CN112967842A

CN112967842A - Integrated cable for signal and digital network transmission

Info

Publication number: CN112967842A
Application number: CN202110403152.6A
Authority: CN
Inventors: 吴庆元; 贾金艳; 毛景杭; 杨蕊; 孔祥翠; 王春红; 翟广
Original assignee: Luneng Taishan Qufu Electric Cable Ltd
Current assignee: Luneng Taishan Qufu Electric Cable Ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-06-15

Abstract

The utility model provides a signal and digital network transmission are with composite cable, divides shielding, fire-retardant isolation layer, non-metallic glass fiber reinforced plastic pole, the total shield layer of copper strips, fire-retardant interior sheath, two steel band armoring, the low fire-retardant elastomer oversheath of steamed cigarette of nothing, its characterized in that including copper conductor, polyolefin insulation, band, copper wire: two insulated wire cores are twisted into a group to form a pair of twisted wire pairs, one pair of twisted wire pairs and 4 pairs of twisted wires are respectively and longitudinally wrapped with wrapping tapes and braided copper wires for shielding respectively to form a signal control pair-twisted basic unit group and a digital network 4 pair basic unit group; the cable core is wrapped with a copper strip total shield, the copper strip total shield is extruded with a flame-retardant inner sheath, the flame-retardant inner sheath is wrapped with a double-steel-strip armor, and the outermost layer is extruded with a halogen-free low-smoke flame-retardant elastomer outer sheath. The beneficial effects of the invention are: the comprehensive cable for signal and digital network transmission has integrated signal control and digital network transmission and has electromagnetic radiation preventing, tensile, bending, cracking and side pressure resisting performance.

Description

Integrated cable for signal and digital network transmission

Technical Field

The invention relates to a comprehensive cable for signal and network, in particular to a comprehensive cable for signal and digital network transmission.

Background

At present, with the continuous promotion of power generation companies such as power plants, wind power plants and the like to the safe and efficient intelligent production of signal control and digital network transmission, higher intelligent and environmental protection requirements are put forward on various cables used by the power generation companies, particularly, the computer and instrument signal control and information network transmission cables must ensure the safety, accuracy and convenience of data transmission of the cables, so as to ensure the efficient operation of the digital transmission and automatic control systems of the power generation companies such as the whole power plants, wind power plants and the like, and meet the environmental protection requirements. The current low-smoke halogen-free flame-retardant cable also has the defects of being hard and not resistant to environmental cracking.

Disclosure of Invention

The invention aims to overcome the defects that the existing low-smoke halogen-free signal transmission cable is not resistant to environmental cracking and single in signal transmission, and provides a safe environment-friendly flame-retardant comprehensive cable integrating tensile resistance, lateral pressure resistance, bending resistance, cracking resistance and electromagnetic interference resistance and integrating signal control and digital network transmission.

The invention is realized by the following modes: the utility model provides a signal and digital network transmission are with composite cable, divides shielding, fire-retardant isolation layer, non-metallic glass fiber reinforced plastic pole, the total shield layer of copper strips, fire-retardant interior sheath, two steel band armoring, the low fire-retardant elastomer oversheath of steamed cigarette of nothing, its characterized in that including copper conductor, polyolefin insulation, band, copper wire: and extruding polyolefin outside the annealed copper conductor to form an insulated wire core in an insulated mode, twisting two insulated wire cores into a group to form a pair of twisted wires, longitudinally wrapping a wrapping tape and weaving copper wires for shielding respectively for one pair of twisted wires and 4 pairs of twisted wires, extruding the flame-retardant isolation layer outside the copper wires for shielding respectively, and thus forming a signal control pair-twisted basic unit group and a digital network 4 pair basic unit group. The signal control pair-twisting basic unit group and the digital network 4 pair basic unit group are cabled together with the nonmetal glass fiber reinforced plastic rod to form a cable core, the cable core is wrapped with the flame-retardant wrapping tape and the copper strip total shielding, the copper strip total shielding extrudes the flame-retardant inner protective layer, the flame-retardant inner protective layer is wrapped with the double steel belt armoring, and the outermost layer is extruded with the halogen-free low-smoke flame-retardant elastomer outer sheath.

The invention has the beneficial effects that: a signal and digital network transmission composite cable integrates signal control and digital network transmission, avoids secondary wiring and can effectively save the cost of construction, network construction and the like. Due to the adoption of the double-shielding structure, the requirement of electromagnetic radiation interference resistance among various cables is supported, so that the cable can be laid with various low-voltage cables on the same line, the line space can be saved, and the special requirement of multi-scene laying can be met. The nonmetal reinforcing part provides tensile and bending resistance, and the double-steel-tape armor provides lateral pressure resistance of the cable. A halogen-free low-smoke flame-retardant elastomer outer sheath provides a cracking-resistant, safe and environment-friendly flame-retardant comprehensive cable.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view of the present invention.

In the figure, 1, a copper conductor, 2, a polyolefin insulation, 3, a signal control twisted pair basic unit group, 4, a wrapping tape, 5, a copper wire partial shield, 6, a flame-retardant isolation layer, 7, a flame-retardant wrapping tape, 8, a copper strip total shield, 9, a flame-retardant inner protection layer, 10, a double steel strip armor, 11, a halogen-free low-smoke flame-retardant elastomer outer sheath, 12, a copper conductor, 13, a polyolefin insulation, 14, a twisted pair, 15, a digital network 4, a wrapping tape, 17, a copper wire partial shield, 18, a flame-retardant isolation layer and 19, a nonmetal glass fiber reinforced plastic rod.

Detailed Description

Fig. 1 shows a schematic structural diagram of the product, which includes a copper conductor 1, a polyolefin insulation 2, a signal control twisted pair basic unit group 3, a belting 4, a copper wire partial shielding 5, a flame-retardant isolation layer 6, a flame-retardant belting 7, a copper strip total shielding 8, a flame-retardant inner protection layer 9, a double-steel-tape armoring 10, a halogen-free low-smoke flame-retardant elastomer outer sheath 11, a copper conductor 12, a polyolefin insulation 13, a twisted pair 14, a digital network 4 pair basic unit group 15, a belting 16, a copper wire partial shielding 17, a flame-retardant isolation layer 18, and a non-metal glass fiber reinforced plastic rod 19.

During manufacturing, the copper rod is drawn into qualified annealed

copper conductors

1 and 12 for multiple times through a wire drawing machine, and

polyolefin insulators

2 and 13 are extruded on the conductors, so that an insulated wire core is manufactured; two insulated wire cores are twisted to form a twisted pair, one twisted pair is longitudinally wrapped with a wrapping tape 4, a copper wire is braided to form a shielding layer 5, and then a flame-retardant isolation layer 6 is extruded, so that a complete signal control twisted pair basic unit group 3 is formed; 4 twisted pairs 14 are twisted, then a wrapping tape 16 is longitudinally wrapped, a copper wire partial shield 17 is woven, and then a flame-retardant isolation layer 18 is extruded, so that the complete digital network 4 is manufactured for the basic unit group 15. According to the requirement, a plurality of signal control pair-twisting basic unit groups 3, a plurality of digital networks 4 perform cabling and twisting on a basic unit group 15 and a plurality of nonmetal glass fiber reinforced plastic rods 19 to form a cable core, the cable core is wrapped with a flame-retardant wrapping tape 7, the flame-retardant wrapping tape is wrapped with a copper strip total shield 8, the copper strip total shield is wrapped with a flame-retardant inner sheath 9 in an extruding mode, the flame-retardant inner sheath is wrapped with a double steel strip armor 10, the double steel strip armor is wrapped with a halogen-free low-smoke flame-retardant elastomer outer sheath 11 in an extruding mode, identification marks are printed on the surface of the outer sheath in a spraying mode.

The halogen-free low-smoke flame-retardant elastomer outer sheath 11 is a mixed material, and comprises the following components in parts by mass: 15-20 parts of ethylene-vinyl acetate copolymer, 10-15 parts of polyester elastomer, 5-10 parts of chlorinated polyethylene, 5-8 parts of hydrogenated base oil, 2-5 parts of maleic anhydride grafted polyolefin elastomer, 42-47 parts of halogen-free flame retardant, 8-12 parts of flame retardant, 0.5-1 part of alkyl siloxane, 1.5-3.5 parts of antioxidant and 4-6 parts of smoke suppressant, wherein the sum of the parts by mass of the components is 100 parts.

The ethylene-vinyl acetate copolymer has the vinyl acetate content of 35-40 g/cm3 and the melt index of 2-4 g/10 min.

The polyester elastomer is thermoplastic elastomer TPEE.

The chlorinated polyethylene is a thermoplastic elastomer CM.

The grafting rate of the maleic anhydride grafted polyolefin elastomer is 1%, and the melt index is 0.8-1.2 g/10 min.

The density of the hydrogenated base oil is 0.87g/cm3, and the kinematic viscosity number at 40 DEG is 30-35 mm²/s。

The halogen-free flame retardant is a mixture of aluminum hydroxide and magnesium hydroxide, and comprises the following components in parts by mass: 1, mixing and compounding, wherein the average particle size is 1-4 mu m.

The flame retardant is melamine urate and p-diethyl aluminum hypophosphite, wherein the mass fraction of the flame retardant is 1: 2, mixing and compounding, wherein the melamine urate is a nitrogen-containing environment-friendly halogen-free flame retardant, the powder diameter is 40-50 mu m, the aluminum diethylphosphinate is an environment-friendly halogen-free flame retardant with high phosphorus content, and the powder diameter is 2-4 mu m.

The smoke suppressant is zinc molybdate powder, and the particle size of the smoke suppressant is 1-3 mu m.

The alkyl siloxane is vinyl siloxane, and the effective content of the vinyl siloxane is more than or equal to 99 percent.

The antioxidant is formed by mixing pentaerythritol ester and dioctadecyl thiodipropionate according to the mass ratio of 1: 3.

Example 1

Step 1, weighing raw materials of the components, wherein the raw materials comprise, by mass, 20 parts of an ethylene-vinyl acetate copolymer, 12 parts of a polyester elastomer, 5 parts of chlorinated polyethylene, 5 parts of hydrogenated base oil, 2 parts of a maleic anhydride grafted polyolefin elastomer, 42 parts of a halogen-free flame retardant, 8 parts of a flame retardant, 0.5 part of alkyl siloxane, 1.5 parts of an antioxidant and 4 parts of a smoke suppressant, and the sum of the parts by mass of the components is 100 parts.

And 2, mixing, namely putting the raw materials of the components weighed in the step 1 into an internal mixer, and mixing at the temperature of 150-165 ℃ to uniformly mix the components into a colloid.

And 3, granulating, namely extruding and granulating the product mixed in the step 2, wherein the temperature of each area of a double-screw extruder is 102-145 ℃, and thus obtaining the finished halogen-free low-smoke flame-retardant elastomer outer sheath.

The sheath is granular, and the size of the granules is adjusted to be 3 x 3mm through the extrusion speed and the granulating speed.

Example 2

Step 1, weighing raw materials of the components, wherein the raw materials comprise, by mass, 15 parts of an ethylene-vinyl acetate copolymer, 15 parts of a polyester elastomer, 4 parts of chlorinated polyethylene, 5 parts of hydrogenated base oil, 2 parts of a maleic anhydride grafted polyolefin elastomer, 45 parts of a halogen-free flame retardant, 8 parts of a flame retardant, 0.5 part of alkyl siloxane, 1.5 parts of an antioxidant and 4 parts of a smoke suppressant, and the sum of the parts by mass of the components is 100 parts. The rest of the procedure was the same as in example 1.

The test results of main items of the halogen-free low-smoke flame-retardant elastomer outer sheath are shown in table 1, and it can be seen from the table that the test results of the outer sheath in the scheme of the invention are very excellent, so that the environment-friendly requirements of low smoke, halogen-free, flame-retardant and environmental cracking resistance of the product are met, the halogen-free low-smoke flame-retardant elastomer outer sheath is superior to similar products sold in the market at present, and the problems that the existing low-smoke halogen-free cable is hard and does not resist environmental cracking in the prior art are solved.

Claims

1. The utility model provides a signal and digital network transmission are with composite cable, divides shielding, fire-retardant isolation layer, non-metallic glass fiber reinforced plastic pole, the total shield layer of copper strips, fire-retardant interior sheath, two steel band armoring, the low fire-retardant elastomer oversheath of steamed cigarette of nothing, its characterized in that including copper conductor, polyolefin insulation, band, copper wire: extruding polyolefin outside an annealed copper conductor to be insulated to form an insulated wire core, twisting two insulated wire cores into a group to form a pair of twisted wires, longitudinally wrapping a wrapping tape and weaving a copper wire to respectively shield one pair of twisted wires and 4 pairs of twisted wires, and extruding a flame-retardant isolation layer outside the copper wire shield to form a signal control pair-twisted basic unit group and a digital network 4 pair basic unit group; the signal control pair-twisting basic unit group and the digital network 4 pair basic unit group are cabled together with the nonmetal glass fiber reinforced plastic rod to form a cable core, the cable core is wrapped with the flame-retardant wrapping tape and the copper strip total shielding, the copper strip total shielding extrudes the flame-retardant inner protective layer, the flame-retardant inner protective layer is wrapped with the double steel belt armoring, and the outermost layer is extruded with the halogen-free low-smoke flame-retardant elastomer outer sheath.

2. A composite cable for signal and digital network transmission as claimed in claim 1, wherein: the plurality of signal control pair-twisting basic unit groups and the plurality of digital networks 4 perform cabling and twisting on the basic unit groups and the plurality of non-metal glass fiber reinforced plastic rods to form cable cores.

3. A composite cable for signal and digital network transmission as claimed in claim 1, wherein: the halogen-free low-smoke flame-retardant elastomer outer sheath is a mixed material and comprises the following components in parts by mass: 15-20 parts of ethylene-vinyl acetate copolymer, 10-15 parts of polyester elastomer, 5-10 parts of chlorinated polyethylene, 5-8 parts of hydrogenated base oil, 2-5 parts of maleic anhydride grafted polyolefin elastomer, 42-47 parts of halogen-free flame retardant, 8-12 parts of flame retardant, 0.5-1 part of alkyl siloxane, 1.5-3.5 parts of antioxidant and 4-6 parts of smoke suppressant, wherein the sum of the parts by mass of the components is 100 parts.

4. A composite cable for signal and digital network transmission as claimed in claim 1, wherein: the halogen-free flame retardant is a mixture of aluminum hydroxide and magnesium hydroxide, and comprises the following components in parts by mass: 1, mixing and compounding, wherein the average particle size is 1-4 mu m.

5. A composite cable for signal and digital network transmission as claimed in claim 1, wherein: the flame retardant is melamine urate and p-diethyl aluminum hypophosphite, wherein the mass fraction of the flame retardant is 1: 2, mixing and compounding, wherein the melamine urate is a nitrogen-containing environment-friendly halogen-free flame retardant, the powder diameter is 40-50 mu m, the aluminum diethylphosphinate is an environment-friendly halogen-free flame retardant with high phosphorus content, and the powder diameter is 2-4 mu m.

6. A composite cable for signal and digital network transmission as claimed in claim 1, wherein: the antioxidant is formed by mixing pentaerythritol ester and dioctadecyl thiodipropionate according to the mass ratio of 1: 3.