A protective device for an offshore wind turbine

Abstract

The present invention belongs to the technical field of wind power generation equipment, and relates to a protective device for an offshore wind turbine. The present invention includes a wind turbine, which is installed in a cylindrical shell. The cylindrical shell has an airflow channel in the axial direction, and a notch is provided on the left and right sides of the front end of the cylindrical shell; a baffle is provided in each notch, and a slide groove is provided on each baffle, and a slider is provided in the slide groove, and the slider is hinged to the bottom of the notch through a hinge; a shell is provided on the lower side of the cylindrical shell, and two connecting blocks are provided in the shell, and each connecting block is fixedly connected to a baffle through a connecting frame set on the shell through forward and backward sliding; a driving mechanism capable of driving the two connecting blocks to slide synchronously is also provided in the shell; when the connecting block slides, the baffle is driven to extend and retract into the airflow channel through the connecting frame and the slider. The advantages of the present invention are: in severe weather conditions such as typhoons, huge wind force is prevented from causing damage to the wind turbine.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation equipment and relates to a protective device for an ocean wind power generator. Background Art

[0002] The ocean has abundant wind energy, and the ocean space is open and convenient for the use of wind energy. At present, most of the wind turbines supported by pillars fixed in the ocean are used to generate electricity. However, in severe weather conditions such as typhoons, since the wind turbines cannot be adjusted, the huge wind force directly hits the impellers and pillars of the wind turbines, which causes damage to the wind turbines. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a protective device for marine wind turbines. The technical problem to be solved by the present invention is: how to prevent the huge wind force from causing damage to the wind turbines under severe weather conditions such as typhoons.

[0004] The present invention is implemented by the following technical solutions: A protective device for an offshore wind turbine generator, comprising a wind turbine generator, and:

[0005] The cylindrical shell has an airflow channel in its axial direction, and the wind turbine is installed in the cylindrical shell; a notch is respectively provided on the left and right sides of the front end of the cylindrical shell;

[0006] Two baffles, each of which is movably arranged in a notch; each of which is provided with at least one long sliding groove along the length direction, the length direction of which is parallel to the axis of the cylindrical shell; a slider is slidably arranged in the sliding groove, and the slider is hinged to the bottom of the notch via a hinge;

[0007] The shell is fixed on the lower side of the cylindrical shell; two connecting blocks are slidably arranged in the shell and are symmetrically arranged with respect to the midline of the shell in the front-to-back direction, and the sliding direction of each connecting block forms an acute angle b with the midline of the shell in the front-to-back direction; each connecting block is fixedly connected to a baffle via a connecting frame slidably arranged on the shell in the front-to-back direction; a driving mechanism capable of driving the two connecting blocks to slide synchronously is also arranged in the shell; when the connecting block slides, the baffle is driven to extend and retract into the air flow channel via the connecting frame and the slider.

[0008] In the above-mentioned protective device for an offshore wind turbine, it also includes a cylindrical pile leg, on which an installation assembly is arranged, and the installation assembly includes an L-shaped fixing frame, a first hinged rod and a second hinged rod in sequence, the vertical rod of the L-shaped fixing frame is fixed on the pile leg, the horizontal rod of the L-shaped fixing frame is hinged to one end of the first hinged rod, the other end of the first hinged rod is hinged to one end of the second hinged rod, and the other end of the second hinged rod is hinged to a buoy slidably arranged on the pile leg; the first hinged rod is fixedly connected to the shell.

[0009] In the above-mentioned protection device for an offshore wind turbine, a sliding sleeve is sleeved on the pile leg, and the sliding sleeve is fixedly connected to the buoy; the buoy is hinged to the second hinged rod via a buoy mounting plate.

[0010] In the above-mentioned protective device for an offshore wind turbine, the driving mechanism includes a telescopic rod slidably arranged in a shell, and the telescopic rod is located on the center line of the shell in the front-to-back direction; the front end of the telescopic rod extends out of the shell and a wind driving plate is fixedly provided at the end, and the rear end extends into the shell and a driving block slidably arranged on the bottom of the shell is fixedly provided at the end, and the sliding direction of the driving block is parallel to the center line of the shell in the front-to-back direction; a first connecting rod is arranged between the driving block and each connecting block; one end of each of the first connecting rods is hinged to the driving block, and the other end is hinged to the connecting block; the driving block is connected to a reset mechanism, and the external force drives the driving block through the wind driving plate, and the driving block compresses the reset mechanism. After the external force is removed, the reset mechanism can drive the driving block to return to its original position.

[0011] In the above-mentioned protective device for an offshore wind turbine, the upper edge of the wind driving plate is lower than the lowest point of the airflow channel, and the lower edge of the wind driving plate is higher than the L-shaped fixing frame.

[0012] In the above-mentioned protective device for an offshore wind turbine, the reset mechanism includes a rack mounting shell fixed in the shell, the length direction of the rack mounting shell is consistent with the front-rear direction of the shell, a rack is slidably arranged in the rack mounting shell, and one end of the rack extends into the rack mounting shell, and the other end of the rack extends out of the rack mounting shell; a reset spring is also arranged in the rack mounting shell; one end of the reset spring presses against the bottom of the rack mounting shell, and the other end presses against the end of the rack extending into the rack mounting shell; the drive block has a tooth surface, and the tooth surface is connected to the rack transmission through a transmission mechanism.

[0013] In the above-mentioned protective device for an offshore wind turbine, a pressure sensor is provided on the bottom of the rack mounting shell, a battery and a controller are provided in the shell, the pressure sensor is electrically connected to the controller via the battery; the buoy is electrically connected to the controller via the battery; and the battery is electrically connected to the wind turbine.

[0014] In the above-mentioned protective device for an offshore wind turbine, an obtuse angle a is formed between the wind driving plate and the telescopic rod.

[0015] In the above-mentioned protective device for an offshore wind turbine, the transmission mechanism includes a pivot rotatably arranged in a shell, and the axis of the pivot is perpendicular to the bottom of the shell; a first gear and a second gear are coaxially fixed on the pivot; the first gear is meshingly connected to the tooth surface, and the second gear is meshingly connected to the rack.

[0016] In the above-mentioned protection device for an offshore wind turbine, the number of teeth of the first gear is smaller than the number of teeth of the second gear.

[0017] Compared with the prior art, this device has the following advantages:

[0018] 1. The side of the baffle plate adjacent to the cylindrical shell extends into the airflow channel and is close to the inner wall of the cylindrical shell, while the side of the baffle plate away from the cylindrical shell extends out of the cylindrical shell. At this time, a trumpet-shaped structure is formed between the two baffle plates and the cylindrical shell, which effectively increases the flow rate of air passing through the airflow channel when the wind force is low, thereby improving the power generation efficiency of the wind turbine.

[0019] The driving mechanism drives the two connecting blocks to slide on their respective U-shaped rods at the same time. The connecting blocks slide from the front end of the U-shaped rod to the rear end of the U-shaped rod, and the connecting blocks drive the baffles through the connecting frame. The side of the baffle away from the cylindrical shell moves toward the rear end of the cylindrical shell driven by the connecting frame, and gradually retracts into the airflow channel; while the side of the baffle adjacent to the cylindrical shell gradually extends into the airflow channel. In this process, the slider slides from one end of the slide slot to the other end of the slide slot, and the baffle rotates around the hinge on the slider. At this time, the two baffles cover the front end opening of the cylindrical shell, effectively reducing the amount of air entering the airflow channel, thereby avoiding damage to the wind turbine.

[0020] 2. The buoy changes its gravity by sucking in and discharging seawater, so that the buoy sinks and floats along the pile legs in the seawater. When the buoy sinks and floats, the buoy drives the first hinged rod to rotate up and down through the second hinged rod, and the first hinged rod drives the cylindrical shell to rotate up and down around the hinge point on the L-shaped fixing frame through the shell. This structure rotates the cylindrical shell, so that the axis of the cylindrical shell changes between parallel to the axis of the pile legs and perpendicular to the axis of the pile legs, and also changes the height of the cylindrical shell, and timely adjusts the angle and height of the wind turbine according to the weather conditions such as the wind force, thereby avoiding damage to the wind turbine caused by huge wind force and effectively reducing the shaking of the pile legs caused by huge wind force.

[0021] 3. The wind drives the telescopic rod to retract into the shell through the wind drive plate. The telescopic rod drives the drive block, and the drive block compresses the reset mechanism and causes the reset mechanism to generate a reaction force, while also driving the two first connecting rods to move. The two first connecting rods each drive the connecting frame through the connecting block, and the connecting frame drives the baffle, so that the two baffles cover the front end opening of the cylindrical shell to avoid damage to the wind turbine. In addition, the wind also produces a backward force on the baffle, which is transmitted to the connecting block through the connecting frame, assisting the movement of the connecting block, thereby helping to increase the rate at which the two baffles cover the front end opening of the cylindrical shell. When the wind force received by the wind drive plate is less than the reaction force generated by the reset mechanism, the reset mechanism drives the drive block to gradually return to its original position. In the above structure, wind force is used as a power source to realize the automatic protection function of the device.

[0022] 4. When the axis of the cylindrical shell is perpendicular to the axis of the pile legs, the wind drives the telescopic rod to retract into the shell through the wind driving plate; when the axis of the cylindrical shell is parallel to the axis of the pile legs, the wind also drives the telescopic rod to retract into the shell through the wind driving plate. This structure allows the wind driving plate to be always affected by wind, further improving the automatic protection function of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural side view of the present invention.

[0024] Figure 2 It is a structural cross-sectional view of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the present invention when it is working.

[0026] Figure 4 yes Figure 1 Schematic diagram of the structure at AA in the middle.

[0027] Figure 5 yes Figure 2 Structural cross-section view at BB in the middle.

[0028] Figure 6 yes Figure 2 A partial enlarged view of point C in the middle.

[0029] Figure 7 It is another working schematic diagram of the baffle in the present invention.

[0030] Figure 8 yes Figure 4 A partial enlarged view of point D in the middle

[0031] In the figure, 1, pile leg; 11, mounting assembly; 111, L-shaped fixing frame; 112, first hinged rod; 113, second hinged rod; 2, wind turbine; 21, cylindrical shell; 211, air flow channel; 22, notch; 3, wind drive plate; 31, telescopic rod; 32, drive block; 321, tooth surface; 33, U-shaped rod; 34, connecting block; 35, first connecting rod; 4, shell; 41, through groove; 42, battery; 43, controller; 44, pressure sensor; 5, baffle; 51, connecting frame; 52, slide groove; 53, slider; 6, rack mounting shell; 61, rack; 62, pivot; 63, first gear; 64, second gear; 65, reset spring; 7, buoy; 71, buoy mounting plate; 72, sleeve. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] Reference Figures 1 to 5 as well as Figure 7 and Figure 8 , a protective device for an offshore wind turbine generator, comprising a wind turbine generator 2, and:

[0034] The cylindrical housing 21 has an airflow channel 211 in its axial direction, and the wind turbine 2 is installed in the cylindrical housing 21; a notch 22 is respectively provided on the left and right sides of the front end of the cylindrical housing 21;

[0035] Two baffles 5, each of which is movably arranged in a notch 22; each of which is provided with at least one long slot 52 along the length direction, and the length direction of the slot 52 is parallel to the axis of the cylindrical shell 2; a slider 53 is slidably arranged in the slot 52, and the slider 53 is hinged to the bottom of the notch 2 via a hinge;

[0036] The shell 4 is fixed on the lower side of the cylindrical shell 21, and two U-shaped rods 33 are fixed in the shell 4. The two U-shaped rods 33 are symmetrically arranged about the center line of the shell 4 in the front-to-back direction; each U-shaped rod 33 forms an acute angle b with the center line of the shell 4 in the front-to-back direction; a connecting block 34 is slidably arranged on each of the U-shaped rods 33, and long strip-shaped through grooves 41 are opened on the left and right side walls of the shell 4, and a connecting frame 51 is slidably arranged in each of the through grooves 41, and each of the connecting blocks 34 is fixedly connected to a baffle 5 via the connecting frame 51; a driving mechanism that can drive the two connecting blocks 34 to slide synchronously is also provided in the shell 4; when the connecting block 34 slides, the baffle 5 is driven to extend and retract into the air flow channel 211 via the connecting frame 51 and the slider 53.

[0037] Under good weather conditions, the wind-driven wind turbine 2 generates electricity normally. Due to the action of the driving mechanism, each connecting block 34 is at the front end of its own U-shaped rod 33. At this time, the connecting block 34 drives the baffle 5 through the connecting frame 51 and the hinge, and the slider 53 slides to one end of the slide groove 52; the side of the baffle 5 adjacent to the cylindrical shell 21 extends into the airflow channel 211 and is close to the inner wall of the cylindrical shell 21, and the side of the baffle 5 away from the cylindrical shell 21 extends out of the cylindrical shell 21. An angle C is formed between each baffle 5 and the axis of the cylindrical shell 21, and the maximum angle of the angle C is 135 degrees. At this time, a trumpet-shaped structure is formed between the two baffles 5 and the cylindrical shell 21, and the trumpet-shaped structure effectively increases the flow rate of air through the airflow channel 211 when the wind is small, thereby improving the power generation efficiency of the wind turbine 2.

[0038] The device opens and closes the driving mechanism under severe weather conditions, such as when facing huge winds such as typhoons. The driving mechanism simultaneously drives the two connecting blocks 34 to slide on their respective U-shaped rods 33, and the connecting blocks 34 slide from the front end of the U-shaped rod 33 to the rear end of the U-shaped rod 33, and the connecting blocks 34 drive the baffle 5 through the connecting frame 51. The side of the baffle 5 away from the cylindrical shell 21 moves toward the rear end of the cylindrical shell 21 under the drive of the connecting frame 51, and also gradually retracts into the airflow channel 211; while the side of the baffle 5 adjacent to the cylindrical shell 21 gradually extends into the airflow channel 211. In this process, the slider 53 slides from one end of the slide groove 52 to the other end of the slide groove 52, and the baffle 5 rotates around the hinge on the slider 53, and the angle C gradually decreases. The minimum angle of the angle C is 30 degrees. At this time, the two baffles 5 cover the front end opening of the cylindrical shell 21, effectively reducing the air entering the airflow channel 211, thereby avoiding damage to the wind turbine 2.

[0039] Reference Figure 1 Preferably, one side of each baffle 5 adjacent to the cylindrical shell 21 is arc-shaped.

[0040] When the angle C reaches the maximum angle, the slider 53 slides to one end of the slide slot 52 . At this time, the side of the baffle 5 adjacent to the cylindrical shell 21 is just located in the notch 22 , which helps to improve the working efficiency of the wind turbine 2 .

[0041] Preferably, the acute angle b is 45 degrees.

[0042] The setting of the acute angle b helps the baffle 5 to extend out and retract into the air flow channel 211 .

[0043] Reference Figures 1 to 3Specifically, it also includes a cylindrical pile leg 1, on which a mounting assembly 11 is arranged, and the mounting assembly 11 includes an L-shaped fixing frame 111, a first hinged rod 112 and a second hinged rod 113 in sequence, the vertical rod of the L-shaped fixing frame 111 is fixed on the pile leg 1, the horizontal rod of the L-shaped fixing frame 111 is hinged to one end of the first hinged rod 112, the other end of the first hinged rod 112 is hinged to one end of the second hinged rod 113, and the other end of the second hinged rod 113 is hinged to a buoy 7 slidably arranged on the pile leg 1; the first hinged rod 112 is fixedly connected to the shell 4.

[0044] When the buoy 7 is working, the buoy 7 changes the gravity of the buoy 7 by sucking and discharging seawater, so that the buoy 7 sinks and floats in the seawater along the pile leg 1. When the buoy 7 sinks and floats, the buoy 7 drives the first hinge rod 112 to rotate up and down through the second hinge rod 113, and the first hinge rod 112 drives the cylindrical shell 21 to rotate up and down around the hinge point on the L-shaped fixing frame 111 through the shell 4. This structure rotates the cylindrical shell 21, so that the axis of the cylindrical shell 21 changes between parallel to the axis of the pile leg 1 and perpendicular to the axis of the pile leg 1, and also changes the height of the cylindrical shell 21, and timely adjusts the angle and height of the wind turbine 2 according to the weather conditions such as the wind force, so as to avoid the damage of the wind turbine 2 caused by the huge wind force and effectively reduce the shaking of the pile leg 1 caused by the huge wind force.

[0045] Reference Figures 1 to 3 Specifically, a sliding sleeve 72 is sleeved on the pile leg 1, and the sliding sleeve 72 is fixedly connected to the buoy 7; the buoy 7 is hinged to the second hinged rod 113 via the buoy mounting plate 71.

[0046] When the buoy 7 inhales and discharges seawater, the buoy 7 sinks and floats on the pile leg 1 via the sliding sleeve 72. The arrangement of the buoy 7 and the sliding sleeve 72 helps to adjust the height of the buoy 7.

[0047] Reference Figure 2 , Figure 3 , Figure 5 and Figure 6Specifically, the driving mechanism includes a telescopic rod 31 slidably arranged in the shell 4, and the telescopic rod 31 is located on the midline of the shell 4 in the front-to-back direction; the front end of the telescopic rod 31 extends out of the shell 4 and a wind driving plate 3 is fixedly provided at the end, and the rear end extends into the shell 4 and a driving block 32 slidably arranged on the bottom of the shell 4 is fixedly provided at the end, and the sliding direction of the driving block 32 is parallel to the midline of the shell 4 in the front-to-back direction; a first connecting rod 35 is arranged between the driving block 32 and each connecting block 34; one end of each of the first connecting rods 35 is hinged on the driving block 32, and the other end is hinged on the connecting block 34; the driving block 32 is connected to a reset mechanism, and the external force drives the driving block 32 through the wind driving plate 3, and the driving block 32 compresses the reset mechanism. After the external force is removed, the reset mechanism can drive the driving block 32 to return to its original position.

[0048] When the device is under severe weather conditions, such as when facing huge wind forces such as typhoons, the wind force drives the telescopic rod 31 to retract into the housing 4 through the wind driving plate 3. The telescopic rod 31 drives the driving block 32, and the driving block 32 compresses the reset mechanism and causes the reset mechanism to generate a reaction force, and also drives the two first connecting rods 35 to move. The two first connecting rods 35 each drive the connecting frame 51 through the connecting block 34, and the connecting frame 51 drives the baffle 5, so that the two baffles 5 cover the front end opening of the cylindrical shell 21 to prevent damage to the wind turbine 2. In addition, the wind force also produces a backward force on the baffle 5, which is transmitted to the connecting block 34 through the connecting frame 51, assisting the movement of the connecting block 34, thereby helping to increase the speed at which the two baffles 5 cover the front end opening of the cylindrical shell 21. When the wind force received by the wind driving plate 3 is less than the reaction force generated by the reset mechanism, the reset mechanism drives the driving block 32 to gradually return to its original position. In the above structure, wind force is used as a power source to realize the automatic protection function of the device.

[0049] Reference Figures 1 to 3 Specifically, the upper edge of the wind driving plate 3 is lower than the lowest point of the airflow channel 211 , and the lower edge of the wind driving plate 3 is higher than the L-shaped fixing frame 111 .

[0050] This structure helps to reduce the impact of the wind driving plate 3 on the wind turbine 2 .

[0051] Reference Figure 2 and Figure 6Specifically, the reset mechanism includes a rack mounting shell 6 fixed in the housing 4, the length direction of the rack mounting shell 6 is consistent with the front-to-back direction of the housing 4, a rack 61 is slidably arranged in the rack mounting shell 6, and one end of the rack 61 extends into the rack mounting shell 6, and the other end of the rack 61 extends out of the rack mounting shell 6; a reset spring 65 is also arranged in the rack mounting shell 6; one end of the reset spring 65 presses against the bottom of the rack mounting shell 6, and the other end presses against the end of the rack 61 extending into the rack mounting shell 6; the driving block 32 has a tooth surface 321, and the tooth surface 321 is transmission-connected to the rack 61 via a transmission mechanism.

[0052] The driving block 32 drives the rack 61 to move via the tooth surface 321 and the transmission mechanism. The rack 61 compresses the return spring 65 and causes the return spring 65 to generate a force. When the wind force decreases, the force generated by the return spring 65 restores the driving block 32 to its original position.

[0053] Reference Figure 2 , Figure 3 and Figure 6 Specifically, a pressure sensor 44 is provided on the bottom of the rack mounting shell 6, a battery 42 and a controller 43 are provided in the shell 4, the pressure sensor 44 is electrically connected to the controller 43 through the battery 42; the buoy 7 is electrically connected to the controller 43 through the battery 42; the battery 42 is electrically connected to the wind turbine 2.

[0054] When the return spring 65 is compressed to generate a force, the pressure sensor 44 converts the force into an electrical signal and transmits it to the controller 43. The controller 43 sends an electrical signal to the sinking and buoying cylinder 7, so that the sinking and buoying cylinder 7 inhales or discharges seawater, thereby changing the angle and height of the wind turbine 2. This structure enables the cylindrical housing 21 to rotate automatically, further realizing the automatic protection function of the device.

[0055] Reference Figure 2 and Figure 7 Specifically, an obtuse angle a is formed between the wind-driven plate 3 and the telescopic rod 31. The obtuse angle a is 135 degrees.

[0056] When the axis of the cylindrical housing 21 is perpendicular to the axis of the pile leg 1, the wind drives the telescopic rod 31 to retract into the housing 4 through the wind driving plate 3; when the axis of the cylindrical housing 21 is parallel to the axis of the pile leg 1, the wind also drives the telescopic rod 31 to retract into the housing 4 through the wind driving plate 3. This structure enables the wind driving plate 3 to be always affected by the wind, further improving the automatic protection function of the device.

[0057] Reference Figure 6Specifically, the transmission mechanism includes a pivot 62 rotatably arranged in the shell 4, and the axis of the pivot 62 is perpendicular to the bottom of the shell 4; a first gear 63 and a second gear 64 are coaxially fixed on the pivot 62; the first gear 63 is meshedly connected with the tooth surface 321, and the second gear 64 is meshedly connected with the rack 61.

[0058] The driving block 32 drives the first gear 63 to rotate via the tooth surface 321 , and the first gear 63 drives the rack 61 via the pivot 62 and the second gear 64 , so that the rack 61 compresses the return spring 65 .

[0059] Reference Figure 6 Specifically, the number of teeth of the first gear 63 is less than the number of teeth of the second gear 64.

[0060] This structure makes the movement distance of the rack 61 greater than the movement distance of the drive block 32, increases the deformation of the return spring 65, and thus greatly increases the force generated by the return spring 65, which helps the drive block 32 return to its original position after the wind force decreases.

[0061] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A protective device for an offshore wind turbine, comprising a wind turbine (2), characterized in that: Also includes: A cylindrical housing (21) having an air flow channel (211) in the axial direction, wherein the wind turbine (2) is installed in the cylindrical housing (21); a notch (22) is respectively provided on the left and right sides of the front end of the cylindrical housing (21); Two baffles (5), each of the baffles (5) is movably arranged in a notch (22); each of the baffles (5) is provided with at least one long sliding groove (52) along the length direction, and the length direction of the sliding groove (52) is parallel to the axis of the cylindrical shell (2); a sliding block (53) is slidably arranged in the sliding groove (52), and the sliding block (53) is hinged to the bottom of the notch (22) via a hinge; A shell (4) is fixedly arranged on the lower side of the cylindrical shell (21); two connecting blocks (34) are slidably arranged in the shell (4) and are symmetrically arranged about the midline of the shell (4) in the front-rear direction, and the sliding direction of each connecting block (34) forms an acute angle b with the midline of the shell (4) in the front-rear direction; each connecting block (34) is fixedly connected to a baffle (5) via a connecting frame (51) slidably arranged on the shell (4) in the front-rear direction; a driving mechanism capable of driving the two connecting blocks (34) to slide synchronously is also arranged in the shell (4); when the connecting block (34) slides, the baffle (5) is driven to extend and retract into the air flow channel (211) via the connecting frame (51) and the sliding block (53); a side of each baffle (5) adjacent to the cylindrical shell (21) is arc-shaped; The driving mechanism comprises a telescopic rod (31) slidably arranged in a housing (4), the telescopic rod (31) being located on the midline of the housing (4) in the front-rear direction; the front end of the telescopic rod (31) extends out of the housing (4) and a wind driving plate (3) is fixedly arranged at the end, the rear end extends into the housing (4) and a driving block (32) slidably arranged on the bottom of the housing (4) is fixedly arranged at the end, and the sliding direction of the driving block (32) is parallel to the midline of the housing (4) in the front-rear direction; a first connecting rod (35) is arranged between the driving block (32) and each connecting block (34); one end of each of the first connecting rods (35) is hinged to the driving block (32) and the other end is hinged to the connecting block (34); the driving block (32) is connected to a reset mechanism, the external force drives the driving block (32) through the wind driving plate (3), the driving block (32) compresses the reset mechanism, and after the external force is removed, the reset mechanism can drive the driving block (32) to return to its original position.

2. A protective device for an offshore wind turbine according to claim 1, characterized in that: It also includes a cylindrical pile leg (1), on which a mounting assembly (11) is arranged, and the mounting assembly (11) includes an L-shaped fixing frame (111), a first hinged rod (112) and a second hinged rod (113) in sequence, the vertical rod of the L-shaped fixing frame (111) is fixed on the pile leg (1), the horizontal rod of the L-shaped fixing frame (111) is hinged to one end of the first hinged rod (112), the other end of the first hinged rod (112) is hinged to one end of the second hinged rod (113), and the other end of the second hinged rod (113) is hinged to a sinking and buoying cylinder (7) slidably arranged on the pile leg (1); the first hinged rod (112) is fixedly connected to the shell (4).

3. A protective device for an offshore wind turbine according to claim 2, characterized in that: A sliding sleeve (72) is sleeved on the pile leg (1), and the sliding sleeve (72) is fixedly connected to the buoy (7); the buoy (7) is hinged to the second hinged rod (113) via the buoy mounting plate (71).

4. A protective device for an offshore wind turbine according to claim 3, characterized in that: The upper edge of the wind driving plate (3) is lower than the lowest point of the airflow channel (211), and the lower edge of the wind driving plate (3) is higher than the L-shaped fixing frame (111).

5. A protective device for an offshore wind turbine according to claim 4, characterized in that: The reset mechanism comprises a rack mounting shell (6) fixedly arranged in the housing (4), the length direction of the rack mounting shell (6) being consistent with the front-rear direction of the housing (4), a rack (61) being slidably arranged in the rack mounting shell (6), one end of the rack (61) extending into the rack mounting shell (6), and the other end of the rack (61) extending out of the rack mounting shell (6); a reset spring (65) is also arranged in the rack mounting shell (6); one end of the reset spring (65) is pressed against the bottom of the rack mounting shell (6), and the other end is pressed against the end of the rack (61) extending into the rack mounting shell (6); the driving block (32) has a tooth surface (321), and the tooth surface (321) is transmission-connected to the rack (61) via a transmission mechanism.

6. A protective device for an offshore wind turbine according to claim 5, characterized in that: A pressure sensor (44) is provided on the bottom of the rack mounting shell (6); a battery (42) and a controller (43) are provided in the shell (4); the pressure sensor (44) is electrically connected to the controller (43) via the battery (42); the buoy (7) is electrically connected to the controller (43) via the battery (42); and the battery (42) is electrically connected to the wind turbine (2).

7. A protective device for an offshore wind turbine according to claim 6, characterized in that: An obtuse angle a is formed between the wind-driven plate (3) and the telescopic rod (31).

8. The protection device for an offshore wind turbine according to claim 7, characterized in that: The transmission mechanism comprises a pivot shaft (62) rotatably arranged in the housing (4), wherein the axis of the pivot shaft (62) is perpendicular to the bottom of the housing (4); a first gear (63) and a second gear (64) are coaxially fixedly arranged on the pivot shaft (62); the first gear (63) is meshingly connected to the tooth surface (321), and the second gear (64) is meshingly connected to the rack (61).

9. A protective device for an offshore wind turbine according to claim 8, characterized in that: The number of teeth of the first gear (63) is smaller than the number of teeth of the second gear (64).

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