Pit tower reinforcing structure of wind generating set

Abstract

The utility model relates to the technical field of tower drum structures of wind driven generators, in particular to a pit tower drum reinforcing structure of a wind driven generator set, which comprises a plurality of reinforcing parts arranged along the inner wall surface and / or the outer wall surface of a tower drum along the circumference at intervals, and the reinforcing parts extend along the height direction of the tower drum and are fixedly connected with the tower drum. An upper stabilizing structure is arranged at the upper end of the reinforcing piece, and a lower stabilizing structure is arranged at the lower end of the reinforcing piece. By improving the reinforcing structure and perfecting the reinforcing method, the pits in the tower drum can be quickly treated, the overall strength of the treated tower drum is kept stable and consistent, the subsequent working requirements can be met, and the situation that the subsequent stable operation is affected due to potential safety hazards caused by abnormal local structural strength is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wind turbine tower structure, specifically relates to a wind generating set pit tower reinforcing structure. BACKGROUND

[0002] In the field of wind power generation today, the tower of the wind turbine generator set as the key structure supporting the whole wind turbine plays a vital role. However, in the long-term operation process, the tower surface appears pit situation, which brings serious challenge to the safe and stable operation of the wind turbine generator set.

[0003] From the cause, external force impact is an important factor. In the complex field environment, the wind turbine generator set may suffer from various external force impacts such as bird impact, accidental collision of construction machinery, foreign matter impact under extreme weather conditions and so on. These external forces act on the tower surface, which exceeds the local bearing capacity of the material, thereby causing the formation of pit. At the same time, material aging is also an important factor. Long-term exposure to natural environment, the tower material will be affected by ultraviolet radiation, wind and rain erosion, temperature change and other natural factors, gradually aging. The aging of the material will lead to the decrease of its mechanical properties, the decrease of toughness and the increase of brittleness, which is easy to appear pit and other surface defects when subjected to certain stress.

[0004] The existence of tower surface pit will bring many serious consequences. First of all, it significantly weakens the structural strength and stability of the tower. The design bearing capacity of the tower is based on the premise of its complete surface and uniform stress distribution. Once the pit appears, the local structural strength will be greatly reduced, and the pit part and its surrounding area may become stress concentration point when bearing normal working load, which may cause further structural damage, even lead to the overall instability of the tower, and cause serious safety accidents. Secondly, the pit will reduce the bearing capacity of the tower. In the operation process of the wind turbine generator set, the tower needs to bear the weight of the wind wheel, nacelle and other components and various loads produced by wind force. The pit on the tower surface will change the distribution of these loads, reduce the bearing capacity of some areas, thereby limit the maximum load that the whole tower can bear, and affect the normal operation and power generation efficiency of the wind turbine generator set.

[0005] There are also some defects in existing repair techniques that need to be solved urgently. Although some repair methods can fill the pits to some extent, there is a big difference between the repaired part and the original tower surface in mechanical properties and durability. For example, some surface coating repair techniques can quickly restore the appearance of the tower surface, but the bonding strength between the coating and the base material is limited, and under the combined action of long-term wind, temperature change and other factors, the coating is prone to fall off, crack and other phenomena, causing the repaired part to reappear problems. In addition, some traditional welding repair methods can effectively restore the local strength of the tower, but the welding process may affect the metallographic structure of the tower base material, introduce new internal stress, affect the overall performance of the tower, and the welding repair requires a high level of technical skills from the operator. If not handled properly, it may further reduce the quality of the tower.

[0006] At the same time, the existing repair techniques also have certain problems in terms of convenience and economy. Some advanced repair techniques require complex equipment and professional technicians, and the operation process is complicated and the repair cycle is long, which will increase the downtime of the wind turbine generator and cause serious power generation loss. Moreover, the cost of these repair techniques is high, and for large-scale wind farms, frequent use of such repair methods will bring heavy economic burden. In addition, some repair techniques also lack effective means for detection and quality evaluation after repair, making it difficult to ensure that the repaired part can meet the requirements of long-term safe operation and posing certain safety hazards.

[0007] In summary, the pit problem on the surface of the tower of the wind turbine generator has become one of the key factors restricting the safe, stable and efficient development of the wind power industry, and more advanced and reliable repair techniques and preventive measures are needed to address the many challenges faced by existing techniques. Therefore, a more reasonable technical solution is needed to solve the technical problems in the existing technology. Practical new type content

[0008] At least to overcome one of the above-mentioned defects, the utility model provides a kind of pit tower reinforcing structure of wind turbine generator, by setting reinforcing structure in the inside and outside of tower, overallly promote the structural strength of tower, maintain the stability of tower itself, to eliminate the safety hazard existing in the long-term operation of wind turbine.

[0009] In order to achieve the above purpose, the reinforcing structure disclosed by the utility model can adopt the following technical scheme:

[0010] A kind of pit tower reinforcing structure of wind turbine generator, including several reinforcing pieces that are arranged along the circumference along the inner wall surface and / or outer wall surface of tower, the reinforcing piece extends along the height direction of tower and is connected and fixed with tower, upper stabilizing structure is arranged at the upper end of reinforcing piece, and lower stabilizing structure is arranged at the lower end of reinforcing piece.

[0011] The reinforcing structure disclosed above is attached to the inner wall surface or the outer wall surface of the tower drum through the reinforcing member, and the reinforcing member is connected and fixed by the upper stabilizing structure and the lower stabilizing structure, so that the attachment and support of the reinforcing member to the inner wall of the tower drum are effectively guaranteed, the strength of the tower drum as a whole is maintained, a better repair effect is achieved, and the pit is reinforced after repair.

[0012] Further, the reinforcing member can be connected and fixed in various ways, and one of the feasible options is optimized and proposed here: the reinforcing member is connected and fixed with the tower drum through the spacers and fasteners, or the reinforcing member is welded and fixed with the tower drum. When the fasteners are used for connection, connection holes are provided on the tower drum and the reinforcing member, and the fasteners can be connection bolts or rivets.

[0013] Further, the reinforcing member can adopt various schemes, and its structure is not uniquely limited, and one of the feasible options is optimized and proposed here: the reinforcing member includes a longitudinal rib, the upper end of the longitudinal rib is connected and matched with the upper stabilizing structure through the upper connecting member, and the lower end of the longitudinal rib is connected and matched with the lower stabilizing structure through the lower connecting member. When the above scheme is adopted, the cross section of the longitudinal rib can be T-shaped.

[0014] Further, the longitudinal rib is stably connected and matched through the matching structure of the upper connecting member and the lower connecting member, and its structure is not uniquely limited, and one of the feasible options is optimized and proposed here: the upper connecting member and the lower connecting member include a connecting plate, a plurality of connection holes are provided on the connecting plate, and fasteners are provided at the connection holes. When the above scheme is adopted, the connection holes on the connecting plate are through holes, and the fasteners include bolts, rivets, etc.

[0015] Further, in other schemes, the reinforcing member can adopt other schemes, and one of the feasible options is optimized and proposed here: the reinforcing member includes a paste plate, the paste plate is attached to the inner wall surface or the outer wall surface of the tower drum, the upper end of the paste plate is tightly abutted with the upper stabilizing structure, and the lower end of the paste plate is tightly abutted with the lower stabilizing structure. When the above scheme is adopted, the paste plate can be a steel plate, the steel plate has a certain arc, can be attached to the inner wall surface and the outer wall surface of the tower drum, and thus forms a unified whole with the tower drum. The upper end and the lower end of the steel plate can be provided as a flat surface, so as to abut against the upper stabilizing structure and the lower stabilizing structure.

[0016] Further, the upper stabilizing structure can adopt various structures, and its structure is not uniquely limited, and one of the feasible options is optimized and proposed here: the upper stabilizing structure includes an upper ring rib, the upper ring rib is attached to the inner wall surface of the tower drum along the circumference and is fixed in cooperation, and the cross section of the upper ring rib is T-shaped. When the above scheme is adopted, the upper ring rib can adopt a multi-segment structure and form a ring-shaped whole after connection and cooperation.

[0017] Further, the lower stabilizing structure can adopt various structures, and the structure is not uniquely limited, and one feasible selection is optimized and proposed herein: the lower stabilizing structure comprises a lower ring rib, the lower ring rib is attached to the inner wall surface of the tower drum along the circumference and is fixed in cooperation, and the cross section of the lower ring rib is a T-shaped surface. When the above scheme is adopted, the lower ring rib can adopt a multi-section structure, and the ring-shaped whole is formed after connection and cooperation.

[0018] The above scheme discloses a reinforcing structure, and the utility model also provides a reinforcing method, which is described below.

[0019] A concave tower drum reinforcing method of a wind turbine generator set comprises the following steps:

[0020] The surface of the tower drum with the concave is cleaned to keep the surface of the tower drum clean and dry;

[0021] According to the size of the concave, the design specification and the bearing capacity of the tower drum, the specifications of the reinforcing member, the upper stabilizing structure and the lower stabilizing structure are determined;

[0022] The setting positions of the reinforcing member, the upper stabilizing structure and the lower stabilizing structure are marked on the tower drum;

[0023] In the order from bottom to top, the lower stabilizing structure, the reinforcing member and the upper stabilizing structure are sequentially arranged;

[0024] The surface treatment is performed on the arranged tower drum, reinforcing member, lower stabilizing structure and upper stabilizing structure, specifically including paint spraying and glue coating, for rust prevention and sealing.

[0025] Further, the reinforcing method disclosed above can adopt different reinforcing methods when different reinforcing members are adopted, and one feasible selection is optimized and proposed herein: when the reinforcing member is arranged, the fastener is connected to anchor or welded to fix; when the upper stabilizing structure and the lower stabilizing structure are arranged, the fastener is connected to anchor or magnetically connected to fix. When the above scheme is adopted, the fastener can be a bolt or a rivet, and the magnetic connection can be a magnet.

[0026] Further, in order to better cover the concave area and guarantee the reinforcing effect, the arrangement of the reinforcing member needs to be optimized: after the reinforcing member is arranged, the reinforcing member covers the concave area in the circumferential direction, the covering surface of the reinforcing member exceeds the edges of the concave on both sides by at least 150 mm in the circumferential direction, and the covering surface of the reinforcing member exceeds the edges of the concave on both sides by at least 150 mm in the vertical direction. When the above scheme is adopted, the arrangement of the reinforcing member can be adjusted according to the actual size of the concave, and the larger the size of the concave is, the greater the distance between the reinforcing member and the edges of the concave is.

[0027] Compared with the prior art, some beneficial effects of the technical scheme disclosed in the utility model include:

[0028] By improving the reinforcement structure and refining the reinforcement methods, dents on the tower can be quickly repaired, and the overall strength of the treated tower remains stable and consistent, meeting subsequent operational requirements and avoiding safety hazards caused by localized structural strength anomalies that could affect stable operation. Furthermore, this is specifically reflected in the following aspects:

[0029] 1. Improve structural strength: The method for reinforcing the tower of a wind turbine generator set with a pit provided by this utility model can effectively enhance the structural strength of the tower and improve its load-bearing capacity by adding longitudinal and circumferential reinforcements or inner and outer plates at the pit location, thereby reducing stress concentration caused by the pit.

[0030] 2. Enhanced stability: The method for reinforcing the recessed tower of a wind turbine generator provided by this utility model can improve the overall stability of the tower, making it more reliable under external loads such as wind force, and reducing the risk of buckling and deformation.

[0031] 3. Convenient construction: The wind turbine generator set dented tower reinforcement method provided by this utility model has a relatively simple construction process for both reinforcement methods. It does not require large-scale dismantling and modification of the tower and can complete the reinforcement work in a short time, reducing the impact on the normal operation of the wind turbine generator set.

[0032] 4. Strong applicability: The method for reinforcing the tower of a wind turbine generator set with a pit provided by this utility model can select a suitable reinforcement method according to the specific situation of the pit and the structural characteristics of the tower, which has strong applicability and flexibility. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram showing the reinforcement of the tower's dent (with longitudinal reinforcement bars and side plates also included as strengthening components).

[0035] Figure 2 This is a magnified view of the connection point between the longitudinal reinforcement and the circumferential reinforcement.

[0036] Figure 3 This is a structural schematic diagram of the longitudinal reinforcement.

[0037] Figure 4 This is a schematic diagram of the lower ring reinforcement.

[0038] Figure 5 Fig. 1 is a schematic view of the inner and outer pasting plates.

[0039] Figure 6 Fig. 2 is a schematic view of the cross section of the inner and outer pasting plates.

[0040] In the above figures, the meanings of the respective marks are as follows:

[0041] 1, tower drum; 2, longitudinal reinforcement; 3, connecting plate; 4, rivet; 5, lower ring reinforcement; 6, upper ring reinforcement; 7, inner pasting plate; 8, outer pasting plate. DETAILED DESCRIPTION

[0042] The present embodiment will be further explained below in combination with the drawings and specific examples.

[0043] In view of the fact that the existing technology of tower drum pit repair and reinforcement scheme has local stress, the overall strength of the tower drum is uneven, and there is a potential safety hazard of re-damage in use, the following embodiments are optimized and overcome the defects in the prior art.

[0044] Embodiment 1

[0045] As shown in Figures 1-6 , the present embodiment provides a wind turbine generator set pit tower drum reinforcement structure, which comprises a plurality of reinforcing members arranged along the inner wall surface and / or outer wall surface of the tower drum 1 along the circumference, the reinforcing members extend along the height direction of the tower drum 1 and are connected and fixed with the tower drum 1, an upper stabilizing structure is arranged at the upper end of the reinforcing member, and a lower stabilizing structure is arranged at the lower end of the reinforcing member.

[0046] The reinforcement structure disclosed in the present embodiment is attached to the inner wall surface or outer wall surface of the tower drum 1 through the reinforcing member, and the reinforcing member is connected and fixed through the upper stabilizing structure and the lower stabilizing structure, which effectively guarantees the attachment and support of the reinforcing member to the inner wall of the tower drum 1, so as to maintain the overall strength of the tower drum 1 and achieve better repair effect, so that the pit is reinforced after repair.

[0047] The reinforcing member can be connected and fixed in various ways, and one of the feasible options is optimized and adopted here: the reinforcing member is connected and matched with the tower drum 1 through the spacer fastener, or the reinforcing member is welded and fixed with the tower drum 1. When the above scheme is adopted, the connecting holes are arranged on the tower drum 1 and the reinforcing member, and the fastener can adopt connecting bolts or rivets 4, etc.

[0048] The reinforcing member can adopt various schemes, and its structure is not uniquely limited, and one of the feasible options is optimized and adopted here: as Figure 1 , Figure 2 , Figure 3As shown, the reinforcing member includes a longitudinal rib 2. The upper end of the longitudinal rib 2 is connected to the upper stabilizing structure via an upper connector, and the lower end of the longitudinal rib 2 is connected to the lower stabilizing structure via a lower connector. When using the above scheme, the cross-section of the longitudinal rib 2 can be a T-shaped surface.

[0049] The longitudinal rib 2, through the mating structure formed by the upper and lower connecting parts, can achieve a stable connection. Its structure is not uniquely limited; here, optimization is performed, and one feasible option is adopted: the upper and lower connecting parts include a connecting plate 3, which has several connecting holes, and fasteners are installed at the connecting holes. In this scheme, the connecting holes on the connecting plate 3 are through holes, and the fasteners include bolts, rivets 4, etc.

[0050] In some other solutions, the reinforcement can be implemented using different methods; here, we optimize and adopt one of the feasible options: such as... Figure 5 , Figure 6 As shown, the reinforcing member includes a mounting plate, which adheres to the inner or outer wall surface of the tower 1. The upper end of the mounting plate abuts against the upper stabilizing structure, and the lower end of the mounting plate abuts against the lower stabilizing structure. When adopting the above scheme, the mounting plate can be made of steel plate with a certain curvature, allowing it to adhere to both the inner and outer wall surfaces of the tower 1, thus forming a unified whole with the tower 1. The upper and lower ends of the steel plate can be set as flat surfaces, thus adhering to the upper and lower stabilizing structures.

[0051] The stable structure can adopt various structures, and its structure is not limited to one. Here, we optimize and adopt one of the feasible choices: such as Figure 4 As shown, the upper stabilizing structure includes an upper ring rib 6, which is attached to and fixed to the inner wall of the tower cylinder 1 along its circumference. The cross-section of the upper ring rib 6 is T-shaped. When adopting the above scheme, the upper ring rib 6 can be a multi-segment structure, which is connected and fitted to form a ring-shaped whole.

[0052] The lower stabilizing structure can adopt various structures, and its structure is not limited to a single one. Here, we optimize and adopt one feasible option: the lower stabilizing structure includes a lower ring rib 5, which is attached to and fixed to the inner wall surface of the tower cylinder 1 along the circumference. The cross-section of the lower ring rib 5 is T-shaped. When adopting the above scheme, the lower ring rib 5 can adopt a multi-segment structure, which forms a ring-shaped whole after being connected and fitted.

[0053] Example 2

[0054] The above embodiment 1 discloses a reinforcement structure. This embodiment provides a reinforcement method, which will be described below.

[0055] A method for reinforcing the dented tower of a wind turbine generator set includes:

[0056] The surface of the tower drum 1 with the pits is cleaned to keep the surface of the tower drum 1 clean and dry;

[0057] The specifications of the reinforcing member, the upper stabilizing structure and the lower stabilizing structure are determined according to the pit size of the tower drum 1, the design specifications and the bearing capacity of the tower drum 1;

[0058] The setting positions of the reinforcing member, the upper stabilizing structure and the lower stabilizing structure are marked on the tower drum 1;

[0059] The lower stabilizing structure, the reinforcing member and the upper stabilizing structure are sequentially set in the order from bottom to top;

[0060] The tower drum 1, the reinforcing member, the lower stabilizing structure and the upper stabilizing structure set are subjected to surface treatment, specifically including paint spraying and glue coating, for rust prevention and sealing.

[0061] The reinforcing method disclosed above can adopt different reinforcing methods when different structures of reinforcing members are used, and one of the feasible options is optimized and adopted as follows: when the reinforcing member is set, the reinforcing member is fixed by anchoring or welding through fasteners; when the upper stabilizing structure and the lower stabilizing structure are set, the upper stabilizing structure and the lower stabilizing structure are fixed by anchoring or magnetic force connection through fasteners. When the above scheme is adopted, the fasteners can be bolts or rivets 4, and the magnetic force connection can be a magnet.

[0062] In order to better cover the pit area and guarantee the reinforcing effect, the setting of the reinforcing member needs to be optimized: after the reinforcing member is set, the reinforcing member covers the pit area in the circumferential direction, and the coverage of the reinforcing member exceeds the edges of the pit by at least 150 mm in the circumferential direction and by at least 150 mm in the vertical direction. When the above scheme is adopted, the setting of the reinforcing member can be adjusted according to the actual size of the pit, and the larger the size of the pit is, the greater the distance by which the reinforcing member exceeds the edges of the pit is.

[0063] According to the reinforcing method provided in the embodiment, two actual cases are listed for illustration, and the following two cases are actual project cases, which specifically disclose the construction parameters:

[0064] Case one: longitudinal reinforcement and ring reinforcement method

[0065] Step 1: The surface of the tower drum pit is cleaned to ensure that the surface is clean and dry.

[0066] Step 2: The reinforcing structure is designed according to the measurement data, the longitudinal reinforcement 2 is 2300 mm long, the cross section is T250x200x20, and the number is 5; the lower ring 5 and the upper ring 6 have an outer diameter of 4960 mm, and the cross section is T250x250x30; the connecting plate 3 has a size of 200 mm x 110 mm x 15 mm; and the rivet 4 adopts 10.9 level M24.

[0067] Step 3: Mark the installation positions of the longitudinal ribs 2, lower ring ribs 5, and upper ring ribs 6 on the surface of the tower drum using a marker. The lower ring ribs 5 and upper ring ribs 6 are located at the upper and lower ends of the longitudinal ribs 2, respectively.

[0068] Step 4: Fix the magnetic drill inside the tower drum and drill holes one by one. The hole diameter is 26mm. Drill from bottom to top in sequence. After drilling, clean the hole wall and the surface of the drum wall.

[0069] Step 5: Use fixing pins to temporarily fix the lower ring ribs 5, longitudinal ribs 2, and upper ring ribs 6 with the tower drum. According to the positions of the holes opened on the tower drum wall, install the lower ring ribs 5, longitudinal ribs 2, and upper ring ribs 6 in sequence from bottom to top. The spacing between the longitudinal ribs 2 is 360mm. Each side is wider than the pit area by 150mm. The longitudinal ribs are connected with the lower ring ribs 5 and upper ring ribs 6 through the connecting plates 3.

[0070] Step 6: Spray paint, apply glue, and perform rust prevention and sealing treatment.

[0071] Case Two: Internal and External Lining Plate Reinforcement Method

[0072] Step 1: Clean the pit surface of the tower drum thoroughly to ensure a clean and dry surface.

[0073] Step 2: Design the reinforcement structure according to the measurement data. The internal lining plate 7 has an outer diameter of 4960mm, a thickness of 20mm, a height of 2300mm, and a central angle of 42°. The external lining plate 8 has an inner diameter of 5040mm, a thickness of 20mm, a height of 2300mm, and a central angle of 42°. The rivet 4 is a 10.9 grade M24. Pre-drill the installation holes, and the internal lining plate 7 and external lining plate 8 rivet installation holes should correspond one by one.

[0074] Step 3: Build a temporary support platform inside the tower drum, hoist the internal lining plate 7 to the pit position and fix it, and the internal lining plate 7 completely covers the pit position.

[0075] Step 4: According to the position of the internal lining plate 7, fix the magnetic drill inside the tower drum and drill holes one by one in sequence from bottom to top. The hole diameter is 26mm. After drilling, clean the hole wall and the surface of the drum wall.

[0076] Step 5: Use a crane to cover the external lining plate 8 outside the pit of the tower drum, corresponding to the internal lining plate 7. Adjust its position to make it fit well with the internal lining plate 7 and the surface of the tower drum, and use temporary support devices such as fixing pins to fix the external lining plate.

[0077] Step 6: Use rivets 4 to firmly connect the internal lining plate, tower drum 1, and external lining plate 8. First, install the top two corner rivets 4, then the bottom two corners, temporarily fix using positioning pins to prevent displacement deviation, and then install in the order of "top→bottom→left→right" alternately.

[0078] Step 7: Spray paint, apply glue, and perform rust prevention and sealing treatment.

[0079] The above are the embodiments listed in the present embodiment, but the present embodiment is not limited to the above optional embodiments, and those skilled in the art can obtain other various embodiments by arbitrarily combining the above modes with each other. Any person can obtain other various forms of embodiments under the inspiration of the present embodiment. The above specific embodiments should not be understood as limiting the protection scope of the present embodiment, and the protection scope of the present embodiment should be defined by the claims.

Claims

1. A wind turbine tower pocket reinforcement structure, characterized by: The reinforcing member is connected with the tower drum (1) through the fasteners arranged at intervals, or the reinforcing member is welded with the tower drum (1).

2. A wind turbine tower pocketed tower reinforcement structure according to claim 1, characterized in that: The reinforcing member is connected with the tower drum (1) through the fasteners arranged at intervals, or the reinforcing member is welded with the tower drum (1).

3. A pocketed tower reinforcement structure for a wind turbine generator system according to claim 1 or 2, characterized in that: The reinforcing member comprises a longitudinal rib (2), the upper end of the longitudinal rib (2) is connected with the upper stabilizing structure through an upper connecting member, and the lower end of the longitudinal rib (2) is connected with the lower stabilizing structure through a lower connecting member.

4. The pocketed tower reinforcement structure for wind turbine generators as defined in claim 3, wherein: The upper connecting member and the lower connecting member comprise a connecting plate (3), a plurality of connecting holes are arranged on the connecting plate (3), and the fasteners are arranged at the connecting holes.

5. A pocketed tower reinforcement structure for a wind turbine generator system as claimed in claim 1 or 2, characterized in that: The reinforcing member comprises a pasting plate, the pasting plate is pasted on the inner wall surface or the outer wall surface of the tower drum (1), the upper end of the pasting plate is abutted against the upper stabilizing structure, and the lower end of the pasting plate is abutted against the lower stabilizing structure.

6. The wind turbine generator system pocketed tower reinforcement structure of claim 1, wherein: The upper stabilizing structure comprises an upper ring rib (6), the upper ring rib (6) is pasted on the inner wall surface of the tower drum (1) along the circumference and is fixed in cooperation, and the cross section of the upper ring rib (6) is a T-shaped surface.

7. The wind turbine generator system pocketed tower reinforcement structure of claim 1, wherein: The lower stabilizing structure comprises a lower ring rib (5), the lower ring rib (5) is pasted on the inner wall surface of the tower drum (1) along the circumference and is fixed in cooperation, and the cross section of the lower ring rib (5) is a T-shaped surface.

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