T-shaped bolt fastening structure at root of wind power blade

Abstract

The utility model relates to the technical field of bolts, and discloses a wind power blade root T-shaped bolt fastening structure, which comprises a rotating pipe, a nut main body and a bolt main body, the lower side of the bolt main body is connected with a hexagonal block, the upper side of the rotating pipe is provided with an insertion hole matched with the hexagonal block, the lower side of the nut main body is provided with an auxiliary device, and the auxiliary device is connected with the nut main body. Inserting holes matched with the auxiliary device are formed in the lower side of the nut body and the lower side of the rotating pipe correspondingly, the auxiliary device comprises a screw plate, a tension spring is connected to the lower side of the screw plate, a connecting plate is connected to the lower side of the tension spring, and multiple sets of inserting rods are connected to the upper side of the connecting plate; according to the scheme, the auxiliary device can be matched with the rotating pipe to connect the nut body and the inserted link bolt body, the possibility that the nut body and the bolt body are loosened is reduced, and the installation stability of the wind power blade is improved.

Description

Technical Field

[0001] This utility model belongs to the field of bolt technology, specifically a T-bolt fastening structure for the root of a wind turbine blade. Background Technology

[0002] Currently, the root bolts of wind turbine blades are mainly installed using T-bolt connections. Multiple axial and radial holes are drilled evenly at the root of the wind turbine blade. The axial holes connect to the multiple radial holes, forming a "T"-shaped hole structure. Double-ended bolts are installed in the corresponding axial holes, and cylindrical nuts are installed in the corresponding radial holes. The cylindrical nuts are connected to the double-ended bolts. However, during long-term use, one nut is prone to loosening due to wind impact on the blade, which increases the impact force on nuts in other positions, thus increasing the risk of overall blade loosening. To address this, we propose a T-bolt fastening structure for the root of wind turbine blades. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a T-bolt fastening structure for the root of wind turbine blades, which effectively solves the above problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a T-bolt fastening structure for the root of a wind turbine blade, comprising a rotating tube, a nut body, and a bolt body. A hexagonal block is connected to the lower side of the bolt body. An insertion hole matching the hexagonal block is opened on the upper side of the rotating tube. An auxiliary device is provided on the lower side of the nut body. An insertion hole matching the auxiliary device is opened on the lower sides of both the nut body and the rotating tube.

[0005] Preferably, the auxiliary device includes a screw plate, a tension spring is connected to the lower side of the screw plate, a connecting plate is connected to the lower side of the tension spring, and a plurality of insert rods are connected to the upper side of the connecting plate. The upper side of the insert rods passes through the screw plate and extends to the lower side of the rotating tube.

[0006] Preferably, a threaded tube is connected to the lower side of the nut body, and the auxiliary device is located on the outside of the threaded tube.

[0007] Preferably, a limiting tube is connected to the lower side of the screw plate, and the tension spring and connecting plate are located inside the limiting tube.

[0008] Preferably, rubber pads are connected to both the upper and lower sides of the rotating tube.

[0009] Preferably, two sets of fixed tubes are provided on the outer side of the rotating tube.

[0010] Preferably, an auxiliary bolt is provided on the lower side of the auxiliary device.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By setting up auxiliary devices, the nut body and the plug bolt body can be connected with the swivel tube, reducing the possibility of loosening between the nut body and the bolt body, improving the stability of wind turbine blade installation. By setting up rubber pads, space is left for the wind turbine blades and impeller to expand and contract, improving the practicality of this device.

[0013] 2. The use of a screw tube facilitates the quick installation and disassembly of the auxiliary device. At the same time, by installing the auxiliary device on the lower side of the bolt body, the stability of the auxiliary device can be effectively improved. The auxiliary bolt is used to limit the movement of the auxiliary device, thereby improving its stability. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the T-bolt fastening structure at the root of the wind turbine blade of this utility model;

[0017] Figure 2 This is a schematic diagram of the fixed tube structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the rubber pad structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the auxiliary device structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the auxiliary device structure of this utility model.

[0021] In the diagram: 100, rotating tube; 110, fixing tube; 120, rubber pad; 200, nut body; 210, threaded tube; 300, bolt body; 310, hexagonal block; 400, auxiliary device; 410, threaded plate; 420, tension spring; 430, connecting plate; 440, insertion rod; 450, limiting tube; 500, auxiliary bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 A T-bolt fastening structure for the root of a wind turbine blade includes a rotating tube 100, a nut body 200, and a bolt body 300. Two sets of fixing tubes 110 are provided on the outer side of the rotating tube 100. The fixing tubes 110 are pre-embedded in the wind turbine blade and impeller. The fixing tubes 110 improve the placement stability and ease of use of the rotating tube 100. A hexagonal block 310 is fixedly connected to the lower side of the bolt body 300. An insertion hole matching the hexagonal block 310 is opened on the upper side of the rotating tube 100. The lower side of the nut body 200... An auxiliary device 400 is provided. Both the nut body 200 and the rotating tube 100 have matching insertion holes on their lower sides. During use, the bolt body 300 is inserted into the rotating tube 100, with the hexagonal block 310 positioned on the upper side of the rotating tube 100. The nut body 200 and bolt body 300 are connected. Then, the auxiliary device 400 is inserted into the lower sides of the nut body 200 and rotating tube 100. This causes the nut body 200 to loosen and rotate under pressure, driving the rotating tube 100 to apply pressure to the bolt body 300. The pressure causes the bolt body 300 and the nut body 200 to rotate synchronously, thus preventing the nut body 200 from loosening. It is worth mentioning that this device requires timely maintenance and replacement during long-term use. By setting up the rotating tube 100 in conjunction with the auxiliary device 400 to connect the nut body 200 and the bolt body 300, the possibility of loosening between the nut body 200 and the bolt body 300 is reduced, improving the stability of wind turbine blade installation. A threaded tube 210 is fixedly connected to the lower side of the nut body 200. The auxiliary device 400 is located on the outside of the threaded tube 210, and the screw plate 410 is screwed to the outside of the threaded tube 210. The threaded tube 210 facilitates the quick installation and disassembly of the auxiliary device 400. At the same time, by installing the auxiliary device 400 on the lower side of the bolt body 300, the stability of the auxiliary device 400 in use can be effectively improved. Rubber pads 120 are fixedly connected to both the upper and lower sides of the rotating tube 100. The rubber pads 120 provide space for the wind turbine blades and impeller to expand and contract, providing practicality for the use of this device.

[0024] The auxiliary device 400 includes a screw plate 410. A tension spring 420 is fixedly connected to the lower side of the screw plate 410. A connecting plate 430 is fixedly connected to the lower side of the tension spring 420. Multiple sets of insert rods 440 are fixedly connected to the upper side of the connecting plate 430. The upper side of the insert rods 440 penetrates the screw plate 410 and extends to the lower side of the rotating tube 100. During use, the connecting plate 430 is used to drive the insert rods 440 into the rotating tube 100 and the nut body 200. During installation, the connecting plate 430 is first pulled to move it downwards, causing the insert rods 440 to disengage from the rotating tube 100 and the nut body 200 until the rotating tube 100, the nut body 200, and the bolt body 300 are fixed before the auxiliary device 400 is installed. Assembly: The screw plate 410 is fixed to the outside of the screw plate 410. The tension spring 420 is used to drive the connecting plate 430 and the insertion rod 440 into the interior of the rotating tube 100 and the nut body 200. By setting the auxiliary device 400, it can cooperate with the rotating tube 100 to connect the nut body 200 and the bolt body 300 of the insertion rod 440, reducing the possibility of loosening between the nut body 200 and the bolt body 300 and improving the stability of wind turbine blade installation. The lower side of the screw plate 410 is fixedly connected to the limiting tube 450. The tension spring 420 and the connecting plate 430 are located inside the limiting tube 450. By setting the limiting tube 450, the tension spring 420 and the connecting plate 430 are limited, thereby improving the stability of the device. The lower side of the auxiliary device 400 is provided with an auxiliary bolt 500, which is screwed to the lower side of the bolt body 300. By setting the auxiliary bolt 500, the auxiliary device 400 is limited, thereby improving the stability of the auxiliary device 400.

Claims

1. A wind turbine blade root T-bolt fastening structure, characterized by: The utility model relates to a nut body (200) and bolt body (300) are connected with hexagonal block (310) including the pipe (100), the upper side of pipe (100) is equipped with the insertion hole that matches with hexagonal block (310), the lower side of nut body (200) is equipped with auxiliary device (400), the lower side of nut body (200) and pipe (100) are equipped with the insertion hole that matches with auxiliary device (400).

2. The wind power blade root T-bolt fastening structure according to claim 1, characterized in that: The auxiliary device (400) includes screw plate (410), the lower side of screw plate (410) is connected with pull spring (420), the lower side of pull spring (420) is connected with connecting plate (430), the upper side of connecting plate (430) is connected with multiple groups of insertion rod (440), the upper side of insertion rod (440) penetrates screw plate (410) and extends to the lower side of pipe (100).

3. The wind power blade root T-bolt fastening structure according to claim 1, characterized in that: The lower side of nut body (200) is connected with screw pipe (210), and the auxiliary device (400) is located outside the screw pipe (210).

4. The wind power blade root T-bolt fastening structure of claim 2, wherein: The lower side of screw plate (410) is connected with limiting tube (450), and the pull spring (420) and the connecting plate (430) are located inside the limiting tube (450).

5. The wind power blade root T-bolt fastening structure of claim 1, wherein: The upper and lower sides of the pipe (100) are connected with rubber pads (120).

6. The wind power blade root T-bolt fastening structure of claim 1, wherein: The outer side of the pipe (100) is provided with two groups of fixed pipes (110).

7. The wind power blade root T-bolt fastening structure of claim 1, wherein: The lower side of the auxiliary device (400) is provided with an auxiliary bolt (500).

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