Novel diagonal-cable-free truss type anemometer tower structure

Abstract

The utility model discloses a novel diagonal-line-free truss type anemometer tower structure which comprises a foundation pier, truss standard knots, mass dampers and steel wire ropes. The plurality of truss standard knots are sequentially connected from bottom to top and are mounted on the foundation pier to form an anemometer tower body; a mass damper is arranged in each truss standard knot, and the mass dampers are connected with the tops of the truss standard knots through a plurality of steel wire ropes; according to the utility model, vibration reduction processing is carried out through the mass damper, so that the anemometer tower can be stable under the condition of no stay wire; in addition, in consideration of the climbability of the ultrahigh anemometer tower and reduction of steel loss, the truss type structure is adopted, so that more climbing space is provided, meanwhile, the steel loss can be reduced, the wind load is smaller, and the stability is more facilitated; and the mass damper and a smaller wind area enable the structure to meet higher tower erecting requirements and adapt to meteorological measurement of a current large-megawatt fan.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power wind measurement towers, in particular to a novel inclined-wire-free truss-type wind measurement tower structure. Background Art

[0002] Wind farm assessments before wind turbine erection and load testing after erection often require the erection of a wind tower to collect wind speed, direction, temperature, humidity, and pressure data, often collected at a hub height of 0-10 meters. In recent years, with the continuous increase in the megawatt power of wind turbines, the hub height has increased rapidly, making the erection of wind towers increasingly difficult.

[0003] The current industry experience in erecting wind towers is to build a concrete foundation and then begin erecting the tower body with a standard section structure. Starting from a height of 10m, a diagonal wire is evenly pulled in three directions every 10m, with three wires forming a layer. The intervals between the diagonal wires are all 120 degrees. Finally, every three of these diagonal wires are pulled to a concrete anchor point on the ground, with each anchor point spaced 18m apart. According to the current tower erection rules, as the hub center height of the unit increases, two problems arise: 1. Erecting the tower with diagonal wires requires an increasing amount of ground area, which increases the cost and may be affected by other vegetation such as trees. 2. There are too many diagonal wires, making it difficult to ensure the reliability of each diagonal wire.

[0004] Reducing the number of inclined guy wires or eliminating the need for inclined guy wires has become the key to a successful tower erection. Currently, there are two types of wind towers in the industry that do not require inclined guy wires. One is a self-supporting tower type, which relies mainly on the stability of the bottom foundation and adopts a structure that is larger at the bottom and smaller at the top, as shown in Chinese invention patent CN108152533B. The other type uses a tower tube as a structural support, just like a wind turbine generator set, as shown in Chinese invention patent CN109057499B. Of course, there are also folding truss types, such as Chinese invention patent CN116146023B. Among the above wind towers, the self-supporting and folding truss types are not suitable. If the height exceeds 100m, the self-supporting foundation will be too large, the rods will be too thick, and the consumables and floor space will increase. The folding type has poor stability at too high a height and is prone to the risk of tower collapse. Although the tower-type wind measurement tower can reach a higher height, it is impossible to climb up from the outer surface when installing the top wind measurement equipment. It can only climb from the inside of the tower. At this time, a steel ladder needs to be pre-attached inside the tower, which not only makes the steel loss of the entire steel tower too large and the weight too large, but also requires the cooperation of a crane during installation, which increases the difficulty of construction.

[0005] In summary, the current wind measurement towers for large-megawatt wind turbines are still suitable for truss-type structural towers as the tower structure, but the conventional tower erection method requires the installation of multiple inclined cables, which is limited by the land area and the influence of terrain and vegetation. Utility Model Content

[0006] The purpose of this utility model is to address the deficiencies in the prior art by providing a novel guy wire-free truss-type wind tower structure. This structure utilizes mass dampers for vibration reduction, allowing the tower to remain stable even without guy wires. Furthermore, considering the climbability of ultra-high wind towers and the reduction of steel loss, this structure utilizes a truss structure, which provides more climbing space while also reducing steel loss, resulting in less wind load and greater stability. The combination of a mass damper and a smaller wind-exposed area allows this structure to meet higher tower requirements and accommodate meteorological measurements for current large-megawatt wind turbines.

[0007] To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a new type of inclined wire-free truss wind measurement tower structure, including a foundation pier, a truss standard section, a mass damper and a steel wire rope; the truss standard section has multiple sections connected in sequence from bottom to top and installed on the foundation pier to form a wind measurement tower body; each truss standard section is equipped with a mass damper, and the mass damper is connected to the top of the truss standard section through multiple steel wire ropes.

[0008] Furthermore, the structure also includes an anemometer and a lightning rod; the anemometer is arranged in multiples on the top of the wind measurement tower body, the anemometer includes a top support rod and a wind speed pole connected in sequence from bottom to top, and the lightning rod is connected to the top support rod through a cross rod.

[0009] Furthermore, the structure also includes a wind vane; the wind vane is arranged on the side of the wind measurement tower body and close to the top of the wind measurement tower body.

[0010] Furthermore, the foundation pier is provided with frame steel bars, middle transverse steel bars, diagonal steel bars and longitudinal steel bars. The frame steel bars are arranged around the bottom of the foundation pier, the middle transverse steel bars are arranged horizontally at the bottom of the foundation pier, the diagonal steel bars are arranged diagonally along the four corners of the bottom of the foundation pier, and multiple longitudinal steel bars are arranged from bottom to top through the foundation pier.

[0011] Furthermore, the foundation pier is a concrete foundation pier.

[0012] Furthermore, the height of each standard section of the truss is 2.5-3m.

[0013] Furthermore, the truss standard sections are steel tube truss standard sections, and each truss standard section is connected by bolts.

[0014] Furthermore, the wind measurement tower body is in the shape of a regular triangular pyramid.

[0015] Furthermore, the mass damper is a steel ball.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The utility model does not require inclined cables, reduces floor space and is less restricted by environmental vegetation, and can adapt to more tower erection scenarios.

[0018] 2. The utility model does not require inclined cables, thus reducing the work of checking the reliability of multiple inclined cables during the construction process.

[0019] 3. The prefabricated truss standard section of the utility model maintains the characteristics of being lightweight and climbable, and has a higher erection height, reduces the loss of steel materials, and can be reused.

[0020] 4. The multi-layer mass damper offsets the impact of wind load on the tower body and reduces the risk of tower collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the structural diagrams of a standard truss section.

[0022] Figure 2 This is the second structural diagram of the standard truss section.

[0023] Figure 3 Schematic diagram of the anemometer structure.

[0024] Figure 4 It is a structural front view of the utility model.

[0025] Figure 5 It is a top view of the structure of the present utility model.

[0026] Figure 6 It is a structural side view of the utility model.

[0027] Figure 7 This is a bottom view of the foundation pier structure. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to specific embodiments.

[0029] See also Figures 1 to 7 As shown in FIG, the novel structure of the diagonal-wire-free truss-type wind tower provided in this embodiment includes a foundation pier 1, a truss standard section 2, a mass damper 3, a steel wire rope 4, an anemometer 5, a lightning rod 6 and a wind vane 7.

[0030] The foundation pier 1 is a concrete foundation pier with a length, width and height of 1m respectively. The foundation pier 1 is provided with 4 frame steel bars 101, 2 middle transverse steel bars 102, 4 diagonal steel bars 103 and 18 longitudinal steel bars 104. The frame steel bars 101 are arranged around the bottom of the foundation pier 1, and the middle transverse steel bars 102 are arranged horizontally at the bottom of the foundation pier 1. The diameters of the frame steel bars 101, the middle transverse steel bars 102 and the diagonal steel bars 103 are all φ10mm. The diagonal steel bars 103 are arranged diagonally along the four corners of the bottom of the foundation pier 1. There are 18 longitudinal steel bars 104 that penetrate the foundation pier 1 from bottom to top to bear the upper bending moment. The diameter of the longitudinal steel bars 104 is φ20mm.

[0031] The truss standard sections 2 are connected and installed on the foundation pier 1 in sequence from bottom to top to form a wind measurement tower body. The wind measurement tower body is in the shape of a regular triangular pyramid, and the side width of the wind measurement tower body is 700 mm. Among them, the truss standard section 2 located at the top of the wind measurement tower body is different from other truss standard sections 2 in that: multiple cross bars a are installed on the top.

[0032] The height of each truss standard section 2 is 2.5-3m. The truss standard section 2 is set to 1 section of steel pipe with a diameter of φ70mm, 9 sections of steel pipe with a diameter of φ60mm, 10 sections of steel pipe with a diameter of φ50mm, 14 sections of steel pipe with a diameter of φ40mm, 10 sections of steel pipe with a diameter of φ38mm, and 10 sections of steel pipe with a diameter of φ35mm. Among them, the height of the bottom truss standard section is 3m, the height of the truss standard section of steel pipe with a diameter of φ35mm is 2.5m, and the total height of the tower body is 157m. The anemometer 5 consists of a 2.2m top support rod 501 with a diameter of φ50mm and a 0.8m wind speed vertical rod 502 with a diameter of φ34mm. The height of the anemometer is 160m. A horizontal rod 601 with a length of 400mm, a height of 2.5m, and a diameter of φ12mm is led out from the top support rod 501. The anemometer 7 is arranged on the side of the wind measurement tower body and close to the top of the wind measurement tower body.

[0033] Each truss standard section 2 is equipped with a mass damper 3, which is connected to the top of the truss standard section 2 via multiple steel wire ropes 4. The mass damper 3 is a steel ball with a diameter of φ60mm and a mass of 7.1kg. The three directions of the mass damper 3 are respectively tied with steel wire ropes 4 with a diameter of φ0.5mm at the top of each truss standard section 2.

[0034] The installation method of the novel inclined-wire-free truss-type wind tower structure provided in this embodiment is as follows:

[0035] S1. During the tower body and test equipment preparation phase, the tower body standard, two sets of calibrated anemometers and wind vanes, and the required pre-buried steel bars are customized.

[0036] S2. Use mechanical or manual excavation to dig a 1m*1m*1m foundation pit, and set 4 frame steel bars, 2 middle transverse steel bars and 4 diagonal steel bars at the bottom of the foundation pier. The diameter of the steel bars is φ10mm. Then, 18 longitudinal steel bars with a diameter of φ20mm are added to the frame. The longitudinal steel bars should be inserted into the concrete for more than 0.3m.

[0037] S3. After arranging the steel bars, start pouring concrete to a height of about 0.5m, then embed the first truss standard section into the concrete, and vibrate the concrete several times until it is dense.

[0038] S4. After the foundation concrete has finally set, the tower installation can begin, depending on the on-site temperature and humidity conditions. For smaller wind towers, a hand winch is hung on the top of the first truss standard section. The second truss standard section is then lifted in reverse by the hand winch until it reaches the top of the first truss standard section. Finally, the construction and installation personnel pull the bottom of the second truss standard section and rotate it to the top of the first truss standard section. The middle connecting plate of the first truss standard section is tightened with a wrench or other tool until it is secure. For larger wind towers, where the tower body is tall and the truss standard section is heavy, manual flipping of the standard section for docking and installation is not possible, the tower is hoisted by an auxiliary vehicle such as a crane. When the weight is lighter at the top, the hand winch is then used to hoist the tower up and install it.

[0039] S6. Install these sensors in the order of main anemometer, reference anemometer, main wind vane, and reference wind vane from bottom to top, and tie the signal lines along the edge of the tower and pull them to the tower signal acquisition equipment.

[0040] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any changes made based on the shape and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new type of truss-type wind tower structure without inclined wires, characterized by: It includes a foundation pier, a truss standard section, a mass damper and steel wire ropes; the truss standard sections are connected in sequence from bottom to top and installed on the foundation pier to form a wind measurement tower body; each truss standard section is equipped with a mass damper, and the mass damper is connected to the top of the truss standard section through multiple steel wire ropes.

2. The novel truss-type wind tower structure without inclined wires according to claim 1 is characterized in that: It also includes an anemometer and a lightning rod; the anemometer is arranged in multiples on the top of the wind measuring tower body, the anemometer includes a top support rod and a wind speed pole connected in sequence from bottom to top, and the lightning rod is connected to the top support rod through a cross rod.

3. The novel truss-type wind tower structure without inclined wires according to claim 1 is characterized by: It also includes a wind vane; the wind vane is arranged on the side of the wind measuring tower body and close to the top of the wind measuring tower body.

4. The novel truss-type wind tower structure without inclined wires according to claim 1 is characterized in that: The foundation pier is provided with frame steel bars, middle transverse steel bars, diagonal steel bars and longitudinal steel bars. The frame steel bars are arranged around the bottom of the foundation pier, the middle transverse steel bars are arranged transversely at the bottom of the foundation pier, the diagonal steel bars are arranged diagonally along the four corners of the bottom of the foundation pier, and multiple longitudinal steel bars are arranged from bottom to top through the foundation pier.

5. The novel truss-type wind tower structure without inclined wires according to claim 4 is characterized in that: The foundation pier is a concrete foundation pier.

6. The novel truss-type wind tower structure without inclined wires according to claim 1 is characterized in that: The height of each standard truss section is 2.5-3m.

7. The novel type of wind tower structure without inclined wires according to claim 1, characterized in that: The truss standard sections are steel tube truss standard sections, and the truss standard sections are connected by bolts.

8. The novel truss-type wind tower structure without inclined wires according to claim 1 is characterized in that: The wind measurement tower body is in the shape of a regular triangular pyramid.

9. The novel truss-type wind tower structure without inclined wires according to claim 1 is characterized in that: The mass damper is a steel ball.

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