Fixing device and mounting method and dismounting method thereof

Abstract

The invention provides a fixing device and a mounting method and a dismounting method thereof, the fixing device comprises a rope net, a connecting rope and a pulling rope, the rope net is used for wrapping the area, close to a blade tip, of a blade, and the rope net is provided with a first front opening side and a second front opening side; one end of the connecting rope is connected with the bottom end of the rope net and used for being connected with a first preset position on the wind driven generator; one end of the pulling and closing rope is connected with the tip end of the rope net, and the other end of the pulling and closing rope is used for alternately penetrating through the first opening side and the second opening side in the extending direction of the first opening side, then being wound around a second preset position on the wind driven generator, returning to an alternate penetrating area to form bottom end rope sleeve wrapping connection and then being fixedly connected to the first preset position; the pulling and closing rope is arranged to be capable of being separated from the first opening side and / or the second opening side when the end, away from the tip end of the rope net, of the pulling and closing rope is pulled. The temporary device can be conveniently and reliably disassembled and assembled through the fixing device, and the structure and components of the blade cannot be damaged.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of power generation equipment, and particularly to a fixing device, an installation method thereof, and a disassembly method thereof. Background Art

[0002] As the blades of wind turbines become longer and longer, the resulting blade vibration problems become more and more serious. Especially during the hoisting and fault repair stages of wind turbines, since the wind turbines cannot yaw and pitch, the resulting flow-induced vibrations of the blades, including vortex-induced vibrations and stall vibrations, are increasingly becoming a common problem. Currently, the main suppression solution is to install a temporary flow disturbance device on the blade surface. By disturbing the airflow movement on the blade surface through the flow disturbance device, blade vibration is suppressed, and after the wind turbine can yaw and pitch normally, the flow disturbance device is removed. However, the installation and removal of the flow disturbance device face great challenges. Especially when vortex generators and serrated trailing edges are commonly used on current blades, how to ensure that the temporary devices on the blade surface, such as the flow disturbance device, can be installed and removed conveniently and reliably without damaging the vortex generators and serrated trailing edges on the blade itself has become a common problem in the industry. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a fixing device, an installation method thereof, and a disassembly method thereof, aiming to achieve convenient and reliable disassembly and assembly of the temporary device on the blade surface of a wind turbine.

[0004] To solve the above technical problems, the embodiments of the present invention provide a fixing device, including:

[0005] A net, the net is used to wrap the area of the blade of the wind turbine near the tip. The net has a net tip near the tip, a net bottom near the root of the blade, and a first opening side and a second opening side opposite to each other in the wrapping direction of the net;

[0006] A connecting rope, one end of the connecting rope is connected to the net bottom, and the end of the connecting rope far from the net bottom is used to connect to a first preset position on the wind turbine that can be reached by personnel after hoisting.

[0007] A pulling rope, one end of the pulling rope is connected to the tip of the rope net, and the end of the pulling rope away from the tip of the rope net is used to alternately pass through the first opening side and the second opening side along the extending direction of the first opening side first, and then wind around the second preset position where personnel can reach after the wind turbine is hoisted. After returning to the alternating passing area to form a bottom rope sleeve and then connecting and fixing it to the first preset position, the first opening side and the second opening side are closed by the pulling rope; the pulling rope is set so that when the bottom rope sleeve disengages from the second preset position and the end of the pulling rope away from the tip of the rope net is pulled, the pulling rope can disengage from the first opening side and / or the second opening side to open the first opening side and the second opening side.

[0008] In some embodiments, a plurality of first perforation positions are provided on the first opening side, and the plurality of first perforation positions are arranged at intervals along the extending direction of the first opening side; a plurality of second perforation positions are provided on the second opening side, and the plurality of second perforation positions are arranged at intervals along the extending direction of the second opening side.

[0009] In some embodiments, a plurality of first rope buckles are respectively provided at the plurality of first perforation positions or a plurality of first rope buckles are formed by the mesh holes of the rope net itself, and a plurality of second rope buckles are respectively provided at the plurality of second perforation positions or a plurality of second rope buckles are formed by the mesh holes of the rope net itself; the plurality of first rope buckles and the plurality of second rope buckles are arranged in one-to-one correspondence, and the plurality of first rope buckles and the corresponding second rope buckles respectively form a plurality of rope buckle groups, so that the pulling rope passes through and connects the first opening side and the second opening side from the plurality of rope buckle groups respectively;

[0010] When the fixing device is installed on the blade, the pulling rope is set to form a plurality of threading rope sleeves corresponding to the plurality of rope buckle groups and a bottom rope sleeve corresponding to the second preset position.

[0011] In some embodiments, when the fixing device is installed on the blade, the pulling rope at each threading rope sleeve repeatedly winds around, and the pulling rope passes back and forth through at least 2 times when viewed from the middle of the threading rope sleeve, and the pulling rope in at least one of the first rope buckle and the second rope buckle passes back and forth through at least 2 times.

[0012] In some embodiments, when the fixing device is installed on the blade, the bottom rope sleeve is located on the side away from the blade tip, the bottom rope sleeve winds around the second preset position, returns to the threading rope sleeve area to wind and form the bottom rope sleeve, and then connects and fixes it to the first preset position. The pulling rope passes back and forth through at least 2 times when viewed from the middle of the bottom rope sleeve.

[0013] In some embodiments, a plurality of connecting ropes are provided at intervals along the extending direction of the bottom end of the rope net.

[0014] In some embodiments, the tip of the rope net is provided in a sleeve shape to sleeved the tip of the rope net on the leaf tip.

[0015] In some embodiments, when the fixing device is installed on the blade, the connection between the first opening side and the second opening side is located on the cylindrical surface of the blade.

[0016] To achieve the above object, the present invention further provides a method for installing a fixing device, including:

[0017] When the blade of the wind turbine is placed on the ground, cover the area of the blade near the leaf tip with the rope net so that the first opening side and the second opening side of the rope net droop.

[0018] Sleeve the tip of the rope net of the rope net on the leaf tip, and connect the connecting rope to the leaf root of the blade.

[0019] Wind the pulling rope according to claim 3, wherein the threading rope sleeve is wound on site or pre-wound in the factory and then connected to the rope net on site; after the threading rope sleeve is wound, one end of the pulling rope is connected to the tip of the rope net of the rope net, and the other end of the pulling rope is wound around the leaf root to form a bottom end rope sleeve and then tightened so that the first opening side and the second opening side are closed and fixed at the leaf root.

[0020] When the blade is installed on the hub of the wind turbine, untie the end of the connecting rope connected to the leaf root and connect it to the first preset position on the wind turbine where personnel can reach after hoisting, and untie the end of the pulling rope connected to the leaf root, disconnect the bottom end rope sleeve at the leaf root, and then re-form the bottom end rope sleeve by sleeving around the second preset position on the wind turbine where personnel can reach after hoisting, and then tighten and fix it at the first preset position on the wind turbine where personnel can reach after hoisting.

[0021] To achieve the above object, the present invention further provides a method for disassembling a fixing device, including:

[0022] Rotate the hub of the wind turbine until the blade is close to horizontal so that the first opening side and the second opening side of the rope net on the blade face downward.

[0023] Unfasten one end of the pulling rope connected to the first preset position on the wind turbine where personnel can reach after hoisting, and detach the bottom rope sleeve from the second preset position on the wind turbine where personnel can reach after hoisting. Then, pull the pulling rope in the direction opposite to the direction of the rope net to open the first opening side and the second opening side.

[0024] Unfasten one end of the connecting rope connected to the first preset position, and rotate the blade to let the rope net slide off the blade.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The fixing device of the present invention can be used as an installation carrier for temporary devices on the surface of the blade such as a spoiler device. Compared with the non-opening net sleeve structure, the fixing device is designed with an opening net sleeve structure, and the installation will be more convenient; the rope net is circumferentially fixed by the pulling rope, and the bottom rope sleeve can be detached at the position where personnel can reach and one end can be pulled to automatically loosen, making the removal of the fixing device more convenient; by rotating the angle of the blade, the rope net on the blade can automatically slide off based on its own gravity, and the structure and components of the blade itself will not be damaged due to pulling. In this way, the temporary device can be disassembled and installed conveniently and reliably through the fixing device, and the structure and components of the blade itself will not be damaged. Description of the Drawings

[0027] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0028] Figure 1 It is a schematic structural view of the fixing device installed on the blade in the embodiment of the present invention;

[0029] Figure 2 It is Figure 1 The schematic structural view after the rope net in

[0030] Figure 3 It is Figure 1 The sectional view taken along the A-A section in

[0031] Figure 4 It is Figure 1 The schematic structural view at the pulling rope in

[0032] Figure 5 It is Figure 1 The schematic structural view after the pulling rope is loosened in

[0033] Figure 6 It is Figure 1Schematic diagram of the structure where the fixing device slips off the blade.

[0034] Description of the reference numerals in the present invention:

[0035] Fixing device 100, netting 1, netting tip 11, netting bottom end 12, first opening side 13, second opening side 14, connecting rope 2, pulling rope 3, threading rope sleeve 31, tip rope sleeve 32, bottom end rope sleeve 33, rope buckle group 4, first rope buckle 41a, second rope buckle 41b, blade 200, blade tip 210, blade root 220, leading edge of the blade 230, trailing edge of the blade 240, hub 300.

[0036] The realization of the purpose, functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0037] As can be seen from the background art, it is necessary to provide a fixing device to realize the convenient and reliable disassembly and assembly of the temporary device on the surface of the blade of a wind turbine, and without damaging the structure and components of the blade itself.

[0038] The fixing device of the present invention can be used as an installation carrier for temporary devices such as flow control devices on the surface of the blade. Compared with the non-opening net sleeve structure, the fixing device adopts the opening net sleeve structure design, and the installation will be more convenient; the netting is circumferentially fixed by the pulling rope, and by disconnecting the bottom end rope sleeve at a position accessible to personnel and pulling one end, it can be automatically loosened, making the removal of the fixing device more convenient; by rotating the angle of the blade, the netting on the blade can automatically slip off due to its own gravity, and the structure and components of the blade itself will not be damaged due to pulling. In this way, the temporary device can be conveniently and reliably disassembled and assembled through the fixing device, and the structure and components of the blade itself will not be damaged.

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0040] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The present invention provides a fixing device. Figures 1 to 6 Fig. shows a preferred embodiment of the fixing device provided by the present invention.

[0043] Please refer to Figures 1 to 6 , in this embodiment, the fixing device 100 includes a net 1, a connecting rope 2, and a pulling rope 3. The net 1 is used to wrap the area of the blade 200 of the wind turbine near the blade tip 210. The net 1 has a net tip 11 near the blade tip 210, a net bottom end 12 near the blade root 220 of the blade 200, and a first opening side 13 and a second opening side 14 opposite to each other in the wrapping direction of the net 1. One end of the connecting rope 2 is connected to the net bottom end 12, and the end of the connecting rope 2 away from the net bottom end 12 is used to connect to a first preset position on the wind turbine where personnel can reach after hoisting. One end of the pulling rope 3 is connected to the net tip 11. The end of the pulling rope 3 away from the net tip 11 is first used to alternately pass through the first opening side 13 and the second opening side 14 along the extending direction of the first opening side 13, then wind around a second preset position on the wind turbine where personnel can reach after hoisting, and then return to alternately pass through the area to form a bottom rope sleeve 33 of the pulling rope for winding and then connect and fix to the first preset position, so as to close the first opening side 13 and the second opening side 14 through the pulling rope 3. The pulling rope 3 is arranged such that when the bottom rope sleeve 33 of the pulling rope at the second preset position is disengaged and the end of the pulling rope 3 away from the net tip 11 is pulled, the pulling rope 3 can disengage from the first opening side 13 and / or the second opening side 14, so as to open the first opening side 13 and the second opening side 14.

[0044] Specifically, the wind turbine includes a blade 200 and a hub 300. One end of the blade 200 is connected to the hub 300, so that the hub 300 can drive the blade 200 to rotate. One end of the blade 200 near the hub 300 is the blade root 220, and the end of the blade 200 away from the hub 300 is the blade tip 210. The blade 200 has a leading edge 230 and a trailing edge 240 opposite to each other in the rotation direction of the blade 200. The leading edge 230 and the trailing edge 240 are located between the blade tip 210 and the blade root 220.

[0045] The fixing device 100 is detachably arranged on the surface of the blade 200. The fixing device 100 can be used as an installation carrier for temporary devices such as a flow spoiler on the surface of the blade 200, so that the temporary device can be detachably arranged on the surface of the blade 200 through the fixing device 100. Hereinafter, taking the fixing device 100 as an installation carrier for a flow spoiler as an example, for example, the flow spoiler can be installed on the rope net 1 to suppress the vibration of the blade 200.

[0046] The rope net 1 adopts an open-front net sleeve structure, and the rope net 1 can wrap the area of the blade 200 near the blade tip 210. When the rope net 1 is wrapped around the blade 200, the rope net tip 11 and the rope net bottom end 12 of the rope net 1 are opposite in the length direction of the blade 200 (i.e., the direction from the blade tip 210 to the blade root 220), and the rope net bottom end 12 is closer to the blade root 220 than the rope net tip 11. And the first open-front side 13 and the second open-front side 14 of the rope net 1 are located between the rope net tip 11 and the rope net bottom end 12, and the first open-front side 13 and the second open-front side 14 are opposite in the wrapping direction of the rope net 1 (i.e., the circumferential or circumferential direction of the blade 200). In this way, when the rope net 1 is wrapped around the blade 200, the first open-front side 13 and the second open-front side 14 of the rope net 1 can droop to any generatrix on the cylindrical (side) surface of the blade 200, for example, at the leading edge 230 or the trailing edge 240 of the blade. At this time, the first open-front side 13 and the second open-front side 14 of the rope net 1 can be sewn together by the lacing cord 3 to make the rope net 1 close into a sleeve shape and be fixed on the surface of the blade 200.

[0047] One end of the lacing cord 3 is connected to the rope net tip 11, and the other end of the lacing cord 3 can alternately pass through the first open-front side 13 and the second open-front side 14 back and forth along the extension direction of the first open-front side 13 (i.e., the length direction of the blade 200, which is also the extension direction of the second open-front side 14), so as to sew and fix the first open-front side 13 and the second open-front side 14. Hereinafter, it is defined that the lacing cord 3 has a first end and a second end opposite in the length direction of the lacing cord 3. The end of the lacing cord 3 connected to the rope net tip 11 is the first end of the lacing cord 3, and the end of the lacing cord 3 connected to the hub 300 is the second end of the lacing cord 3.

[0048] When the fixing device 100 is installed on the blade 200, the first end of the pulling rope 3 is fixedly connected to the tip 11 of the rope net. The second end of the pulling rope 3 passes through the first opening side 13 and the second opening side 14 in a certain way. After the first opening side 13 and the second opening side 14 are stitched and fixed, it extends along the blade 200 towards the hub 300. Finally, the second end of the pulling rope 3 is first wound around the second preset position on the wind turbine that personnel can reach after hoisting, and then returns to the bottom 12 area of the rope net. After forming a bottom rope loop in a certain way, it is connected and fixed to the first preset position on the wind turbine that personnel can reach after hoisting. Among them, after the wind turbine is hoisted, an operation platform is usually set at the top of the wind turbine. The first preset position and the second preset position are the positions on the wind turbine that personnel can reach when standing on the operation platform. For example, the first preset position can be the hub 300 or other components that personnel can reach after the wind turbine is hoisted. Below, the first preset position being the hub 300 will be taken as an example for introduction. The second preset position can be the blade root 220 or the hub 300 or other components that personnel can reach after the wind turbine is hoisted. Optionally, please refer to Figure 4 , in this embodiment, studs or other protruding columns are provided at the connection between the blade root 220 and the hub 300, and the protruding columns can be used as the preset winding positions. And when the first opening side 13 and the second opening side 14 of the rope net 1 are stitched by the pulling rope 3, after first detaching the bottom rope loop 33 wound around the second preset position between the blade root 220 and the hub 300, then detaching the second end of the pulling rope 3 from the hub 300, and pulling the second end of the pulling rope 3 outwards (i.e., towards the direction of the hub 300), the part of the pulling rope 3 that stitches the first opening side 13 and the second opening side 14 can be drawn out from between the first opening side 13 and / or the second opening side 14, so that the pulling rope 3 is detached from the first opening side 13 and / or the second opening side 14, allowing the first opening side 13 and the second opening side 14 to automatically open. Among them, when the first opening side 13 and the second opening side 14 are opened, the pulling rope 3 can be detached from the first opening side 13 and connected to the second opening side 14; the pulling rope 3 can also be detached from the second opening side 14 and connected to the first opening side 13; the pulling rope 3 can also be detached from the first opening side 13 and the second opening side 14. Below, the example where the pulling rope 3 is detached from the first opening side 13 and the second opening side 14 when the first opening side 13 and the second opening side 14 are opened will be taken as an example for introduction.

[0049] The bottom end 12 of the net 1 is provided with a connecting rope 2. One end of the connecting rope 2 is connected to the bottom end 12 of the net, and the other end of the connecting rope 2 is used to connect to the hub 300. Hereinafter, it is defined that the connecting rope 2 has a first end and a second end opposite to each other in the length direction of the connecting rope 2. The end of the connecting rope 2 connected to the bottom end 12 of the net is the first end of the connecting rope 2, and the end of the connecting rope 2 connected to the hub 300 is the second end of the connecting rope 2. When the fixing device 100 is installed on the blade 200, the first end of the connecting rope 2 is fixedly connected to the bottom end 12 of the net, and the second end of the connecting rope 2 is fixedly connected to the hub 300. In this way, through the connecting rope 2 and the pulling rope 3, the net 1 installed on the blade 200 can be fixedly limited in the direction from the blade tip 210 to the blade root 220.

[0050] The fixing device 100 of the present invention can be used as an installation carrier for temporary devices on the surface of the blade 200 such as a spoiler device. Compared with the non-open net sleeve structure, the fixing device 100 adopts an open net sleeve structure design, and the installation will be more convenient; the net 1 is circumferentially fixed by the pulling rope 3, and one end can be automatically loosened by pulling, so that the removal of the fixing device 100 will be more convenient; by rotating the angle of the blade 200, the net 1 on the blade 200 can automatically slide down based on its own gravity, and the structure and components of the blade 200 itself will not be damaged due to pulling. In this way, the temporary device can be disassembled and assembled conveniently and reliably through the fixing device 100, and the structure and components of the blade 200 itself will not be damaged.

[0051] Hereinafter, the embodiments of the present invention will be described in more detail with reference to the drawings.

[0052] The net 1 can wrap the area of the blade 200 near the blade tip 210, that is, when the fixing device 100 is installed on the blade 200, the distance from the net tip 11 to the blade tip 210 is less than the distance from the net bottom end 12 to the blade root 220. For example, the net 1 can wrap the entire blade tip 210 or part of the blade tip 210. Optionally, please refer to Figures 1 to 4 In this embodiment, the net tip 11 is provided in a sleeve shape to sleeved the net tip 11 on the blade tip 210. In this way, when the net 1 is installed on the blade 200, the net tip 11 can sleeved the blade tip 210, thereby realizing the installation positioning between the net 1 and the blade tip 210. Hereinafter, the case where the net tip 11 can sleeved the blade tip 210 will be taken as an example for introduction.

[0053] Optionally, please refer to Figures 1 to 4, in this embodiment, when the fixing device 100 is installed on the blade 200, the connection position between the first opening side 13 and the second opening side 14 is located on the cylindrical surface of the blade 200. Thus, when the netting 1 is wrapped around the blade 200, the connection position between the first opening side 13 and the second opening side 14 is located on the cylindrical surface of the blade 200, for example, the leading edge 230 of the blade, the trailing edge 240 of the blade, or any cylindrical generatrix of the blade 200. For example, when the fixing device 100 is installed on the blade 200, the connection position between the first opening side 13 and the second opening side 14 is located on the side of the leading edge 230 of the blade away from the trailing edge 240 of the blade 200. Thus, when the netting 1 is wrapped around the blade 200 and the leading edge 230 of the blade 200 is facing downwards, the first opening side 13 and the second opening side 14 of the netting 1 can droop to the lower side of the leading edge 230, thereby facilitating the stitching and fixing of the first opening side 13 and the second opening side 14 through the lacing cord 3.

[0054] A connecting cord 2 is provided at the bottom end 12 of the netting 1 of the netting 1, and one or more connecting cords 2 can be provided. Optionally, please refer to Figures 1 to 4 , in this embodiment, a plurality of connecting cords 2 are provided at intervals along the extending direction of the bottom end 12 of the netting 1. The extending direction of the bottom end 12 of the netting 1 is the circumferential direction of the blade 200. A plurality of connecting cords 2 are provided at intervals. The first ends of the plurality of connecting cords 2 are fixedly connected to the bottom end 12 of the netting 1, and the second ends of the plurality of connecting cords 2 are all used for fixedly connecting to the hub 300. Thus, the netting 1 can be firmly fixed on the blade 200 through the plurality of connecting cords 2.

[0055] The lacing cord 3 alternately passes through the first opening side 13 and the second opening side 14 to stitch the first opening side 13 and the second opening side 14. The lacing cord 3 can pass through the first opening side 13 and the second opening side 14 from the mesh holes of the netting 1; or cord buckles or cord loops for the lacing cord 3 to pass through can be provided on the first opening side 13 and the second opening side 14.

[0056] Optionally, please refer to Figures 1 to 4 , in this embodiment, a plurality of first perforation positions are provided on the first opening side 13, and the plurality of first perforation positions are arranged at intervals along the extending direction of the first opening side 13 to allow the lacing cord 3 to pass through the first opening side 13 from the plurality of first perforation positions respectively; a plurality of second perforation positions are provided on the second opening side 14, and the plurality of second perforation positions are arranged at intervals along the extending direction of the second opening side 14 to allow the lacing cord 3 to pass through the second opening side 14 from the plurality of second perforation positions respectively. The plurality of mesh holes at the first opening side 13 form the plurality of first perforation positions, while the plurality of mesh holes at the second opening side 14 form the plurality of second perforation positions.

[0057] Optionally, please refer to Figures 1 to 4, in this embodiment, a plurality of first perforation positions are respectively provided with a plurality of first rope buckles 41a, so that the lacing ropes 3 respectively pass through the first opening side 13 from the plurality of first rope buckles 41a; a plurality of second perforation positions are respectively provided with a plurality of second rope buckles 41b, so that the lacing ropes 3 respectively pass through the second opening side 14 from the plurality of second rope buckles 41b.

[0058] Specifically, after the second end of the lacing rope 3 passes through the plurality of first rope buckles 41a and the plurality of second rope buckles 41b in a certain way, the first opening side 13 and the second opening side 14 can be stitched and fixed by the lacing rope 3. The first rope buckles 41a and the second rope buckles 41b can be produced separately from the rope net 1. The first rope buckles 41a, the second rope buckles 41b and the lacing ropes 3 can be wound and formed together in the factory. When installing, as long as the first rope buckles 41a and the second rope buckles 41b are fixed on the rope net 1, thus making the installation of the rope net 1 more convenient, and the winding quality of the lacing ropes 3 can also be guaranteed.

[0059] Further, please refer to Figures 1 to 4 , in this embodiment, the plurality of first rope buckles 41a and the plurality of second rope buckles 41b are arranged in one-to-one correspondence, and the plurality of first rope buckles 41a and the corresponding second rope buckles 41b form a plurality of rope buckle groups 4; when the fixing device 100 is installed on the blade 200, the lacing ropes 3 correspondingly form a plurality of threading rope sleeves 31 and a bottom-end rope sleeve 33 corresponding to the second preset position for the plurality of rope buckle groups 4.

[0060] Optionally, please refer to Figures 1 to 4 , in this embodiment, when the fixing device 100 is installed on the blade 200, the lacing rope 3 at each threading rope sleeve 31 winds repeatedly, and the lacing rope 3 passes back and forth through at least 2 times in the middle of the threading rope sleeve 31, and the lacing rope 3 in at least one of the first rope buckle 41a and the second rope buckle 41b passes back and forth through at least 2 times.

[0061] Specifically, the middle of each threading rope sleeve 31 passes through a corresponding rope buckle group 4 toward the direction of the blade root 220, and the start end and the end of each threading rope sleeve 31 pass through a corresponding rope buckle group 4 toward the direction of the blade tip 210; the start end and the end of the one far from the blade tip 210 among any two adjacent threading rope sleeves 31 pass through the middle of the other one toward the direction of the blade tip 210 and extend to the side of the plurality of rope buckle groups 4 close to the leading edge 230 of the blade; the start end of the one far from the blade tip 210 among any two adjacent threading rope sleeves 31 is connected to the end of the other one.

[0062] The first opening side 13 and the second opening side 14 are respectively provided with the same number of first rope buckles 41a and second rope buckles 41b. Each first rope buckle 41a is opposite to a corresponding second rope buckle 41b in the wrapping direction of the rope net 1. Thus, when the fixing device 100 is installed on the blade 200, each first rope buckle 41a and a corresponding second rope buckle 41b approach each other and are opposite in the extending direction of the first opening side 13, thereby forming a rope buckle group 4. In this way, multiple first rope buckles 41a and multiple second rope buckles 41b are paired one by one, thereby forming multiple rope buckle groups 4 arranged at intervals in the extending direction of the first opening side 13.

[0063] When the fixing device 100 is installed on the blade 200, each turn of the pulling rope 3 in the extending direction of the first opening side 13 will form a rope loop. The pulling rope 3 forms multiple sequentially connected threading rope loops 31, and the multiple threading rope loops 31 are arranged in one-to-one correspondence with the multiple rope buckle groups 4. After the pulling rope 3 passes through a rope buckle group 4 from the side close to the blade tip 210 of the rope buckle group 4, it then passes through the rope buckle group 4 in the reverse direction from the side away from the blade tip 210 of the rope buckle group 4, thereby forming a threading rope loop 31 corresponding to the rope buckle group 4. Hereinafter, the side of the rope buckle group 4 close to the blade tip 210 is defined as the right side of the rope buckle group 4, and the side of the rope buckle group 4 away from the blade tip 210 is defined as the left side of the rope buckle group 4.

[0064] Each threading rope loop 31 has a start end and an end end opposite to each other in the extending direction of the pulling rope 3. The start end of each threading rope loop 31 is closer to the first end of the pulling rope 3 than the end end. The middle part of each threading rope loop 31 (i.e., the turning part of each threading rope loop 31) passes through a corresponding rope buckle group 4 towards the left, and the start end and the end end of the threading rope loop 31 located on the left side of this threading rope loop 31 pass through the middle part of this threading rope loop 31. The start end and the end end of each threading rope loop 31 pass through a corresponding rope buckle group 4 towards the right and extend between the rope buckle group 4 and the leading edge 230 of the blade. The start end of this threading rope loop 31 is connected to the end end of the threading rope loop 31 located on the right side of this threading rope loop 31, and the end end of this threading rope loop 31 is connected to the start end of the threading rope loop 31 located on the left side of this threading rope loop 31. Thus, when the second end of the pulling rope 3 is pulled, the multiple threading rope loops 31 can respectively escape from the multiple rope buckle groups 4 to realize the opening of the rope net 1.

[0065] The specific shape of the threading rope loop 31 can be set according to the actual situation. For example, please refer to Figures 1 to 4, in this embodiment, from the starting end to the ending end of the threading rope sleeve 31, the threading rope sleeve 31 first passes through the rope buckle group 4 from the right side of the rope buckle group 4 and from the side of the rope buckle group 4 close to the blade leading edge 230 towards the left, and extends to the left side of the rope buckle group 4, thereby forming the first section of the threading rope sleeve 31; then it bends and extends towards the direction of the blade leading edge 230 and towards the right, so as to pass through the rope buckle group 4 towards the right, and extends to the right side of the rope buckle group 4 and extends to the side of the rope buckle group 4 close to the blade leading edge 230, thereby forming the second section of the threading rope sleeve 31. The second section of the threading rope sleeve 31 is located on the left side of the first section; finally, it bends and extends towards the left, thereby forming the third section of the threading rope sleeve 31.

[0066] Optionally, please refer to Figures 1 to 4 , in this embodiment, when the fixing device 100 is installed on the blade 200, the pulling rope 3 forms a tip rope sleeve 32. The tip rope sleeve 32 is located on the side of the plurality of threading rope sleeves 31 close to the blade tip 210. The starting end and the ending end of the one of the plurality of threading rope sleeves 31 closest to the tip rope sleeve 32 pass through the middle of the tip rope sleeve 32 towards the direction of the blade tip 210, and extend to the side of the plurality of rope buckle groups 4 close to the blade leading edge 230. The starting end of the one of the plurality of threading rope sleeves 31 closest to the tip rope sleeve 32 is connected to the ending end of the tip rope sleeve 32, and the starting end of the tip rope sleeve 32 is connected to the rope net tip 11.

[0067] Specifically, the tip rope sleeve 32 has a starting end and an ending end that are opposite in the extending direction of the pulling rope 3. The starting end of the tip rope sleeve 32 forms the first end of the pulling rope 3. The tip rope sleeve 32 is located on the right side of the plurality of threading rope sleeves 31, and the starting end and the ending end of the rightmost threading rope sleeve 31 pass through the middle of the tip rope sleeve 32 (i.e., the turning point of the tip rope sleeve 32) towards the right, and the starting end of the rightmost threading rope sleeve 31 is connected to the ending end of the tip rope sleeve 32. Thus, when the second end of the pulling rope 3 is pulled, the tip rope sleeve 32 can also be automatically untied.

[0068] The specific shape of the tip rope sleeve 32 can be set according to the actual situation. For example, please refer to Figures 1 to 4 , in this embodiment, from the starting end to the ending end of the tip rope sleeve 32, the tip rope sleeve 32 first extends from the rope net tip 11 to the right side of the rightmost rope buckle group 4, thereby forming the first section of the tip rope sleeve 32; then it bends and extends towards the direction of the blade leading edge 230 and towards the right, thereby forming the second section of the tip rope sleeve 32. The second section of the tip rope sleeve 32 is located on the left side of the first section; finally, it bends and extends towards the left, thereby forming the third section of the tip rope sleeve 32.

[0069] Optionally, please refer to Figures 1 to 4 , in this embodiment, when the fixing device 100 is installed on the blade 200, the middle part of the bottom-end rope sleeve 33 is wound around the second preset position, returns to the area of the threading rope sleeve 31, and then is connected and fixed to the first preset position. The pulling rope 3 passes through the middle part of the bottom-end rope sleeve 33 back and forth at least 2 times.

[0070] Specifically, the lashing rope 3 forms a bottom end rope loop 33, and the bottom end rope loop 33 is located on the side of the plurality of threading rope loops 31 away from the blade tip 210. The start end and the end of the bottom end rope loop 33 pass through the middle of the one closest to the bottom end rope loop 33 among the plurality of threading rope loops 31 in the direction towards the blade tip 210, and extend to the side of the plurality of rope buckle groups 4 close to the leading edge 230 of the blade. The start end of the bottom end rope loop 33 is connected to the end of the one closest to the bottom end rope loop 33 among the plurality of threading rope loops 31, the end of the bottom end rope loop 33 is connected to the hub 300, and the middle of the bottom end rope loop 33 is sleeved on the connection part between the blade root 220 and the hub 300.

[0071] The bottom end rope loop 33 has a start end and an end opposite to each other in the extending direction of the lashing rope 3, and the end of the bottom end rope loop 33 forms the second end of the lashing rope 3. The bottom end rope loop 33 is located on the left side of the plurality of threading rope loops 31. The start end and the end of the bottom end rope loop 33 pass through the middle of the leftmost threading rope loop 31 towards the right, and the middle of the bottom end rope loop 33 (i.e., the turning part of the bottom end rope loop 33) is sleeved on the connection part between the blade root 220 and the hub 300.

[0072] The specific shape of the bottom end rope loop 33 can be set according to the actual situation. For example, please refer to Figures 1 to 4 , in this embodiment, from the start end to the end of the bottom end rope loop 33, the bottom end rope loop 33 first passes through the middle of the leftmost threading rope loop 31 from the side close to the leading edge 230 of the leftmost threading rope loop 31 towards the left, and extends to the left side of the leftmost threading rope loop 31, thereby forming the first section of the bottom end rope loop 33; then bends and extends towards the leading edge 230 of the blade and towards the right, so as to pass through the middle of the leftmost threading rope loop 31 towards the right, and extends to the side of the rope buckle group 4 close to the leading edge 230 of the blade, thereby forming the second section of the bottom end rope loop 33. The second section of the bottom end rope loop 33 is located on the left side of the first section; finally, it bends and extends towards the left, thereby forming the third section of the bottom end rope loop 33.

[0073] Correspondingly, another embodiment of the present invention further provides an installation method for the fixing device, which can be realized based on the fixing device provided in the above embodiment to install the fixing device on the blade. The installation method provided in another embodiment of the present invention will be described in detail below. For the same or corresponding parts as those in the previous embodiment, reference can be made to the corresponding description of the previous embodiment, and details will not be repeated below.

[0074] The installation method includes the following steps:

[0075] Step S710: When the blade of the wind turbine is placed on the ground with the leading edge of the blade facing downwards, cover the area of the blade close to the blade tip with the rope net, so that the first open side and the second open side of the rope net droop.

[0076] Step S720: Place the tip of the rope net over the leaf tip, and connect the connecting rope to the leaf root of the blade.

[0077] Specifically, before the blade 200 is installed on the hub 300, first place the blade 200 on the ground with the trailing edge 240 of the blade facing upward and the leading edge 230 facing downward. Symmetrically cover the open rope net 1 over the blade 200. The two ends of the rope net 1 equipped with rope buckles (i.e., the first open side 13 and the second open side 14) hang down to the lower side of the leading edge 230. The first rope buckles 41a and the second rope buckles 41b on the first open side 13 and the second open side 14 are paired one by one. The tip 11 of the rope net covers the leaf tip 210, and the second end of the connecting rope 2 is connected to the leaf root 220.

[0078] Step S730: Wind the pulling rope in the manner provided in the above embodiment. Among them, the threading rope sleeve is wound on-site or pre-wound in the factory and then connected to the rope net 1 on-site; after the threading rope sleeve is wound, one end of the pulling rope is connected to the tip of the rope net, and the other end of the pulling rope forms a bottom rope sleeve after winding around the leaf root and is tightened to close the first open side and the second open side and fix them at the leaf root.

[0079] Specifically, wind the pulling rope 3 in the Figure 4 method shown, passing through each rope buckle of the rope net 1 (i.e., the first rope buckle 41a and the second rope buckle 41b). A pair of rope buckles (i.e., a rope buckle group 4) is within one winding rope sleeve (i.e., the threading rope sleeve 31). After passing through each rope buckle, the first end of the pulling rope 3 is connected to the tip 11 of the rope net, and the second end of the pulling rope 3 forms a bottom rope sleeve 33 that winds around a fixed position (i.e., the second preset position) of the leaf root 220 and then is tightened and connected to the leaf root 220.

[0080] Step S740: When the blade is installed on the hub of the wind turbine, untie the end of the connecting rope connected to the leaf root and connect it to the hub. After untying the end of the pulling rope connected to the leaf root, disconnect the bottom rope sleeve at the leaf root, and then wind it around the second preset position where personnel can reach after the wind turbine is hoisted to re-form the bottom rope sleeve, and then tighten and fix it at the first preset position where personnel can reach after the wind turbine is hoisted.

[0081] Specifically, according to the normal blade 200 hoisting process, when the blade 200 is installed on the hub 300, untie the connecting rope 2 and the second end of the pulling rope 3 that were previously connected to the leaf root 220 and reliably connect them to the appropriate positions on the hub 300.

[0082] Correspondingly, another embodiment of the present invention further provides a method for disassembling a fixing device, which can be implemented based on the fixing device provided in the above embodiment to disassemble the fixing device from the blade. The following will detail the disassembling method provided in another embodiment of the present invention. For the same or corresponding parts as those in the previous embodiment, reference can be made to the corresponding description in the previous embodiment, and no detailed description will be given below.

[0083] The disassembling method includes the following steps:

[0084] Step S810: Rotate the hub of the wind turbine until the blade is close to horizontal, so that the first opening side and the second opening side of the net on the blade face downward.

[0085] Specifically, first rotate the wind wheel of the wind turbine so that the blade 200 corresponding to the net to be disassembled rotates to the horizontal position. Then, through the blade pitch system of the wind turbine, rotate the blade 200 so that the first opening side 13, the second opening side 14 of the net 1 on the blade 200, and the lacing cord 3 are vertically downward.

[0086] Step S820: Untie the end of the lacing cord connected to the first preset position on the wind turbine where personnel can reach after hoisting, and disconnect the bottom rope sleeve at the second preset position on the wind turbine where personnel can reach after hoisting. Then, pull the lacing cord in the direction opposite to the direction of the net to open the first opening side and the second opening side.

[0087] Specifically, please refer to Figure 5 , untie the second end of the lacing cord 3, and pull the second end of the lacing cord 3 outward to loosen the lacing cord 3. The buckle of the net 1 can automatically disengage from the lacing cord 3, thereby realizing the opening of the net 1.

[0088] Step S830: Untie the end of the connecting cord connected to the first preset position, and rotate the blade to let the net slide off the blade.

[0089] Specifically, please refer to Figure 6 , untie the second end of the connecting cord 2, and rotate the blade 200 through the blade pitch system. The opened net 1 can automatically slide off the blade 200 due to its own gravity, and thus the removal can be completed.

[0090] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A fixing device, characterized in that, Comprising: A net, the net is used to wrap the area near the tip of the blade of a wind turbine. The net has a net tip near the tip, a net bottom end near the root of the blade, and a first opening side and a second opening side opposite to each other in the wrapping direction of the net. A connecting rope, one end of the connecting rope is connected to the net bottom end, and the other end of the connecting rope away from the net bottom end is used to connect to a first preset position on the wind turbine where personnel can reach after hoisting. A closing rope, one end of the closing rope is connected to the net tip. The other end of the closing rope away from the net tip is first used to alternately pass through the first opening side and the second opening side along the extending direction of the first opening side, then wind around a second preset position on the wind turbine where personnel can reach after hoisting, and then return to the alternating passing area to form a bottom rope loop and then connect and fix to the first preset position, so as to close the first opening side and the second opening side through the closing rope. The closing rope is arranged such that when the bottom rope loop disengages from the second preset position and the end of the closing rope away from the net tip is pulled, the closing rope can disengage from the first opening side and / or the second opening side, so as to open the first opening side and the second opening side.

2. The fixing device according to claim 1, characterized in that, The first opening side is provided with a plurality of first perforation positions, and the plurality of first perforation positions are arranged at intervals along the extending direction of the first opening side; the second opening side is provided with a plurality of second perforation positions, and the plurality of second perforation positions are arranged at intervals along the extending direction of the second opening side.

3. The fixing device according to claim 2, characterized in that, A plurality of first rope buckles are respectively arranged at the plurality of first perforation positions or a plurality of first rope buckles are formed by the mesh holes of the net itself, and a plurality of second rope buckles are respectively arranged at the plurality of second perforation positions or a plurality of second rope buckles are formed by the mesh holes of the net itself; the plurality of first rope buckles and the plurality of second rope buckles are arranged in one-to-one correspondence, and the plurality of first rope buckles respectively form a plurality of rope buckle groups with the corresponding second rope buckles, so that the closing rope respectively passes through the plurality of rope buckle groups to connect the first opening side and the second opening side. When the fixing device is installed on the blade, the closing rope is arranged to form a plurality of threading rope loops corresponding to the plurality of rope buckle groups and a bottom rope loop corresponding to the second preset position.

4. The fixing device according to claim 3, characterized in that, When the fixing device is installed on the blade, the closing rope at each threading rope loop repeatedly winds around, and the closing rope passes back and forth through at least 2 times in the middle of the threading rope loop, and the closing rope in at least one of the first rope buckle and the second rope buckle passes back and forth through at least 2 times.

5. The fixing device according to claim 3, characterized in that, When the fixing device is installed on the blade, the bottom rope loop is located on the side away from the tip. The bottom rope loop winds around the second preset position, returns to the threading rope loop area to wind around to form the bottom rope loop and then connects and fixes to the first preset position, and the closing rope passes back and forth through at least 2 times in the middle of the bottom rope loop.

6. The fixing device according to claim 1, characterized in that, A plurality of the connecting ropes are arranged at intervals along the extending direction of the net bottom end.

7. The fixing device according to claim 1, characterized in that, The tip of the net is provided in a sleeve shape to sleevethe tip of the net on the leaf tip.

8. The fixing device according to claim 1, characterized in that, When the fixing device is installed on the blade, theconnection between the first opening side and the second opening side islocated on the cylindrical surface of the blade.

9. A method for installing a fixing device, characterized in that, Comprising: When the blade of the wind turbine is placed on the ground,cover the area of the blade near the leaf tip with a net, so that the firstopening side and the second opening side of the net droop; Sleeve the tip of the net on the leaf tip, and connect theconnecting rope to the leaf root of the blade; Wind the pulling rope according to claim 3, wherein thebutton-through rope sleeve is wound on-site or pre-wound in the factory andthen connected to the net on-site; after the button-through rope sleeve iswound, one end of the pulling rope is connected to the tip of the net, and theother end of the pulling rope is wound around the leaf root to form a bottomrope sleeve and then tightened, so that the first opening side and the secondopening side are closed and fixed at the leaf root; When the blade is installed on the hub of the wind turbine,untie the end of the connecting rope connected to the leaf root and connect itto the first preset position on the wind turbine where personnel can reach afterhoisting, and after untying the end of the pulling rope connected to the leafroot, disconnect the bottom rope sleeve at the leaf root, then wind it aroundthe second preset position on the wind turbine where personnel can reach afterhoisting to re-form the bottom rope sleeve, and then tighten and fix it at thefirst preset position on the wind turbine where personnel can reach afterhoisting.

10. A disassembly method for a fixing device, characterized in that, Comprising: Rotate the hub of the wind turbine until the blade is closeto horizontal, so that the first opening side and the second opening side ofthe net on the blade face downward; Untie the end of the pulling rope connected to the firstpreset position on the wind turbine where personnel can reach after hoisting,and disconnect the bottom rope sleeve at the second preset position on thewind turbine where personnel can reach after hoisting, and then pull thepulling rope in the direction opposite to the direction of the net, so thatthe first opening side and the second opening side are opened; Untie the end of the connecting rope connected to the firstpreset position, and rotate the blade to make the net slide off the blade.

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