CN205277719U - Special lightning rod device of wind generating set cabin cover - Google Patents

Abstract

The utility model discloses a special lightning rod device of wind generating set cabin cover. The technical scheme who adopts includes the frame and installs the lightning rod on the frame, its characterized in that: the frame includes vertical pole, leger and rotates the flexible pull rod of being connected with the leger, the lightning rod is all installed at the leger both ends. Through two lightning rod device design, increase cabin cover lightning strike protection point, cabin cover thunderbolt security has improved, avoid the inside electrical component's of cabin cover interference, also improved the stability of communication simultaneously. In addition, this lightning rod device is installed, the maintenance is also easier.

Description

A special lightning rod device for wind turbine nacelle cover

technical field

The utility model relates to a special lightning rod device for the nacelle cover of a wind power generating set.

Background technique

Wind energy is the renewable clean energy with the most mature technology and the most conditions for large-scale development. Wind power generation provides the basis for the harmonious development of man and nature. Since wind power generators work in a natural environment, they will inevitably be affected by natural disasters. Due to the rapid development of modern science and technology, the capacity of a single wind turbine is increasing. In order to absorb more energy, the height of the tower and the diameter of the impeller increase, which also increases the risk of being struck by lightning. Lightning has become a natural phenomenon. It is the most harmful disaster to the safe operation of wind turbines. The huge energy released by lightning can cause damage to wind turbine blades, generator insulation breakdown, and burnout of control components.

The terrain in my country's coastal areas is complex, and there are many thunderstorm days. Full attention should be paid to the huge threat brought by lightning strikes to wind turbines and operators. In order to reduce the losses caused by natural disasters, it is necessary to fully understand it and make targeted preventive measures. The lightning protection of wind turbine is a comprehensive lightning protection project. Whether the lightning protection design is in place is directly related to whether the wind turbine can work normally in thunderstorm weather, and to ensure that various equipment in the wind turbine are not damaged.

Another problem is the grounding of wind turbines located on hills and ridges. The soil conductivity in these areas is relatively poor. Typically, the nacelles of modern large wind turbines are made of composite materials, such as glass-fibre-reinforced plastic or wood laminates. When lightning strikes unprotected blades made of such materials, damage always occurs due to the inability of these materials to conduct the lightning current. Therefore, requirements for such lightning protection are important. The wind turbine nacelle cover is made of glass fiber reinforced plastics, and they should prevent direct lightning strikes. Wind turbines are currently the most widely used and most important equipment for wind energy utilization.

The design of the lightning protection system of the wind turbine nacelle cover is directly related to the internal electrical circuit of the nacelle cover. The nacelle cover is equivalent to the protective shell of the wind power system. Therefore, whether the design of the lightning protection system of the nacelle cover is reasonable or not is directly related to the work of the wind turbine. status and device security. Since the nacelle cover is subjected to direct lightning strikes, it cannot be verified through experiments. It is necessary to consider the magnitude and direction of the lightning current at the beginning of the design. Therefore, the rationality of the design of the nacelle cover lightning protection system is particularly important. The design of the traditional nacelle cover lightning protection system is to install a lightning rod on the top of the nacelle cover, and combine the lead wires under the nacelle cover and run through the cover body to guide the lightning current. Issues with protective nacelle covers.

Utility model content

The technical problem to be solved by the utility model is to provide a special lightning rod device capable of multi-directional protection for the nacelle cover of the wind power generating set.

In order to solve the above-mentioned problems, the technical solution adopted by the utility model includes a frame and a lightning rod installed on the frame. Lightning rods are installed at both ends of the rod.

The special lightning rod device is characterized in that: the upper end of the lightning rod is fixedly connected to the support rod welded on the large horizontal rod.

The special lightning rod device is characterized in that: a small horizontal bar is arranged above the lightning rod, and an anemometer and a wind direction indicator are respectively installed at both ends of the small horizontal bar.

The special lightning rod device is characterized in that the extensions at both ends of the large horizontal bar are respectively equipped with aviation obstruction lights.

The special lightning rod device is characterized in that: the bottom of the longitudinal rod is connected with a large lug bolt, and the large lug bolt is connected with the backing plate through a bolt.

The special lightning rod device is characterized in that: the lightning rod is sleeved on the sleeve and fixed by a fixing device, and the sleeve is fixed on the large horizontal bar and/or the support bar.

The special lightning rod device is characterized in that: the fixing device is a stainless steel pin and a cotter pin arranged on the bushing.

The special lightning rod device is characterized in that a grounding wire is connected between the large lug bolt and the longitudinal rod.

Compared with the prior art, the above-mentioned technical solution of the utility model has the following advantages:

Through the design of the double lightning rod device, the lightning strike protection point of the nacelle cover is increased, the lightning strike safety of the nacelle cover is improved, the interference of the electrical components inside the nacelle cover is avoided, and the stability of communication is also improved. In addition, the installation and maintenance of the lightning rod device are also easier.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings of the description.

Fig. 1, 2 are the structural representations of different angles of the utility model lightning rod device;

3 and 4 are partial enlarged views of FIG. 1 .

detailed description

Referring to FIGS. 1 to 4 , the special lightning rod device for the wind turbine nacelle cover of the present invention includes a frame 1 and a lightning rod 2 installed on the frame 1 . The frame 1 includes a vertical bar 3 , a large horizontal bar 4 and a telescopic pull rod 5 rotatably connected to the large horizontal bar 4 , and lightning rods 6 are installed at both ends of the large horizontal bar 4 .

To further optimize the above scheme, the upper end of the lightning rod 6 is fixedly connected to the support rod 7 welded on the large horizontal bar 4, and the lightning rod 6 is installed more firmly through the support rod 14 to prevent it from being blown down by strong winds. A small horizontal bar 8 is arranged above the lightning rod 6, and an anemometer 9 and an anemometer 10 are respectively installed at both ends of the small horizontal bar 8. Aviation obstruction lights 12 are installed on the extensions 11 at both ends of the large cross bar 4 . The advantage of installing 2 anemometers 16 and 17 at the same time is that even if one of them breaks down, the other can continue to use without affecting the measurement. The bottom of the longitudinal bar 3 is connected with a large lug bolt 13, and the large lug bolt 13 is connected with the backing plate 14 through bolts. It replaces the traditional welding method for installation, making installation and replacement more convenient. The lightning rod 6 is sleeved on the sleeve 15 and fixed by a fixing device, and the sleeve 15 is fixed on the large horizontal bar 4 and the support bar 7 . The fixing device is a stainless steel pin 16 and a cotter pin 17 arranged on the casing 15 . When the lightning rod 6, the anemometer 16 or the wind direction meter 17 break down, it is not necessary to disassemble the whole device, but only the fixing device is removed, and the lightning rod is slid down to replace related equipment, which greatly improves the convenience of maintenance. A ground wire 18 is connected between the large lug bolt 13 and the longitudinal bar 3 to enhance the electrical conductivity between the large lug bolt 13 and the longitudinal bar 3 .

The above is not to limit the utility model in any form. Although the utility model has been disclosed as above with a preferred implementation case, it is not used to limit the utility model. Within the scope of the scheme, when the structure and technical content disclosed above can be used to make some changes or modifications to equivalent implementation cases with equivalent changes, but any content that does not deviate from the technical scheme of the present utility model shall be based on the technical essence of the present utility model Any simple modifications, equivalent changes and modifications made to the above implementation cases are still within the scope of the technical solution of the utility model.

Claims (8)

1. an engine room cover of wind turbine Special lightning-protection needle device, the lightning rod (2) comprising framework (1) and be arranged on framework (1), it is characterized in that: the flexible pull bar (5) that described framework (1) comprises vertical bar (3), big cross bar (4) and is rotationally connected with big cross bar (4), lightning rod (6) is all installed at described big cross bar (4) two ends.

2. Special lightning-protection needle device according to claim 1, it is characterised in that: described lightning rod (6) upper end is fixedly connected with the handrail (7) being welded on big cross bar (4).

3. Special lightning-protection needle device according to claim 1, it is characterised in that: described lightning rod (6) top is provided with little cross bar (8), and described little cross bar (8) two ends install anemoscope (9), wind indicator (10) respectively.

4. Special lightning-protection needle device according to claim 1, it is characterised in that: aviation obstacle lamp (12) is installed in the extension portion (11) at described big cross bar (4) two ends respectively.

5. Special lightning-protection needle device according to claim 1, it is characterised in that: described vertical bar (3) bottom connects big ear stud (13), and described big ear stud (13) is connected with backing plate (14) by bolt.

6. Special lightning-protection needle device according to claim 1 and 2, it is characterised in that: described lightning rod (6) is set in sleeve pipe (15) and above and is fixed by stationary installation, and described sleeve pipe (15) is fixed on big cross bar (4) and/or handrail (7).

7. Special lightning-protection needle device according to claim 6, it is characterised in that: described stationary installation is the pin (16) that is located on sleeve pipe (15) and split pin (17).

8. Special lightning-protection needle device according to claim 5, it is characterised in that: it is connected grounding wire (18) between described big ear stud (13) and vertical bar (3).