A short tower cable-stayed bridge cable saddle

Abstract

The utility model provides a low tower cable -stayed bridge cable saddle relates to bridge cable saddle technical field, including protection cylinder and connecting cylinder, still include clamping piece, set up in one end outside of connecting cylinder, clamping jaw, set up in one end outside of connecting cylinder, be used for clamping limit to protection cylinder, connecting piece, set up in the outside of protection cylinder, through annular groove continuous pull clamping jaw one end, and then self -adaptation increases the clamping force of clamping jaw. The core advantage of this characteristic is that, need not manual intervention or additional driving device, can according to actual tension size dynamic adjustment clamping force, the greater the tension, the clamping force of clamping jaw is automatically enhanced, can effectively avoid the risk of connection slackening or falling off due to tension fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of bridge cable saddle technology, and in particular to a cable saddle for a low-tower cable-stayed bridge. Background Technology

[0002] The cable saddle in a low-tower cable-stayed bridge is a key component that supports and guides the stay cables. It has a saddle-shaped structure, is mostly made of steel, and is installed at the top of the bridge tower and both ends of the main girder. With the help of BIM (Building Information Modeling) technology, the cable saddle can be digitally managed throughout its entire lifecycle: In the design phase, a three-dimensional parametric model is created using BIM to visualize and optimize the structural details and stress paths of the cable saddle, ensuring its core function of efficiently transmitting cable tension, positioning the cable body, and adapting to structural deformation. In the construction phase, the BIM model is used for virtual construction and clash detection, precisely guiding the installation and positioning of the cable saddle and reducing rework caused by design conflicts. Its compact structure, concentrated stress on the vertical component, and easier maintenance due to the lower tower height, combined with the support of BIM technology, allow for more intuitive simulation of its mechanical properties during the design phase, optimizing design details such as replaceability.

[0003] A search revealed that Chinese patent CN212895916U discloses a cable saddle for a low-tower cable-stayed bridge with a single-sided bidirectional anti-slip key device. The saddle includes a base with screw holes at each of its four corners, a fixing plate on the back, a protective cylinder, a cable groove inside the protective cylinder, and axially arrayed oblique fixing ribs. The saddle base also contains several cable holes. This design enables single-cable replacement for low-tower cable-stayed bridges, with each strand achieving individual anti-slip protection, thus solving the problem of difficult single-cable replacement in the later stages of bridge operation.

[0004] In the aforementioned device, the cable saddle base and the fixing plate are connected by multiple bolts, and there is a lack of a second protective mechanism. The multiple bolt connections need to be disassembled and reassembled one by one, which is time-consuming and labor-intensive. This is especially inconvenient to operate in high-altitude or complex environments on bridges, prolongs maintenance time, increases labor costs, and may affect the normal operation of the bridge. Relying solely on the bolt connection as a single force path, if the bolts break or loosen due to vibration, fatigue, or corrosion, it can easily lead to the cable saddle base separating from the fixing plate, causing safety hazards such as cable positioning failure and interruption of cable force transmission. Utility Model Content

[0005] The purpose of this utility model is to provide a cable saddle for a low-tower cable-stayed bridge, which can solve the problems of the above-mentioned devices where the cable saddle base and fixing plate are connected by multiple bolts and lack a second protection mechanism. The multiple bolt connections need to be disassembled and assembled one by one, which is time-consuming and labor-intensive. This is especially inconvenient to operate in high-altitude or complex environments, prolongs maintenance time, increases labor costs, and may affect the normal operation of the bridge. Relying solely on bolt connections as a single force path, if the bolts break or loosen due to vibration, fatigue, or corrosion, it can easily lead to the cable saddle base separating from the fixing plate, causing safety hazards such as cable positioning failure and interruption of cable force transmission.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a cable saddle for a low-tower cable-stayed bridge, comprising a protective cylinder and a connecting cylinder, and further comprising:

[0007] A clamping element is disposed on the outer side of one end of the connecting cylinder;

[0008] The gripper is located on the outer side of one end of the connecting cylinder and is used to clamp and limit the protective cylinder.

[0009] A connector is provided on the outside of the protective cylinder;

[0010] The compression ring is slidably positioned on the outside of the protective cylinder.

[0011] In a preferred embodiment, the clamping member includes:

[0012] A connecting disc is fixedly disposed on the outer side of one end of the connecting cylinder, and the outer side of the gripper is connected to the inner side of the connecting disc;

[0013] A limiting ring is fixedly installed on the outer side of the top end of the connecting cylinder;

[0014] An annular groove is formed inside the limiting ring, and the end of the gripper is located inside the annular groove.

[0015] In a preferred embodiment, a cable saddle base is fixedly provided on the outer side of one end of the protective cylinder, and the cable saddle base is located on the inner side of the end of the gripper.

[0016] In a preferred embodiment, a threaded groove is provided on the inner side of the top of the connecting plate, and the outer side of the cable saddle base is connected to the connecting plate through the threaded groove.

[0017] In a preferred embodiment, a washer is fixedly provided on the outer side of one end of the limiting ring, and the washer is made of rubber.

[0018] In a preferred embodiment, the gripper has an L-shaped structure, and the end of the gripper is provided with a protrusion for limiting the position of the protective cylinder.

[0019] In a preferred embodiment, the connector includes:

[0020] A friction ball is rotatably mounted on the inner side of the end of the compression ring to reduce friction with the cable saddle base.

[0021] In a preferred embodiment, the connector includes an auxiliary handle fixedly disposed on the outer side of the compression ring for limiting the compression ring.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] In this invention, when the protective cylinder and the connecting cylinder are subjected to opposite pulling forces, the connecting cylinder will cause the limiting ring to move further away from the protective cylinder, continuously pulling one end of the gripper through the annular groove, thereby adaptively increasing the gripping force of the gripper. The core advantage of this feature is that it can dynamically adjust the gripping force according to the actual pulling force without manual intervention or additional driving devices. The greater the pulling force, the stronger the gripping force of the gripper will be, which can effectively avoid the risk of loosening or falling off the connection due to the fluctuation of the pulling force, improve the reliability and stability of the cable saddle connection, and is especially suitable for the stress requirements of bridge structures under dynamic loads such as vehicle loads and environmental loads. The adaptive adjustment mechanism ensures structural safety and reduces maintenance costs and safety hazards. Attached Figure Description

[0024] Figure 1 A front view structural schematic diagram of a cable saddle for a low-tower cable-stayed bridge provided by this utility model;

[0025] Figure 2 A schematic diagram of the friction ball and assist handle in the cable saddle of a low-tower cable-stayed bridge provided by this utility model;

[0026] Figure 3 A schematic diagram of the threaded groove and washer in the cable saddle of a low-tower cable-stayed bridge provided by this utility model;

[0027] Figure 4 An exploded view of a cable saddle for a low-tower cable-stayed bridge provided for this utility model.

[0028] Legend:

[0029] 1. Protective cylinder; 2. Connecting cylinder; 3. Gripper; 301. Connecting disc; 302. Limiting ring; 303. Annular groove; 304. Cable saddle base; 305. Threaded groove; 306. Washer; 4. Compression ring; 401. Friction ball; 402. Power assist handle. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1:

[0032] Please see Figures 1-4 This embodiment provides a cable saddle for a short-tower cable-stayed bridge used for quick connection of the protective cylinder 1 and the connecting cylinder 2. The specific idea is as follows:

[0033] The cable saddle for the low-tower cable-stayed bridge includes a protective cylinder 1 and a connecting cylinder 2. In addition, the cable saddle for the low-tower cable-stayed bridge also includes a clamp 3, which is disposed on the outer side of the end of the protective cylinder 1 and is used to quickly clamp and limit the protective cylinder 1.

[0034] In order to achieve the clamping function of the gripper 3, this embodiment provides a clamping component that can drive the gripper 3 to rotate and clamp, so as to achieve the effect that the greater the pulling force on the protective cylinder 1, the greater the clamping force.

[0035] In this embodiment, the clamping component includes: a connecting disc 301 movably connected to the outer side of the end of the connecting cylinder 2, wherein a limiting ring 302 is fixedly connected to the outer side of one end of the connecting cylinder 2, the limiting ring 302 is disposed on the inner side of the connecting disc 301, and an annular groove 303 is opened on the outer periphery of the limiting ring 302; a gripper 3 is rotatably connected to the inner side of the through groove opened at the end of the connecting disc 301, that is, it can rotate inward or outward; one end of the gripper 3 is disposed on the inner side of the annular groove 303 opened at the limiting ring 302; a cable saddle base 304 is fixedly connected to the outer side of one end of the protective cylinder 1, and the outer side of the cable saddle base 304 is threadedly connected to the threaded groove 305 opened at the connecting disc 301; and a washer 306 is fixedly connected to the end of the limiting ring 302. The washer 306 is made of rubber and is used to buffer the connecting part and reduce friction.

[0036] The gripper 3 has an L-shaped structure and a protrusion at its end, which can be engaged with one side of the cable saddle base 304 at the end of the protective cylinder 1 to limit the movement of the protective cylinder 1.

[0037] In the specific implementation process, when the user connects the protective cylinder 1 to the connecting cylinder 2, the cable saddle base 304 at the end of the protective cylinder 1 can be placed inside the connecting plate 301. At this time, the connecting plate 301 is threadedly connected to the cable saddle base 304 through the threaded groove 305, thereby driving the cable saddle base 304 to rotate into the inner side of the connecting plate 301. At the same time, the washer 306 pushes the limiting ring 302, causing the limiting ring 302 to move away from the protective cylinder 1, thereby actuating one end of the clamping claw 3. On the side, the other end of the gripper 3 is driven to clamp inward, so that the protrusion at the end of the gripper 3 is engaged with one side of the cable saddle base 304. At this time, since the limiting ring 302 is fixedly connected to the connecting cylinder 2, the protective cylinder 1 is threadedly connected to the connecting plate 301 through the cable saddle base 304. When the protective cylinder 1 and the connecting cylinder 2 are subjected to opposite pulling forces, the connecting cylinder 2 will continue to drive the limiting ring 302 away from the protective cylinder 1, and then continue to pull one end of the gripper 3 through the annular groove 303, increasing the clamping force of the gripper 3.

[0038] Example 2:

[0039] like Figures 1-2 As shown, based on Embodiment 1, this embodiment also provides a device for reducing the clamping stress between the protective cylinder 1 and the gripper 3, facilitating the disassembly of the protective cylinder 1. The specific idea is as follows:

[0040] The cable saddle of the low-tower cable-stayed bridge is equipped with a connector. It is kept relatively stationary only by the compression ring 4 and the clamp 3. The protective cylinder 1 can be disassembled by rotating the protective cylinder 1 and the cable saddle base 304. The connector includes a friction ball 401, which is rotatably connected to the inner side of the end of the compression ring 4 to reduce the friction between the end of the compression ring 4 and the upper surface of the cable saddle base 304. At the same time, the compression ring 4 is also rotatably connected to the outer side of the protective cylinder 1. An assist handle 402 is fixedly connected to the outer side of the top of the compression ring 4 for gripping assistance.

[0041] In practice, the user can clamp the claw 3 on the outer side of the protrusion at the end of the compression ring 4. When the user needs to disassemble the protective cylinder 1, the user can hold the assist handle 402 to keep the compression ring 4 and the claw 3 stationary, and at the same time rotate the protective cylinder 1 and the cable saddle base 304 to release the threaded connection between the cable saddle base 304 and the connecting plate 301. While rotating, the user can continuously push the connecting cylinder 2 toward the direction of the connecting plate 301. The limiting ring 302 gradually loses its pulling force on the end of the claw 3. At the same time, multiple friction balls 401 convert the surface contact between the compression ring 4 and the upper surface of the cable saddle base 304 into point contact, further reducing friction, so that the compression ring 4 can be easily disassembled.

[0042] Working principle:

[0043] Based on Embodiment 1, when the user connects the protective cylinder 1 to the connecting cylinder 2, and places the cable saddle base 304 at the end of the protective cylinder 1 inside the connecting plate 301, the connecting plate 301 and the cable saddle base 304 are threadedly connected through the threaded groove 305, causing the cable saddle base 304 to rotate into the inner side of the connecting plate 301. At the same time, the washer 306 pushes the limiting ring 302 away from the protective cylinder 1, and the outer side of one end of the clamping claw 3 is moved so that the other end clamps inward, so that the protrusion at the end of the clamping claw 3 engages with one side of the cable saddle base 304. The limiting ring 302 is fixedly connected to the connecting cylinder 2, and the protective cylinder 1 is threadedly connected to the connecting plate 301 through the cable saddle base 304. In this structure, when the protective cylinder 1 and the connecting cylinder 2 are subjected to opposite pulling forces, the connecting cylinder 2 will drive the limiting ring 302 further away from the protective cylinder 1, and continuously pull one end of the clamping claw 3 through the annular groove 303, thereby adaptively increasing the clamping force of the clamping claw 3. The core advantage of this feature is that it can dynamically adjust the clamping force according to the actual tension without manual intervention or additional driving device. The greater the tension, the stronger the clamping force of the clamp 3 will be, which can effectively avoid the risk of loosening or falling off due to tension fluctuations, improve the reliability and stability of the cable saddle connection, and is especially suitable for the stress requirements of bridge structures under dynamic loads such as vehicle loads and environmental loads. The adaptive adjustment mechanism ensures structural safety and reduces maintenance costs and safety hazards.

[0044] Based on Embodiment 2, the rotating protective cylinder 1 and the cable saddle base 304 are disconnected from the threaded connection with the connecting disc 301. Simultaneously, the connecting cylinder 2 is pushed towards the connecting disc 301, causing the limiting ring 302 to gradually lose its tension on the end of the gripper 3. The disassembly force is transmitted and released through mechanical linkage. At the same time, multiple friction balls 401 convert the surface contact between the compression ring 4 and the cable saddle base 304 into point contact, significantly reducing the friction of the contact surface. These designs eliminate the need for complex tools or additional external force during disassembly. Through the linkage operation of rotation and pushing and the optimization of the contact form, the disassembly is made convenient and efficient, shortening maintenance time and reducing the difficulty of manual operation. It is especially suitable for the rapid disassembly needs of bridge cable saddles in maintenance or replacement scenarios.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A cable saddle for a low-tower cable-stayed bridge, comprising a protective sleeve (1) and a connecting sleeve (2), characterized in that: Also includes: A clamping element is disposed on the outer side of one end of the connecting cylinder (2); The gripper (3) is located on the outside of one end of the connecting cylinder (2) and is used to clamp and limit the protective cylinder (1); A connector is provided on the outside of the protective cylinder (1); The compression ring (4) is slidably disposed on the outside of the protective cylinder (1).

2. The cable saddle for a low-tower cable-stayed bridge according to claim 1, characterized in that: The clamping element includes: A connecting disc (301) is fixedly disposed on the outer side of one end of the connecting cylinder (2), and the outer side of the gripper (3) is connected to the inner side of the connecting disc (301); A limiting ring (302) is fixedly disposed on the outer side of the top end of the connecting cylinder (2); An annular groove (303) is formed inside the limiting ring (302), and the end of the gripper (3) is located inside the annular groove (303).

3. The cable saddle for a low-tower cable-stayed bridge according to claim 2, characterized in that: A cable saddle base (304) is fixedly installed on the outer side of one end of the protective cylinder (1), and the cable saddle base (304) is located on the inner side of the end of the gripper (3).

4. A cable saddle for a low-tower cable-stayed bridge according to claim 3, characterized in that: The inner side of the top of the connecting plate (301) is provided with a threaded groove (305), and the outer side of the cable saddle base (304) is connected to the connecting plate (301) through the threaded groove (305).

5. A cable saddle for a low-tower cable-stayed bridge according to claim 2, characterized in that: A washer (306) is fixedly provided on the outer side of one end of the limiting ring (302), and the washer (306) is made of rubber.

6. A cable saddle for a low-tower cable-stayed bridge according to claim 1, characterized in that: The gripper (3) has an L-shaped structure, and the end of the gripper (3) is provided with a protrusion for limiting the protective cylinder (1).

7. A cable saddle for a low-tower cable-stayed bridge according to claim 3, characterized in that: The connector includes: Friction ball (401) is rotatably disposed on the inner side of the end of the compression ring (4) to reduce the friction between it and the cable saddle base (304).

8. A cable saddle for a low-tower cable-stayed bridge according to claim 7, characterized in that: An assist handle (402) is fixedly provided on the outer side of the compression ring (4) for limiting the compression ring (4).

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