Blade tip extension structure and extension method based on wind power blade

Abstract

The invention discloses a blade tip extending structure and method based on a wind power blade. The blade tip extending structure comprises an original blade body and an assembly hole penetrating through the blade tip end of the original blade body. An opening and closing hoop assembly is arranged on the stud assembling assembly, and a plurality of first connecting structures are distributed on the opening and closing hoop assembly; the blade further comprises a newly-connected extension blade and a second connecting structure arranged at the opening end of the newly-connected extension blade, and the second connecting structure can be in butt joint with the first connecting structures on the periphery of the original blade body. On the premise that high-altitude cutting is not adopted, an extension connecting section with high stability can be formed at the connecting part of the original blade body and the newly connected extension blade, and the extension connecting section is matched with a framework support of the first connecting structure and the second connecting structure on the periphery, so that the stability of a wind power extension position is greatly improved, and the service life is prolonged; the working procedure is simplified and prolonged, and the working efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of blade tip extension, and in particular to a blade tip extension structure and an extension method based on a wind turbine blade. Background Art

[0002] As a key step in the technical transformation cycle of wind power, the extension project of wind turbine blades requires high-altitude operations, which are difficult. High-altitude cutting is the first step. After cutting, the newly connected blades need to be bonded and then hoisted to the incision, heated and cured, and the paint is applied to complete the extension process of the wind turbine. High-altitude cutting is difficult and dangerous, and the stability coefficient of the connection position is not good. For this reason, a new blade tip extension process and device are designed. Summary of the Invention

[0003] The purpose of the present invention is to provide a blade tip extension structure and extension method based on wind turbine blades. Without adopting high-altitude cutting, a highly stable extended connection section can be formed at the connection between the original blade body and the newly connected extended blade. Combined with the skeleton support of the first peripheral connection structure and the second connection structure, the stability of the wind turbine extension position is greatly improved, and its extended life is enhanced. At the same time, the extension process is simplified and the work efficiency is further improved.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: comprising: an original blade body, and an assembly hole passing through the tip end of the original blade body; and a stud assembly assembly, wherein the stud assembly assembly is provided with an opening and closing hoop assembly, and a plurality of first connection structures are distributed on the opening and closing hoop assembly; when the stud assembly assembly is assembled with the assembly hole, the opening and closing hoop assembly operates in a closed manner around the original blade body and makes the plurality of first connection structures distributed around the tip end of the original blade body; further comprising a newly connected extended blade, and a second connection structure provided on the open end portion of the newly connected extended blade, the second connection structure can be docked with the first connection structures around the original blade body to realize pre-assembly of the newly connected extended blade and the original blade body; a connecting portion is further provided on the front side of the open end portion of the newly connected extended blade, and an injection port is provided on the connecting portion. When the newly connected extended blade is pre-assembled with the original blade body, the opening edge of the connecting portion is wrapped around the front end of the original blade body, and the injection port can be used to inject adhesive.

[0005] Preferably, the stud assembly assembly includes a column and an end cap arranged at the bottom end of the column, a second gasket is provided on the outer wall of the column above the end cap, and a threaded groove is opened on the upper part of the column; a nut is threadedly connected to the threaded groove, and an assembly block is provided on the outer wall of the threaded groove below the nut, and the opening and closing clamp assembly is assembled on the assembly block; and a first gasket, which can act on the end of the assembly hole to support the bottom of the assembly block and is used for firmly locking the assembly block.

[0006] Preferably, the opening and closing clamp assembly includes a vertical plate fixed on the assembly block, a clamp ring is installed on the lower part of the vertical plate through the shaft seat, the clamp ring is enlarged in proportion to the cross-section of the vertical plate at this position and wrapped around the outer wall of the vertical plate, and a limiting arc groove is provided on the clamp ring; and a limiting long groove is provided on the vertical plate, an electric telescopic rod is provided inside the limiting long groove, and a mounting block is installed at the output end of the electric telescopic rod, a limiting column is horizontally installed on the mounting block, the limiting column extends to the inside of the limiting arc groove and slides with the limiting arc groove, when the mounting block moves up and down in the limiting long groove, the limiting column can move inside the limiting arc groove, thereby driving the clamp to deflect around the shaft seat.

[0007] Preferably, each of the first connecting structures includes a support block, and an installation frame fixed to the support block, a buckling transmission mechanism is provided inside the installation frame; and a connecting buckle slot plate connected to the installation frame, the connecting buckle slot plate includes a first connecting member, the end of the first connecting member away from the installation frame is connected to a clamping plate, a plurality of open slots are provided on the clamping plate, and a clamping slot is vertically connected to the installation frame.

[0008] Preferably, the second connecting structure includes a rotatable mounting ring mounted on the newly connected extended blade, and a plurality of connecting fasteners distributed on the mounting ring, each of the connecting fasteners corresponding to the connecting buckle slot plate one-to-one; the connecting fastener includes a support rod, and a plurality of clips fixed on the support rod in a linear array, the clips are L-shaped structures, and a plurality of limit blocks are provided on the vertical sections of the clips for limiting the engagement of the slots; and a second connecting member provided at the end of the support rod away from the mounting ring, the second connecting member is fixedly connected to the buckling slot plate assembly through the connecting block for buckling with the buckling transmission mechanism; it also includes an extension plate provided on the newly connected extended blade, the extension plate is provided with a drive motor, the output end of the drive motor passes through the extension plate and is fixedly connected to a gear, and an outer gear ring provided on the outer wall of the mounting ring, the outer gear ring is meshed with the gear for transmission, and when the extension plate is working, it is used to drive the mounting ring to rotate so that each of the connecting fastener positions is docked with the connecting buckle slot plate one-to-one, and at the same time, the buckling slot plate assembly enters the interior of the mounting frame and is placed below the buckling transmission mechanism.

[0009] Preferably, the buckling slot plate assembly includes a mounting bar, which is L-shaped, and the long section where the mounting bar is located is sequentially provided with a through slot and a second barbed tooth, and the length of the second barbed tooth decreases step by step from the end of the mounting bar to the inside.

[0010] Preferably, the clamping transmission mechanism includes a first movable frame and a second movable frame which are relatively installed inside the installation frame and can slide horizontally, a lifting frame which can slide up and down is installed horizontally between the first movable frame and the second movable frame, and a transmission rod is hinged between the bottom of one side of the lifting frame and the installation frame; the lifting frame is in the shape of a rectangular frame, and a rocker arm is installed on both sides of the end of the lifting frame by a pin shaft, and a plurality of first barbed teeth are arranged between the two rocker arms, and the plurality of first barbed teeth decrease step by step from the end of the rocker arm to the inside; a rack is fixedly installed on the second movable frame, and a transmission wheel is arranged on the pin shaft where the rocker arm is located, and the transmission wheel is engaged with the rack for transmission, so as to deflect itself when the first barbed tooth descends; and a pneumatic push rod assembly is arranged on the clamp ring, so as to drive the operation of a plurality of clamping transmission mechanisms; and a channel is opened on the side wall of the first movable frame for the entry of the clamping slot plate assembly.

[0011] Preferably, the pneumatic push rod assembly includes a mounting tube fixed on the clamp ring, and a hydraulic device fixed on the vertical plate, the output end of the hydraulic device is connected to the mounting tube through a connecting tube, and a plurality of push rod bodies are connected to the mounting tube, and the execution end of each push rod body is connected to a cross bar, and the end of the cross bar acts on the first movable frame to drive the first movable frame to move in a direction close to the original blade body, and is used to clamp the transmission mechanism and the clamping slot plate assembly to perform a clamping action.

[0012] Preferably, the lifting frame is fixed with an insertion rod vertically downward near the end of the rocker arm, and a through slot is provided on the mounting bar. The insertion rod can be inserted into the through slot and drive the mounting bar to move toward the direction close to the original blade body, thereby allowing the clip on the connecting fastener to enter the slot where the connecting buckle slot plate is located and finally complete the locking action.

[0013] A method for extending a wind turbine blade is applied to the aforementioned blade tip extension structure based on the wind turbine blade, and the extension method comprises:

[0014] S1: drilling a hole at the tip of the original blade body to form an assembly hole that runs through the blade body, and assembling the opening and closing clamp assembly to the original blade body using a stud assembly assembly;

[0015] S2: operating the opening and closing hoop assembly to surround the original blade body in a closed manner and distribute the plurality of first connecting structures around the tip of the original blade body;

[0016] S3: Utilize the second connecting structure on the open end of the newly connected extended blade. When the newly connected extended blade is docked with the original blade body, the first connecting structure and the second connecting structure are docked, so that the connection part at the front end of the newly connected extended blade completely covers the front end of the original blade body. Utilize the provided injection port to inject adhesive into the cavity area where the two are connected to form an extended connecting section.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention forms an assembly hole that runs through the upper and lower parts of the original blade body by drilling a hole on the blade tip, and assembles the opening and closing clamp assembly to the original blade body by using a stud assembly component, and then uses the first connection structure and the second connection structure to connect, which can improve the assembly efficiency, simplify the engineering workload, and at the same time enhance the stability of the connection position. This design can form an extended connection section with high stability at the connection part between the original blade body and the newly connected extended blade, and cooperate with the skeleton support of the first connection structure and the second connection structure on the periphery, so that the stability of the wind power extension position is greatly improved, thereby enhancing its extended service life.

[0019] 2. By setting up the opening and closing hoop assembly, a plurality of first connection structures can be distributed around the tip of the original blade body by utilizing its simple opening and closing action, thereby simplifying the extension process and further improving work efficiency.

[0020] 3. As another embodiment of the present invention, the lifting frame is moved up and down, so that the transmission wheel engages and transmits downward along the fixed rack, thereby driving the rocker arm to deflect downward, so that the first barb tooth is inserted into the second barb tooth to form a further barb anti-slip structure, thereby further improving safety and service life.

[0021] 4. Through the further arrangement of the buckling slot plate assembly and the buckling transmission mechanism, the connection between the newly connected extended blade and the original blade body is made tighter, and at the same time, the card piece can enter the inside of the card slot, that is, the card piece on the connecting fastener can enter the card slot where the connecting buckle slot plate is located and finally complete the locking action. In summary, under a variety of structures, the stability and safety of the extended part of the original blade body and the newly connected extended blade are guaranteed, and the connection tightness is also greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the present invention before assembly;

[0023] Figure 2 This is a schematic structural diagram of the present invention during assembly;

[0024] Figure 3 for Figure 2 Schematic diagram of a local enlarged structure;

[0025] Figure 4 It is a structural schematic diagram of another perspective of the present invention;

[0026] Figure 5 This is a schematic diagram of the assembly structure of the stud assembly component, the opening and closing hoop component, and several first connection structures of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the present invention after assembly;

[0028] Figure 7 for Figure 6 Another perspective structural diagram;

[0029] Figure 8 It is a partial enlarged structural diagram of the opening and closing hoop assembly of the present invention;

[0030] Figure 9 It is a partially enlarged structural schematic diagram of the first connecting structure and the second connecting structure after being assembled according to the present invention;

[0031] Figure 10 for Figure 9 Schematic diagram of the plane structure;

[0032] Figure 11 It is a partial enlarged structural schematic diagram of the first connecting structure and the second connecting structure before assembly of the present invention;

[0033] Figure 12 for Figure 11 Another perspective structural diagram;

[0034] Figure 13 for Figure 9 Another perspective structural diagram;

[0035] Figure 14 It is a partially enlarged structural schematic diagram of the second connection structure of the present invention;

[0036] Figure 15 for Figure 10 Schematic diagram of the local enlarged structure.

[0037] In the figure: 111, original blade body; 112, first gasket; 113, assembly hole;

[0038] 4. Stud assembly assembly; 411. Cylinder; 412. Threaded groove; 413. Second gasket; 414. End cap; 415. Assembly block; 416. Nut;

[0039] 511. Hydraulic device; 512. Mounting pipe; 513. Push rod; 514. Connecting pipe;

[0040] 6. Opening and closing clamp assembly; 611. Vertical plate; 612. Limiting long slot; 613. Clamp ring; 614. Limiting column; 615. Shaft seat; 616. Limiting arc slot; 618. Mounting block;

[0041] 7. First connecting structure; 711. Clamping plate; 712. Open slot; 713. Clamping slot; 714. First connecting member; 720. Support block; 721. Mounting frame; 723. First movable frame; 7231. Channel; 724. Transmission rod; 725. Lifting frame; 726. First barbed tooth; 727. Rocker; 728. Crossbar; 729. Column; 730. Transmission wheel; 731. Rack; 732. Second movable frame;

[0042] 8. Connecting fastener; 811. Support rod; 812. Clamp; 813. Limit block; 814. Second connecting member; 815. Connecting block; 816. Mounting strip; 817. Second barbed tooth; 818. Through slot;

[0043] 830, insert the pole;

[0044] 911, mounting ring; 912, outer gear ring; 913, gear; 914, drive motor; 915, extension plate;

[0045] 1011. Newly connected extended blade; 1012. Connecting part; 1013. Injection port. DETAILED DESCRIPTION

[0046] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. The following describes various embodiments of the present invention in detail with reference to the accompanying drawings.

[0047] Example 1

[0048] See also Figures 1 to 15The present invention preferably provides a technical solution: a tip extension structure based on a wind turbine blade, comprising: an original blade body 111, and an assembly hole 113 penetrating the tip of the original blade body 111; and a stud assembly component 4, the stud assembly component 4 is provided with an opening and closing hoop component 6, and the opening and closing hoop component 6 is distributed with a plurality of first connection structures 7; when the stud assembly component 4 is assembled with the assembly hole 113, the opening and closing hoop component 6 is operated to surround the original blade body 111 in a closed manner and make the plurality of first connection structures 7 distributed around the tip of the original blade body 111; and also includes a newly connected extended blade 1011 , and a second connecting structure arranged on the open end of the newly connected extended blade 1011, the second connecting structure can be docked with the first connecting structure 7 around the original blade body 111 to realize the pre-assembly of the newly connected extended blade 1011 and the original blade body 111; a connecting portion 1012 is also provided on the front side of the open end of the newly connected extended blade 1011, and an injection port 1013 is provided on the connecting portion 1012. When the newly connected extended blade 1011 and the original blade body 111 are pre-assembled, the opening edge of the connecting portion 1012 is wrapped around the front end of the original blade body 111, and the injection port 1013 can be used to inject adhesive.

[0049] The application, if Figure 1 As shown, a hole is drilled on the blade tip of the original blade body 111 to form an assembly hole 113 that passes through the upper and lower parts. The stud assembly component 4 is used to assemble the opening and closing hoop assembly 6 to the original blade body 111. Then, the structural characteristics and dynamic principles of the opening and closing hoop assembly 6 are utilized, as shown in FIG. Figure 2 As shown, it is operated so that it surrounds the original blade body 111 in a closed manner and a plurality of first connection structures 7 are distributed around the tip of the original blade body 111. Further, by utilizing the second connection structure on the open end of the newly connected extended blade 1011, when the newly connected extended blade 1011 is docked with the original blade body 111, the first connection structure 7 is docked with the second connection structure. The characteristics of its structure can improve assembly efficiency, simplify engineering work, and at the same time, enhance the stability of the connection position. Figure 6 As shown, at this time, the connection part 1012 at the front end of the newly connected extended blade 1011 completely covers the front end of the original blade body 111, and the provided injection port 1013 is used to inject an adhesive into the cavity area where the two are connected. The epoxy resin can be preferably epoxy resin, and the epoxy resin is combined with glass fiber to form an extended connection segment with high stability. Combined with the skeleton support of the peripheral first connection structure 7 and the second connection structure, the stability of the wind power extension position is greatly improved, and its extended life is enhanced. At the same time, the extension process is simplified and the work efficiency is further improved.

[0050] Example 2

[0051] As another embodiment of the present invention, the stud assembly component 4 includes a column 411 and an end cap 414 arranged at the bottom end of the column 411, a second gasket 413 is provided on the outer wall of the column 411 above the end cap 414, and a threaded groove 412 is opened on the upper part of the column 411; a nut 416 is threadedly connected to the threaded groove 412, and an assembly block 415 is provided on the outer wall of the threaded groove 412 below the nut 416, and the opening and closing clamp assembly 6 is assembled on the assembly block 415; and a first gasket 112, the first gasket 112 can act on the end of the assembly hole 113 to support the bottom of the assembly block 415, and is used for firmly locking the assembly block 415.

[0052] By setting the stud assembly component 4, as Figure 1 、 3 As shown in Figure 5, the original blade body 111 is drilled with an assembly hole 113 running through it from top to bottom. By utilizing the structural characteristics of the stud assembly component 4, the column 411 is passed through the bottom assembly hole 113 of the original blade body 111 and out of the assembly hole 113 at the top of the original blade body 111. The second gasket 413 and the first gasket 112 are rubber gaskets, which act on the top of the end cap 414 and the bottom of the assembly block 415 respectively. Through the deformation of the second gasket 413 and the first gasket 112, the stud assembly component 4 is adapted to the arc surface of the original blade body 111, and then under the connection action of the nut 416 and the threaded groove 412, the opening and closing clamp assembly 6 on the assembly block 415 is firmly fixed on the original blade body 111, completing the first step of the extension process.

[0053] Example 3

[0054] As another embodiment of the present invention, the opening and closing hoop assembly 6 includes a vertical plate 611 fixed on the assembly block 415, and a hoop ring 613 is installed on the lower part of the vertical plate 611 through the shaft seat 615. The hoop ring 613 is enlarged in proportion to the cross-section of the vertical plate 611 at this position and wrapped around the outer wall of the vertical plate 611, as well as a limiting arc groove 616 provided on the hoop ring 613; and a limiting long groove 612 provided on the vertical plate 611, an electric telescopic rod is provided inside the limiting long groove 612, and a mounting block 618 is installed at the output end of the electric telescopic rod, and a limiting column 614 is horizontally installed on the mounting block 618, and the limiting column 614 extends to the inside of the limiting arc groove 616 and slides with the limiting arc groove 616. When the mounting block 618 moves up and down in the limiting long groove 612, the limiting column 614 can move inside the limiting arc groove 616, thereby driving the hoop ring 613 to deflect around the shaft seat 615.

[0055] In this embodiment, by further providing an opening and closing hoop assembly 6, as shown in FIG. Figure 1 、 3, 5 and 8, it utilizes the shape of the hoop ring 613 itself and the structural characteristics of the opening and closing hoop assembly 6. When the electric telescopic rod inside the limiting long groove 612 moves downward, the limiting column 614 where the mounting block 618 is located moves along the limiting long groove 612 toward the direction close to the original blade body 111. At the same time, the limiting column 614 moves inside the limiting arc groove 616 where the hoop ring 613 is located, so that the hoop ring 613 deflects downward around the axis of the shaft seat 615 and toward the inner side close to the original blade body 111, thereby completely wrapping the periphery of the original blade body 111 until it is as shown. Figure 4 As shown, a plurality of first connection structures 7 are further distributed around the tip of the original blade body 111 , providing a prerequisite for docking the newly connected extended blade 1011 .

[0056] Example 4

[0057] As other embodiments of the present invention, each first connecting structure 7 includes a support block 720, and an installation frame 721 fixed to the support block 720, a buckling transmission mechanism is provided inside the installation frame 721; and a connecting buckle slot plate connected to the installation frame 721, the connecting buckle slot plate includes a first connecting member 714, the end of the first connecting member 714 away from the installation frame 721 is connected to a clamping plate 711, a plurality of open grooves 712 are provided on the clamping plate 711, and a clamping slot 713 vertically connected to the installation frame 721.

[0058] Furthermore, the second connecting structure includes a rotatable mounting ring 911 mounted on the newly connected extended blade 1011, and a plurality of connecting fasteners 8 distributed on the mounting ring 911, each connecting fastener 8 corresponding to the connecting fastener slot plate one by one; the connecting fastener 8 includes a support rod 811, and a plurality of clips 812 fixed to the support rod 811 in a linear array, the clips 812 are L-shaped, and a plurality of limit blocks 813 are provided on the vertical section of the clips 812 for limiting the engagement of the card slot 713; and a second connecting member 814 provided at the end of the support rod 811 away from the mounting ring 911, the second connecting member 814 is fixed by a connecting block 815 It is connected with a buckling slot plate assembly for buckling with a buckling transmission mechanism; it also includes an extension plate 915 arranged on the newly connected extended blade 1011, and a drive motor 914 is installed on the extension plate 915. The output end of the drive motor 914 passes through the extension plate 915 and is fixedly connected to a gear 913, as well as an outer gear ring 912 arranged on the outer wall of the mounting ring 911. The outer gear ring 912 is engaged with the gear 913 for transmission. When the extension plate 915 is working, it is used to drive the mounting ring 911 to rotate, so that each connecting fastener 8 position is docked with the connecting buckle slot plate one by one, and at the same time, the buckling slot plate assembly enters the interior of the mounting frame 721 and is placed under the buckling transmission mechanism.

[0059] In this embodiment, a method for assembling a connection structure is further provided, such as Figure 1 、7 , 9, 10, 12, 13 and 14, since the second connecting structure is connected to the mounting ring 911 and corresponds to each connecting fastener 8 and the connecting buckle slot plate one by one, when the driving motor 914 is working, it can drive the gear 913 to rotate, and under the meshing transmission action of the outer gear ring 912 and the gear 913, it can further drive the mounting ring 911 to slightly deflect, so that the second connecting structure is plugged into the first connecting structures 7 around the tip of the original blade body 111 in the deflection direction. Specifically, as shown in Figures 12 to 9 In this state, several clips 812 on the support rod 811 enter the open groove 712 on the card plate 711, and the limit blocks 813 distributed above and below each clip 812 are placed on the upper and lower surfaces of the card plate 711, and the corresponding pressing slot plate components enter the interior of the installation frame 721 and are placed under the pressing transmission mechanism, thereby realizing the pre-assembly of the original blade body 111 and the newly connected extended blade 1011.

[0060] Example 5

[0061] By further setting the buckling slot plate assembly and the buckling transmission mechanism, a more prominent implementation method is extended. Furthermore, the buckling slot plate assembly includes a mounting bar 816, the mounting bar 816 is L-shaped, and the long section where the mounting bar 816 is located is sequentially provided with a through groove 818 and a second barbed tooth 817, and the second barbed tooth 817 decreases in length step by step from the end of the mounting bar 816 to the inside.

[0062] Furthermore, the buckling transmission mechanism includes a first movable frame 723 and a second movable frame 732 which are relatively mounted inside the mounting frame 721 and can slide horizontally. A lifting frame 725 which can slide up and down is installed horizontally between the first movable frame 723 and the second movable frame 732. A transmission rod 724 is hinged between the bottom of one side of the lifting frame 725 and the mounting frame 721. The lifting frame 725 is rectangular in shape, and a rocker 727 is mounted on both sides of the end of the lifting frame 725 by a pin. A plurality of first barbed teeth 72 are provided between the two rocker 727. 6. A plurality of first barbed teeth 726 decrease in number from the end of the rocker arm 727 to the inside; a rack 731 is fixedly mounted on the second movable frame 732, and a transmission wheel 730 is arranged on the pin shaft where the rocker arm 727 is located. The transmission wheel 730 is engaged with the rack 731 for transmission, and is used for self-deflection when the first barbed teeth 726 descend; and a pneumatic push rod assembly is arranged on the clamp ring 613, which is used to drive the operation of a plurality of buckling transmission mechanisms; and a channel 7231 is opened on the side wall of the first movable frame 723 for the entry of the buckling slot plate assembly.

[0063] In an embodiment, Figure 9 、 10 , 11, 13 and 15, when the buckling transmission mechanism is running, specifically, as Figure 15As shown, the corresponding first movable frame 723 and second movable frame 732 move toward the direction close to the column 729. Under the connection action of the transmission rod 724, the lifting frame 725 has a downward and leftward movement. Further, since the rocker arm 727 rotates on the lifting frame 725, the lifting frame 725 moves up and down, so that the transmission wheel 730 engages and transmits downward along the fixed rack 731, thereby driving the rocker arm 727 to deflect downward, and then the first barb tooth 726 is inserted into the second barb tooth 817 to form a further barb anti-slip structure.

[0064] Furthermore, the pneumatic push rod assembly includes a mounting tube 512 fixed on the clamp ring 613, and a hydraulic device 511 fixed on the vertical plate 611. The output end of the hydraulic device 511 is connected to the mounting tube 512 through a connecting tube 514, and a plurality of push rod bodies 513 are connected to the mounting tube 512. The execution end of each push rod body 513 is connected to a cross bar 728. The end of the cross bar 728 acts on the first movable frame 723 to drive the first movable frame 723 to move toward the direction close to the original blade body 111, and is used to perform a clamping action on the clamping transmission mechanism and the clamping slot plate assembly.

[0065] The pneumatic push rod assembly is provided as a driving source for the extension and contraction of the push rod bodies 513, such as Figure 3 and 5 As shown, due to the control of the hydraulic device 511, the installation pipe 512 is made of steel pipe material and is connected to a plurality of push rod bodies 513. When the hydraulic device 511 works, it can drive the plurality of push rod bodies 513 to extend and retract together, thereby controlling the operation of the buckling transmission mechanism.

[0066] Furthermore, an insertion rod 830 is fixed vertically downward near the end of the rocker rod 727 of the lifting frame 725, and a through slot 818 is provided on the mounting bar 816. The insertion rod 830 can be inserted into the through slot 818 and drive the mounting bar 816 to move toward the direction close to the original blade body 111, thereby allowing the clip 812 on the connecting fastener 8 to enter the clip slot 713 where the connecting buckle slot plate is located and finally complete the locking action.

[0067] Under this structure, if Figure 10 、 12 As shown in Figures 15 and 16, the lifting frame 725 enables the insertion rod 830 to move downward and leftward. When the insertion rod 830 enters the through slot 818 and abuts against its left end, it can drive the mounting bar 816 to move as a whole toward the original blade body 111. On the one hand, the first barbed tooth 726 and the second barbed tooth 817 are further in contact with each other after insertion. On the other hand, due to the movement of the mounting bar 816, the second connecting structure as a whole can be further driven to move toward the original blade body 111. Figure 7 、 9As shown in FIG12, the connection between the newly connected extended blade 1011 and the original blade body 111 is tighter, and the card 812 is enabled to enter the card slot 713, that is, the card 812 on the connecting fastener 8 enters the card slot 713 where the connecting buckle slot plate is located and finally completes the locking action. In summary, under various structures, the stability and safety of the extended part of the original blade body 111 and the newly connected extended blade 1011 are guaranteed, and the tightness of the connection is also greatly improved. Figure 4 、 6 As shown, a rubber sealing layer is provided inside the open end of the connecting portion 1012, which improves the sealing performance of the cavity formed between the connecting portion 1012 and the tip of the original blade body 111, thereby reducing the possibility of leakage when injecting epoxy resin.

[0068] A method for extending a wind turbine blade is applied to the aforementioned blade tip extension structure based on the wind turbine blade, and the extension method comprises:

[0069] S1: drilling a hole at the tip of the original blade body to form an assembly hole that runs through the blade body, and assembling the opening and closing clamp assembly to the original blade body using a stud assembly assembly;

[0070] S2: operating the opening and closing hoop assembly to surround the original blade body in a closed manner and distribute the plurality of first connecting structures around the tip of the original blade body;

[0071] S3: Utilize the second connecting structure on the open end of the newly connected extended blade. When the newly connected extended blade is docked with the original blade body, the first connecting structure and the second connecting structure are docked, so that the connection part at the front end of the newly connected extended blade completely covers the front end of the original blade body. Utilize the provided injection port to inject adhesive into the cavity area where the two are connected to form an extended connecting section.

[0072] In the present invention, unless otherwise clearly specified and limited, terms such as "install", "connect", "connect", and "fix" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection. There are many ways of detachable installation, for example, it can be through plug-in and snap-fit, or through bolt connection, etc.

[0073] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above invention, which fall within the scope of protection of the present invention.

Claims

1. A blade tip extension structure based on a wind turbine blade, characterized in that: include: An original blade body (111), and an assembly hole (113) penetrating the tip of the original blade body (111); and a stud assembly component (4), wherein the stud assembly component (4) is provided with an opening and closing hoop component (6), and a plurality of first connection structures (7) are distributed on the opening and closing hoop component (6); When the stud assembly component (4) is assembled with the assembly hole (113), the opening and closing hoop component (6) is operated to surround the original blade body (111) in a closed manner and enables the first connection structures (7) to be distributed around the tip of the original blade body (111); It also includes a newly connected extended blade (1011) and a second connection structure arranged on the open end of the newly connected extended blade (1011), wherein the second connection structure can be connected to the first connection structure (7) around the original blade body (111) to achieve pre-assembly of the newly connected extended blade (1011) and the original blade body (111); A connecting portion (1012) is also provided on the front side of the open end of the newly connected extended blade (1011), and an injection port (1013) is provided on the connecting portion (1012). After the newly connected extended blade (1011) is pre-assembled with the original blade body (111), the opening edge of the connecting portion (1012) is wrapped around the front end of the original blade body (111), and the injection port (1013) can be used to inject adhesive.

2. The blade tip extension structure based on a wind turbine blade according to claim 1 is characterized in that: The stud assembly component (4) comprises a column (411), and an end cap (414) arranged at the bottom end of the column (411), a second gasket (413) is sleeved on the outer wall of the column (411) above the end cap (414), and a thread groove (412) is opened on the upper part of the column (411); The threaded groove (412) is threadedly connected with a nut (416); an outer wall of the threaded groove (412) below the nut (416) is sleeved with an assembly block (415); and the opening and closing hoop assembly (6) is assembled on the assembly block (415); and a first gasket (112), wherein the first gasket (112) can act on the end of the assembly hole (113) to support the bottom of the assembly block (415) and to firmly lock the assembly block (415).

3. The blade tip extension structure based on a wind turbine blade according to claim 1 is characterized in that: The opening and closing hoop assembly (6) comprises a vertical plate (611) fixed on the assembly block (415); a hoop ring (613) is installed at the lower part of the vertical plate (611) through an axle seat (615); the hoop ring (613) is enlarged in proportion to the cross section of the vertical plate (611) at this position and wrapped around the outer wall of the vertical plate (611); and a limiting arc groove (616) is provided on the hoop ring (613); and a limiting long groove (612) provided on the vertical plate (611), wherein an electric telescopic rod is arranged inside the limiting long groove (612), and a mounting block (618) is installed at the output end of the electric telescopic rod, and a limiting column (614) is installed horizontally on the mounting block (618), and the limiting column (614) extends into the limiting arc groove (616) and slides with the limiting arc groove (616) in a limited manner, and when the mounting block (618) moves up and down in the limiting long groove (612), the limiting column (614) can move inside the limiting arc groove (616), thereby driving the clamp ring (613) to deflect around the shaft seat (615).

4. The blade tip extension structure based on a wind turbine blade according to claim 1 is characterized in that: Each of the first connection structures (7) comprises a support block (720) and a mounting frame (721) fixed to the support block (720), wherein a buckling transmission mechanism is arranged inside the mounting frame (721); and a connecting buckle slot plate connected to the installation frame (721), the connecting buckle slot plate comprising a first connecting member (714), an end of the first connecting member (714) away from the installation frame (721) being connected to a clamping plate (711), the clamping plate (711) being provided with a plurality of open slots (712) and a clamping slot (713) vertically connected to the installation frame (721).

5. The blade tip extension structure based on a wind turbine blade according to claim 4 is characterized in that: The second connection structure comprises a rotatable mounting ring (911) mounted on the newly connected extended blade (1011), and a plurality of connecting fasteners (8) distributed on the mounting ring (911), each of the connecting fasteners (8) corresponding to a connecting fastener slot plate one by one; The connecting fastener (8) comprises a support rod (811) and a plurality of clamping members (812) fixed on the support rod (811) in a linear array, wherein the clamping member (812) is in an L-shaped structure, and a plurality of limiting blocks (813) are arranged on the vertical section of the clamping member (812) for limiting the engagement of the clamping slot (713); and a second connecting member (814) arranged at the end of the support rod (811) away from the mounting ring (911), wherein the second connecting member (814) is fixedly connected to a buckling slot plate assembly via a connecting block (815) and is used for buckling with the buckling transmission mechanism; The invention also comprises an extension plate (915) arranged on the newly connected extended blade (1011), a driving motor (914) being installed on the extension plate (915), an output end of the driving motor (914) passing through the extension plate (915) and being fixedly connected to a gear (913), and an outer toothed ring (912) arranged on the outer wall of the mounting ring (911), the outer toothed ring (912) being meshed with the gear (913) for transmission, and when the extension plate (915) is in operation, it is used to drive the mounting ring (911) to rotate, so that each of the connection fasteners (8) is connected to the connection buckle slot plate one by one, and at the same time, the buckle slot plate assembly enters the interior of the mounting frame (721) and is placed below the buckle transmission mechanism.

6. The blade tip extension structure based on a wind turbine blade according to claim 5 is characterized in that: The buckling slot plate assembly comprises a mounting strip (816), wherein the mounting strip (816) is L-shaped, and a long section where the mounting strip (816) is located is provided with a through slot (818) and a second barbed tooth (817) in sequence, wherein the length of the second barbed tooth (817) decreases gradually from the end of the mounting strip (816) toward the inside.

7. The blade tip extension structure based on a wind turbine blade according to claim 6 is characterized in that: The buckling transmission mechanism comprises a first movable frame (723) and a second movable frame (732) which are relatively installed inside the installation frame (721) and can slide horizontally, a lifting frame (725) which can slide up and down is installed horizontally between the first movable frame (723) and the second movable frame (732), and a transmission rod (724) is hinged between the bottom of one side of the lifting frame (725) and the installation frame (721); The lifting frame (725) is in a rectangular frame shape, and the swing rods (727) are rotatably mounted on both sides of the end of the lifting frame (725) through a pin shaft, and a plurality of first barbed teeth (726) are arranged between the two swing rods (727), and the plurality of first barbed teeth (726) decreases step by step from the end of the swing rod (727) to the inside; The second movable frame (732) is fixedly mounted with a rack (731) and a transmission wheel (730) arranged on the pin shaft where the swing rod (727) is located, and the transmission wheel (730) is meshed with the rack (731) for transmission, so as to deflect the first barbed tooth (726) when it descends; and a pneumatic push rod assembly arranged on the clamp ring (613), used for driving a plurality of buckling transmission mechanisms to operate; And a channel (7231) is provided on the side wall of the first movable frame (723) for the entry of the buckling slot plate assembly.

8. The blade tip extension structure based on a wind turbine blade according to claim 7 is characterized in that: The pneumatic push rod assembly comprises a mounting tube (512) fixed on a clamp ring (613), and a hydraulic device (511) fixed on a vertical plate (611); the output end of the hydraulic device (511) is connected to the mounting tube (512) via a connecting tube (514); and a plurality of push rod bodies (513) are connected to the mounting tube (512); the execution end of each push rod body (513) is connected to a cross bar (728); the end of the cross bar (728) acts on the first movable frame (723) to drive the first movable frame (723) to move in a direction close to the original blade body (111), so as to enable the buckling transmission mechanism and the buckling slot plate assembly to perform a buckling action.

9. The tip extension structure based on a wind turbine blade according to claim 7 is characterized in that: The lifting frame (725) is fixed with an insertion rod (830) vertically downward near the end of the swing rod (727), and a through slot (818) is provided on the installation strip (816). The insertion rod (830) can be inserted into the through slot (818) and drive the installation strip (816) to move toward the original blade body (111), thereby allowing the clamping piece (812) on the connecting fastener (8) to enter the clamping slot (713) where the connecting fastener slot plate is located and finally complete the locking action.

10. A method for extending a wind turbine blade, applied to the tip extension structure based on a wind turbine blade according to any one of claims 1 to 9, characterized in that: The extension method comprises: S1: drilling a hole at the tip of the original blade body to form an assembly hole that runs through the upper and lower parts, assembling the assembly with studs, and assembling the opening and closing hoop assembly to the original blade body; S2: operating the opening and closing hoop assembly to surround the original blade body in a closed manner and to distribute the plurality of first connection structures around the tip of the original blade body; S3: Utilizing the second connection structure on the open end of the newly connected extended blade, when the newly connected extended blade is docked with the original blade body, the first connection structure and the second connection structure are docked, so that the connection portion at the front end of the newly connected extended blade completely covers the front end of the original blade body, and utilizing the provided injection port to inject adhesive into the cavity area where the two are connected to form an extended connection section.

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