Nuclear electromagnetic pulse resistant multi-core data ignition cable

Abstract

The utility model discloses an anti-nuclear electromagnetic pulse multi-core data ignition cable which comprises a first layer of cable core, a second layer of cable core is twisted outside the first layer of cable core, and a third layer of cable core is twisted outside the second layer of cable core. The third layer of cable core is wrapped by a wrapping layer, and the circumferential outer side of the wrapping layer is sequentially wrapped by an anti-electromagnetic shielding layer, an inner shielding layer, a fireproof layer, a fireproof thermal insulation layer, a first composite fireproof layer, an outer shielding layer, a second composite fireproof layer and an outer sheath. The nuclear-electromagnetic-pulse-resistant multi-core data ignition cable is good in insulation performance, resistant to high voltage, capable of guaranteeing the working time of at least 1 min in the ignition state of 1800 DEG C, capable of resisting the nuclear electromagnetic pulse of 70 dB at the same time, and good in transmission performance and nuclear-magnetic-resistance performance. The high-temperature-resistant performance is achieved through mutual assistance of different materials, and the cable has excellent nuclear power magnetic resistance under the condition of strong interference, and is soft, light in weight and convenient to use by adopting a woven alternating structure.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to a multi-core data ignition cable resistant to nuclear electromagnetic pulses. Background Technology

[0002] Currently available ignition cables have poor environmental resistance, only able to withstand high and low temperatures and high-temperature flame erosion. They cannot guarantee product usability in special environments. Furthermore, domestically produced ignition cables generally lack nuclear electromagnetic pulse resistance, instantly failing upon exposure to a nuclear pulse and preventing signal transmission, thus rendering the ignition equipment inoperable. Therefore, this application proposes a multi-core data ignition cable resistant to nuclear electromagnetic pulses, capable of both nuclear electromagnetic pulse resistance and signal transmission under high-temperature ignition conditions. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a multi-core data ignition cable that is resistant to nuclear electromagnetic pulses. This cable can not only resist nuclear electromagnetic pulses but also transmit signals under high-temperature ignition conditions. It has the characteristics of low hardness, low loss, good electrical insulation performance, good weldability, resistance to ultra-high temperature, and resistance to nuclear electromagnetic pulses.

[0004] This utility model provides a multi-core data ignition cable resistant to nuclear electromagnetic pulses, comprising a first core, a second core twisted around the first core, and a third core twisted around the second core; the third core is covered by a wrapping layer, and the wrapping layer is sequentially wrapped with an electromagnetic shielding layer, an inner shielding layer, a fireproof layer, a fireproof and heat-insulating layer, a first composite fireproof layer, an outer shielding layer, a second composite fireproof layer, and an outer sheath.

[0005] Furthermore, the first layer of cable core is composed of two data cables, two sets of first four-wire groups, one set of five-wire groups, and two sets of twisted-pair shielded wires twisted together; wherein, taking one set of the five-wire groups as the center, starting from any one of the data cables on the outer periphery of the five-wire groups, one set of first four-wire groups, one twisted-pair shielded wire, another data cable, another set of first four-wire groups, and another twisted-pair shielded wire are arranged in a clockwise direction.

[0006] Furthermore, the second layer of cable core is formed by twisting together a set of three-wire groups and eleven sets of second-four-wire groups; wherein, starting from the three-wire groups on the outer circumference of the first layer of cable core, eleven sets of second-four-wire groups are arranged in a clockwise direction.

[0007] Furthermore, the third layer of cable core is formed by twisting together four groups of first insulated single wires and four groups of second insulated single wires; wherein, the four groups of first insulated single wires and the four groups of second insulated single wires are arranged at intervals on the outer circumferential side of the second layer of cable core.

[0008] Furthermore, the three-wire group is composed of three insulated single wires twisted together; the first four-wire group and the second four-wire group are both composed of four insulated single wires twisted together; the five-wire group is composed of five insulated single wires twisted together; the twisted-pair shielded wire includes two twisted insulated single wires, and the two twisted insulated single wires are surrounded by a tinned copper wire shielding layer on their circumferential outer side; the first insulated single wire group is composed of two insulated single wires, and the second insulated single wire group is composed of three insulated single wires.

[0009] Furthermore, the insulated single wire includes a tinned copper wire conductor, and the circumferential outer side of the tinned copper wire conductor is covered with a polytetrafluoroethylene (PTFE) insulation layer.

[0010] Furthermore, the wrapping layer is made of polyimide film; the electromagnetic shielding layer is woven from high-permeability alloy wire; the inner shielding layer is woven from tin-plated copper-clad steel wire; and the outer shielding layer is woven from tin-plated copper single wire.

[0011] Furthermore, the fireproof layer is formed by wrapping calcined mica tape; both the first composite fireproof layer and the second composite fireproof layer include a layer of high-silica oxide glass cloth and a layer of calcined mica tape.

[0012] Furthermore, the fireproof and heat-insulating layer is made of ceramicized polyolefin plastic.

[0013] Furthermore, the outer sheath is a TPV elastomer sheath.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model relates to a multi-core data ignition cable resistant to nuclear electromagnetic pulses.

[0016] (1) Tinned copper wire conductor and outer shielding layer are both made of tinned round copper wire. Copper has high conductivity, which can reduce interference and ensure the signal transmission of the cable.

[0017] The polytetrafluoroethylene propylene insulation layer has excellent dielectric strength, good electrical insulation, and high temperature resistance, with the conductor's maximum operating temperature reaching 200℃.

[0018] (2) The electromagnetic shielding layer and the inner shielding layer adopt a braided combination form, with different metal materials combined to form multiple shielding reflection interfaces, which can improve the shielding effectiveness of the cable. Alloy wire is used instead of alloy tape to increase flexibility, making it easier to bend during use and more practical. The electromagnetic shielding layer composed of high magnetic permeability alloy wire has high magnetic permeability and plays a shielding role in the low frequency band. At the same time, tinned copper-clad steel wire has the characteristics of low density and light weight compared with ordinary tinned copper wire, which can reduce the weight of the cable while ensuring performance.

[0019] (3) The wrapping layer is made of polyimide film. Polyimide film is currently a high-performance film material with high and low temperature resistance, electrical insulation, and short-term temperature resistance up to 400℃.

[0020] (4) The fireproof layer uses calcined mica tape. Both the first and second composite fireproof layers are made of a layer of high silica glass cloth plus a layer of calcined mica tape. The high silica glass cloth has excellent heat resistance and can withstand temperatures up to 1400℃ for short periods. The calcined mica tape has excellent high temperature resistance and flame resistance and can withstand temperatures up to 1000℃ for short periods. The composite wrapping method is used to ensure the flexibility of the cable while meeting the requirements of fireproofing and heat insulation.

[0021] (5) The fireproof and heat-insulating layer is made of ceramicized polyolefin plastic. This material has excellent mechanical and environmental performance and excellent heat insulation performance. Under flame burning or high temperature conditions, it can generate a hard ceramic shell. The shell does not melt or drip, and can resist water spray and mechanical vibration. It also has very good heat insulation and fireproof effect.

[0022] (6) The sheath is made of TPV elastomer, which has good mechanical environmental performance, high and low temperature resistance, good flame retardant performance, wear resistance and softness.

[0023] In summary, the cable of this application has good insulation performance and high voltage resistance. It can guarantee a working time of at least 1 minute under ignition conditions at 1800℃, and its resistance to nuclear electromagnetic pulses can reach 70dB. It has good transmission performance and resistance to nuclear electromagnetic pulses.

[0024] This cable is not only resistant to nuclear electromagnetic interference, but can also transmit signals under ultra-high temperature ignition conditions. It has excellent transmission performance, low loss, and achieves high temperature resistance through the mutual assistance of different materials. It also adopts a braided alternating structure, which makes the cable have excellent anti-nuclear electromagnetic interference performance under strong interference conditions. It is flexible, lightweight, and easy to use.

[0025] It should be understood that the content described in the utility model description section is not intended to limit the key or important features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model.

[0026] Other features of this invention will become readily apparent from the following description. Attached Figure Description

[0027] 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:

[0028] Figure 1 A schematic diagram of the structure of a multi-core data ignition cable resistant to nuclear electromagnetic pulse provided in this embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of an insulated single wire;

[0030] Figure 3 This is a schematic diagram of the structure of a twisted-pair shielded cable;

[0031] Figure 4 This is a schematic diagram of the three-wire group structure;

[0032] Figure 5 This is a schematic diagram of the four-wire group structure;

[0033] Figure 6 This is a schematic diagram of the five-line group structure;

[0034] The diagram is labeled as follows: 1. First layer cable core; 110. Data cable; 120. First four-wire group; 130. Five-wire group; 140. Twisted pair shielded cable; 2. Second layer cable core; 21. Three-wire group; 22. Second four-wire group; 3. Third layer cable core; 31. First insulated single-wire group; 32. Second insulated single-wire group; 4. Wrapping layer; 5. Electromagnetic shielding layer; 6. Inner shielding layer; 7. Fireproof layer; 8. Fireproof and heat-insulating layer; 9. First composite fireproof layer; 10. Outer shielding layer; 11. Second composite fireproof layer; 12. Outer sheath; 13. Insulated single wire; 131. Tinned copper wire conductor; 132. Poly(fluoroethylene propylene) insulation layer; 14. Tinned copper wire shielding layer. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] Please refer to Figures 1-6 This utility model provides a multi-core data ignition cable resistant to nuclear electromagnetic pulses. It is a data cable used for connecting high-temperature ignition devices under strong electromagnetic interference conditions. It includes a first core 1, a second core 2 twisted around the first core 1, and a third core 3 twisted around the second core 2. The third core 3 is covered by a wrapping layer 4. The wrapping layer 4 is wrapped with an electromagnetic shielding layer 5, an inner shielding layer 6, a fireproof layer 7, a fireproof and heat-insulating layer 8, a first composite fireproof layer 9, an outer shielding layer 10, a second composite fireproof layer 11, and an outer sheath 12 in sequence on the outer periphery.

[0038] In a preferred embodiment, the first layer of cable core 1 is formed by twisting together two data cables 110, two sets of first four-wire groups 120, one set of five-wire groups 130, and two sets of twisted-pair shielded wires 140; wherein, with one set of five-wire groups 130 as the center, starting from any data cable 110 on the outer periphery of the five-wire groups 130, one set of first four-wire groups 120, one twisted-pair shielded wire 140, another data cable 110, another set of first four-wire groups 120, and another twisted-pair shielded wire 140 are arranged in a clockwise direction.

[0039] In a preferred embodiment, the second layer of cable core 2 is formed by twisting together a set of three-wire groups 21 and eleven sets of second-four-wire groups 22; wherein, starting from the three-wire group 21 on the outer circumference of the first layer of cable core 1, eleven sets of second-four-wire groups 22 are arranged in a clockwise direction.

[0040] In a preferred embodiment, the third layer of cable core 3 is formed by twisting together four groups of first insulated single wires 31 and four groups of second insulated single wires 32; wherein, the four groups of first insulated single wires 31 and four groups of second insulated single wires 32 are arranged at intervals on the outer periphery of the second layer of cable core 2.

[0041] In a preferred embodiment, the three-wire group 21 is formed by twisting three insulated single wires 13 together; the first four-wire group 120 and the second four-wire group 22 are both formed by twisting four insulated single wires 13 together; the five-wire group 130 is formed by twisting five insulated single wires 13 together; the twisted pair shielded wire 140 includes two twisted insulated single wires 13, and a layer of tinned copper wire shielding layer 14 is woven around the outer circumference of the two twisted insulated single wires 13; the first insulated single wire group 31 is composed of two insulated single wires 13, and the second insulated single wire group 32 is composed of three insulated single wires 13.

[0042] In a preferred embodiment, the insulated single wire 13 includes a tinned copper wire conductor 131, and a layer of polytetrafluoroethylene propylene insulation layer 132 is extruded from the tinned copper wire conductor 131. The conductor is made of tinned round copper wire, which has high conductivity, can reduce interference, and ensure the signal transmission of the cable. In addition, the polytetrafluoroethylene propylene insulation layer 132 has excellent dielectric strength, good electrical insulation, and high temperature resistance, and the maximum operating temperature of the conductor can reach 200°C.

[0043] In a preferred embodiment, the wrapping layer 4 is made of polyimide film; polyimide film is currently a high-performance film material with high and low temperature resistance, electrical insulation, and short-term temperature resistance up to 400°C.

[0044] The electromagnetic shielding layer 5 is woven from high-permeability alloy wire to form a high-permeability alloy wire shielding layer; the inner shielding layer 6 is woven from tin-plated copper-clad steel wire to form a tin-plated copper-clad steel wire shielding layer; and the outer shielding layer 10 is woven from tin-plated copper single wire to form a tin-plated copper wire shielding layer.

[0045] Among them, the electromagnetic shielding layer 5 and the inner shielding layer 6 adopt a braided combination form, with different metal materials combined to form multiple shielding reflection interfaces, which can improve the shielding effectiveness of the cable. Alloy wire is used instead of alloy tape to increase flexibility and make it easy to bend during use. The high permeability alloy wire electromagnetic shielding layer has high magnetic permeability and plays a shielding role in the low frequency band. At the same time, compared with ordinary tinned copper wire, tinned copper-clad steel has the characteristics of low density and light weight, which can reduce the weight of the cable while ensuring performance.

[0046] In a preferred embodiment, the fireproof layer 7 is formed by wrapping calcined mica tape;

[0047] Both the first composite fireproof layer 9 and the second composite fireproof layer 11 include a layer of high-silica oxidized glass cloth and a layer of calcined mica tape, forming a composite wrapping layer of calcined mica tape and high-silica glass cloth. The high-silica glass cloth has excellent heat resistance, with a short-term temperature resistance of up to 1400 degrees Celsius. The calcined mica tape has excellent high-temperature resistance and flame resistance, with a short-term temperature resistance of up to 1000 degrees Celsius. The composite wrapping method ensures the flexibility of the cable while meeting the requirements of fireproofing and heat insulation.

[0048] In a preferred embodiment, the fireproof and heat-insulating layer 8 is made of ceramicized polyolefin plastic, forming a ceramicized polyolefin extrusion layer; this material has excellent mechanical and environmental properties and excellent heat insulation properties; under flame burning or high temperature conditions, it can generate a hard ceramic-like shell that does not melt or drip, can resist water spray and mechanical vibration, and has very good heat insulation and fireproofing effects.

[0049] In a preferred embodiment, the outer sheath 12 is a TPV elastomer sheath, which has good mechanical environmental performance, high and low temperature resistance, good flame retardancy, wear resistance and softness.

[0050] In summary, the cable of this application has good insulation performance and high voltage resistance. It can guarantee a working time of at least 1 minute under ignition conditions at 1800℃, and its resistance to nuclear electromagnetic pulses can reach 70dB. It has good transmission performance and resistance to nuclear electromagnetic pulses.

[0051] The cable of this application is not only resistant to nuclear electromagnetic interference, but can also transmit signals under ultra-high temperature ignition conditions. It has excellent transmission performance, low loss, and achieves high temperature resistance through the mutual assistance of different materials. It also adopts a braided alternating structure, which makes the cable have excellent nuclear electromagnetic interference resistance under strong interference conditions. It is also flexible, lightweight, and easy to use.

[0052] 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.

[0053] 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.

[0054] 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 multi-core data ignition cable resistant to nuclear electromagnetic pulses, characterized in that, It includes a first layer of cable core (1), a second layer of cable core (2) twisted around the first layer of cable core (1), and a third layer of cable core (3) twisted around the second layer of cable core (2); the third layer of cable core (3) is covered with a wrapping layer (4), and the wrapping layer (4) is wrapped with an electromagnetic shielding layer (5), an inner shielding layer (6), a fireproof layer (7), a fireproof and heat-insulating layer (8), a first composite fireproof layer (9), an outer shielding layer (10), a second composite fireproof layer (11), and an outer sheath (12) in sequence on the outer periphery.

2. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 1, characterized in that, The first layer of cable core (1) is formed by twisting together two data cables (110), two sets of first four-wire groups (120), one set of five-wire groups (130) and two sets of twisted-pair shielded wires (140); wherein, taking one set of the five-wire groups (130) as the center, starting from any one of the data cables (110) on the outer periphery of the five-wire groups (130), one set of first four-wire groups (120), one set of twisted-pair shielded wires (140), another set of data cables (110), another set of first four-wire groups (120) and another set of twisted-pair shielded wires (140) are arranged in a clockwise direction.

3. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 2, characterized in that, The second layer of cable core (2) is formed by twisting together a set of three-wire groups (21) and eleven sets of second-four-wire groups (22); wherein, starting from the three-wire group (21), eleven sets of second-four-wire groups (22) are arranged in a clockwise direction on the outer periphery of the first layer of cable core (1).

4. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 3, characterized in that, The third layer of cable core (3) is formed by twisting together four groups of first insulated single wires (31) and four groups of second insulated single wires (32); wherein the four groups of first insulated single wires (31) and four groups of second insulated single wires (32) are arranged at intervals on the outer side of the second layer of cable core (2).

5. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 4, characterized in that, The three-wire group (21) is formed by twisting three insulated single wires (13); the first four-wire group (120) and the second four-wire group (22) are both formed by twisting four insulated single wires (13); the five-wire group (130) is formed by twisting five insulated single wires (13); the twisted-pair shielded wire (140) includes two twisted insulated single wires (13), and the two twisted insulated single wires (13) are wrapped with a tinned copper wire shielding layer (14) on their circumferential outer side; the first insulated single wire group (31) is composed of two insulated single wires (13), and the second insulated single wire group (32) is composed of three insulated single wires (13).

6. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 5, characterized in that, The insulated single wire (13) includes a tinned copper wire conductor (131), and the tinned copper wire conductor (131) is wrapped with a polytetrafluoroethylene propylene insulation layer (132) on its circumferential outer side.

7. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 1, characterized in that, The wrapping layer (4) is made of polyimide film; the electromagnetic shielding layer (5) is woven from high magnetic permeability alloy wire; the inner shielding layer (6) is woven from tin-plated copper-clad steel wire; and the outer shielding layer (10) is woven from tin-plated copper single wire.

8. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 1, characterized in that, The fireproof layer (7) is formed by wrapping calcined mica tape; the first composite fireproof layer (9) and the second composite fireproof layer (11) both include a layer of high-silica oxidized glass cloth and a layer of calcined mica tape.

9. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 1, characterized in that, The fireproof and heat-insulating layer (8) is made of ceramicized polyolefin plastic.

10. The multi-core data ignition cable resistant to nuclear electromagnetic pulse according to claim 1, characterized in that, The outer sheath (12) is a TPV elastomer sheath.

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