A wind turbine blade

Abstract

The present invention discloses a wind turbine blade, wherein a connecting pin is fixedly connected to the upper surface of the blade, a guide rod is arranged at the bottom of the connecting pin, and a square box is fixedly connected to the outer surface of the guide rod. The present invention relates to the field of support and filling technology. The present invention arranges a guide rod, and when the device is in use, the guide rod is inserted into the interior of the blade, and the square box and the outer edge tube are inserted in sequence along the outer surface of the guide rod. Under the joint action of the fitting device and the supporting device, the cavity inside the blade is supported and filled. Since the square box and the outer edge tube both adopt hollow structures, the weight of the blade itself can be effectively reduced while ensuring sufficient supporting effect, which is convenient for the subsequent rotation, power generation and subsequent maintenance of the blade. After the equipment is installed inside the blade, the blade is connected to the wind turbine through the connecting pin, which solves the problem of poor internal structural strength of traditional hollow wind turbine blades.

Description

Technical Field

[0001] The invention relates to the technical field of support filling, and in particular to a wind turbine blade and a preparation method thereof. Background Art

[0002] A wind turbine is an electric device that converts wind energy into mechanical work, which drives the rotor to rotate and finally outputs alternating current. A wind turbine generally consists of a wind wheel, a generator, a rectifier, a tower, a speed limit safety mechanism, and an energy storage device.

[0003] The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then increase the speed of rotation through a speed increaser to drive the generator to generate electricity. According to the current wind turbine technology, it can start generating electricity with a breeze speed of about three meters per second. The working principle of a wind turbine is relatively simple. The wind wheel rotates under the action of wind power, and it converts the kinetic energy of the wind into the mechanical energy of the wind wheel shaft. The generator rotates and generates electricity under the drive of the wind wheel shaft. Broadly speaking, wind energy is also solar energy, so it can also be said that a wind turbine is a heat energy generator that uses the sun as a heat source and the atmosphere as a working medium.

[0004] In the prior art, for example, a light environmentally friendly composite material and its preparation method are disclosed in Chinese Patent No. CN112226097A. The raw materials for preparing the light environmentally friendly composite material include, by weight, 100 parts of wood pulp, 1-3 parts of starch, 3-10 parts of cross-linking agent and 1-5 parts of foaming agent, and the mass fraction of the wood pulp is 10%-20%. The light environmentally friendly composite material of the present invention has a high foaming ratio, low material density, low elastic specific energy, small residual strain, excellent cushioning performance relative to ordinary pulp molding materials, and is environmentally friendly, and has good application prospects in the field of cushioning packaging.

[0005] However, in the prior art, the blades of traditional wind turbines mostly adopt a hollow structure, which has the advantages of large contact area, large volume but light weight. When the wind force is small, the blades can drive the generator to rotate and generate electricity. Although this structure has the advantage of being lightweight, its disadvantages are also very obvious. Due to the hollow structure, the structural strength of the fan blades will be greatly reduced. The traditional method is to weld support rods or support plates inside the hollow blades, or to use new materials to increase the structural strength. The above methods have the problems of fixed structure and easy rigid fracture. At the same time, the rigid support will damage the inside of the blade, and the new materials are expensive and the cost is too high. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention adopts the following technical solutions to solve the technical problems: a wind turbine blade, wherein a connecting pin is fixedly connected to the upper surface of the blade, a guide rod is arranged at the bottom of the connecting pin, a square box is fixedly connected to the outer surface of the guide rod, the guide rod is inserted into the interior of the blade, and the square box and the outer edge tube are inserted in sequence along the outer surface of the guide rod, and the cavity inside the blade is supported and filled under the joint action of the laminating device and the supporting device, the laminating device is arranged outside the square box, the outer edge tube is arranged on the top of the laminating device, the supporting device is arranged inside the outer edge tube, and a cross plate is fixedly connected to the inner surface of the square box;

[0007] The outer edge tube includes a rubber convex strip, the upper surface of the rubber convex strip is fixedly connected to the bottom plate, and the outer surface on the left side of the bottom plate is fixedly connected to the metal support plate. Since the square box and the outer edge tube both adopt a hollow structure, the weight of the blade itself can be effectively reduced while ensuring sufficient support effect, which is convenient for the subsequent rotation and power generation and subsequent maintenance of the blade. After the equipment is installed inside the blade, the blade is connected to the wind turbine through a connecting pin, and the outer surface on the right side of the metal support plate is fixedly connected to a concave plate, and a support tile is provided at the bottom of the concave plate. The outer surface on the right side of the support tile is fixedly connected to a heat insulation layer.

[0008] Preferably, the outer edge tube is located inside the blade, and the thermal insulation layer is fitted and fixed to the inner wall of the blade. The thermal insulation layer reduces the exposed fan blades from directly transferring external heat to the inner cavity of the blade, thereby reducing the influence of thermal expansion and contraction. Under the action of the bottom plate and the concave plate, the metal support plate, the support tile and the thermal insulation layer can be fixed together, and the outer surface of the outer edge tube abuts the inner surface of the blade. The supporting device is arranged vertically linearly along the inner surface of the outer edge tube, and the fitting device is arranged vertically linearly along the outer surface of the square box.

[0009] Preferably, the cross plates are arranged vertically and linearly along the inner surface of the square box. Since the supporting tiles adopt an "X"-shaped structure, the stability of the triangle can be utilized to increase the structural strength of the plate while reducing the dead weight of the plate. The supporting devices are arranged at a 90-degree offset from each other.

[0010] Preferably, the guide rod is located inside the blade, the composite plate adopts a modular design, and the plates are connected by rubber convex strips and concave plates. The bottom end of the guide rod is fixedly connected to the inner wall of the bottom of the blade.

[0011] Preferably, the supporting device includes a fixing ring, the inner surface of which is fixedly connected with a pin, the outer surface of which is fixedly connected with a sleeve, the outer surface of which is slidably connected with an adjusting rod, and the fixing ring is fixed to the outer surface of the guide rod by the pin. Since the supporting devices are arranged at ninety degrees to each other, the inner wall of the outer edge tube can be evenly supported, and the adjusting rod is controlled to move along the outer surface of the sleeve by adjusting the nut, thereby controlling the arc plate to press against the inner wall of the outer edge tube, and the outer surface of the adjusting rod is fixedly connected with the arc plate.

[0012] Preferably, the inner surface of the fixing ring contacts the outer surface of the guide rod, the outer surface of the pin is fixedly connected to the inner surface of the guide rod, the arc plate has a certain elastic deformation, and can resist without crushing the metal support plate due to the rigid connection, and the sleeve is symmetrically installed on the outer surface of the fixing ring.

[0013] Preferably, the arc plates are arranged linearly along the outer surface of the adjusting rod, the inner surface of the nut is threadedly connected to the outer surface of the sleeve, the multi-layer arc plates increase the supporting effect to prevent the blades from breaking or excessively deforming during rotation, the supporting device cooperates with the outer edge tube to jointly complete the filling support inside the blade, and the outer surface of the arc plate is in contact with the inner surface of the outer edge tube.

[0014] A method for preparing a wind turbine blade filled with a lightweight composite material comprises the following steps:

[0015] S1: Heat and soften the heat insulation layer, which is dozens of layers of aluminum-plated film, and apply rubber resin on the outer surface of the heat insulation layer. The thickness of the rubber resin is 1-1.5 mm. Then, apply adhesive on the upper surface of the rubber resin. The thickness of the adhesive is 1.2-1.5 mm. The component of the adhesive is dimethyl silicone oil.

[0016] S2: Before the adhesive is cured, fix the support tile to the outer surface of the insulation layer, then apply the adhesive to the other side of the support tile, and then glue the metal support plate;

[0017] S3: After the insulation layer, metal support plate and support tile are fixed, the bottom plate and concave plate are installed to further increase the stability, and then the rubber convex strip is fixed on the lower surface of the bottom plate;

[0018] S4: Put the cured composite board into the inner cavity of the blade, the outer surface of the heat insulation layer is in contact and extrusion with the inner wall of the blade 1, the composite boards are arranged in a ring along the inner wall of the blade, and stacked layer by layer, and each layer of composite boards is connected by rubber convex strips and concave plates.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The present invention sets a guide rod. When the device is in use, the guide rod is inserted into the interior of the blade, and the square box and the outer edge tube are inserted in sequence along the outer surface of the guide rod. Under the joint action of the fitting device and the supporting device, the cavity inside the blade is supported and filled. Since the square box and the outer edge tube both adopt hollow structures, the weight of the blade itself can be effectively reduced while ensuring sufficient supporting effect, which is convenient for the subsequent rotation of the blade for power generation and subsequent maintenance. After the device is installed inside the blade, the blade is connected to the wind turbine through a connecting pin, which solves the problem of poor internal structural strength of the traditional hollow wind turbine fan blade.

[0021] 2. The present invention arranges an outer edge tube. When the equipment is in use, the heat insulation layer is fitted and fixed to the inner wall of the blade. The heat insulation layer reduces the exposed fan blades from directly transferring external heat to the inner cavity of the blade, thereby reducing the influence of thermal expansion and contraction. Under the action of the bottom plate and the concave plate, the metal support plate, the support tile and the heat insulation layer can be fixed together. Since the support tile adopts an "X"-shaped structure, the structural strength of the plate can be increased by utilizing the stability of the triangle, while reducing the dead weight of the plate. The composite plate adopts a modular design, and the plates are connected by rubber convex strips and concave plates, which solves the problems of unstable internal structure and poor filling effect of traditional separated generator blades.

[0022] 3. The present invention provides a supporting device. When the device is in use, a fixing ring is fixed to the outer surface of the guide rod by a latch. Since the supporting devices are arranged at 90 degrees to each other, the inner wall of the outer edge tube can be evenly supported. The adjusting nut is used to control the adjustment rod to move along the outer surface of the sleeve, thereby controlling the arc plate to press against the inner wall of the outer edge tube. The arc plate has a certain elastic deformation amount, and can press against the metal support plate without crushing the metal support plate due to the rigid connection. The multi-layer arc plate increases the supporting effect and prevents the blades from breaking or excessively deforming during rotation. The supporting device cooperates with the outer edge tube to complete the filling support inside the blade, thereby solving the problem that the traditional hollow fan blades are supported by welding steel bars, and the fan blades are prone to brittle fracture due to the rigid connection.

[0023] 4. The present invention arranges a fitting device. When the device is in use, the cross plate is fixed inside the square box. By opening a through hole in the wall of the cross plate, a certain lightweight effect is achieved. A rubber plug is fixed on the outer surface of the square box. The rubber plug is convenient for the fitting device to slide inside the blade. At the same time, the rubber plug and the spring piece cooperate to achieve the effect of filling and supporting. The rubber plug is relatively soft in texture and will not scratch the inner wall when sliding inside the blade, thereby solving the problem that the inside of the traditional hollow fan blade is easily damaged when filling.

[0024] 5. Heat and soften the heat insulation layer 65, which is composed of dozens of layers of aluminum-plated films. Apply rubber resin on the outer surface of the heat insulation layer 65, and then apply adhesive on the upper surface of the rubber resin. The adhesive is composed of dimethyl silicone oil. Before the adhesive is cured, fix the support tile 64 on the outer surface of the heat insulation layer 65, and then apply adhesive on the other side of the support tile 64, and then stick the metal support plate 62. After the heat insulation layer 65, the metal support plate 62 and the support tile 64 are fixed, install the base plate 61. and concave plate 63 to further increase stability, and then fix the rubber convex strip 60 on the lower surface of the bottom plate 61; put the cured composite plate into the inner cavity of the blade 1, and the outer surface of the insulation layer 65 is in contact and extruded with the inner wall of the blade 1. The composite plates are arranged in a ring along the inner wall of the blade 1 and stacked layer by layer. Each layer of the composite plates is connected by the rubber convex strip 60 and the concave plate 63. Through multi-layer composite horizontal stacking and vertical clamping, the composite plates are fixed in a ring inside the blade, which reduces the weight while improving the structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of the wind turbine blade filled with a lightweight composite material and a preparation method thereof;

[0026] Figure 2 This is a schematic diagram of the structure of the wind turbine blade filled with a lightweight composite material and its preparation method A;

[0027] Figure 3 It is a schematic diagram of the structure inside the blade of the wind turbine fan blade filled with a lightweight composite material and a preparation method thereof;

[0028] Figure 4 It is a cross-sectional view of the outer edge tube and square box of the wind turbine blade filled with light composite material and the preparation method thereof;

[0029] Figure 5 It is a structural schematic diagram of the outer edge tube of the wind turbine blade filled with light composite material and its preparation method;

[0030] Figure 6 It is a schematic diagram of the structure inside the outer edge tube of the wind turbine blade filled with light composite material and its preparation method;

[0031] Figure 7 It is a top view of the outer edge tube of the wind turbine blade filled with light composite material and the preparation method thereof;

[0032] Figure 8 This is a schematic diagram of the structure of the wind turbine blade filled with lightweight composite material and the supporting equipment of the preparation method thereof;

[0033] Fig. 9 The present invention is a schematic structural diagram of a wind turbine blade filled with a lightweight composite material and a preparation method and bonding equipment.

[0034] In the figure: 1. blade; 2. connecting pin; 3. guide rod; 4. square box; 5. fitting device; 6. outer edge tube; 7. supporting device; 8. cross plate; 60. rubber convex strip; 61. bottom plate; 62. metal supporting plate; 63. concave plate; 64. supporting tile; 65. thermal insulation layer; 70. fixing ring; 71. latch; 72. sleeve; 73. adjusting rod; 74. nut; 75. arc plate; 80. through hole; 50. spring piece; 51. rubber plug. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses. Example 1

[0036] See also Figure 1 - Fig. 9 The present invention provides a technical solution: a wind turbine blade, wherein a connecting pin 2 is fixedly connected to the upper surface of the blade 1, a guide rod 3 is arranged at the bottom of the connecting pin 2, a square box 4 is fixedly connected to the outer surface of the guide rod 3, a fitting device 5 is arranged outside the square box 4, an outer edge tube 6 is arranged at the top of the fitting device 5, a supporting device 7 is arranged inside the outer edge tube 6, and a cross plate 8 is fixedly connected to the inner surface of the square box 4; the outer edge tube 6 comprises a rubber convex strip 60, a bottom plate 61 is fixedly connected to the upper surface of the rubber convex strip 60, a metal supporting plate 62 is fixedly connected to the outer surface on the left side of the bottom plate 61, a concave plate 63 is fixedly connected to the outer surface on the right side of the metal supporting plate 62, a supporting tile 64 is arranged at the bottom of the concave plate 63, and a heat insulating layer 65 is fixedly connected to the outer surface on the right side of the supporting tile 64. The outer edge tube 6 is located inside the blade 1, the outer surface of the outer edge tube 6 abuts against the inner surface of the blade 1, the supporting device 7 is vertically and linearly arranged along the inner surface of the outer edge tube 6, and the fitting device 5 is vertically and linearly arranged along the outer surface of the square box 4. The cross plates 8 are arranged vertically and linearly along the inner surface of the square box 4, and the supporting devices 7 are arranged at a 90-degree offset. The guide rod 3 is located inside the blade 1, and the bottom end of the guide rod 3 is fixedly connected to the inner wall of the bottom of the blade 1.

[0037] When in use, the guide rod 3 is inserted into the interior of the blade 1, and the square box 4 and the outer edge tube 6 are inserted in sequence along the outer surface of the guide rod 3. Under the joint action of the fitting device 5 and the supporting device 7, the cavity inside the blade 1 is supported and filled. Since the square box 4 and the outer edge tube 6 both adopt a hollow structure, while ensuring sufficient supporting effect, the weight of the blade 1 itself can be effectively reduced, which is convenient for the subsequent rotation power generation and subsequent maintenance of the blade 1. After the equipment is installed inside the blade 1, the blade 1 is connected to the wind turbine through the connecting pin 2.

[0038] The heat-insulating layer 65 is fitted and fixed to the inner wall of the blade 1. The heat-insulating layer 65 reduces the exposed fan blades from directly transferring external heat to the inner cavity of the blade 1, thereby reducing the influence of thermal expansion and contraction. Under the action of the bottom plate 61 and the concave plate 63, the metal support plate 62, the support tile 64 and the heat-insulating layer 65 can be fixed together. Since the support tile 64 adopts an "X"-shaped structure, the structural strength of the plate can be increased by utilizing the stability of the triangle, while reducing the dead weight of the plate. The composite plate adopts a modular design, and each plate is connected by a rubber convex strip 60 and a concave plate 63. Example 2

[0039] See also Figure 1 - Fig. 9 The present invention provides a technical solution: on the basis of the first embodiment, the supporting device 7 comprises a fixing ring 70, the inner surface of the fixing ring 70 is fixedly connected with a plug 71, the outer surface of the fixing ring 70 is fixedly connected with a sleeve 72, the outer surface of the sleeve 72 is slidably connected with an adjustment rod 73, and the outer surface of the adjustment rod 73 is fixedly connected with an arc plate 75. The inner surface of the fixing ring 70 contacts the outer surface of the guide rod 3, the outer surface of the plug 71 is fixedly connected with the inner surface of the guide rod 3, and the sleeve 72 is symmetrically mounted on the outer surface of the fixing ring 70. The arc plate 75 is linearly arranged along the outer surface of the adjustment rod 73, the inner surface of the nut 74 is threadedly connected with the outer surface of the sleeve 72, and the outer surface of the arc plate 75 contacts the inner surface of the outer edge tube 6.

[0040] When in use, the fixing ring 70 is fixed to the outer surface of the guide rod 3 by the pin 71. Since the supporting devices 7 are arranged at 90 degrees to each other, the inner wall of the outer edge tube 6 can be evenly supported. The adjusting rod 73 is controlled to move along the outer surface of the sleeve 72 by adjusting the nut 74, so as to control the arc plate 75 to press against the inner wall of the outer edge tube 6. The arc plate 75 has a certain elastic deformation amount, and can press against the metal support plate 62 without crushing the arc plate 75 due to the rigid connection. The multi-layer arc plate 75 increases the supporting effect and prevents the blade 1 from breaking or excessively deforming during rotation. The supporting device 7 cooperates with the outer edge tube 6 to complete the filling support inside the blade 1.

[0041] A method for preparing a wind turbine blade filled with a lightweight composite material comprises the following steps:

[0042] S1: Heat and soften the heat insulation layer 65, which is dozens of layers of aluminum-plated films, and apply rubber resin on the outer surface of the heat insulation layer 65, the thickness of the rubber resin is 1-1.5 mm, and then apply adhesive on the upper surface of the rubber resin, the thickness of the adhesive is 1.2-1.5 mm, and the component of the adhesive is dimethyl silicone oil;

[0043] S2: Before the adhesive is cured, the support tile 64 is fixedly bonded to the outer surface of the thermal insulation layer 65, and then the adhesive is applied to the other side of the support tile 64, and then the metal support plate 62 is bonded;

[0044] S3: After the heat insulation layer 65, the metal support plate 62 and the support tile 64 are fixed, the bottom plate 61 and the concave plate 63 are installed to further increase the stability, and then the rubber convex strip 60 is fixed on the lower surface of the bottom plate 61;

[0045] S4: The cured composite plate is placed into the inner cavity of the blade 1 , the outer surface of the heat insulating layer 65 is in contact and extruded with the inner wall of the blade 1 , the composite plates are arranged in a ring along the inner wall of the blade 1 , and are stacked layer by layer, and each layer of the composite plates is connected by the rubber convex strip 60 and the concave plate 63 .

[0046] When in use, the cross plate 8 is fixed inside the square box 4. By opening a through hole 80 in the wall of the cross plate 8, a certain lightweight effect is achieved. A rubber plug 51 is fixed to the outer surface of the square box 4. The rubber plug 51 facilitates the sliding of the fitting device 5 inside the blade 1. At the same time, the rubber plug 51 and the spring piece 50 cooperate to achieve the effect of filling and supporting. The rubber plug 51 is relatively soft in texture and will not scratch the inner wall when sliding inside the blade 1.

[0047] Working principle:

[0048] Heat and soften the heat insulation layer 65, which is composed of dozens of layers of aluminum-plated films. Rubber resin is applied on the outer surface of the heat insulation layer 65, and the thickness of the rubber resin is 1-1.5 mm. Then, adhesive is applied on the upper surface of the rubber resin, and the thickness of the adhesive is 1.2-1.5 mm. The adhesive is composed of dimethyl silicone oil. Before the adhesive is cured, the support tile 64 is fixed and bonded to the outer surface of the heat insulation layer 65, and then the adhesive is applied to the other side of the support tile 64, and then the metal support plate 62 is glued. After the heat insulation layer 65, the metal support plate 62 and the support tile 64 are fixed, the bottom plate 61 and the concave plate 63 are installed to further increase the stability, and then the rubber convex strip 60 is fixed on the lower surface of the bottom plate 61. The cured composite plate is placed in the inner cavity of the blade 1, and the outer surface of the heat insulation layer 65 is in contact and extrusion with the inner wall of the blade 1. The composite plates are arranged in a ring along the inner wall of the blade 1 and stacked layer by layer. Each layer of the composite plates is connected by the rubber convex strip 60 and the concave plate 63.

[0049] When the device is in use, the guide rod 3 is inserted into the interior of the blade 1, and the square box 4 and the outer edge tube 6 are inserted in sequence along the outer surface of the guide rod 3. Under the joint action of the fitting device 5 and the supporting device 7, the cavity inside the blade 1 is supported and filled. Since the square box 4 and the outer edge tube 6 both adopt a hollow structure, while ensuring sufficient supporting effect, the weight of the blade 1 itself can be effectively reduced, which is convenient for the subsequent rotation, power generation and subsequent maintenance of the blade 1. After the equipment is installed inside the blade 1, the blade 1 is connected to the wind turbine through the connecting pin 2, which solves the problem of poor internal structural strength of the traditional hollow wind turbine blades.

[0050] The heat-insulating layer 65 is fitted and fixed to the inner wall of the blade 1. The heat-insulating layer 65 reduces the exposed fan blades from directly transferring external heat to the inner cavity of the blade 1, thereby reducing the influence of thermal expansion and contraction. Under the action of the bottom plate 61 and the concave plate 63, the metal support plate 62, the support tile 64 and the heat-insulating layer 65 can be fixed together. Since the support tile 64 adopts an "X"-shaped structure, the structural strength of the plate can be increased by utilizing the stability of the triangle, while reducing the dead weight of the plate. The composite plate adopts a modular design, and each plate is connected by a rubber convex strip 60 and a concave plate 63, which solves the problem of unstable internal structure and poor filling effect of the traditional separated generator blades.

[0051] The fixing ring 70 is fixed to the outer surface of the guide rod 3 by the latch pin 71. Since the supporting devices 7 are arranged at 90 degrees to each other, the inner wall of the outer edge tube 6 can be evenly supported. The adjusting nut 74 is used to control the adjusting rod 73 to move along the outer surface of the sleeve 72, thereby controlling the arc plate 75 to press against the inner wall of the outer edge tube 6. The arc plate 75 has a certain elastic deformation amount, and can press against the metal support plate 62 without crushing the arc plate 75 due to the rigid connection. The multi-layer arc plate 75 increases the supporting effect and prevents the blade 1 from breaking or excessively deforming during rotation. The supporting device 7 cooperates with the outer edge tube 6 to complete the filling support inside the blade 1, which solves the problem that the traditional hollow fan blades are supported by steel bars welded inside, and the fan blades are prone to brittle fracture due to the rigid connection.

[0052] The cross plate 8 is fixed inside the square box 4. By opening a through hole 80 in the wall of the cross plate 8, a certain lightweight effect is achieved. A rubber plug 51 is fixed on the outer surface of the square box 4. The rubber plug 51 is convenient for the fitting device 5 to slide inside the blade 1. At the same time, the rubber plug 51 and the spring piece 50 cooperate to achieve the effect of filling and supporting. The rubber plug 51 is relatively soft in texture and will not scratch the inner wall when sliding inside the blade 1, thereby solving the problem that the inside of the traditional hollow fan blade is easily damaged when filling.

[0053] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A wind turbine blade, characterized in that: The upper surface of the blade (1) is fixedly connected to a connecting pin (2), the bottom of the connecting pin (2) is provided with a guide rod (3), the outer surface of the guide rod (3) is fixedly connected to a square box (4), the outside of the square box (4) is provided with a fitting device (5), the top of the fitting device (5) is provided with an outer edge tube (6), the interior of the outer edge tube (6) is provided with a supporting device (7), and the inner surface of the square box (4) is fixedly connected to a cross plate (8); the outer edge tube (6) comprises a rubber convex strip (60), the upper surface of the rubber convex strip (60) is fixedly connected to a bottom plate (61), the outer surface on the left side of the bottom plate (61) is fixedly connected to a metal supporting plate (62), the outer surface on the right side of the metal supporting plate (62) is fixedly connected to a concave plate (63), the bottom of the concave plate (63) is provided with a supporting tile (64), and the outer surface on the right side of the supporting tile (64) is fixedly connected to a heat insulating layer (65); The outer edge tube (6) is located inside the blade (1), the outer surface of the outer edge tube (6) abuts against the inner surface of the blade (1), the supporting device (7) is vertically linearly arranged along the inner surface of the outer edge tube (6), and the laminating device (5) is vertically linearly arranged along the outer surface of the square box (4); The guide rod (3) is located inside the blade (1), and the bottom end of the guide rod (3) is fixedly connected to the inner wall of the bottom of the blade (1); The supporting device (7) comprises a fixing ring (70), the inner surface of the fixing ring (70) is fixedly connected to a latch pin (71), the outer surface of the fixing ring (70) is fixedly connected to a sleeve (72), the outer surface of the sleeve (72) is slidably connected to an adjusting rod (73), a nut (74) controls the adjusting rod (73) to move along the outer surface of the sleeve (72), and the outer surface of the adjusting rod (73) is fixedly connected to an arc plate (75); The inner surface of the fixing ring (70) contacts the outer surface of the guide rod (3), the outer surface of the latch (71) is fixedly connected to the inner surface of the guide rod (3), and the sleeve (72) is symmetrically mounted on the outer surface of the fixing ring (70); The arc-shaped plates (75) are linearly arranged along the outer surface of the adjusting rod (73); the inner surface of the nut (74) is threadedly connected to the outer surface of the sleeve (72); and the outer surface of the arc-shaped plates (75) is in contact with the inner surface of the outer edge tube (6).

2. The wind turbine blade according to claim 1, characterized in that: The cross plates (8) are arranged vertically and linearly along the inner surface of the square box (4), and the supporting devices (7) are arranged at a 90-degree offset from each other.

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