A lightning protection line laying device for wind turbine blades

Abstract

The present invention relates to the technical field of wind turbine blade manufacturing, and more specifically, to a lightning conductor laying device for wind turbine blades, comprising a vehicle body, a clamping mechanism, a roller and a bonding mechanism provided on the vehicle body, a through slot for the lightning conductor to pass through the vehicle body, the clamping mechanism comprising a swing arm rotatably arranged in the middle on the vehicle body and a lifting drive member for driving the swing arm to rise and fall, one end of the swing arm is located outside the vehicle body and is provided with a rolling composite wheel capable of rolling with a web mold, the other end is located in the vehicle body and is provided with a pressure block, the pressure block can cooperate with the bottom of the through slot in a rolling cooperation state between the rolling composite wheel and the web mold to clamp the lightning conductor, a torsion spring is provided at the rotation cooperation part of the swing arm and the vehicle body, the torsion spring can drive the swing arm to rotate after the rolling composite wheel passes over the edge of the web mold, and the pressure block releases the lightning conductor. The present invention can improve the positioning and fixing effect of the fiber cloth on the lightning conductor while automatically completing the laying and fixing of the lightning conductor on the web mold.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine blade manufacturing and processing, in particular to a lightning protection line laying device for wind turbine blades. Background Art

[0002] The lightning conductor on the wind turbine blade is used to transmit the current on the wind turbine blade struck by lightning, and transmit the current to the ground through other grounding components to ensure the safety of the wind turbine blade. The lightning conductor is usually laid and fixed on the web mold during the processing of the wind turbine blade, and then integrally cast with the web mold. The traditional laying of lightning conductors relies on manual labor, which is labor-intensive, and the laying effect is affected by the skills and quality of the personnel, and the web mold is easily damaged by personnel stepping on it.

[0003] In order to solve the above problems, the applicant proposed an automatic laying device for lightning conductors of wind turbine blades in CN202210537733.3. The lightning conductor laying device moves along the web mold to pull the lightning conductor for straight laying. At the same time, the lightning conductor is covered with fiber cloth and bonded to the web mold to complete the fixation of the lightning conductor on the web mold, thereby realizing automatic laying of lightning conductors, reducing manual labor intensity, improving production efficiency, and avoiding damage to the web mold caused by stepping on it.

[0004] However, during the implementation of this technical solution, it was found that when the lightning conductor laying device moves along the web mold, the fiber cloth remains relatively still with the web mold due to being bonded to the web mold, but the lightning conductor is pulled forward by the lightning conductor laying device and maintains relative movement with the web mold. As a result, the lightning conductor in the moving state is easily bonded to the bottom surface of the fiber cloth, pulling the fiber cloth to move and produce displacement wrinkles, and even completely tearing off the fiber cloth bonded to the web mold, resulting in the problem that the lightning conductor cannot be effectively fixed and positioned. Summary of the invention

[0005] The present invention aims to provide a lightning conductor laying device for wind turbine blades, which can automatically complete the laying and fixing of the lightning conductor on a web mold while improving the positioning and fixing effect of the fiber cloth on the lightning conductor.

[0006] In order to solve the above technical problems, the specific scheme adopted by the present invention is: a lightning conductor laying device for wind turbine blades, comprising a vehicle body capable of moving along the web mold, a clamping mechanism for clamping the lightning conductor, a roller for winding the fiber cloth and a bonding mechanism for covering the fiber cloth on the lightning conductor and bonding it to the web mold are provided on the vehicle body, a through groove for the lightning conductor to pass through is provided on the vehicle body, the clamping mechanism comprises a rocker arm rotatably arranged on the vehicle body in the middle and a lifting drive member for driving the rocker arm to rise and fall, one end of the rocker arm is located outside the vehicle body and is provided with a rolling composite wheel capable of rolling with the web mold, and the other end is located in the vehicle body and is provided with a pressure block, the pressure block can cooperate with the bottom of the through groove in a rolling cooperation state between the rolling composite wheel and the web mold to clamp the lightning conductor, and a torsion spring is provided at the rotating cooperation portion between the rocker arm and the vehicle body, the torsion spring can drive the rocker arm to rotate after the rolling composite wheel passes over the edge of the web mold, and cause the pressure block to release the lightning conductor.

[0007] Preferably, a rotating shaft is fixedly provided in the middle of the swing arm, and shaft seats are respectively mounted on both ends of the rotating shaft, and the two shaft seats are both vertically slidably arranged in a slide groove opened on the vehicle body.

[0008] Preferably, the torsion spring is provided between the end of the rotating shaft and the corresponding shaft seat.

[0009] Preferably, the lifting drive member is an electric push rod, the cylinder of the electric push rod is fixed on the vehicle body, a U-shaped frame is connected to the telescopic end of the electric push rod, and mounting holes for the rotating shaft to be mounted are respectively provided at both ends of the U-shaped frame.

[0010] Preferably, the vehicle body is U-shaped, and the two slide grooves are symmetrically distributed on the two side walls of the vehicle body.

[0011] Preferably, the pressure block is hinged to the lower end of a pressure rod, the pressure rod is slidably arranged in a sleeve fixed on the swing rod, the upper end of the pressure rod extends out of the sleeve and is sleeved with a spring, and the two ends of the spring are respectively fixed to the sleeve and the pressure rod.

[0012] Preferably, the middle portion of the rolling composite wheel has a recess for pressing the lightning conductor.

[0013] Preferably, the cross-sectional shape of the recessed portion is a minor arc.

[0014] The vehicle body in the present invention is provided with a clamping mechanism, and a rolling composite wheel is arranged on one side of the clamping mechanism. The rolling composite wheel can roll with the web mold, so that the pressure block on the other side of the clamping mechanism presses the end of the lightning conductor tightly against the bottom of the through groove on the vehicle body, thereby enabling the vehicle body to pull the lightning conductor onto the web mold during the movement. After the vehicle body moves to the edge of the web mold and the rolling composite wheel passes over the edge of the web mold, the rolling composite wheel can be driven by a torsion spring to be located above the end of the lightning conductor, thereby enabling the rolling composite wheel to press and fix the lightning conductor on the web mold during the reverse movement of the vehicle body. At this time, the fiber cloth covers the lightning conductor and is bonded to the web mold for laying, and the lightning conductor and the fiber cloth are both in a stationary state relative to the web mold, thereby avoiding the problem of wrinkles caused by the lightning conductor pulling the fiber cloth due to relative movement or the fiber cloth peeling off from the web mold and failing to effectively fix the lightning conductor, thereby improving the bonding and fixing quality of the lightning conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional structure diagram of a lightning protection line laying device for wind turbine blades of the present invention;

[0016] Figure 2-4 for Figure 1 In the state shown, it is a schematic diagram of the state of the vehicle body in the present invention after traveling to different positions;

[0017] Figure 5 for Figure 1 AA-direction cross-sectional structural diagram;

[0018] Figure 6 for Figure 5 A schematic diagram of the state after the middle lifting drive component drives the swing rod to rise;

[0019] Figure 7 for Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0020] Markings in the figure: 1. body, 101. through groove, 102. roller, 103. slide groove, 2. web mold, 3. clamping mechanism, 301. pressure block, 302. sleeve, 303. stopper, 304. spring, 305. pressure rod, 306. lifting drive member, 307. rotating shaft, 308. rocker arm, 309. rolling composite wheel, 309-1. recess, 309-2. flat part, 310. U-shaped frame, 311. boss, 312. axle seat, 313. torsion spring, 4. lightning conductor. DETAILED DESCRIPTION

[0021] like Figure 1As shown, a lightning conductor laying device for wind turbine blades of the present invention has a main structure of a vehicle body 1 that can move in two directions along the web mold 2 by relying on the roller 102 and related driving parts arranged at the bottom thereof, and a clamping mechanism 3, a roller and a bonding mechanism are arranged on the vehicle body 1. The clamping mechanism 3 is used to clamp and fix the free end of the lightning conductor 4, and preliminarily lay the lightning conductor 4 on the web mold 2 as the vehicle body 1 moves from the left edge to the right edge of the web mold 2. The other end of the lightning conductor 4 in the figure is wound on a lightning conductor unwinding device and a lightning conductor correction device similar to those in the patent involved in the background technology, so as to eliminate the distortion of the lightning conductor 4 and facilitate straight-line laying. The reel is used to roll the fiber cloth, and the bonding mechanism is used to cover the lightning conductor 4 with the fiber cloth and bond the fiber cloth to the belly plate mold 2 to fix the lightning conductor 4 when the vehicle body 1 moves in the reverse direction from the right edge of the belly plate mold 2 to the left edge. Its structure and function are the same as the relevant contents in the patent involved in the background technology, so it will not be described here, and it is not marked in the figure. The following is an explanation of the specific laying method of the clamping mechanism 3 of the present invention and the lightning conductor 4 of the present invention:

[0022] Combination Figure 1 and Figure 5 As shown, the vehicle body 1 of the present invention is a U-shaped structure, with both left and right ends open and forming a through slot 101 for the lightning protection line 4 to pass through. The clamping mechanism 3 mainly includes an L-shaped swing rod 308 and an electric push rod as a lifting drive member 306 for driving the swing rod 308 to rise and fall.

[0023] A rotating shaft 307 is fixedly arranged near the middle of the swing rod 308 and is arranged horizontally. The two ends of the rotating shaft 307 are respectively rotatably mounted in the corresponding shaft seats 312, and the shaft seats 312 are vertically slidably mounted in the slide groove 103 provided on the side wall of the vehicle body 1. The cylinder of the electric push rod is fixed to the top of the vehicle body 1 through a bracket (not shown in the figure), and its telescopic end is arranged downward and is provided with a U-shaped frame 310. The opening of the U-shaped frame 310 is arranged downward, and holes for the rotating shaft 307 to pass through are arranged at both ends of the U-shaped frame 310, that is, the rotating shaft 307 and the swing rod 308 connected to the rotating shaft 307 can be driven to rise and fall vertically through the telescopic rod of the electric push rod. Bosses 311 are arranged near the corresponding shaft seats 312 on the rotating shaft 307, and torsion springs 313 are arranged on the rotating shaft 307 between the bosses 311 and the shaft seats 312. The right end of the swing rod 308 is located outside the right side of the vehicle body 1 and is provided with a rotatable rolling composite wheel 309; the left end of the swing rod 308 is located in the through slot 101 and is provided with a pressing block 301. Figure 1As the vehicle body 1 moves to the right on the web mold 2, the rolling composite wheel 309 rolls with the upper edge of the web mold 2, and the pressing block 301 cooperates with the bottom of the through groove 101 to press the lightning conductor 4, that is, the lightning conductor 4 is fixed, so that the lightning conductor 4 can be initially laid on the web mold 2 as the vehicle body 1 is pulled. At this time, the torsion spring 313 is in a deformed state and has a tendency to drive the swing arm 308 to rotate clockwise around the rotating shaft 307.

[0024] In the specific implementation of the present invention, the free end of the lightning conductor 4 is first passed through the through slot 101 from left to right and the free end of the lightning conductor 4 is extended to the right to pass through a part, so that the free end of the lightning conductor 4 is bent and drooped under the action of its own gravity. Then the vehicle body 1 can be driven to continuously move rightward from the left edge of the web mold 2 to achieve Figure 1 As shown, the lightning conductor 4 is initially laid on the web mold 2 near the right edge of the web mold 2. Figure 2 After the state shown, on the one hand, the right end of the lightning conductor 4 passes over the right edge of the web mold 2 and droops naturally, and on the other hand, after the rolling composite wheel 309 also passes over the right edge of the web mold 2, it loses the support of the web mold 2, so that the swing rod 308 rotates under the action of the torsion spring 313, and the rolling composite wheel 309 rotates with the swing rod 308 to the lower right side of the top surface of the web mold 2. At this time, Figure 3 and Figure 6 As shown, the telescopic end of the electric push rod retracts to make the swing rod 308 move upward as a whole, and the upward movement height is slightly greater than the outer diameter of the lightning conductor 4, and then the vehicle body 1 can be driven to move to the left to achieve the following Figure 4 As shown, the right end of the lightning conductor 4 and the rolling composite wheel 309 are successively placed on the right edge of the web mold 2, and the rolling composite wheel 309 is rolled on the lightning conductor 4, so as to fix the lightning conductor 4. At this time, the fiber cloth can be unwound by the reel and covered on the lightning conductor 4 and bonded to the web mold 2 by the bonding mechanism. During the process, the lightning conductor 4 is positioned on the web mold 2 by the pressing action of the rolling composite wheel 309, and the fiber cloth is fixed on the web mold 2 by bonding. The laying part of the lightning conductor 4 and the fiber cloth on the web mold 2 remains relatively still, which prevents the fiber cloth from being pulled and affecting the laying effect of the lightning conductor 4.

[0025] The purpose of lifting the swing rod 308 and the pressing block 301 and the roller 102 thereon by the lifting driving member 306 to be slightly larger than the outer diameter of the lightning protection line 4 is that after the lifting, Figure 4 In the state shown, after the rolling composite wheel 309 presses on the lightning conductor 4 instead of the upper edge of the web mold 2, the pressing block 301 no longer presses on the lightning conductor 4, but maintains a certain distance from the lightning conductor 4, thereby releasing the clamping and fixing effect of the clamping mechanism 3 on the lightning conductor 4, so that the lightning conductor 4 and the web mold 2 remain relatively still.

[0026] In addition, the pressing block 301 in the present invention is not directly fixed to the left end of the swing rod 308, but is hingedly connected to the lower end of a vertically distributed pressing rod 305, and the pressing rod 305 is slidably mounted in a sleeve 302 fixed to the left end of the swing rod 308, and a stopper 303 is fixedly provided at the upper end of the pressing rod 305, and a spring 304 is arranged on the pressing rod 305 between the stopper 303 and the sleeve 302, and the upper and lower ends of the spring 304 are respectively fixed to the upper edges of the stopper 303 and the sleeve 302. With this mechanism, when the pressing block 301 cooperates with the bottom of the through slot 101 to clamp the lightning conductor 4, the hinged connection between the pressing block 301 and the pressing rod 305 can realize the automatic adjustment of the posture of the pressing block 301, that is, the bottom of the pressing block 301 can press the lightning conductor 4 as a whole, rather than a certain point on the pressing block 301 contacting the lightning conductor 4, thereby effectively avoiding the damage to the lightning conductor 4 caused by point contact. The spring 304 can provide a clamping force and a certain buffering effect for the lightning conductor 4, that is, when the car body 1 is placed at the left edge of the web mold 2 before the laying work begins, when the rolling composite wheel 309 contacts the upper edge of the web mold 2, the weight of the car body 1 drives the swing rod 308 to rotate in the counterclockwise direction, and the pressing block 301 rotates toward the lightning conductor 4. Before the roller 102 of the car body 1 contacts the web mold 2, the pressing block 301 contacts the lightning conductor 4, and as the roller 102 of the car body 1 contacts the web mold 2, the pressing rod 305 is pushed upward to compress the spring 304, and finally the lightning conductor 4 is pressed tightly against the bottom of the through slot 101 by the thrust of the spring 304 to be clamped and fixed.

[0027] like Figure 7 As shown, the main body of the rolling composite wheel 309 of the present invention is cylindrical, and a concave portion 309-1 with a minor arc cross section is provided at the center of its circumference, and flat portions 309-2 are formed at other positions of its circumference. Figure 1 In the state shown, the flat portion 309-2 contacts and rolls with the web mold 2. Figure 4 In the state shown, on the one hand, the recessed portion 309-1 is provided for the lightning conductor 4 to be inserted, and the lightning conductor 4 is pressed tightly against the web mold 2 to keep relatively still with the web mold 2. The cross section of the recessed portion 309-1 is set as a minor arc, which is beneficial to increase the contact area with the lightning conductor 4, thereby increasing the holding strength and stability of the lightning conductor 4. On the other hand, the flat portion 309-2 is pressed on both sides of the lightning conductor 4 of the fiber cloth bonded to the web mold 2, thereby producing a rolling effect on the fiber cloth, so that the fiber cloth can be tightly bonded to the web mold 2, and then the lightning conductor 4 and the web mold 2 are firmly fixed.

Claims

1. A lightning conductor laying device for a wind turbine blade, comprising a vehicle body (1) capable of moving along a web mold (2), the vehicle body (1) being provided with a clamping mechanism (3) for clamping a lightning conductor (4), a roller for winding a fiber cloth, and a bonding mechanism for covering the fiber cloth on the lightning conductor (4) and bonding the fiber cloth to the web mold (2), characterized in that: The vehicle body (1) is provided with a through slot (101) for the lightning protection line (4) to pass through, and the clamping mechanism (3) comprises a swing rod (308) whose middle portion is rotatably arranged on the vehicle body (1) and a lifting drive member (306) for driving the swing rod (308) to rise and fall, one end of the swing rod (308) is located outside the vehicle body (1) and is provided with a rolling composite wheel (309) capable of rolling with the web mold (2), and the other end is located inside the vehicle body (1) and is provided with a pressure block (301 ), the pressing block (301) can cooperate with the bottom of the through groove (101) to clamp the lightning conductor (4) when the rolling composite wheel (309) and the web mold (2) are in rolling cooperation. The rotation cooperation portion of the swing arm (308) and the vehicle body (1) is provided with a torsion spring (313). The torsion spring (313) can drive the swing arm (308) to rotate after the rolling composite wheel (309) passes over the edge of the web mold (2), and enables the pressing block (301) to release the lightning conductor (4).

2. A lightning protection line laying device for wind turbine blades according to claim 1, characterized in that: A rotating shaft (307) is fixedly provided in the middle of the swing rod (308), and shaft seats (312) are respectively mounted on both ends of the rotating shaft (307), and the two shaft seats (312) are both vertically slidably arranged in a slide groove (103) provided on the vehicle body (1).

3. A lightning conductor laying device for wind turbine blades according to claim 2, characterized in that: The torsion spring (313) is provided between the end of the rotating shaft (307) and the corresponding shaft seat (312).

4. A lightning protection line laying device for wind turbine blades according to claim 2, characterized in that: The lifting drive member (306) is an electric push rod, the cylinder of which is fixed on the vehicle body (1), the telescopic end of the electric push rod is connected to a U-shaped frame (310), and both ends of the U-shaped frame (310) are respectively provided with mounting holes for the rotating shaft (307) to be mounted.

5. A lightning conductor laying device for wind turbine blades according to claim 2, characterized in that: The vehicle body (1) is U-shaped, and the two slide grooves (103) are symmetrically distributed on two side walls of the vehicle body (1).

6. A lightning conductor laying device for wind turbine blades according to claim 1, characterized in that: The pressure block (301) is hinged to the lower end of a pressure rod (305). The pressure rod (305) is slidably arranged in a sleeve (302) fixed on a swing rod (308). The upper end of the pressure rod (305) extends out of the sleeve (302) and is sleeved with a spring (304). The two ends of the spring (304) are respectively fixed to the sleeve (302) and the pressure rod (305).

7. A lightning conductor laying device for wind turbine blades according to claim 1, characterized in that: The middle part of the rolling composite wheel (309) has a recess (309-1) for pressing the lightning conductor (4).

8. A lightning conductor laying device for wind turbine blades according to claim 7, characterized in that: The cross-sectional shape of the concave portion (309-1) is a minor arc.

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