Cable with bending-resistant front end

Abstract

The utility model discloses a cable with a bending-resistant front end, which comprises cable cores, a sheath, an isolating layer and an inner shielding layer, the inner shielding layer is wrapped by the sheath, the isolating layer is wrapped by the inner shielding layer, the cable cores are wrapped by the isolating layer, and each cable core is sequentially provided with a conductor, an insulating layer and a split-phase shielding layer from inside to outside. The front end part and the rear end part of the cable core are respectively provided with a slidable protective sleeve, and the outer part of each protective sleeve is composed of a flexible metal tube and an inner insulating layer. According to the technical scheme, the special-shaped structure is arranged at the front end of the cable, so that each branch has certain protectiveness, and damage caused by external force impact can be effectively avoided; according to the technical scheme, the slidable protective sleeves are respectively arranged at the front end and the rear end of the cable core, so that later maintenance and replacement of the wiring terminal connected with the front end of the cable core are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a cable with a bending-resistant front end. Background Art

[0002] Rail transit cables refer to cables used in the power supply system of urban rail transit (such as subways, trams, etc.) systems. These cables are usually installed in the overhead or underground structures of rail transit lines to provide power to trains. Through these cables, trains can obtain the required power to operate, thereby realizing the operation of urban rail transit;

[0003] From the above brief description, it can be seen that rail transit cables are relatively safe in themselves because they are mainly installed in overhead or underground structures and are less susceptible to damage from external forces. The part that affects their safety is the connection with the electrical device, which cannot be installed overhead or buried underground. Therefore, this case provides a special type of cable for cables used in rails, transportation and similar situations. Utility Model Content

[0004] To achieve the above purpose, the utility model is implemented by the following technical scheme: comprising an outer jacket, the outer jacket is composed of a blue core cable core, a sheath, an isolation layer, and an inner shielding layer, the sheath wraps the inner shielding layer, the inner shielding layer wraps the isolation layer, the isolation layer wraps a plurality of cable cores, and the cable core has a conductor, an insulating layer, and a phase-separated shielding layer in sequence from the inside to the outside;

[0005] A slidable protective cover is provided at the front end and the rear end of the cable core, respectively, and the protective cover is composed of a metal tube on the outside and an insulating layer on the inside;

[0006] The protective sleeve is also provided with an inwardly recessed annular groove;

[0007] It also comprises a triangular prism, wherein the triangular parts of the triangular prism are respectively provided with semi-cylindrical grooves (6), a part of the protective cover can be embedded in the semi-cylindrical groove, and the triangular prism can support and protect multiple cable cores (2).

[0008] Preferably, the protective cover is a stepped hollow column, and the front cylindrical cavity can be sleeved on the wiring terminal connected to the front end of the cable core.

[0009] Preferably, the conductor is silver-plated or tin-plated copper.

[0010] Preferably, the triangular prism is made of rubber.

[0011] Preferably, the protective cover is made of rubber material.

[0012] Preferably, the inner shielding layer is tinned copper.

[0013] Beneficial Effects

[0014] The utility model provides a cable with a front end that is resistant to bending. It has the following beneficial effects: the technical solution sets a special-shaped structure at the front end of the cable, so that each branch has a certain degree of protection, which can effectively avoid damage caused by external force impact; the technical solution also facilitates the later maintenance and replacement of the wiring terminal connected to the front end of the cable core by setting a slidable protective cover at the front and rear ends of the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic structural diagram of a cable with a bending-resistant front end.

[0016] Figure 2 The utility model is a schematic diagram of a triangular prism structure of a cable with a bending-resistant front end.

[0017] Figure 3 The utility model is a schematic diagram of the protective cover structure of a cable with a bending-resistant front end.

[0018] Figure 4 The utility model is a schematic diagram of the wiring structure of a cable with a front end that is resistant to bending.

[0019] In the figure: 1, outer jacket; 2, cable core; 3, protective sleeve; 4, annular groove; 5, triangular prism; 6, semi-cylindrical groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides a technical solution: a cable with a bending-resistant front end. The technical solution takes into account that the part where the front end of the cable is connected to the terminal is more easily damaged and pulled by external force (for example, because the cable is high, when the terminal is plugged into the upper device, the weight of the lower cable will pull the electronic terminal downward), the cable core 2 is easily separated from the terminal, and the frequency of use of this part is relatively high. Based on this, the technical solution will be solved by the following technical means;

[0022] The technical solution includes a cable core 2, a sheath, an isolation layer, and an inner shielding layer. The sheath wraps the inner shielding layer, the inner shielding layer wraps the isolation layer, and the isolation layer wraps multiple cable cores 2. The cable core 2 has a conductor, an insulating layer, and a phase-separated shielding layer from the inside to the outside, and is characterized in that:

[0023] A slidable protective cover 3 is provided at the front end and the rear end of the cable core 2, and the protective cover 3 is composed of a metal tube on the outside and an insulating layer on the inside;

[0024] The protective sleeve 3 is also provided with an inwardly recessed annular groove 4;

[0025] It also includes a triangular prism 5 , wherein the triangular parts of the triangular prism 5 are respectively provided with semi-cylindrical grooves 6 , a part of the protective cover 3 can be embedded in the semi-cylindrical groove 6 , and the triangular prism 5 can support and protect the multiple cable cores 2 .

[0026] It should be noted that the external structure of the technical solution is relatively simple and ingenious. Considering that the cable construction workload is large and it is not easy to use a more complex structure, a sliding protective cover 3 is provided in this case. This protective cover 3 adopts Figure 2 The stepped structure shown in the figure has a front end that can wrap the wiring terminal, while the rear end is used to wrap the cable core 2, thereby achieving double protection for the connection between the wiring terminal and the cable core 2;

[0027] At the same time, in order to protect the force balance of the multiple cable cores 2, a triangular prism 5 is added between the protective sleeves 3 provided on each cable core 2;

[0028] The middle part of the protective sleeve 3 is embedded into the semi-cylindrical groove 6 to achieve fixation;

[0029] It should be emphasized that, in the present case, three fixing points are provided on the triangular prism 5 , but the number of fixing points can be increased according to the number of strands of the cable core 2 .

[0030] The conductor is silver-plated or tin-plated copper.

[0031] The triangular prism 5 is made of rubber.

[0032] The protective cover 3 is made of rubber material.

[0033] The inner shielding layer is tinned copper.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front-end bending-resistant cable, comprising a jacket (1), the jacket (1) being composed of a blue core cable (2), a sheath, an isolation layer, and an inner shielding layer, the sheath wraps the inner shielding layer, the inner shielding layer wraps the isolation layer, the isolation layer wraps a plurality of cable cores (2), the cable core (2) having a conductor, an insulating layer, and a phase-separated shielding layer in sequence from the inside to the outside, characterized in that: A slidable protective cover (3) is respectively provided at the front end and the rear end of the cable core (2), and the protective cover (3) is composed of a metal tube on the outside and an insulating layer on the inside; The protective sleeve (3) is also provided with an inwardly recessed annular groove (4); It also comprises a triangular prism (5), wherein the triangular parts of the triangular prism (5) are respectively provided with semi-cylindrical grooves (6), a part of the protective cover (3) can be embedded in the semi-cylindrical grooves (6), and the triangular prism (5) can support and protect the multiple cable cores (2).

2. A front-end bending-resistant cable according to claim 1, characterized in that: The protective cover (3) is a stepped hollow column, and the front cylindrical cavity can be sleeved on the wiring terminal connected to the front end of the cable core (2).

3. A front-end bending-resistant cable according to claim 1, characterized in that: The conductor is silver-plated or tin-plated copper.

4. A front-end bending-resistant cable according to claim 1, characterized in that: The triangular prism (5) is made of rubber.

5. The cable with a front end that is resistant to bending according to claim 1, characterized in that: The protective cover (3) is made of rubber material.

6. A front-end bending-resistant cable according to claim 1, characterized in that: The inner shielding layer is tinned copper.

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