Fire-resistant 100-core composite cable

Abstract

The utility model discloses a fire-resistant 100-core composite cable, which adopts a common 100-core composite cable as a basis, and adopts a polyimide film, a mica tape, high silica glass cloth and ceramic polyolefin which are sequentially distributed from inside to outside to form a composite fire-resistant layer, the ceramic polyolefin on the outermost layer can be ceramized after being heated to form a ceramic hard shell, and the composite fire-resistant layer is formed by the ceramic polyolefin on the outermost layer. The ceramic hard shell does not melt and drop, can resist water spraying and mechanical vibration, has very good heat insulation and fire insulation effects, completely blocks a fire source and heat on the outer layer, ensures absolute completeness of the interior of the cable core, and does not cause interference to an internal cable core assembly during subsequent fire extinguishment; the internal mica tape and the high silica glass cloth maintain the stability of the internal structure of the cable at a high temperature, and the polyimide film at the innermost layer can work at 300-400 DEG C for a long time, thereby ensuring that the cable core assembly can stably transmit electric signals, and effectively solving the problem that a common 100-core composite cable does not have a function of maintaining in flame.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a fire-resistant 100-core composite cable. Background Technology

[0002] Cables are commonly used devices for transmitting power signals. In ordinary control systems, cables include control cables, twisted-pair shielded cables, etc. There are many types of cables, which are used in bundles, resulting in large overall outer diameter, heavy weight, and large space occupation of the cable bundle, making installation and operation inconvenient. The patent with publication number CN204130255U discloses a 100-core integrated cable, which breaks through the integrated structural design, meets the requirements of multi-core, multi-layer structure and multiple electrical performance, reduces the weight of the cable, reduces the outer diameter of the cable, and is easier to process than copper film shielded cables.

[0003] However, ordinary 100-core composite cables are wrapped with flame-retardant glass cloth tape, which has a certain flame-retardant effect, but does not have the ability to maintain its function in a flame. Therefore, there is a need to provide a fire-resistant 100-core composite cable that can maintain the function of power transmission or signal transmission in a flame. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a fire-resistant 100-core composite cable.

[0005] The fire-resistant 100-core composite cable provided by this utility model includes:

[0006] The cable core assembly includes a filler core, an insulating shield, a first twisted pair shield, a second twisted pair shield, a third twisted pair shield, and a power line. The center of the cable core assembly is the filler core. Five insulating shields are arranged around the filler core to form a first layer of cable core. Eleven insulating shields are arranged around the first layer of cable core to form a second layer of cable core. Eleven first twisted pair shields are arranged around the second layer of cable core to form a third layer of cable core. Five first twisted pair shields and eleven second twisted pair shields are arranged around the third layer of cable core to form a fourth layer of cable core. Two second twisted pair shields, eleven third twisted pair shields, and four power lines are arranged around the fourth layer of cable core to form a fifth layer of cable core.

[0007] The outer casing assembly includes a total shielding layer outside the cable core assembly, a composite fire-resistant layer outside the total shielding layer, and a sheath outside the composite fire-resistant layer;

[0008] The composite refractory layer comprises, from the inside out, a polyimide film, mica tape, high-silica glass cloth, and ceramicized polyolefin.

[0009] According to the technical solution provided in the embodiments of this application, the polyimide film, the mica tape, and the high-silica glass cloth are wrapped around the outside of the cable core assembly in a wrapping manner.

[0010] According to the technical solution provided in the embodiments of this application, the ceramicized polyolefin is wrapped around the high silica glass cloth by hot melt concentric extrusion.

[0011] According to the technical solution provided in the embodiments of this application, the polyimide film has a thickness of 0.035 mm, the mica tape has a thickness of 0.16 mm, the high silica glass cloth has a thickness of 0.26 mm, and the ceramicized polyolefin has a thickness of 0.8 to 1.6 mm.

[0012] According to the technical solution provided in the embodiments of this application, the cross-sectional area of ​​the insulated shielding wire is 0.35 mm². 2 The cross-sectional area of ​​the first twisted-pair shielded wire is 0.35 mm². 2 The cross-sectional area of ​​the second twisted-pair shielded wire is 0.5 mm². 2 The cross-sectional area of ​​the third twisted-pair shielded wire is 1.50 mm². 2 The cross-sectional area of ​​the power cord is 3.0 mm². 2 .

[0013] According to the technical solution provided in the embodiments of this application, the four-layer cable core is specifically arranged as follows: there are three second twisted shield wires between two first twisted shield wires, and there are two second twisted shield wires between every other two first twisted shield wires.

[0014] The five-layer cable core is specifically arranged as follows, in a clockwise direction: one third twisted pair shield wire, one power wire, two third twisted pair shield wires, one power wire, two third twisted pair shield wires, one power wire, two third twisted pair shield wires, one second twisted pair shield wire, two third twisted pair shield wires, one second twisted pair shield wire, two third twisted pair shield wires, and one power wire.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model uses a common 100-core composite cable as a base, and has requirements for multi-core, multi-layer structure and multiple electrical performance. The product is lightweight, flexible, has a wide operating temperature range, especially good low-temperature performance, and high electrical insulation performance.

[0017] Based on this, a composite fire-resistant layer is formed by sequentially distributing polyimide film, mica tape, high-silica glass cloth, and ceramicized polyolefin from the inside out. The outermost ceramicized polyolefin will ceramicize when heated, forming a ceramic-like hard shell. The ceramic-like hard shell does not melt or drip, and can resist water spray and mechanical vibration. It also has very good heat insulation and fireproofing effects, completely blocking the fire source and heat to the outer layer, ensuring the absolute integrity of the cable core, and ensuring that the characteristic impedance, attenuation, capacitance and other transmission performance of the data cable and the power cable performance are not affected. Moreover, it will not interfere with the internal cable core components during subsequent fire extinguishing. At the same time, the ceramicized polyolefin is evenly distributed by hot melt extrusion to avoid the ceramic-like hard shell being too thin in some areas and becoming fragile.

[0018] Secondly, the internal mica tape and high-silica glass cloth maintain the stability of the cable's internal structure at high temperatures, and the innermost polyimide film can work for a long time at 300℃~400℃ and has insulation properties, ensuring that the cable core assembly can stably transmit electrical signals. This effectively solves the problem that ordinary 100-core composite cables do not have the function of maintaining their integrity in flames. Furthermore, all three components adopt a composite wrapping form, which ensures the cable's flexibility while meeting fireproof and heat insulation requirements.

[0019] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a fire-resistant 100-core composite cable provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the composite fire-resistant layer in a fire-resistant 100-core composite cable provided in an embodiment of this application.

[0023] The following are the labels in the diagram: 1. Filler core; 2. Insulated shielding wire; 3. First twisted pair shielding wire; 4. Second twisted pair shielding wire; 5. Third twisted pair shielding wire; 6. Power line; 7. Overall shielding layer; 8. Composite fire-resistant layer; 81. Polyimide film; 82. Mica tape; 83. High silica glass cloth; 84. Ceramicized polyolefin; 9. Sheath; 10. Cable core assembly. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Please refer to Figures 1-2 The present invention provides a fire-resistant 100-core composite cable, comprising:

[0027] The cable core assembly 10 includes a filler core 1, an insulating shield wire 2, a first twisted pair shield wire 3, a second twisted pair shield wire 4, a third twisted pair shield wire 5, and a power line 6. The center of the cable core assembly 10 is the filler core 1. Five insulating shield wires 2 are arranged around the filler core 1 to form a first layer of cable core. Eleven insulating shield wires 2 are arranged around the first layer of cable core to form a second layer of cable core. Eleven first twisted pair shield wires 3 are arranged around the second layer of cable core to form a third layer of cable core. Five first twisted pair shield wires 3 and eleven second twisted pair shield wires 4 are arranged around the third layer of cable core to form a fourth layer of cable core. Two second twisted pair shield wires 4, eleven third twisted pair shield wires 5, and four power lines 6 are arranged around the fourth layer of cable core to form a fifth layer of cable core.

[0028] The outer casing assembly includes a total shielding layer 7 outside the cable core assembly 10, a composite fire-resistant layer 8 outside the total shielding layer 7, and a sheath 9 outside the composite fire-resistant layer 8.

[0029] The composite refractory layer 8 includes a polyimide film 81, a mica tape 82, a high silica glass cloth 83, and a ceramicized polyolefin 84, which are distributed sequentially from the inside to the outside.

[0030] This utility model uses a common 100-core composite cable as a base, and has requirements for multi-core, multi-layer structure and multiple electrical performance. The product is lightweight, flexible, has a wide operating temperature range, especially good low-temperature performance, and high electrical insulation performance.

[0031] Based on this, a composite fire-resistant layer 8 is formed by sequentially distributing polyimide film 81, mica tape 82, high silica glass cloth 83, and ceramicized polyolefin 84 from the inside out. The outermost ceramicized polyolefin 84 will ceramicize after being heated, forming a ceramic-like hard shell. The ceramic-like hard shell does not melt or drip, and can resist water spray and mechanical vibration. It also has very good heat insulation and fireproof effect, completely blocking the fire source and heat in the outer layer, ensuring the absolute integrity of the cable core, ensuring that the characteristic impedance, attenuation, capacitance and other transmission performance of the data cable and the power line performance are not affected, and will not interfere with the internal cable core components during subsequent fire extinguishing.

[0032] Secondly, the internal mica tape 82 and high silica glass cloth 83 maintain the stability of the internal structure of the cable at higher temperatures, and the innermost polyimide film 81 can work for a long time at 300℃~400℃ and has insulation properties, ensuring that the cable core assembly 10 can stably transmit electrical signals, effectively solving the problem that ordinary 100-core composite cables do not have the function of maintaining their function in flames.

[0033] In some embodiments, polyimide film 81, mica tape 82, and high-silica glass cloth 83 are wrapped around the cable core assembly 10 in a wrapping manner; all three are wrapped in a composite manner to ensure the flexibility of the cable while meeting fireproof and heat insulation requirements.

[0034] In some embodiments, the ceramicized polyolefin 84 is wrapped around the high silica glass cloth 83 by hot melt concentric extrusion; the ceramicized polyolefin is evenly distributed by hot melt extrusion to avoid local thinning that would cause the ceramic-like hard shell to be fragile.

[0035] In some embodiments, the polyimide film 81 has a thickness of 0.035 mm, the mica tape 82 has a thickness of 0.16 mm, the high silica glass cloth 83 has a thickness of 0.26 mm, and the ceramicized polyolefin 84 has a thickness of 1.2 mm. The above thicknesses are optional. If the thickness is too thick, the flexibility of the cable will be reduced, and if the thickness is too thin, the fireproof function will not be achieved. Ultimately, the cable can transmit electrical signals and transmission signals within 5 minutes under a flame at 1200°C.

[0036] In some embodiments, the cross-sectional area of ​​the insulated shielded wire 2 is 0.35 mm². 2 The cross-sectional area of ​​the first twisted shielded wire 3 is 0.35 mm². 2 The cross-sectional area of ​​the second twisted-pair shielded wire 4 is 0.5 mm². 2 The cross-sectional area of ​​the third twisted-pair shielded wire 5 is 1.50 mm². 2 The cross-sectional area of ​​power cord 6 is 3.0 mm². 2 .

[0037] In some embodiments, the four-layer cable core is specifically arranged such that three second twisted shield wires 4 are provided between two first twisted shield wires 3, and two second twisted shield wires 4 are provided between every other two first twisted shield wires 3.

[0038] The five-layer cable core is arranged as follows, in a clockwise direction: one third twisted pair shield wire 5, one power wire 6, two third twisted pair shield wires 5, one power wire 6, two third twisted pair shield wires 5, one power wire 6, two third twisted pair shield wires 5, one second twisted pair shield wire 4, two third twisted pair shield wires 5, one second twisted pair shield wire 4, two third twisted pair shield wires 5, and one power wire 6.

[0039] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fire resistant 100 core composite cable characterised in that, It includes: The cable core assembly (10) includes a filling core (1), an insulated shielded wire (2), a first twisted pair shielded wire (3), a second twisted pair shielded wire (4), a third twisted pair shielded wire (5) and a power line (6), the cable core assembly (10) is centered on the filling core (1), the filling core (1) is provided with five insulated shielded wires (2) to form a layer of cable core, the layer of cable core is provided with eleven insulated shielded wires (2) to form a two-layer cable core, the two-layer cable core is provided with eleven first twisted pair shielded wires (3) to form a three-layer cable core, the three-layer cable core is provided with five first twisted pair shielded wires (3) and eleven second twisted pair shielded wires (4) to form a four-layer cable core, and the four-layer cable core is provided with two second twisted pair shielded wires (4), eleven third twisted pair shielded wires (5) and four power lines (6) to form a five-layer cable core; The outer sleeve assembly includes a total shielding layer (7) outside the cable core assembly (10), a composite fire-resistant layer (8) outside the total shielding layer (7), and a sheath (9) outside the composite fire-resistant layer (8); The composite fire-resistant layer (8) includes polyimide film (81), mica tape (82), high-silica glass cloth (83) and ceramicized polyolefin (84) distributed from inside to outside.

2. The fire resistant 100 core composite cable of claim 1, wherein, The polyimide film (81), the mica tape (82) and the high-silica glass cloth (83) are wound around the cable core assembly (10) in the form of wrapping.

3. The fire resistant 100 core composite cable of claim 2, wherein, The ceramicized polyolefin (84) is wrapped outside the high-silica glass cloth (83) in the form of hot melt concentric extrusion.

4. The fire resistant 100 core composite cable of claim 3, wherein, The thickness of the polyimide film (81) is 0.035mm, the thickness of the mica tape (82) is 0.16mm, the thickness of the high-silica glass cloth (83) is 0.26mm, and the thickness of the ceramicized polyolefin (84) is 0.8-1.6mm.

5. The fire resistant 100 core composite cable of claim 1, wherein, The cross-sectional area of the insulated shielded wire (2) is 0.35 mm 2 , the cross-sectional area of the first twisted shielded wire (3) is 0.35 mm 2 , the cross-sectional area of the second twisted shielded wire (4) is 0.5 mm 2 , the cross-sectional area of the third twisted shielded wire (5) is 1.50 mm 2 , and the cross-sectional area of the power supply wire (6) is 3.0 mm 2 .

6. The fire resistant 100 core composite cable of claim 1, wherein, The four-layer cable core is specifically arranged with three second twisted pair shielded wires (4) between two first twisted pair shielded wires (3), and two second twisted pair shielded wires (4) between every two first twisted pair shielded wires (3). The five-layer cable core is specifically arranged in the clockwise direction with one third twisted pair shielded wire (5), one power line (6), two third twisted pair shielded wires (5), one power line (6), two third twisted pair shielded wires (5), one power line (6), two third twisted pair shielded wires (5), one second twisted pair shielded wire (4), two third twisted pair shielded wires (5), one second twisted pair shielded wire (4), two third twisted pair shielded wires (5), and one power line (6).

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