Bolt fixing device for blade root of wind power blade

Abstract

The utility model discloses a wind power blade root bolt fixing device which comprises a blade root, the inner side of the blade root is in threaded connection with a plurality of screw rods, the screw rods are symmetrically arranged, the outer side of one end of each screw rod is in threaded connection with a blade fixing head, and the inner side of each blade fixing head is movably connected with an inner protection ring. When the wind power blade is installed, the inner protection ring is connected to the interior of the blade root in a sliding mode, the inner protection ring and the blade root are fixed through the second bolt, the blade root is effectively prevented from deforming, meanwhile, the structure of the blade root is effectively reinforced, then the screw rod is connected to the blade root in a threaded mode, and then the blade fixing head is connected to the screw rod. The handle is held by a hand to connect the outer protection rings to the blade root and the blade fixing head, the two outer protection rings are fixed through the second bolt, the outer portions of the blade root and the blade fixing head are effectively prevented from deforming, and meanwhile the joint between the blade root and the blade fixing head is effectively prevented from being collided and damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power, and in particular relates to a wind blade root bolt fixing device. Background Art

[0002] Wind turbine blades are the core components of wind turbines that convert natural wind energy into electricity for wind turbines. They are also the main basis for measuring the design and technical level of wind turbines. Wind turbine blades are a thin shell structure made of composite materials, generally composed of three parts: root, shell and reinforcing ribs or beams. Composite materials generally account for more than 90% of the weight of the entire wind turbine blade. At the beginning of the development of composite blades, cheap glass fiber reinforced unsaturated polyester resin system was used. As the length of blades continues to increase, carbon fiber, a reinforcing material with better performance, has entered the field of vision of blade manufacturers. The effect of adding carbon fiber on composite blades is discussed. It is generally believed that glass fiber is used for blades below 22m, while carbon fiber or carbon-glass hybrid fiber is used for blades greater than 42m. In terms of resin matrix, polyester resin is low in price and has good molding processability, but its performance is average. Epoxy resin is just the opposite. It has better performance but higher price and poor process operability. Therefore, vinyl resin, which is between the two in cost and performance, is currently widely used by some blade manufacturers.

[0003] Some existing wind blade root bolt fixing devices do not have a structure to reinforce and protect the blade root, which may cause the blade root to deform during installation of the wind blade, thereby preventing normal installation and causing the blade to be scrapped. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a wind blade root bolt fixing device to solve the problem that some existing wind blade root bolt fixing devices proposed in the above background technology do not have a structure to reinforce and protect the blade root, which may cause the blade root to deform when the wind blade is installed, thereby preventing normal installation and causing the blade to be scrapped.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wind blade root bolt fixing device, including a blade root, a screw rod is threadedly connected to the inner side of the blade root, and a plurality of screw rods are symmetrically arranged, and a blade fixing head is threadedly connected to the outer side of one end of the screw rod, and an inner protective ring is movably connected to the inner side of the blade fixing head, and a first bolt is threadedly connected to the inner side of the inner protective ring, and a plurality of first bolts are symmetrically arranged, and a first nut is threadedly connected to the outer side of one end of the first bolt, and an outer protective ring is slidably connected to the outer side of the blade root, and two outer protective rings are symmetrically arranged, and a second bolt is threadedly connected to the inner side of the outer protective ring, and a plurality of second bolts are symmetrically arranged, and a second nut is threadedly connected to the outer side of one end of the second bolt.

[0006] Preferably, a protection pad is fixedly connected to one side of the outer protective ring, two protection pads are symmetrically arranged, and one side of each protection pad is slidably connected to a blade root.

[0007] Preferably, a second gasket is movably connected to the outer side of the second bolt, a plurality of second gaskets are symmetrically arranged, and one side of each second gasket is movably connected to an outer protective ring.

[0008] Preferably, a handle is fixedly connected to the other side of the outer protective ring, and a plurality of the handles are symmetrically arranged, and the handle is located on one side of the second bolt.

[0009] Preferably, a first gasket is movably connected to the outer side of one end of the first bolt, a plurality of first gaskets are symmetrically arranged, and one side of each of the first gaskets is movably connected to a blade root.

[0010] Preferably, the outer side of the other end of the first bolt is movably connected to an anti-skid pad, and one side of the anti-skid pad is movably connected to an inner protective ring.

[0011] Preferably, an anti-oxidation coating is provided on the outer sides of the first bolt and the second bolt.

[0012] Compared with the prior art, the utility model provides a wind blade root bolt fixing device, which has the following beneficial effects:

[0013] 1. The utility model provides an inner protective ring and an outer protective ring, wherein the outer side of the inner protective ring is movably connected with a blade root and a blade fixing head respectively, the inner side of the inner protective ring is threadedly connected with a first bolt, the outer side of one end of the first bolt is threadedly connected with a first nut, the blade root and the outer side of the blade fixing head are both movably connected with the outer protective ring, the inner side of the outer protective ring is threadedly connected with a second bolt, and the outer side of one end of the second bolt is threadedly connected with a second nut. When installing the wind blade, the inner protective ring is first slidably connected to the inside of the blade root, and the inner protective ring and the blade root are fixed by the first bolt, so as to effectively prevent the blade root from being deformed and also effectively strengthen the structure of the blade root, and then the screw is threadedly connected to the blade root, and then the blade fixing head is connected to the screw, and then the outer protective ring is connected to the blade root and the blade fixing head, and the two outer protective rings are fixed by the second bolt, so as to effectively prevent the blade root and the outer side of the blade fixing head from being deformed and also effectively protect the connection between the blade root and the blade fixing head from being damaged by collision;

[0014] 2. The utility model provides a protective pad, one side of which is movably connected to the blade root, and the other side of which is fixedly connected to the outer protective ring, which effectively prevents the outer surface of the blade root from being worn when the outer protective ring is installed;

[0015] 3. The utility model provides a second gasket, one side of the second gasket is movably connected with an outer protective ring, and the inner side of the second gasket is movably connected with a second bolt, which effectively increases the stability of the second bolt and prevents the second bolt from loosening.

[0016] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model has a scientific and reasonable structure, is safe and convenient to use, and provides great help to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the axonometric structure of a wind blade root bolt fixing device proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the exploded structure of a wind blade root bolt fixing device proposed by the utility model;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 4 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0022] Figure 5 for Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0023] Figure 6 This is a schematic diagram of the top view of a wind blade root bolt fixing device proposed by the utility model;

[0024] Figure 7 This is a side structural schematic diagram of a wind blade root bolt fixing device proposed by the utility model;

[0025] In the figure: blade root 1, screw rod 2, blade fixing head 3, inner protective ring 4, first bolt 5, first nut 6, outer protective ring 7, first gasket 8, second bolt 9, second nut 10, second gasket 11, handle 12, protection pad 13, anti-slip pad 14. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-7 The utility model provides a technical solution: a wind blade root bolt fixing device, including a blade root 1, a screw rod 2 is threadedly connected to the inner side of the blade root 1, and a plurality of screw rods 2 are symmetrically arranged. A blade fixing head 3 is threadedly connected to the outer side of one end of the screw rod 2, an inner protective ring 4 is movably connected to the inner side of the blade fixing head 3, a first bolt 5 is threadedly connected to the inner side of the inner protective ring 4, and a plurality of first bolts 5 are symmetrically arranged. A first nut 6 is threadedly connected to the outer side of one end of the first bolt 5, an outer protective ring 7 is slidably connected to the outer side of the blade root 1, and two outer protective rings 7 are symmetrically arranged. A second bolt 9 is threadedly connected to the inner side of the outer protective ring 7, and a plurality of second bolts 9 are symmetrically arranged. One end of the second bolt 9 The outer side of each is threadedly connected with a second nut 10. When installing the wind blade, the inner protective ring 4 is first slidably connected to the inside of the blade root 1, and the inner protective ring 4 and the blade root 1 are fixed by the first bolt 5, which effectively prevents the blade root 1 from being deformed, and also effectively strengthens the structure of the blade root 1. Then the screw 2 is threadedly connected to the blade root 1, and then the blade fixing head 3 is connected to the screw 2, and then the outer protective ring 7 is connected to the blade root 1 and the blade fixing head 3, and the two outer protective rings 7 are fixed by the second bolt 9, which effectively prevents the blade root 1 and the blade fixing head 3 from being deformed on the outside, and also effectively protects the connection between the blade root 1 and the blade fixing head 3 from being damaged by collision.

[0028] In the utility model, preferably, a protective pad 13 is fixedly connected to one side of the outer protective ring 7, two protective pads 13 are symmetrically arranged, and one side of the protective pads 13 is slidably connected to the blade root 1, which effectively prevents the outer surface of the blade root 1 from being worn when the outer protective ring 7 is installed.

[0029] In the utility model, preferably, a second gasket 11 is movably connected to the outer side of the second bolt 9, and a plurality of second gaskets 11 are symmetrically arranged. One side of the second gasket 11 is movably connected to an outer protective ring 7, which effectively increases the stability of the second bolt 9 and prevents the second bolt 9 from loosening.

[0030] In the utility model, preferably, a handle 12 is fixedly connected to the other side of the outer protective ring 7, and a plurality of handles 12 are symmetrically arranged. The handle 12 is located on one side of the second bolt 9, which effectively facilitates the construction personnel to hold the handle 12 and install the outer protective ring 7 to the blade root 1 and the blade fixing head 3.

[0031] In the utility model, preferably, the outer side of one end of the first bolt 5 is movably connected with a first gasket 8, and a plurality of first gaskets 8 are symmetrically arranged, and one side of the first gasket 8 is movably connected with a blade root 1, which effectively increases the stability of the first bolt 5 and prevents it from loosening.

[0032] In the utility model, preferably, the outer side of the other end of the first bolt 5 is movably connected with an anti-skid pad 14, and one side of the anti-skid pad 14 is movably connected with an inner protective ring 4, which effectively prevents the first bolt 5 from wearing the surface of the inner protective ring 4 when fixing the inner protective ring 4.

[0033] In the present invention, preferably, an anti-oxidation coating is provided on the outer sides of the first bolt 5 and the second bolt 9, which effectively increases the anti-oxidation ability of the first bolt 5 and the second bolt 9 and prevents them from oxidizing and rusting.

[0034] The working principle and use process of the utility model are as follows: when using, when installing the wind blade, first slide the inner protective ring 4 to connect it to the inside of the blade root 1, and fix the inner protective ring 4 and the blade root 1 by the first bolt 5, effectively preventing the blade root 1 from being deformed, and also effectively reinforcing the structure of the blade root 1, and then thread the screw 2 to the blade root 1, and then connect the blade fixing head 3 to the screw 2, hold the handle 12 to connect the outer protective ring 7 to the blade root 1 and the blade fixing head 3, and fix the two outer protective rings 7 by the second bolt 9, effectively preventing the blade root 1 and the blade fixing head 3 from being deformed on the outside, and also effectively protecting the connection between the blade root 1 and the blade fixing head 3 from being damaged by collision.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind blade root bolt fixing device, comprising a blade root (1), characterized in that: The inner side of the blade root (1) is threadedly connected with a screw rod (2), and a plurality of the screw rods (2) are symmetrically arranged. The outer side of one end of the screw rod (2) is threadedly connected with a blade fixing head (3), and the inner side of the blade fixing head (3) is movably connected with an inner protective ring (4). The inner side of the inner protective ring (4) is threadedly connected with a first bolt (5), and a plurality of the first bolts (5) are symmetrically arranged. The outer side of one end of the first bolt (5) is threadedly connected with a first nut (6). The outer side of the blade root (1) is slidably connected with an outer protective ring (7), and two of the outer protective rings (7) are symmetrically arranged. The inner side of the outer protective ring (7) is threadedly connected with a second bolt (9), and a plurality of the second bolts (9) are symmetrically arranged. The outer side of one end of the second bolt (9) is threadedly connected with a second nut (10).

2. A wind blade root bolt fixing device according to claim 1, characterized in that: A protection pad (13) is fixedly connected to one side of the outer protective ring (7), two protection pads (13) are symmetrically arranged, and one side of each protection pad (13) is slidably connected to a blade root (1).

3. A wind blade root bolt fixing device according to claim 2, characterized in that: A second gasket (11) is movably connected to the outer side of the second bolt (9), a plurality of second gaskets (11) are symmetrically arranged, and one side of each second gasket (11) is movably connected to an outer protective ring (7).

4. A wind blade root bolt fixing device according to claim 3, characterized in that: A handle (12) is fixedly connected to the other side of the outer protective ring (7), and a plurality of the handles (12) are symmetrically arranged. The handle (12) is located on one side of the second bolt (9).

5. A wind blade root bolt fixing device according to claim 4, characterized in that: A first gasket (8) is movably connected to the outer side of one end of the first bolt (5), a plurality of first gaskets (8) are symmetrically arranged, and one side of each of the first gaskets (8) is movably connected to a blade root (1).

6. A wind blade root bolt fixing device according to claim 5, characterized in that: The outer side of the other end of the first bolt (5) is movably connected to an anti-skid pad (14), and one side of the anti-skid pad (14) is movably connected to an inner protective ring (4).

7. A wind blade root bolt fixing device according to claim 6, characterized in that: The outer sides of the first bolt (5) and the second bolt (9) are both provided with an anti-oxidation coating.

Images