Prestressed cable steering device for fan tower drum

Abstract

The utility model provides a fan tower drum prestressed cable steering device which comprises an arc-shaped slide way frame, a supporting piece and a bolt, a groove is formed in one side of the arc-shaped slide way frame, and a prestressed cable penetrates through the groove; the other side of the arc-shaped slide way frame is connected with one side of a supporting piece, a plurality of bolt holes are formed in the other side of the supporting piece, and the other side of the supporting piece abuts against the inner wall of the tower barrel. Bolts are detachably arranged in the bolt holes, and through detachable connection of the bolts, the supporting pieces are connected to the inner wall of the tower barrel through the bolts. The steering function of the prestressed cable is achieved through mutual matching of the arc-shaped slide way frame, the flexible protection layer, the supporting piece and the bolts, the steering device has a certain restraining effect on the prestressed cable, and friction between the prestressed cable and the inner wall of the tower drum is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of wind turbine tower auxiliary mechanisms, and in particular relates to a wind turbine tower prestressed cable steering device. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] With the rapid development of the wind power industry, the structure of wind turbines is also constantly improving to meet the ever-increasing requirements. Its characteristics of high hub, large blades and large installed capacity are gradually becoming more prominent. In order to meet the above characteristics, the height of wind turbine towers is also increasing. Steel-concrete hybrid towers are widely used because of their huge cost advantages. The steel-concrete hybrid tower mainly includes a cone section at the bottom and a straight section arranged on its upper part. The cone section and the straight section are respectively composed of multiple sections of cone components and straight components connected in sequence. Therefore, in order to improve the integrity and stability of the tower, the hybrid tower usually needs to be installed with prestressed cables. One end of the prestressed cable is connected to the top of the hybrid tower, and the other end is connected to the bottom foundation. The prestress applied by the prestressed cable compresses the various components of the hybrid tower. At the connection part of the cone section and the straight section, the prestressed cable needs to be turned to connect to the fixed end of the foundation. The existing turning method usually makes a protruding part to achieve the transfer.

[0004] In the existing technology, the prestressed cables extend along the inner wall of the hybrid tower, but at the transition point between the straight section and the tapered section, the prestressed cables usually rub against the inner wall of the tower. This approach has the following disadvantages: the greater the prestress, the more severe the friction, which not only damages the prestressed cables and affects their service life, but the existing steering methods lack effective fixation of the cables. When encountering extreme loads, the prestressed cables cannot work together with the tower. Summary of the invention

[0005] In order to solve the above problems, the utility model proposes a prestressed cable steering device for a wind turbine tower. The utility model realizes the steering function of the prestressed cable by cooperating with an arc-shaped slide frame, a flexible protective layer, a support member and bolts. The steering device has a certain restraining effect on the prestressed cable, thereby avoiding friction between the prestressed cable and the inner wall of the tower.

[0006] According to some embodiments, the utility model adopts the following technical solutions:

[0007] A wind turbine tower prestressed cable steering device comprises an arc-shaped slide frame, a support member and a bolt, wherein one side of the arc-shaped slide frame is provided with a groove for the prestressed cable to pass through;

[0008] The other side of the arc-shaped slide frame is connected to one side of the support member, the other side of the support member is provided with a plurality of bolt holes, and the other side of the support member abuts against the inner wall of the tower;

[0009] The bolt holes are detachably provided with bolts, and the support member is connected to the inner wall of the tower through the bolts through the detachable connection of the bolts.

[0010] As an optional implementation, the arc-shaped slide frame is made of steel.

[0011] As an optional implementation, the outer side of the arc-shaped slide frame is arc-shaped, and the arc is bent toward the inner wall side of the tower.

[0012] As an optional implementation, the groove is provided on the outer side of the arc-shaped slide frame.

[0013] As an optional implementation, a flexible protective layer is provided on the inner edge of the groove, and the upper and lower ends of the flexible protective layer are provided with a certain curvature.

[0014] As an optional implementation, the arc-shaped slide frame and the support member are welded.

[0015] As an optional embodiment, the support member includes a connecting portion and an abutting portion, the end of the connecting portion is arc-shaped and adapted to the inner side of the arc-shaped slide frame, the other end of the connecting portion is connected to the abutting portion, and the abutting portion has an abutting surface at one end close to the inner wall of the tower.

[0016] As a further embodiment, the abutting surface and the inner wall of the tower are arranged in parallel.

[0017] As an optional implementation, a bolt extension portion is provided at both upper and lower ends of the abutting portion, the bolt extension portion protrudes outward relative to the abutting surface, and the center of the bolt extension portion is a bolt hole.

[0018] As an optional implementation, a drill hole is provided on the inner wall of the tower at a location corresponding to the position of the bolt extension portion, and the bolt extension portion is disposed in the drill hole.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model adopts an arc-shaped slide frame made of steel and affixes a flexible protective layer inside the groove of the arc-shaped slide frame to achieve quick and convenient steering of the prestressed steel cable, thereby avoiding friction between the prestressed cable and the inner wall of the tower when steering. In addition, the utility model is provided with a protective layer, which increases the contact area, greatly reduces stress concentration, and can effectively ensure the safety of the cable and the tower.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 A side view of a steering device provided in one embodiment (including bolts);

[0024] Figure 2 A top view of a steering device provided in one embodiment (without bolts);

[0025] Figure 3 A front view of a support member provided for an embodiment (including bolts);

[0026] Figure 4 A cross-sectional view of a support member taken along line AA provided in an embodiment;

[0027] Figure 5 A front view of a curved slide frame provided in an embodiment;

[0028] Figure 6 A cross-sectional view of an arc-shaped slide frame provided in an embodiment.

[0029] Among them, 1. arc-shaped slide frame, 2. support member, 3. bolt, 4. tower inner wall, 5. flexible protective layer. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other.

[0034] Embodiment 1

[0035] Wind turbine tower prestressed cable steering device, such as Figure 1 As shown, it includes an arc-shaped slide frame 1, a flexible protective layer 5, a support member 2 and a bolt 3, wherein:

[0036] In this embodiment, the arc-shaped slide frame 1 is made of steel and has strong stress. A groove is provided on one side of the slide frame, and a flexible protective layer 5 is pasted on the inner wall of the groove, through which the prestressed cable can pass.

[0037] like Figure 5 , 6 As shown, the length of the flexible protective layer 5 matches the length of the outer edge of the arc-shaped slide frame 1, and the upper and lower ends of the flexible protective layer 5 are provided with arcs to avoid cutting the outer protective layer of the prestressed cable.

[0038] like Figure 2 As shown, a support member is welded to one side of the arc-shaped slide frame 1 close to the inner wall 4 of the tower, one end of the support member 2 is welded to the inner side of the arc-shaped slide frame, and a bolt hole is provided at the other end. The support member 2 is connected to the inner wall of the tower by bolts 3.

[0039] like Figure 3 As shown, one end of the support member 2 matches the inner shape of the arc-shaped slide frame, and the other end is a vertically distributed abutment portion to match the tower inner wall 4. A bolt extension portion or a threaded sleeve is provided at both upper and lower ends of the abutment portion, and the bolt extension portion or the threaded sleeve protrudes outward relative to the abutment portion, and the center of the bolt extension portion or the threaded sleeve is a bolt hole.

[0040] For a newly built tower, the external prestressed cable is connected to the inner wall 4 of the tower through the embedded parts inside the tower, which is realized by the internal embedded threaded sleeve when the tower is produced. That is, the embedded parts, such as threaded sleeves, are embedded in the concrete when the tower is manufactured in the factory, and then the arc slide frame 1 is fixed to the threaded sleeve inside the tower by bolts 3;

[0041] For existing towers, the external prestressed cable is connected to the inner wall of the tower by implanting steel bars in the inner wall of the tower. At the construction site, the contact position of the turning point is set out, and holes are drilled to implant the threaded screw and steel bars. Then, the connection between the prestressed cable turning device and the inner wall of the tower 4 is achieved through nuts. Other measures can also be adopted, but detachable mechanical connection should be the main method to facilitate later maintenance and replacement;

[0042] The upper and lower edges of the flexible protective material are both arc-shaped to avoid cutting the outer protective layer of the steel cable.

[0043] The welding of the curved slide frame and the supporting parts and the pasting of the flexible materials are all completed in the factory. Only the installation of bolts and nuts is required on site, which simplifies the on-site construction procedures and improves construction efficiency.

[0044] The above description is only the preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the utility model without creative labor shall be included in the protection scope of the utility model.

Claims

1. A prestressed cable steering device for a wind turbine tower, characterized in that: It comprises an arc-shaped slide frame, a support member and a bolt, wherein a groove is provided on one side of the arc-shaped slide frame for the prestressed cable to pass through; The other side of the arc-shaped slide frame is connected to one side of the support member, the other side of the support member is provided with a plurality of bolt holes, and the other side of the support member abuts against the inner wall of the tower; Bolts are detachably arranged in the bolt holes, and the support member is detachably connected to the inner wall of the tower via the bolts.

2. A wind turbine tower prestressed cable steering device as claimed in claim 1, characterized in that: The arc-shaped slide frame is made of steel.

3. A wind turbine tower prestressed cable steering device as claimed in claim 1 or 2, characterized in that: The outer side of the arc-shaped slide frame is arc-shaped, and the arc is bent toward the inner wall side of the tower.

4. A wind turbine tower prestressed cable steering device as claimed in claim 3, characterized in that: The groove is arranged on the outer side of the arc-shaped slide frame.

5. A wind turbine tower prestressed cable steering device as claimed in claim 1 or 4, characterized in that: A flexible protective layer is arranged on the inner edge of the groove, and upper and lower ends of the flexible protective layer are arranged with a certain curvature.

6. A wind turbine tower prestressed cable steering device as claimed in claim 1, characterized in that: The arc-shaped slide frame and the support member are welded.

7. A wind turbine tower prestressed cable steering device as claimed in claim 1 or 6, characterized in that: The support member includes a connecting portion and an abutting portion. The end of the connecting portion is arc-shaped and matches the inner side of the arc-shaped slide frame. The other end of the connecting portion is connected to the abutting portion. The abutting portion has an abutting surface at one end close to the inner wall of the tower.

8. A wind turbine tower prestressed cable steering device as claimed in claim 7, characterized in that: The abutting surface is arranged parallel to the inner wall of the tower.

9. A wind turbine tower prestressed cable steering device as claimed in claim 7, characterized in that: A bolt extension portion is disposed at both upper and lower ends of the abutting portion. The bolt extension portion protrudes outward relative to the abutting surface, and the center of the bolt extension portion is a bolt hole.

10. A wind turbine tower prestressed cable steering device as claimed in claim 9, characterized in that: A drill hole is arranged on the inner wall of the tower at a position corresponding to the position of the bolt extension part, and the bolt extension part is arranged in the drill hole.

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