Transition connection structure of reinforced concrete tower drum

Abstract

The invention relates to the technical field of fan towers, and discloses a reinforced concrete tower transition connection structure which comprises a concrete tower and a steel tower, the steel tower is coaxially mounted at the top of the concrete tower in a butt joint mode, an anchoring assembly is arranged in the steel tower, and the anchoring assembly comprises a positioning steel rod, a fixing sleeve, an anchoring rod, a telescopic rod and a tension sensor. The telescopic rod is used for adjusting the anchoring force of the anchoring rod, and the tension sensor is used for detecting the anchoring force of the anchoring rod on the concrete tower drum and the steel tower drum in real time, so that the connection strength of the transition section of the concrete tower drum and the steel tower drum is monitored in real time. The reinforced concrete tower tube transition connection structure is connected, reinforced, anchored and positioned through the anchoring assembly, meanwhile, the anchoring assembly detects the stress condition of each set of anchoring rods through a sensor, the tension of the anchoring rods is finely adjusted through a hydraulic system telescopic rod, static anchoring is changed into dynamic balance, and the anchoring effect is improved. A radial force balance network is formed by the annular arrays of the multiple sets of anchoring rods, and load differences in different directions are automatically balanced.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine towers, and in particular to a steel-concrete tower transition connection structure. Background Art

[0002] Steel-concrete towers, that is, hybrid wind turbine towers composed of steel structure and concrete structure, not only meet the requirements of high power generation and low cost, but are also extremely reliable and more adaptable to areas with complex wind conditions, and have a wide range of applications.

[0003] The prior art provides a transition section structure connecting a steel tower and a prestressed concrete tower, with application number CN201610246865.5, comprising a first and a second connecting steel cylinder, an annular support plate, and a concrete section; the steel tower is connected to the first connecting steel cylinder through a first flange, the first connecting steel cylinder is connected to the second connecting steel cylinder through a second flange, the second connecting steel cylinder is connected to the concrete section through an annular support plate, and the concrete section is connected to the concrete tower; the internal prestressed tendons and the external prestressed tendons are respectively anchored on the second flange in succession, an internal annular anchoring steel plate and an external annular anchoring steel plate are welded under the annular support plate, reinforcing ribs are provided between the second flange and the annular support plate, and vertical reinforcing plates are provided along the circumference between the internal and external annular anchoring steel plates. This invention solves the problem that the concrete tower frame is easy to crack and the internal prestressed tendons anchored outside the tower are difficult to maintain, but this application still has the following problems:

[0004] The existing prestressed tendon anchoring system adopts a fixed preload design, while the wind turbine tower actually bears alternating stress with an annual cyclic load of over one million times. Long-term alternating stress causes the prestress attenuation rate to increase, and problems such as micro-slip at the flange connection may occur. At the same time, these problems are in the blind spot of irreversible damage monitoring. Visual inspection and regular flaw detection in traditional solutions cannot capture instantaneous overload and dynamic imbalance of anchoring force. For this reason, we need to propose a steel-concrete tower transition connection structure. Summary of the invention

[0005] The purpose of the present invention is to provide a technical solution to strengthen the anchoring of the connecting section of the steel-concrete tower through an anchoring assembly, while achieving dynamic balance and real-time monitoring of the anchoring force inside the tower, so as to solve the problems in the prior art raised in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A steel-concrete tower transition connection structure comprises: a concrete tower and a steel tower, wherein the coaxial butt joint of the steel tower is installed at the top of the concrete tower, wherein an anchoring assembly is arranged inside the steel tower, wherein the anchoring assembly comprises a positioning steel rod, a fixing kit and an anchoring rod, wherein the fixing kit is fixedly sleeved on the positioning steel rod, and the anchoring rod is rotatably installed on the positioning steel rod through the fixing kit, wherein one group of anchoring rods is anchored on the inner side wall of the concrete tower, and another group of anchoring rods is anchored on the inner side wall of the steel tower, and the two groups of anchoring rods generate an inward anchoring force on the concrete tower and the steel tower, thereby ensuring that the butt joint of the concrete tower and the steel tower is firmly connected;

[0008] A telescopic rod is arranged between the positioning steel rod and the anchor rod, and the telescopic rod is used to adjust the anchoring force of the anchor rod. A tension sensor is arranged between the positioning steel rod and the anchor rod, and the tension sensor is used to detect the anchoring force of the anchor rod on the concrete tower and the steel tower in real time, thereby monitoring the connection strength of the transition section between the concrete tower and the steel tower in real time.

[0009] Preferably, the fixing kit includes a fixing kit 1 and a fixing kit 2, and the fixing kit 1 and the fixing kit 2 are fixedly mounted on a positioning steel rod. Two groups of fixing kit 1 and fixing kit 2 are arranged on the positioning steel rod, and the two groups of fixing kit 1 and fixing kit 2 respectively correspond to two groups of anchor rods used to anchor the concrete tower and the steel tower.

[0010] Preferably, the inner side of the anchor rod is rotatably connected with a connecting rod, the tension sensor is connected to the anchor rod through the connecting rod, the telescopic rod is configured as a hydraulic telescopic rod, and the hydraulic telescopic rod is connected to the anchor rod through the connecting rod; the inner ends of the hydraulic telescopic rod and the anchor rod are at the same rotational connection position, and the outer ends of the tension sensor are respectively rotatably connected to the connecting rod and the hydraulic telescopic rod.

[0011] Preferably, the fixing kit 1 and the fixing kit 2 are provided with rotating parts for rotational connection, the anchor rod is rotationally connected to the fixing kit 1 via the rotating part, and the tension sensor is rotationally connected to the fixing kit 2 via the rotating part.

[0012] Preferably, the top and bottom of the positioning steel rod are fixedly connected with a positioning steel frame, the top positioning steel frame is connected to the inner wall of the concrete tower via a positioning support frame, and the bottom positioning steel frame is connected to the inner wall of the steel tower via a positioning support frame.

[0013] Preferably, the anchor rods are arranged in a plurality of groups distributed in a circular array, the ends of the anchor rods anchoring the concrete tower are connected with connector 2, and the ends of the anchor rods anchoring the steel tower are connected with connector 1, and both connector 1 and connector 2 are arranged in an arc structure to adapt to the internal arc shape of the concrete tower and the steel tower.

[0014] Preferably, the concrete tower comprises a plurality of tower splicing sections that are assembled and connected together, the steel tower comprises a steel cylinder connecting section and a steel cylinder, and the steel tower is installed on the top of the concrete tower via the steel cylinder connecting section at the bottom.

[0015] Preferably, the tower splicing section is assembled from four concrete blocks, and four groups of anchor rods distributed in a circular array are provided, and the same number of anchor rods can provide inward anchoring force for the tower splicing section.

[0016] Technical effects and advantages of the present invention: Compared with the prior art, the steel-concrete tower transition connection structure proposed by the present invention has the following advantages:

[0017] The present invention connects and strengthens the anchoring position of the steel-concrete tower transition connection structure through an anchoring assembly. At the same time, the anchoring assembly detects the stress condition of each group of anchor rods through sensors, and fine-tunes the tension of the anchor rods through the telescopic rods of the hydraulic system, changing static anchoring into dynamic balance. A circular array of multiple groups of anchor rods forms a radial force balance network, which automatically balances the load differences in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the steel-concrete tower transition connection structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the top view of the steel-concrete tower transition connection structure of the present invention;

[0020] Figure 3 It is a front cross-sectional structural schematic diagram of the steel-concrete tower transition connection structure of the present invention;

[0021] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 5 It is a schematic diagram of the internal structure of the steel-concrete tower of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the anchor assembly and the positioning steel frame of the present invention;

[0024] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0025] In the figure:

[0026] 11. Concrete tower; 12. Steel tower; 13. Steel cylinder connection section; 14. Steel cylinder; 15. Tower splicing section; 16. Positioning steel frame; 17. Positioning support frame;

[0027] 2. Anchor assembly; 21. Positioning steel rod; 22. Fixing kit 1; 23. Fixing kit 2; 24. Anchor rod; 25. Connecting rod; 26. Rotating part; 27. Hydraulic telescopic rod; 28. Tension sensor; 29. ​​Connecting piece 1; 210. Connecting piece 2; 211. Connecting plate. DETAILED DESCRIPTION

[0028] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0029] The invention provides Figures 1 to 7 As shown, a steel-concrete tower transition connection structure comprises:

[0030] The concrete tower 11 and the steel tower 12 are coaxially butted and installed at the top of the concrete tower 11. An anchor assembly 2 is arranged inside the steel tower 12. The anchor assembly 2 includes a positioning steel rod 21, a fixing kit and an anchor rod 24. The fixing kit is fixedly sleeved on the positioning steel rod 21. The anchor rod 24 is rotatably installed on the positioning steel rod 21 through the fixing kit. One group of anchor rods 24 is anchored on the inner side wall of the concrete tower 11, and the other group of anchor rods 24 is anchored on the inner side wall of the steel tower 12. The two groups of anchor rods 24 generate an inward anchoring force on the concrete tower 11 and the steel tower 12, so as to ensure that the butt joint of the concrete tower 11 and the steel tower 12 is firmly connected.

[0031] A telescopic rod is arranged between the positioning steel rod 21 and the anchor rod 24, and the telescopic rod is used to adjust the anchoring force of the anchor rod 24. A tension sensor 28 is arranged between the positioning steel rod 21 and the anchor rod 24, and the tension sensor 28 is used to detect the anchoring force of the anchor rod 24 on the concrete tower 11 and the steel tower 12 in real time, so as to monitor the connection strength of the transition section between the concrete tower 11 and the steel tower 12 in real time.

[0032] Working principle: The anchoring assembly 2 is used to achieve a firm connection between the concrete tower 11 and the steel tower 12. The telescopic rod is used to adjust the anchoring force of the anchor rod 24. The tension sensor 28 detects the anchoring force of the anchor rod 24 on the concrete tower 11 and the steel tower 12 in real time, thereby monitoring the connection strength of the transition section in real time; real-time monitoring, the tension sensor 28 can detect the anchoring force in real time to ensure the visualization and controllability of the connection strength of the transition section; adjustment function, the telescopic rod can adjust the anchoring force of the anchor rod 24 to adapt to different working conditions and improve the reliability of the connection; structural stability, through the inward anchoring force, ensure that the joints of the concrete tower 11 and the steel tower 12 are firmly connected, thereby enhancing the stability of the overall structure.

[0033] like Figure 4 As shown, the fixing kit includes a fixing kit 1 22 and a fixing kit 2 23, which are fixedly sleeved on the positioning steel rod 21, and two sets of fixing kits 1 22 and fixing kits 2 23 are arranged on the positioning steel rod 21, and the two sets of fixing kits 1 22 and fixing kits 2 23 correspond to two sets of anchoring rods 24 for anchoring the concrete tower 11 and the steel tower 12. Specifically, a connecting plate 211 is arranged between the fixing kit 1 22 and the fixing kit 2 23, and the connecting plate 211 is supported between the two to ensure the stable position of the fixing kit 1 22 and the fixing kit 2 23 on the positioning steel rod 21.

[0034] like Figure 4 As shown, the inner side of the anchor rod 24 is rotatably connected with a connecting rod 25, the tension sensor 28 is connected to the anchor rod 24 through the connecting rod 25, and the hydraulic telescopic rod 27 is connected to the anchor rod 24 through the connecting rod 25; the inner end of the hydraulic telescopic rod 27 and the anchor rod 24 are at the same rotational connection position, and the outer end of the tension sensor 28 is rotatably connected to the connecting rod 25 and the hydraulic telescopic rod 27 respectively. Specifically, the tension sensor 28 can provide real-time feedback on the change of the anchoring force. When the anchoring force is abnormal, the control system can timely adjust the extension amount of the hydraulic telescopic rod 27, and fine-tune the tension of the anchor rod 24 through the action of the connecting rod 25, so as to maintain the stability of the anchoring force. This real-time monitoring and fine-tuning mechanism can not only effectively prevent structural damage or failure caused by excessive or insufficient anchoring force, but also extend the service life of the tower and improve its reliability and economy.

[0035] like Figures 4 to 7 As shown, the fixing kit 1 22 and the fixing kit 2 23 are provided with a rotating member 26 for rotational connection, the anchor rod 24 is rotationally connected to the fixing kit 1 22 via the rotating member 26 , and the tension sensor 28 is rotationally connected to the fixing kit 2 23 via the rotating member 26 .

[0036] like Figure 3 and Figure 5As shown, the top and bottom of the positioning steel rod 21 are fixedly connected with a positioning steel frame 16, the top positioning steel frame 16 is connected to the inner wall of the concrete tower 11 through a positioning support frame 17, and the bottom positioning steel frame 16 is connected to the inner wall of the steel tower 12 through a positioning support frame 17.

[0037] like Figures 4 to 6 As shown, the anchor rods 24 are arranged in a plurality of groups distributed in a circular array, the ends of the anchor rods 24 anchoring the concrete tower 11 are connected with connector 2 210, and the ends of the anchor rods 24 anchoring the steel tower 12 are connected with connector 1 29, and both connector 1 29 and connector 2 210 are arranged in an arc structure to adapt to the internal arc shape of the concrete tower 11 and the steel tower 12.

[0038] like Figure 3 and Figure 4 As shown, regarding the specific splicing method of the concrete tower 11 and the steel tower 12, the concrete tower 11 includes a plurality of groups of tower splicing sections 15 that are spliced ​​and installed, and the steel tower 12 includes a steel cylinder connecting section 13 and a steel cylinder 14. The steel tower 12 is installed on the top of the concrete tower 11 through the steel cylinder connecting section 13 at the bottom.

[0039] like Figures 1 to 3 As shown, the tower splicing section 15 is also assembled from a plurality of concrete arc blocks, and the number of groups of anchor rods 24 distributed in a circular array is the same as the number of assembled concrete blocks; for example, the tower splicing section 15 is assembled from four concrete blocks, and then four groups of anchor rods 24 distributed in a circular array are provided, and the same number of anchor rods 24 can provide an inward anchoring force for the tower splicing section 15, so that the tower splicing section 15 has a higher structural strength.

[0040] In summary, the present invention also has the following comprehensive effects:

[0041] Dynamic anchoring force adjustment mechanism: the anchor rod 24 is connected by rotation to form a double-acting lever system. The telescopic action of the hydraulic telescopic rod 27 is transmitted to the end of the anchor rod 24 through the connecting rod 25, and the force is amplified / reduced by the lever ratio. When the tower is deformed by wind load, the tension sensor 28 captures the anchoring force fluctuation in real time and triggers the hydraulic system to perform reverse compensation. Multiple groups of anchor rods 24 in a circular array form a radial force balance network to automatically balance the load differences in different directions.

[0042] Closed-loop feedback control logic, the anchoring component 2 also includes a control system, which includes a perception layer, a decision layer, an execution layer and a verification layer; perception layer: the tension sensor 28 monitors the actual force of each anchor point with a sampling period of 10ms; decision layer: compares the preset anchoring force threshold, calculates the deviation and adjustment direction; execution layer: the hydraulic system accurately adjusts the extension amount (accuracy ±0.1mm), and changes the inclination angle of the anchor rod 24 through the connecting rod 25 mechanism; verification layer: secondary detection of the adjusted force value, forming a closed-loop control to ensure the effectiveness of compensation;

[0043] Adaptive stress distribution reconstruction, the anchor rods 24 of the annular array form 24 independent control units in the circumferential direction, each unit automatically adjusts the tension according to the local strain, so that the interface pressure between the concrete and the steel structure is uniform, and the adjacent units can form a force transmission chain under extreme loads to avoid single-point overload. Modular maintenance design principle, a single anchor rod 24 and its associated components constitute an independent functional module, which can be quickly disassembled and replaced through the rotating part 26 when damaged without destroying the overall structure. The arc-shaped connector is designed to fit the inner wall of the tower, ensuring that the mechanical properties are restored immediately after replacement.

[0044] Prestressed stability is improved, and the dynamic compensation system reduces the fluctuation range of anchoring force. A breakthrough in micro-slip suppression is achieved, and the millisecond-level response of the hydraulic system reduces the slippage of the flange connection surface. The three-dimensional constraint of the positioning steel frame 16 eliminates the millimeter-level displacement accumulation of the traditional structure. Maintenance throughout the life cycle is convenient. Structural safety is enhanced in multiple dimensions. This solution transforms static anchoring into dynamic balance through the integrated design of mechanical adjustment and intelligent feedback. Passive maintenance is transformed into active prevention, and a full-time health monitoring system is established. From overall replacement to module repair: the economic model of tower maintenance is reconstructed.

[0045] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A steel-concrete tower transition connection structure, characterized in that: include: A concrete tower (11) and a steel tower (12), wherein the steel tower (12) is coaxially butt-jointed and installed at the top of the concrete tower (11), wherein an anchoring assembly (2) is arranged inside the steel tower (12), wherein the anchoring assembly (2) comprises a positioning steel rod (21), a fixing kit and an anchoring rod (24), wherein the fixing kit is fixedly sleeved on the positioning steel rod (21), and the anchoring rod (24) is rotatably mounted on the positioning steel rod (21) via the fixing kit, wherein one group of anchoring rods (24) is anchored to the inner side wall of the concrete tower (11), and another group of anchoring rods (24) is anchored to the inner side wall of the steel tower (12), and the two groups of anchoring rods (24) generate an inward anchoring force on the concrete tower (11) and the steel tower (12), thereby ensuring that the butt joint of the concrete tower (11) and the steel tower (12) is firmly connected; A telescopic rod is provided between the positioning steel rod (21) and the anchor rod (24), and the telescopic rod is used to adjust the anchoring force of the anchor rod (24). A tension sensor (28) is provided between the positioning steel rod (21) and the anchor rod (24), and the tension sensor (28) is used to detect in real time the anchoring force of the anchor rod (24) on the concrete tower tube (11) and the steel tower tube (12), thereby monitoring in real time the connection strength of the transition section between the concrete tower tube (11) and the steel tower tube (12).

2. The steel-concrete tower transition connection structure according to claim 1, characterized in that: The fixing kit comprises a fixing kit 1 (22) and a fixing kit 2 (23), wherein the fixing kit 1 (22) and the fixing kit 2 (23) are fixedly mounted on a positioning steel rod (21), and two sets of fixing kit 1 (22) and fixing kit 2 (23) are arranged on the positioning steel rod (21), and the two sets of fixing kit 1 (22) and fixing kit 2 (23) respectively correspond to two sets of anchor rods (24) used for anchoring a concrete tower tube (11) and a steel tower tube (12).

3. The steel-concrete tower transition connection structure according to claim 2, characterized in that: The inner side of the anchor rod (24) is rotatably connected to a connecting rod (25); the tension sensor (28) is connected to the anchor rod (24) via the connecting rod (25); the telescopic rod is a hydraulic telescopic rod (27); the hydraulic telescopic rod (27) is connected to the anchor rod (24) via the connecting rod (25); the inner ends of the hydraulic telescopic rod (27) and the anchor rod (24) are at the same rotatable connection position; the outer ends of the tension sensor (28) are rotatably connected to the connecting rod (25) and the hydraulic telescopic rod (27), respectively.

4. The steel-concrete tower transition connection structure according to claim 3 is characterized in that: The fixing kit one (22) and the fixing kit two (23) are provided with a rotating member (26) for rotational connection, the anchor rod (24) is rotationally connected to the fixing kit one (22) via the rotating member (26), and the tension sensor (28) is rotationally connected to the fixing kit two (23) via the rotating member (26).

5. The steel-concrete tower transition connection structure according to claim 1, characterized in that: The top and bottom of the positioning steel rod (21) are fixedly connected to a positioning steel frame (16); the top positioning steel frame (16) is connected to the inner wall of the concrete tower (11) via a positioning support frame (17); and the bottom positioning steel frame (16) is connected to the inner wall of the steel tower (12) via a positioning support frame (17).

6. The steel-concrete tower transition connection structure according to claim 5, characterized in that: The anchor rods (24) are arranged as a plurality of groups distributed in a circular array, the ends of the anchor rods (24) anchoring the concrete tower (11) are connected to a second connector (210), and the ends of the anchor rods (24) anchoring the steel tower (12) are connected to a first connector (29), and both the first connector (29) and the second connector (210) are arranged as arc structures to adapt to the internal arc shapes of the concrete tower (11) and the steel tower (12).

7. A steel-concrete tower transition connection structure according to any one of claims 1 to 6, characterized in that: The concrete tower (11) comprises a plurality of groups of tower splicing sections (15) which are spliced ​​and installed together; the steel tower (12) comprises a steel cylinder connecting section (13) and a steel cylinder (14); and the steel tower (12) is installed on the top of the concrete tower (11) via the steel cylinder connecting section (13) at the bottom.

8. The steel-concrete tower transition connection structure according to claim 7, characterized in that: The tower splicing section (15) is assembled from four concrete blocks, and four groups of anchor rods (24) distributed in a circular array are provided. The same number of groups of anchor rods (24) can provide inward anchoring force for the tower splicing section (15).

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