Tower drum platform device for maintaining lightning arrester of fan blade

Abstract

The invention provides a tower drum platform device for maintenance of a lightning arrester of a fan blade, which comprises a holding frame device sleeved on the outer ring of a tower drum section, a guide cylinder is arranged on the holding frame device, a supporting leg device is arranged in the guide cylinder, a turnover swing arm device is arranged on the supporting leg device, a platform arm is arranged at the end part of the swing arm device, and the platform arm is connected with the guide cylinder. The swing arm device turns over to enable the platform arm to be close to the side face of the fan blade, and the problems that the wind driven generator blade lightning arrester is difficult to maintain and poor in safety are solved.

Description

Technical Field

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

[0002] Wind turbines are usually located in open highlands or sea areas. Due to their high height and the absence of other objects around them, they are easily struck by lightning, which may cause the blade surface to be charred, perforated, or even broken. Existing lightning protection measures usually arrange a lightning receptor at the top of the sleeve, the tip of the blade, and the surface of both sides of the blade at intervals along the length direction. The lightning receptors are connected together through cables and connected to the ground through leads.

[0003] Lightning rods need to be tested regularly, and damaged ones need to be replaced in time. Since there is usually an elevator inside the sleeve, the lightning rod at the top is easier to replace, but the blades are suspended outside and the inside is closed and cannot be reached. The traditional way is to transfer the staff to the vicinity of the blade lightning rod through lifting equipment such as cranes and ladders for replacement and maintenance. This method not only occupies the lifting equipment for a long time, but is also prone to shaking, and the safety of the staff cannot be guaranteed. Summary of the invention

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

[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 arresters, including a bracket device sleeved on the outer ring of the tower segment, the bracket 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 circumferential direction, 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 which are symmetrically arranged, and both ends of the first half frame and the second half frame are detachably connected to the guide tube.

[0008] In the preferred scheme, the supporting leg device includes multiple vertical frame rods and horizontal frame rods. The supporting leg device has a hollow structure. A hinge seat is provided in the supporting leg device. One end of the swing arm device is hinged to the hinge seat. The swing arm device can be stored in 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 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 supporting 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 outer side of the guide cylinder, and the screw rod is sleeved with the nut seat.

[0011] In a preferred embodiment, 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 embodiment, two guide cylinders are symmetrically arranged, each guide cylinder is provided with a supporting leg device, the platform arm of each supporting leg device is provided with a plurality of 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 scheme, a swing arm shaft is provided at the hinged end of the base section, a first sprocket wheel is sleeved 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, and the second sprocket and the first sprocket wheel are driven by the chain device; a second avoidance gap is provided on the side surface 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 joint, 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 bracket device is fixed to the outer wall of the wind turbine tower, and the connection is relatively stable. A relatively short platform arm is extended outward as the basic structure, which is convenient for external installation of an operating platform and a guardrail structure, and personnel safety is greatly improved; the bracket device adopts a splicable design and can be quickly installed on site after being prefabricated in the factory; 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 bracket device, the maintenance of lightning arresters 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 arresters 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 in conjunction with the accompanying drawings and embodiments.

[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 double platform arms of the present invention arranged side by side and connected.

[0020] Figure 4 It is a top view of the spacing arrangement of the double 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 a 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] Fig. 9 It is a schematic diagram of the driving structure of the swing arm device of the present invention.

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

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

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

[0029] like Figure 1-11 In the present invention, a tower platform device for wind turbine blade lightning arrester maintenance includes a bracket device 1 sleeved on the outer ring of a tower segment 7, a guide cylinder 4 is provided on the bracket 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, the platform arm 5 approaches horizontality. The platform arm 5 has a certain width for personnel 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. Personnel maintain and disassemble the lightning arresters 9 at the tip and both sides of the wind turbine blades 8 on the operating platform 6.

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

[0032] In a preferred solution, a reserved hole 701 is provided on the tower segment 7 , and a plurality of connecting ears 103 are circumferentially provided on the bracket 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 from top to bottom. When the tower segments 7 are processed in the factory, a reserved hole 701 corresponding to the connection ear 103 of the bracket device 1 is pre-processed on each tower segment 7. The bracket device 1 can be hoisted by a crane or lifted up to the tower segments 7 at different heights by a jacking device, and the bracket device 1 is connected and fixed to the tower segments 7.

[0034] The upper and lower ends of the holding frame device 1 are provided with a plurality of connecting ears 103, and a through hole is provided in the connecting ear 103. The reserved hole 701 can be a threaded hole, and 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. After each connecting ear 103 is screwed into each reserved hole 701 , the first nut 105 at the reserved hole 701 is locked, and then the second nuts 106 on both sides of the connecting ear 103 on the latch rod 104 are locked, and the bracket device 1 is then fixed on the tower segment 7 .

[0035] 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.

[0036] The first half frame 101 and the second half frame 102 are U-shaped, V-shaped or semicircular, with mounting flanges at the ends, bolts on the mounting flanges, and bolt holes on the side walls of the guide cylinder 4 that can be connected to the mounting flanges of the first half frame 101 and the second half frame 102.

[0037] In the preferred embodiment, the supporting leg device 2 includes a plurality of vertical frame rods 202 and a horizontal frame 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 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 against the limit stop portion 207.

[0038] 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.

[0039] 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 .

[0040] 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 two horizontal directions.

[0041] 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 outer side of the guide cylinder 4, and the screw rod 208 is sleeved with the nut seat 402.

[0042] The support leg device 2 and the guide cylinder 4 are pre-connected on the ground, the first half frame 101 and the second half frame 102 are assembled together at the ground section of the tower column, and the ends are installed on the outer wall of the guide cylinder 4. The closed structure is connected to the outside of the tower column, and then hoisted to a predetermined height to fix the frame device 1 and the tower segment 7. Due to the reverse self-locking characteristics of the screw rod, it can be ensured that the support leg device 2 will not fall naturally.

[0043] 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.

[0044] After the base section 301 is swung down, the platform arm 5 is rotated to a right angle and horizontally extends to the side of the wind turbine blade 8. The telescopic section 302 can be extended to adjust the distance between the platform arm 5 and the wind turbine blade 8 to adapt to different wind turbine blade pitch specifications. The platform arm 5 can be adjusted to the inside or outside of the wind turbine blade 8, which is convenient for maintaining the lightning arrester 9 on the inside and outside of the wind turbine blade 8.

[0045] In the preferred embodiment, two guide cylinders 4 are symmetrically arranged relative to the center axis of the tower, each guide cylinder 4 is provided with a supporting leg device 2, the platform arm 5 of each supporting leg device 2 is provided with a plurality of connecting rod mounting holes 502, and 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.

[0046] 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 staff.

[0047] The two platform arms 5 can be arranged at intervals, with the interval 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 arresters 9 at each height one by one.

[0048] 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.

[0049] When the base section 301 is swung out horizontally, the first avoidance gap 305 is below the swing arm shaft 303 to avoid the path of the chain device 12. When the base section 301 is retracted, since the end of the base section 301 is not closed, it will not interfere with the chain device 12. The swing arm motor 11 is installed on the fixed plate in 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, the telescopic section 302 and the platform arm 5 are all hollow square tube structures, the weight is not large, and the swing arm motor 11 adopts a reduction motor to meet the driving force requirements.

[0050] 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 .

[0051] The driving structure is installed in the inner cavity of the base joint 301 and the telescopic joint 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.

[0052] 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. The platform arm connecting shaft 310 is provided with a plurality of through angle positioning holes 311 along the circumferential direction, and 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.

[0053] The shaft sleeve part 503 can be a screw rod. Since the platform arm 5 swings laterally, the force driving the swing is not large, and the horizontal angle can be adjusted manually, and the angle can be fixed by the angle positioning pin 504 and finally locked by a nut.

[0054] After the lightning arrester 9 of a single blade is maintained, the staff adjusts the platform arm 5 to be in a straight line with the base section 301, and then moves to the temporary platform 13. The telescopic section 302 is retracted into the base section 301, and the swing arm device 3 is swung back into the support leg device 2. Since the swing arm motor 11 is equipped with a brake, the swing arm device 3 will not swing out by mistake. The next blade is controlled to switch to the vertical maintenance position with the tip downward, the swing arm device 3 is swung out again to the horizontal, and the platform arm 5 is readjusted to be horizontal to the side of the blade.

[0055] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A tower platform device for wind turbine blade lightning arrester maintenance, characterized by: The invention comprises a frame device (1) sleeved on the outer ring of a tower segment (7), the frame device (1) being provided with a guide cylinder (4), a support leg device (2) being provided inside 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 a wind turbine blade (8).

2. The tower platform device for wind turbine blade lightning arrester maintenance according to claim 1 is characterized in that: A reserved hole (701) is provided on the tower segment (7), a plurality of connection ears (103) are provided on the bracket device (1) along the circumferential direction, a slidable latch rod (104) is provided in the connection 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 arrester maintenance according to claim 2 is characterized in that: 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 tube (4).

4. The tower platform device for wind turbine blade lightning arrester maintenance according to claim 1 is characterized in that: 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 abutted against the limit stop portion (207).

5. The tower platform device for wind turbine blade lightning arrester 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).

6. The tower platform device for wind turbine blade lightning arrester maintenance according to claim 5 is characterized in that: 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 outer side of the guide cylinder (4), and the screw rod (208) is sleeved with the nut seat (402).

7. The tower platform device for wind turbine blade lightning arrester maintenance according to claim 4 is characterized in that: 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 a hinge seat (204) so ​​that the base section (301) can swing vertically, and the end of the telescopic section (302) being hinged to a platform arm (5) so that the platform arm (5) can rotate horizontally.

8. The tower platform device for wind turbine blade lightning arrester maintenance according to claim 7 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).

9. The tower platform device for wind turbine blade lightning arrester maintenance according to claim 7, characterized in that: 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 notch (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 support leg device (2), a second sprocket wheel (1101) is provided at the shaft end of the swing arm motor (11), 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 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).

10. The tower platform device for wind turbine blade lightning arrester maintenance according to claim 9, 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; 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).

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