A portable, assembled rain shield system

Abstract

A movable and assembled rainproof ring system includes a ring-shaped base, a sliding rail is arranged on the outer side of the base in a ring direction, a plurality of rainproof ring accessories are arranged on the outer side of the sliding rail in a detachable manner in a ring direction, and the plurality of rainproof ring accessories are spliced and sealed to form a rainproof ring. The rainproof ring system is changed from a traditional integral rainproof ring to a movable and assembled rainproof ring system. In the production, on-site installation, transportation and hoisting, wind field operation and maintenance and other links, the large-size components of the rainproof ring system are disassembled into a plurality of small components for installation. When installed, the sliding rail can be rotated to change the relative positions of the rainproof ring accessories. The work load and work intensity of the operation, modification or maintenance in the production, on-site installation, transportation and hoisting, wind field operation and maintenance and other links can be effectively reduced. Thus, the problems of long cycle, high risk and high cost in the on-site installation, transportation and hoisting, wind field maintenance and other links of the rainproof ring due to the size and weight changes of the rainproof ring are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wind turbine blade production and manufacturing, and particularly relates to a movable and assembled rainproof ring system. BACKGROUND

[0002] In recent years, the domestic wind power industry has developed rapidly. According to the public data of the National Energy Administration, by the end of 2022, the domestic wind power installed capacity increased by about 370GW. Among them, the wind wheel diameter covers the range of 87m-260m, the blade length covers the range of 43m-130m, and the root circle diameter covers the range of 1.5m-6m. The whole machine and the blade are developing towards large size. According to the current development trend, it is predicted that in the future, the wind wheel diameter of the wind power industry may reach 300m, the blade length may reach 150m, and the root circle diameter may break through 10m.

[0003] The rainproof ring of the blade has the function of preventing rainwater from entering the hub of the fan to corrode metal parts and circuits. The material used is glass fiber reinforced plastic, the forming method is pouring forming, and the installation method is fixed and bonded installation by climbing. With the trend of large-scale development of the whole machine and the blade, the diameter and weight of the rainproof ring provided by the blade also increase accordingly. For example, the weight of the rainproof ring of the blade of the wind wheel with a diameter of 120m is about 20Kg, and the weight of the rainproof ring of the blade of the wind wheel with a diameter of 210m is about 60-70Kg. This has a great impact on the period, safety risk and cost of the installation of the rainproof ring, the transportation / lifting of the blade, the maintenance and replacement of the rainproof ring of the wind field, and the like. Details are shown in the following table 1.

[0004]

[0005]

[0006] Table 1 SUMMARY

[0007] To solve the technical problems of the rainproof ring that the period, cost and risk of each link increase due to the increase of the size and weight of the blade, the application provides a movable and assembled rainproof ring system.

[0008] The purpose of the application is achieved by the following technical scheme. According to the application, a movable and assembled rainproof ring system is provided, which comprises a ring-shaped base, a slide rail is arranged on the outer side of the base in a ring shape, a plurality of rainproof ring accessories are arranged on the outer side of the slide rail in a ring shape in a detachable manner, and the plurality of rainproof ring accessories are spliced and sealed to form a rainproof ring.

[0009] Further, a groove with a narrow outer side and a wide inner side is arranged on the outer side of the base in a ring shape, a boss with a similar cross section to the cross section of the groove on the base is arranged on the inner side of the slide rail, and the boss on the inner side of the slide rail is movably arranged in the groove on the outer side of the base.

[0010] Further, the two outer walls and the bottom wall of the inner side portion of the slide rail are provided with rollers which roll in the inner wall of the groove of the outer side portion of the base.

[0011] Further, the outer side portion of the base is provided with a ring-shaped protrusion, and a groove with a narrow outer side and a wide inner side is arranged on the ring-shaped protrusion.

[0012] Further, a protective cover is fixedly arranged on the base, and covers the outer side of the fitting portion between the base and the slide rail.

[0013] Further, the outer side portion of the slide rail is provided with an embedded groove, and the mounting portion of the rainproof ring assembly is inserted and fixed in the embedded groove.

[0014] Further, each rainproof ring assembly is bent to one side.

[0015] Further, the rainproof ring assembly is provided with a connecting piece on one side, and when installed, the connecting piece is placed on the adjacent rainproof ring assembly and sealed with silicone.

[0016] Further, the base and the slide rail are arranged in sections, and after each section of the slide rail is arranged on the corresponding section of the base, the base and the slide rail are arranged in abutment and fixed on the outer wall of the blade shell.

[0017] Further, the base, the slide rail, the rainproof ring assembly, and the protective cover are made of flexible plastic and are formed by a plastic forming process.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows: the present application changes the traditional whole rainproof ring into a movable and assembled rainproof ring system, and in the production, on-site installation, transportation and hoisting, and wind field operation and maintenance, the large-size components of the rainproof ring system are disassembled into several small components for installation, and during installation, the slide rail can be rotated to change the relative position of the rainproof ring assembly, which can effectively reduce the workload and operation intensity of the production, on-site installation, transportation and hoisting, and wind field operation and maintenance, thereby solving the problems of long cycle, high risk, and high cost in the on-site installation, transportation and hoisting, and wind field maintenance of the rainproof ring due to the change in size and weight of the rainproof ring.

[0019] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are as follows. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole sectional view of an embodiment of a movable and assembled rainproof ring system of the present application.

[0021] Figure 2 for Figure 1 Cross-sectional view of the protective shield;

[0022] Figure 3 for Figure 1 Cross-sectional view of the central base;

[0023] Figure 4 for Figure 1 Cross-sectional view of the middle slide rail;

[0024] Figure 4a for Figure 1 Side view of the middle slide rail;

[0025] Figure 4b for Figure 4a Enlarged view of point A in the middle;

[0026] Figure 5 for Figure 1 Cross-sectional view of the rainproof ring fitting;

[0027] Figure 5a for Figure 1 Side view of the rainproof ring fittings after installation;

[0028] Figure 5b for Figure 5a Enlarged installation diagram at point B.

[0029] [Attached image labels]

[0030] 1-Base, 2-Screw, 3-Protective cover, 4-Rainproof ring accessory, 5-Bolt, 6-Slide rail, 7-Roller, 8-Adhesive material, 9-Blade housing. Detailed Implementation

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

[0032] An embodiment of the present invention provides a movable, modular rainproof ring system, such as... Figures 1 to 5b As shown, after the blade is manufactured, the rainproof ring system is installed at the blade root. Different parameters of the rainproof ring system are designed according to different blade profiles and different root pitch circle diameters. The rainproof ring system includes a base 1, a slide rail 6, rainproof ring accessories 4, and a protective cover 3. The entire rainproof ring system is a rotating structure, as shown... Figure 1The rotary section view of the rainproof ring system is shown, and the rainproof ring system is arranged around the outer wall of the blade root section circle of the blade shell 9. The rainproof ring system comprises a fixed part and a moving part, the fixed part is fixed relative to the blade shell 9, and the moving part is arranged in rotation relative to the fixed part. The fixed part comprises a base 1 and a protective cover 3 fixed on the base 1, and the moving part comprises a sliding rail 6 and a rainproof ring accessory 4 fixed on the sliding rail 6.

[0033] The base 1 is a ring-shaped special-shaped member, and the inner bottom of the base 1 and the outer side wall of the blade shell 9 can be fixed by mechanical connection or adhesive connection, for example, Figure 1 In this embodiment, an adhesive material 8 is arranged between the inner wall of the base 1 and the outer wall of the blade shell 9, and the base 1 is fixed on the blade shell 9 by adhesive. The outer top of the base is arranged with a groove with a narrow outer side and a wide inner side in a ring shape, which provides a track for the moving part of the rainproof ring system and has a fixing effect on the moving part to prevent the moving part from derailing. In this embodiment, the outer side of the base 1 is arranged with a boss in a ring shape, and the groove with a narrow outer side and a wide inner side is arranged in a ring shape on the boss.

[0034] The sliding rail 6 is a ring-shaped special-shaped member, and the inner bottom of the sliding rail 6 is arranged with a boss similar in section to the groove on the base. After the boss on the inner bottom of the sliding rail is fitted into the groove of the base, a gap is left between the outer side wall of the boss and the inner wall of the groove. The two outer side walls and the bottom wall of the boss on the inner bottom of the sliding rail are provided with rollers 7, so that the sliding rail 6 can slide on the base 1. In this embodiment, the inner bottom of the sliding rail 6 is arranged with a plurality of ring-distributed segmented bosses, as shown in Figure 4a 、 Figure 4b Each boss is provided with rollers 7 on both sides and the bottom side. In other embodiments, a continuous boss can also be arranged on the inner bottom of the sliding rail 6 in a ring shape, and the rollers 7 are distributed on both sides and the bottom side of the boss.

[0035] The outer top of the sliding rail 6 is arranged with an embedded groove in a ring shape, which provides a position for the installation of the rainproof ring accessory. In this embodiment, the outer top of the sliding rail 6 is arranged with a boss in a ring shape, and the embedded groove is arranged in a ring shape on the boss of the outer top of the sliding rail 6, which facilitates the installation of the rainproof ring accessory.

[0036] The protective cover 3 is a ring-shaped special-shaped member, which provides protection for the gap between the sliding rail 6 and the base 1 to prevent rainwater. As shown in Figure 2 The cross-sectional view of the protective cover 3 is shown, one side wall of the protective cover 3 matches one side wall of the boss on the base 1, and the side wall of the protective cover and the corresponding side wall of the base are fixed by screws 2. The other side wall of the protective cover covers one side of the outer top side wall of the sliding rail 6, and a gap is left between them to avoid interfering with the rotation of the sliding rail 6 on the base 1. In this embodiment, for convenience of installation, the protective cover can be divided into multiple segments in a ring shape, and the segments are installed separately during installation, and then spliced into a complete protective cover after installation. Silicone seal is used at the joint position of the protective cover.

[0037] The inner groove of the slide rail 6 is installed with several segments of the rainproof ring assembly 4 distributed in a ring shape, forming a complete trumpet-shaped rainproof ring. The cross section of the rainproof part of the rainproof ring assembly 4 is the same as or similar to the cross section of the existing rainproof ring, and the rainproof ring assembly 4 can realize the functions of local disassembly and local installation.

[0038] As shown in Figure 5a , each segment of the rainproof ring assembly 4 is in a fan shape from the axial direction; as shown in Figure 5 , each segment of the rainproof ring assembly 4 is bent to one side from the radial direction (after the rainproof ring system is installed on the blade, the rainproof ring assembly 4 is bent to one side of the root of the blade shell), which is used to shield the connection between the root of the blade shell and the hub of the fan, preventing rainwater from entering the metal parts and circuits in the hub of the fan. In this embodiment, as shown in Figure 5 , the rainproof ring assembly 4 is bent to one side twice and is divided into three segments, the inner segment of which is inserted into the inner groove of the slide rail 6, the middle segment is inclined to one side, and the outer segment is parallel to the axial direction of the blade. After the inner segment of the rainproof ring assembly 4 is inserted into the inner groove, the bolt 5 is used to pass through the hole on the boss of the outer side of the slide rail 6 where the inner groove is located and the hole on the inner segment of the rainproof ring assembly 4, so as to fix the rainproof ring assembly 4 on the slide rail 6.

[0039] As shown in Figure 5a , the outer wall of the rainproof ring assembly to be installed is surrounded by several segments of the rainproof ring assembly 4 to form a trumpet, and adjacent rainproof ring assemblies 4 are connected to each other, as shown in Figure 5b , which is a schematic diagram of the connection between adjacent rainproof ring assemblies 4. The connection piece is arranged on one side of the middle segment and the outer segment of all rainproof ring assemblies, which is placed on the adjacent rainproof ring assembly, so that the two adjacent rainproof ring assemblies are well connected, and silicone seal is used to prevent rainwater from entering the gap between the rainproof ring assemblies.

[0040] Since the rainproof ring assembly 4 is inclined to one side of the blade root, the gap between the slide rail 6 and the base 1 close to one side of the blade root is shielded by the rainproof ring assembly, and only a protective cover 3 is arranged at the gap position between the slide rail 6 and the base 1 away from the blade root.

[0041] The main rain-shielding part of the rainproof ring system is the rainproof ring assembly. When the designed blade size is larger, the number of rainproof ring assemblies corresponding to the blade can be increased, thereby reducing the weight of a single rainproof ring assembly, and thus reducing the problems of long cycle, high cost, high safety risk and the like caused by the increase in the size and weight of the rainproof ring at each link. When installing the rainproof ring assembly, the rainproof ring assembly is installed in segments. After one rainproof ring assembly is installed, the slide rail is rotated to change the position of the installed rainproof ring assembly, and the part of the slide rail where the rainproof ring assembly is not installed is moved to the position of the worker. This makes the installation process safer, reduces the installation cycle, and reduces the installation cost.

[0042] In summary, the rainproof ring system is installed on the produced blade to replace the current mainstream fixed bonding type glass steel rainproof ring. The relative position of the sliding rail can be rotated to realize the ground fast installation of the rainproof ring in the field installation link, the ground fast modification and installation in the transportation and hoisting link, and the high-altitude fast service in the wind field maintenance link. Therefore, the construction period, construction cost, and construction safety risk of the three links of field installation, temporary modification and hoisting, and wind field maintenance can be effectively reduced, and great economic benefits can be brought to the customers, the cost of the rainproof ring system can be saved, and the quality and efficiency can be improved.

[0043] In the embodiment, since the root pitch circle diameter of the blade is large, in order to facilitate the installation of the fixed part of the rainproof ring system, the sliding rail 6 and the base 1 are divided into two halves, one half of the sliding rail 6 is installed on one half of the base 1, and the other half of the sliding rail 6 is installed on the other half of the base 1. When installed on the blade, the two halves of the base 1 are respectively buckled and sleeved on the blade, and the two halves of the base 1 are spliced. The blade is usually divided into a windward surface (PS surface) and a leeward surface (SS surface), so that the two halves of the sliding rail 6 and the base 1 are set as PS sliding rails, SS sliding rails, PS bases, and SS bases, the PS sliding rails and the SS sliding rails are respectively arranged on the corresponding PS bases and SS bases, and the PS bases and the SS bases are respectively arranged on the corresponding PS surface and SS surface of the blade.

[0044] In the embodiment, the base 1, the sliding rail 6, the rainproof ring accessory 4, and the protective cover 3 can use flexible plastic as the raw material, and the forming process can use plastic forming process, so that the production mold can be maximized, and the overall weight of the rainproof ring system can be effectively reduced.

[0045] Taking the blade field installation as an example, the installation process of the rainproof ring system is as follows:

[0046] Sliding rail assembly: the SS sliding rail and the PS sliding rail are respectively installed on the corresponding SS base and PS base, and the specific installation method is that the structure with the roller 7 at the bottom of the SS sliding rail and the PS sliding rail is nested into the groove on the SS base and the PS base.

[0047] Base installation: after the production of the blade is completed, the SS base and the PS base are installed in the area corresponding to the SS surface and the PS surface of the blade, and the two ends of the SS base and the PS base are butted. The specific installation method can use bonding or mechanical fixing method to fix the base to the SS surface and the PS surface of the blade shell and simultaneously butt the two ends of the SS base and the PS base. Figure 1 The bonding material 8 is used in the mechanical fixing method.

[0048] Protective cover installation: after the base 1 is fixed, the protective cover 3 is installed on the base 1, and the protective cover 3 and the base 1 are fixed by using the screw 2, and the gap between the protective cover 3 and the base 1 can be sealed and filled by using silica gel.

[0049] Slide rail adjustment: After the base 1 is installed, manually move the slide rail to ensure that it slides smoothly in the groove of the base.

[0050] Rainproof ring accessory installation: After the base 1, slide rail 6, and protective cover 3 are installed and adjusted, install the rainproof ring accessory 4. Install several identical rainproof ring accessories 4 on the slide rail 9, such as... Figure 5a The specific quantity and size of the rainproof ring accessories A, B, C, D, E, F, G, H, I, J, K, and L shown can be adjusted according to the pitch circle diameter of the blade. During installation, the rainproof ring accessory 4 is inserted into the embedded groove, and the hole on the inner section of a single rainproof ring accessory 4 is aligned with the hole on the outer boss of the slide rail 6 and fixed with bolts 5. Adjacent rainproof ring accessories are connected by overlapping, and the connection is sealed with silicone. During installation, after installing one rainproof ring accessory, the slide rail is rotated to rotate the uninstalled area of ​​the slide rail to the position of the worker, and the next rainproof ring accessory is installed.

[0051] In the transportation and hoisting phase, the rainproof ring system can be disassembled for transport and hoisting before reinstallation, facilitating both. Compared to existing technologies, this invention is easier to disassemble and install. When modifying the system before hoisting, the rainproof ring components can be removed and modified individually before reinstallation, eliminating the need for a complete overhaul as with existing technologies, thus reducing costs and modification time. In the maintenance phase, after reaching the top of the wind turbine, workers rotate the guide rail to inspect and replace damaged rainproof ring components. Workers do not need to move, reducing safety risks associated with working at heights. Furthermore, there is no need to rotate or change the blade position to replace the rainproof ring, accelerating the maintenance cycle and further reducing costs.

[0052] In other embodiments of the present invention, the slide rail 6 can be rotatably disposed on the outside of the base in other ways. For example, a bearing can be disposed on the top of the outside of the base, with the inner ring of the bearing fixed to the base and the outer ring fixed to the slide rail 6, thereby rotatably disposing the slide rail on the base.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mobile, assembled rain screen system, characterized by: The base is annular and is fixed to the blade root. The outer side of the base is sleeved with a slide rail. The slide rail is annularly arranged on the outer side of the base. The outer side of the slide rail is detachably provided with a plurality of annularly distributed rainproof ring fittings. The rainproof ring fittings are spliced and sealed to form a rainproof ring. A protective cover is fixed to the base and covers the outer side of the joint between the base and the slide rail. Each rainproof ring fitting is bent to one side to shield the joint between the blade shell and the fan hub and to shield the other side of the joint between the base and the slide rail. The base and the slide rail are segmented. After each segment of the slide rail is arranged on the corresponding segment of the base, the base and the slide rail are fixed and arranged on the outer wall of the blade shell.

2. A removable, modular rain screen system according to claim 1, wherein: The outer side of the base is annularly provided with a groove with a narrow outer side and a wide inner side. The inner side of the slide rail is provided with a boss with a similar cross section to the groove on the base. The boss on the inner side of the slide rail is movably arranged in the groove on the outer side of the base.

3. A removable, assembled rain screen system according to claim 2, wherein: The two outer side walls and the bottom wall of the boss on the inner side of the slide rail are provided with rollers which are rollingly arranged on the inner wall of the groove on the outer side of the base.

4. The removable, modular rain screen system of claim 2, wherein: The outer side of the base is annularly provided with a boss. The boss is annularly provided with a groove with a narrow outer side and a wide inner side.

5. The removable, modular rain screen system of claim 1, wherein: The outer side of the slide rail is provided with an embedded groove. The mounting part of the rainproof ring fitting is inserted and fixed in the embedded groove.

6. The removable, modular rain screen system of claim 1, wherein: One side of the rainproof ring fitting is provided with a connecting piece. During installation, the connecting piece is placed on the adjacent rainproof ring fitting and is sealed with silicone.

7. The removable, modular rain screen system of claim 1, wherein: The base, the slide rail, the rainproof ring fitting and the protective cover are made of flexible plastic and are formed by a plastic forming process.

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