Device for detecting conduction of lightning protection wire of wind turbine generator blade

Abstract

The utility model relates to the field of operation and maintenance of wind generating sets, in particular to a device for detecting the conduction of a lightning protection wire of a blade of a wind generating set, which comprises a metal fixing ring, a hoisting cable fixing lifting lug and a metal woven net bag, a cable testing binding post is arranged on the hoisting cable fixing lifting lug, and a metal belt is arranged in the metal woven net bag. The metal belt is provided with a needle type contactor, and the needle type contactor is used for scratching or penetrating an oxide layer of the blade lightning arrester. The device for detecting the conduction of the lightning protection wire of the blade of the wind turbine generator can enable the conduction test of the blade to be more convenient, safer, time-saving and labor-saving, greatly shortens the construction time, improves the working efficiency of personnel, and reduces the safety of the personnel at the same time.

Description

Technical Field

[0001] The utility model relates to the field of wind turbine generator set operation and maintenance, in particular to a device for detecting the conduction of a lightning protection line of a blade of a wind turbine generator set. Background Art

[0002] Wind turbines are usually located at the highest point in their environment, which makes them vulnerable to lightning strikes. In order to reduce damage from lightning strikes, wind turbines are equipped with lightning protection nets. The blades are the key parts of the unit. During transportation, the blade tip is the highest point of the unit, so lightning arresters are installed. At the same time, there are pre-buried lightning protection wires inside the blades. When the unit is struck by induced lightning or light direct lightning, the wires inside the blades can conduct the current to the lightning protection net of the unit, thereby conducting the current into the ground to protect the unit. The conduction between the lightning protection wires and the lightning arresters of the blades is crucial to the safety of the unit.

[0003] Because the wires are embedded in the blades, as the unit runs for a long time, various forces on the blades will cause damage or breakage of the embedded wires, making the blade lightning protection ineffective. The traditional wind turbine blade embedded wire conduction test is mainly measured by a small flying man, that is, a hanging basket is lowered from the top of the cabin in an artificial form, and the wire is manually used to contact the lightning arrester to form a measurement circuit, and the resistance and conductivity are measured using relevant instruments. This method has the problems of high personnel safety risks and long measurement time cycle. When measuring, the personnel need to stand or sit in the hanging basket, which is suspended from the cabin by cables. Once the wind blows, the hanging basket will swing, seriously affecting the safety of the personnel. When conducting the conduction measurement, the hanging basket needs to be lowered from the cabin, the operator sits in the hanging basket, and the auxiliary personnel operate the hanging basket up and down by controlling the crane in the cabin. It takes a long time to operate the operating parts. At the same time, after measuring one blade, the hanging basket needs to be retracted, the second blade needs to be rotated to the corresponding position, and then the hanging basket needs to be lowered. This is repeated three times, which is time-consuming and labor-intensive.

[0004] To solve the above problems, the industry has proposed some detection devices that can improve the safety of detection, such as the Chinese utility model patent with application number CN202223325342.X, entitled A detection device for lightning protection conductivity of offshore wind turbines. However, the current detection device is still a bit cumbersome and inconvenient in operation, which is not conducive to improving the efficiency of detection operations. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an efficient and safe device for detecting the conduction of lightning protection wires of blades of wind turbine generator sets.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a device for detecting the conduction of the lightning protection line of the blade of a wind turbine, comprising a metal fixing ring, a lifting cable fixing lug and a metal woven net bag, the lifting cable fixing lug is provided with a cable test terminal, the metal woven net bag is provided with a metal belt, the metal belt is provided with a pin contactor, and the pin contactor is used to scratch or penetrate the oxide layer of the blade lightning arrester.

[0007] Furthermore, the metal woven net bag has a hemispherical shape.

[0008] Furthermore, the metal belt comprises two arc-shaped belts arranged in a cross shape.

[0009] Furthermore, a spring ring is provided on the metal braided net bag, and the spring ring is used to clamp the clamping pin contactor on the blade lightning receptor.

[0010] Furthermore, the number of the spring coils is greater than two.

[0011] The beneficial effects of the utility model are: a device for detecting the conduction of lightning protection lines on blades of wind turbines, the metal mesh bag is deformed and tightened by the force applied to the cable on the lifting cable fixing lug, and contacts the lightning receptor on the top of the blade, the metal belt contacts the lightning receptor due to the deformation and tightening of the bottom of the metal woven mesh bag, the metal needle on the needle contactor can penetrate or scratch the oxide layer on the lightning receptor, the contact is good, and the influence of the oxide layer on the measurement is reduced, the cable test terminal on the fixing ring is connected to the test cable, and the two ends of the test loop are formed by the metal woven mesh bag and the pre-buried wire in the blade, and the two ends of the loop are connected to the measuring instrument and equipment to complete the blade pre-buried wire conduction test. The device for detecting the conduction of lightning protection lines on blades of wind turbines provided by the utility model can make the blade conduction test more convenient and safe, save time and labor, greatly shorten the construction time, improve the work efficiency of personnel, and reduce personnel safety at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a device for detecting the conduction of lightning protection wires on blades of wind turbine generator sets;

[0013] Figure 2 Another structural schematic diagram of a device for detecting the conduction of lightning protection wires on blades of wind turbine generator sets;

[0014] Description of labels:

[0015] 1. Metal fixing ring; 2. Lifting cable fixing lug; 21. Cable test terminal; 3. Metal braided net bag; 31. Metal belt; 311. Pin contactor; 32. Spring coil. DETAILED DESCRIPTION

[0016] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0017] The utility model provides a device for conducting detection of lightning protection lines of blades of wind turbine generator sets, which is used for lightning protection detection operations of blades of wind turbine generator sets.

[0018] Please refer to Figure 1 to Figure 2 As shown, the utility model is a device for detecting the conduction of lightning protection lines of blades of wind turbines, comprising a metal fixing ring 1, provided with a lifting cable fixing ear 2 and a metal woven net bag 3, the lifting cable fixing ear 2 is provided with a cable test terminal 21, the metal woven net bag 3 is provided with a metal belt 31, the metal belt 31 is provided with a pin contactor 311, and the pin contactor 311 is used to scratch or penetrate the oxide layer of the blade lightning receptor.

[0019] From the above description, it can be seen that the beneficial effects of the utility model are: a device for detecting the conduction of lightning protection lines on blades of wind turbines, the metal mesh bag is deformed and tightened by the force of the cable on the lifting cable fixing ear 2, and contacts the lightning receptor on the top of the blade, the metal belt 31 contacts the lightning receptor due to the deformation and tightening of the bottom of the metal woven mesh bag 3, the metal needle on the needle contactor 311 can penetrate or scratch the oxide layer on the lightning receptor, the contact is good, and the influence of the oxide layer on the measurement is reduced, the cable test terminal 21 on the fixing ring is connected to the test cable, and the two ends of the test loop are formed by the metal woven mesh bag 3 and the pre-buried wire in the blade, and the two ends of the loop are connected to the measuring instrument and equipment, and the blade pre-buried wire conduction test can be completed. The device for detecting the conduction of lightning protection lines on blades of wind turbines provided by the utility model can make the blade conduction test more convenient and safe, save time and labor, greatly shorten the construction time, improve the work efficiency of personnel, and reduce personnel safety at the same time.

[0020] In an optional embodiment, the metal woven net bag 3 has a hemispherical shape.

[0021] As can be seen from the above description, the pin contactor 311 is installed at the bottom of the hemispherical shape.

[0022] In an optional embodiment, the metal belt 31 includes two arc-shaped belts arranged in a cross shape.

[0023] From the above description, it can be seen that the cross-shaped structure is conducive to enhancing the force on the net bag, the metal belt 31 is deformed by the force, and after the blade enters the device and touches the bottom, the needle contact device closes and clamps the lightning arrester.

[0024] In an optional embodiment, a spring ring 32 is provided on the metal braided net bag 3, and the spring ring 32 is used to clamp the clamping pin contactor 311 on the blade lightning receptor.

[0025] From the above description, it can be seen that three springs are provided on the outer layer of the bottom of the net bag. After the blade lightning receptor enters the metal net bag, the pin contactor 311 can be further pressed against the lightning receptor, so that the net bag can be well connected with the lightning receptor.

[0026] In an alternative embodiment, the number of the spring coils 32 is greater than two.

[0027] The working principle of the utility model is: connect two cables to the two lifting lugs of the device, the cable operator stands on the cabin, presses the test cable on the terminal of the lifting lug, and ties the test cable to one of the cables to the cabin; the third lifting lug is connected to the ground cable. During measurement, one of the blades of the wind turbine is vertically downward, the cabin personnel pull up the device, and cooperate with the ground personnel to ensure that the device is in contact with the blade lightning receptor. After contact, the cabin personnel connect the device to force it, and the pin contact device inside the device is in full contact with the blade lightning receptor. Then, one end of the test cable and the cable end at the root of the blade are connected to the measuring device, and the device can be started to complete the conduction and resistance test.

[0028] Please refer to Figure 1 to Figure 2 As shown, the first embodiment of the utility model is: a device for detecting the conduction of the lightning protection line of the blade of a wind turbine, comprising a metal fixing ring 1, provided with a lifting cable fixing ear 2 and a metal woven net bag 3, the lifting cable fixing ear 2 is provided with a cable test terminal 21, the metal woven net bag 3 is provided with a metal belt 31, the metal belt 31 is provided with a pin contactor 311, and the pin contactor 311 is used to scratch or penetrate the oxide layer of the blade lightning arrester.

[0029] The metal braided net bag 3 has a hemispherical shape. The metal belt 31 includes two arc-shaped belts arranged in a cross shape. The metal braided net bag 3 is provided with a spring ring 32, and the spring ring 32 is used to clamp the clamping pin contactor 311 on the blade lightning arrester. The number of the spring rings 32 is greater than two.

[0030] In summary, the utility model is used for the device for detecting the conduction of the lightning protection line of the blade of a wind turbine. The metal mesh bag is deformed and tightened by the force of the cable on the lifting cable fixing ear, and contacts the lightning rod on the top of the blade. The metal belt contacts the lightning rod due to the deformation and tightening of the bottom of the metal woven mesh bag. The metal needle on the needle contactor can penetrate or scratch the oxide layer on the lightning rod, and the contact is good, reducing the influence of the oxide layer on the measurement. The cable test terminal on the fixing ring is connected to the test cable, and the two ends of the test loop are formed by the metal woven mesh bag and the pre-buried wire in the blade. The two ends of the loop are connected to the measuring instrument and equipment to complete the blade pre-buried wire conduction test. The device for detecting the conduction of the lightning protection line of the blade of a wind turbine provided by the utility model can make the blade conduction test more convenient and safe, save time and labor, greatly shorten the construction time, improve the work efficiency of personnel, and reduce personnel safety at the same time.

[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A device for detecting the conduction of lightning protection wires on blades of wind turbine generator sets, characterized in that: It comprises a metal fixing ring, a lifting cable fixing eye and a metal braided net bag, the lifting cable fixing eye is provided with a cable test terminal, a metal belt is provided in the metal braided net bag, a pin contactor is provided on the metal belt, and the pin contactor is used to scratch or penetrate the oxide layer of the blade lightning arrester.

2. The device for detecting the conduction of lightning protection wires of wind turbine blades according to claim 1 is characterized in that: The metal braided net bag has a hemispherical shape.

3. The device for detecting the conduction of lightning protection wires of wind turbine blades according to claim 1, characterized in that: The metal belt comprises two arc-shaped belts arranged in a cross shape.

4. The device for detecting the conduction of lightning protection wires of wind turbine blades according to claim 1, characterized in that: The metal braided net bag is provided with a spring ring, and the spring ring is used to clamp the clamping pin contactor on the blade lightning receptor.

5. The device for detecting the conduction of lightning protection wires of wind turbine blades according to claim 4 is characterized in that: The number of the spring coils is greater than two.

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