A cable clamping device based on tapered sleeve self-locking

Abstract

This invention relates to the field of catenary clamping technology and discloses a catenary clamping device based on a self-locking conical sleeve. It aims to solve the technical problems of existing catenary clamping devices, such as cumbersome operation, long processing time, poor connection reliability, and reliance on operator skills. The invention includes a drive module and a clamp module that are detachably installed via a connecting structure. The drive module includes a cylindrical shell with a power mechanism inside. The power mechanism is connected to a conical tube, the inner side of which is stepped to accommodate the catenary and an elastic conical sleeve. The clamp module has a channel for accommodating the catenary and an elastic conical sleeve disposed within the channel. Under the drive of the power mechanism, the conical tube compresses the elastic conical sleeve, causing radial deformation to grip the catenary. This invention enables rapid assembly and disassembly of the drive module and clamp module, with one-button hydraulic pressing, greatly shortening repair time. The connection point has high mechanical strength and good vibration resistance, preventing loosening or damage to the catenary.

Description

Technical Field

[0001] This invention relates to the field of catenary technology, and in particular to a catenary clamping device based on a tapered sleeve self-locking mechanism. Background Technology

[0002] The catenary cable is a key component of the electrified railway catenary system. Its main function is to conduct current by suspending the contact wire and to bear mechanical and electrical loads. Due to long-term exposure to the complex atmospheric environment and continuous exposure to mechanical vibration, electrical arcs, corrosion, and unexpected external impacts, the catenary cable may experience fatigue breakage or even fracture. Once a line break occurs, it will paralyze the entire anchor section of the catenary, interrupt railway transportation, and cause huge economic losses and safety hazards. Currently, for on-site repair of broken catenary cables, traditional methods mainly rely on manual splicing using tools such as tensioners, wedge clamps, and hydraulic pliers. These methods generally have the following significant drawbacks: Cumbersome operation and excessive time consumption: The repair process requires multiple people to cooperate, and the steps are complex, including tensioning, alignment, fixing, and crimping. In the time-sensitive repair window, the lengthy operation time will greatly extend the line interruption period. Inconsistent connection reliability: Traditional mechanical crimping or wedge fixing methods are difficult to guarantee the uniformity and stability of clamping force. There is a risk of loosening due to insufficient clamping, or localized damage to the catenary cable due to overpressure (such as broken strands or cracked fittings), creating potential secondary malfunctions for subsequent operation. The tools are bulky and have poor adaptability: on-site repair tools are often quite heavy, and different molds or clamps are required for catenary cables of different diameters, resulting in poor versatility and increasing the labor intensity and tool management costs for repair personnel. The connection accuracy is difficult to control: in tense and harsh on-site environments, it is difficult to accurately ensure the alignment of the axes of the two broken cables manually, leading to misalignment and affecting the mechanical strength and electrical conductivity of the splice point.

[0003] Chinese patent document in the prior art, application number 201210107616.X, discloses a pre-twisted armored splice clamp for force cables. The pre-twisted armored splice clamp includes two spiral pre-twisted wires, which are wound together at the center to form a closed circular tube.

[0004] However, the above-mentioned solutions have at least the following technical problems during implementation: clamping the catenary with wire clamps is cumbersome, time-consuming, has poor connection reliability, and relies on operators. Therefore, there is an urgent need to propose a catenary clamping device based on a tapered sleeve self-locking mechanism. Summary of the Invention

[0005] In view of the above technical problems, this disclosure provides a catenary clamping device based on a tapered sleeve self-locking, which solves the technical problems of cumbersome operation, long time consumption, poor connection reliability and dependence on operators in the prior art when clamping catenary cables with line clamps.

[0006] According to one aspect of this disclosure, a catenary clamping device based on a tapered sleeve self-locking is provided, comprising a drive module and a clamp module detachably installed via a connecting structure. The drive module includes a cylindrical housing, a power mechanism disposed within the cylindrical housing, and the power mechanism is connected to a tapered tube. The inner side of the tapered tube is stepped and is used to accommodate the catenary and the elastic tapered sleeve.

[0007] In some embodiments of this disclosure, the clamp module has a channel for receiving the load-bearing cable and an elastic cone sleeve disposed within the channel;

[0008] In some embodiments of this disclosure, the tapered tube is driven by a power mechanism to compress the elastic tapered sleeve, causing the elastic tapered sleeve to undergo radial deformation to hold the load-bearing cable.

[0009] In some embodiments of this disclosure, the power mechanism includes a telescopic hydraulic cylinder that extends out of a cylindrical housing, the piston end of the telescopic hydraulic cylinder being fitted with a tapered tube.

[0010] In some embodiments of this disclosure, the drive module further includes a handle for mounting a push-button switch, the handle being mounted on a cylindrical housing.

[0011] In some embodiments of this disclosure, the connection structure includes a U-shaped frame fixed above the cylindrical outer shell for detachable installation of the wire clamp module. The U-shaped frame has a slot for mounting a pin to fix the wire clamp module. The wire clamp module has a U-shaped structure above it for accommodating a tapered tube, and the sidewall of the U-shaped structure has a mounting hole that mates with the pin.

[0012] In some embodiments of this disclosure, the lower part of the clamp module is provided with a hollow cylindrical channel for installing an elastic cone sleeve, and a load-bearing cable is threaded through the elastic cone sleeve.

[0013] In some embodiments of this disclosure, the tapered tube is detachable, and an auxiliary block is fitted on the outside of the tapered tube to fill the gap between the tapered tube and the wire clamp module.

[0014] In some embodiments of this disclosure, the wall of the elastic tapered sleeve has multiple axial cuts.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention enables rapid and efficient on-site repairs. Through modular design, the drive module and clamp module can be quickly disassembled, and a highly efficient hydraulic drive mechanism simplifies the operation process. Repair personnel only need to quickly connect the pre-installed cable clamp module to the U-shaped frame via a pin to activate the hydraulic drive and complete the connection, greatly shortening repair time and rapidly restoring line access.

[0017] This ensures the mechanical reliability and safety of the connection point. The tapered tube and elastic tapered sleeve structure, under the powerful thrust of the hydraulic cylinder, generates a large and uniform radial clamping force, allowing the elastic tapered sleeve to firmly hold the catenary. This connection method provides stable clamping force, avoiding the risk of loosening due to vibration associated with traditional methods, and ensuring that the connection point has mechanical strength close to that of the original catenary.

[0018] The operation is simple, reducing the labor intensity and skill requirements of personnel. The entire connection process can be controlled by pressing the switch on the handle, simplifying the complex tightening, alignment, and crimping operations into a "one-button" action. This reduces the dependence on the number and proficiency of emergency repair personnel, and lowers the difficulty of operation and the risk of human error.

[0019] It possesses excellent adaptability and versatility. First, the elastic tapered sleeve with multiple axial slits ensures sufficient and uniform radial deformation under compression, accommodating the minute tolerances of the catenary. Second, the detachable tapered tube and its external auxiliary block design allow for adaptation to catenary cables of different diameters by replacing only a few parts, improving the device's versatility and reducing the types of tools required.

[0020] The compact and rational structural design enhances operational convenience. The tapered tubes of the clamp module and drive module precisely match, ensuring good guidance. The overall structural layout is reasonable, and the relatively small size makes it easy to carry and operate in the space-constrained field of the overhead contact line. Attached Figure Description

[0021] Figure 1 A schematic diagram of a cable clamping device based on a tapered sleeve self-locking mechanism;

[0022] Figure 2 A top view of a cable clamping device based on a tapered sleeve self-locking mechanism;

[0023] Figure 3 for Figure 2 Sectional view of plane AA;

[0024] The components in the diagram are named as follows: 1. Cylindrical outer shell; 2. Tapered tube; 3. Support cable; 4. Elastic tapered sleeve; 5. Telescopic hydraulic cylinder; 6. Handle; 7. U-shaped frame; 8. Pin; 9. U-shaped structure; 10. Channel; 11. Auxiliary block; 12. Press switch; 13. Axial cut. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Example 1

[0026] This example discloses a load-bearing cable clamping device based on a tapered sleeve self-locking mechanism. See [link to relevant documentation]. Figures 1 to 3 ;

[0027] It includes a drive module and a clamp module that are detachably installed via a connecting structure. The drive module includes a cylindrical housing 1, a power mechanism is installed inside the cylindrical housing 1, and the power mechanism is connected to a tapered tube 2. The inner side of the tapered tube 2 is stepped and is used to accommodate the load-bearing cable 3 and the elastic cone sleeve 4.

[0028] The clamp module has a channel 10 for accommodating the catenary cable 3, and an elastic cone sleeve 4 disposed within the channel;

[0029] Driven by the power mechanism, the tapered tube 2 squeezes the elastic tapered sleeve 4, causing the elastic tapered sleeve 4 to undergo radial deformation to hold the load-bearing cable tightly.

[0030] The power mechanism includes a telescopic hydraulic cylinder 5 that extends out of the cylindrical housing, and a tapered tube 2 is mounted on the piston end of the telescopic hydraulic cylinder 5.

[0031] The drive module also includes a handle 6 on which a push switch 12 is mounted, and the handle 6 is mounted on a cylindrical housing 1.

[0032] The connecting structure includes a U-shaped frame 7 fixed above the cylindrical housing 1 for detachable installation of the wire clamp module. A slot is provided on the top of the U-shaped frame 7 for mounting a pin 8 to fix the wire clamp module. Above the wire clamp module is a U-shaped structure 9 for accommodating the tapered tube 2. The side wall of the U-shaped structure 9 has mounting holes that mate with the pin.

[0033] The lower part of the clamp module is provided with a hollow cylindrical channel 10 for installing an elastic cone sleeve 4, and a load-bearing cable 3 is inserted inside the elastic cone sleeve 4.

[0034] The tapered tube 2 is detachable, and an auxiliary block 11 is fitted on the outside of the tapered tube to fill the gap between the tapered tube 2 and the wire clamp module.

[0035] Multiple axial cuts 13 are made in the pipe wall of the elastic tapered sleeve 4.

[0036] During operation, the catenary cable 3 is inserted into the elastic conical sleeve 4 and then into the channel 10 of the clamp module. The U-shaped structure 9 of the clamp module with the catenary cable 3 installed is aligned with the U-shaped frame 7 of the drive module, and the pin 8 is inserted to complete the quick connection and fixation of the two modules. The operator holds the handle 6 and presses the push switch to start the telescopic hydraulic cylinder 5. The piston rod of the hydraulic cylinder pushes the conical tube 2 forward, allowing it to smoothly enter the U-shaped structure 9 of the clamp module. As the conical tube 2 moves forward, its inner stepped surface squeezes the elastic conical sleeve 4. Under the strong hydraulic thrust, the elastic conical sleeve 4 is axially compressed and forced to undergo radial deformation due to the axial cut 13 on its tube wall, thus tightly locking the catenary cable 3 inside. The auxiliary block 11 ensures the stability of pressure transmission during this process. After the connection is completed, the hydraulic cylinder is operated to retract the conical tube 2, the pin 8 is removed, and the drive module is separated from the clamp module with the catenary cable locked.

[0037] Although some preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0038] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A load-bearing cable clamping device based on a tapered sleeve self-locking mechanism, characterized in that: It includes a drive module and a clamp module that are detachably installed via a connecting structure. The drive module includes a cylindrical housing, a power mechanism is installed inside the cylindrical housing, and the power mechanism is connected to a tapered tube. The inner side of the tapered tube is stepped and is used to accommodate the load-bearing cable and the elastic cone sleeve. The clamp module has a channel for accommodating the load-bearing cable and an elastic cone sleeve disposed within the channel; Driven by a power mechanism, the tapered tube compresses the elastic tapered sleeve, causing the elastic tapered sleeve to deform radially and grip the load-bearing cable.

2. The cable clamping device based on tapered sleeve self-locking as described in claim 1, characterized in that: The power mechanism includes a telescopic hydraulic cylinder that extends out of a cylindrical housing, with a tapered tube mounted on the piston end of the telescopic hydraulic cylinder.

3. The cable clamping device based on tapered sleeve self-locking as described in claim 1, characterized in that: The drive module also includes a handle for mounting a push-button switch, the handle being mounted on a cylindrical housing.

4. The cable clamping device based on tapered sleeve self-locking as described in claim 1, characterized in that: The connection structure includes a U-shaped frame fixed to the top of the cylindrical shell for detachable installation of the wire clamp module. The U-shaped frame has a slot for installing a pin to fix the wire clamp module. The top of the wire clamp module is a U-shaped structure for accommodating a tapered tube. The side wall of the U-shaped structure has a mounting hole for cooperating with the pin.

5. The cable clamping device based on tapered sleeve self-locking as described in claim 1, characterized in that: The lower part of the clamp module is provided with a hollow cylindrical channel for installing an elastic cone sleeve, and a load-bearing cable is inserted inside the elastic cone sleeve.

6. The cable clamping device based on tapered sleeve self-locking as described in claim 1, characterized in that: The tapered tube is detachable, and an auxiliary block is fitted on the outside of the tapered tube to fill the gap between the tapered tube and the wire clamp module.

7. The cable clamping device based on tapered sleeve self-locking as described in claim 1, characterized in that: The elastic tapered sleeve has multiple axial cuts in its tube wall.

Images