Double-layer protection device for offshore wind power tower drum

Abstract

The utility model relates to the technical field of wind power towers, in particular to a double-layer protection device for an offshore wind power tower, which comprises an annular inner-layer protection cover and an annular outer-layer protection cover which are coaxially arranged, the outer-layer protection cover comprises a frame body, an arc-shaped baffle is slidably connected onto the frame body, and the sliding direction of the baffle is the symmetry axis direction of the inner-layer protection cover. The multiple baffles are arranged in the circumferential direction of the inner-layer protective cover at intervals, the baffles are connected with the inner-layer protective cover through the multiple damping units, and the multiple damping units are evenly arranged between the baffles and the inner-layer protective cover. The noise reduction performance, the impact resistance and the corrosion and rust prevention performance are integrated, noise control, the impact resistance effect and the corrosion and rust prevention efficiency of the tower drum body in the service period can be guaranteed, the service life of offshore wind power facilities is remarkably prolonged, and meanwhile the operation and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine tower technology, specifically a double-layer protective device for offshore wind turbine towers. Background Technology

[0002] With the global energy structure shifting towards green and low-carbon development, offshore wind power, as a crucial pillar of clean energy, is experiencing explosive growth. As the tower and load-bearing structure of offshore wind power systems, the offshore wind turbine tower primarily plays a supporting role in offshore wind turbine units, while also absorbing vibrations from the unit.

[0003] However, offshore wind turbine towers are exposed to harsh environments with high salt spray, high humidity, strong ultraviolet radiation, and the impact of ocean waves, facing severe corrosion and structural safety challenges. Traditional anti-corrosion and anti-rust technologies for offshore wind turbine towers mainly rely on epoxy and polyurethane coating systems. However, due to the harsh service environment and the long-term direct erosion by ocean waves, the coating system is prone to chalking and lacks durability, leading to corrosion or rust on the offshore wind turbine towers. Even a thick coating of 600 to 1000 micrometers is insufficient to meet the long-term service requirements of offshore wind turbine towers for decades. Once corrosion or rust occurs on the offshore wind turbine towers, the maintenance cost can be dozens of times higher than the initial coating cost.

[0004] In addition, offshore wind turbine towers generate noise while absorbing the vibration of the turbines. This noise can have a significant adverse impact on the nearshore and marine ecosystems. Specifically, for marine life, the noise generated by wind turbine towers can interfere with the sonar communication of marine mammals and change the habitat behavior of fish. For humans, living or working in a noisy environment for a long time can pose a serious threat to people's physical and mental health. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a double-layer protective device for offshore wind turbine towers. This device integrates noise reduction, impact resistance, and corrosion and rust prevention into one unit, ensuring effective noise control and corrosion and rust prevention of the tower body during its service life. It significantly extends the service life of offshore wind power facilities and reduces operation and maintenance costs. This invention solves the problems of easy powdering, insufficient durability, and inability to meet the long-term service requirements of offshore wind turbine tower coating systems in existing technologies. It also addresses the issues of easy corrosion or rusting of offshore wind turbine towers, excessively high maintenance costs, and the significant adverse impact of noise generated by offshore wind turbine towers on the nearshore and marine ecological environment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A double-layer protective device for offshore wind turbine towers includes an annular inner protective cover and an annular outer protective cover arranged coaxially. The outer protective cover includes a frame, on which an arc-shaped baffle is slidably connected. The sliding direction of the baffle is the symmetry axis direction of the inner protective cover. There are multiple baffles, which are spaced apart from each other in the circumferential direction of the inner protective cover. The baffles are connected to the inner protective cover through several damping units, which are evenly arranged between the baffles and the inner protective cover.

[0008] Furthermore, the baffle includes two limiting rods spaced apart from each other in the horizontal direction, and a stop block detachably connected between the two limiting rods.

[0009] Furthermore, the stop blocks are multiple and arranged side by side between the two limiting rods. Each stop block includes two side blocks located at two ends in the vertical direction, and several middle blocks located between the two side blocks. The side blocks are bolted to the limiting rods on both horizontal sides.

[0010] Furthermore, the stop block is bolted to the damping unit, and the damping unit is bolted to the inner protective cover.

[0011] Furthermore, the feature is that adjacent stops interlock with each other.

[0012] Furthermore, the frame includes a base plate with vertical support columns on it. There are multiple support columns, which are respectively arranged between adjacent baffles. The upper part of the support columns is detachably connected to an annular top plate, and the inner ring of the top plate abuts against the outer ring of the inner protective cover.

[0013] Furthermore, the lower part of the baffle is slidably connected to the bottom plate, and the upper part of the baffle is slidably connected to the top plate.

[0014] Furthermore, the top plate is characterized by comprising two arc plates that abut against each other in the horizontal direction, and the arc plates are bolted to a plurality of support columns.

[0015] Furthermore, the inner protective cover is made of a damping composite material.

[0016] Compared with existing technologies, this utility model innovatively proposes a double-layer protection device for offshore wind turbine towers, achieving a multi-dimensional breakthrough in technical effectiveness. Specifically:

[0017] Firstly, in terms of noise reduction performance, the device directly attaches the inner protective cover to the outside of the tower body. As a sound-absorbing structure, the inner protective cover effectively improves the attenuation rate of high-frequency vibrations at sea and reduces the degree of noise release. At the same time, the outer protective cover forms a sound insulation structure on the outside of the tower body, cutting off the propagation path of sound waves. Through the synergistic effect of the sound absorption of the inner protective cover and the sound insulation of the outer protective cover, the noise reduction effect is significantly improved, effectively reducing the interference of marine biological communication frequency bands. This provides a comprehensive solution that combines engineering reliability and environmental friendliness for deep-sea wind power development and nearshore and marine ecological protection.

[0018] Secondly, in terms of corrosion and rust prevention, the device forms a protective structure on the outside of the tower body through an outer protective cover, which effectively avoids the long-term direct scouring effect of waves on the tower body and the long-term exposure to sunlight, thereby avoiding direct damage to the outer surface coating of the tower body, improving the durability and service life of the outer surface coating of the tower body, and significantly reducing maintenance costs from the root.

[0019] Furthermore, in terms of impact resistance, the device incorporates a damping unit between the outer and inner protective covers. When the outer protective cover is subjected to long-term wave or other external force impacts, the damping unit effectively dissipates and absorbs the impact energy. This prevents external forces from directly acting on the tower body and causing destructive damage, while also improving the durability and impact resistance of the baffle. Simultaneously, the baffle employs an interlocking structure with multiple overlapping blocks. When the baffle is impacted, the impact energy is efficiently transferred and dispersed through the contact surfaces of each block, ensuring the integrity and stability of the outer protective cover. Moreover, when a block is damaged, the damaged block can be directly replaced, further reducing maintenance costs and making the device more economical and environmentally friendly. Attached Figure Description

[0020] Figure 1 This is a diagram showing the usage state of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the top plate in this utility model;

[0023] Figure 4 This is a top view of the internal structure of the top plate in this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the baffle installed on the base plate in this utility model;

[0025] Figure 6 This is a schematic diagram of the frame structure in this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the baffle in this utility model;

[0027] Figure 8 This is an exploded view of the baffle in this utility model;

[0028] Figure 9 This is a schematic diagram of the damping unit in this utility model.

[0029] The attached figures are labeled as follows:

[0030] 1. Outer protective cover; 11. Frame; 111. Base plate; 112. Support column; 113. Top plate; 12. Baffle; 121. Limiting rod; 122. Side block; 123. Middle block; 2. Inner protective cover; 3. Damping unit; 4. Tower body. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0035] For easier understanding, please refer to Figures 1 to 9This embodiment provides a double-layer protective device for offshore wind turbine towers, located at the bottom of the tower body 4. It includes an outer protective cover 1 on the outer side and an inner protective cover 2 on the inner side. Both the outer and inner protective covers are annular structures and coaxial. The inner ring of the inner protective cover 2 is bolted to the tower body 4, meaning the inner protective cover 2 covers the tower body 4. The inner protective cover 2 is made of a damping composite material, preferably butyl rubber. As a sound-absorbing layer, the inner protective cover 2 converts mechanical energy into heat energy through viscoelastic materials, suppressing vibration transmission and reducing resonance noise. Furthermore, the inner protective cover 2 is composed of multiple small modules. The outer protective cover 1 includes a frame 11 and multiple arc-shaped baffles 12. The baffles 12 are horizontally slidably connected to the frame 11. The horizontal sliding direction of each baffle 12 is the symmetrical axis direction of the inner protective cover 2, meaning the baffle 12 can slide inwards towards the inner protective cover 2 or slide outwards away from the inner protective cover 2. In this embodiment, there are eight baffles 12, which are evenly spaced from each other in the circumferential direction of the inner protective cover 2 (i.e., adjacent baffles 12 are spaced 45° apart in the circumferential direction of the inner protective cover 2). During long-term service of the equipment, by wrapping the outer protective cover 1 around the outside of the tower body 4, the direct effects of waves and sunlight on the tower body 4 can be avoided, thereby preventing damage to the outer surface coating of the tower body 4 due to long-term erosion by waves or exposure to sunlight; in addition, the outer protective cover 1 can be regarded as a "sound insulation wall", cutting off the propagation path of sound waves around the tower body 4, effectively reducing the propagation of noise at the bottom of the tower body 4. In the horizontal direction, several damping units 3 are detachably and uniformly installed between each baffle 12 and the inner protective cover 2. Each baffle 12 is connected to the inner protective cover 2 via these damping units 3. Preferably, the damping unit 3 is a damping spring shock absorber, with its outer and inner connecting surfaces being arc-shaped curved surfaces corresponding to the outer and inner protective covers 1 and 2, respectively. Outer and inner through holes are respectively provided on the outer and inner connecting surfaces for bolt connection with the baffle and the inner protective cover 2. The number of damping units 3 can be determined based on the actual height of the outer protective cover 1 or the stress simulation experiment of the tower body 4. If there is one damping unit 3, its installation position should be close to the middle of the baffle 12; if there are multiple damping units 3, their installation positions should be evenly spaced to ensure that the damping units 3 can effectively dissipate and absorb impact energy. During the long-term service of the equipment, when the baffle 12 is impacted by external forces such as waves under certain specific environments, the baffle 12 slides horizontally inward under the force. At this time, the damping unit 3 effectively dissipates and absorbs the impact energy, enabling the baffle 12 to resist the impact of external forces such as waves under certain specific environments. On the one hand, it avoids the external force acting on the tower body 4, and on the other hand, it improves the durability of the baffle 12. After the effect of the external force impact on the baffle 12 disappears, the damping unit 3 pushes the baffle 12 to slide horizontally outward to reset.

[0036] The baffle 12 includes limiting rods 121 and stops. There are two limiting rods 121, which are spaced apart horizontally. The limiting rods 121 have a U-shaped structure. When the horizontal sides of the stops are inserted into the structural grooves of the limiting rods 121, the limiting rods 121 can limit the horizontal displacement of the stops. There are multiple stops arranged side by side between two limiting rods 121, and adjacent stops interlock with each other. During long-term service, when the baffle 12 is subjected to external impact, the impact can be diffused along the contact surface of adjacent stops piece by piece due to the interlocking of adjacent stops, improving the integrity of the baffle 12 and giving it excellent impact resistance. When a single stop is damaged and not replaced immediately (the damage is not yet discovered, or it has been discovered but not yet replaced), the friction provided by the interlocking surfaces of adjacent stops will provide support to the damaged stop, so that the baffle 12 still has a certain degree of impact resistance, which is significantly better than ordinary structures. The material of the stop block is preferably zirconia-toughened alumina ceramic (ZTA) to improve its strength, bending resistance, toughness, and wear resistance. The stop block includes a side block 122 and a middle block 123. There are two side blocks 122, located at two ends in the vertical direction, namely the upper end and the lower end of the baffle 12. The side blocks 122 are bolted to the limiting rods 121 on both sides in the horizontal direction. Specifically, the limiting rods 121 have first bolt holes at their two ends in the vertical direction, and corresponding second bolt holes are opened on the horizontal sides of the side blocks 122. After the bolts pass through the first bolt holes and the second bolt holes from the outside to the inside, the side blocks 122 are bolted to the limiting rods 121 with the nuts. Several middle blocks 123 are located between the two limiting rods 121 laterally and between the two side blocks 122 vertically. By bolting the upper and lower side blocks 122 to the limiting rods 121 on both sides, the middle blocks 123 can be restricted between the two limiting rods 121 laterally and between the two side blocks 122 vertically. Multiple or all of the stops on a baffle 12 are bolted to the damping unit 3, and the damping unit 3 is bolted to the inner protective cover 2.

[0037] The frame 11 comprises, from bottom to top, a base plate 111, support columns 112, and a top plate 113. The base plate 111 is fixedly installed on the ground (or the tower mounting base). The lower part of the support columns 112 is fixedly installed on the base plate 111. There are eight support columns 112, each positioned between the horizontal gaps of two adjacent baffles 12. A sliding gap is reserved between adjacent support columns 112 and baffles 12. The upper part of the support columns 112 is detachably connected to the top plate 113, specifically, the support columns 112 and the top plate 113 are connected by screws. The top plate 113 has a ring structure, and the inner ring of the top plate 113 is tightly abutted and fitted against the outer ring of the inner protective cover 2. The top plate 113 includes two arc-shaped plates, which abut against each other and close to form a ring top plate 113. The arc plates are bolted to three support columns 112. The lower part of the baffle 12 is slidably connected to the base plate 111, and the upper part of the baffle 12 is slidably connected to the top plate 113. Specifically, the side block 122 has a sliding block protruding from the opposite end of the interlocking surface. A first sliding groove, a second sliding groove, and a third sliding groove are respectively opened on the first top plate 113, the second top plate 113, and the base plate 111. The side block 122 installed at the lower end is slidably connected to the third sliding groove of the base plate 111 through the sliding block, and the side block 122 installed at the upper end is slidably connected to the first sliding groove of the first top plate 113 or the second sliding groove of the second top plate 113 through the sliding block. In actual installation and application, in order to prevent small particles such as sand and gravel from entering the first sliding groove, the second sliding groove, and the third sliding groove and affecting the sliding effect, the first sliding groove, the second sliding groove, and the third sliding groove can be designed to be hidden (concealed), or a protective structure can be added to the outer periphery of the outer protective cover 1.

[0038] The installation method of this utility model is as follows: First, insert two side blocks 122 and several middle blocks 123 sequentially between two limiting rods 121, and assemble a complete baffle 12 by bolting the two side blocks 122 to the limiting rods 121; second, attach the inner protective cover 2 to the outer ring of the tower body 4 by bolting; then, fix the base plate 111 with the fixed support column 112 in the preset position, ensuring that the inner protective cover 2 and the base plate 111 are coaxial, and install the multiple baffles 12 on the base plate 111 respectively, so that the side blocks 122 at the lower end of each baffle 12 are aligned with the base plate 111. A horizontal sliding connection is established; then, several damping units 3 are installed between the baffle 12 and the inner protective cover 2, and bolts are used to connect the damping units 3 and the inner protective cover 2, as well as between the damping units 3 and the corresponding stops, to achieve the connection between the baffle 12 and the inner protective cover 2; then, two arc plates are respectively attached to the outer ring of the inner protective cover 2, and are installed at the positions corresponding to the end edge blocks 122 on the baffle 12, so that multiple edge blocks 122 can slide horizontally relative to the arc plates at the same time; finally, the arc plates are connected to the support column 112 by screw connection, and a complete double-layer protective device can be assembled.

[0039] Although the present invention has been described using the above preferred embodiments, it is not intended to limit the scope of protection of the present invention. Any changes and modifications made by those skilled in the art to the above embodiments without departing from the spirit and scope of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A double-layer protection device for offshore wind power tower, characterized in that, The application relates to a protective cover which comprises a coaxially arranged annular inner protective cover (2) and an annular outer protective cover (1), wherein the outer protective cover (1) comprises a frame (11), and an arc-shaped baffle (12) is slidably connected to the frame (11); the sliding direction of the baffle (12) is the direction of the symmetry axis of the inner protective cover (2); the baffle (12) is provided with a plurality of baffle plates which are arranged at intervals in the circumferential direction of the inner protective cover (2); the baffle (12) is connected to the inner protective cover (2) through a plurality of damping units (3); and the damping units (3) are evenly arranged between the baffle (12) and the inner protective cover (2).

2. A double barrier protection device for offshore wind turbine tower, according to claim 1, characterized in that, The baffle (12) comprises two limiting rods (121) which are arranged at intervals in the horizontal direction, and a baffle block which is detachably connected between the two limiting rods (121).

3. Offshore wind turbine tower double protection device according to claim 2, characterized in that, The baffle block is provided with a plurality of baffle plates which are arranged side by side between the two limiting rods (121); the baffle plates comprise two edge blocks (122) which are respectively located at two ends in the vertical direction, and a plurality of middle blocks (123) which are located between the two edge blocks (122); and the edge blocks (122) are bolted to the limiting rods (121) on the two sides.

4. Offshore wind turbine tower double protection device according to claim 3, characterized in that, The baffle block is bolted to the damping unit (3), and the damping unit (3) is bolted to the inner protective cover (2).

5. Offshore wind turbine tower double protection arrangement according to any of claims 2 or 4, characterized in that, The adjacent baffle blocks are overlapped and interlocked.

6. The double-layered protective device for offshore wind turbine tower according to claim 1, characterized in that, The frame (11) comprises a bottom plate (111) which is provided with vertical supporting columns (112); the supporting columns (112) are provided with a plurality of supporting columns which are arranged between adjacent baffles (12); and the upper portion of the supporting column (112) is detachably connected to an annular top plate (113); and the inner circle of the top plate (113) is abutted against the outer circle of the inner protective cover (2).

7. Offshore wind turbine tower double protection device according to claim 6, characterized in that The lower portion of the baffle (12) is slidably connected to the bottom plate (111), and the upper portion of the baffle (12) is slidably connected to the top plate (113).

8. Offshore wind turbine tower double protection arrangement according to any of claims 6 or 7, characterized in that, The top plate (113) comprises two arc plates which are abutted and closed in the horizontal direction; and the arc plates are bolted to a plurality of supporting columns (112).

9. The double-layered protective device for offshore wind turbine tower according to claim 1, characterized in that, The material of the inner protective cover (2) is a damping functional composite material.

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