Tower platform device for wind turbine blade lightning arrester maintenance

Abstract

The present application provides a tower platform device for maintaining wind turbine blade lightning rods, including a holding frame device sleeved on the outer ring of the tower segment, the holding frame device is provided with a guide cylinder, the guide cylinder is provided with a supporting leg device, the supporting leg device is provided with a flippable swing arm device, the end of the swing arm device is provided with a platform arm, and the swing arm device is flipped to make the platform arm close to the side of the wind turbine blade, thereby solving the problem of difficulty and poor safety in maintaining wind turbine blade lightning rods.

Description

Technical Field

[0001] The present invention relates to the field of wind turbine maintenance, and in particular to a tower platform device for maintaining lightning receptors of wind turbine blades. Background Art

[0002] Wind turbines are typically located in open areas of high ground or offshore. Due to their high altitude and the absence of surrounding objects, they are susceptible to lightning strikes, which can cause charring, perforation, or even fracture of the blade surfaces. Existing lightning protection measures typically place lightning receptors at intervals along the length of the sleeve, at the blade tip, and on both sides of the blade. These receptors are connected together by cables and then connected to the ground via leads.

[0003] Lightning terminals require regular testing, and damaged ones need to be replaced promptly. Since the sleeve is typically equipped with an elevator, the top terminal is relatively easy to replace. However, the blades are suspended and enclosed, making the interior inaccessible. Traditionally, workers have used lifting equipment such as cranes and ladders to move to the vicinity of the blade lightning terminals for replacement and maintenance. This method not only occupies the lifting equipment for a long time, but is also prone to shaking, compromising worker safety. Summary of the Invention

[0004] The present invention provides a tower platform device for maintaining wind turbine blade lightning receptors, which solves the problem of great difficulty and poor safety in maintaining wind turbine blade lightning receptors.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a tower platform device for maintaining wind turbine blade lightning rods, including a holding frame device that is sleeved on the outer ring of the tower segment, the holding frame device is provided with a guide cylinder, the guide cylinder is provided with a supporting leg device, the supporting leg device is provided with a flippable swing arm device, the end of the swing arm device is provided with a platform arm, and the swing arm device is flipped to make the platform arm close to the side of the wind turbine blade.

[0006] In a preferred solution, a reserved hole is provided on the tower segment, a plurality of connecting ears are provided on the bracket device along the circumference, a slidable latch rod is provided in the connecting ear, and one end of the latch rod is inserted into the reserved hole.

[0007] In a preferred solution, the holding frame device includes a first half frame and a second half frame that are symmetrically arranged, and both ends of the first half frame and the second half frame are detachably connected to the guide cylinder.

[0008] In the preferred solution, the supporting leg device includes a plurality of vertical racks and transverse racks. The supporting leg device has a hollow structure. A hinge seat is provided inside the supporting leg device. One end of the swing arm device is hinged to the hinge seat. The swing arm device can be stored inside the supporting leg device. An opening is provided on one side of the supporting leg device. A limit stop is provided at the lower end of the opening. The swing arm device is flipped out from the opening and the lower end of the swing arm device is resting against the limit stop.

[0009] In a preferred solution, rotatable guide wheels are provided at the upper and lower ends of the guide cylinder, and a plurality of vertical guide rails are provided on the outer side of the support leg device, and each guide rail abuts against each guide wheel.

[0010] In a preferred solution, a rotatable screw rod is provided on one side of the supporting leg device, a lifting motor is provided at one end of the screw rod, a nut seat is provided on the outside of the guide cylinder, and the screw rod and the nut seat are sleeved.

[0011] In the preferred solution, the swing arm device includes a base section and a telescopic section, the base section and the telescopic section are slidably connected, the end of the base section is hinged to the hinge seat so that the base section can swing vertically, and the end of the telescopic section is hinged to the platform arm so that the platform arm can rotate horizontally.

[0012] In the preferred solution, there are two guide cylinders arranged symmetrically, each guide cylinder is provided with a support leg device, the platform arm of each support leg device is provided with multiple connecting rod mounting holes, a connecting rod is provided between the two horizontally arranged platform arms, and the connecting rod is inserted into each connecting rod mounting hole.

[0013] In the preferred solution, a swing arm shaft is provided at the hinged end of the base section, a first sprocket is mounted on the swing arm shaft, a first avoidance gap is provided on the side wall of the base section on one side of the swing arm shaft, a swing arm motor is provided in the supporting leg device, a second sprocket is provided at the shaft end of the swing arm motor, and a chain device is also provided, the second sprocket and the first sprocket are driven by the chain device; a second avoidance gap is provided on the side of one end of the telescopic joint close to the base section, a drive cylinder mounting seat is provided at the second avoidance gap inside the base section, a hinged linear drive cylinder is provided at one end of the drive cylinder mounting seat, a drive cylinder connecting seat is provided at the other end of the linear drive cylinder, and the drive cylinder connecting seat is connected to the inner wall of the telescopic joint.

[0014] In the preferred solution, a platform arm connecting shaft is provided at the end of the telescopic joint away from the base section, a shaft sleeve portion is provided at one end of the platform arm, the shaft sleeve portion is rotatably sleeved with the platform arm connecting shaft, a plurality of through angle positioning holes are provided along the circumferential direction of the platform arm connecting shaft, an angle positioning pin is provided at the shaft sleeve portion, and the angle positioning pin is inserted into the angle positioning hole.

[0015] The beneficial effects of the present invention are as follows: a holding frame device is fixed to the outer wall of the wind turbine tower, and the connection is relatively stable. A shorter platform arm is extended outward as the basic structure, which facilitates the external installation of an operating platform and a guardrail structure, and greatly improves personnel safety. The holding frame device adopts a splicable design and can be prefabricated in the factory and then quickly installed on site. It is equipped with a liftable support leg device, and the platform arm can be stored inside the support leg device or swung out horizontally as the swing arm device rotates. After a single hoisting and installation of the holding frame device, the maintenance of the lightning rods at various heights of the blades can be completed without occupying the hoisting equipment or the top tube equipment for a long time. Double platform arms are parallel to each other and the cantilever ends are connected to improve the stability of the platform arms. The double platform arms can be arranged at intervals and distributed on both sides of the blade, and the lightning rods on both sides of the blade can be maintained synchronously, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and examples.

[0017] Figure 1 It is a schematic diagram of the implementation and application of the present invention.

[0018] Figure 2 It is a side view of the spaced arrangement of the dual platform arms of the present invention.

[0019] Figure 3 It is a top view of the dual platform arms of the present invention arranged side by side and connected.

[0020] Figure 4 It is a top view of the spaced arrangement of the dual platform arms of the present invention.

[0021] Figure 5 It is the overall structural diagram of the present invention.

[0022] Figure 6 It is a structural diagram of the holding frame device of the present invention.

[0023] Figure 7 It is a schematic diagram of the swing arm device of the present invention retracting the supporting leg device.

[0024] Figure 8 It is a schematic diagram of the swing arm device of the present invention being swung out to a horizontal position.

[0025] Figure 9 It is a schematic diagram of the driving structure of the swing arm device of the present invention.

[0026] Figure 10 It is a schematic diagram of the platform arm angle positioning structure of the present invention.

[0027] Figure 11 It is a schematic diagram of the guide structure of the guide cylinder of the present invention.

[0028] In the figure: the holding frame device 1; the first half frame 101; the second half frame 102; the connecting ear 103; the latch rod 104; the first nut 105; the second nut 106; the supporting leg device 2; the guide rail 201; the vertical frame rod 202; the horizontal frame rod 203; the hinge seat 204; the opening 205; the gear lever 206; the limit stop 207; the screw rod 208; the lifting motor 209; the swing arm device 3; the base section 301; the telescopic section 302; the swing arm shaft 303; the first sprocket wheel 304; the first avoidance gap 305; the second avoidance gap Gap 306; drive cylinder mounting seat 307; linear drive cylinder 308; drive cylinder connecting seat 309; platform arm connecting shaft 310; angle positioning hole 311; guide cylinder 4; guide wheel 401; nut seat 402; platform arm 5; platform mounting hole 501; connecting rod mounting hole 502; sleeve portion 503; angle positioning pin 504; operating platform 6; tower segment 7; reserved hole 701; wind turbine blade 8; lightning arrester 9; connecting rod 10; swing arm motor 11; second sprocket 1101; chain device 12; temporary platform 13. DETAILED DESCRIPTION

[0029] like Figure 1-11 In the present invention, a tower platform device for maintaining wind turbine blade lightning rods includes a holding frame device 1 that is sleeved on the outer ring of the tower segment 7, a guide cylinder 4 is provided on the holding frame device 1, a support leg device 2 is provided in the guide cylinder 4, a flippable swing arm device 3 is provided on the support leg device 2, a platform arm 5 is provided at the end of the swing arm device 3, and the swing arm device 3 is flipped to make the platform arm 5 close to the side of the wind turbine blade 8.

[0030] After the swing arm device 3 is flipped over, the platform arm 5 approaches horizontality. The platform arm 5 has a certain width for people to stand on. The platform arm 5 is provided with multiple platform mounting holes 501 and mounting bolts, which can be used to fix the operating platform 6. The operating platform 6 can also be installed on the platform arm 5. People maintain and disassemble the lightning arresters 9 on the tips and sides of the wind turbine blades 8 on the operating platform 6.

[0031] There are two symmetrically arranged guide cylinders 4, and two supporting leg devices 2 are also provided. One is provided in each guide cylinder 4 to ensure that the center of gravity tends to the center. A swing arm device 3 is provided in each supporting leg device 2.

[0032] In the preferred solution, a reserved hole 701 is provided on the tower segment 7, and a plurality of connecting ears 103 are provided circumferentially on the holding frame device 1. A slidable latch rod 104 is provided in the connecting ear 103, and one end of the latch rod 104 is inserted into the reserved hole 701.

[0033] The wind turbine tower column is composed of multiple tower segments 7 assembled from top to bottom. During factory processing, each tower segment 7 is pre-machined with pre-set holes 701 corresponding to the connecting ears 103 of the bracket assembly 1. The bracket assembly 1 can be hoisted by a crane or lifted to tower segments 7 at different heights using a jacking device, where it is securely connected to the tower segments 7.

[0034] The holding frame device 1 is provided with a plurality of connecting ears 103 at both ends. A through hole is provided in the connecting ear 103. The reserved hole 701 can be a threaded hole. The connecting ear 103 is a screw. The front end of the connecting ear 103 is inserted into the reserved hole 701 and is threadedly connected to the reserved hole 701.

[0035] After each connecting ear 103 is screwed into each reserved hole 701, the first nut 105 at the reserved hole 701 is tightened, and then the second nuts 106 on both sides of the connecting ear 103 on the latch rod 104 are tightened, and the bracket device 1 is then fixed on the tower segment 7.

[0036] In a preferred solution, the holding frame device 1 includes a first half frame 101 and a second half frame 102 that are symmetrically arranged, and both ends of the first half frame 101 and the second half frame 102 are detachably connected to the guide cylinder 4.

[0037] The first half frame 101 and the second half frame 102 are U-shaped, V-shaped or semicircular, with mounting flanges at the ends and bolts on the mounting flanges. The side wall of the guide cylinder 4 is provided with bolt holes, which can be connected to the mounting flanges of the first half frame 101 and the second half frame 102.

[0038] In the preferred embodiment, the supporting leg device 2 includes a plurality of vertical rods 202 and a horizontal rod 203. The supporting leg device 2 has a hollow structure. A hinge seat 204 is provided inside the supporting leg device 2. One end of the swing arm device 3 is hinged to the hinge seat 204. The swing arm device 3 can be stored inside the supporting leg device 2. An opening 205 is provided on one side of the supporting leg device 2. A limit stop 207 is provided at the lower end of the opening 205. The swing arm device 3 is flipped out from the opening 205 and the lower end of the swing arm device 3 is resting on the limit stop 207.

[0039] A detachable lever 206 is also provided at the opening 205. The lever 206 is inserted into the vertical frame rod 202 and is threadedly connected to the vertical frame rod 202 at one end. When the lever 206 is inserted, the side of the swing arm device 3 is stopped and cannot be turned out.

[0040] In a preferred solution, rotatable guide wheels 401 are provided at the upper and lower ends of the guide cylinder 4 , and a plurality of vertical guide rails 201 are provided on the outer side of the support leg device 2 , and each guide rail 201 abuts against each guide wheel 401 .

[0041] The guide wheel 401 is a V-shaped guide wheel, and the guide rail 201 is an angle steel. When the guide wheel 401 is against the guide rail 201, the supporting leg device 2 will not shake in both horizontal directions.

[0042] In the preferred embodiment, a rotatable screw rod 208 is provided on one side of the supporting leg device 2, a lifting motor 209 is provided on one end of the screw rod 208, a nut seat 402 is provided on the outside of the guide cylinder 4, and the screw rod 208 is sleeved with the nut seat 402.

[0043] The support leg assembly 2 and guide cylinder 4 are pre-assembled on the ground. The first half frame 101 and the second half frame 102 are assembled together at the ground level of the tower column, with the ends mounted on the outer wall of the guide cylinder 4. The assembled structure is then sleeved onto the outside of the tower column and hoisted to a predetermined height, securing the bracket assembly 1 to the tower segment 7. The reverse self-locking nature of the screw rod prevents the support leg assembly 2 from naturally falling.

[0044] In the preferred embodiment, the swing arm device 3 includes a base section 301 and a telescopic section 302, the base section 301 and the telescopic section 302 are slidably connected, the end of the base section 301 is hinged to the hinge seat 204 so that the base section 301 can swing vertically, and the end of the telescopic section 302 is hinged to the platform arm 5 so that the platform arm 5 can rotate horizontally.

[0045] After the base section 301 is lowered, the platform arm 5 rotates to a right angle, lying horizontally on the side of the wind turbine blade 8. The telescopic section 302 can be extended and retracted to adjust the distance between the platform arm 5 and the wind turbine blade 8 to accommodate different wind turbine blade pitch specifications. The platform arm 5 can be adjusted to the inside or outside of the wind turbine blade 8, facilitating maintenance of the lightning receptors 9 on both the inside and outside sides of the wind turbine blade 8.

[0046] In the preferred solution, two guide cylinders 4 are symmetrically arranged relative to the central axis of the tower, and each guide cylinder 4 is provided with a support leg device 2. The platform arm 5 of each support leg device 2 is provided with multiple connecting rod mounting holes 502. A connecting rod 10 is provided between the two horizontally arranged platform arms 5, and the connecting rod 10 is inserted into each connecting rod mounting hole 502.

[0047] The two platform arms 5 are connected by the connecting rod 10 to avoid cantilever support, improve the structural strength, and make it more stable when the operating platform 6 is installed thereon, which is beneficial to the safety of the workers.

[0048] The two platform arms 5 can be arranged at intervals, with the distance between them being the vertically stationary wind turbine blades 8. At this time, the lifting support leg device 2 can drive the two platform arms 5 to move up and down synchronously, and the staff can maintain the lightning rods 9 at each height one by one.

[0049] In the preferred scheme, a swing arm shaft 303 is provided at the hinged end of the base section 301, a first sprocket wheel 304 is sleeved on the swing arm shaft 303, a first avoidance gap 305 is provided on the side wall of the base section 301 on one side of the swing arm shaft 303, a swing arm motor 11 is provided in the supporting leg device 2, a second sprocket 1101 is provided at the shaft end of the swing arm motor 11, and a chain device 12 is also provided, the second sprocket 1101 and the first sprocket wheel 304 are driven by the chain device 12; a second avoidance gap 306 is provided on the side of one end of the telescopic joint 302 close to the base section 301, a drive cylinder mounting seat 307 is provided at the second avoidance gap 306 inside the base section 301, a hinged linear drive cylinder 308 is provided at one end of the drive cylinder mounting seat 307, a drive cylinder connecting seat 309 is provided at the other end of the linear drive cylinder 308, and the drive cylinder connecting seat 309 is connected to the inner wall of the telescopic joint 302.

[0050] When the base section 301 is swung out laterally, the first avoidance gap 305 is below the swing arm shaft 303, avoiding the path of the chain device 12. When the base section 301 is retracted, since the end of the base section 301 is not sealed, it will not interfere with the chain device 12. The swing arm motor 11 is installed on the fixed plate inside the support leg device 2, and the first sprocket wheel 304 is fixed to the swing arm shaft 303. The swing arm motor 11 drives the first sprocket wheel 304 to rotate to drive the base section 301 to swing. Since the base section 301, telescopic section 302 and platform arm 5 are all hollow square tube structures and are not heavy, the swing arm motor 11 uses a reduction motor to meet the driving force requirements.

[0051] The linear drive cylinder 308 is an electric cylinder or a hydraulic cylinder, which drives the telescopic section 302 to extend and retract relative to the base section 301 .

[0052] The driving structure is installed in the inner cavity of the base section 301 and the telescopic section 302 to avoid occupying the external space and causing interference with the side wall of the guide cylinder 4 when the supporting leg device 2 moves up and down.

[0053] In the preferred embodiment, a platform arm connecting shaft 310 is provided at the end of the telescopic joint 302 away from the base joint 301, and a shaft sleeve portion 503 is provided at one end of the platform arm 5. The shaft sleeve portion 503 is rotatably sleeved with the platform arm connecting shaft 310, and the platform arm connecting shaft 310 is provided with a plurality of through angle positioning holes 311 along the circumferential direction. An angle positioning pin 504 is provided at the shaft sleeve portion 503, and the angle positioning pin 504 is inserted into the angle positioning hole 311.

[0054] The shaft sleeve portion 503 can be a screw. Since the platform arm 5 swings laterally, the force driving the swing is not large. The horizontal angle can be adjusted manually and fixed by the angle positioning pin 504 and finally locked by a nut.

[0055] After completing maintenance on a single blade's lightning rod 9, the operator adjusts the platform arm 5 to align with the base section 301 and then moves to the temporary platform 13. The telescopic section 302 retracts into the base section 301, and the swing arm assembly 3 swings back into the support leg assembly 2. Because the swing arm motor 11 has a brake, the swing arm assembly 3 cannot be accidentally extended. The next blade is then controlled to switch to a vertical, tip-down maintenance position. The swing arm assembly 3 is then re-extended to a horizontal position, and the platform arm 5 is realigned to lie horizontally along the blade's side.

[0056] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A tower platform device for wind turbine blade lightning receptor maintenance, characterized by: The invention comprises a holding frame device (1) sleeved on the outer ring of a tower segment (7), a guide cylinder (4) being provided on the holding frame device (1), a support leg device (2) being provided in the guide cylinder (4), a flippable swing arm device (3) being provided on the support leg device (2), a platform arm (5) being provided at the end of the swing arm device (3), and the swing arm device (3) being flipped so that the platform arm (5) is close to the side of the wind turbine blade (8); The holding frame device (1) comprises a first half frame (101) and a second half frame (102) which are symmetrically arranged, and both ends of the first half frame (101) and the second half frame (102) are detachably connected to the guide cylinder (4); The supporting leg device (2) comprises a plurality of vertical racks (202) and transverse racks (203). The supporting leg device (2) is a hollow structure. A hinge seat (204) is provided in the supporting leg device (2). One end of the swing arm device (3) is hinged to the hinge seat (204). The swing arm device (3) can be stored in the supporting leg device (2). An opening portion (205) is provided on one side of the supporting leg device (2). A limit stop portion (207) is provided at the lower end of the opening portion (205). The swing arm device (3) is flipped out from the opening portion (205) and the lower end of the swing arm device (3) is pressed against the limit stop portion (207). A rotatable screw rod (208) is provided on one side of the supporting leg device (2), a lifting motor (209) is provided at one end of the screw rod (208), a nut seat (402) is provided on the outside of the guide cylinder (4), and the screw rod (208) is sleeved with the nut seat (402); The swing arm device (3) comprises a base section (301) and a telescopic section (302), the base section (301) and the telescopic section (302) being slidably sleeved, the end of the base section (301) being hinged to the hinge seat (204) so that the base section (301) can swing vertically, and the end of the telescopic section (302) being hinged to the platform arm (5) so that the platform arm (5) can rotate horizontally.

2. The tower platform device for wind turbine blade lightning receptor maintenance according to claim 1 is characterized in that: A reserved hole (701) is provided on the tower segment (7), and a plurality of connecting ears (103) are provided on the holding frame device (1) along the circumference. A slidable latch rod (104) is provided in the connecting ear (103), and one end of the latch rod (104) is inserted into the reserved hole (701).

3. The tower platform device for wind turbine blade lightning receptor maintenance according to claim 1 is characterized in that: Rotatable guide wheels (401) are provided at the upper and lower ends of the guide cylinder (4), and a plurality of vertical guide rails (201) are provided on the outer side of the support leg device (2), and each guide rail (201) abuts against each guide wheel (401).

4. The tower platform device for wind turbine blade lightning receptor maintenance according to claim 1 is characterized in that: Two guide cylinders (4) are symmetrically arranged, each guide cylinder (4) is provided with a support leg device (2), the platform arm (5) of each support leg device (2) is provided with a plurality of connecting rod mounting holes (502), a connecting rod (10) is provided between the two horizontally arranged platform arms (5), and the connecting rod (10) is inserted into each connecting rod mounting hole (502).

5. The tower platform device for wind turbine blade lightning receptor maintenance according to claim 1 is characterized in that: The hinged end of the base section (301) is provided with a swing arm shaft (303), the swing arm shaft (303) is sleeved with a first sprocket wheel (304), the side wall of the base section (301) on one side of the swing arm shaft (303) is provided with a first avoidance notch (305), the support leg device (2) is provided with a swing arm motor (11), the shaft end of the swing arm motor (11) is provided with a second sprocket wheel (1101), and a chain device (12) is further provided, the second sprocket wheel (1101) and the first sprocket wheel (304) are connected by a chain. The device (12) is driven; a second avoidance notch (306) is provided on the side surface of one end of the telescopic joint (302) close to the base joint (301); a driving cylinder mounting seat (307) is provided at the second avoidance notch (306) inside the base joint (301); a hinged linear driving cylinder (308) is provided at one end of the driving cylinder mounting seat (307); a driving cylinder connecting seat (309) is provided at the other end of the linear driving cylinder (308); and the driving cylinder connecting seat (309) is connected to the inner wall of the telescopic joint (302).

6. The tower platform device for wind turbine blade lightning receptor maintenance according to claim 5, characterized in that: The end of the telescopic joint (302) away from the base joint (301) is provided with a platform arm connecting shaft (310), one end of the platform arm (5) is provided with a shaft sleeve portion (503), the shaft sleeve portion (503) is rotatably sleeved with the platform arm connecting shaft (310), the platform arm connecting shaft (310) is provided with a plurality of through angle positioning holes (311) along the circumferential direction, the shaft sleeve portion (503) is provided with an angle positioning pin (504), and the angle positioning pin (504) is inserted into the angle positioning hole (311).

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