Composite central beam tube type flame-retardant cable

Abstract

The utility model discloses a composite central beam tube type flame-retardant cable, which comprises an outer sheath and an inner core, a plurality of fiber cores are arranged in the center of the inner core, a loose tube is wrapped outside the fiber cores, power line conductors are arranged on two sides of the loose tube, a power sheath is wrapped outside the power line conductors, a steel-plastic composite belt is arranged on the surface of the inner core, and the steel-plastic composite belt is arranged on the surface of the inner core. Reinforcing steel wires are further arranged on the two sides of the inner core, a flame-retardant sleeve is further arranged between the outer sheath and the inner core, a plurality of flame-retardant filling capsules are arranged in the flame-retardant sleeve, cable paste is filled in gaps between the loose tube and the fiber core, a plastic coating layer is further arranged between the outer sheath and the flame-retardant sleeve, and the plastic coating layer is arranged between the outer sheath and the flame-retardant sleeve. The flame-retardant filling capsule comprises a capsule shell made of heat-sensitive plastic, the capsule shell is internally provided with a perfluorohexanone fire extinguishing solution, the flame-retardant filling capsule improves the flame-retardant performance of the cable, the solution released by the flame-retardant filling capsule can effectively prevent combustion and flame spreading, and the combustion risk is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of center beam tube type cables, specifically a kind of composite center beam tube type flame-retardant cable. BACKGROUND

[0002] The normal operation of network service generally requires cable to solve two problems: one is the power supply of the device itself, and the second is the transmission of data. However, the installation environment of some devices is relatively complex, such as small base stations, video monitoring cameras, etc. It is difficult to find a suitable power socket in the installation environment, and it is difficult to power the device. The power line and optical fiber are combined together in the optical fiber composite cable, which can effectively solve the problems of broadband access, device power supply and signal transmission. At the same time, it can save space and cost, and improve the transmission efficiency. It is an ideal optical fiber access method. The optical fiber composite cable is a cable that combines optical fiber and wire (copper core). It is a communication cable that combines the characteristics of optical cable and cable. It can be powered and connected to the network by laying one cable. The number of optical fiber cores is generally 2-144, and the voltage of the cable is 48-110V. Large and super-large data centers are increasing, and the requirement for low smoke and flame-retardant performance of indoor wiring cables is higher.

[0003] When the cable is used, in order to meet the use requirements in high temperature environment and environment where fire may exist, the flame-retardant performance of the cable needs to be good. However, the existing cable still has the following disadvantages in actual use, such as poor flame-retardant performance. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a kind of composite center beam tube type flame-retardant cable to solve the above technical problems.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a kind of composite center beam tube type flame-retardant cable, including outer sheath and inner core, the inner core center is provided with a plurality of fiber cores, the fiber core is covered with a loose tube, the loose tube is provided with power line conductor on both sides, the power line conductor is covered with power sheath outside, the inner core surface is provided with steel-plastic composite belt, the inner core both sides are also provided with reinforcing steel wire, the outer sheath and inner core are also provided with flame-retardant sleeve between, the flame-retardant sleeve is provided with a plurality of flame-retardant filling capsules inside, the loose tube and the fiber core are filled with cable paste in the gap between, the outer sheath and flame-retardant sleeve are also provided with plastic coating between, the flame-retardant filling capsule includes capsule shell made of heat-sensitive plastic, and the capsule shell is provided with perfluorohexanone fire extinguishing solution inside.

[0006] Preferably, the plastic coating is a plastic-coated aluminum strip.

[0007] Preferably, the flame-retardant sleeve is made of silane self-crosslinking low-smoke halogen-free flame-retardant polyolefin material.

[0008] Preferably, the outer sheath is an integrated structure made of soft silica gel material, and the outer sheath is coated with a fireproof coating layer made of PVC material.

[0009] Preferably, a water blocking layer is further arranged between the inner core and the steel-plastic composite belt.

[0010] Preferably, the power line conductor is an oxygen-free copper power line conductor.

[0011] Preferably, the cable paste is a fiber paste.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] By arranging the flame-retardant sleeve and the internal flame-retardant filling capsule, the flame-retardant performance of the cable is improved, the smoke release amount during fire is effectively reduced, the solution released by the flame-retardant filling capsule can effectively prevent combustion and flame spreading, the use of the fiber paste improves the insulation performance inside the cable, the air inside the cable is reduced, the risk of combustion is further reduced, the fiber core and the power line conductor are arranged at the same time, the optical communication and power transmission functions are integrated in one cable, and the wiring complexity and space occupation are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Fig. 1 It is a cross section schematic view of a composite center bundle pipe type flame-retardant cable of the embodiment;

[0016] Fig. 2 It is a flat expansion structure diagram of the flame-retardant sleeve of the embodiment;

[0017] Fig. 3 It is an internal structure diagram of the flame-retardant filling capsule of the embodiment.

[0018] In the drawings, the component list represented by each sign is as follows:

[0019] 1, outer sheath;2, inner core;3, fiber core;4, loose sleeve;5, power line conductor;6, power sheath;7, steel-plastic composite belt;8, reinforcing steel wire;9, flame-retardant sleeve;10, flame-retardant filling capsule;11, cable paste;12, plastic coating layer;13, capsule shell;14, perfluorohexanone fire extinguishing solution;15, fireproof coating layer;16, water blocking layer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figs. 1-3 The utility model provides a kind of technical scheme: a composite center beam tube type flame-retardant cable, including outer sheath 1 and inner core 2, inner core 2 center is provided with several fiber cores 3, fiber core 3 is covered with loose tube 4, loose tube 4 both sides are provided with power line conductor 5, power line conductor 5 is covered with power sheath 6 outside, inner core 2 surface is provided with steel-plastic composite tape 7, inner core 2 both sides are also provided with reinforcing steel wire 8, outer sheath 1 and inner core 2 between are also provided with flame-retardant sleeve 9, flame-retardant sleeve 9 is provided with several flame-retardant filling capsules 10 inside, loose tube 4 and the gap between fiber core 3 are filled with cable paste 11, outer sheath 1 and flame-retardant sleeve 9 between are also provided with plastic coating 12, flame-retardant filling capsule 10 includes the capsule shell 13 made of heat-sensitive plastic, capsule shell 13 is provided with perfluorocyclohexanone fire extinguishing solution 14 inside.

[0022] Specifically, plastic coating 12 is plastic-coated aluminum strip, the use of plastic-coated aluminum strip not only improves the tensile strength of the cable, but also enhances the corrosion resistance of the cable, prolongs the service life of the cable.

[0023] Further, flame-retardant sleeve 9 is made of silane self-crosslinking low-smoke halogen-free flame-retardant polyolefin material, which does not produce dense smoke and toxic gas during high-temperature combustion, reducing harmful smoke and gas emissions during fire.

[0024] Specifically, outer sheath 1 is made of soft silicone material in an integrated structure, and outer sheath 1 is coated with a fireproof coating layer 15 on the surface, and fireproof coating layer 15 is made of PVC material. Soft silicone material not only has good flexibility and high and low temperature resistance, but also further enhances the safety protection of the cable in high temperature environment by adding fireproof coating layer 15.

[0025] Further, water barrier layer 16 is provided between inner core 2 and steel-plastic composite tape 7, which can effectively prevent water from entering and protect the internal structure of the cable from the influence of humid environment.

[0026] Specifically, the power line conductor 5 is an oxygen-free copper power line conductor 5, through the oxygen-free copper power line conductor 5, the conductive performance of the cable is more excellent, and the oxygen-free copper material has good corrosion resistance and high temperature resistance, thereby further improving the stability and service life of the cable. The use of the oxygen-free copper power line conductor 5 ensures low resistance loss of the cable when transmitting large current, thereby improving the overall power transmission efficiency.

[0027] Further, the cable paste 11 is a fiber paste, the use of the fiber paste can not only effectively fill the gap between the fiber core 3 and the loose tube 4, but also can absorb moisture and humidity to a certain extent, prevent the erosion of the fiber core 3 by the moisture, thereby ensuring the transmission performance and stability of the cable. The selection of the fiber paste can effectively avoid performance fluctuations caused by environmental changes during long-term use of the cable, and the reduction of air in the cable further reduces the risk of burning.

[0028] In summary, the above structure design improves the flame retardant performance of the cable, effectively reduces the smoke release amount when the fire occurs, and when the cable burns, the cable can quickly respond when the fire occurs. The capsule shell 13 of the flame-retardant filling capsule 10 is a heat-sensitive plastic, such as a hard polyvinyl chloride material, the shell will be damaged after burning, the perfluorohexanone fire extinguishing solution 14 is rapidly released at high temperature, effectively inhibits the spread of the flame, and can absorb the heat generated during the operation of the cable to a certain extent, further improves the safety performance of the cable. At the same time, through the special design of the outer sheath 1, the loose tube 4, the power sheath 6 and the reinforcing steel wire 8, the mechanical protection ability of the cable is enhanced, the service life is prolonged, the use of the fiber paste improves the insulation performance of the cable, the air in the cable is reduced, the risk of burning is further reduced, the fiber core 3 and the power line conductor 5 are arranged at the same time, so that the optical communication and power transmission functions are integrated in one cable, and the complexity and space occupation of wiring are reduced.

[0029] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In the utility model, unless another definite provision and limitation, the term "installation", "arrangement", "connection", "fixation", "screw connection" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation, for the ordinary skill of the person of the art, can understand the above-mentioned term in the utility model specific meaning according to specific circumstances.

[0031] Although the embodiments of the utility model have been shown and described, it will be appreciated by those of ordinary skill in the art that changes can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A composite central bundle tube flame retardant cable, characterized by: The invention comprises an outer sheath (1) and an inner core (2), wherein a plurality of fiber cores (3) are arranged at the center of the inner core (2), the outer surface of the fiber core (3) is covered with a loose tube (4), power line conductors (5) are arranged on both sides of the loose tube (4), the outer surface of the power line conductor (5) is covered with a power sheath (6), a steel-plastic composite tape (7) is arranged on the surface of the inner core (2), reinforcing steel wires (8) are also arranged on both sides of the inner core (2), and a steel-plastic composite tape (7) is arranged between the outer sheath (1) and the inner core (2). A flame retardant sleeve (9) is provided, a plurality of flame retardant filling capsules (10) are provided inside the flame retardant sleeve (9), a cable paste (11) is filled in the gap between the loose tube (4) and the fiber core (3), a plastic coating layer (12) is provided between the outer sheath (1) and the flame retardant sleeve (9), the flame retardant filling capsule (10) includes a capsule shell (13) made of heat-sensitive plastic, and a perfluorohexanone fire extinguishing solution (14) is provided inside the capsule shell (13).

2. The composite central bundle tube flame retardant cable according to claim 1, characterized in that: The plastic-coated layer (12) is a plastic-coated aluminum strip.

3. The composite central bundle tube flame retardant cable according to claim 1, characterized in that: The flame retardant sleeve (9) is made of silane self-crosslinking low-smoke halogen-free flame retardant polyolefin material.

4. The composite central bundle tube flame retardant cable according to claim 1, characterized in that: The outer sheath (1) is an integrated structure made of soft silicone material. The surface of the outer sheath (1) is coated with a fire retardant coating layer (15), and the fire retardant coating layer (15) is made of PVC material.

5. The composite central bundle tube flame retardant cable according to claim 1, characterized in that: A water-blocking layer (16) is also provided between the inner core (2) and the steel-plastic composite belt (7).

6. The composite central bundle tube flame retardant cable according to claim 1, characterized in that: The power line conductor (5) is an oxygen-free copper power line conductor.

7. The composite central bundle tube flame retardant cable according to claim 1, characterized in that: The cable paste (11) is a fiber paste.

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