A wind turbine blade extension connection device

Abstract

This invention relates to the field of wind turbine technology, and in particular to a wind turbine blade extension connection device, comprising: a wind turbine, including a frame, a connector disposed on the frame, a wind blade connected to the connector, and an extension blade corresponding to the wind blade; a connection mechanism, including a plug block connected to the extension blade, an installation groove formed in the plug block, and a plug groove formed on the wind blade. By inserting the plug block into the plug groove, two first locking components and a spring component cooperate with each other to achieve a quick connection between the wind blade and the extension blade. Furthermore, through the reinforcement component and the deadlock component, not only is the sealing performance of the connection between the wind blade and the extension blade increased, but the first locking component and the second locking component are also locked, increasing the stability of the connection between the wind blade and the extension blade and avoiding the possibility of unlocking when the wind blade and the extension blade are shaken.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a wind turbine blade extension connection device. Background Technology

[0002] Due to limitations such as the insufficient representativeness of the wind measurement tower located outside the site, the relatively outdated wind resource assessment technology and software during construction, the differences in topography between the wind farm construction period and the feasibility study design period, and the varying degrees of differences in the situation of wind speed reduction in the second phase caused by wake and wind speed absorption of surrounding wind farms, there are certain deviations in the accuracy of wind resource assessment and the selection of turbine models, especially the selection of blade length. This has resulted in the relatively small rotor diameter of the current turbine units, leading to low overall investment efficiency for some wind farm units and some units falling below the break-even point.

[0003] In existing technologies, when the blades of some wind turbine units are extended, the extended portion is connected to the blade with bolts. However, due to the influence of wind, the bolts are prone to loosening over time, causing the extended portion of the blade to fall off. In other cases, when connecting blades, it is necessary to first cut the original blade, mark the clamping position, fix it with a tooling positioning plate, and then prepare adhesive. The adhesive is weighed according to the standard ratio, mixed evenly, and then connected with adhesive. The whole process is quite cumbersome. Therefore, a wind turbine unit blade extension connection device is needed. Summary of the Invention

[0004] Given that the above-mentioned or existing technologies involve connecting the extended section to the blade with bolts, but due to the influence of wind, the bolts are prone to loosening over time, causing the extended section of the blade to fall off. In addition, some blades require cutting the original blade first, marking the clamping position, fixing it with a tooling positioning plate, preparing adhesive, weighing the adhesive according to the standard ratio, mixing it evenly, and then connecting it with adhesive, which is a rather cumbersome process, this invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a wind turbine blade extension connection device.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including,

[0007] A wind turbine for generating electricity includes a frame, a joint disposed on the frame, a blade connected to the joint, and an extended blade corresponding to the blade.

[0008] The connecting mechanism includes a plug-in block connected to the extended blade, a mounting groove formed in the plug-in block, a plug-in groove formed on the fan blade, two first locking components disposed between the plug-in block and the plug-in groove, an elastic component and a reinforcing component disposed inside the mounting groove, a second locking component connected to the reinforcing component, and a deadlock component corresponding to the reinforcing component.

[0009] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the first locking component includes a support plate disposed inside the mounting groove, a first protrusion block connected to the support plate, a first inclined surface disposed on the first protrusion block, a limiting block disposed inside the insertion groove, and a second inclined surface disposed on the limiting block.

[0010] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the elastic component includes a groove formed inside the plug block, two sliders disposed inside the groove, and a first spring disposed between the two sliders.

[0011] The two sliders are respectively connected to the two support plates, and both the groove and the slider are trapezoidal.

[0012] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the reinforcing component includes a telescopic member connected to the inner wall of the mounting groove, a second spring sleeved on the telescopic member, a pressure block connected to the telescopic member and the second spring, a third inclined surface on the pressure block, and a fourth inclined surface on the support plate.

[0013] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the second locking component includes a locking block connected to the pressure block, a fifth inclined surface disposed on the locking block, a first spring piece connected to the inner wall of the mounting groove, a second protruding block connected to the first spring piece, and a sixth inclined surface disposed on the second protruding block.

[0014] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the telescopic component includes a sleeve connected to the inner wall of the mounting groove, a sliding plate slidably disposed inside the sleeve, a vertical rod connected to the sliding plate, and the end of the vertical rod away from the sliding plate passing through the sleeve and connected to the pressure block.

[0015] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the deadlock assembly includes a plug rod, a pressing head connected to the plug rod, a first fixing groove formed on the wind blade, and a second fixing groove formed on the plug block, wherein the second fixing groove communicates with the mounting groove.

[0016] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the top of the pressing head is arc-shaped and corresponds to the blade surface of the wind turbine blade.

[0017] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the deadlock assembly further includes a seventh inclined surface provided on the insertion rod, an eighth inclined surface provided on the pressure block, and a sealing ring provided on the extended blade.

[0018] As a preferred embodiment of the wind turbine blade extension connection device of the present invention, the deadlock assembly further includes a storage groove formed on the insertion rod, a second spring piece disposed inside the storage groove, a deadlock block connected to the second spring piece, and a ninth inclined surface disposed on the deadlock block.

[0019] The beneficial effects of the wind turbine blade extension connection device of the present invention are as follows: by inserting the plug block into the plug slot, the two first locking components and the elastic component cooperate with each other to achieve a quick connection between the wind turbine blade and the extended blade. Furthermore, the stability of the locking of the two first locking components is further increased by the reinforcement component and the second locking component. The deadlock component not only increases the sealing performance when the wind turbine blade and the extended blade are connected, but also locks the first locking component and the second locking component, increasing the stability of the connection between the wind turbine blade and the extended blade and avoiding the possibility of unlocking when the wind turbine blade and the extended blade are shaken. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall connection device for extending the blades of a wind turbine unit.

[0022] Figure 2 This is a schematic diagram of the structure of the wind turbine blade extension connection device after the blades and the extension blades are separated.

[0023] Figure 3 Extended connecting device for wind turbine blades Figure 2 A magnified structural diagram of position A.

[0024] Figure 4 A schematic diagram of the overall structure of the deadlock assembly for the blade extension connection device of a wind turbine unit.

[0025] Figure 5A schematic diagram of the front cross-section of the connection mechanism for the wind turbine blade extension connection device.

[0026] Figure 6 A top-view cross-sectional schematic diagram of the connection mechanism for the wind turbine blade extension connection device.

[0027] Figure 7 Extended connecting device for wind turbine blades Figure 6 A magnified structural diagram of position B.

[0028] Figure 8 Extended connecting device for wind turbine blades Figure 6 A magnified structural diagram of position C. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1, referring to Figures 1 to 7This is the first embodiment of the present invention, which provides a wind turbine blade extension connection device, comprising a wind turbine 100, including a frame 101, a connector 102 disposed on the frame 101, a plurality of wind blades 103 connected to the connector 102, the plurality of wind blades 103 being arranged in a ring at equal intervals, and a plurality of extended blades 104 corresponding to the plurality of wind blades 103 respectively. Each extended blade 104 is connected to a wind blade 103 through a connecting mechanism 200. The connecting mechanism 200 includes a plug-in block 201 connected to the extended blade 104, a mounting groove 202 formed in the plug-in block 201, a plug-in groove 203 formed on the wind blade 103, two first locking components 204 disposed between the plug-in block 201 and the plug-in groove 203, and an elastic component 205 and a reinforcing component 206 disposed inside the mounting groove 202. The two first locking components 204 are connected by a connecting mechanism 200. The first locking components 204 and the extended blade 104 are connected by the elastic component 205, the second locking component 207 connected to the reinforcement component 206, and the deadlock component 208 corresponding to the reinforcement component 206. By inserting the plug block 201 into the plug slot 203, the two first locking components 204 and the elastic component 205 cooperate with each other to achieve a quick connection between the fan blade 103 and the extended blade 104. The reinforcement component 206 and the second locking component 207 further increase the stability of the locking of the two first locking components 204. The deadlock component 208 not only increases the sealing when the fan blade 103 and the extended blade 104 are connected, but also locks the first locking components 204 and the second locking component 207, increasing the stability of the connection between the fan blade 103 and the extended blade 104 and avoiding the possibility of unlocking when the fan blade 103 and the extended blade 104 are shaken.

[0033] Specifically, the first locking component 204 includes a support plate 204a disposed inside the mounting groove 202, two first protrusions 204b connected to the support plate 204a, the two first protrusions 204b being located at opposite ends of the support plate 204a, and each of the two first protrusions 204b having a first inclined surface 204c, and two limiting blocks 204d fixedly disposed inside the insertion groove 203. In the initial state, the opposite sides of the first protrusions 204b and the limiting blocks 204d are both flat surfaces. Both limiting blocks 204d are provided with a second inclined surface 204e, which corresponds to the first inclined surface 204c. When the insertion block 201 is inserted into the mounting groove 202, the first inclined surface 204c on the first protruding block 204b contacts the second inclined surface 204e on the first limiting block 204d, thereby causing the first protruding block 204b to move towards the center of the mounting groove 202. The two support plates 204a compress the elastic component 205. When the first protruding block 204d... When the first inclined surface 204c on 4b does not contact the second inclined surface 204e on the limiting block 204d, under the action of the elastic component 205, the first protruding block 204b resets, and the plane of the first protruding block 204b contacts the plane of the limiting block 204d, preventing the insertion block 201 from being pulled out of the insertion slot 203. At this time, it is possible to test whether the fan blade 103 can be used normally after the extended blade 104 is installed. If it can be pushed further, the second first protruding block 204b... It is also moved to the appropriate position and locked in place with the limiting block 204d. If this does not work, the second first protrusion 204b is pressed by hand. The second first protrusion 204b moves the first first protrusion 204b into the mounting groove 202 through the support plate 204a, so that the first first protrusion 204b is not locked with the first limiting block 204d, and the connection between the plug block 201 and the plug groove 203 is released, thereby releasing the connection between the fan blade 103 and the extended blade 104.

[0034] Specifically, the elastic component 205 includes a groove 205a formed inside the insertion block 201, two sliders 205b disposed inside the groove 205a, and a first spring 205c disposed between the two sliders 205b. The two sliders 205b are respectively connected to two support plates 204a. The groove 205a and the sliders 205b are both trapezoidal. Under the influence of the first inclined surface 204c and the second inclined surface 204e, the two support plates 204a move towards the center inside the mounting groove 202. The two support plates 204a drive the two sliders 205b to slide inside the groove 205a, and the two sliders 205b compress the first spring 205c. This causes the first spring 205c to contract. When the first inclined surface 204c is not in contact with the second inclined surface 204e, the two sliders 205b return to their original positions under the elastic force of the first spring 205c. The two sliders 205b drive the two sliding plates to return to their original positions, and the two sliding plates drive the two support plates 204a and the first protrusion 204b to return to their original positions. Since both the groove 205a and the sliders 205b are trapezoidal, the connection between the support plate 204a and the plug block 201 is ensured, as well as the stability of the movement of the support plate 204a and the sliders 205b. At the same time, it also avoids the possibility of tilting and squeezing the first spring 205c, which could damage the first spring 205c.

[0035] In use, by inserting the plug-in block 201 into the mounting groove 202, the first protrusion 204b moves towards the center of the mounting groove 202 with the cooperation of the first inclined surface 204c on the first protrusion 204b and the second inclined surface 204e on the limiting block 204d. The two support plates 204a compress the first spring 205c through the two sliders 205b, causing the first spring 205c to contract. When the first inclined surface 204c on the first protrusion 204b is not in contact with the second inclined surface 204e on the limiting block 204d, the first protrusion 204b returns to its original position under the elastic force of the first spring 205c. The plane of the first protrusion 204b then contacts the plane of the limiting block 204d, preventing the plug-in block 201 from being pulled out of the plug-in groove 203, thereby connecting the fan blade 103 and the extended blade 104.

[0036] Example 2, refer to Figures 2-7This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a wind turbine blade extension connection device. Its reinforcing component 206 includes a telescopic member 206a fixedly connected to the inner wall of the mounting groove 202, and a second spring 206b sleeved on the telescopic member 206a. The telescopic member 206a ensures the stability of the second spring 206b. The ends of the telescopic member 206a and the second spring 206b furthest from the inner wall of the mounting groove 202 are both connected to a pressure block 206c. Two third inclined surfaces 206d are provided on the pressure block 206c, located at opposite ends of the pressure block 206c. Both support plates 204a also have... A fourth inclined surface 206e is provided, and two fourth inclined surfaces 206e correspond to two third inclined surfaces 206d respectively. The deadlock assembly 208 moves downward and contacts the pressure block 206c, causing the pressure block 206c to move downward. The third inclined surface 206d on the pressure block 206c presses the fourth inclined surface 206e on the support plate 204a, causing the two support plates 204a to move away from each other, increasing the stability of the connection between the first protruding block 204b and the limiting block 204d, thereby increasing the stability of the connection between the insertion block 201 and the insertion slot 203. At the same time, the pressure block 206c presses the second spring 206b, causing the second spring 206b to contract.

[0037] Specifically, the second locking assembly 207 includes a locking block 207a fixedly connected to the pressure block 206c, a fifth inclined surface 207b disposed on the locking block 207a, a first spring piece 207c fixedly connected to the inner wall of the mounting groove 202, the first spring piece 207c being vertically arranged, a second protruding block 207d connected to the first spring piece 207c, and a sixth inclined surface 207e disposed on the second protruding block 207d. The sixth inclined surface 207e corresponds to the fifth inclined surface 207b. When the pressure block 206c moves downward, the pressure block 206c drives the locking block 207a to move downward. The locking block 207a presses the sixth inclined surface 207a on the second protruding block 207d through the fifth inclined surface 207b. e, thereby causing the second protruding block 207d to drive the first spring piece 207c to rotate. When the fifth inclined surface 207b does not contact the sixth inclined surface 207e on the second protruding block 207d, the second protruding block 207d is reset under the action of the elastic force of the first spring piece 207c. Thus, with the cooperation of the locking block 207a and the second protruding block 207d, the pressure block 206c is locked. Under this condition, the pressure block 206c cannot be unlocked, that is, the two support plates 204a and the first protruding block 204b on the support plate 204a cannot move towards the center of the mounting groove 202, thereby causing the plug-in block 201 and the plug-in groove 203 to lock, that is, the fan blade 103 and the extended blade 104 to lock.

[0038] Specifically, the telescopic component 206a includes a sleeve 206a-1 fixedly connected to the inner wall of the mounting groove 202, a sliding plate 206a-2 slidably disposed inside the sleeve 206a-1, and a vertical rod 206a-3 fixedly connected to the top of the sliding plate 206a-2. One end of the vertical rod 206a-3 away from the sliding plate 206a-2 extends out of the sleeve 206a-1 and is fixedly connected to the side of the pressure block 206c near the sleeve 206a-1. When the pressure block 206c is squeezed by the deadlock assembly 208, it moves towards the sleeve 206a-1. When moving in direction 1, the pressure block 206c drives the upright rod 206a-3 to move into the sleeve 206a-1. The upright rod 206a-3 drives the sliding plate 206a-2 to move towards the inner wall of the sleeve 206a-1. When the locking block 207a and the second protruding block 207d cooperate to lock the pressure block 206c, the sliding plate 206a-2 contacts the inner wall of the sleeve 206a-1. The sliding plate 206a-2 abuts against the pressure block 206c through the upright rod 206a-3, thus... The first spring 207c and the second protrusion 207d merely serve as a limit for the pressure block 206c, preventing the first spring 207c from being compressed by the pressure block 206c for an extended period, thus avoiding rapid loss of elasticity and affecting the pressure block 206c's ability to compress the support plate 204a. Although the second spring 206b is still compressed in this state, and its elasticity will quickly dissipate, the second spring 206b initially only serves to support the pressure block 206c. At the same time, it ensures that the pressure block 206c is not locked with the second protrusion 207d, thereby affecting the first protrusion 204b and the limiting block 204d to lock the insertion block 201 and the insertion slot 203. When the pressure block 206c is locked, the second spring 206b will exert a pushing force on the pressure block 206c. This pushing force will affect the pressure block 206c pressing the support plate 204a to a certain extent. By quickly consuming the elastic force of the second spring 206b in this way, the impact on the pressure block 206c pressing the support plate 204a can be reduced.

[0039] Specifically, the deadlock assembly 208 includes a plug rod 208a, a pressing head 208b connected to the plug rod 208a, a first fixing groove 208j opened on the fan blade 103, and a second fixing groove 208k opened on the plug block 201. The second fixing groove 208k communicates with the mounting groove 202. The plug rod 208a passes through the first fixing groove 208j and the second fixing groove 208k and presses the pressing block 206c.

[0040] Specifically, the top of the pressing head 208b is arc-shaped and corresponds to the blade surface of the wind blade 103. By setting the pressing head 208b to an arc shape corresponding to the blade surface of the wind blade 103, the wind resistance of the wind blade 103 when rotating is reduced, and the power generation is increased.

[0041] The rest of the structure is the same as in Example 1.

[0042] In summary, the insertion rod 208a presses the pressure block 206c into contact, and the pressure block 206c presses the fourth inclined surface 206e on the support plate 204a through the third inclined surface 206d, causing the two support plates 204a to move away from each other. This increases the stability of the connection between the first protruding block 204b and the limiting block 204d, thereby increasing the stability of the connection between the insertion block 201 and the insertion slot 203. At the same time, the pressure block 206c drives the locking block 207a to move downward, and the locking block 207a presses the second protruding block 206e through the fifth inclined surface 207b. When the fifth inclined surface 207b is not in contact with the sixth inclined surface 207e on the second protruding block 207d, the second protruding block 207d is reset under the elastic force of the first spring piece 207c. Thus, with the cooperation of the locking block 207a and the second protruding block 207d, the plug-in block 201 and the plug-in slot 203 are locked, that is, the fan blade 103 and the extended blade 104 are locked, avoiding the possibility of unlocking when the fan blade 103 and the extended blade 104 are shaken.

[0043] Example 3, referring to Figures 2-8 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a wind turbine blade extension connection device. The deadlock assembly 208 also includes a seventh inclined surface 208c provided on the insertion rod 208a, an eighth inclined surface 208d provided on the pressure block 206c, and a sealing ring 208e provided on the extended blade 104. Multiple storage slots 208f are opened on the insertion rod 208a. The multiple storage slots 208f are distributed in a ring at equal intervals. Each storage slot 208f is provided with a second spring piece 208g inside. Each second spring piece 208g is connected to the deadlock block 208h and a ninth inclined surface 208i provided on the deadlock block 208h.

[0044] When the insert rod 208a contacts the pressure block 206c, it will cause the pressure block 206c to squeeze the second spring 206b and simultaneously squeeze the eighth inclined surface 208d of the pressure block 206c through the seventh inclined surface 208c. This causes the pressure block 206c to move the insert block 201 into the insert groove 203 through the telescopic member 206a. With the side obstruction of the fan blade 103, the insert block 201 drives the extended blade 104 to squeeze the sealing ring 208e, ensuring the sealing between the extended blade 104 and the fan blade 103 after connection. This prevents rainwater from entering the insert groove 203 and the insert block 201 from the gap at the connection between the extended blade 104 and the fan blade 103, causing corrosion of the device and reducing its lifespan. In this case, the second fixing groove 208k is elliptical, matching the distance the insert block 201 moves. The setting of the seventh inclined surface 208c also facilitates the insertion of the insert rod 208a into the first fixing groove 208j.

[0045] When the insertion rod 208a is inserted into the first fixing groove 208j, the ninth inclined surface 208i on the locking block 208h contacts the groove surface of the first fixing groove 208j, causing multiple locking blocks 208h to move into the receiving groove 208f. The multiple locking blocks 208h compress the corresponding second spring pieces 208g, causing the multiple second spring pieces 208g to deform. When the insertion rod 208a moves to the appropriate position, the second spring 206b exerts its elastic force... Under the action of the locking block 208h, one end of the locking block 208h abuts against the inner wall of the mounting groove 202, and the other end abuts against the inside of the storage groove 208f. With the cooperation of the pressing head 208b, the locking of the plug rod 208a is ensured. At the same time, the plug rod 208a also limits the plug block 201, preventing the plug block 201 from disengaging from the plug groove 203, and further preventing the possibility of unlocking when the fan blade 103 and the extended blade 104 are shaken.

[0046] The rest of the structure is the same as in Example 2.

[0047] In use, the seventh inclined surface 208c on the insertion rod 208a presses the eighth inclined surface 208d of the pressure block 206c. With the side obstruction of the fan blade 103, the pressure block 206c drives the extended blade 104 to compress the sealing ring 208e through the insertion block 201, ensuring the sealing between the extended blade 104 and the fan blade 103 after connection. When the insertion rod 208a moves to the appropriate position, the deadlock block 208h resets under the action of the elastic force of the second spring 206b, so that one end of the deadlock block 208h abuts against the inner wall of the mounting groove 202 and the other end abuts against the inside of the storage groove 208f. With the cooperation of the pressing head 208b, the insertion rod 208a is locked.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A blade extension connection device for a wind turbine unit, characterized in that: include, A wind turbine (100) includes a frame (101), a connector (102) provided on the frame (101), a fan blade (103) connected to the connector (102), and an elongated blade (104) corresponding to the fan blade (103). The connecting mechanism (200) includes a plug-in block (201) connected to the extended blade (104), a mounting groove (202) opened in the plug-in block (201), a plug-in groove (203) opened on the fan blade (103), two first locking components (204) disposed between the plug-in block (201) and the plug-in groove (203), an elastic component (205) and a reinforcing component (206) disposed inside the mounting groove (202), a second locking component (207) connected to the reinforcing component (206), and a deadlock component (208) corresponding to the reinforcing component (206). The first locking component (204) includes a support plate (204a) disposed inside the mounting groove (202), a first protrusion (204b) connected to the support plate (204a), a first inclined surface (204c) disposed on the first protrusion (204b), a limiting block (204d) disposed inside the insertion groove (203), and a second inclined surface (204e) disposed on the limiting block (204d). The elastic component (205) includes a groove (205a) formed inside the plug block (201), two sliders (205b) disposed inside the groove (205a), and a first spring (205c) disposed between the two sliders (205b). The two sliders (205b) are respectively connected to the two support plates (204a), and both the groove (205a) and the sliders (205b) are trapezoidal; The reinforcing component (206) includes a telescopic member (206a) connected to the inner wall of the mounting groove (202), a second spring (206b) sleeved on the telescopic member (206a), a pressure block (206c) connected to the telescopic member (206a) and the second spring (206b), a third inclined surface (206d) provided on the pressure block (206c), and a fourth inclined surface (206e) provided on the support plate (204a). The second locking component (207) includes a locking block (207a) connected to the pressure block (206c), a fifth inclined surface (207b) disposed on the locking block (207a), a first spring piece (207c) connected to the inner wall of the mounting groove (202), a second protrusion (207d) connected to the first spring piece (207c), and a sixth inclined surface (207e) disposed on the second protrusion (207d).

2. The wind turbine blade extension connection device as described in claim 1, characterized in that: The telescopic component (206a) includes a sleeve (206a-1) connected to the inner wall of the mounting groove (202), a sliding plate (206a-2) slidably disposed inside the sleeve (206a-1), and a vertical rod (206a-3) connected to the sliding plate (206a-2). One end of the vertical rod (206a-3) away from the sliding plate (206a-2) extends out of the sleeve (206a-1) and is connected to the pressure block (206c).

3. The wind turbine blade extension connection device as described in claim 2, characterized in that: The deadlock assembly (208) includes a plug (208a), a pressing head (208b) connected to the plug (208a), a first fixing groove (208j) opened on the fan blade (103), and a second fixing groove (208k) opened on the plug block (201), the second fixing groove (208k) communicating with the mounting groove (202).

4. The wind turbine blade extension connection device as described in claim 3, characterized in that: The top of the pressing head (208b) is arc-shaped and corresponds to the blade surface of the fan blade (103).

5. The wind turbine blade extension connection device as described in claim 3 or 4, characterized in that: The deadlock assembly (208) also includes a seventh inclined surface (208c) provided on the insert (208a), an eighth inclined surface (208d) provided on the pressure block (206c), and a sealing ring (208e) provided on the extended blade (104).

6. The wind turbine blade extension connection device as described in claim 5, characterized in that: The deadlock assembly (208) further includes a storage groove (208f) formed on the insertion rod (208a), a second spring piece (208g) disposed inside the storage groove (208f), a deadlock block (208h) connected to the second spring piece (208g), and a ninth inclined surface (208i) disposed on the deadlock block (208h).

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