Leakage cable

Abstract

The invention provides a leakage cable which comprises the components of a first cable group which is provided with a first leakage section; the second cable group is arranged adjacent to the first cable group, a transmission section and a second leakage section are arranged on the second cable group, the second leakage section is located on the downstream of the transmission direction of the transmission section, the first leakage section and the second leakage section are arranged in a staggered mode, and the transmission section and the first leakage section are arranged correspondingly; wherein the first cable group comprises a first cable and a second cable, and the first leakage section is arranged on the first cable and the second cable; and / or, the second cable group comprises a third cable and a fourth cable, the transmission section is arranged on the third cable and the fourth cable, and the second leakage section is arranged on the third cable and the fourth cable. According to the technical scheme, the problem that the cost of the leakage cable is high in order to reduce conductor loss when the length of the leakage cable is fixed in the prior art is effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and more particularly, to a leaky cable. Background Art

[0002] In modern high-speed railway systems, to ensure the safety of train operation and the continuity of communication, a complex communication network is deployed inside high-speed railway tunnels. Among them, leaky cables are a key communication device. Leaky cables allow electromagnetic waves to leak out in a predetermined direction, forming a continuous radiation field. However, this design inevitably brings conductor losses. Under the condition that the diameter of the leaky cable is constant, the conductor loss is proportional to the length of the leaky cable. This means that in high-speed railway tunnels, due to the long length of the leaky cable, the conductor loss when using the leaky cable will increase significantly, thereby affecting the quality and coverage of signal transmission.

[0003] Moreover, due to the strict layout of equipment in high-speed railway tunnels, the minimum distance between two adjacent communication devices cannot be adjusted arbitrarily. In this way, it is restricted that between two adjacent communication devices in the tunnel, a sufficiently long leaky cable must be used to connect the devices, thus exacerbating the problem of conductor loss.

[0004] In related technologies, to reduce the problem of increased conductor loss caused by the increase in the length of the leaky cable, the common practice is to increase the diameter of the leaky cable. Although the increase in the diameter of the leaky cable can effectively reduce the conductor loss and improve the signal transmission efficiency, it also significantly increases the material cost and manufacturing cost of the leaky cable. In high-speed railway tunnels, due to the need for a large number of leaky cables, the increase in the diameter of the leaky cable will directly lead to a sharp rise in the construction cost of the entire communication network. Summary of the Invention

[0005] The main object of the present invention is to provide a leaky cable to solve the problem that when the length of the leaky cable in related technologies is fixed, in order to reduce conductor loss, the cost of the leaky cable is relatively high.

[0006] To achieve the above object, the present invention provides a leaky cable, including: a first cable group, on which a first leakage section is provided; a second cable group, arranged adjacent to the first cable group, on which a transmission section and a second leakage section are provided, the second leakage section being located downstream of the transmission direction of the transmission section, the first leakage section being arranged in a staggered manner with the second leakage section, and the transmission section being arranged corresponding to the first leakage section; wherein, the first cable group includes a first cable and a second cable, and the first leakage section is provided on the first cable and the second cable; and / or, the second cable group includes a third cable and a fourth cable, the transmission section is provided on the third cable and the fourth cable, and the second leakage section is provided on the third cable and the fourth cable.

[0007] Further, the transmission section is located on a side of the first leakage section that is away from the leakage direction of the first leakage section.

[0008] Furthermore, the leakage cable also includes a protective cover arranged on the outside of the first cable group and the second cable group. The second cable group, the inner wall of the protective cover and the end of the first cable group form a hollow area. In the extension direction of the first cable group, the hollow area and the second leakage section are arranged side by side.

[0009] Further, the hollow area is located on one side of the second leakage section facing the leakage direction of the second leakage section.

[0010] Further, when the first cable group includes a first cable and a second cable, the first leakage section is arranged on the first cable and the second cable, and the second cable group includes a third cable and a fourth cable, the transmission section is arranged on the third cable and the fourth cable, and the second leakage section is arranged on the third cable and the fourth cable; the leakage cable also includes a protective cover, the first cable and the second cable are arranged adjacent to each other in the protective cover, the third cable and the fourth cable are arranged adjacent to each other in the protective cover, the third cable is located on the side of the second cable away from the leakage direction of the second cable, and the fourth cable is located on the side of the first cable away from the leakage direction of the first cable.

[0011] Further, the length of the first cable group is shorter than the length of the second cable group.

[0012] Further, the length of the first leakage section is greater than the length of the second leakage section.

[0013] Further, the ratio of the length of the first leakage section to the length of the second leakage section is X, and 100%≤X≤200%.

[0014] Further, when the first cable group includes a first cable and a second cable, and the first leakage section is arranged on the first cable and the second cable, a first slot is opened on the first cable, a second slot is opened on the second cable, and the axis of the first slot forms an angle with the axis of the second slot; when the second cable group includes a third cable and a fourth cable, the transmission section is arranged on the third cable and the fourth cable, and the second leakage section is arranged on the third cable and the fourth cable, a third slot is opened on the third cable, a fourth slot is opened on the fourth cable, and the axis of the third slot forms an angle with the axis of the fourth slot.

[0015] Further, when the first cable group includes a first cable and a second cable, the first leakage section is arranged on the first cable and the second cable, and the second cable group includes a third cable and a fourth cable, the transmission section is arranged on the third cable and the fourth cable, and the second leakage section is arranged on the third cable and the fourth cable; the diameters of the first cable, the second cable, the third cable and the fourth cable are all the same; and / or the leakage directions of the first cable, the second cable, the third cable and the fourth cable are all the same.

[0016] Applying the technical solution of the present invention, the leaky cable includes a first cable group and a second cable group. A first leaky section is provided on the first cable group. The second cable group is arranged adjacent to the first cable group. A transmission section and a second leaky section are provided on the second cable group. The second leaky section is located downstream in the transmission direction of the transmission section. The first leaky section and the second leaky section are arranged in a staggered manner, and the transmission section is arranged corresponding to the first leaky section. In this way, in the transmission direction in the high-speed rail tunnel, electromagnetic waves can leak out from the first leaky section of the first cable group, and then electromagnetic waves leak out from the second leaky section of the second cable group downstream. The first leaky section and the second leaky section leak alternately to provide stable communication in the high-speed rail tunnel. Moreover, the arrangement of the transmission section facilitates the staggered arrangement of the first leaky section and the second leaky section. The arrangement of the transmission section also reduces the conductor loss of the second cable group, enabling a lower conductor loss when the length of the second cable group increases, thereby reducing the requirement for the diameter of the second cable group, and further reducing the cost of the leaky cable. By arranging the first leaky section on the first cable group and arranging the second leaky section of the second cable group downstream in the transmission direction, the length of the first cable group is reduced, thereby reducing the conductor loss and the diameter of the first cable group, and further reducing the cost of the leaky cable. Therefore, the technical solution of the present application effectively solves the problem that when the length of the leaky cable in the related art is fixed, the cost of the leaky cable is relatively high in order to reduce the conductor loss. Wherein, the first cable group includes a first cable and a second cable, and the first leaky section is provided on the first cable and the second cable; and / or, the second cable group includes a third cable and a fourth cable, the transmission section is provided on the third cable and the fourth cable, and the second leaky section is provided on the third cable and the fourth cable. The arrangement of the first cable and the second cable can enhance the signal strength of the first cable group, ensure uniform signal coverage in the tunnel, and improve the communication quality. The arrangement of the third cable and the fourth cable can enhance the signal strength of the second cable group, ensure uniform signal coverage in the tunnel, and improve the communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1 shows a schematic diagram of the leaky cable when it is laid flat after being axially cut open according to an embodiment of the leaky cable of the present invention;

[0019] Figure 2 shows Figure 1 a cross-sectional view of the first leaky section of the leaky cable;

[0020] Figure 3 shows Figure 1A cross-sectional view showing the leakage directions of the first cable and the second cable at the first leakage section of the leaky cable;

[0021] Figure 4 shows Figure 1 A cross-sectional view at the second leakage section of the leaky cable.

[0022] Among them, the above-mentioned drawings include the following reference numerals:

[0023] 10, the first cable group; 11, the first cable; 111, the first slot; 12, the second cable; 121, the second slot; 13, the first leakage section;

[0024] 20, the second cable group; 21, the third cable; 211, the third slot; 22, the fourth cable; 221, the fourth slot; 23, the second leakage section; 24, the transmission section;

[0025] 30, the protective sleeve;

[0026] 40, the hollow area. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0030] In this embodiment, as Figures 1 to 4 shown, the leaky cable includes a first cable group 10 and a second cable group 20. A first leaky section 13 is provided on the first cable group 10. The second cable group 20 is disposed adjacent to the first cable group 10. A transmission section 24 and a second leaky section 23 are provided on the second cable group 20. The second leaky section 23 is located downstream of the transmission direction of the transmission section 24. The first leaky section 13 and the second leaky section 23 are arranged in a staggered manner, and the transmission section 24 is arranged corresponding to the first leaky section 13. Among them, the first cable group 10 includes a first cable 11 and a second cable 12, and the first leaky section 13 is provided on the first cable 11 and the second cable 12. The second cable group 20 includes a third cable 21 and a fourth cable 22, the transmission section 24 is provided on the third cable 21 and the fourth cable 22, and the second leaky section 23 is provided on the third cable 21 and the fourth cable 22.

[0031] In this way, in the transmission direction in the high-speed railway tunnel, electromagnetic waves can be leaked from the first leakage section 13 of the first cable group 10, and then the electromagnetic waves are leaked from the second leakage section 23 of the second cable group 20 downstream. The first leakage section 13 and the second leakage section 23 take over the leakage, providing stable communication in the high-speed railway tunnel. In addition, the setting of the transmission section 24 facilitates the staggered setting of the first leakage section 13 and the second leakage section 23, and the setting of the transmission section 24 also reduces the conductor loss of the second cable group 20, so that when the length of the second cable group 20 increases, there can be lower conductor loss, thereby reducing the requirements of the second cable group 20 for the diameter, and further reducing the cost of the leakage cable. The first leakage section 13 is set on the first cable group 10, and the second leakage section 23 of the second cable group 20 is set downstream in the transmission direction, which reduces the length of the first cable group 10, thereby reducing the conductor loss and the diameter of the first cable group 10, thereby reducing the cost of the leakage cable. Therefore, the technical solution of the present application effectively solves the problem that when the length of the leakage cable in the related art is certain, the cost of the leakage cable is high in order to reduce the conductor loss. The arrangement of the first cable 11 and the second cable 12 can enhance the signal strength of the first cable group 10, ensure that the signal is evenly covered in the tunnel, and improve the communication quality. The arrangement of the third cable 21 and the fourth cable 22 can enhance the signal strength of the second cable group 20, ensure that the signal is evenly covered in the tunnel, and improve the communication quality.

[0032] In other embodiments, the arrangement of the first cable 11 and the second cable 12 can enhance the signal strength of the first cable group 10, ensure uniform signal coverage in the tunnel, and improve communication quality. The second cable group 20 includes a third cable 21 and a fourth cable 22, the transmission section 24 is arranged on the third cable 21 and the fourth cable 22, and the second leakage section 23 is arranged on the third cable 21 and the fourth cable 22.

[0033] like Figures 1 to 4 As shown, the transmission section 24 is located on the side of the first leakage section 13 that is away from the leakage direction of the first leakage section 13. Such a layout can reduce the interference of the transmission section 24 on the electromagnetic waves leaked from the first leakage section 13, ensure the signal separation of the transmission section 24 and the first leakage section 13, improve the clarity and stability of signal transmission, and thus optimize the overall communication network.

[0034] like Figures 1 to 4As shown, the leaky cable also includes a protective cover 30 sleeved on the outside of the first cable group 10 and the second cable group 20. The design of the protective cover 30 provides physical protection for the first cable group 10 and the second cable group 20, reducing the damage of the first cable group 10 and the second cable group 20 by the external environment. The second cable group 20, the inner side wall of the protective cover 30 and the end of the first cable group 10 form a hollow area 40, and in the extension direction of the first cable group 10, the hollow area 40 is arranged side by side with the second leaky section 23. The setting of the hollow area 40 not only reduces the interference with the electromagnetic waves leaked from the second leaky section 23, ensuring the stable transmission and reception of the signal, but also reduces the length and materials of the first cable group 10, reducing the cost of the leaky cable.

[0035] like Figures 1 to 4 As shown, the hollow area 40 is located on the side of the second leakage section 23 facing the leakage direction of the second leakage section 23. Setting the hollow area 40 on the side of the leakage direction of the second leakage section 23 can effectively guide the flow of electromagnetic waves, reduce the reflection and interference of electromagnetic waves inside the protective cover 30, and improve the efficiency of signal transmission.

[0036] like Figures 1 to 4 As shown, when the first cable group 10 includes the first cable 11 and the second cable 12, the first leakage section 13 is arranged on the first cable 11 and the second cable 12, and the second cable group 20 includes the third cable 21 and the fourth cable 22, the transmission section 24 is arranged on the third cable 21 and the fourth cable 22, and the second leakage section 23 is arranged on the third cable 21 and the fourth cable 22; the leakage cable also includes a protective cover 30, the first cable 11 and the second cable 12 are arranged adjacent to each other in the protective cover 30, the third cable 21 and the fourth cable 22 are arranged adjacent to each other in the protective cover 30, the third cable 21 is located on the side of the second cable 12 away from the leakage direction of the second cable 12, and the fourth cable 22 is located on the side of the first cable 11 away from the leakage direction of the first cable 11. In this way, the third cable 21 is arranged on the side of the second cable 12 away from the leakage direction of the second cable 12, which can reduce the interference of the third cable 21 on the electromagnetic waves leaked from the second cable 12. The fourth cable 22 is arranged on the side of the first cable 11 away from the leakage direction of the first cable 11, which can reduce the interference of the fourth cable 22 with the electromagnetic waves leaked from the first cable 11. By arranging the first cable group 10 and the second cable group 20 in layers in the protective cover 30, the interference between the electromagnetic waves leaked from the first cable group 10 and the second cable group 20 can be reduced, while ensuring the continuity and uniformity of signal coverage, providing a more reliable solution for wireless communication in high-speed railway tunnels.

[0037] like Figures 1 to 4As shown, the length of the first cable group 10 is less than that of the second cable group 20. In this way, not only is the interference of the first cable group 10 on the electromagnetic waves leaked from the second leakage section 23 reduced, ensuring stable signal transmission and reception, but also the length and material consumption of the first cable group 10 are reduced, lowering the cost of the leakage cable. This design can also optimize the layout of the leakage cable and the signal leakage pattern. The first cable group 10, as the signal source, can be set at a position closer to the device, while the increased length of the second cable group 20 can enhance the depth of signal coverage, reduce the demand for large-diameter cables, and thus lower the overall cost.

[0038] As Figures 1 to 4 shown, the length of the first leakage section 13 is greater than that of the second leakage section 23. Since the first leakage section 13 is located upstream in the signal transmission direction, the energy attenuation in the first leakage section 13 is smaller, which means that a longer first leakage section 13 can be set to cover a wider area without significantly increasing signal loss, thereby enhancing the stability and coverage of the signal in the proximal area. Compared with the second leakage section 23, the first leakage section 13 can transmit more signal energy with lower loss. Therefore, the longer first leakage section 13 can utilize the energy of the signal source more efficiently, reduce energy waste, and improve the overall communication efficiency. In a high-speed rail tunnel, the distance between devices is not adjustable. The longer first leakage section 13 can better adapt to this limitation. By designing a longer first leakage section 13 on the first cable group 10 close to the signal source, the limitation in the length of the subsequent cable groups can be compensated, and uniform signal distribution in the tunnel can be achieved. By optimizing the length of the first leakage section 13, the length requirement of the second cable group 20 can be reduced, and the overall length of the leakage cable used can be controlled, thereby lowering the cost of the leakage cable.

[0039] As Figures 1 to 4 shown, the ratio of the length of the first leakage section 13 to the length of the second leakage section 23 is X, where 100% ≤ X ≤ 200%. By controlling the length ratio X of the first leakage section 13 to the second leakage section 23, X can be finely adjusted within the range of 100% to 200% to meet the requirements of different tunnel lengths and device layouts. This flexibility can optimize the signal leakage efficiency, reduce conductor loss, and ensure the stability and reliability of the entire communication network.

[0040] Preferably, X is 100%, 110%, 120%, 130%, 140%, 150%, 160%, 170%, 180%, 190%, and 200%.

[0041] As Figures 1 to 4As shown, when the first cable group 10 includes the first cable 11 and the second cable 12, and the first leakage section 13 is provided on the first cable 11 and the second cable 12, a first slot 111 is formed on the first cable 11, and a second slot 121 is formed on the second cable 12. The axis of the first slot 111 forms an angle with the axis of the second slot 121. By forming the first slot 111 and the second slot 121 with axes at an angle on the first cable 11 and the second cable 12, the polarization modes of the first cable 11 and the second cable 12 can be made different to form two independent signal streams. This dual-stream design or multi-stream design significantly improves the signal transmission capacity and stability and is applicable to high-density communication environments. When the second cable group 20 includes the third cable 21 and the fourth cable 22, the transmission section 24 is provided on the third cable 21 and the fourth cable 22, and the second leakage section 23 is provided on the third cable 21 and the fourth cable 22, a third slot 211 is formed on the third cable 21, and a fourth slot 221 is formed on the fourth cable 22. The axis of the third slot 211 forms an angle with the axis of the fourth slot 221. By forming the third slot 211 and the fourth slot 221 with axes at an angle on the third cable 21 and the fourth cable 22, the polarization modes of the third cable 21 and the fourth cable 22 can be made different to form two independent signal streams. This dual-stream design significantly improves the signal transmission capacity and stability and is applicable to high-density communication environments.

[0042] As Figures 1 to 4 shown, when the first cable group 10 includes the first cable 11 and the second cable 12, the first leakage section 13 is provided on the first cable 11 and the second cable 12, and the second cable group 20 includes the third cable 21 and the fourth cable 22, the transmission section 24 is provided on the third cable 21 and the fourth cable 22, and the second leakage section 23 is provided on the third cable 21 and the fourth cable 22; the diameters of the first cable 11, the second cable 12, the third cable 21, and the fourth cable 22 are all the same. The leakage directions of the first cable 11, the second cable 12, the third cable 21, and the fourth cable 22 are all the same. The design with the same diameter and the same leakage direction not only simplifies the production process and reduces the manufacturing cost, but also ensures the uniformity and consistency of signal leakage and improves the stability of the communication network. The consistency of the diameters optimizes the conductor loss inside the cables, and the unified leakage direction ensures the stable transmission of signals. High-quality wireless signals can be obtained regardless of the position in the tunnel.

[0043] In other embodiments, the diameters of the first cable 11, the second cable 12, the third cable 21, and the fourth cable 22 are all the same. Alternatively, the leakage directions of the first cable 11, the second cable 12, the third cable 21, and the fourth cable 22 are all the same.

[0044] Applying the technical solution of this embodiment, the diameter of the first cable 11 can be reduced by 20% compared with the leaky cable in the prior art, and the coverage distance of the first cable 11 can be doubled compared with the leaky cable in the prior art. Therefore, a better coverage effect than the leaky cable in the prior art can be obtained.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0046] For the convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "above other devices or structures" will then be positioned as "below other devices or structures" or "beneath other devices or structures". Thus, the exemplary term "above..." can include both orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations should be made for the spatial relative descriptions used here.

[0047] In addition, it should be noted that using words such as "first", "second" to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, these words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0048] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A leaky cable, characterized in that, include: A first cable group (10), wherein a first leakage section (13) is provided on the first cable group (10); a second cable group (20) arranged adjacent to the first cable group (10); a transmission section (24) and a second leakage section (23) are arranged on the second cable group (20); the second leakage section (23) is located downstream of the transmission direction of the transmission section (24); the first leakage section (13) and the second leakage section (23) are arranged in a staggered manner; and the transmission section (24) and the first leakage section (13) are arranged correspondingly; The first cable group (10) comprises a first cable (11) and a second cable (12), and the first leakage section (13) is arranged on the first cable (11) and the second cable (12); and / or the second cable group (20) comprises a third cable (21) and a fourth cable (22), the transmission section (24) is arranged on the third cable (21) and the fourth cable (22), and the second leakage section (23) is arranged on the third cable (21) and the fourth cable (22).

2. The leaky cable according to claim 1, wherein The transmission section (24) is located on a side of the first leakage section (13) that is away from the leakage direction of the first leakage section (13).

3. The leaky cable according to claim 1, wherein, The leakage cable further comprises a protective cover (30) sleeved on the outside of the first cable group (10) and the second cable group (20); the second cable group (20), the inner side wall of the protective cover (30) and the end of the first cable group (10) form a hollow area (40); in the extension direction of the first cable group (10), the hollow area (40) and the second leakage section (23) are arranged side by side.

4. The leaky cable according to claim 3, characterized in that, The hollow area (40) is located on one side of the second leakage section (23) facing the leakage direction of the second leakage section (23).

5. The leaky cable according to claim 1, characterized in that: When the first cable group (10) includes a first cable (11) and a second cable (12), the first leakage section (13) is arranged on the first cable (11) and the second cable (12), and the second cable group (20) includes a third cable (21) and a fourth cable (22), the transmission section (24) is arranged on the third cable (21) and the fourth cable (22), and the second leakage section (23) is arranged on the third cable (21) and the fourth cable (22); The leakage cable further comprises a protective cover (30), the first cable (11) and the second cable (12) being arranged adjacent to each other in the protective cover (30), the third cable (21) and the fourth cable (22) being arranged adjacent to each other in the protective cover (30), the third cable (21) being located on a side of the second cable (12) facing away from a leakage direction of the second cable (12), and the fourth cable (22) being located on a side of the first cable (11) facing away from a leakage direction of the first cable (11).

6. The leaky cable according to claim 1, wherein The length of the first cable group (10) is shorter than the length of the second cable group (20).

7. The leaky cable according to claim 1, wherein The length of the first leakage section (13) is greater than the length of the second leakage section (23).

8. The leaky cable according to claim 1, characterized in that, The ratio of the length of the first leakage section (13) to the length of the second leakage section (23) is X, where 100% ≤ X ≤ 200%.

9. The leaky cable according to claim 1, wherein when the first cable group (10) includes a first cable (11) and a second cable (12), and the first leakage section (13) is disposed on the first cable (11) and the second cable (12), a first slot (111) is formed in the first cable (11), a second slot (121) is formed in the second cable (12), and the axis of the first slot (111) forms an angle with the axis of the second slot (121); when the second cable group (20) includes a third cable (21) and a fourth cable (22), the transmission section (24) is disposed on the third cable (21) and the fourth cable (22), and the second leakage section (23) is disposed on the third cable (21) and the fourth cable (22), a third slot (211) is formed in the third cable (21), a fourth slot (221) is formed in the fourth cable (22), and the axis of the third slot (211) forms an angle with the axis of the fourth slot (221).

10. The leaky cable according to claim 1, wherein when the first cable group (10) includes a first cable (11) and a second cable (12), the first leakage section (13) is disposed on the first cable (11) and the second cable (12), and the second cable group (20) includes a third cable (21) and a fourth cable (22), the transmission section (24) is disposed on the third cable (21) and the fourth cable (22), and the second leakage section (23) is disposed on the third cable (21) and the fourth cable (22); the diameters of the first cable (11), the second cable (12), the third cable (21), and the fourth cable (22) are the same; and / or the leakage directions of the first cable (11), the second cable (12), the third cable (21), and the fourth cable (22) are the same.

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