A Cone Shaped Pin for Tower Wall Attachment

Abstract

A cone shaped pin (16) for tower wall attachment is disclosed. The pin comprises a cone (22) with a first head (23) and a second head (24), the first head is larger than the second head. The pin further comprises an internal hole (18a) which is at least accessible from the second head. A system (15) for tower wall attachment and a method for mounting the system are also disclosed. In the case of using the system comprising the pin, tower wall attachment is better and safer than that in the art, and welding is avoid, thus greatly simplifies the process of fixing and improves the performance of the tower.

Claims

1. A cone shaped pin for tower wall attachment, wherein the cone shaped pin comprises a cone with a first head and a second head, where the first head is larger than the second head and where the cone shaped pin further comprises an internal hole, where the hole at least is accessible from the second head.

2. A cone shaped pin according to claim 1, wherein the internal hole comprises a thread.

3. A cone shaped pin according to claim 1, wherein the cone comprises a gradient of 1:5-1:20, preferably 1:10.

4. A cone shaped pin according to claim 1, wherein the first head comprises an external diameter of Φ20 mm-Φ30 mm, preferably Φ26 mm.

5. A cone shaped pin according to claim 1, wherein the internal thread is M10-M20, preferably M12.

6. A cone shaped pin according to claim 1, wherein the material of the cone is stainless steel.

7. System for wall attachment comprising a cone shaped pin according to claim 1, wherein the system further comprises at least a bolt and a sleeve with a through hole, where the bolt through the sleeve is connected to the cone shaped pin for fastening a bracket for the tower internals, such as ladders, cables, platforms, etc.

8. Method for mounting the system according to claim 7 in a tower wall, wherein the method at least comprises the following steps: Drilling a hole and machining allowance of one side Bearizing using a mould milling cutter Reaming using a reamer Inserting the second head of the cone shaped pin in the largest side of the hole Connecting a bolt through a sleeve to the thread in the cone shaped pin from the other side of the hole.

9. Use of a system according to claim 7 for tower wall attachment, wherein the tower is a wind turbine tower.

Description

DESCRIPTION OF THE DRAWING

[0031] The invention will be described in further detail below by means of non-limiting embodiments with reference to the drawing, in which:

[0032] FIG. 1 shows an exemplary embodiment of a wind turbine;

[0033] FIG. 2 shows an exemplary embodiment of a wall attachment used inside a tower;

[0034] FIG. 3 shows an exemplary embodiment of the system for wall attachment, comprising a cone shaped pin;

[0035] In the drawings, the following reference numerals have been used for the designations used in the detailed part of the description: [0036] 1 Wind turbine [0037] 2 Ground level [0038] 3 Foundation [0039] 4 Wind turbine tower [0040] 5 Nacelle [0041] 6 Rotor hub [0042] 7 Wind turbine blades [0043] 8 Tip end [0044] 9 Blade root [0045] 10 Inside, tower [0046] 11 Tower wall attachment [0047] 12 Bracket/Internal accessory [0048] 13 Ladder [0049] 14 Pipe-/cable bearing [0050] 15 System [0051] 16 Cone shaped pin [0052] 17 Tower wall [0053] 18a Internal hole [0054] 18b thread [0055] 19 Bolt [0056] 20 Sleeve [0057] 21 Cone shaped hole [0058] 22 Cone [0059] 23 First head [0060] 24 Second head [0061] 25 Through hole

DETAILED DESCRIPTION OF THE INVENTION

[0062] FIG. 1 shows an exemplary embodiment of a wind turbine 1 arranged relative to a ground level 2. The wind turbine 1 comprises a wind turbine tower 4 having a top end and a bottom end facing away from the top end. The bottom end is configured for mounting to a mounting end of a foundation 3. The wind turbine tower 4 may comprise two, three or more tower sections (not shown) that are mounted together to form the wind turbine tower 4. A nacelle 5 is arranged at the top of the wind turbine tower 4 and is rotatable connected to the wind turbine tower 4, e.g. via a yaw mechanism (not shown). A rotor having a rotor hub 6 is rotatable connected to the nacelle 5, e.g. via a bearing assembly between the rotor hub 6 and the main frame structure of the nacelle 5. Two or more wind turbine blades 7 (three wind turbine blades are shown), are connected to the rotor hub 6, e.g. via one or more pitch mechanisms (not shown). The wind turbine blades 7 extend outwards from the centre of the rotor hub 6 to form a plane of rotation where each blade 7 comprises a tip end 8 and a blade root 9.

[0063] FIG. 2 shows an exemplary embodiment of a wall attachment 11 used at the inside 10 of a tower 4, to fasten a bracket 12 for various internal accessories, here shown as a ladder 13 and pipe-/cable bearings 14 to the tower 4.

[0064] FIG. 3 shows an exemplary embodiment of a system 15 for wall attachment and the principle of fixing internal accessories 12, 13, 14 by means of a cone shaped pin 16. The cone shaped pin 16 is embedded in the tower wall 17 and the shown cone shaped pin 16 has an internal hole 18a and a thread 18b in the core. The shown bolt 19 and sleeve 20 are then used to fix the internal accessories/bracket 12 on the tower wall 17.

[0065] Firstly, a cone shaped hole 21 is processed in the tower wall 17. Then a corresponding cone shaped pin 16 is embedded into the cone shaped hole 21 in the tower wall 17.

[0066] The first head 23 is larger than the second head 24 and the first head 23 of the cone shaped pin 16 is in the direction of the outside of the tower wall 17 and the second head 24 is in the direction of the inside 10 of the tower 4. So a force with the direction from the outside to the inside can firmly fix the cone shaped pin 16 to the tower wall 17. The internal hole 18a and the thread 18b in the core of the cone shaped pin 16 combined with bolts 19 and sleeves 20 can firmly fix internal accessories/bracket 12 to the tower wall 17 without any welding.

[0067] The cone shaped pin 16 comprises a cone 22 with a first head 23 and a second head 24, where the first head 23 is larger than the second head 24 and where the cone shaped pin 16 further comprises an internal hole 18a, where the hole 18a is at least accessible from the second head 24. The cone shaped pin 16 has an internal hole 18a comprising a thread 18b; where the cone 22 comprises a gradient of 1:5-1:20, preferably 1:10; where the first head 23 comprises an external diameter of ϕ20 mm-ϕ30 mm, preferably ϕ26 mm; the thread 18b is M10-M20, preferably M12 and where the material of the cone is stainless steel.

[0068] The system 15 further comprises at least a bolt 19 and a sleeve 20 with a through hole 25, where the bolt 19 through the sleeve 20 is connected to the cone shaped pin 16 for fastening a bracket 12 for the tower internals, such as ladders, cables, platforms etc.