Wind driven generator fairing capable of draining water at sea

Abstract

The utility model relates to an offshore drainage wind driven generator fairing which comprises a fairing body, a first connecting cylinder, a second connecting cylinder, a fixing portion and a sealing piece, the rear end of the first connecting cylinder is used for being fixedly connected to a cabin in a sealed mode, and the front end of the second connecting cylinder right faces the rear end of the fairing body and is fixedly connected with the rear end of the fairing body in a sealed mode. The second connecting cylinder is annularly arranged on the first connecting cylinder, and the fixing part is used for fixedly connecting the second connecting cylinder to the first connecting cylinder. Due to the fact that the second connecting cylinder is arranged on the first connecting cylinder in a surrounding mode, rainwater carried in wind blown from the front face flows backwards through the cover body and the outer wall of the second connecting cylinder, the water cannot be blocked at the rear end of the second connecting cylinder, and the sealing piece is arranged between the first connecting cylinder and the second connecting cylinder and blocks a gap between the first connecting cylinder and the second connecting cylinder. Therefore, water is not easy to enter the cover body from the connecting position of the first connecting cylinder and the second connecting cylinder, and the possibility that water enters the cabin can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of generator shrouds, in particular to a drainable offshore wind turbine shroud. Background Art

[0002] Wind turbines are located in areas with strong winds for a long time. If rainwater seeps into the wind turbine cabin, it will affect the power generation of the wind turbine. In order to better maintain the long-term operation of the wind turbine, a wind turbine deflector with better performance is needed.

[0003] The existing wind turbine shroud is assembled and fixed to the nacelle. For example, a Chinese patent (publication number: CN215170549U) discloses a lightweight drainage wind turbine shroud. The shroud's main housing is docked with the end of the nacelle. A locating ring is then placed on the outer wall of the shroud's main housing at the connection point between the shroud and the nacelle, thereby securing the shroud to the nacelle. After the shroud is secured to the nacelle using this combined fixing method, the locating ring protrudes from the outer surface of the shroud. The wind turbine's power generation principle is to rotate the shroud to face the incoming wind using a yaw system. The wind blowing from the shroud drives the blades to rotate, generating electricity. On rainy days, the incoming wind carries rainwater, which the locating ring blocks, causing it to accumulate at the connection point between the locating ring and the shroud. Water trapped at the locating ring and the shroud can easily seep into the nacelle from the connection point between the shroud and the nacelle, increasing the likelihood of flooding the nacelle. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a drainable offshore wind turbine shroud to solve the technical problem that after the existing shroud is assembled and fixed with the nacelle, the nacelle is more likely to be flooded.

[0005] The utility model is achieved through the following technical solutions:

[0006] A water-displaceable offshore wind turbine deflector comprises a cover body, a first connecting tube, a second connecting tube, a fixing portion and a sealing member. The rear end of the cover body is open, the rear end of the first connecting tube is used for sealing and fixed connection to the nacelle, the front end of the second connecting tube faces the rear end of the cover body and is sealing and fixedly connected to the rear end of the cover body, the second connecting tube is annularly arranged on the first connecting tube, and the fixing portion is used for fixing the second connecting tube to the first connecting tube; the sealing member is arranged between the first connecting tube and the second connecting tube and is used to seal the gap between the first connecting tube and the second connecting tube.

[0007] It is further defined that the second connecting tube includes a first ring connected to the rear end opening of the cover body and a second ring connected to the rear end of the first ring, and the second ring is arranged on the first connecting tube; the sealing member is arranged between the second ring and the first connecting tube, and the fixing portion is used to fix the second ring to the first connecting tube.

[0008] It is further defined that the outer circumferential surface of the first connecting tube is recessed to form a first annular groove, the inner circumferential surface of the second ring is recessed to form a second annular groove, and the first groove is directly opposite to the second groove; the sealing component includes a first sealing ring, a second sealing ring and a third sealing ring, the first sealing ring is arranged on the first connecting tube and is located in the second ring, the second sealing ring is a circular ring structure formed by protruding inward from the inner circumference of the first sealing ring, the second sealing ring is located in the first groove and has an interference fit with the first groove, the third sealing ring is a circular ring structure formed by protruding outward from the outer circumference of the first sealing ring, the third sealing ring is located in the second groove and has an interference fit with the second groove.

[0009] It is further defined that the sealing member also includes a fourth sealing ring, which is formed by protruding inward from the inner wall of the front end of the first sealing ring, and the front and rear side surfaces of the fourth sealing ring respectively abut the front end of the first connecting tube and the rear end of the first ring.

[0010] It is further defined that the inner wall of the first circular ring is recessed to form a circular water diversion groove, and a drainage hole is provided on the first circular ring at a position corresponding to the bottom of the water diversion groove, the upper end of the drainage hole is connected to the water diversion groove, and the lower end is connected to the outer surface of the first circular ring.

[0011] It is further defined that it also includes a conical cylinder, the large end of the conical cylinder faces backward, the rear end edge of the conical cylinder is fixedly connected to the inner edge of the front end of the first connecting cylinder, and the front end of the conical cylinder is located in the cover body.

[0012] It is further defined that the outer circumferential surface of the first connecting tube is recessed to form a plurality of first screw holes, and the plurality of first screw holes are evenly arranged along the circumferential direction, and a first through hole is formed on the second ring and the first sealing ring at a position corresponding to each of the first screw holes; the fixing portion includes a plurality of first bolts, and the plurality of first bolts are arranged in a one-to-one correspondence in the plurality of first through holes, the screw-in ends of the first bolts are screwed into the corresponding first screw holes, and the bolt heads of the first bolts abut against the outer circumferential surface of the second ring.

[0013] It is further defined that the outer circumferential surface of the first connecting tube is also recessed to form a plurality of second screw holes, and the plurality of second screw holes are evenly arranged along the circumferential direction, and second through holes are formed on the second ring and the first sealing ring at the position corresponding to each second screw hole; the fixing part also includes a plurality of second bolts, and the plurality of second bolts are arranged in a one-to-one correspondence in the plurality of second through holes, and the screw-in ends of the second bolts are screwed into the corresponding second screw holes, and the bolt heads of the second bolts abut against the outer circumferential surface of the second ring, and the second screw holes and the first screw holes are respectively located in front and behind the first groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the offshore drainable wind turbine shroud of the present invention is installed on the nacelle, and since the rear end of the first connecting tube is sealed and fixedly connected to the nacelle, water is not easily entered into the nacelle from the connection position between the first connecting tube and the nacelle; since the front end of the second connecting tube is directly opposite to the rear end of the shroud body and is sealed and fixedly connected to the rear end of the shroud body, water is not easily entered into the shroud body from the connection position between the second connecting tube and the shroud body; since the second connecting tube is annularly arranged on the first connecting tube, rainwater carried by the wind blowing from the front flows backward through the shroud body and the outer wall of the second connecting tube, and then can be separated from the second connecting tube backward from the rear end of the second connecting tube under the action of wind, water will not be blocked at the rear end position of the second connecting tube, and water is not easily retained at the rear end position of the second connecting tube, that is, water is not easily retained at the connection position of the first connecting tube and the second connecting tube, and the sealing member is arranged between the first connecting tube and the second connecting tube and blocks the gap between the first connecting tube and the second connecting tube, thereby making it difficult for water to enter the shroud body from the connection position of the first connecting tube and the second connecting tube, thereby reducing the possibility of water entering the nacelle.

[0015] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a drainable offshore wind turbine shroud according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structural disassembly of a drainable offshore wind turbine shroud according to an embodiment of the present utility model;

[0018] Figure 3 It is a partial structural sectional view of the utility model;

[0019] Figure 4 yes Figure 3 A magnified schematic diagram of the structure at point A.

[0020] Figure markings: 1. cover body; 2. first connecting tube; 21. first groove; 3. second connecting tube; 31. first ring; 311. water diversion groove; 312. drainage hole; 32. second ring; 321. second groove; 4. fixing part; 41. first bolt; 42. second bolt; 5. sealing member; 51. first sealing ring; 52. second sealing ring; 53. third sealing ring; 54. fourth sealing ring; 6. conical tube; 7. first screw hole; 8. second screw hole. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the above description of the present invention, it should be noted that the terms "one side" and "the other side" and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0026] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings.

[0027] Example: Figures 1 to 4 As shown, the utility model provides a technical solution: a wind turbine deflector with drainage at sea, comprising a cover body 1, a first connecting tube 2, a second connecting tube 3, a fixing portion 4 and a sealing member 5. The rear end of the cover body 1 is open, and the rear end of the first connecting tube 2 is used for sealing and fixed connection to the nacelle, that is, the rear end edge of the first connecting tube 2 is used for fixed connection to the nacelle. After the rear end edge of the first connecting tube 2 is fixedly connected to the nacelle, air and water cannot enter the nacelle from the connection position between the first connecting tube 2 and the nacelle. For example, the rear end of the first connecting tube 2 can be fixedly connected to the nacelle. The entire edge of the end is welded to the cabin to achieve a sealed fixed connection between the rear end edge of the first connecting tube 2 and the cabin. The front end of the second connecting tube 3 faces the rear end of the cover body 1 and is sealed and fixed to the rear end of the cover body 1, that is, the front end of the second connecting tube 3 is fixedly connected to the rear end of the cover body 1, and air and water cannot enter the cover body 1 from the connection position between the second connecting tube 3 and the cover body 1. For example, the second connecting tube 3 and the cover body 1 can be integrally formed to achieve a sealed fixed connection between the front end edge of the second connecting tube 3 and the cover body 1. The second connecting tube 3 is arranged on the first connecting tube 2, and the fixing portion 4 is used to fix the second connecting tube 3 to the first connecting tube 2; the sealing member 5 is arranged between the first connecting tube 2 and the second connecting tube 3 and is used to seal the gap between the first connecting tube 2 and the second connecting tube 3.

[0028] The state of the above-mentioned offshore drainable wind turbine fairing after being installed on the above-mentioned nacelle of the utility model is as follows: the rear end of the above-mentioned first connecting tube 2 is sealed and fixedly connected to the nacelle, the front end of the above-mentioned second connecting tube 3 is opposite to the rear end of the above-mentioned cover body 1 and is sealed and fixedly connected to the rear end of the above-mentioned cover body 1, the above-mentioned second connecting tube 3 is annularly arranged on the first connecting tube 2, and the second connecting tube 3 is fixedly connected to the first connecting tube 2; the above-mentioned sealing component 5 is arranged between the first connecting tube 2 and the second connecting tube 3 and blocks the gap between the first connecting tube 2 and the second connecting tube 3.

[0029] Since the rear end of the first connecting tube 2 is sealed and fixedly connected to the cabin, water is not easy to enter the cabin from the connection position of the first connecting tube 2 and the cabin; since the front end of the second connecting tube 3 is directly opposite to the rear end of the cover body 1 and is sealed and fixedly connected to the rear end of the cover body 1, water is not easy to enter the cover body 1 from the connection position of the second connecting tube 3 and the cover body 1; since the second connecting tube 3 is annularly arranged on the first connecting tube 2, rainwater carried by the wind blowing from the front flows backward through the outer wall of the cover body 1 and the second connecting tube 3, and then can be discharged from the second connecting tube 3 under the action of wind. The rear end of the cylinder 3 is separated from the second connecting cylinder 3 backward, and water will not be blocked at the rear end of the second connecting cylinder 3, and water is not likely to be retained at the rear end of the second connecting cylinder 3, that is, water is not likely to be retained at the connection position of the first connecting cylinder 2 and the second connecting cylinder 3, and the sealing member 5 is provided between the first connecting cylinder 2 and the second connecting cylinder 3 and blocks the gap between the first connecting cylinder 2 and the second connecting cylinder 3, thereby making it difficult for water to enter the cover 1 from the connection position of the first connecting cylinder 2 and the second connecting cylinder 3, thereby reducing the possibility of water entering the cabin. In the above description, the wind blowing from the front refers to the wind blowing from the front end of the cover 1 to the rear end of the cover 1.

[0030] In this embodiment, the second connecting tube 3 includes a first ring 31 connected to the rear end opening of the housing 1 and a second ring 32 connected to the rear end of the first ring 31. The second ring 32 is disposed around the first connecting tube 2. The sealing member 5 is disposed between the second ring 32 and the first connecting tube 2, and the fixing portion 4 is used to securely connect the second ring 32 to the first connecting tube 2. With this structure, the sealing member 5 can seal the gap between the first connecting tube 2 and the second connecting tube 3, and the fixing portion 4 can securely connect the second connecting tube 3 to the first connecting tube 2.

[0031] In this embodiment, the outer circumferential surface of the above-mentioned first connecting tube 2 is recessed to form an annular first groove 21, and the inner circumferential surface of the above-mentioned second ring 32 is recessed to form an annular second groove 321, and the above-mentioned first groove 21 is directly opposite to the second groove 321; the above-mentioned sealing member 5 includes a first sealing ring 51, a second sealing ring 52 and a third sealing ring 53, the above-mentioned first sealing ring 51 is arranged on the above-mentioned first connecting tube 2 and is located in the above-mentioned second ring 32, the above-mentioned second sealing ring 52 is a circular ring structure formed by protruding inward from the inner circumference of the above-mentioned first sealing ring 51, the above-mentioned second sealing ring 52 is located in the above-mentioned first groove 21 and is interference fit with the above-mentioned first groove 21, the above-mentioned third sealing ring 53 is a circular ring structure formed by protruding outward from the outer circumferential surface of the above-mentioned first sealing ring 51, the above-mentioned third sealing ring 53 is located in the above-mentioned second groove 321 and is interference fit with the above-mentioned second groove 321.

[0032] After the above-mentioned offshore drainable wind turbine deflector of the present invention is installed on the above-mentioned nacelle, the above-mentioned sealing member 5 is arranged on the above-mentioned first connecting tube 2, that is, the above-mentioned first sealing ring 51 is arranged on the outer peripheral surface of the above-mentioned first connecting tube 2, the above-mentioned second sealing ring 52 is located in the above-mentioned first groove 21, and the above-mentioned third sealing ring 53 is located in the above-mentioned second groove 321. The above-mentioned second sealing ring 52 is interference fit with the above-mentioned first groove 21, and the above-mentioned third sealing ring 53 is interference fit with the above-mentioned second groove 321. The above-mentioned first sealing ring 51, the second sealing ring 52 and the third sealing ring 53 can block the gap between the above-mentioned second ring 32 and the first connecting tube 2, and can prevent rainwater from seeping into the cover body 1 and the nacelle. Furthermore, since the second sealing ring 52 is formed by protruding inward from the inner circumference of the first sealing ring 51, and the third sealing ring 53 is formed by protruding outward from the outer circumference of the first sealing ring 51, if rainwater still seeps into between the first connecting tube 2 and the second connecting tube 3, the second sealing ring 52 and the third sealing ring 53 protruding inward or outward from the first sealing ring 51 can further prevent the rainwater from continuing to flow forward, thereby further reducing the possibility of rainwater seeping into the cover body 1.

[0033] The sealing member 5 is made of rubber, which is a highly elastic polymer material. Therefore, the sealing member 5 is elastic and can be deformed elastically. The first sealing ring 51, the second sealing ring 52 and the third sealing ring 53 are integrally formed.

[0034] When the sealing member 5 and the second connecting tube 3 are installed on the first connecting tube 2, the first sealing ring 51 is placed opposite the front end of the first connecting tube 2 and pushed backward, so that the rear end of the first sealing ring 51 is arranged around the outer peripheral surface of the first connecting tube 2, and then the first sealing ring 51 is pushed backward with force. Since the second sealing ring 52 is elastic, when the first sealing ring 51 is pushed backward, the second sealing ring 52 is squeezed by the first connecting tube 2 and elastically deformed, so that the second sealing ring 52 can slide on the outer peripheral surface of the first connecting tube 2, and the first sealing ring 51 is pushed backward until it is The above-mentioned second sealing ring 52 is engaged in the above-mentioned first groove 21, and then the above-mentioned second connecting tube 3 is placed opposite to the above-mentioned first sealing ring 51 and pushed backward. The above-mentioned second connecting tube 3 slides backward on the outer circumference of the above-mentioned first sealing ring 51, and the rear end of the above-mentioned second connecting tube 3 squeezes the above-mentioned third sealing ring 53. The above-mentioned third sealing ring 53 is squeezed to elastically deform and shrink in the above-mentioned second connecting tube 3, and the above-mentioned second connecting tube 3 is continued to be pushed backward until the above-mentioned third sealing ring 53 is engaged in the above-mentioned second groove 321, and the sealing component 5 and the second connecting tube 3 are installed on the first connecting tube 2.

[0035] When removing the sealing member 5 and the second connecting tube 3 from the first connecting tube 2, first remove the fixing portion 4 from the first connecting tube 2 and the second connecting tube 3, and then pull the second connecting tube 3 forward. When pulling the second connecting tube 3 forward, the third sealing ring 53 is squeezed by the inner wall of the second connecting tube 3 and elastically deformed, so that the second connecting tube 3 can slide forward relative to the third sealing ring 53, that is, the second connecting tube 3 can be removed from the first connecting tube 2; then pull the first sealing ring 51 forward. When pulling the first sealing ring 51 forward, the second sealing ring 52 can be squeezed by the outer peripheral surface of the first connecting tube 2 and elastically deformed, so that the first sealing ring 51 can slide forward relative to the first connecting tube 2, that is, the first sealing ring 51 can be removed from the first connecting tube 2, that is, the sealing member 5 is removed from the first connecting tube 2.

[0036] In this embodiment, the sealing member 5 further includes a fourth sealing ring 54, which protrudes inward from the inner wall of the front end of the first sealing ring 51. The front and rear side surfaces of the fourth sealing ring 54 respectively abut the front end of the first connecting tube 2 and the rear end of the first circular ring 31. Specifically, the fourth sealing ring 54 and the first sealing ring 51 are integrally formed.

[0037] After the above-mentioned offshore drainable wind turbine fairing of the present invention is installed on the above-mentioned nacelle, the front and rear side surfaces of the above-mentioned fourth sealing ring 54 respectively abut against the front end of the above-mentioned first connecting tube 2 and the rear end of the above-mentioned first ring 31, which can further seal the gap at the connection between the above-mentioned first connecting tube 2 and the second connecting tube 3, thereby reducing the possibility of rainwater seeping into the nacelle.

[0038] In this embodiment, the inner wall of the above-mentioned first ring 31 is recessed to form a circular water diversion groove 311, and a drainage hole 312 is provided on the above-mentioned first ring 31 at a position corresponding to the bottom of the above-mentioned water diversion groove 311. The upper end of the above-mentioned drainage hole 312 is connected to the above-mentioned water diversion groove 311, and the lower end is connected to the outer surface of the above-mentioned first ring 31.

[0039] The first circular ring 31 is connected to the rear end opening of the cover body 1. The inner wall of the first circular ring 31 and the inner wall of the rear end of the cover body 1 are at the same height, that is, the height of the inner wall of the first circular ring 31 is the lowest point of the inner wall of the cover body 1. If rainwater still seeps into the cover body 1 from the first connecting tube 2 and the second connecting tube 3, the rainwater can flow downward along the inner wall of the cover body 1 and be collected in the water diversion groove 311, and then be discharged from the cover body 1 through the drainage hole 312.

[0040] After the above-mentioned offshore drainable wind turbine shroud of the present invention is installed on the above-mentioned nacelle, the above-mentioned drainage hole 312 needs to be kept at the bottom of the above-mentioned offshore drainable wind turbine shroud of the present invention.

[0041] In this embodiment, a conical cylinder 6 is further included, the large end of the conical cylinder 6 faces backward, the rear end edge of the conical cylinder 6 is fixedly connected to the inner edge of the front end of the first connecting cylinder 2, and the front end of the conical cylinder 6 is located in the cover body 1.

[0042] After the above-mentioned drainable offshore wind turbine shroud of the present invention is installed on the above-mentioned nacelle, if rainwater still seeps in from the connection between the first connecting tube 2 and the second connecting tube 3, the seeped rainwater will drip onto the outer wall of the cone tube 6, flow forward along the outer wall of the cone tube 6 and then drip onto the inner wall of the cover body 1. The rainwater dripping onto the inner wall of the cover body 1 flows along the inner wall of the cover body 1 and is collected in the water diversion groove 311, and then is discharged from the drainage hole 312, which can reduce the possibility of the seeped rainwater entering the first connecting tube 2 and reduce the possibility of the seeped rainwater entering the nacelle from the first connecting tube 2.

[0043] In this embodiment, the outer circumferential surface of the first connecting tube 2 is recessed to form a plurality of first screw holes 7, which are evenly arranged along the circumferential direction. A first through hole is formed on the second ring 32 and the first sealing ring 51 at a position corresponding to each of the first screw holes 7. The fixing portion 4 includes a plurality of first bolts 41, which are correspondingly disposed in the plurality of first through holes. The screw-in ends of the first bolts 41 are screwed into the corresponding first screw holes 7, and the bolt heads of the first bolts 41 abut against the outer circumferential surface of the second ring 32. With this structure, the first bolts 41 can securely connect the second ring 32 to the first connecting tube 2, that is, the fixing portion 4 can securely connect the second connecting tube 3 to the first connecting tube 2.

[0044] In this embodiment, the outer circumferential surface of the above-mentioned first connecting tube 2 is further recessed to form a plurality of second screw holes 8, and the plurality of second screw holes 8 are evenly arranged along the circumferential direction, and second through holes are formed on the second ring 32 and the first sealing ring 51 at positions corresponding to each of the above-mentioned second screw holes 8; the above-mentioned fixing portion 4 also includes a plurality of second bolts 42, and the plurality of second bolts 42 are correspondingly arranged in the plurality of second through holes, and the screw-in ends of the above-mentioned second bolts 42 are screwed into the corresponding second screw holes 8, and the bolt heads of the above-mentioned second bolts 42 resist the outer circumferential surface of the above-mentioned second ring 32, and the above-mentioned second screw holes 8 and the above-mentioned first screw holes 7 are respectively located in front and behind the above-mentioned first groove 21.

[0045] In this embodiment, the above-mentioned first screw hole 7 and the first through hole are arranged in front of the above-mentioned first groove 21, and the above-mentioned second screw hole 8 and the second through hole are arranged behind the above-mentioned first groove 21. After the above-mentioned offshore drainable wind turbine deflector of the utility model is installed on the above-mentioned nacelle, the above-mentioned first bolt 41 and the second bolt 42 fix the above-mentioned second connecting tube 3 to the above-mentioned first connecting tube 2, and the above-mentioned first bolt 41 and the second bolt 42 respectively fix the front and rear sides of the above-mentioned first groove 21, which can further improve the firmness of the connection between the above-mentioned first connecting tube 2 and the above-mentioned second connecting tube 3.

[0046] The above description of the disclosed embodiments will enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0047] Although this document frequently uses the following terms: 1, housing; 2, first connecting cylinder; 21, first groove; 3, second connecting cylinder; 31, first circular ring; 311, water diversion groove; 312, drainage hole; 32, second circular ring; 321, second groove; 4, fixing portion; 41, first bolt; 42, second bolt; 5, sealing member; 51, first sealing ring; 52, second sealing ring; 53, third sealing ring; 54, fourth sealing ring; 6, conical cylinder; 7, first screw hole; 8, second screw hole, etc., the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A wind turbine shroud with drainage function at sea, characterized by: The invention comprises a cover body (1), a first connecting tube (2), a second connecting tube (3), a fixing portion (4) and a sealing member (5); the rear end of the cover body (1) is open; the rear end of the first connecting tube (2) is used for sealing and fixing connection to the cabin; the front end of the second connecting tube (3) faces the rear end of the cover body (1) and is sealing and fixing connection to the rear end of the cover body (1); the second connecting tube (3) is annularly arranged on the first connecting tube (2); the fixing portion (4) is used for fixing the second connecting tube (3) to the first connecting tube (2); the sealing member (5) is provided in a manner that the sealing member (5) is fixed to the rear end of the cover body (1 ... The sealing member (5) is arranged between the first connecting tube (2) and the second connecting tube (3) and is used to seal the gap between the first connecting tube (2) and the second connecting tube (3); the second connecting tube (3) comprises a first circular ring (31) connected to the rear end opening of the cover body (1) and a second circular ring (32) connected to the rear end of the first circular ring (31), and the second circular ring (32) is arranged on the first connecting tube (2); the sealing member (5) is arranged between the second circular ring (32) and the first connecting tube (2), and the fixing portion (4 ) is used to fix the second circular ring (32) to the first connecting tube (2); the outer circumference of the first connecting tube (2) is recessed to form a first annular groove (21), the inner circumference of the second circular ring (32) is recessed to form a second annular groove (321), and the first groove (21) and the second groove (321) are opposite to each other; the sealing member (5) includes a first sealing ring (51), a second sealing ring (52) and a third sealing ring (53), and the first sealing ring (51) is arranged around the first connecting tube (2). The second sealing ring (52) is an annular structure formed by protruding inward from the inner circumference of the first sealing ring (51), the second sealing ring (52) is located in the first groove (21) and has an interference fit with the first groove (21), and the third sealing ring (53) is an annular structure formed by protruding outward from the outer circumference of the first sealing ring (51), the third sealing ring (53) is located in the second groove (321) and has an interference fit with the second groove (321).

2. The offshore drainable wind turbine shroud according to claim 1, characterized in that: The sealing member (5) further comprises a fourth sealing ring (54), which is formed by protruding inward from the inner wall of the front end of the first sealing ring (51), and the front and rear side surfaces of the fourth sealing ring (54) respectively abut against the front end of the first connecting tube (2) and the rear end of the first circular ring (31).

3. The offshore drainable wind turbine shroud according to claim 1, characterized in that: The inner wall of the first circular ring (31) is recessed to form a circular water diversion groove (311), and a drainage hole (312) is provided on the first circular ring (31) at a position corresponding to the bottom of the water diversion groove (311), and the upper end of the drainage hole (312) is connected to the water diversion groove (311), and the lower end is connected to the outer surface of the first circular ring (31).

4. The offshore drainable wind turbine shroud according to claim 1, characterized in that: It also includes a conical cylinder (6), the large end of the conical cylinder (6) faces backward, the rear end edge of the conical cylinder (6) is fixedly connected to the inner edge of the front end of the first connecting cylinder (2), and the front end of the conical cylinder (6) is located inside the cover body (1).

5. The offshore drainable wind turbine shroud according to claim 1, characterized in that: The outer circumferential surface of the first connecting tube (2) is recessed to form a plurality of first screw holes (7), and the plurality of first screw holes (7) are evenly arranged along the circumferential direction. A first through hole is formed on the second circular ring (32) and the first sealing ring (51) at a position corresponding to each of the first screw holes (7); the fixing portion (4) includes a plurality of first bolts (41), and the plurality of first bolts (41) are arranged in a one-to-one correspondence in the plurality of first through holes, the screw-in ends of the first bolts (41) are screwed into the corresponding first screw holes (7), and the bolt heads of the first bolts (41) abut against the outer circumferential surface of the second circular ring (32).

6. The offshore drainable wind turbine shroud according to claim 5, characterized in that: The outer circumferential surface of the first connecting tube (2) is also recessed to form a plurality of second screw holes (8), and the plurality of second screw holes (8) are evenly arranged along the circumferential direction. A second through hole is formed on the second ring (32) and the first sealing ring (51) at a position corresponding to each second screw hole (8); the fixing portion (4) also includes a plurality of second bolts (42), and the plurality of second bolts (42) are arranged in a one-to-one correspondence in the plurality of second through holes. The screw-in ends of the second bolts (42) are screwed into the corresponding second screw holes (8), and the bolt heads of the second bolts (42) abut against the outer circumferential surface of the second ring (32). The second screw holes (8) and the first screw holes (7) are respectively located in front and behind the first groove (21).

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