A type of combined cable clamp structure for suspension bridges
By designing a combined cable clamp structure for suspension bridges, the suspending cable force is applied directly to the upper half of the cable clamp, solving the problems of stress relaxation and slippage, simplifying casting and processing, reducing costs and construction difficulty, and ensuring the stability and safety of the bridge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DEYANG TIANYUAN HEAVY IND
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-03
AI Technical Summary
Existing suspension bridge cable clamp structures are prone to stress relaxation and slippage during long-term use, affecting bridge stability. At the same time, they are difficult and costly to cast and process, and the on-site construction is complicated.
It adopts a detachable suspension bridge combined cable clamp structure, with the upper half, lower half and ear plate of the cable clamp designed separately. The sling force is directly applied to the upper half of the cable clamp, and the screw only provides clamping force. Stable force transmission is achieved through bolt connection, which simplifies the casting and machining process.
It improves the service life of cable clamp bolts and bridge stability, reduces casting defects and production costs, simplifies the construction process, and improves installation efficiency and safety.
Smart Images
Figure CN224451380U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of suspension bridge cable clamp technology, specifically to a combined cable clamp structure for suspension bridges. Background Technology
[0002] Suspension bridges, as a common and important type of bridge structure, exhibit unique advantages when spanning large distances and are widely used in modern transportation infrastructure construction. The cable clamps in suspension bridges, as key load-bearing components connecting the main cable and the suspenders, play a crucial role. They are the critical nodes that transfer the bridge deck load to the main cable via the suspenders, and their performance directly affects the overall safety and durability of the bridge.
[0003] Currently, cable clamps are secured to the main cable during construction using high-strength bolt assemblies. The tension of the bolts ensures the clamp holds the cable tightly. In existing pin-type cable clamp structures, the clamp lugs are directly cast into the lower half of the clamp. In this structure, the bridge deck load is transmitted through the suspenders to the lower lugs of the clamp, and then to the clamp bolts. Because the clamp bolts must not only provide the clamping force but also bear the tension of the suspenders, they are under complex stress conditions for extended periods.
[0004] In practical applications, cable clamps can experience stress relaxation under long-term loads. This is because the cable clamps bear the combined forces of the cable tension and the clamping force over a long period. As time passes, the microstructure of the material changes, leading to a gradual decrease in stress. Stress relaxation can cause the clamps to slip, affecting the force transmission path between the main cable and the suspenders, altering the stress state of the bridge, and threatening its stability. Once the clamps slip, the connection between the main cable and the suspenders will be affected, potentially leading to uneven local stress distribution and even damage to the bridge structure.
[0005] Furthermore, the current integrated structure of the cable clamp lugs and the lower half of the clamp presents significant challenges to its casting and machining. The shape and structure of the lower half are quite complex. During casting, the integral molding of the lugs and the lower half makes the flow and filling of molten metal more difficult, increasing the likelihood of casting defects such as porosity and inclusions. Machining requires precise processing of the complex structure to ensure dimensional accuracy and surface quality, placing extremely high demands on machining equipment and processes, making it difficult to guarantee quality and precision. Moreover, the integrated structure requires specialized molds and processes, increasing production costs and processing time, which is detrimental to the large-scale manufacturing of cable clamps. Utility Model Content
[0006] The present invention aims to overcome the shortcomings of the prior art and provide a combined cable clamp structure for suspension bridges.
[0007] The technical solution adopted in this utility model is as follows:
[0008] A combined cable clamp structure for a suspension bridge includes: an upper cable clamp, a lower cable clamp, and cable clamp lugs. The upper and lower cable clamps can be used to clamp the main cable after assembly. Cable clamp lugs are detachably provided on both sides of the upper cable clamp. The bottom of the cable clamp lugs is provided with lifting holes for connecting slings. After the cable clamp lugs are installed, the lifting holes are located below the lower cable clamp.
[0009] Furthermore, the upper half of the cable clamp is provided with a mounting groove for installing the cable clamp ear plate.
[0010] Furthermore, the cable clamp ear plate includes a mounting portion and an extension portion, the width of which matches the mounting groove, and a limiting protrusion is provided at the top.
[0011] Furthermore, the extension is configured as a triangle, and the lifting hole is located at the end of the triangle of the extension.
[0012] Furthermore, the upper half of the cable clamp is provided with blind bolt holes, and the cable clamp ear plate is provided with bolt holes corresponding to the blind bolt holes. The cable clamp ear plate is fixed to the upper half of the cable clamp by bolts.
[0013] Furthermore, the contact surfaces of the upper and lower halves of the cable clamp are designed as a concave-convex connection.
[0014] Furthermore, the upper and lower halves of the cable clamp are provided with corresponding bolt holes and are connected by bolt pairs.
[0015] Furthermore, one of the cable clamps includes at least one lifting hole.
[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0017] Improving the service life of cable clamp bolts and bridge stability: This utility model of a combined cable clamp structure for suspension bridges ingeniously optimizes the transmission path of cable force. The cable force does not act on the cable clamp bolt, but directly on the upper half of the cable clamp. This design allows the bolt to focus solely on providing the clamping force, avoiding the complex stress situation of the bolt simultaneously bearing both cable tension and clamping force. During long-term use, since the bolt is no longer affected by the long-term load of the cable, the possibility of stress relaxation is greatly reduced. Simultaneously, it prevents cable clamp slippage, ensuring a stable force transmission path between the main cable and the cable, thereby guaranteeing the overall stability of the bridge and reducing the risk of safety accidents caused by cable clamp problems.
[0018] Because the upper and lower halves of the cable clamp and the ear plate are detachable, this design has a positive impact on the casting and machining process of the cable clamp. During casting, the upper and lower halves and ear plate can be cast separately. Each component has a relatively simple structure, allowing for smoother flow and filling of the molten metal, significantly reducing the probability of casting defects. This detachable structure also reduces reliance on special molds and processes, decreasing production costs and processing time, which is beneficial for large-scale manufacturing of cable clamps and ensures their quality and supply efficiency.
[0019] Reduced on-site construction difficulty: The structural design of this utility model provides greater convenience during the installation of cable clamps. The cable clamp body, i.e., the upper and lower halves and bolt pairs, can be installed first. The installation of the cable clamp body is relatively simple, as it only involves the connection of the upper and lower halves and the tightening of the bolt pairs. After the cable clamp body is installed and adjusted to the appropriate position, the cable clamp ear plates on both sides are then installed. This step-by-step installation method reduces the difficulty of on-site construction and decreases the complexity and uncertainty of operations during the construction process. Construction personnel can perform installation operations more easily, improving the accuracy and efficiency of installation, shortening the construction cycle, and also reducing safety risks during construction. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the mating structure of the upper half of the cable clamp and the cable clamp ear plate of this utility model;
[0022] Figure 3 This is a schematic diagram of the upper half of the cable clamp of this utility model;
[0023] Figure 4 This is a schematic diagram of the lower half of the cable clamp of this utility model;
[0024] Figure 5 This is a schematic diagram of the structure of the cable clamp ear plate of this utility model;
[0025] Figure 6 This is a schematic diagram of the installation structure in the working state of this utility model.
[0026] Marked in the image:
[0027] 1-Upper half of cable clamp, 2-Lower half of cable clamp, 3-Cable clamp ear plate, 4-Lifting hole, 5-Mounting groove, 6-Mounting part, 7-Extension part, 8-Limiting protrusion, 9-Blind bolt hole. Detailed Implementation
[0028] The present invention will now be described in detail with reference to the accompanying drawings.
[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0030] In this embodiment, as Figure 1 As shown, a combined cable clamp structure for a suspension bridge includes: an upper cable clamp, a lower cable clamp, and cable clamp lugs. The upper and lower cable clamps can be used to clamp the main cable after assembly. Cable clamp lugs are detachably provided on both sides of the upper cable clamp. Lifting holes for connecting slings are provided at the bottom of the cable clamp lugs. After the cable clamp lugs are installed, the lifting holes are located below the lower cable clamp.
[0031] The cable clamp consists of an upper half, a lower half, and cable clamp lugs. The upper and lower halves of the cable clamp can be combined to hold the main cable. The cable clamp lugs are detachably installed on both sides of the upper half of the cable clamp. The bottom of the cable clamp lugs has lifting holes for connecting slings. After installation, the lifting holes are located below the lower half of the cable clamp.
[0032] Implementation process: After the main cable is installed in place, first place the lower half of the cable clamp at the corresponding position below the main cable, then lower the upper half of the cable clamp from above the main cable and align it with the lower half. Next, install the cable clamp lugs at the corresponding positions on both sides of the upper half of the cable clamp.
[0033] Beneficial effects: The detachable structure of the upper half, lower half, and ear plates of the cable clamp reduces casting and machining difficulties, allowing each component to be cast and machined individually, ensuring the quality of the cable clamp. Furthermore, the installation process involves first installing the cable clamp body and then the ear plates, reducing on-site construction difficulties.
[0034] Furthermore, the upper half of the cable clamp is provided with a mounting groove for installing the cable clamp ear plate.
[0035] The protrusions on both sides of the mounting groove are used to limit the cable clamp ear plates.
[0036] Before installing the cable clamp lugs, inspect the mounting slot on the upper part of the cable clamp to ensure it is free of debris and damage. Align the mounting part of the cable clamp lugs with the mounting slot and insert them smoothly.
[0037] The installation slot makes the installation of the cable clamp lugs more precise and convenient, reduces the construction difficulty, and also improves the stability of the connection between the cable clamp lugs and the upper half of the cable clamp, which is beneficial to the transmission of force.
[0038] Furthermore, the cable clamp ear plate includes a mounting portion and an extension portion, the width of which matches the mounting groove, and a limiting protrusion is provided at the top.
[0039] The mounting section is T-shaped, with the lower part matching the width of the mounting groove. After installation, it fits into the mounting groove. The upper limiting protrusion locks the protrusion of the mounting groove and is used to transmit radial force.
[0040] Align the mounting part of the cable clamp ear plate with the mounting groove and insert it. The limiting protrusion will automatically engage with the corresponding limiting groove at the top of the mounting groove, completing the initial positioning.
[0041] The matching design of the mounting part and the mounting groove, as well as the setting of the limiting protrusion, further improves the accuracy and stability of the cable clamp ear plate installation, prevents the cable clamp ear plate from shaking or shifting in the mounting groove, and ensures that the sling force can be accurately transmitted to the upper half of the cable clamp.
[0042] Furthermore, the extension is configured as a triangle, and the lifting hole is located at the end of the triangle of the extension.
[0043] When connecting the slings, pass the connecting end of the sling through the lifting hole at the end of the extension of the sling clamp lug and secure it with the matching connector.
[0044] The triangular extension design increases the structural strength of the cable clamp lugs, allowing the sling force to be distributed more evenly to the upper half of the cable clamp. It also optimizes the force transmission path and improves the stability of the entire cable clamp structure.
[0045] Furthermore, the upper half of the cable clamp is provided with blind bolt holes, and the cable clamp ear plate is provided with bolt holes corresponding to the blind bolt holes. The cable clamp ear plate is fixed to the upper half of the cable clamp by bolts.
[0046] After inserting the mounting slot into the cable clamp ear plate mounting part and initially positioning it, check whether the bolt holes on the cable clamp ear plate are aligned with the bolt blind holes on the upper half of the cable clamp. Use a bolt to pass through the bolt hole and screw it into the bolt blind hole, and tighten it according to the specified torque.
[0047] This connection method ensures a secure connection between the cable clamp lugs and the upper half of the cable clamp, guaranteeing that the sling force acts on the upper half of the cable clamp, while the screw only provides clamping force to the cable clamp. This prevents the screw from loosening and slipping due to the sling force, thus extending the service life of the screw.
[0048] Furthermore, the contact surfaces of the upper and lower halves of the cable clamp are designed as a concave-convex connection.
[0049] When aligning the upper and lower halves of the cable clamp, align the protrusion of the upper half with the concave part of the lower half, and slowly lower the upper half of the cable clamp to complete the alignment.
[0050] The concave-convex connection increases the friction and connection stability between the upper and lower halves of the cable clamp, distributes some of the force on the screw, and allows the screw to focus solely on providing clamping force, thus extending the screw's service life. It also reduces the excessively high requirements for screw strength and lowers the processing difficulty.
[0051] Furthermore, the upper and lower halves of the cable clamp are provided with corresponding bolt holes and are connected by bolt pairs.
[0052] Furthermore, one of the cable clamps includes at least one lifting hole.
[0053] After the upper and lower halves of the cable clamp are initially aligned using the male and female parts, the bolts are passed through the corresponding bolt holes and tightened to the specified torque using a torque wrench.
[0054] The bolted connection ensures that the cable clamp can firmly grip the main cable and provide a stable clamping force. At the same time, it clarifies that the force on the screw is primarily clamping force, avoiding interference from other external forces, extending the screw's service life, and ensuring the stability of the cable clamp.
[0055] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included within the protection scope of the utility model.
Claims
1. A composite cable clamp structure for a suspension bridge, characterized by: include: The cable clamp consists of an upper half, a lower half, and ear plates. The upper and lower halves of the cable clamp, when combined, can be used to grip the main cable. The cable clamp is detachably equipped with ear plates on both sides of the upper half. The bottom of the ear plates is provided with lifting holes for connecting slings. After the ear plates are installed, the lifting holes are located below the lower half of the cable clamp.
2. The combined cable clamp structure for a suspension bridge according to claim 1, characterized in that: The upper half of the cable clamp is provided with a mounting groove for installing the cable clamp ear plate.
3. The composite cable clamp structure of a suspension bridge as recited in claim 2, wherein: The cable clamp ear plate includes a mounting part and an extension part. The width of the mounting part matches the mounting groove, and a limiting protrusion is provided on the top.
4. The composite cable clamp structure of a suspension bridge as defined in claim 3, wherein: The extension is configured as a triangle, and the lifting hole is located at the end of the triangle of the extension.
5. The composite cable clamp structure for a suspension bridge as recited in claim 1, wherein: The upper half of the cable clamp is provided with bolt blind holes, and the cable clamp ear plate is provided with bolt holes corresponding to the bolt blind holes. The cable clamp ear plate is fixed to the upper half of the cable clamp by bolts.
6. The composite cable clamp structure for a suspension bridge as defined in claim 1, wherein: The upper and lower halves of the cable clamp are connected by a concave-convex joint.
7. The composite cable clamp structure of a suspension bridge as defined in claim 1, wherein: The upper and lower halves of the cable clamp are provided with corresponding bolt holes and are connected by bolt pairs.
8. The composite cable clamp structure for a suspension bridge as defined in claim 1, wherein: The cable clamp lug includes at least one lifting hole.