CN210403252U

CN210403252U - Multifunctional non-combustible bus cable for high-speed railway locomotive

Info

Publication number: CN210403252U
Application number: CN201921621541.0U
Authority: CN
Inventors: 汤代兵
Original assignee: Hubei Yuhong Photoelectric Industry Co ltd
Current assignee: Hubei Yuhong Photoelectric Industry Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-04-24
Anticipated expiration: 2029-09-26

Abstract

The utility model relates to a multi-functional incombustible type bus cable for above high-speed railway locomotive, including compound cable core and around the package in compound cable core surface around the covering, it has first shielding layer to wind the covering surface around the package, first shielding layer surface cladding has the second shielding layer, second shielding layer surface has the fire-retardant layer of fourth around the package, the crowded package in fire-retardant layer surface of fourth separates the oxygen layer, separate oxygen layer surface around the fire-retardant layer of package third, the fire-retardant layer surface of third winds the fire-retardant layer of package second, the fire-retardant layer surface cladding of second has the armor, the armor surface winds the package has first fire-retardant layer, the surface cladding of first fire-retardant layer has the outer jacket. The utility model provides a multi-functional incombustible type bus cable for above high-speed railway locomotive adopts physics foaming fluoroplastics to insulate as signal transmission medium, and four layers of fire-retardant layers of cable overall structure design, two-layer shielding layer and two-layer flame retardant coating simultaneously for signal cable's security performance, electrical properties, transmission performance and do not have the equal accord with the requirement of steamed light cigarette fire behavior.

Description

Multifunctional non-combustible bus cable for high-speed railway locomotive

Technical Field

The utility model relates to the technical field of cables, especially, relate to a multi-functional incombustible type bus cable for above high-speed railway locomotive.

Background

With the rapid development of China railways in recent years, the business mileage of railways in China reaches 12 kilometers, the railways are in the top of the world, the whole economy of China faces down-stream pressure, and the increase of railway investment strength has a great positive effect on pulling the national economy to increase.

By increasing the railway construction strength, on one hand, the development of industries such as steel, cement, building materials and the like which are closely related to the railway construction can be directly driven, and employment is promoted; on the other hand, the continuous construction and development of railways, particularly the development of high-speed rails, also have positive significance on the economic development and the investment and investment of various regions along the route. It is known that the development of the Chinese railways is extremely uneven, the networks of the Chinese and western railways are very sparse, and the development of the western economy is restricted by the backward traffic, which is one of the important factors that cause the development gap with the east and the west areas to be continuously widened. Railway construction continuously pulls and stimulates the consumption potential of the middle and western regions with lower current overall level, and the circulation of production distribution and exchange links of the middle and western regions is enhanced, so that the employment and income of local residents are improved to some extent, the consumption is continuously increased, and the production of consumer goods is stimulated. The high-speed railway can be completely constructed in the future, the market potential of high-speed railway equipment is high, and particularly, the consumption of data cables connected for transmitting signals is larger.

With the continuous update of high-speed rail equipment technology, the requirements on signal cables are higher and higher, and the traditional cable insulation layer uses physical foamed polyethylene as a transmission medium body, so that the signal transmission attenuation of the cable insulation layer is easily increased along with the increase of temperature in a high-temperature environment, and meanwhile, the cable insulation layer does not have flame retardance; in addition, the traditional fireproof cable uses a metal inner sheath, a wrapped mica tape and a ceramic compound tape to achieve the fireproof effect, and the structure is complex in production process and high in production cost.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned not enough of prior art, the utility model provides a multi-functional incombustible type bus cable for above high-speed railway locomotive solves current transmission cable and extremely easily receives ambient temperature to influence, and fire behaviour is poor, and factor of safety is low and the complicated problem with high costs of production technology.

The utility model discloses a realize through following technical scheme:

a multifunctional non-combustible bus cable used on a high-speed railway locomotive comprises a composite cable core and a wrapping layer wrapped on the surface of the composite cable core, wherein a first shielding layer is wrapped on the surface of the wrapping layer, a second shielding layer is wrapped on the surface of the first shielding layer, a fourth flame-retardant layer is wrapped on the surface of the second shielding layer, an oxygen-isolating layer is extruded on the surface of the fourth flame-retardant layer, a third flame-retardant layer is wrapped on the surface of the oxygen-isolating layer, a second flame-retardant layer is wrapped on the surface of the third flame-retardant layer, an armor layer is wrapped on the surface of the second flame-retardant layer, a first flame-retardant layer is wrapped on the surface of the armor layer, and an outer protective layer is wrapped on;

the composite cable core comprises a first inner conductor and a second inner conductor which are respectively formed by stranding multi-strand tinned copper wires, a first insulating layer and a second insulating layer are respectively extruded outside the first inner conductor and the second inner conductor, the first insulating layer and the second insulating layer are physical foaming fluorinated ethylene propylene layers, and one layer of fluorinated ethylene propylene outer skin layers is further extruded outside the physical foaming fluorinated ethylene propylene layers.

Furthermore, four first inner conductors and four second inner conductors are arranged respectively, the first inner conductors and the second inner conductors are symmetrically arranged in the cable respectively, and the first inner conductors coated with the first insulating layers and the second inner conductors coated with the second insulating layers are mutually twisted to form the composite cable core.

Furthermore, the first inner conductor is formed by twisting a plurality of strands of tinned copper wires, the first insulating layer is extruded and coated on the surface of the first inner conductor by using physical foaming fluorinated ethylene propylene, and a layer of fluorinated ethylene propylene outer skin layer is extruded and coated on the surface of the first insulating layer; the second inner conductor is formed by twisting a plurality of strands of tinned copper wires, the second insulating layer is wrapped on the surface of the second inner conductor in an extruding mode through physical foaming and is provided with a layer of fluorinated ethylene propylene outer skin layer in an extruding mode.

Furthermore, the wrapping layer is made of transparent polyester tapes.

Furthermore, the first shielding layer is wrapped on the surface of the wrapping layer in a wrapping mode of 360 degrees by adopting a single-sided conductive aluminum foil.

Furthermore, the second shielding layer is coated on the surface of the first shielding layer in a braided net mode for 360 degrees by using tinned copper wires.

Furthermore, the fourth flame-retardant layer, the third flame-retardant layer, the second flame-retardant layer and the first flame-retardant layer are all halogen-free low-smoke flame-retardant glass fiber tapes.

Further, the oxygen barrier layer comprises the following specific components in percentage by weight: 40-70 parts of inorganic adhesive, 22-50 parts of flame retardant, 23-35 parts of magnesium oxide, 19-53 parts of inorganic filler, 8-15 parts of mica powder, 10.8-15.8 parts of silicon dioxide powder and 8-10 parts of calcium carbonate.

Furthermore, the armor layer is formed by overlapping double-layer galvanized steel strips in a gap mode to cover the surface of the second flame-retardant layer by 360 degrees.

Further, the outer protective layer is made of ceramic polyolefin.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a multi-functional incombustible type bus cable for above high-speed railway locomotive, adopt physics foaming fluoroplastics insulation as signal transmission medium, use physics foaming three-layer coextrusion formula above the core structure, fill nitrogen synchronizer through high pressure physics and accomplish insulating sinle silk and extrude, cable overall structure designs four layers flame retardant coating simultaneously, two-layer shielding layer and two-layer flame retardant coating, make signal cable's security performance, electric property, transmission performance and do not have the equal accord with the requirement of steamed light cigarette flame retardant property, and simple process is with low costs moreover.

Drawings

Fig. 1 is a schematic structural diagram of a multifunctional non-combustible bus cable for use on a high-speed railway locomotive according to an embodiment of the present invention.

In the figure:

1. a first inner conductor; 2. a first insulating layer; 3. a second inner conductor; 4. a second insulating layer; 5. wrapping a covering; 6. a first shielding layer; 7. a second shielding layer; 8. a fourth flame retardant layer; 9. an oxygen barrier layer; 10. a third flame retardant layer; 11. a second flame retardant layer; 12. an armor layer; 13. a first flame retardant layer; 14. an outer jacket.

Detailed Description

The following examples are presented to illustrate certain embodiments of the invention and should not be construed as limiting the scope of the invention. The present disclosure may be modified from materials, methods, and reaction conditions at the same time, and all such modifications are intended to be within the spirit and scope of the present disclosure.

As shown in fig. 1, the multifunctional non-combustible bus cable for the high-speed railway locomotive comprises a composite cable core and a wrapping layer 5 wrapped on the surface of the composite cable core, wherein a first shielding layer 6 is wrapped on the surface of the wrapping layer 5, a second shielding layer 7 is wrapped on the surface of the first shielding layer 6, a fourth flame-retardant layer 8 is wrapped on the surface of the second shielding layer 7, an oxygen-isolating layer 9 is extruded on the surface of the fourth flame-retardant layer 8, a third flame-retardant layer 10 is wrapped on the surface of the oxygen-isolating layer 9, a second flame-retardant layer 11 is wrapped on the surface of the third flame-retardant layer 10, an armor layer 12 is wrapped on the surface of the second flame-retardant layer 11, a first flame-retardant layer 13 is wrapped on the surface of the armor layer 12, and an outer protective layer 14 is wrapped on the surface of the first flame-;

the composite cable core comprises a first inner conductor 1 and a second inner conductor 3 which are respectively formed by stranding a plurality of strands of tinned copper wires, the resistance is small, the first inner conductor 1 and the second inner conductor 3 are respectively wrapped with a first insulating layer 2 and a second insulating layer 4 in an extruding mode, the first insulating layer 2 and the second insulating layer 4 are physical foaming fluorinated ethylene propylene layers, the average dielectric constant of a wire core is reduced by the structure, the low attenuation requirement of signal transmission is met, the transmission rate of the wire core is improved, the outer diameter size of the wire core is reduced under the condition of reaching the same transmission performance, insulating materials are greatly saved, the production cost is reduced, the traditional high-speed train data cable is insulated by adopting physical foaming polyethylene, the foaming degree is about 50%, the transmission rate is 81%, the saving materials are 66%, the foaming of the fluorinated ethylene propylene layer insulating layer adopted by the cable core reaches more than 70%, and the transmission rate is about 88%, the material is saved by 81 percent, the maximum attenuation value is less than 20dB/km when the frequency is 3MHz, the working capacitance of 2MHz is less than or equal to 4.6pF/M, the dielectric strength AC and 15KV are not broken down in 5min, and the insulation resistance is more than or equal to 5000 MOmega.km; the physical foaming fluorinated ethylene propylene layer is also extruded with a fluorinated ethylene propylene layer, so that the line pair structure is more stable, and the characteristic impedance meets 120 +/-10 omega at 3 MHz.

In this embodiment, four first inner conductors 1 and four second inner conductors 3 are respectively arranged, each of the first inner conductors 1 and the second inner conductors 3 is symmetrically arranged in the cable, and the first inner conductor 1 coated with the first insulating layer 2 and the second inner conductor 3 coated with the second insulating layer 4 are twisted with each other to form the composite cable core.

In this embodiment, the wrapping layer 5 is made of a transparent polyester tape, and the material has good high-temperature resistance and heat insulation.

In this embodiment, the first shielding layer 6 is a single-sided conductive aluminum foil wrapped on the surface of the wrapping layer 5 in a wrapping manner of 360 degrees, and the conductive surface faces outward, thereby achieving anti-electromagnetic interference.

In this embodiment, the second shielding layer 7 is coated on the surface of the first shielding layer 6 in a braided mesh form 360 degrees by using a tinned copper wire, and the density of the second shielding layer is greater than 80%, so that the electromagnetic compatibility effect is achieved.

In this embodiment, the fourth flame retardant layer 8 uses a halogen-free low-smoke flame retardant glass fiber tape to wrap around the surface of the second shielding layer 7, the third flame retardant layer 10 uses a halogen-free low-smoke flame retardant glass fiber tape to wrap around the surface of the oxygen-isolating layer 9, the second flame retardant layer 11 uses a halogen-free low-smoke flame retardant glass fiber tape to wrap around the surface of the third flame retardant layer 10, the first flame retardant layer 13 uses a halogen-free low-smoke flame retardant glass fiber tape to wrap around the surface of the armor layer 12, the halogen-free low-smoke flame retardant glass fiber tape has good flame retardancy and environmental protection, the oxygen index of the halogen-free low-smoke flame retardant glass fiber tape is greater than 55, and the halogen-free low-smoke flame retardant glass fiber.

In this embodiment, the oxygen barrier layer 9 comprises the following specific components: 40-70 parts of inorganic adhesive, 22-50 parts of flame retardant, 23-35 parts of magnesium oxide, 19-53 parts of inorganic filler, 8-15 parts of mica powder, 10.8-15.8 parts of silicon dioxide powder and 8-10 parts of calcium carbonate, wherein the material is formed by extrusion coating to form an oxygen insulation layer structure in the cable, and has high flame retardant effect; traditional railway digital signal cable fireproof cable uses mica tape etc. to wind package thing and metal class armor isotructure above the design, and the process is complicated in the production process, and this application product uses novel fire prevention oxygen barrier layer material, once only accomplishes through double-deck crowded formula hot extrusion molding method altogether, accomplishes original three process by a process, has reduced cable manufacturing cost.

In this embodiment, the armor layer 12 uses double-layer galvanized steel strips to overlap with gaps to form 360 degrees to cover the surface of the second flame retardant layer, so as to protect the internal structure of the cable.

In this embodiment, the outer protective layer 14 is made of ceramic polyolefin, the material does not absorb water or moisture, the dielectric strength is greater than or equal to 22KV/mm at normal temperature, the volume resistivity is greater than or equal to 2 × 1014 Ω · cm, uniform micropores are generated on the section of the hard armor after ablation, the dielectric strength of the hard armor after ceramic is greater than 24KV/mm, the volume resistivity is greater than 2 × 1015 Ω · cm, the oxygen index can reach more than 45 at most, and the material is flame-retardant, low-smoke, halogen-free, harmless, non-flame-retardant, non-dripping, non-dropping, and can also form a very hard ceramic armor shell after ablation, thereby protecting the internal structure of the cable.

In conclusion, the cable adopts physical foaming fluoroplastic insulation as a signal transmission medium, a physical foaming three-layer co-extrusion mode is adopted on a cable core structure, the extrusion of an insulated cable core is completed through high-pressure physical nitrogen-filling synchronous equipment, and meanwhile, the overall structure of the cable is provided with four flame-retardant layers, two shielding layers and two fireproof layers, so that the safety performance, the electrical performance, the transmission performance and the halogen-free light smoke flame-retardant performance of the signal cable meet the requirements, and the cable is simple in process and low in cost.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A multifunctional non-combustible bus cable used on a high-speed railway locomotive is characterized by comprising a composite cable core and a wrapping layer (5) wrapped on the surface of the composite cable core, a first shielding layer (6) is wound on the surface of the winding layer (5), a second shielding layer (7) is coated on the surface of the first shielding layer (6), a fourth flame-retardant layer (8) is wrapped on the surface of the second shielding layer (7), an oxygen-isolating layer (9) is extruded on the surface of the fourth flame-retardant layer (8), a third flame-retardant layer (10) is wrapped on the surface of the oxygen-isolating layer (9), a second flame-retardant layer (11) is wrapped on the surface of the third flame-retardant layer (10), the surface of the second flame-retardant layer (11) is coated with an armor layer (12), the surface of the armor layer (12) is wrapped with a first flame-retardant layer (13), and the surface of the first flame-retardant layer (13) is coated with an outer protective layer (14);

the composite cable core comprises a first inner conductor (1) and a second inner conductor (3) which are respectively formed by stranding multi-strand tinned copper wires, the first inner conductor (1) and the second inner conductor (3) are respectively wrapped by a first insulating layer (2) and a second insulating layer (4) in an extruding mode, the first insulating layer (2) and the second insulating layer (4) are physical foaming fluorinated ethylene propylene layers, and the physical foaming fluorinated ethylene propylene layers are further wrapped by a layer of fluorinated ethylene propylene skin layers in an extruding mode.

2. The multifunctional non-combustible bus cable for the locomotive at high speed according to claim 1, wherein the number of the first inner conductor (1) and the number of the second inner conductor (3) are four, the first inner conductor (1) and the second inner conductor (3) are symmetrically arranged in the cable, and the first inner conductor (1) coated with the first insulating layer (2) and the second inner conductor (3) coated with the second insulating layer (4) are twisted with each other to form the composite cable core.

3. The multifunctional non-combustible bus cable for the high-speed railway locomotive is characterized in that the wrapping layer (5) is made of transparent polyester tape.

4. The multifunctional non-combustible bus cable used on the high-speed railway locomotive is characterized in that the first shielding layer (6) is made of single-sided conductive aluminum foil and is coated on the surface of the wrapping layer (5) in a wrapping mode for 360 degrees.

5. The multifunctional non-combustible bus cable for the high-speed railway locomotive is characterized in that the second shielding layer (7) is coated on the surface of the first shielding layer (6) in a woven mesh mode by 360 degrees by using tinned copper wires.

6. The multifunctional non-combustible bus cable used on the high-speed railway locomotive is characterized in that the fourth flame-retardant layer (8), the third flame-retardant layer (10), the second flame-retardant layer (11) and the first flame-retardant layer (13) are all made of halogen-free low-smoke flame-retardant glass fiber tapes.

7. The multifunctional non-combustible bus cable for the locomotive above the high-speed railway as claimed in claim 1, wherein the oxygen barrier layer (9) is prepared by mixing 40-70 parts of inorganic adhesive, 22-50 parts of flame retardant, 23-35 parts of magnesium oxide, 19-53 parts of inorganic filler, 8-15 parts of mica powder, 10.8-15.8 parts of silica powder and 8-10 parts of calcium carbonate.

8. The multifunctional non-combustible bus cable used on the high-speed railway locomotive is characterized in that the armor layer (12) is formed by overlapping double galvanized steel strips at intervals to cover the surface of the second flame-retardant layer for 360 degrees.

9. The multifunctional non-combustible bus cable for high-speed railway locomotives according to claim 1, wherein the outer sheath (14) is made of ceramic polyolefin.