Lead-in cables for railway vehicles

Abstract

This utility model belongs to the field of cable application technology, specifically disclosing a lead cable for railway vehicles, including a middle conductor core, an intermediate rubber insulation layer disposed on the outer layer of the middle conductor core, an intermediate braided shielding layer disposed on the outer layer of the intermediate rubber insulation layer, an outer rubber insulation layer disposed on the outer layer of the intermediate braided shielding layer, a filler layer filling the space between the intermediate braided shielding layer and the outer rubber insulation layer, and an outer rubber sheath layer disposed on the outer layer of the outer rubber insulation layer. The beneficial effects of this lead cable for railway vehicles are: 1. It has good flame retardancy, flexibility, heat resistance, solvent resistance, oil resistance, and low-temperature characteristics, suitable for lead-out connections of motor windings with AC rated voltage of 6000V and below; 2. It has a wide temperature adaptability range, from -20°C to 105°C; 3. It has a tensile strength of 5.72 NMPa and a traction breaking tensile strength of 81.68 N, making it practical and durable.

Description

Technical Field

[0001] This utility model belongs to the field of cable application technology, specifically relating to lead cables for railway vehicles. Background Technology

[0002] Lead cables are suitable for power transmission and signal control in various locomotives, rolling stock, and urban rail transit vehicles. They are key components for connecting motor windings to power sources or control equipment, such as motor lead wires.

[0003] Current motor lead wires, due to changes in the operating environment, no longer possess the original characteristics of high temperature resistance, corrosion resistance, oil resistance, and low temperature resistance, and therefore need to be improved.

[0004] Therefore, based on the above problems, this utility model provides a lead cable for railway vehicles. Utility Model Content

[0005] Purpose of the utility model: The purpose of this utility model is to provide a lead cable for railway vehicles and solve the technical problems existing in the background art.

[0006] Technical solution: The lead cable for railway vehicles provided by this utility model includes an intermediate conductor core, an intermediate rubber insulation layer disposed on the outer layer of the intermediate conductor core, an intermediate braided shielding layer disposed on the outer layer of the intermediate rubber insulation layer, an outer rubber insulation layer disposed on the outer layer of the intermediate braided shielding layer, a filler layer filled between the intermediate braided shielding layer and the outer rubber insulation layer, and an outer rubber sheath layer disposed on the outer layer of the outer rubber insulation layer.

[0007] In this technical solution, the intermediate core conductor consists of one inner tin-plated copper wire and eight outer and inner tin-plated copper wires, with the outer and inner tin-plated copper wires evenly spaced on the outer layer of the inner tin-plated copper wire.

[0008] In this technical solution, the filler layer is polypropylene resin or polyethylene wax.

[0009] The railway vehicle lead cable of this technical solution further includes eight outer core conductors, an outer rubber insulation layer disposed on the outer layer of the outer core conductors, and an outer braided shielding layer disposed on the outer layer of the outer rubber insulation layer.

[0010] In this technical solution, the intermediate braided shielding layer and the outer braided shielding layer are both copper wire braided shielding layers.

[0011] In this technical solution, the intermediate core conductor, the intermediate rubber insulation layer, and the intermediate braided shielding layer form a circular structure, and the outer core conductor, the outer rubber insulation layer, and the outer braided shielding layer also form a circular structure.

[0012] Compared with the prior art, the advantages of the lead cable for railway vehicles of this utility model are as follows: 1. It has good flame retardancy, flexibility, heat resistance, solvent resistance, oil resistance and low temperature characteristics, and is suitable for lead-out connection of motor windings with AC rated voltage of 6000V and below; 2. It has a wide temperature adaptability range, from -20 degrees Celsius to 105 degrees Celsius; 3. It has a tensile strength of 5.72 NMPa and a traction breaking tension of 81.68 N, and is practical and durable. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the main structure of the lead cable for railway vehicles according to this utility model;

[0015] The numbers in the diagram are as follows: 10-Intermediate conductor, 11-Intermediate rubber insulation layer, 12-Intermediate braided shielding layer, 13-Outer rubber insulation layer, 14-Filling layer, 15-Outer conductor, 16-Outer rubber insulation layer, 17-Outer braided shielding layer, 18-Outer rubber sheath layer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "top," "bottom," "one side," "the other side," "front," "back," "middle part," "inner," and "top" are used interchangeably.

[0018] The orientation or positional relationship indicated by terms such as "bottom end" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] Example

[0020] like Figure 1 The railway vehicle lead cable shown includes an intermediate conductor 10, an intermediate rubber insulation layer 11 disposed on the outer layer of the intermediate conductor 10, an intermediate braided shielding layer 12 disposed on the outer layer of the intermediate rubber insulation layer 11, an outer rubber insulation layer 13 disposed on the outer layer of the intermediate braided shielding layer 12, a filler layer 14 filled between the intermediate braided shielding layer 12 and the outer rubber insulation layer 13, and an outer rubber sheath layer 18 disposed on the outer layer of the outer rubber insulation layer 13.

[0021] The above-described lead cable is suitable for connecting the windings of motors with an AC rated voltage of 6000V and below; it has a wide temperature range of -20°C to 105°C; tensile strength of 5.72 NMPa and traction breaking tension of 81.68 N; it is practical and durable.

[0022] In addition, the intermediate core conductor 10 is preferably composed of one inner tin-plated copper wire and eight outer and inner tin-plated copper wires. The outer and inner tin-plated copper wires are evenly spaced on the outer layer of the inner tin-plated copper wire, which has good conductivity, physical and mechanical properties and corrosion resistance. It also has the characteristics of high conductivity, good processing performance and welding performance.

[0023] In addition, the filler layer 14 is preferably polypropylene resin or polyethylene wax. Polypropylene resin has good flexibility and plasticity, which can fill the gaps inside the cable and fix the internal structure of the cable. Polyethylene wax is a stable filler material with excellent hydrolysis resistance and insulation properties.

[0024] In addition, the preferred lead cable for railway vehicles also includes eight outer conductor cores 15, an outer rubber insulation layer 16 disposed on the outer layer of the outer conductor cores 15, and an outer braided shielding layer 17 disposed on the outer layer of the outer rubber insulation layer 16.

[0025] Among them, eight outer conductor cores 15 are located inside the filler layer 14 and are evenly spaced on the outer layer of the middle conductor core 10. The above design enhances the overall strength of the lead cable (tensile strength, traction breakage tension) while also achieving stable conductivity performance.

[0026] In addition, preferably the middle braided shielding layer 12 and the outer braided shielding layer 17 are copper wire braided shielding layers. The higher the braiding coverage (coverage is 65%, 85%, 90%, etc.), the better the shielding effect is usually. It has good flexibility and can adapt to the bending and movement of the cable, and will not break easily.

[0027] In addition, preferably, the middle conductor 10, the middle rubber insulation layer 11 and the middle braided shielding layer 12 form a circular structure, and the outer conductor 15, the outer rubber insulation layer 16 and the outer braided shielding layer 17 form a circular structure.

[0028] The diameter of the circular structure formed by the middle conductor 10, the middle rubber insulation layer 11, and the middle braided shielding layer 12 is larger than the diameter of the circular structure formed by the outer conductor 15, the outer rubber insulation layer 16, and the outer braided shielding layer 17, ensuring the mechanical properties of the overall lead cable, including drag resistance and tensile strength.

[0029] The lead cable of this structure is particularly suitable for wiring electrical equipment inside locomotives and rolling stock. Its flexible structure allows it to be used in environments contaminated with mineral oil and fuel oil.

[0030] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lead cable for a railway vehicle, characterized by: It includes an intermediate conductor (10), an intermediate rubber insulation layer (11) disposed on the outer layer of the intermediate conductor (10), an intermediate braided shielding layer (12) disposed on the outer layer of the intermediate rubber insulation layer (11), an outer rubber insulation layer (13) disposed on the outer layer of the intermediate braided shielding layer (12), a filler layer (14) filled between the intermediate braided shielding layer (12) and the outer rubber insulation layer (13), and an outer rubber sheath layer (18) disposed on the outer layer of the outer rubber insulation layer (13).

2. The lead cable for rolling stock according to claim 1, characterized in that: The intermediate conductor (10) consists of one inner tin-plated copper wire and eight outer and inner tin-plated copper wires, with the outer and inner tin-plated copper wires evenly spaced on the outer layer of the inner tin-plated copper wire.

3. The lead cable for rolling stock according to claim 1 or 2, characterized in that: The filler layer (14) is polypropylene resin or polyethylene wax.

4. The lead cable for rolling stock according to claim 3, characterized in that: The lead cable for railway vehicles also includes eight outer conductor cores (15), an outer rubber insulation layer (16) disposed on the outer layer of the outer conductor cores (15), and an outer braided shielding layer (17) disposed on the outer layer of the outer rubber insulation layer (16).

5. The lead cable for rolling stock according to claim 4, characterized in that: The intermediate braided shielding layer (12) and the outer braided shielding layer (17) are copper wire braided shielding layers.

6. The lead cable for rolling stock according to claim 4, characterized in that: The intermediate core conductor (10), intermediate rubber insulation layer (11) and intermediate braided shielding layer (12) form a circular structure, and the outer core conductor (15), outer rubber insulation layer (16) and outer braided shielding layer (17) form a circular structure.

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