High-reliability rail transit jumper control cable

Abstract

The utility model discloses a kind of high-reliability rail transit with jumper control cable, the cable includes cable core, the cable core includes several sub cable core, the sub cable core is circular structure, specifically including 2 identical specifications half-round sector insulated wire core, the half-round sector insulated wire core includes sector conductor, the sector conductor periphery is covered with insulating layer, the cable core periphery is sequentially covered with unified package insulating layer, metal shielding layer and outer protective layer from inside to outside.The utility model cable has stable characteristic impedance, anti-interference, reliable guarantee.

Description

Technical Field

[0001] This utility model relates to a control cable, specifically a high-reliability interlocking control cable for rail transit with a voltage of 1000 volts and below. Background Technology

[0002] The reliable operation of the interlocking system in rail transit is the last line of defense for the traction power supply system. When conventional relay protection fails, the fault current is cut off through the linkage of adjacent substations. This system is crucial to the power supply safety of subways and high-speed railways. The core function of the interlocking control cable is to transmit trip signals, including transmitting trip commands and realizing communication interlocking between substations. In terms of physical structure, the shielding characteristics and dual-channel redundancy design of the cable need to be emphasized, which are the key to anti-interference. However, since the inner pair of conventional interlocking control cables is made of two identical circular insulated cores twisted together, the position between the pairs changes during the splicing process, resulting in instability and unevenness in the pair structure. This causes coupling effects on the electrical parameters of the signals between the pairs, which may cause malfunctions in the transmission of signal commands, thus failing to guarantee the reliable operation of the system. Summary of the Invention

[0003] In order to solve the above problems, this utility model provides a high-reliability interlocking control cable for rail transit.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A high-reliability interlocking control cable for rail transit is characterized in that the cable includes a cable core, the cable core includes several sub-cores, each sub-core has a circular structure, specifically including two semi-circular fan-shaped insulated wire cores of the same specification, each semi-circular fan-shaped insulated wire core includes a fan-shaped conductor, the fan-shaped conductor is covered with an insulation layer, and the cable core is covered with a total insulation layer, a metal shielding layer and an outer sheath from the inside out.

[0005] In a preferred embodiment of this utility model, the insulation layer of the semi-circular fan-shaped insulated wire core has a bottom plane, and the bottom planes of the two semi-circular fan-shaped insulated wire cores in the split cable core are attached and abutted together, thereby forming a circular structure of the split cable core.

[0006] In a preferred embodiment of this utility model, the conductor is a type 1 solid conductor, a type 2 stranded conductor, or a type 5 soft copper conductor that conforms to the requirements of GB / T 3956 standard.

[0007] In a preferred embodiment of this utility model, the insulating layer has a semi-circular annular structure.

[0008] In a preferred embodiment of this utility model, the overall insulation layer is made of polyester tape wrapped around the cable core.

[0009] In a preferred embodiment of this utility model, the metal shielding layer is formed by copper wire braiding, copper strip overlapping and wrapping, or aluminum-plastic composite strip overlapping and wrapping.

[0010] In a preferred embodiment of this utility model, the outer protective layer can be an extruded halogen-free, low-smoke, flame-retardant polyolefin sheath, or a composite structure of a halogen-free, low-smoke, polyolefin oxygen barrier layer + a metal armor layer + a halogen-free, low-smoke, flame-retardant polyolefin sheath.

[0011] The beneficial effects of this utility model are: The cable of this utility model has stable characteristic impedance, anti-interference ability, and reliable protection. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is an example cross-sectional view of the high-reliability rail transit interlocking control cable in this utility model embodiment. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0015] See Figure 1 The diagram shows an example of the configuration of the high-reliability rail transit jump control cable provided by this utility model.

[0016] As shown in the figure, the high-reliability interlocking control cable for rail transit provided in this example is mainly used for transmitting trip commands and realizing accurate and reliable signal transmission for communication interlocking between substations. It includes a cable core 200, which includes several sub-cores 100. Each sub-core 100 has a circular structure and specifically includes two semi-circular fan-shaped insulated wire cores 110 of the same specification. Each insulated wire core 110 includes a fan-shaped conductor 111. The fan-shaped conductor 111 is covered with an insulation layer 112. The cable core 200 is covered from the inside out with a total insulation layer 300, a metal shielding layer 400, and an outer sheath 500.

[0017] The cable core 200 is formed by concentrically twisting several sub-cable cores 100 together. The twisting direction of the cable core 200 and the sub-cable cores 100 is the same. This structure makes the interaction force between the sub-cable cores 100 small and the structure stable.

[0018] The branch core 100 has a circular structure, consisting of two identical semi-circular fan-shaped insulated wire cores 110 twisted together. The insulation layer of each semi-circular fan-shaped insulated wire core 110 has a bottom plane. The bottom planes of the two semi-circular fan-shaped insulated wire cores 110 are attached and pressed together, thus forming a circular structure for the branch core 100. The twisting pitch of each branch core 100 is different and there is no multiple relationship between them. This structure makes each branch core 100 very stable. The characteristic impedance of different branch cores 100 is different, so the branch cores 100 will not interfere with each other, ensuring accurate and reliable signal transmission between wire pairs.

[0019] The sector conductor 111 is a solid conductor of type 1, stranded conductor of type 2, or soft copper conductor of type 5, conforming to the requirements of GB / T 3956 standard.

[0020] The insulating layer 112 has a semi-circular ring structure.

[0021] The overall insulation layer 200 is made of polyester tape wrapped around the cable core 100.

[0022] The metal shielding layer 300 is made of copper wire braiding, copper strip overlapping wrapping, or aluminum-plastic composite strip overlapping wrapping, and the shielding structure has good resistance to external signal interference.

[0023] The outer sheath 400 can be an extruded halogen-free, low-smoke, flame-retardant polyolefin sheath, or a composite structure of a halogen-free, low-smoke, polyolefin oxygen barrier layer + a metal armor layer + a halogen-free, low-smoke, flame-retardant polyolefin sheath.

[0024] In addition, when there are large gaps between the sub-cores 100 in the cable core 200, polypropylene filler can be used to fill them to make them round. In order to prevent the position of the two semi-circular fan-shaped insulated wire cores 110 in the sub-core 100 from changing, polyester tape can be used to tie and fix the sub-core 100.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-reliability interlocking control cable for rail transit, characterized in that, The cable includes a cable core, which includes several sub-cores. Each sub-core has a circular structure and specifically includes two semi-circular fan-shaped insulated wire cores of the same specification. Each semi-circular fan-shaped insulated wire core includes a fan-shaped conductor, and the fan-shaped conductor is covered with an insulation layer. The two semi-circular fan-shaped insulated wire cores in each sub-core are tied and fixed together. The cable core is covered with a general insulation layer, a metal shielding layer, and an outer sheath from the inside out.

2. The high-reliability interlocking control cable for rail transit according to claim 1, characterized in that, The insulation layer of the semi-circular fan-shaped insulated wire core has a bottom plane. The bottom planes of the two semi-circular fan-shaped insulated wire cores in the branch cable core are attached and abutted together, so that the branch cable core forms a circular structure.

3. The high-reliability interlocking control cable for rail transit according to claim 1, characterized in that, The conductor is a solid conductor of type 1, a stranded conductor of type 2, or a soft copper conductor that meets the requirements of GB / T 3956 standard.

4. The high-reliability interlocking control cable for rail transit according to claim 1, characterized in that, The insulating layer has a semi-circular ring structure.

5. A high-reliability interlocking control cable for rail transit according to claim 1, characterized in that, The overall insulation layer consists of polyester tape wrapped around the cable core in an overlapping manner.

6. A high-reliability interlocking control cable for rail transit according to claim 1, characterized in that, The metal shielding layer is made of copper wire braiding, copper strip overlapping wrapping, or aluminum-plastic composite strip overlapping wrapping.

7. A high-reliability interlocking control cable for rail transit according to claim 1, characterized in that, The outer sheath can be an extruded halogen-free, low-smoke, flame-retardant polyolefin sheath, or a composite structure of a halogen-free, low-smoke, polyolefin oxygen barrier layer + a metal armor layer + a halogen-free, low-smoke, flame-retardant polyolefin sheath.

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