An external platform at the bottom of a wind turbine tower

Abstract

The present invention discloses an outer platform at the bottom of a wind turbine tower, which includes a platform pedal, a pedal skeleton, a support member and a platform support device with adjustable height. The support member is fixedly arranged on the outer wall of the wind turbine tower, the pedal skeleton is fixedly arranged above the support member, the platform pedal is fixedly arranged on the pedal skeleton, and the support device is fixedly connected to the side of the pedal skeleton away from the wind turbine tower and is arranged below the pedal skeleton; the platform pedal is an annular pedal formed by splicing a plurality of platform plates. The present invention solves the problem of the standing point of personnel when tightening the outer ring bolts of the T-shaped flange, and at the same time can ensure the necessary safety of personnel when tightening flange bolts and performing maintenance work on the platform; adopting a modular design, the outer platform is assembled by splicing a plurality of small parts, and each part is small in volume and light in weight, and can be installed without mechanical equipment at the tower hoisting site.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to an outer platform at the bottom of a wind turbine tower. Background Art

[0002] Generally, an L-shaped flange connection is adopted between two sections of the existing tower. The flange bolts are located inside the tower. Generally, only the inner platform of the tower can provide a standing point and a tool placement position for tightening the flange bolts of the connecting flange and during maintenance work. However, in some special wind farms, due to large bottom loads or an overly large distribution circle of foundation anchor bolts, etc., a T-shaped flange is required to connect the transition section and the tower barrel at the bottom. Generally, this T-shaped flange is 3 to 6 meters above the ground. The original inner platform of the tower cannot provide a standing point and a tool placement position required for tightening the outer flange bolts of the T-shaped flange and during maintenance. Therefore, it is necessary to design a platform that can provide a standing point and a tool placement position required for tightening the outer flange bolts located outside the tower and during maintenance. Summary of the Invention

[0003] The present invention is to overcome the deficiencies of the prior art and provides an outer platform at the bottom of a wind turbine tower. The outer platform is located outside the tower of the wind turbine and can provide a standing point and a tool placement position required for tightening the outer flange bolts located outside the tower and during maintenance.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An outer platform at the bottom of a wind turbine tower includes platform pedals, a pedal skeleton, support members, and a platform support device with adjustable height. The support members are fixedly arranged on the outer wall of the wind turbine tower. The pedal skeleton is fixedly arranged above the support members. The platform pedals are fixedly arranged on the pedal skeleton. The support device is fixedly connected to the side of the pedal skeleton away from the wind turbine tower and is arranged below the pedal skeleton. The platform pedals are annular pedals formed by splicing multiple platform plates. The pedal skeleton includes multiple skeletons, and each adjacent pair of skeletons is respectively fixedly connected to the same support member and the same support device.

[0006] The support members and the support device jointly support the pedal skeleton. The platform pedals laid on the pedal skeleton are used to provide a standing point and a tool placement position required for maintenance. The height of the support device is adjustable to adapt to different uneven terrains, ensure the levelness of the outer platform, and guarantee the safety of maintenance personnel during use. The platform pedals are formed by splicing multiple platform plates, which is convenient for assembling the outer platform without the need to use large lifting tools. Each adjacent pair of skeletons adopts unified support, so that the force of the block skeleton is distributed on two support devices, reducing the force on a single support device and improving the stability of the outer platform.

[0007] Preferably, the support device includes a support column and an adjustment base. The support column includes an upper end plate, a lower end plate, and a vertical rod with an H-shaped cross-section. The adjustment base includes a threaded rod and a base plate fixedly connected to the threaded rod. The threaded rod is threadedly connected to the lower end plate, and a nut for restricting the movement of the adjustment base is also provided on the threaded rod. The nuts are respectively located on the upper and lower end faces of the lower end plate. By adjusting the length of the threaded rod screwed into the support column, the height of the support device can be adjusted to adapt to different uneven terrains, ensuring the levelness of the outer platform and guaranteeing the safety of maintenance personnel during use. The nut located above the lower end plate plays a role in preventing loosening, and the nut located below the lower short plate plays a role in clamping.

[0008] Preferably, the outer platform at the bottom of the wind turbine tower also includes a plurality of guardrails, which are fixedly arranged at the outer edge of the platform tread. The guardrails play a role in protecting maintenance personnel and preventing them from falling from the outer platform.

[0009] Preferably, the support member includes two side plates, a reinforcing plate, and a mounting plate for mounting the framework. The side plates are welded to the outer wall of the wind turbine tower, and there is a notch on the side where the side plates are welded to the wind turbine tower. The two ends of the reinforcing plate are respectively fixedly connected to the two side plates, and the side of the reinforcing plate is fixedly connected to the lower end face of the mounting plate. The mounting plate is provided with an oval-shaped through hole, and the mounting plate and the framework are connected by bolts. The oval-shaped through hole reduces the influence of the dimensional tolerance of the framework on the installation; the notch prevents the continuous weld between the support member and the wind turbine tower from being too long and causing weld cracks.

[0010] Preferably, the platform plate is fan-shaped, the framework is isosceles trapezoidal, and a reinforcing member is connected between the upper and lower bottom edges of the isosceles trapezoidal framework. The two side edges of the fan-shaped platform plate are arranged on the two inclined sides of the isosceles trapezoidal framework.

[0011] Preferably, the number of platform plates is 12, each platform plate is correspondingly arranged on a framework, and each platform plate is provided with a guardrail. The multiple platform plates are spliced to form the platform tread, which is convenient for assembly; each platform plate is arranged on a framework, reducing the installation error.

[0012] Preferably, the platform plate is provided with anti-slip patterns.

[0013] Preferably, a fixed pipe for improving the stability of the support device is fixedly connected between every two adjacent support columns.

[0014] Preferably, the platform plate and the framework, the guardrail and the platform plate, the framework and the support member, the framework and the support device, and the fixed pipe and the support column are all connected by bolts.

[0015] Therefore, the present invention has the following beneficial effects: It solves the problem of the standing point of personnel when tightening the outer ring bolts of the T-shaped flange about 3 to 6 meters above the tower bottom foundation, and at the same time can ensure the necessary safety of personnel when tightening and maintaining the flange bolts on the platform; Adopting a modular design, the outer platform is assembled by splicing multiple small components. Each component is small in size and light in weight, and can be installed without mechanical equipment at the tower hoisting site. At the same time, no mechanical equipment is required for demolition, and only manual demolition is needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a perspective view of the present invention;

[0017] Figure 2 is a schematic structural diagram of a front view of the present invention;

[0018] Figure 3 is a schematic structural diagram of a support device of the present invention;

[0019] Figure 4 is a schematic structural diagram of a support member of the present invention;

[0020] Figure 5 is a schematic structural diagram of a framework of the present invention.

[0021] In the figure: 1, platform plate; 2, framework; 3, support device; 3-1, upper end plate; 3-2, vertical rod; 3-3, lower end plate; 3-4, threaded rod; 3-5, base plate; 3-6, nut; 4, fixed pipe; 5, guardrail; 6, support member; 6-1, mounting plate; 6-2, side plate; 6-3, reinforcing plate; 6-4, waist-shaped through hole. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following further describes the present invention in conjunction with the drawings and specific embodiments.

[0023] In Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5In the illustrated embodiment, an outer platform at the bottom of a wind turbine tower of the present invention includes a platform tread, a tread skeleton, a support member, and a platform support device with adjustable height. The support member is fixedly arranged on the outer wall of the wind turbine tower. The tread skeleton is fixedly arranged above the support member through bolt connection. The platform tread is fixedly arranged on the tread skeleton through bolt connection. The support device is fixedly connected to the side of the tread skeleton away from the wind turbine tower and is arranged below the tread skeleton. The platform tread is an annular tread formed by splicing 12 sector-shaped platform plates 1. The tread skeleton includes 12 skeletons 2, and every two adjacent skeletons are respectively fixedly connected to the same support member 6 and the same support device 3. Each platform plate is correspondingly arranged on one skeleton.

[0024] The support device includes a support column and an adjustment seat. The support column includes an upper end plate 3-1, a lower end plate 3-3, and a vertical rod 3-2 with an H-shaped cross-section. The vertical rod is an H-shaped steel. The adjustment seat includes a threaded rod 3-4 and a base plate 3-5 fixedly connected to the threaded rod. The threaded rod is in threaded connection with the lower end plate. A nut 3-6 for restricting the movement of the adjustment seat is also arranged on the threaded rod. The nuts are respectively located on the upper and lower end faces of the lower end plate. When the nut located above the lower end plate is tightened, the nut presses against the upper end face of the lower end plate to prevent loosening. When the nut located below the lower end plate is tightened, the nut presses against the lower end face of the lower end plate to play a clamping role. By tightening the upper and lower two nuts, the position of the threaded rod is fixed. During adjustment, only need to loosen the upper and lower two nuts and rotate the threaded rod to realize the up and down adjustment of the threaded rod.

[0025] The outer platform at the bottom of the wind turbine tower further includes 12 guardrails 5, and the guardrails are fixedly arranged on the outer edge of the platform tread. A bottom plate is welded to the bottom of the guardrail, and the bottom plate is connected to the platform plate through bolts. There are 6 connection points between a single guardrail and the platform plate, and a single guardrail is fixed on the outer edge of a single platform plate.

[0026] The support member includes two side plates 6-2, a reinforcing plate 6-3, and a mounting plate 6-1 for mounting the skeleton. The side plates are welded to the outer wall of the wind turbine tower. A notch is provided on the side of the side plate welded to the wind turbine tower. The two ends of the reinforcing plate are respectively fixedly connected to the two side plates. The side of the reinforcing plate is fixedly connected to the lower end face of the mounting plate. Two waist-shaped through holes 6-4 are provided on the mounting plate, and the mounting plate and the skeleton are connected through bolts. The two waist-shaped through holes on the mounting plate are respectively fixedly connected to the two skeletons.

[0027] The skeleton is composed of channel steel welded together. The skeleton is in an isosceles trapezoid shape. A reinforcing member is connected between the upper and lower bottom edges of the isosceles trapezoid-shaped skeleton. The two side edges of the sector-shaped platform plate are arranged on the two inclined sides of the isosceles trapezoid-shaped skeleton.

[0028] Anti-slip patterns are provided on the platform plate. The platform plate is made of patterned plate.

[0029] A fixing pipe 4 for improving the stability of the support device is fixedly connected between every two adjacent support columns. A connecting plate is welded to the middle of the support column. A circular through hole is provided on the connecting plate. Fixing plates are provided at both ends of the fixing pipe. Oval through holes are provided on the fixing plates. The fixing pipe and the support column are fixed by bolts passing through the oval through holes and the circular through hole.

[0030] The present invention solves the problem of the standing point of personnel when tightening the outer ring bolts of the T-shaped flange about 3 to 6 meters above the tower bottom foundation. At the same time, it can ensure the necessary safety of personnel when tightening and maintaining the flange bolts on the platform; adopting a modular design, the outer platform is assembled by splicing multiple small parts. Each part is small in size and light in weight, and can be installed without mechanical equipment at the tower crane hoisting site. At the same time, no mechanical equipment is required for demolition, and only manual demolition is needed.

Claims

1. An outer platform at the bottom of a wind turbine tower, characterized in that, It includes a platform pedal, a pedal skeleton, a support member, and a platform support device with adjustable height. The support member is fixedly arranged on the outer wall of the wind turbine tower. The pedal skeleton is fixedly arranged above the support member. The platform pedal is fixedly arranged on the pedal skeleton. The support device is fixedly connected to the side of the pedal skeleton away from the wind turbine tower and is arranged below the pedal skeleton. The platform pedal is an annular pedal formed by splicing multiple platform plates. The pedal skeleton includes multiple skeletons, and every two adjacent skeletons are respectively fixedly connected to the same support member and the same support device. The support device includes a support column and an adjustment seat. The support column includes an upper end plate, a lower end plate, and a vertical rod with an H-shaped cross-section. The adjustment seat includes a threaded rod and a base plate fixedly connected to the threaded rod. The threaded rod is threadedly connected to the lower end plate. A nut for restricting the movement of the adjustment seat is also provided on the threaded rod, and the nut is respectively located on the upper and lower end faces of the lower end plate. The support member includes several side plates. There are notches on the side where the side plates are welded to the outer wall of the wind turbine tower. The two ends of the reinforcing plate are respectively fixedly connected to the side plates. The side of the reinforcing plate is fixedly connected to the lower end face of the mounting plate. There are oval through holes on the mounting plate connected to the skeleton.

2. The outer platform at the bottom of the fan tower according to claim 1, characterized in that, The outer platform at the bottom of the wind turbine tower further includes multiple guardrails, and the guardrails are fixedly arranged on the outer edge of the platform pedal.

3. The outer platform at the bottom of a wind turbine tower according to claim 1, characterized in that, The support member includes two side plates, a reinforcing plate, and a mounting plate for installing the skeleton. The side plates are welded to the outer wall of the wind turbine tower. There are notches on the side where the side plates are welded to the wind turbine tower. The two ends of the reinforcing plate are respectively fixedly connected to the two side plates. There are oval through holes on the mounting plate, and the mounting plate and the skeleton are connected by bolts.

4. The outer platform at the bottom of a wind turbine tower according to claim 1, characterized in that, The platform plate is fan-shaped, and the skeleton is isosceles trapezoidal. A reinforcing member is connected between the upper and lower bottom edges of the isosceles trapezoidal skeleton. The two side edges of the fan-shaped platform plate are arranged on the two inclined sides of the isosceles trapezoidal skeleton.

5. The outer platform at the bottom of a wind turbine tower according to claim 2, characterized in that The number of the platform plates is 12. Each platform plate is correspondingly arranged on one skeleton, and there is a guardrail on each platform plate.

6. The outer platform at the bottom of a wind turbine tower according to claim 5, characterized in that The platform plate is provided with anti-slip patterns.

7. The external platform at the bottom of a wind turbine tower according to claim 1, characterized in that, A fixed pipe for improving the stability of the support device is fixedly connected between every two adjacent support columns.

8. A bottom outer platform of a wind turbine tower according to any one of claims 1-7, characterized in that, The platform plate and the skeleton, the guardrail and the platform plate, the skeleton and the support member, the skeleton and the support device, and the fixed pipe and the support column are all connected by bolts.

Images