External prestressed cable turning device for concrete towers

Abstract

This utility model belongs to the field of wind power generation technology, specifically disclosing an external prestressed cable steering device for concrete towers. It includes a support unit and a steering unit fixedly connected to the support unit. The support unit is fixedly connected to the inner wall of the concrete tower. The steering unit includes an outer ring beam, a middle ring beam, an inner ring beam, multiple first radial beams, and multiple second radial beams. The multiple first radial beams are all located between the outer ring beam and the middle ring beam, with one end of each first radial beam connected to the outer ring beam and the other end connected to the middle ring beam. Each first radial beam has a through hole for steering the prestressed cable. The multiple second radial beams are all located between the middle ring beam and the inner ring beam, with one end of each second radial beam connected to the middle ring beam and the other end connected to the inner ring beam. This utility model's steering device can achieve prestressed cable steering without increasing the circumferential stress of the tower.

Description

Technical Field

[0001] This utility model belongs to the field of wind power generation technology, and specifically discloses an external prestressed cable turning device for concrete towers. Background Technology

[0002] With the rapid development of my country's wind power industry, prestressed concrete towers have provided more possibilities for the large-scale development of wind turbine units. Prestressed concrete tower technology is mainly divided into two types: internal prestressing and external prestressing. External prestressing has a more promising future due to its advantages of prefabrication and simple construction.

[0003] Due to space constraints within the tower, some externally prestressed cables cannot be tensioned in a straight line and need to be turned at a certain height. Existing turning devices often use supports, but turning these supports generates additional loads, increasing the circumferential stress on the tower itself. Circumferential stress often plays a controlling role in the design of concrete towers, directly affecting their stability, durability, and safety. Summary of the Invention

[0004] The purpose of this invention is to provide an external prestressed cable steering device for concrete towers, so as to solve the technical problem that existing steering devices increase the circumferential stress of the tower and affect the stability, durability and safety of the concrete tower.

[0005] This utility model provides an external prestressed cable steering device for concrete towers, including a support unit and a steering unit disposed on the support unit and fixedly connected to the support unit; The support unit is fixedly connected to the inner wall of the concrete tower; The steering unit includes an outer ring beam, a middle ring beam, an inner ring beam, multiple first radial beams, and multiple second radial beams; The plurality of first radial beams are all disposed between the outer ring beam and the middle ring beam, and one end of each first radial beam is connected to the outer ring beam and the other end is connected to the middle ring beam; Each of the first radial beams has a through hole, which is used to deflect the prestressed cable; The plurality of second radial beams are all disposed between the intermediate ring beam and the inner ring beam, and one end of each second radial beam is connected to the intermediate ring beam and the other end is connected to the inner ring beam.

[0006] Preferably, it also includes a steel grating; The steel grating is fixedly installed on the upper surface of the steering unit.

[0007] Preferably, the support unit includes multiple support beams; Each support beam is evenly distributed on the lower surface of the steering unit, and each support beam is fixedly connected to the inner wall of the concrete tower.

[0008] Preferably, the fixed connection is a welded or bolted connection.

[0009] Preferably, the width of the second radial beam is greater than the width of the first radial beam.

[0010] Preferably, the distance between the edge of the through hole and the inner wall of the concrete tower is 0.1m-0.2m.

[0011] Preferably, the diameter of the concrete tower is 5m-7m.

[0012] The external prestressed cable turning device for concrete towers of this utility model has the following advantages compared with the prior art: The external prestressed cable turning device for concrete towers of this utility model can balance the additional force generated by the turning of the prestressed cable, effectively reduce the circumferential stress of the tower, and thus reduce the amount of engineering work. At the same time, the turning device can also serve as a platform for maintenance and rest for operators. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external prestressed cable turning device for concrete towers according to an embodiment of the present invention.

[0014] In the diagram: 1. Concrete tower; 2. Outer ring beam; 3. Middle ring beam; 4. Inner ring beam; 5. First radial beam; 6. Second radial beam; 7. Through hole; 8. Support beam; 9. Embedded parts; 10. Steel grating. Detailed Implementation

[0015] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0016] This utility model provides an external prestressed cable steering device for concrete towers, such as... Figure 1 As shown, it includes a support unit and a steering unit disposed on the support unit and fixedly connected to the support unit; The support unit is fixedly connected to the inner wall of the concrete tower 1.

[0017] The steering unit includes an outer ring beam 2, a middle ring beam 3, an inner ring beam 4, multiple first radial beams 5, and multiple second radial beams 6. The multiple first radial beams 5 are all arranged between the outer ring beam 2 and the middle ring beam 3, and one end of each first radial beam 5 is connected to the outer ring beam 2, and the other end is connected to the middle ring beam 3. Each first radial beam 5 has a through hole 7, which is used to turn the prestressed cable, so that the prestressed cable can be tensioned in a straight line. The multiple second radial beams 6 are all arranged between the middle ring beam 3 and the inner ring beam 4, and one end of each second radial beam 6 is connected to the middle ring beam 3, and the other end is connected to the inner ring beam 4.

[0018] This utility model uses a support unit to support the upper steering unit.

[0019] This invention uses a turning unit composed of an outer ring beam 2, a middle ring beam 3, an inner ring beam 4, multiple first radial beams 5, and multiple second radial beams 6 to turn the prestressed cables of the concrete tower 1, thereby enabling the prestressed cables to be tensioned in a straight line. Furthermore, due to the use of a ring beam structure, the additional load generated by the turning is evenly distributed throughout the entire turning unit, preventing the generation of circumferential stress on the concrete tower 1. This reduces the amount of work required for the concrete tower 1 and solves the problem of existing structures where one prestressed cable corresponds to one turning device, resulting in circumferential stress on the tower and reduced stability, durability, and safety of the concrete tower 1. Simultaneously, due to the use of multiple ring beams, the structure of this invention is more stable compared to structures using a single ring beam and radial beams.

[0020] The steel grating 10, due to its special surface treatment (such as anti-slip texture), effectively prevents slipping accidents in wet or oily environments. The steel grating 10 has a high load-bearing capacity, capable of withstanding large loads, ensuring no deformation or breakage even after prolonged use, making it suitable as a rest platform. The open structure design of the steel grating 10 promotes air circulation, reduces water accumulation, facilitates cleaning, and is highly corrosion-resistant, requiring minimal maintenance and reducing long-term operating costs. Based on these numerous advantages of the steel grating 10, this embodiment of the invention fixes the steel grating 10 to the upper surface of the steering unit, thereby facilitating maintenance and rest for operating personnel. Since the prestressed cable steering device of this invention is used on a concrete tower 1, where the wind is relatively strong, in order to reduce the vibration caused by the wind, the support unit of this invention includes multiple support beams 8; each support beam 8 is evenly arranged on the lower surface of the steering unit, and each support beam 8 is fixedly connected to the inner wall of the concrete tower 1. The structure of multiple support beams 8 allows wind to pass between adjacent support beams 8, avoiding strong vibrations caused by an excessively large contact area with the wind, thus improving the safety of the steering device and extending its service life.

[0021] The method for fixing the support beam 8 to the inner wall of the concrete tower 1 can be welding or bolting. Specifically, by setting an embedded part 9 on the inner wall of the concrete tower 1, the end of the support beam 8 is welded or bolted to the embedded part 9.

[0022] To ensure the load-bearing capacity inside the steering device, in this embodiment of the invention, the width of the second radial beam 6 is greater than the width of the first radial beam 5.

[0023] The diameter of the concrete tower 1 in this embodiment of the present invention is 5m-7m. At the same time, in order to avoid a large deviation in the prestressed cable tensioning angle, the distance between the edge of the through hole 7 and the inner wall of the concrete tower 1 is limited to 0.1m-0.2m.

[0024] The prestressed cable steering device of this utility model can be a prefabricated component. Its installation and use process is as follows: First, during the prefabrication of the concrete tower 1, the embedded parts 9 are pre-embedded into the corresponding positions on the inner wall of the concrete tower 1. Then, in the factory, the outer ring beam 2, the middle ring beam 3, the inner ring beam 4, the first radial beam 5, the second radial beam 6, and the support beam 8 are welded into an integral steel frame. Finally, the steel grating 10 is installed on the steering unit and welded. Before hoisting the concrete tower 1, the support beam 8 is welded or bolted to the embedded parts 9, and then the entire ring section of the concrete tower 1 is hoisted. After hoisting, the prestressed cable is passed through the through hole 7 opened on the first radial beam 5, and finally, the prestressed cable is tensioned to complete the addition of prestress.

[0025] The prestressed cable turning device of this utility model is applied to a concrete tower 1. It can balance the additional force generated by the turning of the prestressed cable, effectively reduce the circumferential stress of the tower, and thus reduce the amount of engineering work. At the same time, the turning device can serve as a platform for maintenance and rest for the operators.

[0026] The above description is only a few embodiments of this utility model and is not intended to limit this utility model in any way. Although this utility model is disclosed above with preferred embodiments, it is not intended to limit this utility model. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this utility model using the disclosed technical content are equivalent to equivalent implementation cases and all fall within the scope of the technical solution.

Claims

1. A steering device for externally prestressed cables in concrete towers, characterized in that, It includes a support unit and a steering unit disposed on the support unit and fixedly connected to the support unit; The support unit is fixedly connected to the inner wall of the concrete tower; The steering unit includes an outer ring beam, a middle ring beam, an inner ring beam, multiple first radial beams, and multiple second radial beams; The plurality of first radial beams are all disposed between the outer ring beam and the middle ring beam, and one end of each first radial beam is connected to the outer ring beam and the other end is connected to the middle ring beam; Each of the first radial beams has a through hole, which is used to deflect the prestressed cable; The plurality of second radial beams are all disposed between the intermediate ring beam and the inner ring beam, and one end of each second radial beam is connected to the intermediate ring beam and the other end is connected to the inner ring beam.

2. The external prestressed cable turning device for concrete towers according to claim 1, characterized in that, It also includes steel grating; The steel grating is fixedly installed on the upper surface of the steering unit.

3. The external prestressed cable turning device for concrete towers according to claim 1, characterized in that, The support unit includes multiple support beams; Each support beam is evenly distributed on the lower surface of the steering unit, and each support beam is fixedly connected to the inner wall of the concrete tower.

4. The external prestressed cable turning device for concrete towers according to claim 3, characterized in that, The fixed connection is either welded or bolted.

5. The external prestressed cable turning device for concrete towers according to claim 1, characterized in that, The width of the second radial beam is greater than the width of the first radial beam.

6. The external prestressed cable turning device for concrete towers according to claim 1, characterized in that, The distance between the edge of the through hole and the inner wall of the concrete tower is 0.1m-0.2m.

7. The external prestressed cable turning device for concrete towers according to claim 6, characterized in that, The diameter of the concrete tower is 5m-7m.

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