Early warning communication optical fiber composite mineral insulation fireproof cable

Abstract

The utility model discloses an early-warning communication optical fiber composite mineral insulated fireproof cable, which comprises communication optical cables, cable cores and a fireproof protective layer, a filling layer is arranged in an inner cavity of the fireproof protective layer, and at least one group of cable cores and one group of communication optical cables are arranged in the filling layer. And the fireproof protection layer is provided with a wrapping layer, a protection layer and an outer sheath from inside to outside in sequence. The at least one group of communication cables is arranged in the cables, the second optical cable and / or the first optical cable are arranged according to the sectional area of the cables, the operation conditions of the cables are monitored in real time through the optical cables, when the sectional area is increased, the two groups of communication optical cables can improve the sensitivity of the communication optical cables, and the monitoring result is more stable. In addition, the fireproof protection layer is arranged on the outer side of the cable, so that the cable has good optical communication capability and good high temperature resistance and combustion resistance. In combination with a fireproof early warning system or monitoring equipment, disaster situations can be found in time and early warning is carried out at the initial stage of a fire, and time guarantee is provided for escape and disaster relief.

Description

Technical Field

[0001] The utility model belongs to the technical field of fireproof cables, in particular to an early warning communication optical fiber composite mineral insulated fireproof cable. Background Art

[0002] With the rapid development of my country's social economy, there are more and more important engineering facilities such as subways, tunnels, power plants, nuclear power plants, and crowded places such as large supermarkets and exhibition centers. With the rise of the Internet of Things, the market has put forward new demands for special optical fiber composite cables that integrate multi-network integration functions such as telecommunications, power transmission, television, Internet, and the Internet of Things, making them an important component in the construction of smart grids, and putting forward requirements for the safety performance of cables in the event of fire.

[0003] Although fireproof cables provide fireproof capabilities, they are basically passive fireproof. Even if they provide power for a certain period of time after a fire, they cannot effectively predict or monitor in real time. If fireproofing combined with early warning equipment can achieve the effect of fire early warning and ensure the normal operation of optical fiber communication, it can save a lot of costs. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a technical solution of an early warning communication optical fiber composite mineral insulated fireproof cable which can provide fire warning, realize fire prevention and ensure normal optical fiber communication.

[0005] The early warning communication optical fiber composite mineral insulated fireproof cable comprises a communication optical cable, a cable core and a fireproof protective layer. A filling layer is arranged in the inner cavity of the fireproof protective layer. At least one group of cable cores and one group of communication optical cables are arranged in the filling layer. The fireproof protective layer is provided with a wrapping layer, a protective layer and an outer sheath in sequence from the inside to the outside.

[0006] Furthermore, a group of cable cores and a group of communication optical cables are arranged in the filling layer. The communication optical cables are second optical cables. The second optical cables are cabled with the cable cores to form a single-core cable.

[0007] Furthermore, the cross-sectional area of ​​a single-core cable is 10-400mm 2 .

[0008] Furthermore, multiple groups of cable cores and a group of communication optical cables are arranged in the filling layer. The communication optical cable is the second optical cable, which is cabled to form a multi-core cable. The cable cores are evenly distributed. The second optical cable is arranged in the center of the filling layer, and the cable cores are arranged on the outside of the second optical cable.

[0009] Furthermore, the cross-sectional area of ​​the multi-core cable is 10-50mm 2 .

[0010] Furthermore, multiple groups of cable cores and two groups of communication optical cables are arranged in the filling layer. The communication optical cables wrap the first optical cable and the second optical cable. The first optical cable is arranged in the center of the filling layer, and the second optical cable is arranged close to the fire protection layer to form a multi-core cable.

[0011] Furthermore, the cross-sectional area of ​​the multi-core cable is 50-400mm 2 .

[0012] Furthermore, the cable core comprises a conductor, and the outer side of the conductor is coated with a mica tape and an insulating layer in sequence.

[0013] Furthermore, the second optical cable is provided with a tight-buffered optical fiber, a glass fiber yarn, a stainless steel braided mesh and a sheath in sequence from the inside to the outside.

[0014] Furthermore, the first optical cable is provided with tight-buffered optical fiber, glass fiber yarn, stainless steel braided mesh, spiral armor and sheath in sequence from inside to outside.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] By setting at least one group of communication cables in the cable, and setting a second optical cable and / or a first optical cable according to the cross-sectional area of ​​the cable, the operation of the cable can be monitored in real time through the optical cables. When the cross-sectional area increases, the two groups of communication optical cables can enhance the sensitivity of the communication optical cables, and the monitoring results are more stable.

[0017] In addition, a fireproof protective layer is set on the outside of the cable, which makes the cable have good optical communication capabilities and good high temperature and combustion resistance. Combined with fire warning systems or monitoring equipment, the disaster can be discovered and warned in time at the early stage of the fire, providing time guarantee for escape and disaster relief. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cable structure of Example 1;

[0019] Figure 2 This is a schematic diagram of the cable structure of Example 2;

[0020] Figure 3 This is a schematic diagram of the cable structure of Example 3;

[0021] Figure 4 is a schematic diagram of the structure of the first optical cable;

[0022] Figure 5 This is a schematic diagram of the second optical cable structure.

[0023] In the figure: 100 communication optical cable; 101 tight-buffered optical fiber; 102 glass fiber yarn; 103 stainless steel braided mesh; 104 spiral armor; 105 sheath;

[0024] 110 first optical cable; 120 second optical cable;

[0025] 200 cable core; 201 conductor; 202 mica tape; 203 insulation layer;

[0026] 300 fire protection layer; 301 wrapping layer; 302 protective layer; 303 outer sheath;

[0027] 400 infill layers. DETAILED DESCRIPTION

[0028] The utility model will be further described below in conjunction with the accompanying drawings.

[0029] Example 1

[0030] Combination Figure 1 and Figure 5 As shown, an early warning communication optical fiber composite mineral insulated fireproof cable includes a communication optical cable 100, a cable core 200 and a fireproof protective layer 300. A filling layer 400 is arranged in the inner cavity of the fireproof protective layer 300. A group of cable cores 200 and a group of communication optical cables 100 are arranged in the filling layer 400. The communication optical cable is a second optical cable 120. The second optical cable 120 and the cable core 200 are cabled to form a single-core cable. The cross-sectional area of ​​the single-core cable is 10-400mm 2 The cable core 200 includes a conductor 201, and the outer side of the conductor 201 is covered with a mica tape 202 and an insulating layer 203 in sequence. The second optical cable 120 is provided with a tight-buffered optical fiber 101, a glass fiber yarn 102, a stainless steel braided mesh 103 and a sheath 105 in sequence from the inside to the outside. The fire protection layer 300 is provided with a wrapping layer 301, a protective layer 302 and an outer sheath 303 in sequence from the inside to the outside.

[0031] The communication optical cable 100 has an early warning and monitoring optical fiber unit part, which, combined with a fire warning system or monitoring equipment, can promptly detect the disaster and issue an early warning at the early stage of a fire, thus providing time guarantee for escape and disaster relief.

[0032] The principle of the optical fiber monitoring technology in the communication optical cable 100 used for early warning is the working principle of distributed optical fiber. Specifically, the distributed optical fiber temperature measurement system is a sensing system for real-time rapid multi-point temperature measurement and measurement of spatial temperature field distribution. It is a distributed, continuous, functional optical fiber temperature measurement system, that is, in the system, the optical fiber is not only used as a detection unit but also as a transmission unit. The system mainly uses the two principles of Raman scattering and optical time domain reflection to achieve the functions of temperature measurement and positioning: the temperature effect of optical fiber back Raman scattering is used to measure the temperature field where the optical fiber is located in real time; the optical time domain reflection technology (OTOR) can be used to accurately locate the measurement point.

[0033] The conductor 201 is a copper conductor, and the mica tape 202 is made of high-quality synthetic double-sided mica tape or single-sided reinforced mica tape, with a fire resistance level of 950-1000℃, while the insulation layer 203 is made of ceramic polyolefin insulation material, which can reach a crust shape after reaction at 400℃ when fire-resistant. The optical fiber in the communication optical cable 100 is a class A1a multimode optical fiber, which is cabled with the cable core 200 in the filling layer 400. The filling layer 400 uses low-smoke halogen-free rope. The burning layer 301 in the fire protection layer 300 is made of low-smoke halogen-free flame-retardant fire-resistant tape material, which is tightly wrapped with the fire-resistant tape to effectively protect the optical cable from damage. The protective layer 302 is made of ceramic polyolefin fire-resistant material, which is squeezed into the outer layer of the cable core to protect the insulating core. The outer sheath 303 is made of halogen-free low-smoke flame-retardant polyolefin material, which is flame-retardant, waterproof, and has a protective effect during construction. A more preferred embodiment is to add a wrapping layer between the protective layer 302 and the outer sheath 303, and wrap a layer of fire-resistant tape around the outer layer of the protective layer 302 to enhance the protective effect.

[0034] Example 2

[0035] Combination Figure 2 and Figure 5 Compared with Example 1, the difference is that a warning communication optical fiber composite mineral insulated fireproof cable, a plurality of cable cores 200 and a group of communication optical cables 100 are arranged in the filling layer 400, the communication optical cable 100 is a second optical cable 120, and the cable is formed into a multi-core cable, the cable cores 200 are evenly arranged, the second optical cable 120 is arranged in the center of the filling layer 400, and the cable cores 200 are arranged in a ring outside the second optical cable 120. In addition, the cross-sectional area of ​​the multi-core cable in Example 2 is 10-50mm 2 .

[0036] Example 3

[0037] Combination Figure 3-5 Compared with Example 2, the difference is that, in an early warning communication optical fiber composite mineral insulated fireproof cable, a plurality of cable cores 200 and two communication optical cables 100 are arranged in the filling layer 400, the communication optical cable wraps the first optical cable 110 and the second optical cable 120, the first optical cable 110 is arranged at the center of the filling layer 400, and the second optical cable 120 is arranged near the fireproof protective layer 300, and the cable is formed into a multi-core cable. At this time, the cross-sectional area of ​​the multi-core cable is 50-400mm 2 The first optical cable 110 is provided with a tight-buffered optical fiber 101, a glass fiber yarn 102, a stainless steel braided mesh 103, a spiral armor 104 and a sheath 105 in sequence from the inside to the outside.

[0038] When in use, the fireproof cable disclosed in the present application has excellent fire resistance. The flame temperature of the cable is not less than 950°C under the rated working voltage, and the fuse is continuous within the fire supply time of 180 minutes. And it is extremely economical, with a rationally designed structure and the selection of suitable fire-resistant and fireproof materials, which not only meets the needs of cable fire resistance, but also considers material selection, structural dimensions, and electrical performance, while achieving the purpose of reducing costs. In addition, the materials are all free of heavy metals, non-toxic, and tasteless, have no effect on the human body and the environment, are waterproof and oil-resistant, and are environmentally friendly. Finally, the cable has good thermal insulation, with a thermal conductivity of 0.09W / Mk, and especially the interior after ablation is uniformly honeycombed, with better fire resistance and thermal insulation.

Claims

1. An early warning communication optical fiber composite mineral insulated fireproof cable, comprising a communication optical cable (100), a cable core (200) and a fireproof protective layer (300), characterized in that A filling layer (400) is arranged in the inner cavity of the fireproof protective layer (300), and the fireproof protective layer (300) is provided with a wrapping layer (301), a protective layer (302) and an outer sheath (303) in sequence from the inside to the outside; A plurality of cable cores (200) and two groups of communication optical cables (100) are arranged in the filling layer. The communication optical cables include a first optical cable (110) and a second optical cable (120). The first optical cable (110) is arranged at the center of the filling layer (400), and the second optical cable (120) is arranged close to the fire protection layer (300). The cables are connected to form a multi-core cable.

2. The early warning communication optical fiber composite mineral insulated fireproof cable according to claim 1 is characterized in that The cross-sectional area of ​​multi-core cables is 50-400mm 2 .

3. The early warning communication optical fiber composite mineral insulated fireproof cable according to claim 1 or 2, characterized in that The cable core (200) comprises a conductor (201), and the outer side of the conductor (201) is sequentially coated with a mica tape (202) and an insulating layer (203).

4. The early warning communication optical fiber composite mineral insulated fireproof cable according to claim 1 or 2, characterized in that The second optical cable (120) is provided with a tight-buffered optical fiber (101), a glass fiber yarn (102), a stainless steel braided mesh (103) and a sheath (105) in sequence from the inside to the outside.

5. The early warning communication optical fiber composite mineral insulated fireproof cable according to claim 1 or 2, characterized in that The first optical cable (110) is provided with a tight-buffered optical fiber (101), a glass fiber yarn (102), a stainless steel braided mesh (103), a spiral armor (104) and a sheath (105) in sequence from the inside to the outside.

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