Direct-current traction combination cable for rail transit system

Abstract

The utility model relates to a direct-current traction combination cable for a rail transit system, which comprises two pairs of power supply wire cores, two pairs of signal wire cores, a grounding wire core and a cross-shaped rubber partition plate, the two pairs of power supply wire cores and the two pairs of signal wire cores are respectively arranged in four clamping grooves of the rubber partition plate, and the grounding wire core is arranged in the center of the rubber partition plate. The outer sides of the pair of power line cores and the pair of signal line cores are all coated with first inner shielding layers, gaps among the first inner shielding layers, the power line cores and the signal line cores are filled with first filler, the edge of the rubber partition plate is coated with a waterproof layer, and gaps between the waterproof layer and the first inner shielding layers are filled with second filler. The outer side of the waterproof layer is coated with an outer shielding layer, the outer side of the outer shielding layer is coated with a flame-retardant layer, the outer side of the flame-retardant layer is coated with an inner sheath, the outer side of the inner sheath is coated with an armor layer, the outer side of the armor layer is coated with an outer sheath, and a plurality of steel wire rope woven sections which are uniformly distributed circumferentially are embedded in the outer sheath. The utility model has the advantages of good overall performance and long service life.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a DC traction combined cable for rail transit systems. Background Art

[0002] DC traction power supply in rail transit systems is a common power supply method in urban rail transit such as subways and light rails. The DC traction combined cable is a power transmission cable used to connect a DC traction substation and a train, and it is responsible for delivering electrical energy from the power supply point to the electric vehicle. At present, there are still some problems with the DC traction cables applied to rail transit systems. The cable has a single function and generally only has the function of transmitting power, without a signal control function. When laying the cable during construction, it is necessary to lay power cables and control cables separately, increasing the laying amount of the project. In addition, when multiple cables are used at the same time, a large amount of space is occupied, and the outer sheath of the cable is generally a pure rubber structure, and the tensile and wear-resistant properties need to be improved. Summary of the Invention

[0003] The utility model aims to solve the deficiencies of the prior art and provides a DC traction combined cable for rail transit systems.

[0004] To achieve the above object, the utility model adopts the following technical solutions: A DC traction combined cable for rail transit systems includes two pairs of power cores, two pairs of signal cores, and one ground core. It also includes a cross-shaped rubber partition. The two pairs of power cores and the two pairs of signal cores are respectively placed in the four card slots of the rubber partition, and the ground core is placed in the center of the rubber partition. A first inner shielding layer is coated outside one pair of power cores and one pair of signal cores. The gaps between the first inner shielding layer, the power cores, and the signal cores are filled with a first filler. The edge of the rubber partition is coated with a waterproof layer. The gap between the waterproof layer and the first inner shielding layer is filled with a second filler. Several first reinforcing ropes that abut against the end of the rubber partition are arranged side by side on the side of the second filler adjacent to the waterproof layer, and a second reinforcing rope is arranged on the side of the second filler adjacent to the angle of the rubber partition. An outer shielding layer is coated outside the waterproof layer, a flame retardant layer is coated outside the outer shielding layer, an inner sheath is coated outside the flame retardant layer, an armor layer is coated outside the inner sheath, and an outer sheath is coated outside the armor layer. Several circumferentially evenly distributed steel wire rope braided segments are embedded inside the outer sheath.

[0005] Specifically, an insulating layer is coated outside one pair of power cores, one pair of signal cores, and the ground core, and a second inner shielding layer is coated outside the insulating layer of the ground core.

[0006] Specifically, the first filler is foamed polyethylene.

[0007] Specifically, the second filler is a water blocking tape.

[0008] Specifically, the rubber partition is a chloroprene rubber partition.

[0009] The beneficial effects of the present utility model are as follows: By providing a rubber partition, the power cord, signal line, and ground wire are integrated and separately separated, which not only saves space, but also reduces interference and improves the overall performance of the cable; The setting of the first reinforcing rope and the second reinforcing rope can improve the tensile strength of the cable, enabling it to withstand greater tensile forces without damage; Improve the bending performance. The reinforcing rope can help the cable better withstand bending stress, reduce the bending radius, and prevent damage to the internal conductors; By arranging a steel wire braided section within the outer sheath, the tensile strength of the cable can be significantly increased, enabling the cable to maintain its structural integrity under large tensile forces; It can improve the structural stability of the cable, making it less likely to deform or be damaged under compression, bending, or twisting; Increase the abrasion resistance of the cable outer sheath, helping to extend the service life of the cable; Contribute to the cable maintaining its performance under harsh weather conditions, such as high temperature, low temperature, or extreme climate conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the present utility model;

[0011] In the figure: 1 - power cord core; 2 - signal line core; 3 - ground wire core; 4 - rubber partition; 5 - first inner shielding layer; 6 - first filler; 7 - waterproof layer; 8 - second filler; 9 - first reinforcing rope; 10 - second reinforcing rope; 11 - outer shielding layer; 12 - flame retardant layer; 13 - inner sheath; 14 - armor layer; 15 - outer sheath; 16 - steel wire braided section; 17 - insulating layer; 18 - second inner shielding layer;

[0012] The following will be described in detail with reference to the embodiments of the present utility model and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The present utility model will be further described below with reference to the drawings and embodiments:

[0014] As Figure 1 shown, a DC traction combined cable for a rail transit system includes two pairs of power cord cores 1, two pairs of signal line cores 2, and one ground wire core 3. It also includes a cross-shaped rubber partition 4, and the rubber partition 4 is a chloroprene rubber partition. The two pairs of power cord cores 1 and the two pairs of signal line cores 2 are respectively placed in the four card slots of the rubber partition 4, and the ground wire core 3 is placed at the center of the rubber partition 4. By providing the rubber partition 4, the power cord, signal line, and ground wire are integrated and separately separated, which not only saves space, but also reduces interference and improves the overall performance of the cable. Moreover, chloroprene rubber has good oil resistance, heat resistance, and chemical corrosion resistance, making it suitable for industrial use.

[0015] A first inner shielding layer 5 is coated on the outer sides of a pair of power line cores 1 and a pair of signal line cores 2. An insulating layer 17 is coated on the outer sides of the pair of power line cores 1, the pair of signal line cores 2, and the grounding line core 3. The insulating layer 17 is located inside the first inner shielding layer 5. A second inner shielding layer 18 is coated on the outer side of the insulating layer 17 of the grounding line core 3. The gap between the first inner shielding layer 5 and the power line cores 1 and the signal line cores 2 is filled with a first filler 6. The first filler 6 is foamed polyethylene, which has certain waterproof performance and can also reduce the weight of the cable.

[0016] A waterproof layer 7 is coated on the edge of the rubber partition 4. The gap between the waterproof layer 7 and the first inner shielding layer 5 is filled with a second filler 8. The second filler 8 is a water-blocking tape, which can effectively prevent moisture from spreading along the cable. A number of first reinforcing ropes 9 abutting against the end of the rubber partition 4 are arranged side by side on one side of the second filler 8 adjacent to the waterproof layer 7. A second reinforcing rope 10 is arranged on one side of the second filler 8 adjacent to the angle of the rubber partition 4. The arrangement of the first reinforcing rope 9 and the second reinforcing rope 10 can improve the tensile strength of the cable, enabling it to withstand greater tensile force without damage; improve the bending performance. The reinforcing ropes can help the cable better withstand the bending stress, reduce the bending radius, and avoid damage to the internal conductors.

[0017] An outer shielding layer 11 is coated on the outer side of the waterproof layer 7. A flame-retardant layer 12 is coated on the outer side of the outer shielding layer 11. An inner sheath 13 is coated on the outer side of the flame-retardant layer 12. An armor layer 14 is coated on the outer side of the inner sheath 13. An outer sheath 15 is coated on the outer side of the armor layer 14. A number of circumferentially evenly distributed steel wire rope braided segments 16 are embedded inside the outer sheath 15. The steel wire rope braided segments 16 can significantly increase the tensile strength of the cable, enabling the cable to maintain its structural integrity under the condition of bearing a large tensile force; can improve the structural stability of the cable, making it not easily deformed or damaged under the conditions of being compressed, bent, or twisted; increase the abrasion resistance of the cable outer sheath, contributing to extending the service life of the cable; contribute to the cable maintaining its performance under harsh weather conditions, such as high temperature, low temperature, or extreme climate conditions.

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0020] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] The present utility model has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various improvements are made by adopting the method concept and technical solution of the present utility model, or directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A DC traction combined cable for a rail transit system, comprising two pairs of power line cores (1), two pairs of signal line cores (2), and one ground line core (3), characterized in that, It further includes a cross-shaped rubber partition (4). Two pairs of power line cores (1) and two pairs of signal line cores (2) are respectively placed in four card slots of the rubber partition (4). The ground wire core (3) is placed at the center of the rubber partition (4). A first inner shielding layer (5) is coated on the outside of a pair of power line cores (1) and a pair of signal line cores (2). The gap between the first inner shielding layer (5) and the power line cores (1) and the signal line cores (2) is filled with a first filler (6). The edge of the rubber partition (4) is coated with a waterproof layer (7). The gap between the waterproof layer (7) and the first inner shielding layer (5) is filled with a second filler (8). A number of first reinforcing ropes (9) abutting against the end of the rubber partition (4) are arranged side by side on the side of the second filler (8) adjacent to the waterproof layer (7). A second reinforcing rope (10) is arranged on the side of the second filler (8) adjacent to the angle of the rubber partition (4). The outside of the waterproof layer (7) is coated with an outer shielding layer (11). The outside of the outer shielding layer (11) is coated with a flame retardant layer (12). The outside of the flame retardant layer (12) is coated with an inner sheath (13). The outside of the inner sheath (13) is coated with an armor layer (14). The outside of the armor layer (14) is coated with an outer sheath (15). A number of circumferentially evenly distributed steel wire braided segments (16) are embedded inside the outer sheath (15).

2. The DC traction combined cable for a rail transit system according to claim 1, wherein, An insulating layer (17) is coated on the outside of a pair of power line cores (1), a pair of signal line cores (2), and the ground wire core (3). A second inner shielding layer (18) is coated on the outside of the insulating layer (17) of the ground wire core (3).

3. The DC traction combined cable for a rail transit system according to claim 1, characterized in that, The first filler (6) is expanded polyethylene.

4. A DC traction combined cable for a rail transit system according to claim 1, characterized in that, The second filler (8) is a water blocking tape.

5. A DC traction combined cable for a rail transit system according to claim 1, characterized in that The rubber partition (4) is a neoprene rubber partition.

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