A stay cable center anchor wire clamp that is easy to install

Abstract

This utility model discloses an easy-to-install center anchor clamp for catenary cables, specifically relating to the field of railway electrical equipment technology. It includes a support frame with N-shaped grooves at both ends. Two arc-shaped blocks are rotatably mounted on the inner surface of the support frame, and a pressing bolt for pressing the arc-shaped blocks is threaded onto the outer surface of the support frame. This easy-to-install center anchor clamp for catenary cables employs a return spring design. In its natural state, the return spring keeps the arc-shaped blocks open, allowing for quick insertion of the catenary cable without additional tools, simplifying the installation process. During disassembly, simply loosening the pressing bolts causes the return spring to automatically release the arc-shaped blocks, facilitating inspection or repositioning of the catenary cable and significantly improving maintenance efficiency. The spacing of the mounting bracket can be adjusted using screws to adapt to different specifications of catenary cables and installation scenarios. The support frame and all components are made of weather-resistant materials, extending their service life.

Description

Technical Field

[0001] This utility model relates to the field of railway electrical equipment technology, and in particular to a center anchor clamp for load-bearing cables that is easy to install. Background Technology

[0002] In electrified rail transit systems, the catenary, as a crucial component of the overhead contact system, plays a vital role in suspending the contact wire and transmitting tension. The central anchor is the core fixing point of the catenary, its function being to evenly distribute the tension of the catenary and prevent it from shifting, loosening, or becoming overstretched due to factors such as temperature changes and train vibrations, thereby avoiding safety accidents such as contact wire deformation and breakage.

[0003] Traditional catenary center anchor clamps have the following problems in use:

[0004] Insufficient clamping stability: Some clamps use a simple bolt compression structure, which is prone to loosening under the vibration generated by high-speed train operation or strong winds, causing relative slippage between the catenary and the clamp, affecting the tension balance of the contact network.

[0005] Installation and maintenance are inconvenient: Traditional wire clamps have mostly fixed clamping components, requiring precise alignment with the catenary cable position during installation, which is cumbersome; and disassembly requires completely loosening all fasteners, which is time-consuming and laborious, and not conducive to later maintenance and adjustment.

[0006] Poor adaptability: Different specifications of catenary cables require matching clamps of different sizes, resulting in low versatility and increased management costs for spare parts; at the same time, the friction parts of some clamps are prone to wear, and the clamping force decreases significantly in severe weather (such as rain, snow, and sandstorms), posing a safety hazard. Utility Model Content

[0007] The main purpose of this utility model is to provide a center anchor clamp for load-bearing cables that is easy to install, aiming to improve clamping stability, simplify installation and maintenance procedures, and enhance adaptability to different working conditions.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A center anchor clamp for easy installation of a load-bearing cable includes a support frame. The support frame has N-shaped grooves at both ends. Two arc-shaped blocks are rotatably mounted on the inner surface of the support frame. A compression bolt for compressing the arc-shaped blocks is also threaded onto the outer surface of the support frame.

[0010] Preferably, the inner surface of the arc-shaped block is fixed with a plurality of friction strips along the linear direction, and the outer surface of the friction strips is also fixed with a reset spring that is fixedly connected to the side wall of the support frame.

[0011] Preferably, when the return spring is in its natural state, the two friction strips are in the open state.

[0012] Preferably, the friction strip is made of highly elastic rubber and has anti-slip texture on its surface.

[0013] Preferably, two mounting brackets are symmetrically fixed to the outer surface of the support frame, and a screw is provided between the two mounting brackets. The screw is equipped with a lock nut.

[0014] Preferably, the width of the N-shaped groove is slightly larger than the diameter of the load-bearing cable, and the edges of the groove are rounded.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This utility model adopts a return spring design. In its natural state, the return spring keeps the arc-shaped block open, allowing the load-bearing cable to be quickly inserted without additional tools, simplifying the installation process. During disassembly, simply loosen the clamping bolt, and the return spring will automatically spring open the arc-shaped block, facilitating the inspection or repositioning of the load-bearing cable and greatly improving maintenance efficiency.

[0017] This utility model allows the spacing of the mounting frame to be changed by screws, adapting to different specifications of load-bearing cables and installation scenarios; the support frame and various components are made of weather-resistant materials, which can adapt to various environments such as high and low temperatures, humidity, and sand and dust, thus extending the service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the support frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the bottom structure of this utility model.

[0021] In the diagram: 1. Support frame; 2. N-shaped groove; 3. Arc-shaped block; 31. Friction strip; 32. Return spring; 4. Extrusion bolt; 51. Mounting bracket; 52. Screw. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figure 1 - Figure 3As shown, an easy-to-install catenary center anchor clamp includes a support frame 1. The support frame 1 is made of high-strength alloy steel, which has anti-corrosion and wear-resistant properties and can adapt to complex outdoor environments. N-shaped grooves 2 are opened at both the front and rear ends of the support frame 1. The groove width of the N-shaped groove 2 is slightly larger than the diameter of the catenary. The edges of the grooves are rounded to avoid scratching the outer insulation layer or metal structure of the catenary during installation. Two arc-shaped blocks 3 are rotatably installed on the inner surface of the support frame 1. The outer surface of the support frame 1 is also threaded with compression bolts 4 for pressing the arc-shaped blocks 3. When the compression bolts 4 are tightened, they can press the arc-shaped blocks 3 so that the two arc-shaped blocks 3 clamp the center anchor wire, preventing the clamp from falling off in bad weather and causing a safety accident.

[0024] like Figure 3 As shown, multiple friction strips 31 along the direction of the cable are fixed on the inner surface of the arc-shaped block 3. The friction strips 31 are made of high-elasticity rubber and have anti-slip textures on the surface, which can increase the friction with the load-bearing cable and avoid damage to the load-bearing cable from hard contact. Furthermore, in order to facilitate the quick insertion of the load-bearing cable during use, a return spring 32 fixedly connected to the side wall of the support frame 1 is also fixed on the outer surface of the friction strips 31. The return spring 32 is existing technology. When the return spring 32 is in the natural state, the two friction strips 31 are in the open state, which can facilitate the operator to quickly insert the load-bearing cable.

[0025] Two mounting brackets 51 are symmetrically fixed on the outer surface of the support frame 1. A screw 52 for installing slings is provided between the two mounting brackets 51. The nuts matched with the screw 52 are anti-loosening nuts, which can effectively prevent loosening caused by vibration.

[0026] The specific implementation method of this embodiment is as follows:

[0027] 1. Arc-shaped block 3 opens for positioning

[0028] Since the reset spring 32 is in its natural state, the two arc blocks 3 are in an open state (the distance between them is slightly larger than the cable diameter), the center anchor wire can be directly inserted between the two arc blocks 3 from the N-shaped groove 2 along the axial direction of the support frame 1. The N-shaped groove 2 can help limit the position of the cable and prevent it from shifting when inserted.

[0029] II. Initial Clamping Adjustment

[0030] Hold the compression bolt 4 and slowly screw it into the threaded hole on the outer surface of the support frame 1. At this time, the end of the bolt gradually presses against the outer side of the arc block 3. As the bolt is tightened, the arc block 3 retracts inward around the rotation axis, and the reset spring 32 is compressed and generates a reverse elastic force (to assist in opening during subsequent disassembly).

[0031] III. Fastening and Clamping

[0032] Continue to tighten the clamping bolt 4 until the friction strip 31 on the inner surface of the arc block 3 is in close contact with the cable surface. The friction strip 31 is set along the direction of the cable to increase the friction with the cable when clamping, while avoiding lateral slippage. At this time, attention should be paid to the moderate force, so that the cable does not shake and there is no obvious deformation (excessive squeezing may damage the outer layer of the cable).

[0033] It should be noted that the specific installation methods of the friction strip 31 and the return spring 32 in this utility model are all conventional designs, and will not be described in detail in this utility model.

Claims

1. A center anchor clamp for easy installation of a load-bearing cable, comprising a support frame (1), characterized in that: The support frame (1) has N-shaped grooves (2) at both the front and rear ends. Two arc-shaped blocks (3) are rotatably installed on the inner surface of the support frame (1). The outer surface of the support frame (1) is also threaded with extrusion bolts (4) for extruding the arc-shaped blocks (3).

2. The easily installable center anchor clamp for load-bearing cables according to claim 1, characterized in that: The inner surface of the arc-shaped block (3) is fixed with a plurality of friction strips (31) along the direction of the thread, and the outer surface of the friction strips (31) is also fixed with a reset spring (32) that is fixedly connected to the side wall of the support frame (1).

3. A center anchor clamp for easy installation of a load-bearing cable according to claim 2, characterized in that: When the reset spring (32) is in its natural state, the two friction strips (31) are in the open state.

4. A center anchor clamp for easy installation of a load-bearing cable according to claim 2, characterized in that: The friction strip (31) is made of high-elasticity rubber and has anti-slip texture on its surface.

5. A center anchor clamp for easy installation of a load-bearing cable according to claim 2, characterized in that: The outer surface of the support frame (1) is symmetrically fixed with two mounting brackets (51), and a screw (52) is provided between the two mounting brackets (51). The screw (52) is equipped with a lock nut.

6. A center anchor clamp for easy installation of a load-bearing cable according to claim 1, characterized in that: The width of the N-shaped groove (2) is slightly larger than the diameter of the load-bearing cable, and the edge of the groove is rounded.

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