Load pressing, arranging and loading device of four-stand-column truss type tension leg floating type draught fan foundation platform

Abstract

The invention discloses a pressure and load arrangement device of a four-column truss type tension leg floating type fan foundation platform, the pressure and load arrangement device of the four-column truss type tension leg floating type fan foundation platform comprises a ship body assembly, a pressure loading assembly and a load arrangement assembly are arranged in the ship body assembly, and a stretching assembly is arranged on the ship body assembly. The end, away from the ship body assembly, of the stretching assembly is connected with the tension tendon, the end, away from the stretching assembly, of the tension tendon is connected with the seabed, the ballast assembly loads seawater into the ship body assembly, the stretching assembly lifts the tension tendon so that the ship body assembly can dive to the preset draft level, and the load discharging assembly discharges the seawater in the ship body assembly. The hull assembly floats upward to tension the tension tendon. According to the pressing, arranging and loading device of the four-stand-column truss type tension leg floating type draught fan foundation platform, modular design is adopted for all the assemblies, cost is reduced, the structure is simple, the maintenance difficulty is small, and the mooring installation requirement of the tension leg floating type draught fan foundation platform is met.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore wind power, and in particular relates to a compression load device of a four-column truss tension-leg floating wind turbine foundation platform. Background Art

[0002] With the deepening of offshore wind resource development, deep-sea floating wind power has gradually become a key area of ​​research and application. Deep-sea areas have abundant wind resources and higher stability, but they also face more complex sea conditions and deeper water depths. Traditional fixed-base wind power platforms face many technical and economic challenges in deep-sea environments, so floating wind power platforms have gradually become the mainstream choice.

[0003] At present, most floating wind power platforms are unmanned, and the ballast tanks are designed as permanent structures. After the initial ballasting, they usually do not need to be adjusted. However, in certain circumstances, such as when the tank is damaged or needs to be towed back to the dock, ballasting and unloading adjustments are still required. The ballast and unloading systems of existing floating platforms or floating production devices are usually more complex in design, high in cost and difficult to maintain, and are not suitable for large-scale wind farm applications. The ballast and unloading systems of conventional floating platforms will not be suitable for the needs of tension leg floating wind power platforms and large-scale wind farms.

[0004] Therefore, it is urgent to design a tension leg floating wind turbine foundation platform compression load device to solve the above-mentioned problems of the existing technology being complex in structure, high in cost, difficult, and not suitable for large-scale wind farm applications. Summary of the invention

[0005] In order to solve the technical problems mentioned in the background technology that the existing technology is complex in structure, high in cost, difficult to apply and is not suitable for large-scale wind farm applications, a four-column truss tension leg floating wind turbine foundation platform compression load device is provided to solve the above problems.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the pressure-discharging device of the four-column truss tension-leg floating wind turbine foundation platform of the present invention is as follows: A ballast and load-discharging device for a four-column truss tension-leg floating wind turbine foundation platform comprises a hull assembly, wherein a ballast assembly and a load-discharging assembly are arranged in the hull assembly, a tension assembly is arranged on the hull assembly, one end of the tension assembly away from the hull assembly is connected to a tension tendon, and one end of the tension tendon away from the tension assembly is connected to the seabed, the ballast assembly loads seawater into the hull assembly, the tension assembly pulls the tension tendon to make the hull assembly dive to a predetermined draft, the load-discharging assembly discharges the seawater in the hull assembly, and the hull assembly floats to tighten the tension tendon.

[0007] Furthermore, the hull assembly includes a horizontally arranged central pontoon and multiple side pontoons, the multiple side pontoons are arranged around the outer periphery of the central pontoon, the central pontoon and the multiple side pontoons are connected by a first cross brace, and adjacent side pontoons are connected by a second cross brace. A riser is vertically arranged on the central pontoon, a deck is arranged at one end of the riser away from the central pontoon, and the deck and the multiple side pontoons are connected by a connecting pipe.

[0008] Furthermore, the tensioning assembly includes multiple groups of jacks, which are arranged on the deck. Each group of jacks is arranged in one-to-one correspondence with the side buoys. The jacks are connected with steel strands, and the side buoys are provided with cable guide holes. The steel strands pass through the cable guide holes to connect with the tension tendons. The end of the tension tendons away from the steel strands is connected to the seabed.

[0009] Furthermore, the ballast assembly includes a ballast pipeline, one end of which is arranged in the external seawater, and the other end of the ballast pipeline is respectively connected to the central buoy and the side buoy. The external seawater is injected into the central buoy and the side buoy through the ballast pipeline to make the hull assembly dive to a predetermined draft level.

[0010] Furthermore, the ballast pipeline includes a main ballast pipeline, a first branch and a second branch. One end of the main ballast pipeline is connected to a ballast pump, and the ballast pump is placed in the external seawater. The other end of the main ballast pipeline passes through the riser to be connected to the first branch, and the first branch is arranged in the central buoy. The other end of the main ballast pipeline also passes through the riser and the first cross brace to be connected to the second branch, and the second branch is arranged in the side buoy.

[0011] Furthermore, the load-discharging assembly includes a load-discharging pipeline, one end of which passes through the deck to the outside of the hull, and the other end is respectively connected to the central buoy and the side buoy. The seawater in the central buoy and the side buoy is discharged through the load-discharging pipeline, and the hull floats to tighten the tension tendon.

[0012] Furthermore, the load-carrying pipeline includes a main load-carrying pipeline, a third branch and a fourth branch. One end of the main load-carrying pipeline passes through the deck to the outside of the hull, and the other end of the main load-carrying pipeline passes through the riser to be connected with the third branch. The third branch is arranged in the central buoy. The other end of the main load-carrying pipeline also passes through the riser and the first cross brace to be connected with the fourth branch. The fourth branch is arranged in the side buoy.

[0013] Furthermore, it also includes an electric submersible pump and a load-discharging pump. The electric submersible pump is arranged in the central buoy and connected to the third branch. The load-discharging pump is arranged in the side buoy and connected to the fourth branch.

[0014] Furthermore, it also includes a jet pump, which is arranged in the side buoy and is connected to the main ballast pipeline and the main load-discharging pipeline respectively.

[0015] Furthermore, it also includes multiple electro-hydraulic remote control valves, and the first branch, the second branch, the third branch and the fourth branch are each provided with an electro-hydraulic remote control valve to control the on and off of the first branch, the second branch, the third branch and the fourth branch.

[0016] The four-column truss tension-leg floating wind turbine foundation platform of the present invention has the following advantages: A ballast assembly and a load-discharging assembly are arranged in the hull assembly, a tension assembly is arranged on the hull assembly, one end of the tension assembly away from the hull assembly is connected to the tension tendon, the ballast assembly loads seawater into the hull assembly, the tension assembly pulls to make the hull assembly dive to a predetermined draft, the load-discharging assembly discharges the seawater in the hull assembly, and the hull floats to tighten the tension tendon. Each component of the ballast-discharging device adopts a modular design, which is convenient for mass production and installation, reduces costs, has a simple structure, and is easy to maintain, and can meet the mooring installation requirements of the tension-leg floating wind turbine foundation platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the compression load device of the four-column truss type tension leg floating wind turbine foundation platform of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the compression load device of the four-column truss type tension leg floating wind turbine foundation platform of the present invention.

[0018] Description of the markings in the figure: 1. Hull assembly; 11. Deck; 111. Discharge port; 12. Center buoy; 121. First compartment; 13. Side buoy; 131. Middle compartment; 132. Second compartment; 133. Third compartment; 134. Fairlead hole; 14. Riser; 15. First cross brace; 16. Second cross brace; 17. Connecting pipe; 2. Ballast assembly; 21. Ballast pipeline; 211. Main ballast pipeline; 212. First branch; 213. Second branch; 22. Ballast pump; 3. Load discharge assembly; 31. Load discharge pipeline; 311. Main load discharge pipeline; 312. Third branch; 313. Fourth branch; 32. Submersible pump; 33. Load discharge pump; 34. Jet pump; 4. Tension assembly; 41. Jack; 42. Steel strand; 43. Tension tendon; 5. Electro-hydraulic remote control valve; 6. Hand chain hoist. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Figure 2 The present invention describes a compression load arrangement of a four-column truss tension-leg floating wind turbine foundation platform.

[0022] like Figure 1 and Figure 2 As shown, the ballast and load-discharging device of the four-column truss tension-leg floating wind turbine foundation platform in the present invention comprises a hull assembly 1, a ballast assembly 2 and a load-discharging assembly 3 are arranged in the hull assembly 1, a tension assembly 4 is arranged on the hull assembly 1, one end of the tension assembly 4 away from the hull assembly 1 is connected to a tension tendon 43, and one end of the tension tendon 43 away from the tension assembly 4 is connected to the seabed, the ballast assembly 2 loads seawater into the hull assembly 1, the tension assembly 4 is pulled to make the hull assembly 1 dive to a predetermined draft, the load-discharging assembly 3 discharges the seawater in the hull assembly 1, and the hull assembly 1 floats to tighten the tension tendon 43.

[0023] A ballast component 2 and a load-discharging component 3 are arranged in the hull component 1, a tension component 4 is arranged on the hull component 1, and one end of the tension component 4 away from the hull component 1 is connected to the tension tendon 43. The ballast component 2 loads seawater into the hull component 1, and the tension component 4 pulls to make the hull component 1 dive to a predetermined draft. The load-discharging component 3 discharges the seawater in the hull component 1, and the hull component 1 floats to tighten the tension tendon 43. The various components of the ballast and load-discharging device adopt a modular design, which is convenient for mass production and installation, reduces costs, has a simple structure, and is easy to maintain, and can meet the mooring installation requirements of the tension-leg floating wind turbine foundation platform.

[0024] Further, if Figure 1 and Figure 2As shown, the hull assembly 1 includes a horizontally arranged central buoy 12 and a plurality of side buoys 13, the plurality of side buoys 13 are arranged around the outer periphery of the central buoy 12, the central buoy 12 and the plurality of side buoys 13 are connected by a first cross brace 15, and the adjacent side buoys 13 are connected by a second cross brace 16, a riser 14 is vertically arranged on the central buoy 12, a deck 11 is arranged at one end of the riser 14 away from the central buoy 12, and the deck 11 and the plurality of side buoys 13 are connected by a connecting pipe 17. The central buoy 12 and the side buoys 13 are connected by the first cross brace 15, the central buoy 12 and the deck 11 are connected by the riser 14, the side buoys 13 and the riser 14 are connected by the connecting pipe 17, and the side buoys 13 are connected by the second cross brace 16, and the deck 11, the central buoy 12 and the side buoys 13 are connected as a whole by arranging the riser 14, the first cross brace 15, the second cross brace 16 and the connecting pipe 17, thereby enhancing the overall stability. In this embodiment, three side buoys 13 are provided. In other embodiments, the number of side buoys 13 and ballast tanks can be set according to actual conditions.

[0025] Further, if Figure 1 and Figure 2 As shown, the tensioning assembly 4 includes a plurality of groups of jacks 41, and the plurality of groups of jacks 41 are arranged on the deck 11. The jacks 41 and the side buoys 13 are arranged one by one. The jacks 41 are connected with steel strands 42, and the side buoys 13 are provided with cable guide holes 134. The steel strands 42 pass through the cable guide holes 134 to connect with the tension tendons 43, and the end of the tension tendons 43 away from the steel strands 42 is connected to the seabed. By setting the jacks 41, when the jacks 41 are extended, the tension tendons 43 will be tightened through the steel strands 42, so that the hull assembly 1 dives to the specified position. In this embodiment, in order to enhance the force applied to the hull assembly 1, a total of 9 jacks 41 are provided, and each jack 41 is connected to the tension tendon 43 through the steel strands 42, and every 3 jacks 41 correspond to one side buoy 13.

[0026] In order to further adjust the diving depth of the hull assembly 1, it can also be adjusted with the help of seawater. A ballast assembly 2 and a load-discharging assembly 3 are arranged in the hull assembly 1. The ballast assembly 2 loads seawater into the hull assembly 1, and the weight of the hull assembly 1 becomes heavier. At the same time, the tension assembly 4 pulls to make the hull assembly 1 dive to a predetermined draft. The load-discharging assembly 3 discharges the seawater in the hull assembly 1, and the weight of the hull assembly 1 becomes lighter. The tension tendon 43 continues to be tightened to make the hull meet the mooring installation requirements. Under the joint action of the ballast assembly 2, the load-discharging assembly 3 and the tension assembly 4, the installation operation of the hull assembly 1 is realized.

[0027] Further, if Figure 1 and Figure 2As shown, the ballast assembly 2 includes a ballast pipeline 21, one end of which is arranged in the external seawater, and the other end of the ballast pipeline 21 is respectively connected to the central buoy 12 and the side buoy 13. The external seawater is injected into the central buoy 12 and the side buoy 13 through the ballast pipeline 21 to make the hull assembly 1 heavier and dive to a predetermined draft. Specifically, the ballast pipeline 21 includes a main ballast pipeline 211, a first branch 212 and a second branch 213. One end of the main ballast pipeline 211 is connected to a ballast pump 22, and the ballast pump 22 is placed in external seawater. The main ballast pipeline 211 is passed through a riser 14 and is wound around the deck 11, and then extends from the deck 11 to be connected to the ballast pump 22. The other end of the main ballast pipeline 211 passes through the riser 14 to be connected to the first branch 212, and the first branch 212 is arranged in the central buoy 12. The other end of the main ballast pipeline 211 also passes through the riser 14 and the first cross brace 15 to be connected to the second branch 213, and the second branch 213 is arranged in the side buoy 13.

[0028] Further, if Figure 1 and Figure 2 As shown, the load discharging assembly 3 includes a load discharging pipeline 31, one end of which leads to the outside of the hull assembly 1, and the other end is respectively connected to the central buoy 12 and the side buoy 13. The seawater in the central buoy 12 and the side buoy 13 is discharged through the load discharging pipeline 31 to lighten the weight of the hull assembly 1 and keep the tension tendon 43 in tension. Specifically, the load discharging pipeline 31 includes a main load discharging pipeline 311, a third branch 312 and a fourth branch 313. One end of the main load discharging pipeline 311 passes through the deck 11 to the outside of the hull assembly 1, and the other end of the main load discharging pipeline 311 passes through the riser 14 and is connected to the third branch 312. The third branch 312 is arranged in the central buoy 12. The other end of the main load discharging pipeline 311 also passes through the riser 14 and the first cross brace 15 to be connected to the fourth branch 313. The fourth branch 313 is arranged in the side buoy 13. The load-discharging device of the four-column truss tension-leg floating wind turbine foundation platform in the present invention also includes an electric submersible pump 32 and a load-discharging pump 33. The electric submersible pump 32 is arranged in the central buoy 12, and the electric submersible pump 32 is connected to the third branch 312. The load-discharging pump 33 is arranged in the side buoy 13, and the load-discharging pump 33 is connected to the fourth branch 313.

[0029] When the hull assembly 1 needs to be submerged, the jack 41 tightens the steel strand 42 so that the tension tendon 43 is tightened, causing the hull assembly 1 to dive to the specified position. At the same time, the ballast pump 22 pumps seawater into the central buoy 12 and the side buoys 13, making the weight of the hull assembly 1 heavier, making it easier for the hull assembly 1 to dive to the specified position; when it is necessary to continue to tension the tension tendon 43 to achieve the predetermined tension required for mooring, the discharge pump 33 continuously extracts the seawater stored in the side buoy 13, and the electric submersible pump 32 continuously extracts the seawater stored in the center buoy 12, and discharges the seawater in the side buoys 13 and the center buoy 12 from the hull assembly 1 through the main discharge pipeline 311, thereby reducing the weight of the hull assembly 1 and making it easier for the hull assembly 1 to float to the specified position.

[0030] Further, if Figure 1 and Figure 2 As shown, the pressure-discharging device of the four-column truss tension-leg floating wind turbine foundation platform in the present invention also includes a jet pump 34, which is arranged in the side buoy 13, and the jet pump 34 is respectively connected to the main ballast pipeline 211 and the main discharge pipeline 311. Specifically, the inlet of the jet pump 34 is connected to the main ballast pipeline 211, and the outlet of the jet pump 34 is connected to the main discharge pipeline 311. When discharging the seawater in the side buoy 13 to the outside of the hull assembly 1, when the liquid level in the side buoy 13 is a high level, the discharge pump 33 is used to pump and discharge, and when the liquid level in the side buoy 13 is a low level, the jet pump 34 is used to pump and discharge. When using the jet pump 34, first open the inlet of the jet pump 34, discharge the seawater in the main ballast pipeline 211 into the jet pump 34, inject driving water into the jet pump 34, so that the jet pump 34 can be started, and after the jet pump 34 is started, close the inlet of the jet pump 34, open the outlet of the jet pump 34, start the jet pump 34 to perform low liquid level discharge operation, and discharge the seawater in the side buoy 13. In addition, the jet pump 34 can also be used as a backup pump when the discharge pump 33 fails.

[0031] Further, if Figure 1 and Figure 2 As shown, the compression load device of the four-column truss tension leg floating wind turbine foundation platform in the present invention also includes a plurality of electro-hydraulic remote-controlled valves 5, and the first branch 212, the second branch 213, the third branch 312 and the fourth branch 313 are all provided with electro-hydraulic remote-controlled valves 5 to control the opening and closing of the first branch 212, the second branch 213, the third branch 312 and the fourth branch 313.

[0032] Further, if Figure 1 and Figure 2As shown, a first cabin 121 is provided in the central buoy 12, a first branch 212, a third branch 312 and an electric submersible pump 32 are all provided in the first cabin 121, and seawater is stored in the first cabin 121 or discharged from the first cabin 121. A middle cabin 131, a second cabin 132 and a third cabin 133 are provided in the side buoy 13, the middle cabin 131 is provided at the center of the side buoy 13, the second cabin 132 and the third cabin 133 are provided on both sides of the middle cabin 131, respectively, the second cabin 132 and the third cabin 133 have the same structure and function, and multiple second cabins 132 and third cabins 133 can also be provided around the empty cabin, and the multiple second cabins 132 and third cabins 133 have the same structure and function, so as to realize a larger space for storing seawater and increase the weight of the hull assembly 1. The discharge pump 33 and the jet pump 34 are both arranged in the middle cabin 131, and the main ballast pipeline 211 and the main discharge pipeline 311 are both extended into the middle cabin 131. The second branch 213 includes two, one end of the two second branches 213 are connected to the main ballast pipeline 211 in the middle cabin 131, and the other end is respectively connected to the second cabin 132 and the third cabin 133, so as to facilitate the extraction of seawater into the second cabin 132 and the third cabin 133. The fourth branch 313 includes three, one end of the three fourth branches 313 are connected to the main discharge pipeline 311 in the middle cabin 131, and the other end is respectively connected to the middle cabin 131, the second cabin 132 and the third cabin 133, so as to facilitate the discharge of seawater in the middle cabin 131, the second cabin 132 and the third cabin 133 from the side buoy 13. In this embodiment, the second branch 213 and the fourth branch 313 connected in the second compartment 132 and the third compartment 133 can be combined into one pipeline, and the seawater is stored and discharged through the switch valve arranged on the pipeline.

[0033] Further, if Figure 1 and Figure 2 As shown, the ballast discharge device of the four-column truss tension leg floating wind turbine foundation platform in the present invention also includes a hand chain hoist 6, which is connected to the ballast pump 22. After the ballast discharge operation is completed, the ballast pump 22 is lifted up on the deck 11 by the hand chain hoist 6, and the jack 41 is removed at the same time, so as to be used for the ballast discharge operation of the next floating wind power foundation platform of the floating wind farm.

[0034] The working principle of the pressure-discharging device of the four-column truss tension-leg floating wind turbine foundation platform of the present invention is as follows: The steps of ballasting operation are as follows: After the ballast pump 22 is installed in place, it is turned on to pump seawater into the main ballast pipeline 211, and firstly injected into the first compartment 121 of the central buoy 12 through the riser 14 and the first branch 212. The seawater is then injected into the second compartment 132 and the third compartment 133 of each side buoy 13 through the main ballast pipeline 211 and the second branch 213. When the ballast pump 22 is turned on, the jack 41 is started, and the tension tendon 43 is pulled through the steel strand 42. The two simultaneously act on the floating foundation platform, so that the hull assembly 1 dives to the predetermined position and meets the tension demand of the tension tendon 43.

[0035] The steps for unloading are as follows: When the unloading operation is started, the ballast water is at a high level. The unloading pump 33 and the electric submersible pump 32 are first used to unload the ballast water. The seawater in the second and third compartments 132 and 133 is discharged to the sea through the fourth branch 313 and the main unloading pipeline 311, and the seawater in the first compartment 121 is discharged to the sea through the discharge port 111 on the deck 11 through the third branch 312 and the main unloading pipeline 311. When the middle compartment 131 is at a low level, the ballast pump 22 is started to inject driving water into the jet pump 34, and then the jet pump 34 is started to unload the ballast water at a low level. In addition, the jet pump 34 can also be used as a backup pump when the unloading pump 33 fails.

[0036] After the ballast operation is completed, the ballast pump 22 is lifted by a hand chain hoist, and the jack 41 is removed at the same time, so as to be used for the ballast operation of the next tension leg floating wind power platform of the floating wind farm.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A four-column truss tension leg floating wind turbine foundation platform pressure discharge device, characterized in that: The invention comprises a hull assembly, wherein a ballast assembly and a load-discharging assembly are arranged in the hull assembly, a tension assembly is arranged on the hull assembly, an end of the tension assembly away from the hull assembly is connected to a tension tendon, and an end of the tension tendon away from the tension assembly is connected to the seabed, the ballast assembly loads seawater into the hull assembly, the tension assembly pulls the tension tendon to make the hull assembly dive to a predetermined draft, the load-discharging assembly discharges the seawater in the hull assembly, and the hull assembly floats to tighten the tension tendon; the hull assembly comprises a horizontally arranged central buoy and a plurality of side buoys, a riser is vertically arranged on the central buoy, and a deck is arranged at an end of the riser away from the central buoy; the tension assembly comprises a plurality of groups of jacks, the plurality of groups of jacks are arranged on the deck, each group of jacks is arranged in one-to-one correspondence with the side buoys, steel strands are connected to the jacks, a cable guide hole is arranged on the side buoy, the steel strands pass through the cable guide hole to connect to the tension tendon, and an end of the tension tendon away from the steel strands is connected to the seabed.

2. The compression load device of the four-column truss tension-leg floating wind turbine foundation platform according to claim 1 is characterized in that: A plurality of side buoys are arranged around the outer periphery of the central buoy, the central buoy and the plurality of side buoys are connected by a first cross brace, adjacent side buoys are connected by a second cross brace, and the deck and the plurality of side buoys are connected by a connecting pipe.

3. The compression load device of the four-column truss tension-leg floating wind turbine foundation platform according to claim 1 is characterized in that: The ballast assembly includes a ballast pipeline, one end of which is arranged in the external seawater, and the other end of which is respectively connected to the central buoy and the side buoy. The external seawater is injected into the central buoy and the side buoy through the ballast pipeline to make the hull assembly dive to a predetermined draft level.

4. The compression load device of the four-column truss tension-leg floating wind turbine foundation platform according to claim 3 is characterized in that: The ballast pipeline includes a main ballast pipeline, a first branch and a second branch. One end of the main ballast pipeline is connected to a ballast pump, which is placed in external seawater. The other end of the main ballast pipeline passes through a riser to be connected to the first branch, and the first branch is arranged in a central buoy. The other end of the main ballast pipeline also passes through the riser and a first cross brace to be connected to the second branch, and the second branch is arranged in a side buoy.

5. The compression load device of the four-column truss tension-leg floating wind turbine foundation platform according to claim 4 is characterized in that: The load-discharging assembly includes a load-discharging pipeline, one end of which passes through the deck to the outside of the hull, and the other end is respectively connected to the central buoy and the side buoy. The seawater in the central buoy and the side buoy is discharged through the load-discharging pipeline, and the hull floats to tighten the tension tendon.

6. The compression load device of the four-column truss tension-leg floating wind turbine foundation platform according to claim 5 is characterized in that: The load-carrying pipeline includes a main load-carrying pipeline, a third branch and a fourth branch. One end of the main load-carrying pipeline passes through the deck to the outside of the hull, and the other end of the main load-carrying pipeline passes through the riser to be connected with the third branch. The third branch is arranged in the central buoy. The other end of the main load-carrying pipeline also passes through the riser and the first cross brace to be connected with the fourth branch. The fourth branch is arranged in the side buoy.

7. The pressure-discharging device of the four-column truss tension-leg floating wind turbine foundation platform according to claim 6 is characterized in that: It also includes an electric submersible pump and a displacement pump. The electric submersible pump is arranged in the central buoy and connected to the third branch. The displacement pump is arranged in the side buoy and connected to the fourth branch.

8. The compression load device of the four-column truss tension-leg floating wind turbine foundation platform according to claim 6 is characterized in that: It also includes a jet pump, which is arranged in the side buoy and is connected to the main ballast pipeline and the main load-discharging pipeline respectively.

9. The pressure-discharging device of the four-column truss tension-leg floating wind turbine foundation platform according to claim 6 is characterized in that: It also includes multiple electro-hydraulic remote control valves. The first branch, the second branch, the third branch and the fourth branch are all provided with electro-hydraulic remote control valves to control the on and off of the first branch, the second branch, the third branch and the fourth branch.

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