Method for installing wind driven generator tower without modification

Abstract

The invention discloses a transformation-free wind driven generator tower mounting method which comprises the following steps: S1, fixedly mounting first guide pieces on the inner sides of a plurality of groups of annularly distributed screw rods, controlling a bottom port of a tower to be aligned with the first guide pieces by using a crane, and primarily positioning the tower; and S2, a second guide piece is fixedly installed at the top end of the screw, the crane is used for controlling the tower drum to be further lowered, and the tower drum is accurately positioned. According to the method, the first guiding piece is designed, the tower drum is preliminarily positioned, then the second guiding piece is fixedly installed at the top end of the screw rod, and the tower drum is accurately positioned, through the two-step positioning, installation of the tower drum can be efficiently and stably completed, the flange of the tower drum does not need to be transformed, and therefore the influence of transformation on the tower drum is completely avoided.

Description

Technical Field

[0001] The invention relates to the technical field of wind power equipment installation, and in particular to a method for installing a wind power generator tower without requiring modification. Background Art

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives the rotor to rotate and ultimately outputs alternating current. A wind turbine generally includes structures such as a wind wheel, a generator, a rectifier, and a tower. The tower of a wind power generation equipment is an important component of a wind turbine generator set. It plays a role in supporting the entire wind turbine generator set. The design and manufacturing quality of the tower directly affects the stability and service life of the wind turbine generator set.

[0003] Generally, the bottom of the tower of a wind turbine generator set is connected to the foundation by a flange structure. In order to ensure the stability of the connection structure, a relatively large number of screws are used around the flange, which makes the tower installation very delicate. However, it is difficult to achieve high-precision control of the tower by a crane. In some methods, the tower is modified, and a guide structure is fixed at the bottom of the tower. After installation, the tower is cut and removed. This method will affect the structural strength of the wind turbine tower. For this reason, the present invention provides a method for installing a wind turbine tower without modification. Summary of the invention

[0004] In order to solve the above shortcomings and deficiencies of the prior art, an object of the present invention is to provide a method for installing a wind turbine tower without requiring any modification.

[0005] The technical solution of the present invention is: A method for installing a wind turbine tower without modification is used for installing a tower and a foundation, wherein a plurality of groups of screws distributed in an annular manner are fixedly connected to the foundation, a flange is fixedly connected to the bottom of the tower, and a through hole corresponding to the screw is opened at the end of the flange, comprising the following steps: S1. A first guide is fixedly installed on the inner side of a plurality of groups of screw rods distributed in an annular shape, a crane is used to control the bottom port of the tower to align with the first guide, and the tower is gradually lowered so that the top end of the first guide is inserted into the interior of the tower from the bottom port of the tower, and the top end of the first guide is against the inner side of the tower, thereby achieving preliminary positioning of the tower; S2. A second guide is fixedly installed on the top of the screw rod, a crane is used to control the tower to be further lowered, and a pull rope is used manually to control the position of the tower so that the through hole is aligned with the top of the second guide. The tower is continued to be lowered, and the top of the second guide is inserted into the inner side of the through hole, thereby accurately positioning the tower.

[0006] Preferably, the tower is a conical structure that is small at the top and large at the bottom, and a manhole is provided on the side of the tower.

[0007] Preferably, twenty screw rods are provided, and five groups of the first guide members and five groups of the second guide members are provided, and the five groups of the first guide members and the five groups of the second guide members are distributed in a ring array.

[0008] Preferably, the first guide member comprises: A first bracket member, wherein a first end of the first bracket member is fixedly mounted on the screw rod, and a first long hole is formed at a second end of the first bracket member; A second bracket member, wherein a first end of the second bracket member is fixedly mounted on the screw rod, a second elongated hole is formed at a second end of the second bracket member, and a screw rod connected to the first bracket member and a screw rod connected to the second bracket member are spaced apart from each other; A double-headed screw, the bottom end of which passes through the first long hole and the second long hole, and a nut is threadedly installed on the bottom end of the double-headed screw and is located below the first bracket member and the second bracket member; A second threaded sleeve, the bottom end of the second threaded sleeve is threadedly connected to the top end of the double-headed screw, and a second top cap is fixedly installed on the top end of the second threaded sleeve.

[0009] Preferably, the double-headed screw comprises: A cylinder, wherein the bottom end of the cylinder is fixedly connected with a first thread segment, and the top end of the cylinder is fixedly connected with a second thread segment.

[0010] Preferably, the second guide member comprises: A first set of cutting bases and a second set of cutting bases, wherein the first set of cutting bases and the second set of cutting bases are both semicircular bodies, and the first set of cutting bases and the second set of cutting bases are combined and sleeved on the screw rod; A first threaded sleeve, a first sleeve cutting base and a second sleeve cutting base are combined to form a threaded connection part, the bottom end of the first threaded sleeve is threadedly connected to the threaded connection part, and a first top cap is fixedly installed on the top end of the first threaded sleeve.

[0011] Preferably, the first set of cutting bases and the second set of cutting bases have the same structure; The first set of cutting bases includes: A semi-straight section, the top end of which is fixedly connected to a semi-conical portion, and the top end of which is fixedly connected to a semi-threaded portion; The center of the semi-straight cylinder section is provided with a central hole, and the bottom end of the semi-conical portion is provided with a slit, and the diameter of the arc corresponding to the slit is the same as the diameter of the through hole.

[0012] Preferably, the method further comprises: installing positioning kits on a plurality of groups of screw rods distributed in an annular shape when pouring the foundation; The positioning kit is a thickened disc-shaped piece with the same size as the flange, and a plurality of positioning holes are opened on the thickened disc-shaped piece.

[0013] Preferably, when a pull rope is used manually to control the tower position, one end of the pull rope is connected to the through hole.

[0014] The beneficial effects of the present invention are as follows: compared with the prior art, by designing a first guide member and installing it on the inner side of multiple groups of annularly distributed screw rods, the annular portion formed by the first guide member is smaller than the bottom port of the tower, and the installer can lower the tower more conveniently. The top end of the first guide member is against the inner side of the tower, so that the tower is initially positioned. Then, the second guide member is fixedly installed on the top end of the screw rod, and a crane is used to control the tower to be further lowered. A pull rope is manually used to control the position of the tower, so that the through hole is aligned with the top end of the second guide member, and the tower is continued to be lowered. The top end of the second guide member is inserted into the inner side of the through hole, so that the tower is accurately positioned. The two-step positioning can efficiently and stably complete the installation of the tower, and this method does not require the modification of the flange of the tower, thereby completely avoiding the impact of the modification on the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the present invention when it is installed; Figure 2 It is a three-dimensional schematic diagram of the base part of the present invention; Figure 3 An exploded view of a first guide member of the present invention; Figure 4 is an exploded view of the second guide member of the present invention; Figure 5 It is a three-dimensional schematic diagram of the sleeve cutting base of the present invention; Figure 6 It is a three-dimensional schematic diagram of the positioning kit of the present invention.

[0016] Legend: 1. Tower; 2. Foundation; 3. Flange; 4. Through hole; 5. Screw; 6. Second guide; 601. First sleeve cut base; 601a. ​​Semi-straight section; 601b. Semi-conical section; 601c. Semi-threaded section; 601d. Center hole; 601e. Slit; 602. Second sleeve cut base; 603. First threaded sleeve; 604. First top cap; 7. First guide; 701. First bracket; 701a. First long hole; 702. Second bracket; 702a. Second long hole; 703. Nut; 704. Double-start screw; 704a. First threaded section; 704b. Cylinder; 704c. Second threaded section; 705. Second threaded sleeve; 706. Second top cap; 8. Thickened disc-shaped member; 9. Positioning hole. DETAILED DESCRIPTION

[0017] The invention is further described below in conjunction with the accompanying drawings and specific embodiments: refer to Figures 1 to 6 A method for installing a wind turbine tower without modification is provided, which is used to install a tower 1 and a foundation 2, wherein a plurality of groups of screw rods 5 distributed in an annular shape are fixedly connected to the foundation 2, a flange 3 is fixedly connected to the bottom of the tower 1, and a through hole 4 corresponding to the screw rod 5 is opened at the end of the flange 3.

[0018] In order to install the tower 1 more stably, the number of screw rods 5 is designed to be 15-50, and the through holes 4 on the flange 3 also correspond to the screw rods 5 one by one. When installing the tower 1, it is necessary to align the screw rods 5 and the through holes 4. Generally, a crane is used in combination with manual dragging to control the movement of the tower 1. Therefore, completing the alignment of the screw rods 5 and the through holes 4 is a very difficult task, which is also the most time-consuming step in the installation of the tower 1. This embodiment provides the following wind turbine tower installation method that does not require any modification.

[0019] The method comprises the following steps: S1. A first guide member 7 is fixedly installed on the inner side of multiple groups of screw rods 5 distributed in a ring shape. There are multiple first guide members 7, and the multiple first guide members 7 form a ring smaller than the bottom port of the tower 1. A crane is used to control the bottom port of the tower 1 to align with the first guide member 7, and the tower 1 is gradually lowered so that the top end of the first guide member 7 is inserted into the interior of the tower 1 from the bottom port of the tower 1, that is, all the first guide members 7 are sleeved on the bottom port of the tower 1, and the top end of the first guide member 7 is against the inner side of the tower 1, so as to achieve preliminary positioning of the tower 1. Multiple first guide members 7 work synchronously, so that the tower 1 gradually tends to the aligned position during the lowering process.

[0020] S2. A second guide member 6 is fixedly installed on the top of the screw rod 5, and a crane is used to control the tower 1 to be further lowered. A pull rope is manually used to control the position of the tower 1 so that the through hole 4 is aligned with the top of the second guide member 6. Since the diameter of the second guide member 6 is smaller than the through hole 4 on the flange 3, and the number of the second guide members 6 is less than the number of the screw rods 5, the staff can easily complete the operation and continue to lower the tower 1. The top of the second guide member 6 is inserted into the inner side of the through hole 4, so as to accurately position the tower 1. That is, in the process of continuing to lower the tower 1, relying on the guiding effect of the second guide member 6, the through hole 4 on the flange 3 is perfectly mounted on the screw rod 5, and then the corresponding nut is threadedly installed on the screw rod 5 to complete the installation of the tower 1.

[0021] In one embodiment, the tower 1 is a conical structure that is small at the top and large at the bottom. The tower 1 with a conical structure has a lower center of gravity and is more stable after installation. The top end of the first guide member 7 rests on the conical inner side surface of the tower 1 to guide the tower 1 to be centered. A manhole is provided on the side of the tower 1 to facilitate people entering / exiting the interior of the tower 1.

[0022] In one embodiment, twenty screw rods 5 are provided, and five groups of first guide members 7 and five groups of second guide members 6 are provided, and the five groups of first guide members 7 and the five groups of second guide members 6 are distributed in a ring array.

[0023] like Figure 2 As shown in the figure, the twenty screw rods 5 are divided into five groups, each group has four screw rods 5, and each group of first guide members 7 and second guide members 6 needs to be installed with three corresponding ones, so that there is a screw rod 5 between the first guide members 7 and second guide members 6 of adjacent groups, and the through hole 4 on the flange 3 corresponding to the screw rod 5 that is not used for installing the first guide member 7 and the second guide 6 can be used to connect the pull rope.

[0024] In one embodiment, the first guide member 7 includes: a first bracket member 701 , a second bracket member 702 , a double-start screw 704 , a second threaded sleeve 705 and a second top cap 706 .

[0025] The first end of the first bracket member 701 is fixedly mounted on the screw rod 5, and a sleeve hole can be opened at the first end of the first bracket member 701, and the sleeve hole at the first end of the first bracket member 701 is sleeved on the screw rod 5, and then a nut is threadedly installed on the screw rod 5 to achieve the fixed installation of the first end of the first bracket member 701 and the screw rod 5. The second end of the first bracket member 701 is provided with a first long hole 701a, and the first end of the second bracket member 702 is fixedly mounted on the screw rod 5, and the second end of the second bracket member 702 is provided with a second long hole 702a. The screw rod 5 connected to the first bracket member 701 and the screw rod 5 connected to the second bracket member 702 are spaced apart and are located at the first bracket member 701. The screw 5 between the screw 5 connected to the bracket member 701 and the screw 5 connected to the second bracket member 702 can be used to install the second guide member 6. The bottom end of the double-headed screw 704 passes through the first long hole 701a and the second long hole 702a. The bottom end of the double-headed screw 704 is located below the first bracket member 701 and the second bracket member 702 and is threadedly installed with a nut 703. After the nut 703 is tightened, the first bracket member 701, the second bracket member 702 and the double-headed screw 704 are fixed together. The bottom end of the second threaded sleeve 705 is threadedly connected to the top end of the double-headed screw 704, and the top end of the second threaded sleeve 705 is fixedly installed with a second top cap 706.

[0026] The installed second threaded sleeve 705 is located on the inner side of multiple groups of screw rods 5 distributed in a ring shape. The second threaded sleeves 705 corresponding to the installed multiple first guide members 7 also form a ring shape. The second top cap 706 is designed to protect the top end of the second threaded sleeve 705 .

[0027] In one embodiment, the double-headed screw 704 includes: a cylinder 704b, a first threaded segment 704a, and a second threaded segment 704c; the bottom end of the cylinder 704b is fixedly connected to the first threaded segment 704a, and the top end of the cylinder 704b is fixedly connected to the second threaded segment 704c.

[0028] The diameter of the cylinder 704 b is the same as that of the second threaded sleeve 705 . The second threaded segment 704 c is threadedly matched with the second threaded sleeve 705 . The second threaded segment 704 c can be designed to be slightly longer, so as to facilitate adjustment of the top height of the second threaded sleeve 705 .

[0029] In one embodiment, the second guide member 6 includes: a first sleeve cutting base 601 , a second sleeve cutting base 602 , a first threaded sleeve 603 and a first top cap 604 .

[0030] The first sleeve cutting base 601 and the second sleeve cutting base 602 are both semicircular bodies. The first sleeve cutting base 601 and the second sleeve cutting base 602 are combined and sleeved on the screw rod 5. The first sleeve cutting base 601 and the second sleeve cutting base 602 are combined to form a threaded connection part. The bottom end of the first threaded sleeve 603 is threadedly connected to the threaded connection part. After the first threaded sleeve 603 is installed with the first sleeve cutting base 601 and the second sleeve cutting base 602, the first sleeve cutting base 601, the second sleeve cutting base 602 and the first threaded sleeve 603 can form a whole. The top of the first threaded sleeve 603 is fixedly installed with a first top cap 604, and the first top cap 604 is used to protect the top of the first threaded sleeve 603.

[0031] In one embodiment, the first cut base 601 has the same structure as the second cut base 602. The first cut base 601 is specifically described below, which includes: a semi-straight tube section 601a, the top of the semi-straight tube section 601a is fixedly connected to a semi-conical portion 601b, the top of the semi-conical portion 601b is fixedly connected to a semi-threaded portion 601c, the center of the semi-straight tube section 601a has a center hole 601d, and the bottom end of the semi-conical portion 601b is provided with a slit 601e, and the diameter of the arc corresponding to the slit 601e is the same as the diameter of the through hole 4.

[0032] The full circular hole corresponding to the center hole 601d matches the screw 5. After the above step S2, the tower 1 is continued to be lowered. Under the guidance of the semi-conical portion 601b (two semi-conical portions are matched to form a full-conical portion), the tower 1 can be further positioned. At this time, the through hole 4 is completely aligned with the screw 5. The tower 1 is continued to be lowered. The semi-conical portion 601b is cut off at the slit 601e of the semi-conical portion 601b. The lower half after cutting is not restricted by the first threaded sleeve 603 and can be removed toward both sides. The upper half after cutting can be taken out upward from the through hole 4.

[0033] In one embodiment, it also includes: when pouring the foundation 2, a positioning kit is installed on the multiple groups of annularly distributed screws 5, and the positioning kit is used to ensure the verticality of the multiple groups of annularly distributed screws 5 and the accuracy of the relative positions of the multiple groups of annularly distributed screws 5.

[0034] The positioning kit is a thickened disc-shaped member 8 having the same size as the flange 3 , and a plurality of positioning holes 9 are formed on the thickened disc-shaped member 8 .

[0035] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A method for installing a wind turbine tower without modification, for installing a tower (1) and a foundation (2), wherein a plurality of groups of screw rods (5) distributed in an annular shape are fixedly connected to the foundation (2), a flange (3) is fixedly connected to the bottom of the tower (1), and a through hole (4) corresponding to the screw rod (5) is opened at the end of the flange (3), characterized in that: The following steps are involved: S1. A first guide member (7) is fixedly installed on the inner side of a plurality of groups of screw rods (5) distributed in an annular shape, a crane is used to control the bottom port of the tower (1) to align with the first guide member (7), and the tower (1) is gradually lowered so that the top end of the first guide member (7) is inserted into the interior of the tower (1) from the bottom port of the tower (1), and the top end of the first guide member (7) is against the inner side of the tower (1), thereby achieving preliminary positioning of the tower (1); S2. A second guide member (6) is fixedly installed at the top end of the screw rod (5), and a crane is used to control the tower (1) to be further lowered. A pull rope is manually used to control the position of the tower (1) so that the through hole (4) is aligned with the top end of the second guide member (6). The tower (1) is further lowered, and the top end of the second guide member (6) is inserted into the inner side of the through hole (4), thereby accurately positioning the tower (1).

2. The method for installing a wind turbine tower without modification according to claim 1, characterized in that: The tower (1) is a conical structure that is small at the top and large at the bottom, and a manhole is provided on the side of the tower (1).

3. The method for installing a wind turbine tower without modification according to claim 1, characterized in that: Twenty screw rods (5) are provided, and five groups of the first guide members (7) and the second guide members (6) are provided, and the five groups of the first guide members (7) and the five groups of the second guide members (6) are distributed in a ring array.

4. The method for installing a wind turbine tower without modification according to claim 3 is characterized in that: The first guide member (7) comprises: A first bracket member (701), wherein a first end of the first bracket member (701) is fixedly mounted on the screw rod (5), and a first long hole (701a) is formed at a second end of the first bracket member (701); a second bracket member (702), wherein a first end of the second bracket member (702) is fixedly mounted on the screw rod (5), a second long hole (702a) is provided at a second end of the second bracket member (702), and the screw rod (5) connected to the first bracket member (701) and the screw rod (5) connected to the second bracket member (702) are arranged at intervals; A double-headed screw rod (704), the bottom end of which passes through the first long hole (701a) and the second long hole (702a), and a nut (703) is threadedly mounted on the bottom end of the double-headed screw rod (704) and located below the first bracket member (701) and the second bracket member (702); A second threaded sleeve (705), the bottom end of the second threaded sleeve (705) is threadedly connected to the top end of the double-headed screw (704), and a second top cap (706) is fixedly mounted on the top end of the second threaded sleeve (705).

5. The method for installing a wind turbine tower without modification according to claim 4 is characterized in that: The double-headed screw (704) comprises: A cylinder (704b), wherein the bottom end of the cylinder (704b) is fixedly connected to a first threaded section (704a), and the top end of the cylinder (704b) is fixedly connected to a second threaded section (704c).

6. The method for installing a wind turbine tower without modification according to claim 3, characterized in that: The second guide member (6) comprises: A first set of cutting bases (601) and a second set of cutting bases (602), wherein the first set of cutting bases (601) and the second set of cutting bases (602) are both semicircular bodies, and the first set of cutting bases (601) and the second set of cutting bases (602) are combined and sleeved on the screw rod (5); A first threaded sleeve (603), a first sleeve cutting base (601) and a second sleeve cutting base (602) are combined to form a threaded connection portion, the bottom end of the first threaded sleeve (603) is threadedly connected to the threaded connection portion, and a first top cap (604) is fixedly mounted on the top end of the first threaded sleeve (603).

7. The method for installing a wind turbine tower without modification according to claim 6, characterized in that: The first set of cutting bases (601) and the second set of cutting bases (602) have the same structure; The first set of cutting bases (601) comprises: A semi-straight section (601a), the top end of the semi-straight section (601a) being fixedly connected to a semi-conical portion (601b), and the top end of the semi-conical portion (601b) being fixedly connected to a semi-threaded portion (601c); The center of the semi-straight cylinder section (601a) is provided with a center hole (601d), and the bottom end of the semi-conical portion (601b) is provided with a slit (601e), and the diameter of the arc corresponding to the slit (601e) is the same as the diameter of the through hole (4).

8. The method for installing a wind turbine tower without modification according to claim 1, characterized in that: Also includes: When pouring the foundation (2), a positioning kit is installed on a plurality of groups of screw rods (5) distributed in an annular shape; The positioning kit is a thickened disc-shaped member (8) having the same size as the flange (3), and a plurality of positioning holes (9) are formed on the thickened disc-shaped member (8).

9. The method for installing a wind turbine tower without modification according to claim 1, characterized in that: When the position of the control tower (1) is manually adjusted by using a pull rope, one end of the pull rope is connected to the through hole (4).

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