Tower drum and wind power generation equipment

Abstract

The invention relates to the technical field of wind power generation, and discloses a tower drum and wind power generation equipment. The barrel assembly is arranged on the bearing foundation and extends in the vertical direction, a plurality of connecting structures are arranged on the surface of the inner ring of the barrel and arranged at intervals in the vertical direction, and supporting parts are further arranged on the inner rings of the connecting structures; and the multiple tensioning assemblies and the multiple connecting structures are arranged in a one-to-one correspondence mode, the upper ends of the tensioning assemblies are connected with the corresponding connecting structures, and the lower ends of the tensioning assemblies are all connected with the bearing foundation. The prestress applied to the barrel assembly is gradually increased from top to bottom, the prestress at the position, close to the upper portion, of the barrel assembly with the small concrete sectional area can be increased, the wall thickness of the position of the barrel assembly does not need to be increased, and the position, with the large concrete sectional area, of the lower portion of the barrel assembly can be fully utilized; and the bearing capacity of the section of the position of the cylinder assembly is fully exerted.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a tower and wind power generation equipment. Background Art

[0002] With the development of large-scale wind turbine units, the tower height of wind turbine units is also increasing. In order to ensure the stability and reliability of the wind turbine tower, the existing tower structure is mostly a steel-concrete combined tower structure. Different from the traditional steel cylinder structure, concrete, an anisotropic material, is added, and a prestressed system is added. The main function of the prestressed system in the concrete tower is to introduce prestress into the structure, so that the concrete structure is in an initial compression state to give full play to the excellent pressure bearing capacity of concrete, while also increasing the structural stiffness to reduce the structural deflection.

[0003] At present, the existing tower prestressing system mainly increases the prestress by tensioning the prestressed steel strands inside the tower. After the tower is hoisted, multiple prestressed steel strands are used to tension from the bottom to the top of the tower. Since the towers of existing wind turbine units are mostly super-high, the cross-sectional areas of the towers in the height direction are not completely consistent. Therefore, the prestress required to be applied at different positions in the height direction of the tower is also different. When using this form of prestressing system, after tensioning the prestressed steel strands, the prestressed load applied by the tower from the bottom to the top is the same. In order to avoid the phenomenon that the tower is easily damaged when the prestress required at the position with a smaller cross-sectional area of ​​the tower is less than the prestress applied by the steel strands, it is necessary to increase the amount of concrete to increase the wall thickness of the tower at that location, thereby increasing the amount of consumables of the tower. Summary of the invention

[0004] In view of this, the present invention provides a tower and a wind power generation equipment to solve the problem that the existing tower prestressing system causes a large amount of material consumption during tower construction.

[0005] In the first aspect, the present invention provides a tower, comprising: a bearing foundation; a cylinder assembly, which is arranged on the bearing foundation and extends vertically, the interior of the cylinder assembly has an installation space extending vertically, and the inner ring surface of the cylinder is provided with a plurality of connecting structures, and the plurality of connecting structures are arranged at vertical intervals; a plurality of tensioning assemblies, which are arranged one by one corresponding to the plurality of connecting structures, the upper ends of the tensioning assemblies are connected to the corresponding connecting structures, and the lower ends are connected to the bearing foundation; wherein the inner ring of the connecting structure also has a supporting portion, and the supporting portion is used to abut and cooperate with the passing tensioning assembly to change the extension direction of the connecting structure.

[0006] Beneficial effect: multiple connection structures are arranged in the cylinder assembly, and multiple tensioning components are used to tension the corresponding connection structures and the bearing foundation respectively. Multiple connection structures arranged in this form can form a tensioning structure gradually stacked from top to bottom inside the cylinder assembly, so that the prestress applied to the cylinder assembly gradually increases from top to bottom. Since the closer the cylinder assembly is to the bottom, the larger the concrete cross-sectional area is, and the larger the concrete cross-sectional area is, the more tensioning components can be arranged on it. Therefore, the prestress applied in this form can more effectively match the structure of the cylinder assembly, which can increase the prestress at the position with smaller concrete cross-sectional area near the upper part of the cylinder assembly. This makes it unnecessary to increase the wall thickness of the cylinder assembly to meet the layout requirements, and can also make full use of the larger concrete cross-sectional area at the lower part of the cylinder assembly, give full play to the bearing capacity of the cross-section of the cylinder assembly at this position, reduce the amount of materials used in the manufacture of the cylinder assembly, and further improve the reliability and flexibility of the prestressed system. In addition, the support part of the connecting structure can be directly used as a steering fulcrum, which can conveniently and quickly change the extension direction of the tensioning assembly, so that the connecting structure has the functions of a connecting platform and a diverter. There is no need to set up an independent diverter, which can reduce the amount of engineering work during tower assembly and effectively solve the problem of large amount of material consumption during tower construction caused by the existing tower prestressed system.

[0007] In an optional embodiment, the cylinder assembly includes a concrete segment and a metal segment, and a plurality of connection structures are arranged on the inner ring surface of the concrete segment.

[0008] Beneficial effects: Prestress can be applied to the concrete segment in a targeted manner, and the structure is simple, reliable and easy to process and manufacture.

[0009] In an optional embodiment, the barrel assembly includes a straight barrel section and a tapered barrel section, the connection position between the straight barrel section and the tapered barrel section is a straight-taper conversion section, and the inner ring surface of the straight-taper conversion section is provided with a connection structure.

[0010] Beneficial effect: Since the inner ring surface of the straight cone conversion section is prone to interfere with the tensioning wire, a connecting structure is provided here to support the passing tensioning wire, thereby avoiding interference.

[0011] In an optional embodiment, each tensioning assembly includes a plurality of tensioning wires, which are arranged in the installation space at intervals along the circumferential direction, one end of the tensioning wire is connected to the corresponding connection structure, and the other end is connected to the bearing foundation.

[0012] Beneficial effects: This type of tensioning assembly has a simple and reliable structure and can apply tension to the connecting structure more evenly. In addition, the tension applied by the tensioning assembly can be flexibly adjusted by increasing or decreasing the number of tensioning wires, and the adjustment method is convenient and quick.

[0013] In an optional embodiment, guide grooves are arranged at intervals along the circumferential direction on the support portion, and the support portion abuts and cooperates with the passing tensioning wire through the guide grooves.

[0014] Beneficial effect: The guide groove can limit the circumferential movement of the tensioning wire abutting against the support portion. Since the number of tensioning wires passing through the inner ring of the connecting structure closer to the bottom is greater, providing a guide groove can effectively avoid interference between adjacent tensioning wires and improve the tensioning reliability of the tensioning wires.

[0015] In an optional embodiment, the inner wall surface of the guide groove is a continuous curved surface, and the connection position between the inner wall of the guide groove and the outer wall of the support portion is chamfered.

[0016] Beneficial effect: Since the tensioning wire is in a taut state after tensioning is completed, this type of guide groove can avoid stress concentration when it abuts against the tensioning wire.

[0017] In an optional embodiment, a through hole is provided inside the connecting structure, and the tensioning wire passes through the through hole from bottom to top and is fixedly connected to the connecting structure.

[0018] Beneficial effects: The fixed connection method is simple and reliable, and can effectively avoid interference between the tensioning wire connected to the connection structure and the tensioning wire passing through the connection structure.

[0019] In an optional embodiment, the barrel assembly includes a plurality of barrel segments connected in sequence along its own extension direction, at least two barrel segments are provided with connecting structures inside, and the barrel segments are integral components.

[0020] Beneficial effects: This type of barrel section is easy to assemble and has better integrity, and has stronger supporting performance after assembly.

[0021] In an optional embodiment, the tensioning wire is a steel strand.

[0022] Beneficial effects: This type of tensioning wire has high tensile strength, good durability, and a wide range of available specifications and sizes.

[0023] In a second aspect, the present invention further provides a wind power generation device, which comprises: a generator set; and the above-mentioned tower, wherein the generator set is arranged on the top of the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic cross-sectional view of a tower according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A three-dimensional schematic diagram of the tower in a cut-away state is shown;

[0027] Figure 3 for Figure 1 The three-dimensional schematic diagram of the tower section provided with a connecting structure is shown.

[0028] Description of reference numerals:

[0029] 1. Bearing foundation;

[0030] 2. Cylinder assembly; 201. Connecting structure; 2011. Supporting portion; 2012. Guide groove; 2013. Through hole; 202. Straight cylinder section; 203. Conical cylinder section;

[0031] 3. Tensioning assembly; 301. Tensioning wire. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0033] In the related art, in order to change the prestress at different positions in the height direction of the cylinder, the integral steel strand is also changed into a segmented steel strand. By setting a plurality of tensioning platforms of different heights in the cylinder, the steel strand is set between two adjacent tensioning platforms to flexibly adjust the prestress at different sections of the cylinder. However, in this arrangement of the steel strand, since the steel strand is arranged in multiple short sections, the assembly and connection steps of the ends of the steel strand are greatly increased during installation.

[0034] In addition, since the tensioning platform needs to be connected to two groups of steel strands with different tensioning directions at the same time, it not only needs to be connected to the upward tensioning steel strands above, but also needs to be connected to the downward tensioning steel strands below, which will significantly increase the force complexity of the tensioning platform. At the same time, more perforations need to be opened inside the tensioning platform to allow the required connected steel strands to pass through. The tensioning platform has many holes, which makes the overall structure complex and difficult to manufacture. It is easy to fail and damage under long-term stress conditions, thereby greatly reducing the stability and reliability of the wind power generation equipment. Furthermore, in order to make the tensioning platform meet the strength requirements under the premise of having more holes, it is also necessary to increase the volume of the tensioning platform, which also increases the amount of consumables during the manufacture of the tensioning platform. Although the flexibility of prestressing setting is improved, there are defects in structural stability, manufacturing convenience and assembly difficulty.

[0035] Combine the following Figures 1 to 3 , describing an embodiment of the present invention.

[0036] According to an embodiment of the present invention, on the one hand, a tower is provided, comprising: a bearing base 1, a cylinder assembly 2 and a plurality of tensioning assemblies 3, the cylinder assembly 2 being arranged on the bearing base 1 and extending vertically, the interior of the cylinder assembly 2 having an installation space extending vertically, the inner ring surface of the cylinder being provided with a plurality of connection structures 201, the plurality of connection structures 201 being arranged at vertical intervals, the plurality of tensioning assemblies 3 being arranged in one-to-one correspondence with the plurality of connection structures 201, the upper ends of the tensioning assemblies 3 being connected to the corresponding connection structures 201, and the lower ends being connected to the bearing base 1, the plurality of tensioning assemblies 3 being inside the cylinder assembly 2, forming a multi-stage superimposed tensioning structure along the extension direction of the cylinder assembly 2.

[0037] In the tower cylinder of the present embodiment, a plurality of connection structures 201 are arranged in the cylinder assembly 2, and a plurality of tensioning assemblies 3 are used to tension the corresponding connection structures 201 and the bearing foundation 1 respectively. The plurality of connection structures 201 arranged in this form can form a tensioning structure gradually stacked from top to bottom inside the cylinder assembly 2, so that the prestress applied to the cylinder assembly 2 gradually increases from top to bottom. Since the cylinder assembly 2 is usually closer to the bottom, the larger the concrete cross-sectional area, and the larger the concrete cross-sectional area, the more tensioning assemblies can be arranged thereon, so the prestress applied in this form can more effectively match the structure of the cylinder assembly 2, which can increase the pressure at the position with smaller concrete cross-sectional area near the upper part of the cylinder assembly 2. The prestressing force makes it unnecessary to increase the wall thickness of the cylinder component 2 at this position, and can also make full use of the position with a larger concrete cross-sectional area in the lower part of the cylinder component 2, give full play to the bearing capacity of the cross section of the cylinder component 2 at this position, reduce the amount of materials used in the manufacture of the cylinder component 2, and further improve the reliability and flexibility of the prestressing system. In addition, the support portion 2011 of the connecting structure 201 can be directly used as a steering fulcrum, which can conveniently and quickly change the extension direction of the tensioning component 3, so that the connecting structure 201 has the functions of both the connecting platform and the diverter, and there is no need to set up an independent diverter, which can reduce the amount of engineering work during the tower assembly, and effectively solves the problem that the existing tower prestressing system causes a large amount of material consumption during tower construction.

[0038] It should be noted that vertical refers to Figure 1 The “vertical” direction indicated by the middle arrow is the height direction and the up-down direction of the tower; the tensioning assembly 3 passed through refers to the tensioning assembly 3 connected to the connection structure 201 located above the current connection structure 201.

[0039] In addition, the cylinder assembly 2 includes a concrete section and a steel section. Since the part of the tower that mainly needs to be prestressed is the concrete tower section, the upper and lower parts of the cylinder assembly 2 are both the upper and lower parts of the concrete section of the cylinder assembly 2; multiple connecting structures 201 are arranged in sequence from top to bottom along the concrete section of the cylinder assembly 2.

[0040] Preferably, the vertically uppermost connection structure 201 is located on the inner ring surface of the top of the concrete section of the cylinder assembly 2 .

[0041] Specifically, the tensioning platform in the related art needs to be assembled and connected with the steel strands on the upper and lower sides respectively. Compared with the graded and segmented arrangement of the steel strands in the related art, the arrangement of the tensioning assembly 3 of the tower in this embodiment is graded and non-segmented. Under this arrangement, each connection structure 201 only needs to be assembled and connected with a corresponding tensioning assembly 3, and each connection structure 201 only needs to be set with a single-sided tensioning working surface. Not only does it require fewer assembly steps for operators at a higher position, but each connection structure 201 will only be subjected to the downward pulling force of the tensioning assembly 3 connected thereto, which effectively simplifies the stress state of the connection structure 201 and makes the connection structure 201 more reliable and durable.

[0042] Furthermore, since the bottom tensioning termination positions of each level of tensioning components 3 are all located on the bearing foundation 1, half of the tensioning operation steps in the multiple tensioning components 3 only need to be completed on the ground. Compared with assembly operations at a higher altitude, the assembly difficulty can be greatly reduced and the assembly efficiency of the operator can be improved.

[0043] Among them, there is no limitation on the specific form of the connection structure 201 and the support part 2011 thereon. The connection structure 201 can be an annular structure or a multi-segment structure arranged in a ring-shaped manner with multiple segments at intervals. The support part 2011 can be the inner ring wall surface of the connection structure 201 or a support structure protruding from the inner ring wall surface of the connection structure 201.

[0044] In a possible implementation, the cylinder assembly 2 includes a concrete segment and a metal segment, and a plurality of connection structures 201 are disposed on the inner ring surface of the concrete segment, which can apply prestress to the concrete segment in a targeted manner. The structure is simple, reliable, and easy to process and manufacture.

[0045] In a possible embodiment, the cylinder assembly 2 includes a straight cylinder section 202 and a tapered cylinder section 203. The connection position between the straight cylinder section 202 and the tapered cylinder section 203 is a straight-cone conversion section. The inner ring surface of the straight-cone conversion section is provided with a connecting structure 201. Since the inner ring surface of the straight-cone conversion section is prone to interfere with the tensioning wire 301, a connecting structure 201 is provided here to support the tensioning wire 301 passing through, thereby avoiding interference.

[0046] It can be understood that, as an alternative implementation, it can also be arranged on the straight cylinder section 202 or the tapered cylinder section 203 close to the straight-cone conversion section, as long as interference can be avoided.

[0047] It should be noted that the inner ring surface of the straight cone conversion section is provided with a connecting structure 201 here does not mean that the connecting structure 201 is only provided on the inner ring surface of the straight cone conversion section, but at least one of the connecting structures 201 is provided on the inner ring surface of the straight cone conversion section.

[0048] In a possible embodiment, each tensioning assembly 3 includes a plurality of tensioning wires 301, and the plurality of tensioning wires 301 are arranged in the installation space along the circumferential interval, one end of the tensioning wire 301 is connected to the corresponding connection structure 201, and the other end is connected to the bearing base 1. This form of tensioning assembly 3 has a simple and reliable structure and can apply tension to the connection structure 201 more evenly. In addition, the tension applied by the tensioning assembly 3 can be flexibly adjusted by increasing or decreasing the number of tensioning wires 301, and the adjustment method is convenient and quick.

[0049] Specifically, there is no limitation on the specific type and number of the tensioning wires 301 , which can be selected according to the specific structural form of the cylinder assembly 2 . The tensioning wires 301 can be one or more.

[0050] Furthermore, the tensioning wires 301 in a tensioning assembly 3 may be arranged at equal intervals or at unequal intervals along the circumferential direction.

[0051] In addition, since the preload force applied by the multiple tensioning assemblies 3 on the cylinder assembly 2 in the present embodiment is in the form of gradual superposition from top to bottom, compared with the graded and segmented arrangement of the steel strands in the related art, the preload force required to be provided by the multiple tensioning assemblies 3 from top to bottom of the cylinder assembly 2 gradually decreases. Therefore, along the vertical downward direction, the tension required to be provided by the tensioning assemblies 3 also gradually decreases. Therefore, along the vertical downward direction, the number of tensioning wires 301 in the tensioning assemblies 3 can also become less and less, and the number of tensioning wires 301 used can also be reduced.

[0052] In a possible embodiment, guide grooves 2012 are arranged at intervals along the circumferential direction on the support portion 2011, and the support portion 2011 abuts against the tensioning wire 301 passing through the guide grooves 2012. The guide grooves 2012 can limit the circumferential movement of the tensioning wire 301 abutting against the support portion 2011. Since the number of tensioning wires 301 passing through the inner circle of the connecting structure 201 closer to the bottom is greater, the provision of the guide grooves 2012 can effectively avoid interference between adjacent tensioning wires 301, thereby improving the tensioning reliability of the tensioning wire 301.

[0053] The guide groove 2012 extends along the extension direction of the tensioning wire 301 .

[0054] Specifically, there is no limitation on the specific structural form of the guide groove 2012, which can be a rectangular groove or a semicircular groove, and can be flexibly selected.

[0055] In a possible embodiment, the inner wall surface of the guide groove 2012 is a continuous curved surface, and the connection position between the inner wall of the guide groove 2012 and the outer wall of the support portion 2011 is chamfered. Since the tensioning wire 301 is in a taut state after tensioning, this form of guide groove 2012 can avoid stress concentration when it abuts against the tensioning wire 301.

[0056] In a possible implementation, Figure 2 and Figure 3 As shown, a through hole 2013 is provided inside the connection structure 201, and the tensioning wire 301 passes through the through hole 2013 from bottom to top and is fixedly connected to the connection structure 201. The fixed connection method is simple and reliable, and can effectively avoid interference between the tensioning wire 301 connected to the connection structure 201 and the tensioning wire 301 passing through the connection structure 201.

[0057] Specifically, Figure 2 and Figure 3 As shown, the upper surface of the connection structure 201 forms a support surface. After the tensioning wire 301 passes through the through hole 2013 from bottom to top, a fixing component whose end diameter is larger than the diameter of the through hole 2013 abuts against the support surface, thereby fixing the upper end of the tensioning wire 301.

[0058] In a possible embodiment, the barrel assembly 2 includes a plurality of barrel segments connected in sequence along its extension direction, and a connecting structure 201 is arranged inside at least two barrel segments. The barrel segments are one-piece components. This type of barrel segment is easy to assemble and has better integrity, and has stronger supporting performance after assembly.

[0059] It can be understood that, as an alternative embodiment, the barrel segment provided with the connection structure 201 can also be a split structure, which is spliced ​​by an independent connection structure 201 and ring segments on the upper and lower sides. The specific form of the barrel segment can be flexibly selected according to needs.

[0060] Furthermore, there is no limitation on the specific material and structure of the connection structure 201, which may be a solid structure or a hollow structure with a cavity, a steel box beam or a concrete beam, and may be selected according to the actual manufacturing requirements of the tower.

[0061] Preferably, the connection structure 201 is a ring-shaped steel box girder.

[0062] In a possible implementation, the tensioning wire 301 is a steel strand. This type of tensioning wire 301 has high tensile strength, good durability, and a wide range of available specifications and sizes.

[0063] It can be understood that, as an alternative embodiment, the tensioning wire 301 can also be a carbon fiber reinforced polymer cable, a glass fiber reinforced polymer cable, a parallel steel wire bundle, etc.

[0064] According to an embodiment of the present invention, on the other hand, a wind power generation device is provided, which includes: a generator set and the above-mentioned tower, wherein the generator set is arranged on the top of the tower.

[0065] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A tower, characterized in that: include: Bearing foundation (1); A cylinder assembly (2) is arranged on the bearing base (1) and extends vertically, the cylinder assembly (2) has an installation space extending vertically inside, the inner surface of the cylinder is provided with a plurality of connection structures (201), and the plurality of connection structures (201) are arranged at intervals along the vertical direction; A plurality of tensioning components (3) are arranged in one-to-one correspondence with the plurality of connection structures (201), the upper ends of the tensioning components (3) being connected to the corresponding connection structures (201), and the lower ends of the tensioning components (3) being connected to the bearing foundation (1); The inner ring of the connection structure (201) further comprises a support portion (2011), and the support portion (2011) is used to abut and cooperate with the tensioning assembly (3) passing through to change the extension direction of the connection structure (201).

2. The tower according to claim 1, characterized in that: The cylinder assembly (2) comprises a concrete segment and a metal segment, and a plurality of connection structures (201) are arranged on the inner ring surface of the concrete segment.

3. The tower according to claim 1, characterized in that: The barrel assembly (2) comprises a straight barrel section (202) and a tapered barrel section (203); the connection position between the straight barrel section (202) and the tapered barrel section (203) is a straight-to-taper conversion section; the inner ring surface of the straight-to-taper conversion section is provided with the connection structure (201).

4. The tower according to any one of claims 1 to 3, characterized in that: Each of the tensioning components (3) comprises a plurality of tensioning wires (301), which are arranged in the installation space at intervals along the circumferential direction, one end of the tensioning wire (301) is connected to the corresponding connection structure (201), and the other end is connected to the bearing foundation (1).

5. The tower according to claim 4, characterized in that: The support portion (2011) is provided with guide grooves (2012) at intervals along the circumferential direction, and the support portion (2011) is abutted and matched with the tensioning wire (301) passing through the guide grooves (2012).

6. The tower according to claim 5, characterized in that: The inner wall surface of the guide groove (2012) is a continuous curved surface, and the connection position between the inner wall of the guide groove (2012) and the outer wall of the support portion (2011) is chamfered.

7. The tower according to claim 4, characterized in that: A through hole (2013) is provided inside the connection structure (201), and the tensioning wire (301) passes through the through hole (2013) from bottom to top and is fixedly connected to the connection structure (201).

8. The tower according to any one of claims 1 to 3, characterized in that: The barrel assembly (2) comprises a plurality of barrel segments connected in sequence along its own extension direction, at least two of the barrel segments are provided with connection structures (201) inside, and the barrel segments are integral components.

9. The tower according to claim 4, characterized in that: The tensioning wire (301) is a steel strand.

10. A wind power generation device, characterized in that: include: Generator sets; The tower according to any one of claims 1 to 9, wherein the generator set is arranged at the top of the tower.

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