight moves under the drive of the buoyancy device;

[0019] When the detection device detects that the counterweight is reset within the displacement threshold again, the control device controls the buoyancy device to stop adjusting the buoyancy.

[0020] In a preferred embodiment, the displacement threshold includes a depth threshold and an angle threshold.

[0021] The technical solution of the present invention has the following remarkable beneficial effects:

[0022] The present application provides a bottom fixing device for an ocean thermal energy cold water pipe system. During use, a detection device can be used to detect the position of the cold water pipe in real time. When the control device determines that the cold water pipe needs to be adjusted, the control device controls the buoyancy of the buoyancy device to be adaptively adjusted, changing the position of the counterweight, so that the cold water pipe can always maintain a vertical state.

[0023] Referring to the following description and the drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited thereby in scope. Within the spirit and terms of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. Features described and / or illustrated for one embodiment can be used in the same or similar way in one or more other embodiments, combined with the features in other embodiments, or replace the features in other embodiments. Description of the Drawings

[0024] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically defining the shapes and proportional dimensions of the components of the present invention. Those skilled in the art can, under the teachings of the present invention, select various possible shapes and proportional dimensions according to specific circumstances to implement the present invention.

[0025] Figure 1 FIG. 5 is a schematic structural diagram of a bottom fixing device of a cold water pipe system for ocean thermal energy conversion in the prior art;

[0026] Figure 2 FIG. 6 is a schematic structural diagram of another bottom fixing device of a cold water pipe system for ocean thermal energy conversion in the prior art;

[0027] Figure 3 FIG. 7 is a schematic structural diagram of a bottom fixing device of a cold water pipe system for ocean thermal energy conversion proposed in an embodiment of the present invention;

[0028] Figure 4 is Figure 3 a partial enlarged view of the bottom fixing device of the cold water pipe system for ocean thermal energy conversion in FIG.

[0029] Reference numerals of the above accompanying drawings:

[0030] 1, seabed; 2, fixing bracket; 3, drum; 4, steel wire rope; 5, counterweight; 6, buoy device; 7, cold water pipe; 8, mooring cable; 9, tensioning device; 10, upper platform; 11, detection device; 12, control device; 13, pulley block. Detailed Embodiment

[0031] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent modifications made by those skilled in the art fall within the scope defined by the appended claims of this application.

[0032] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] The bottom fixing device of the ocean thermal energy cold water pipe system is used to be arranged on the ocean floor. The ocean thermal energy cold water pipe system includes a cold water pipe and an upper platform arranged on the sea surface. The bottom fixing device of the ocean thermal energy cold water pipe system is used to fix the bottom of the cold water pipe so that it can maintain a vertically erected state even under various complex and harsh working conditions.

[0035] The bottom fixing device of the ocean thermal energy cold water pipe system may include: a counterweight connected to the lower end of the cold water pipe; a buoyancy device, the buoyancy device is connected to the counterweight through a transmission mechanism, and the movement direction of the buoyancy device is opposite to that of the counterweight; a detection device for detecting the displacement change of the cold water pipe; a control device, the control device has an input end and an output end, the input end is electrically connected to the detection device, and the output end is electrically connected to the buoyancy device, and the buoyancy device can adjust the buoyancy according to the displacement change of the cold water pipe detected by the detection device.

[0036] The bottom fixing device of the ocean thermal energy cold water pipe system and its specific working process will be described in detail below in combination with specific drawings and embodiments.

[0037] Please refer to comprehensively Figures 3 to 4 , in the embodiments of the specification of this application, a bottom fixing device of an ocean thermal energy cold water pipe system may include: a fixing bracket 2, a winding drum 3, a steel wire rope 4, a buoyancy device 6, a counterweight 5, a detection device 11, a control device 12, etc.

[0038] The ocean thermal energy cold water pipe system may include: a pulley block 13 and a tensioning device 9 arranged on the upper platform 10. The tensioning device 9 is connected to the upper end of the cold water pipe 7 and can perform displacement compensation on the upper platform 10 under the action of the pulley block 13.

[0039] In this embodiment, the detection device 11 includes: a moving detection member for detecting the up and down floating of the cold water pipe 7 and an angle detection member for detecting the left and right floating of the cold water pipe 7.

[0040] The mobile detection member is mainly used to detect the depth distance required to be compensated by the counterweight 5. The angle detection member is mainly used to detect the angle required to be compensated by the counterweight 5. Specifically, the angle detection member is arranged on the counterweight 5, and when the angle detected by the angle detection member is greater than 5°, the control device 12 starts the float device 6. Of course, the setting of the angle threshold is not limited to the above 5°, and it can be adaptively adjusted according to different requirements such as the use environment and accuracy. The mobile detection member can be arranged on the counterweight 5, and of course it can also be arranged at any position that moves synchronously with the counterweight 5, such as the upper platform 10, the cold water pipe 7, etc. Specifically, the specific position of the mobile detection member is not limited in this application.

[0041] In this embodiment, the lower end of the cold water pipe 7 can be detachably matched with the counterweight 5. When the lower end of the cold water pipe 7 is detachably matched with the counterweight 5, the detachable manner can be a flange connection. Of course, the detachable manner can also be other manners, which are not specifically limited in this application.

[0042] In this embodiment, the transmission mechanism may include: a steel rope 4 connecting the counterweight 5 and the buoy device 6, and a drum 3 for driving and pulling the steel rope 4. The movement direction of the buoy device 6 is opposite to the movement direction of the counterweight 5. Specifically, the counterweight 5 and the buoy device 6 are connected by the steel rope 4 bypassing the drum 3, and when the counterweight 5 gradually moves upward or downward under the action of the seawater pressure and the cold water pipe 7, the distance of the downward or upward displacement of the buoy device 6 is equal to the distance of the upward or downward displacement of the counterweight 5.

[0043] The buoy device 6 includes: a variable cavity, an adjustment mechanism for adjusting the volume of the cavity, and a communication mechanism electrically connected to the control device 12 .

[0044] For example, the float device 6 can be a telescopic buoyancy regulating float, which can include a float body, a telescopic device, a power device, and a bladder. The telescopic device includes a fixed frame, a movable frame and a guide rail, the fixed frame is connected to the guide rail, the movable frame is slidably arranged on the guide rail, the power device is transmission-connected to the movable frame, the power device can drive the movable frame to slide back and forth, the bladder is sleeved on the outside of the fixed frame and the movable frame, the bladder is made of elastic material, and the movable frame can change the volume of the bladder by sliding back and forth. When in use, the detection device 11 is used to detect the buoyancy required for the underwater equipment, the detection device 11 and the power device are connected to the control device 12, the guide rail and the power device are arranged on the float body, and the relative sliding direction of the guide rail and the movable frame is parallel to the axial direction of the float body.

[0045] In one embodiment, the bottom fixing device of the ocean thermal energy cold water pipe system may further include a fixing bracket 2, on which a reel 3 is installed, and the fixing bracket 2 is connected to the seabed 1.

[0046] In this embodiment, the reel 3 is installed on the fixing bracket 2. The fixing bracket 2 plays a role in fixing and supporting, and is connected to the seabed 1. The upper platform 10 can be moored to the seabed 1 by a mooring cable 8.

[0047] The specific working process of the bottom fixing device of the ocean thermal energy cold water pipe system provided in this specification is as follows:

[0048] When the upper platform 10 floats upward (downward), the tensioning device 9 compensates for the displacement of the upper platform 10 under the action of the pulley block 13, but there may be a certain error, causing the cold water pipe 7 to float upward (downward) a certain distance following the upper platform 10.

[0049] Previously, the acting forces of the counterweight 5 and the buoy device 6 on the cold water pipe 7 kept it in a vertically erected state. To keep the cold water pipe 7 in its original state, when the detection device 11 detects that the counterweight 5 needs to move upward (downward), the detection device 11 transmits a signal to the control device 12. The detection signal input end of the control device 12 receives this signal and converts it into a signal for a specific work (the specific work signal can be a signal to make the buoy device 6 start to work and change the buoyancy by changing its own volume); then the output end of the control device 12 transmits this signal to the buoy device 6; at this time, the buoy device 6 starts to adjust the buoyancy of the device to gradually decrease (increase), and the buoy device 6 will gradually move downward (upward) under the action of the seawater pressure; the counterweight 5 and the buoy device 6 are connected by a steel rope 4 that bypasses the reel 3. The role of the reel 3 is to drive and tow the steel rope 4. The reel 3 is installed on the fixing bracket 2, and the fixing bracket 2 is connected to the seabed 1; the counterweight 5 gradually moves upward (downward) under the action of the seawater pressure and the cold water pipe 7; the downward (upward) displacement distance of the buoy device 6 is equal to the upward (downward) displacement distance of the counterweight 5, which is transmitted through the steel rope 4 and the reel 3; when the detection device 11 detects that the counterweight 5 no longer needs to move upward (downward), at this time the detection device 11 stops transmitting the signal to the control device 12, and then the control device 12 transmits the signal to the buoy device 6, and the buoy device 6 stops adjusting the buoyancy; at this time, the steel rope 4 is tightened by the reel 3 so that the counterweight 5 and the buoy device 6 remain in this position without moving.

[0050] When the upper platform 10 undergoes left - right displacement, the cold water pipe 7 will tilt at a certain angle. At this time, the detection device 11 detects the signal and transmits it to the control device 12. The detection signal input end of the control device 12 receives this signal and converts it into a signal for a specific work. Then, the output end of the control device 12 transmits this signal to the buoy device 6. At this time, the buoy device 6 starts to adjust the buoyancy of the device, gradually reducing it. Under the action of the seawater pressure, the buoy device 6 will gradually move downward; the counterweight 5 will gradually move upward under the action of the seawater pressure and the cold water pipe 7; until the cold water pipe 7 returns to the vertical state again. When the detection device 11 detects that the counterweight 5 no longer needs to move upward, at this time, the detection device 11 stops transmitting the signal to the control device 12, and then the control device 12 transmits the signal to the buoy device 6, and the buoy device 6 stops adjusting the buoyancy. At this time, the winch 3 tightens the steel rope 4 to keep the counterweight 5 and the buoy device 6 in this position without moving.

[0051] The bottom fixing device of the ocean thermal energy cold water pipe system provided in the specification of the present invention has at least the following beneficial effects:

[0052] (1) The principle is simple, the structure is compact, and it is convenient for installation;

[0053] (2) The present invention effectively improves the fixing device of the prior art which cannot be adjusted according to the actual situation, and effectively solves the problem of maintaining the vertical state under various environmental conditions;

[0054] (3) The structure of the present invention is simple, there is no complex parts processing, it is easy to use, and the manufacturing cost is low; it makes the disassembly, maintenance and replacement of the bottom fixing device very convenient.

[0055] Based on the bottom fixing device of an ocean thermal energy cold water pipe system provided in the above - mentioned specification, the present specification also provides a bottom fixing method for an ocean thermal energy cold water pipe system. The control device 12 stores a displacement threshold for the counterweight 5, and the displacement threshold includes a depth threshold and an angle threshold. The bottom fixing method for the ocean thermal energy cold water pipe system may include the following steps:

[0056] Detect the displacement of the counterweight 5 through the detection device 11;

[0057] When the detected displacement of the counterweight 5 exceeds the displacement threshold, after the control device 12 receives the displacement signal detected by the detection device 11, it controls the buoy device 6 to start adjusting the buoyancy, and the counterweight 5 moves driven by the buoy device 6;

[0058] When the detection device 11 detects that the counterweight 5 is reset within the displacement threshold again, the control device 12 controls the buoy device 6 to stop adjusting the buoyancy.

[0059] In this embodiment, the displacement threshold can be adaptively designed according to the actual use environment, accuracy requirements, etc., and the present application does not make specific limitations here.

[0060] In this embodiment, based on the bottom fixing device of the ocean thermal energy cold water pipe system provided in this specification, the detection device 11 can be used to detect the position of the cold water pipe 7 in real time. When the control device 12 determines that the cold water pipe 7 needs to be adjusted, the control device 12 adaptively adjusts the buoyancy of the buoy device 6 to change the position of the counterweight 5, so that the cold water pipe 7 can always maintain a vertically erected state.

[0061] It should be noted that in the description of the present application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects, and there is no sequence between them, nor can they be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0062] The above-mentioned various embodiments in this specification are all described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0063] The above are only several embodiments of the present invention. Although the disclosed embodiments of the present invention are as above, the content is only an embodiment adopted for the convenience of understanding the present invention and is not used to limit the present invention. Any person skilled in the art in the technical field to which the present invention pertains, without departing from the spirit and scope disclosed by the present invention, makes any modifications in the form and details of the embodiments, but the patent protection scope of the present invention shall still be subject to the scope defined by the appended claims.

Claims

1. A bottom fixing device for an ocean thermal energy cold water pipe system, characterized in that, The bottom fixing device of the ocean thermal energy cold water pipe system is used to be arranged on the ocean floor; the ocean thermal energy cold water pipe system includes a cold water pipe and an upper platform arranged on the sea surface. The bottom fixing device of the ocean thermal energy cold water pipe system includes: A counterweight connected to the lower end of the cold water pipe; A buoyancy device, which is connected to the counterweight through a transmission mechanism, and the movement direction of the buoyancy device is opposite to that of the counterweight; The transmission mechanism includes: a steel wire rope connecting the counterweight and the buoyancy device, and a reel for driving and pulling the steel wire rope; the counterweight and the buoyancy device are connected by the steel wire rope bypassing the reel. When the counterweight gradually moves up or down under the action of seawater pressure and the cold water pipe, the displacement distance of the buoyancy device moving down or up is equal to the displacement distance of the counterweight moving up or down; A fixed bracket, on which the reel is installed, and the fixed bracket is connected to the seabed; A detection device for detecting the displacement change of the cold water pipe; the detection device includes: a moving detection part for detecting the up and down floating of the cold water pipe and an angle detection part for detecting the left and right floating of the cold water pipe; A control device, which has an input end and an output end. The input end is electrically connected to the detection device, and the output end is electrically connected to the buoyancy device. The buoyancy device can adjust the buoyancy according to the displacement change of the cold water pipe detected by the detection device; The buoyancy device includes: a variable cavity, an adjustment mechanism for adjusting the volume of the cavity, and a communication mechanism electrically connected to the control device; The ocean thermal energy cold water pipe system further includes: a pulley block and a tensioning device arranged on the upper platform; the tensioning device is connected to the upper end of the cold water pipe and can perform displacement compensation on the upper platform under the action of the pulley block; When the upper platform floats up or down, the tensioning device performs displacement compensation on the upper platform under the action of the pulley block, so that the cold water pipe follows the upper platform and floats up or down a certain distance; To keep the cold water pipe in its original state, when the detection device detects that the counterweight needs to move up or down, the detection device transmits a signal to the control device. The detection signal input end of the control device receives this signal and converts it into a signal for a specific work. This specific work signal is to make the buoy device start to work, so that the buoy changes its buoyancy by changing its own volume; then the output end of the control device transmits this signal to the buoy device; the buoy device starts to adjust the buoyancy of the device, making it gradually decrease or increase. Under the action of seawater pressure, the buoy device will gradually move down or up; the counterweight will gradually move up or down under the action of seawater pressure and the cold water pipe; the distance of the downward or upward displacement of the buoy device is equal to the distance of the upward or downward displacement of the counterweight; when the detection device detects that the counterweight no longer needs to move up or down, the detection device stops transmitting the signal to the control device, and then the control device transmits the signal to the buoy device, and the buoy device stops adjusting the buoyancy; at this time, the winch tightens the steel cable to keep the counterweight and the buoy device in this position without moving. When the upper platform generates left and right displacements, the cold water pipe will tilt at a certain angle; at this time, the detection device detects the signal and transmits the signal to the control device. The detection signal input end of the control device receives this signal and converts it into a signal for a specific work, and then the output end of the control device transmits this signal to the buoy device; the buoy device starts to adjust the buoyancy of the device, making it gradually decrease. Under the action of seawater pressure, the buoy device will gradually move down; the counterweight will gradually move up under the action of seawater pressure and the cold water pipe; until the cold water pipe returns to the vertical state again, when the detection device detects that the counterweight no longer needs to move up, at this time the detection device stops transmitting the signal to the control device, and then the control device transmits the signal to the buoy device, and the buoy device stops adjusting the buoyancy. At this time, the winch tightens the steel cable to keep the counterweight and the buoy device in this position without moving.

2. The bottom fixing device for an ocean thermal energy cold water pipe system according to claim 1, characterized in that, The angle detection member is arranged on the counterweight. When the angle detected by the angle detection member is greater than 5°, the control device starts the buoy device.

3. A bottom fixing method for an ocean thermal energy cold water pipe system based on the bottom fixing device for an ocean thermal energy cold water pipe system according to claim 1, characterized in that, The displacement threshold of the counterweight is stored in the control device. The method includes: Detecting the displacement of the counterweight through a detection device; When the detected displacement of the counterweight exceeds the displacement threshold, after the control device receives the displacement signal detected by the detection device, it controls the buoy device to start adjusting the buoyancy, and the counterweight moves under the drive of the buoy device; When the detection device detects that the counterweight resets within the displacement threshold, the control device controls the buoy device to stop adjusting the buoyancy.

4. The bottom fixing method for an ocean thermal energy cold water pipe system according to claim 3, characterized in that, The displacement threshold includes a depth threshold and an angle threshold.

Images