Composite bridging flexible cable for motor train unit

Abstract

The utility model provides a composite bridging flexible cable for a motor train unit, which belongs to the technical field of high-voltage cables and comprises a cable body, the cable body comprises a wire core structure, the wire core structure is provided with a compression-resistant composite layer, and the compression-resistant composite layer comprises a first elastic layer and a second elastic layer. A corrugated elastic structure layer is arranged between the first elastic layer and the second elastic layer, the corrugated elastic structure layer comprises a first contact part, a second contact part, a connecting part and edge sealing parts, the edge sealing parts are located at the two ends of the corrugated elastic structure layer, and the connecting part is located between the first contact part and the second contact part. On the premise of improving the overall compression resistance of the cable, weakening of the overall flexibility of the cable is avoided to a great extent, the toughness and bending performance of the cable are ensured, wiring and winding in a bridging area of the motor train unit are facilitated, the working difficulty is greatly reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of high-voltage cables, in particular to a composite jumper soft cable for a motor vehicle group. Background Art

[0002] Cables are generally composed of three parts: conductor, insulation layer and protective layer. They are laid underground, in the air, etc. There are usually two types of cables: power cables and control cables. Power cables are mainly used for the transmission and distribution of electric energy, while control cables are mainly used for measurement, protection, control and other lines. Cables have the characteristics of internal power supply and external insulation.

[0003] Among them, the cables used in EMUs are generally high-voltage cables. High-voltage cables are a type of power cables, which refer to power cables used to transmit power between 1kv-1000kv and are mostly used in power transmission and distribution. The components of high-voltage cables from the inside to the outside include: conductor, insulation, inner sheath, filler (armor) and outer insulation. Due to the particularity of the working environment, the compressive protection structure layer of the cables used in EMUs is generally thickened. However, although the overly thick structure layer protects the internal conductor, it also reduces the bending degree of the cable. Because in the area where the EMU is bridged, the high-voltage cable needs to pass through the clamps and brackets on the thin plate and be wrapped around the bracket to form a double helix winding. The wiring is difficult and the cable is bent to a large extent, which greatly increases the difficulty of assembly, is inconvenient to install, and reduces work efficiency. Utility Model Content

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. Specifically, the present invention mainly provides a composite jumper soft cable for EMUs, which is used to solve the technical problem proposed in the above background technology that in order to meet the pressure resistance requirements of EMUs, the main method of thickening the pressure-resistant protection structure layer is adopted, which greatly reduces the bending degree of the cable and increases the difficulty of wiring.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A composite jumper soft cable for EMUs comprises a cable body, wherein the cable body comprises a wire core structure, a compression-resistant composite layer is arranged on the wire core structure, the compression-resistant composite layer comprises a first elastic layer and a second elastic layer, a corrugated elastic structure layer is arranged between the first elastic layer and the second elastic layer, the corrugated elastic structure layer comprises a first contact portion, a second contact portion, a connecting portion and an edge sealing portion, the edge sealing portions are located at both ends of the corrugated elastic structure layer, and the connecting portion is located between the first contact portion and the second contact portion.

[0007] Furthermore, a shielding layer formed by braiding metal wires is arranged on the compression-resistant composite layer, and a PE outer sheath is arranged on the shielding layer.

[0008] Furthermore, the thickness of the first elastic layer and the second elastic layer are the same, and the thickness of the first elastic layer and the second elastic layer are both smaller than the thickness of the PE outer sheath.

[0009] Furthermore, the wire core structure includes a cross-linked polyethylene insulation layer and an intermediate skeleton, and the cross-linked polyethylene insulation layer and the intermediate skeleton form four placement cavities, and a plurality of conductors are arranged in each of the placement cavities.

[0010] Furthermore, each of the conductors comprises an insulating sleeve and copper wires twisted together in the insulating sleeve.

[0011] Furthermore, reinforcing ribs are provided at the through-hole positions of the intermediate frame.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model realizes that the weakening of the overall softness of the cable is avoided to a great extent under the premise of improving the overall compressive resistance of the cable through the arrangement of the wire core structure, the first elastic layer, the second elastic layer, the corrugated elastic structure layer, the shielding layer and the PE outer sheath, and the gaps produced by the corrugated elastic structure layer are used to increase the bending space to ensure the toughness and bending performance of the cable, which is conducive to wiring and winding in the cross-connection area of ​​the EMU, greatly reducing the difficulty of work and improving the efficiency of work, and the two contact parts are tightly fitted with the elastic layer to ensure the overall stability and durability of the composite layer, and the structure is simple, easy to process, and has certain practical value.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure decomposition of the utility model;

[0017] Figure 3 It is a schematic diagram of a partial cross-section of the cable of the present utility model.

[0018] In the figure: 1. cable body; 2. core structure; 21. cross-linked polyethylene insulation layer; 22. intermediate skeleton; 23. placement cavity; 24. conductor; 241. insulation sleeve; 242. copper wire; 25. reinforcing ribs; 3. compression-resistant composite layer; 31. first elastic layer; 32. second elastic layer; 33. corrugated elastic structure layer; 331. first contact part; 332. second contact part; 333. connecting part; 334. edge sealing part; 4. shielding layer; 5. PE outer sheath. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0020] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field of the present invention. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] Please refer to the attached Figure 1-3 A composite jumper soft cable for EMUs comprises a cable body 1, wherein the cable body 1 comprises a wire core structure 2, a compression-resistant composite layer 3 is arranged on the wire core structure 2, the compression-resistant composite layer 3 comprises a first elastic layer 31 and a second elastic layer 32, a corrugated elastic structure layer 33 is arranged between the first elastic layer 31 and the second elastic layer 32, the corrugated elastic structure layer 33 is extruded by a variable-caliber extrusion device, the corrugated elastic structure layer 33 comprises a first contact portion 331, a second contact portion 332, a connecting portion 333 and an edge sealing portion 334, the edge sealing portion 334 is located at both ends of the corrugated elastic structure layer 33, the connecting portion 333 is located between the first contact portion 331 and the second contact portion 332, and the two ends of the compression-resistant composite layer 3 are sealed by the edge sealing portion 334, so as to achieve a waterproof and anti-fouling effect.

[0023] Through the above structure, it is achieved that the weakening of the overall softness of the cable is avoided to a great extent while improving the overall compressive resistance of the cable, thereby ensuring the toughness and bending performance of the cable, facilitating wiring and winding in the jumper area of ​​the EMU, greatly reducing the difficulty of work, improving work efficiency, and having a simple structure, easy processing, and having certain practical value.

[0024] Please refer to the attached Figure 2 and attached Figure 3The compression-resistant composite layer 3 is provided with a shielding layer 4 formed by braiding metal wires. The shielding layer 4 improves the overall anti-interference effect of the cable. The shielding layer 4 is provided with a PE outer sheath 5. The PE outer sheath 5 protects the entire cable and improves the waterproof and insulation performance. The thickness of the first elastic layer 31 and the second elastic layer 32 are the same, and the thickness of the first elastic layer 31 and the second elastic layer 32 are both less than the thickness of the PE outer sheath 5. The first elastic layer 31 and the second elastic layer 32 cooperate with each other to improve the overall compression resistance of the cable. At the same time, when the cable is bent, the deformation degree of the corrugated elastic structure layer 33 is constrained. The wire core structure 2 includes a cross-linked polyethylene insulation layer 21 and an intermediate skeleton 22, and the cross-linked polyethylene insulation layer 21 and the intermediate skeleton 22 constitute four placement cavities 23, and a plurality of conductors 24 are arranged in each of the placement cavities 23, and each of the conductors 24 includes an insulating sleeve 241 and copper wires 242 twisted together in the insulating sleeve 241. The transmission of electric energy is realized through the conductor 24, and the intermediate skeleton 22 improves the overall stability of the cable and reduces the mutual squeezing force between the conductors 24. The through-hole position of the intermediate skeleton 22 is provided with reinforcing ribs 25, and the overall toughness of the cable is improved through the mutual cooperation between the reinforcing ribs 25 and the intermediate skeleton 22.

[0025] The above description of the utility model in combination with the accompanying drawings is an exemplary description. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as the non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A composite jumper flexible cable for a train set, comprising a cable body (1), wherein the cable body (1) comprises a wire core structure (2), and a compression-resistant composite layer (3) is provided on the wire core structure (2), characterized in that: The compression-resistant composite layer (3) comprises a first elastic layer (31) and a second elastic layer (32); a corrugated elastic structure layer (33) is arranged between the first elastic layer (31) and the second elastic layer (32); the corrugated elastic structure layer (33) comprises a first contact portion (331), a second contact portion (332), a connecting portion (333) and an edge sealing portion (334); the edge sealing portion (334) is located at both ends of the corrugated elastic structure layer (33); and the connecting portion (333) is located between the first contact portion (331) and the second contact portion (332).

2. A composite jumper flexible cable for EMU according to claim 1, characterized in that: A shielding layer (4) formed by braiding metal wires is arranged on the compression-resistant composite layer (3), and a PE outer sheath (5) is arranged on the shielding layer (4).

3. A composite jumper flexible cable for EMU according to claim 1, characterized in that: The first elastic layer (31) and the second elastic layer (32) have the same thickness, and the thickness of the first elastic layer (31) and the second elastic layer (32) are both smaller than the thickness of the PE outer sheath (5).

4. A composite jumper flexible cable for EMU according to claim 1, characterized in that: The wire core structure (2) comprises a cross-linked polyethylene insulation layer (21) and an intermediate skeleton (22), and the cross-linked polyethylene insulation layer (21) and the intermediate skeleton (22) form four placement cavities (23), and each placement cavity (23) is provided with a plurality of conductors (24).

5. A composite jumper flexible cable for EMU according to claim 4, characterized in that: Each of the conductors (24) comprises an insulating sleeve (241) and copper wires (242) twisted together in the insulating sleeve (241).

6. A composite jumper flexible cable for EMU according to claim 4, characterized in that: A reinforcing rib (25) is provided at the through hole position of the intermediate frame (22).

Images