Scouring protection device for pile body of offshore wind power single pile

Abstract

The invention relates to the technical field of wind driven generators, in particular to an offshore wind power single pile body scouring protection device which comprises a supporting assembly, a first-stage protection assembly and a second-stage protection assembly which are sequentially and coaxially connected from bottom to top. The second-stage flow dividing barrel is in a barrel shape defined by a plurality of second-stage flow dividing sets, each second-stage flow dividing set comprises a second-stage forward-side flow dividing strip and a second-stage reverse-side flow dividing strip which are the same in shape and are symmetrically arranged, and the cross section of each second-stage forward-side flow dividing strip and the cross section of each second-stage reverse-side flow dividing strip are each of a trapezoid-like structure; and the width of one side, connected with the second-stage forward-side shunting strip, of the second-stage reverse-side shunting strip is greater than that of the other side of the second-stage forward-side shunting strip. The problem that in the prior art, a single pile body is scoured by seawater for a long time, and consequently the service life of the single pile body is very short is solved.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbines, and in particular to a scour protection device for a single offshore wind power pile. Background Art

[0002] Offshore wind power technology is one of the fastest growing areas in green energy technology, especially when the construction of onshore wind farms faces some limitations, such as large land area and noise pollution, the development of offshore wind farms has become an inevitable trend. Offshore wind turbines can convert wind on the ocean into electrical energy, which not only solves the limitations of onshore wind farms, but also utilizes the abundant wind energy resources at sea, providing an important source of energy for sustainable development in coastal economically developed areas. With the advancement of technology, the development of offshore wind farms has gradually matured and become an important part of the global energy transformation.

[0003] The name of the patent that has been made public is a Chinese patent with application number 202022810726.5, a reinforcement structure for a single pile for offshore wind power generation. Although the patent structure can achieve the reinforcement effect of the single pile foundation of the offshore wind turbine through the set tightening mechanism, the structure only protects the single pile body of the offshore wind turbine. The single pile body is still subjected to long-term erosion by seawater. In this case, the single pile body may be corroded, broken, bent or sunken, thereby accelerating the shortening of the life of the single pile body. Summary of the invention

[0004] The purpose of this application is to provide an offshore wind power monopile body scour protection device, which solves the problem in the prior art that the monopile body is subjected to seawater scour for a long time, resulting in a very short service life. The technical solution of this application:

[0005] The present application provides an offshore wind power single pile body scour protection device, comprising: a support component, a primary protection component, and a secondary protection component coaxially connected in sequence from bottom to top, wherein the secondary protection component comprises a secondary diverter tube, the secondary diverter tube is enclosed by a plurality of secondary diverter groups to form a cylindrical shape, the secondary diverter group comprises a secondary lateral diverter strip and a secondary reverse diverter strip of the same shape and symmetrically arranged, the cross-sections of the secondary lateral diverter strip and the secondary reverse diverter strip are both trapezoidal structures, and the width of one side where the secondary lateral diverter strip is connected to the secondary reverse diverter strip is greater than the width of the other side.

[0006] In some embodiments, the trapezoidal structure specifically includes a contact segment, a connecting segment, a splicing segment, and a diversion segment connected end to end, the connecting segment and the splicing segment are both straight lines and the length of the connecting segment is greater than the length of the splicing segment; the contact segment is an arc line and multiple contact segments are enclosed to form a complete circle; the diversion segment is a wavy line, the part close to the splicing segment protrudes toward the side away from the contact segment, and the part close to the connecting segment is recessed toward the side close to the contact segment.

[0007] In some embodiments, the connecting section of the secondary cis-side shunt strip is connected to the connecting section of the secondary converse-side shunt strip.

[0008] In some embodiments, the first-level protection component includes a first-level diverter pipe, and the first-level diverter pipe includes a first-level inner tube, a limiting ring and a first-level diverter plate. A plurality of the limiting rings are evenly spaced outside the first-level inner tube, and the axis of the first-level diverter plate intersects with the axis of the first-level inner tube. A plurality of the first-level diverter plates are evenly spaced and connected to the outer circle of the first-level inner tube. The first-level diverter plate is embedded in the limiting ring on one side close to the first-level inner tube.

[0009] In some embodiments, the length of the primary diverter plate is smaller than the length of the primary inner tube.

[0010] In some embodiments, the lower end of the secondary diverter tube is connected to a limiting ring connected to the top end of the primary inner tube, and the lower end of the secondary diverter tube is located inside the interior surrounded by multiple primary diverter plates.

[0011] In some embodiments, the support assembly includes a support tube, a stabilizing tube and a stabilizing rod. The bottom of the first-level inner tube is passed through the support tube, and multiple stabilizing tubes are evenly spaced outside the support tube. The upper ends of the stabilizing tubes and the lower ends of the stabilizing tubes are connected through the stabilizing rod.

[0012] In some embodiments, the support assembly further comprises a reinforcing rod, which passes through the stabilizing tube and is inserted into the seabed.

[0013] In some embodiments, the secondary protection component also includes a secondary elastic sleeve and a secondary limiting cylinder, and the secondary diverter cylinder, the secondary elastic sleeve, and the secondary limiting cylinder are sequentially mounted from the outside to the inside; the primary protection component also includes a primary elastic sleeve and a primary limiting cylinder, and the primary diverter cylinder, the primary elastic sleeve, and the primary inner tube are sequentially mounted from the outside to the inside; the support component also includes a tertiary elastic sleeve; the primary elastic sleeve, the secondary elastic sleeve, and the tertiary elastic sleeve are all made of elastic material and the outer surfaces are coated with anti-corrosion coatings and isolation layers.

[0014] In some embodiments, the secondary limiting cylinder has the same diameter as the primary limiting cylinder and is connected, the secondary elastic sleeve, the primary elastic sleeve, and the tertiary elastic sleeve are connected to form an installation space, a single pile foundation is connected in the installation space, and the bottom of the single pile foundation passes through the tertiary elastic sleeve and is inserted into the seabed.

[0015] The technical solution of the present application has at least the following advantages and beneficial effects:

[0016] The present application provides an offshore wind power single pile body scour protection device, which realizes the limitation of the position of the single pile foundation and the support and stability of the bottom through the support component, and realizes the anti-scour protection of the part of the single pile foundation located inside the seawater through the set primary protection component. By setting a secondary lateral diversion strip and a secondary reverse diversion strip and designing their cross-sections as a trapezoidal structure, the impact force of seawater on the single pile in the splash zone acts on the surface of the secondary diversion tube, and the surface of the secondary diversion tube divides the seawater into multiple groups, each of which has two forces in the diversion group. The two forces are in opposite directions and offset the force of the seawater that continues to flow to the secondary diversion tube to achieve force offset, thereby achieving the reduction of the force of seawater acting on the surface of the secondary diversion tube, solving the problem of the single pile body being subjected to seawater scouring for a long time in the prior art, resulting in a very short service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of this application;

[0018] Figure 2 It is a schematic diagram of a trapezoidal structure in this application;

[0019] Figure 3 It is a front view of the structure of this application;

[0020] Figure 4 for Figure 3 Middle AA section view;

[0021] Figure 5 for Figure 3 Middle BB section view;

[0022] Figure 6 for Figure 3 CC section view.

[0023] In the figure: 100-secondary protection assembly; 101-secondary diverter tube; 102-secondary lateral diverter strip; 103-secondary adverse diverter strip; 104-contact section; 105-connecting section; 106-splicing section; 107-diverter section; 108-secondary elastic sleeve; 109-secondary limiting tube; 200-first-level protection assembly; 201-first-level diverter tube; 202-first-level inner tube; 203-limiting ring; 204-first-level diverter plate; 205-first-level elastic sleeve; 206-first-level limiting tube; 300-support assembly; 301-support tube; 302-stabilizing tube; 303-stabilizing rod; 304-reinforcement rod; 305-third-level elastic sleeve; 400-single pile foundation. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] Example 1

[0026] Please refer to Figure 1-Figure 6 The present application provides an offshore wind power single pile body scour protection device, which includes a support component 300, a primary protection component 200, and a secondary protection component 100 coaxially connected in sequence from bottom to top, wherein the secondary protection component 100 includes a secondary diverter tube 101, and the secondary diverter tube 101 is formed into a cylindrical shape by a plurality of secondary diverter groups, and the secondary diverter group includes a secondary lateral diverter strip 102 and a secondary reverse side diverter strip 103 of the same shape and symmetrically arranged, and the cross-sections of the secondary lateral diverter strip 102 and the secondary reverse side diverter strip 103 are both trapezoidal structures, and the width of the side where the secondary lateral diverter strip 102 is connected to the secondary reverse side diverter strip 103 is greater than the width of the other side.

[0027] It is worth mentioning that the present embodiment is provided with a support component 300, a primary protection component 200, and a secondary protection component 100. The support component 300 is used to limit the position of the single pile foundation 400 and to support and stabilize the bottom. The primary protection component 200 is used to provide anti-scour protection for the portion of the single pile foundation 400 located inside the seawater. The secondary protection component 100 is used to provide anti-scour protection for the portion of the single pile foundation 400 located at the interface between the seawater and the air above. In detail, the offshore wind turbine single pile foundation 400 is located in the splash zone above the average high tide line. Since the surface of the structure is constantly impacted by splashing seawater for a long time, the surface is always periodically moistened by seawater, the oxygen supply is sufficient, and the salt is continuously concentrated. The existing technology lacks a completely reliable protection method, and it is the part that suffers the most serious corrosion. The present embodiment provides a secondary lateral diverter strip 102 and a secondary reverse diverter strip 103 that are identical in shape and symmetrically arranged. Figure 2 and Figure 3 The dotted line in the figure indicates the flow direction of seawater. The cross-sections of the secondary lateral diverter strip 102 and the secondary adverse diverter strip 103 are designed to be a trapezoidal structure. The width of the side where the secondary lateral diverter strip 102 and the secondary adverse diverter strip 103 are connected is greater than the width of the other side, so that the impact force of seawater on the single pile in the splash zone acts on the surface of the secondary diverter tube 101, and the surface of the secondary diverter tube 101 divides the seawater into multiple groups. Each group of diverters has two forces, which are in opposite directions and offset the force of the seawater that continues to flow toward the secondary diverter tube 101 to achieve force offset, thereby achieving a reduction in the force of seawater acting on the surface of the secondary diverter tube 101, solving the problem in the prior art that the single pile body is subjected to long-term erosion by seawater, resulting in a very short service life.

[0028] In some embodiments, the trapezoidal structure specifically includes a contact segment 104, a connecting segment 105, a splicing segment 106, and a diverter segment 107 connected end to end, the connecting segment 105 and the splicing segment 106 are both straight lines and the length of the connecting segment 105 is greater than the length of the splicing segment 106; the contact segment 104 is an arc line and multiple contact segments 104 are enclosed to form a complete circle; the diverter segment 107 is a wavy line, the part close to the splicing segment 106 protrudes toward the side away from the contact segment 104, and the part close to the connecting segment 105 is recessed toward the side close to the contact segment 104.

[0029] It is worth noting that if Figure 2As shown, if the contact section 104 is an arc, a closed loop can be formed by sequentially connecting multiple secondary lateral diverter strips 102 and secondary adverse diverter strips 103, and then used to connect with the outer surface of the single pile foundation 400. The length of the connecting section 105 is greater than the length of the splicing section 106, so that the wavy diverter section 107 can be better formed. On the other hand, the diverter effect can be better achieved by two diverter sections 107 extending in opposite directions. Compared with a simple arc segment, a wavy curved surface with one side convex and one side concave can better decompose and offset the force of seawater, extend the life of the secondary diverter tube 101, and extend the life of the single pile foundation 400.

[0030] In some embodiments, the connecting section 105 of the secondary lateral diverter strip 102 is connected to the connecting section 105 of the secondary lateral diverter strip 103, so that the direction of the force dispersion of the secondary lateral diverter strip 102 on the seawater is opposite to the direction of the force dispersion of the secondary lateral diverter strip 103 on the seawater. Due to the complexity of the marine environmental conditions and the damage or aging that may occur during long-term use, the monopile foundation 400 needs to be regularly inspected and maintained, or disassembled and replaced. The arrangement of this embodiment can form multiple groups of mutually offsetting forces around the entire secondary diverter tube 101, reduce the impact of seawater on the secondary diverter tube 101, further reduce the scouring effect of seawater on the monopile foundation 400, extend the service life of the monopile foundation 400, shorten the maintenance frequency, and reduce the probability of replacing the monopile foundation 400. Preferably, the length of the secondary diverter tube 101 is 1-100m, which is selected according to needs.

[0031] Example 2

[0032] Please refer to Figure 1-Figure 6 On the basis of Example 1, the primary protection component 200 includes a primary diverter pipe 201, the primary diverter pipe 201 includes a primary inner pipe 202, a limiting ring 203 and a primary diverter plate 204, a plurality of limiting rings 203 are evenly spaced outside the primary inner pipe 202, the axis of the primary diverter plate 204 intersects with the axis of the primary inner pipe 202, a plurality of primary diverter plates 204 are evenly spaced and connected to the outer circle of the primary inner pipe 202, and the primary diverter plate 204 is embedded in the limiting ring 203 on one side close to the primary inner pipe 202.

[0033] It should be noted that the portion of the single pile body that is completely immersed in seawater is less exposed to air or oxygen than the splash zone, and the scouring force of seawater is smaller. Therefore, a one-way diverter plate 204 is set in a targeted manner and its axis intersects with the axis of the first-level inner tube 202, that is, the first-level diverter plate 204 is tilted and set on the outer circle of the first-level inner tube 202. When the seawater scours, the force of the seawater is dispersed, a part returns from the opposite direction, a part is diverted along the upper and lower ends of its extension direction, and a small part is diverted to both sides, so that it is opposite to the force of the surrounding seawater and then offsets each other. The position of the first-level diverter plate 204 is fixed by the set limit ring 203 to avoid serious deformation during the process of being scoured by seawater. The middle part of the single pile foundation 400 is fixed by the set first-level inner tube 202.

[0034] In some embodiments, the lower end of the secondary flow splitter 101 is connected to the limit ring 203 connected to the top of the primary inner tube 202, and the secondary flow splitter 101 is coaxially connected to the top of the primary inner tube 202. To avoid interference between the secondary flow splitter 101 and the primary flow splitter plate 204, the lower end of the secondary flow splitter 101 is located inside the area surrounded by multiple primary flow splitter plates 204.

[0035] Example 3

[0036] Please refer to Figure 1-Figure 6 On the basis of Example 2, the support assembly 300 includes a support tube 301, a stabilizing tube 302 and a stabilizing rod 303. The bottom of the first-level inner tube 202 is inserted into the support tube 301, and multiple stabilizing tubes 302 are evenly spaced outside the support tube 301. The upper end of the stabilizing tube 302 is connected to the upper end of the support tube 301, and the lower end of the stabilizing tube 302 is connected to the lower end of the support tube 301 through the stabilizing rod 303. The support tube 301 is connected to the bottom of the single pile foundation 400, and the stabilizing tube 302 and the stabilizing rod 303 are fixed around the support tube 301, so that both the upper and lower ends of the support tube 301 have a force for limiting its position. A sealing ring is connected to the top of the support tube 301, and the bottom of the first-level diverter plate 204 abuts against the sealing ring.

[0037] In some embodiments, the support assembly 300 further includes a reinforcing rod 304, which is inserted into the seabed after passing through the stabilizing tube 302. The length of the primary diverter plate 204 is less than the length of the primary inner tube 202. By providing the reinforcing rod 304 and inserting its bottom into the seabed, the position of the stabilizing tube 302 is limited, and at the same time, a force is applied to the stabilizing rod 303, thereby ensuring that the force applied by the stabilizing rod 303 to the support tube 301 is ensured.

[0038] Preferably, a stopper is provided at a designated position of the reinforcing rod 304 , and the stopper is located above the outside of the stabilizing tube 302 .

[0039] In some embodiments, the secondary protection assembly 100 further includes a secondary elastic sleeve 108 and a secondary limiting cylinder 109, and the secondary flow dividing cylinder 101, the secondary elastic sleeve 108, and the secondary limiting cylinder 109 are sequentially sleeved from the outside to the inside; the primary protection assembly 200 further includes a primary elastic sleeve 205 and a primary limiting cylinder 206, and the primary flow dividing cylinder, the primary elastic sleeve 205, and the primary inner tube 202 are sequentially sleeved from the outside to the inside; the support assembly 300 further includes a tertiary elastic sleeve 305. The primary elastic sleeve 205, the secondary elastic sleeve 108, and the tertiary elastic sleeve 305 are all directly in contact with the outer surface of the single pile foundation 400, so as to protect the outer surface of the single pile. Since the temperature of seawater changes throughout the year, in order to prevent the primary elastic sleeve 205, the secondary elastic sleeve 108, and the tertiary elastic sleeve 305 from squeezing or damaging the outer surface of the single pile foundation 400, the primary elastic sleeve 205, the secondary elastic sleeve 108, and the tertiary elastic sleeve 305 are all made of elastic materials, which can provide sufficient space for the changes of other components when they expand and contract due to temperature changes, thereby ensuring that the single pile foundation 400 can be protected at different temperatures. On the other hand, the elastic material can also generate a reaction force when the device is impacted, thereby reducing the damage to the single pile foundation 400 caused by the huge external force.

[0040] Preferably, the outer surfaces of the primary elastic sleeve 205, the secondary elastic sleeve 108, and the tertiary elastic sleeve 305 are coated with an anti-corrosion coating and an isolation layer to slow down the corrosion of the elastic material. The coating may be stainless steel, titanium alloy, nickel-based alloy, polymer material, fiberglass, carbon fiber composite material, or other seawater corrosion-resistant coating. Preferably, coatings of different materials are sequentially superimposed for coating.

[0041] In some embodiments, the secondary limiting cylinder 109 has the same diameter as the primary limiting cylinder 206 and is connected, the secondary elastic sleeve 108, the primary elastic, and the tertiary elastic sleeve 305 are connected to form an installation space, the installation space is connected to the single pile foundation 400, and the bottom of the single pile foundation 400 passes through the tertiary elastic sleeve 305 and is inserted into the seabed.

[0042] It is worth noting that, during installation of this embodiment, the primary protection component 200 is connected to the support component 300, the secondary protection component 100 is connected to the primary protection component 200, the pile gripper support seat is connected to the pile boat, and then the support component 300 is temporarily installed with the pile gripper support seat, and then the pile gripper is passed through the top of the secondary protection component 100 and connected to the pile gripper support seat, and then a temporary support pile is inserted, and the pile gripper, the secondary protection component 100, the primary protection component 200, and the support component 300 are temporarily arranged at the installation position of the single pile foundation 400 through the temporary support pile, and then the single pile foundation 400 is inserted into the seabed after passing through the pile gripper, the secondary protection component 100, the primary protection component 200, and the support component 300 in sequence, and then the single pile foundation 400 is hammered so that the length inserted into the seabed is a specified size. In detail, in order to ensure the depth of the connection between the entire protective device and the seabed, the reinforcing rod 304 is inserted into the stabilizing tube 302 when the primary protective assembly 200 is connected to the supporting assembly 300. After the single pile foundation 400 is hammered, the reinforcing rod 304 is hammered. Due to the setting of the stopper on the reinforcing rod 304, the reinforcing rod 304 will exert a force on the entire device, and the reinforcing rod 304 will drive the entire device to press down into the seabed as the depth of insertion of the reinforcing rod 304 into the seabed increases. It should be noted that the single pile foundation 400 is inserted into the protective device to achieve the fit with the inner wall of the elastic sleeve, and the seawater in the bottom space is squeezed out during the process of the entire protective device pressing down to the seabed.

[0043] The above description is only a preferred implementation mode of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An offshore wind power single pile scour protection device, characterized in that: include: A support assembly (300), a primary protection assembly (200), and a secondary protection assembly (100) are coaxially connected in sequence from bottom to top, wherein: The secondary protection component (100) comprises a secondary flow diversion tube (101), wherein the secondary flow diversion tube (101) is enclosed by a plurality of secondary flow diversion groups to form a cylindrical shape, wherein the secondary flow diversion groups comprise secondary lateral flow diversion strips (102) and secondary lateral flow diversion strips (103) of the same shape and symmetrically arranged, wherein the cross-sections of the secondary lateral flow diversion strips (102) and the secondary lateral flow diversion strips (103) are both trapezoidal structures, and the width of one side where the secondary lateral flow diversion strips (102) are connected to the secondary lateral flow diversion strips (103) is greater than the width of the other side.

2. The protective device according to claim 1, characterized in that: The trapezoidal structure specifically comprises a contact section (104), a connecting section (105), a splicing section (106), and a diversion section (107) connected end to end, wherein the connecting section (105) and the splicing section (106) are both straight lines and the length of the connecting section (105) is greater than the length of the splicing section (106); the contact section (104) is an arc line and a plurality of the contact sections (104) are enclosed to form a complete circle; the diversion section (107) is a wavy line, and a portion close to the splicing section (106) protrudes toward a side away from the contact section (104), and a portion close to the connecting section (105) is recessed toward a side close to the contact section (104).

3. The protective device according to claim 2, characterized in that: The connecting section (105) of the secondary lateral shunt strip (102) is connected to the connecting section (105) of the secondary lateral shunt strip (103).

4. The protection device according to claim 2, characterized in that: The primary protection component (200) comprises a primary flow diversion pipe (201), the primary flow diversion pipe (201) comprises a primary inner pipe (202), a limiting ring (203) and a primary flow diversion plate (204), a plurality of the limiting rings (203) are evenly spaced and sleeved outside the primary inner pipe (202), the axis of the primary flow diversion plate (204) intersects with the axis of the primary inner pipe (202), a plurality of the primary flow diversion plates (204) are evenly spaced and connected to the outer circle of the primary inner pipe (202), and a side of the primary flow diversion plate (204) close to the primary inner pipe (202) is embedded in the limiting ring (203).

5. The protection device according to claim 4, characterized in that: The length of the primary flow dividing plate (204) is smaller than the length of the primary inner tube (202).

6. The protection device according to claim 4, characterized in that: The lower end of the secondary flow dividing tube (101) is connected to a limiting ring (203) connected to the top end of the primary inner tube (202), and the lower end of the secondary flow dividing tube (101) is located inside the area surrounded by the plurality of primary flow dividing plates (204).

7. The protection device according to claim 5, characterized in that: The support assembly (300) comprises a support tube (301), a stabilizing tube (302) and a stabilizing rod (303); the bottom of the first-level inner tube (202) is inserted into the support tube (301); a plurality of stabilizing tubes (302) are evenly spaced outside the support tube (301); the upper end of the stabilizing tube (302) is connected to the upper end of the support tube (301), and the lower end of the stabilizing tube (302) is connected to the lower end of the support tube (301) via the stabilizing rod (303).

8. The protection device according to claim 7, characterized in that: The support assembly (300) further comprises a reinforcing rod (304), wherein the reinforcing rod (304) passes through the stabilizing tube (302) and is inserted into the seabed.

9. The protection device according to claim 8, characterized in that: The secondary protection assembly (100) further comprises a secondary elastic sleeve (108) and a secondary limiting cylinder (109), wherein the secondary flow dividing cylinder (101), the secondary elastic sleeve (108), and the secondary limiting cylinder (109) are sequentially sleeved from the outside to the inside; The primary protection assembly (200) further comprises a primary elastic sleeve (205) and a primary limiting cylinder (206), wherein the primary flow dividing cylinder, the primary elastic sleeve (205) and the primary inner tube (202) are sequentially sleeved from the outside to the inside; The support assembly (300) further includes a three-level elastic sleeve (305); The primary elastic sleeve (205), the secondary elastic sleeve (108), and the tertiary elastic sleeve (305) are all made of elastic material and have their outer surfaces coated with an anti-corrosion coating and an isolation layer.

10. The protection device according to claim 9, characterized in that: The secondary limiting cylinder (109) has the same diameter as the primary limiting cylinder (206) and is connected; the secondary elastic sleeve (108), the primary elastic sleeve, and the tertiary elastic sleeve (305) are connected to form an installation space; a single pile foundation (400) is connected in the installation space; and the bottom of the single pile foundation (400) passes through the tertiary elastic sleeve (305) and is inserted into the seabed.

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