A bend-resistant, flame-retardant cable

Abstract

The utility model relates to a kind of bending-resistant flame-retardant cable in cable field, including support core and wire group, wrapping layer, inner sheath, flame-retardant layer and outer sheath that are successively wrapped in the outside of support core from inside to outside, filling is equipped between the wrapping layer and the wire group, and armor layer is equipped between the flame-retardant layer and the outer sheath.The support core is composed of core body and flexible sleeve that is sleeved in the outside of the core body.The outside of the flexible sleeve is surrounded with the limiting slot matched with the wire group.The utility model is closely combined by wrapping layer, inner sheath, flame-retardant layer and outer sheath, so that support core and wire group are combined, so that cable has good waterproof and flame-retardant performance.Meanwhile, by the cooperation of support core and armor layer, the bending-resistant capacity of cable is improved, the fracture caused by frequent bending is effectively prevented, the service life is prolonged, and the stable operation of system is ensured.

Description

Technical Field

[0001] This utility model relates to the field of cables, specifically to a flame-retardant cable that is resistant to bending. Background Technology

[0002] Cables, also known as power cables, are devices that transmit electrical energy or signals through conductive materials. Due to their excellent transmission performance and stable structure, they are widely used in various fields such as power, communications, and transportation. Existing cables include various types, such as flame-retardant cables and waterproof cables, each with different functions. Flame-retardant cables, through their special flame-retardant materials, effectively protect the cable's safety in high-temperature environments such as fires, thus ensuring that the transmission of power and signals is not affected in emergency situations, improving the overall reliability and safety of the system.

[0003] While existing flame-retardant cables possess flame-retardant properties, their lack of bending resistance makes them prone to breakage or damage in environments with frequent bending, thus reducing their lifespan and stability and affecting the normal operation of the system. Therefore, this invention proposes a bend-resistant flame-retardant cable. Summary of the Invention

[0004] This invention provides a flame-retardant cable that is resistant to bending. By combining the support core with the armor layer, it solves the problem that existing flame-retardant cables are prone to breakage under frequent bending.

[0005] The objective of this utility model is achieved through the following means:

[0006] A bend-resistant flame-retardant cable includes a support core and, from the inside out, a conductor group, a wrapping layer, an inner sheath, a flame-retardant layer, and an outer sheath, which are sequentially wrapped around the outside of the support core. A filler is provided between the wrapping layer and the conductor group, and an armor layer is provided between the flame-retardant layer and the outer sheath.

[0007] Furthermore, the support core consists of a core body and a flexible sleeve fitted over the outside of the core body.

[0008] Furthermore, the outer side of the flexible sleeve is provided with a limiting groove that mates with the wire assembly.

[0009] Furthermore, the conductor group consists of several conductive wires, which are arranged around the outside of the support core.

[0010] Furthermore, the conductive wire includes a conductor and a conductive shielding layer, an insulating layer, and a metal shielding layer that are sequentially wrapped around the outside of the conductor from the inside out.

[0011] Furthermore, the flame retardant layer is a halogen-containing flame retardant layer or a halogen-free low-smoke flame retardant layer.

[0012] Furthermore, the outer sheath has several annular grooves on its outer side, and these annular grooves are linearly distributed along the length of the outer sheath.

[0013] The beneficial effects of this utility model are as follows: By tightly integrating the supporting core and the conductor assembly through the wrapping layer, inner sheath, flame-retardant layer, and outer sheath, the cable possesses excellent waterproof and flame-retardant properties. Simultaneously, the cooperation between the supporting core and the armor layer enhances the cable's resistance to bending, effectively preventing breakage caused by frequent bending, extending its service life, and ensuring stable system operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a bend-resistant flame-retardant cable according to the present invention;

[0015] Figure 2 for Figure 1 Enlarged diagram of A in the middle;

[0016] Figure 3 This is a cross-sectional view of a flame-retardant cable resistant to bending according to the present invention.

[0017] The reference numerals in the figure are as follows: 1-support core, 11-core body, 12-flexible sleeve, 121-limiting groove, 2-conductor group, 21-conducting wire, 211-conductor, 212-conducting shielding layer, 213-insulation layer, 214-metal shielding layer, 3-wrapping layer, 4-inner sheath, 5-flame retardant layer, 6-outer sheath, 61-annular groove, 7-filler, 8-armoring layer. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] In this embodiment, refer to Figure 1 - Figure 3 The present invention relates to a type of flame-retardant cable with bending resistance, comprising a support core 1 and, from the inside out, a conductor group 2, a wrapping layer 3, an inner sheath 4, a flame-retardant layer 5, and an outer sheath 6 wrapped around the support core 1. A filler 7 is provided between the wrapping layer 3 and the conductor group 2, and an armor layer 8 is provided between the flame-retardant layer 5 and the outer sheath 6. Both the inner sheath 4 and the outer sheath 6 are made of high-temperature resistant and wear-resistant plastic materials to ensure stable operation of the cable in high-temperature environments. The double-layer design of the inner and outer sheaths 6 effectively improves the cable's protective performance. When the outer sheath 6 is damaged, the inner sheath 4 still provides secondary protection, ensuring that the internal structure of the cable is not damaged. The armor layer 8, while ensuring the cable's bending resistance, also prevents rodent and ant infestation, improving the cable's durability and safety.

[0020] When using cables, different types of armor layers 8 can be selected according to actual needs. When the cable needs to be directly buried or used in a static environment, a steel tape armor layer 8 can be selected to enhance its compressive strength. When the cable needs to be used in situations requiring frequent bending, such as in mobile equipment, a highly flexible armor layer 8, such as aluminum alloy interlocking armor, can be selected to adapt to the needs of frequent bending. By reasonably selecting different armor layers 8, the cable can maintain excellent performance in different application scenarios, extend its service life, reduce maintenance costs, and improve the overall system stability.

[0021] The support core 1 consists of a core body 11 and a flexible sleeve 12 fitted around the outside of the core body 11. A limiting groove 121, which mates with the conductor assembly 2, is provided around the outer side of the flexible sleeve 12. The core body 11 can be made of metal or elastic material. When the core body 11 is made of metal, it can evenly distribute stress and improve bending resistance; when made of elastic material, it has good resilience while resisting bending, thus being suitable for a wider range of dynamic environments. The flexible sleeve 12 is made of high-temperature resistant, high-strength synthetic rubber material, which can effectively buffer external impacts while maintaining flexibility, ensuring that the cable can still bend flexibly in complex environments and extending its service life. The limiting groove 121 on the outer side of the flexible sleeve 12 fixes the conductor assembly 2 in a specific position, preventing the conductor assembly 2 from shifting during bending, thus avoiding mutual compression and potential damage to the internal structure or short circuit.

[0022] The conductor assembly 2 consists of several conductive wires 21, which are arranged around the outside of the support core 1. The conductive wires 21, through the cooperation of the wrapping layer 3 and the filler 7, are tightly fitted with the limiting groove 121, ensuring that the conductive wires 21 do not shift when bent, thus maintaining signal transmission stability. Each conductive wire 21 includes a conductor 211 and, from the inside out, a conductive shielding layer 212, an insulating layer 213, and a metal shielding layer 214, sequentially wrapped around the conductor 211. The conductive shielding layer 212, insulating layer 213, and metal shielding layer 214 effectively isolate external electromagnetic interference, ensuring high efficiency and stability of signal transmission. The insulating layer 213 uses a high-insulation-performance material to prevent short circuits between the conductive wires 21, improving safety. The metal shielding layer 214 further shields electromagnetic waves, enhancing anti-interference capabilities and enabling the cable to maintain excellent transmission performance even in complex electromagnetic environments.

[0023] The flame-retardant layer 5 can be either a halogen-containing flame-retardant layer 5 or a halogen-free low-smoke flame-retardant layer 5. Halogen-containing flame-retardant layers 5 effectively inhibit flame spread by releasing free radicals to interrupt the combustion chain reaction; however, they release harmful gases during combustion, making them suitable for industrial environments. Halogen-free low-smoke flame-retardant layers 5 decompose and absorb heat during combustion, generating an insulating layer, making them suitable for densely populated areas and improving safety. When using this type of layer, the appropriate flame-retardant layer 5 should be selected based on the application environment to ensure that the cable effectively resists flames in the event of a fire without causing secondary harm to the environment and personnel, thus improving overall safety performance.

[0024] The outer sheath 6 has several annular grooves 61 on its outer side, which are linearly distributed along the length of the outer sheath 6. The annular grooves 61 allow the outer sheath 6 to better distribute stress when bent, reduce local wear, enhance tear resistance, and extend service life. At the same time, the groove design helps dissipate heat, reduces the internal temperature of the cable, and further improves overall performance.

[0025] The beneficial effects of this utility model are as follows: By tightly combining the supporting core 1 and the conductor group 2 through the wrapping layer 3, inner sheath 4, flame-retardant layer 5, and outer sheath 6, the cable has excellent waterproof and flame-retardant properties. At the same time, the cooperation between the supporting core 1 and the armor layer 8 improves the cable's resistance to bending, effectively prevents breakage caused by frequent bending, extends service life, and ensures stable system operation.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A flame-retardant cable resistant to bending, characterized in that, It includes a support core (1) and a conductor group (2), a wrapping layer (3), an inner sheath (4), a flame retardant layer (5), and an outer sheath (6) that are wrapped around the outside of the support core (1) from the inside out. A filler (7) is provided between the wrapping layer (3) and the conductor group (2), and an armor layer (8) is provided between the flame retardant layer (5) and the outer sheath (6).

2. The flame-retardant cable with bending resistance according to claim 1, characterized in that: The support core (1) consists of a core body (11) and a flexible sleeve (12) sleeved on the outside of the core body (11).

3. The flame-retardant cable with bending resistance according to claim 2, characterized in that: The flexible sleeve (12) is surrounded by a limiting groove (121) that cooperates with the conductor group (2).

4. A flame-retardant cable resistant to bending according to any one of claims 1-3, characterized in that: The conductor group (2) consists of a plurality of conductive wires (21), which are arranged around the outside of the support core (1).

5. The flame-retardant cable with bending resistance according to claim 4, characterized in that: The conductive wire (21) includes a conductor (211) and a conductive shielding layer (212), an insulating layer (213), and a metal shielding layer (214) that are wrapped around the conductor (211) from the inside out.

6. The flame-retardant cable with bending resistance according to claim 1, characterized in that: The flame retardant layer (5) is a halogen-containing flame retardant layer (5) or a halogen-free low-smoke flame retardant layer (5).

7. The flame-retardant cable with bending resistance according to claim 1, characterized in that: The outer sheath (6) has several annular grooves (61) on its outer side, and the several annular grooves (61) are linearly distributed along the length direction of the outer sheath (6).

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