Cable-stayed cable capable of releasing torsional stress

Abstract

The utility model relates to bridge engineering technical field especially discloses the cable-stayed cable that can release torsional stress. The device includes sheath pipe, hoop, spring, flange and dust cover. It releases circumferential rotation degree of freedom through the accurate adaptation of cross convex guide rail and guide groove, and the spring fixed coaxially with the welding station cooperates and releases torsional stress high -efficiently absorbs, has solved the sheath pipe cracking, anchor tool loosening and other hidden danger of traditional cable-stayed cable because of stress accumulation from the root; at the same time, the double protection structure of dust cover bottom interference clamping and top hoop locking, the sealing effect of collocation antiskid washer can block rainwater impurity invasion to avoid part jamming corrosion, realize the demand of maintenance heartless. The utility model solves the sheath pipe cracking, anchor tool loosening and other structural hidden danger of traditional cable-stayed cable because of torsional stress accumulation, and the technical problem that part torsion control device structure is complicated and leads to high production and construction cost, poor protection reliability and maintenance trouble.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a stay cable that can release torsional stress. Background Technology

[0002] As a core load-bearing component of bridge structures, the operational stability of stay cables directly determines the safety of bridge operation. Torsional stress accumulation is a key issue leading to fatigue damage and shortened service life of stay cables. Our years of research have revealed that traditional stay cables rely heavily on rigid connection structures to transfer stress, lacking targeted torsional release designs. Under tensioning construction and long-term wind loads and vehicle vibrations, this can easily lead to problems such as sheath cracking and anchor loosening. This not only increases after-sales maintenance costs but also damages the company's reputation in the engineering field.

[0003] Currently, some torsion control devices on the market have obvious design flaws: some use complex bearing or ball joint structures, which require high machining precision, resulting in low production efficiency, and the rotational freedom is easily affected by component compatibility issues during assembly; some have basic stress relief functions, but the sealing of the connection parts is poor, and in harsh environments such as coastal areas and rainy areas, impurities can easily enter and cause internal components to jam, reducing the reliability of the device; others have simple protective structures, and after long-term use, components are prone to corrosion, increasing the replacement costs for bridge maintenance, which contradicts our production philosophy of pursuing high cost performance and long service life.

[0004] Driven by the core needs of downstream construction companies for convenient installation and hassle-free maintenance of stay cables, and by the inherent requirements of enterprises to enhance product competitiveness, the development of a simple and highly adaptable torsional stress relief device became imperative. The shortcomings of existing technologies prompted us to focus on the sheath tube as the core carrier, starting from practical production considerations. By optimizing the connection structure and protective design, we achieved efficient torsional stress relief while ensuring stable tensile force transmission, thus solving the pain points of traditional products. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a stay cable that can release torsional stress, solving the structural problems of traditional stay cables, such as sheath cracking and anchor loosening due to the accumulation of torsional stress, as well as the technical problems of complex structures of some torsion control devices leading to high production, sales and construction costs, poor protection reliability and troublesome maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The cable-stayed cable that can release torsional stress includes a sheath tube, clamps, springs, flanges and dust covers. The bottom of the sheath tube is integrally formed with a welding platform. Four guide grooves are opened along the axial direction inside the sheath tube. The side of the welding platform facing the inside of the sheath tube is provided with a cross-shaped protruding guide rail. The protruding guide rail and the guide groove are matched one by one.

[0008] One end of the spring is fixedly connected to the welding table, and the other end is welded to the sheath tube. The welding table has eight threaded holes and one bolt. The flange is detachably connected to the welding table through the bolt. An anti-slip washer is installed between the flange and the welding table. The bolt passes through the anti-slip washer and is fixedly connected to the flange. The circumferential rotational freedom is ensured by the adaptation of the guide groove and the raised guide rail. The elastic deformation of the spring efficiently absorbs and releases torsional stress, while ensuring stable transmission of tension.

[0009] Preferred design: The welding table has an annular groove, the bottom of the dust cover is engaged with the groove, and the top of the dust cover has two semi-circular clamps. The clamps are fastened to the outside of the protective sleeve and the two clamps are locked with bolts to achieve double stable fixation of the dust cover, effectively preventing external impurities from entering the device and extending the service life of the core components.

[0010] Preferred configuration: Eight threaded holes are evenly distributed around the circumference of the welding table, bolt one is a high-strength bolt, and bolt one corresponds to threaded hole one, so that the flange and welding table are connected under balanced force, improving the load-bearing stability and anti-loosening ability of the connection structure.

[0011] Preferred option: The anti-slip washer has a through hole corresponding to the bolt, ensuring that the bolt can be smoothly installed, while also enhancing the fit and sealing between the flange and the welding station, and preventing the connection from loosening.

[0012] Preferred: The clamp is a semi-circular steel structure, which increases the clamping force on the protective sleeve, ensuring that the top of the dust cover is reliably fixed and not easily displaced due to vibration or external force.

[0013] Preferred design: The bottom of the dust cover is provided with an annular locking platform that fits the groove. The annular locking platform and the groove are press-fitted together, which strengthens the connection between the dust cover and the welding station, prevents it from falling off during use, and ensures the continuous and stable protective effect.

[0014] Preferably, the fixed connection between the spring and the welding station is collinear with the central axis of the welding station, so that the spring is subjected to uniform force, avoiding local stress concentration, and further improving the stability and reliability of torsional stress absorption and release.

[0015] Preferred design: The cross-shaped raised guide rail is integrally formed with the welding table. The height of the raised guide rail is matched with the depth of the guide groove, and the width is matched with the width of the guide groove. This improves the structural strength of the raised guide rail. The clearance matching design reduces rotational resistance and ensures a smooth and efficient torsional stress release process.

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

[0017] This torsional stress-relieving cable-stayed bridge uses a sheath tube as its core. Through a precise fit between a cross-shaped protruding guide rail and a guide groove, it releases circumferential rotational freedom. Combined with a spring coaxially fixed to the welding table, it efficiently absorbs and releases torsional stress, fundamentally solving the problems of sheath tube cracking and anchor loosening caused by stress accumulation in traditional cable-stayed bridges. This extends product lifespan and reduces after-sales maintenance costs. It abandons complex bearing or ball joint structures, adopting a conventional component combination design. Processing and assembly are more suited to mass production, effectively improving production efficiency and reducing production and sales costs. Installation requires no special tooling, greatly simplifying the construction process. Simultaneously, the dual protective structure of the dust cover—an interference fit at the bottom and a locking clamp at the top—along with the sealing effect of anti-slip washers, prevents rainwater and impurities from entering, avoiding component jamming and corrosion, thus meeting the need for worry-free maintenance. This aligns with the company's production philosophy of high cost-effectiveness and long lifespan, and precisely matches the core demands of downstream construction and maintenance parties, significantly enhancing the product's market competitiveness and the company's brand reputation. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a structural diagram of the present invention in its conventional use form;

[0020] Figure 2 This is a cross-sectional view of the sheath tube of this utility model;

[0021] Figure 3 This is a structural diagram of the welding station of this utility model;

[0022] Figure 4 This is a structural diagram of the anti-slip washer of this utility model.

[0023] Legend: 1. Sheath; 2. Clamp; 3. Guide groove; 4. Raised guide rail; 5. Spring; 6. Welding table; 7. Flange; 8. Groove; 9. Bolt 1; 10. Anti-slip washer; 11. Bolt 2. Detailed Implementation

[0024] This application provides a stay cable that can release torsional stress, effectively solving the structural problems of traditional stay cables, such as sheath cracking and anchor loosening due to the accumulation of torsional stress, as well as the technical problems of complex structures of some torsion control devices, resulting in high production, sales and construction costs, poor protection reliability and troublesome maintenance.

[0025] Example

[0026] like Figure 1 , Figure 2 , Figure 3and Figure 4 As shown, the technical solution in this application embodiment effectively solves the structural problems of traditional cable stays, such as sheath cracking and anchor loosening due to the accumulation of torsional stress, as well as the technical problems of complex structures of some torsion control devices leading to high production, sales and construction costs, poor protection reliability and troublesome maintenance. The overall idea is as follows:

[0027] Spring 5 is fixed to welding table 6: Connect one end of spring 5 to the preset fixed position of welding table 6 to ensure that the connection is firm and that the connection point is collinear with the central axis of welding table 6, so as to lay the foundation for uniform force distribution in the future.

[0028] Assembly of anti-slip washer 10 and flange 7: Lay the anti-slip washer 10 flat between the mating surfaces of welding table 6 and flange 7, align the through hole of anti-slip washer 10 with the eight threaded holes of welding table 6, and ensure that bolt 9 can be smoothly installed.

[0029] Fastening flange 7 to welding table 6: Pass bolts 9 one by one through the through holes of anti-slip washers 10 and the corresponding mounting holes of flange 7, and screw them into the evenly distributed threaded holes of welding table 6. Tighten them gradually in a symmetrical circumferential order to make flange 7 and welding table 6 fit tightly together, thereby enhancing the connection sealing and anti-loosening ability.

[0030] Dust cover bottom fixing: Align the annular locking plate at the bottom of the dust cover with the annular groove 8 of the welding station 6, and press the locking plate into the groove 8 using an interference fit to ensure a tight connection at the bottom of the dust cover and prevent it from falling off.

[0031] Fixing the clamps 2 to the top of the dust cover: Install the two semi-circular steel clamps 2 on the corresponding positions on the outside of the protective sleeve 1, align the ear plate mounting holes of the clamps 2, insert bolts 11 and tighten them, so that the clamps 2 firmly clamp the protective sleeve 1, thereby achieving a stable fixation of the top of the dust cover and forming a double protection structure.

[0032] Installation with the main body and anchorage of the cable: The sheath 1, after the core components and protective structure have been assembled, is fitted along the axis of the main body of the cable to the preset installation position, ensuring that the sheath 1 does not affect the axial force of the main body of the cable; the side of the flange 7 away from the welding table 6 is aligned with the preset connection structure of the bridge anchorage, and fixed with matching connectors to ensure that the axial tension of the cable can be stably transmitted to the anchorage through the welding table 6 and the flange 7; during the installation process, the sheath 1 is kept coaxial with the main body of the cable to avoid abnormal fit between the guide groove 3 and the raised guide rail 4 due to installation misalignment, which would affect the circumferential rotational freedom.

[0033] Verification of rotational freedom: Manually push the sheath tube 1 and observe its circumferential rotation around the cross-shaped protruding guide rail 4 of the welding table 6 to ensure that the guide groove 3 and the protruding guide rail 4 are in smooth fit without jamming, thus ensuring the basic conditions for the release of torsional stress.

[0034] Connection tightness test: Check the tightening status of bolt 9 and bolt 11, and verify the tightening torque with a torque wrench to ensure that the flange 7 and welding table 6, and the clamp 2 and sheath 1 are firmly connected and there is no risk of loosening.

[0035] Protective sealing inspection: Observe the fit between the dust cover and the groove 8 of the welding table 6 and the protective sleeve 1 to ensure that there are no gaps and that it can effectively block external impurities from entering the device and ensure the service life of the core components.

[0036] Stress release simulation test: A slight torsional force was applied to the cable using a small tensioning device, and the elastic deformation and reset of spring 5 were observed. This confirmed that the torsional stress could be absorbed and released by spring 5, and that the device function met the design requirements.

[0037] Working principle:

[0038] Stress transfer and rotational freedom protection: The torsional stress generated by the stay cable under tension, operation, or environmental loads is directly transferred to the sheath tube 1. The four guide grooves 3 inside the sheath tube 1 are precisely matched with the cross-shaped raised guide rails 4 of the welding table 6. The radial displacement between the sheath tube 1 and the welding table 6 is limited by the clearance fit to avoid structural displacement, while the circumferential rotational freedom is fully released, providing the basic conditions for the release of torsional stress.

[0039] The core process of torsional stress absorption and release: One end of spring 5 is fixed to welding table 6, and the fixed connection is collinear with the central axis of welding table 6 to ensure that spring 5 is subjected to uniform force during torsional stress transmission. When the sheath tube 1 tends to twist with the cable, it will drive the welding table 6 to generate a circumferential force synchronously. This force is directly transmitted to spring 5, causing spring 5 to undergo elastic deformation, converting torsional mechanical energy into elastic potential energy, and realizing the initial absorption of torsional stress. When the torsional external force weakens or disappears, the elastic restoring force of spring 5 will drive sheath tube 1 and welding table 6 to rotate in opposite directions, releasing the stored elastic potential energy, completing the efficient release of torsional stress, and avoiding stress accumulation inside the structure.

[0040] To ensure load-bearing stability and connection reliability: Flange 7 is detachably connected to the welding table 6 via eight evenly distributed threaded holes on bolt 9. Bolt 9 passes through anti-slip washer 10 to achieve a tight fit between flange 7 and welding table 6. This ensures that the axial tension of the stay cable is stably transmitted to the anchoring end through welding table 6 and flange 7, while the anti-slip washer 10 enhances the frictional resistance of the connection, preventing loosening during tension transmission or torsion. Simultaneously, the steel semi-circular clamp 2, locked by bolt 11, and the interference fit structure at the bottom of the dust cover form a double fixation, preventing the dust cover from falling off and effectively blocking external impurities from entering the device. This prevents wear or jamming of core components such as guide groove 3 and spring 5, ensuring smooth rotation and stress release processes over the long term.

[0041] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A stay cable capable of releasing torsional stress, comprising a sheath (1), a clamp (2), a spring (5), a flange (7), and a dust cover, characterized in that, The bottom of the sheath tube (1) is integrally formed with a welding platform (6). Four guide grooves (3) are opened along the axial direction inside the sheath tube (1). The welding platform (6) is provided with a cross-shaped protruding guide rail (4) on the side facing the inside of the sheath tube (1). The protruding guide rail (4) and the guide groove (3) are matched one-to-one. One end of the spring (5) is fixedly connected to the welding table (6), and the other end is welded to the sheath tube (1). The welding table (6) has eight threaded holes and one bolt (9) pre-set. The flange (7) is detachably connected to the welding table (6) by bolt (9), and an anti-slip washer (10) is installed between the flange (7) and the welding table (6). Bolt (9) passes through the anti-slip washer (10) and is fixedly connected to the flange (7).

2. The cable-stayed bridge with releasable torsional stress as described in claim 1, characterized in that, The welding table (6) has an annular groove (8), the bottom of the dust cover is engaged with the groove (8), and the top of the dust cover has two semi-circular clamps (2). The clamps (2) are clamped on the outside of the sheath tube (1), and the two clamps (2) are locked and fixed by bolts two (11).

3. The stay cable with releasable torsional stress as described in claim 1, characterized in that, Eight threaded holes are evenly distributed around the circumference of the welding table (6). Bolt 1 (9) is a high-strength bolt, and bolt 1 (9) is matched with threaded hole 1.

4. The cable-stayed bridge with releasable torsional stress as described in claim 1, characterized in that, The anti-slip washer (10) has a through hole corresponding to the bolt (9).

5. The cable-stayed bridge with releasable torsional stress as described in claim 1, characterized in that, The clamp (2) is a steel semi-circular structure.

6. The cable-stayed bridge with releasable torsional stress as described in claim 1, characterized in that, The bottom of the dust cover is provided with an annular locking platform that fits the groove (8), and the annular locking platform and the groove (8) are interference-fitted.

7. The cable-stayed bridge with releasable torsional stress as described in claim 1, characterized in that, The cross-shaped raised guide rail (4) and the welding table (6) are integrally formed. The height of the raised guide rail (4) is matched with the depth of the guide groove (3), and the width is matched with the width of the guide groove (3).

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