An inorganic mineral insulated high temperature resistant instrument communication cable

Abstract

The present invention discloses an inorganic mineral insulated, high-temperature resistant instrument communication cable, belonging to the field of cable technology. The cable comprises at least two cores, each core comprising two conductors, each coated with an inorganic mineral insulation layer. The two conductors coated with the inorganic mineral insulation layer are twisted together and then sequentially coated with an inner thermal insulation and cooling wrapping layer and a copper tape shielding layer from the inside out to form a cable core. The outer thermal insulation and cooling wrapping layer, a copper tape shielding layer, and a corrugated copper sheath are sequentially coated from the inside out to form a cable core. The present invention utilizes an inorganic mineral insulation layer and a corrugated copper sheath, both of which are non-flammable and non-combustible, and can continue to operate even in proximity to flames. Furthermore, the present invention utilizes inner and outer thermal insulation wrapping layers in addition to these two materials. Therefore, under the protection of multiple fire-resistant and heat-insulating materials, the present invention can withstand continuous operating temperatures of up to 300°C.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to an inorganic mineral insulated high-temperature resistant instrument communication cable. Background Art

[0002] Cables are typically made of several or several groups of conductors (at least two per group), twisted together. Each group of conductors is insulated from each other and often twisted around a core, covered in a highly insulating covering. Cables used in instrumentation have particularly high performance requirements, requiring not only the safety, reliability, wear resistance, and flame retardancy of traditional cables, but also stable heat and high-temperature resistance. However, due to the limitations of commercially available insulation materials, the resulting cables have limited extreme temperature resistance. Under extreme conditions, such as ambient temperatures exceeding 200°C, they are susceptible to damage and aging, and even unstable and easily interrupted transmission signals. Summary of the Invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes an inorganic mineral insulated high-temperature resistant instrument communication cable.

[0004] The technical solution adopted in the present invention is:

[0005] An inorganic mineral insulated high-temperature resistant instrument communication cable is characterized in that it includes at least two cores, each core includes two conductors, the conductors are coated with an inorganic mineral insulation layer, and the two conductors coated with the inorganic mineral insulation layer are twisted together and coated with an inner insulation and cooling layer and a copper tape shielding layer from the inside to the outside to form a cable core. The cable core is coated with an outer insulation and cooling layer, a copper tape shielding layer and a corrugated copper sheath from the inside to the outside.

[0006] Furthermore, the heat-insulating and cooling inner wrapping layer is formed by wrapping a mixture of ceramic silicone tape and glass fiber tape.

[0007] Furthermore, the heat-insulating and cooling outer wrapping layer is formed by wrapping with synthetic mica tape.

[0008] The ceramic silicone tape in the heat-insulating and cooling inner wrapping layer (3) is composed of the following raw materials in parts by weight:

[0009] Silicone rubber 130-140, bis(2,4-dichlorobenzoyl) peroxide 2-3, expanded perlite 17-20, ricinoleic acid 1-2, ethylene bisstearamide 3-5, sp-80 2-3, antioxidant RD 2-3, aminopropyl triethoxysilane 4-6, phthalate 6-10, styrene 30-40, diisopropyl peroxide 1-1.3.

[0010] The method for preparing the ceramicized silicone tape in the heat-insulating and cooling inner wrapping layer (3) comprises the following steps:

[0011] Take dicumyl peroxide, add it to 20-30 times its weight of isopropyl alcohol, stir evenly, and obtain the initiator;

[0012] Take phthalate and styrene, mix them, add them to isopropyl alcohol (10-20 times the weight of the mixture), stir evenly, send them into a reactor, introduce nitrogen, adjust the reactor temperature to 130-140°C, add ricinoleic acid and initiator, stir and react for 4-6 hours, cool the discharged material to obtain a polymer emulsion;

[0013] Take expanded perlite, calcine it at 700-800℃ for 1-2 hours, grind it into fine powder after cooling, mix it with ethylene bisstearamide, add it to deionized water 30-40 times the weight of the mixture, ultrasonicate it for 10-20 minutes, blend it with the above polymer emulsion, add SP-80, continue ultrasonic dispersion for 10-20 minutes, increase the temperature to 70-75℃, keep stirring for 2-3 hours, filter it with suction, wash the filter cake with water, dry it in vacuum at 110-120℃ for 1-2 hours, and cool it to room temperature to obtain a composite filler;

[0014] Take aminopropyl triethoxysilane, add it to 30-40 times of its weight in anhydrous ethanol, stir evenly, add 10-15% of the weight of silicone rubber, stir evenly, remove the ethanol by rotary evaporation, and dry at room temperature to obtain a premixed rubber material;

[0015] Take the above premixed rubber material, blend it with the composite filler, send it into the internal mixer, mix it at 100-105℃ for 10-15 minutes, add the remaining silicone rubber and antioxidant RD after cooling, and turn it over on the machine. After the rubber material is rolled, add bis(2,4-dichlorobenzoyl)peroxide to the rubber material, and finally make triangle bags 5 times each. After unrolling, the product is obtained.

[0016] The advantages of the present invention are:

[0017] The present invention utilizes an inorganic mineral insulation layer and a corrugated copper sheath, both of which are non-combustible and non-combustible, allowing continued operation even in the presence of flames. Furthermore, based on these two materials, the present invention incorporates inner and outer insulation layers. The inner insulation layer is constructed from a mixture of ceramic silicone tape and fiberglass tape, while the outer insulation layer is constructed from synthetic mica tape. Consequently, under the protection of multiple refractory and thermal insulation materials, the present invention can withstand continuous operating temperatures up to 300°C. The inner insulation layer, comprised of ceramic silicone tape, exhibits excellent fireproofing, flame retardancy, and low smoke properties. The present invention effectively enhances thermal insulation performance by incorporating expanded perlite. Polystyrene, a low-thermal-conductivity material with weak thermal conductivity, is used as an organic filler, effectively synergizing with the inorganic perlite to achieve thermal insulation and improve the mechanical strength of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] In the figure: conductor 1, inorganic mineral insulation layer 2, thermal insulation and cooling inner wrapping layer 3, copper tape sub-shielding layer 4, thermal insulation and cooling outer wrapping layer 5, copper tape overall shielding layer 6, corrugated copper sheath 7. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, an inorganic mineral insulated high-temperature resistant instrument communication cable includes at least two cores, each core includes two conductors 1, the conductor 1 is coated with an inorganic mineral insulation layer 2, and the two conductors 1 coated with the inorganic mineral insulation layer 2 are twisted into a pair and sequentially coated with a thermal insulation and cooling inner wrapping layer 3 and a copper tape sub-shielding layer 4 from the inside to the outside to form a cable core. The cable core is sequentially coated with a thermal insulation and cooling outer wrapping layer 5, a copper tape general shielding layer 6, and a corrugated copper sheath 7 from the inside to the outside.

[0023] The heat-insulating and cooling inner wrapping layer 3 is formed by wrapping a mixture of ceramic silicone tape and glass fiber tape.

[0024] The heat-insulating and cooling outer wrapping layer 5 is formed by wrapping with synthetic mica tape.

[0025] The ceramic silicone tape in the heat-insulating and cooling inner wrapping layer 3 is composed of the following raw materials in parts by weight:

[0026] Silicone rubber 130, bis(2,4-dichlorobenzoyl) peroxide 2, expanded perlite 17, ricinoleic acid 1, ethylene bisstearamide 3, sp-80 2, antioxidant RD 2, aminopropyltriethoxysilane 4, phthalate 6, styrene 30, diisopropyl peroxide 1.

[0027] The method for preparing the ceramic silicone tape in the heat-insulating and cooling inner wrapping layer 3 comprises the following steps:

[0028] (1) Take dicumyl peroxide, add it to 20 times its weight of isopropyl alcohol, and stir evenly to obtain an initiator;

[0029] (2) phthalate ester and styrene were mixed and added to isopropyl alcohol (10 times the weight of the mixture), stirred evenly, and sent to a reactor. Nitrogen was introduced and the reactor temperature was adjusted to 130°C. Ricinoleic acid and initiator were added and stirred for 4 hours. The discharged material was cooled to obtain a polymer emulsion;

[0030] (3) Take expanded perlite, calcine it at 700°C for 1 hour, grind it into fine powder after cooling, mix it with ethylene bisstearamide, add it into deionized water 30 times the weight of the mixture, ultrasonicate it for 10 minutes, blend it with the above polymer emulsion, add SP-80, continue ultrasonic dispersion for 10 minutes, raise the temperature to 70°C, keep stirring for 2 hours, filter it with suction, wash the filter cake with water, dry it in vacuum at 110°C for 1 hour, and cool it to room temperature to obtain a composite filler;

[0031] (4) Take aminopropyl triethoxysilane, add it to 30 times its weight of anhydrous ethanol, stir evenly, add 10% of the weight of silicone rubber, stir evenly, remove the ethanol by rotary evaporation, and dry at room temperature to obtain a premixed rubber;

[0032] (5) Take the above premixed rubber material, blend it with the composite filler, send it into the internal mixer, mix it at 100℃ for 10 minutes, add the remaining silicone rubber and antioxidant RD after cooling, and turn it over on the machine. After the rubber material is rolled, add bis(2,4-dichlorobenzoyl) peroxide to the rubber material, and finally make triangle bags 5 times each. After the sheet is put down, it is obtained.

[0033] Example 2

[0034] like Figure 1 As shown, an inorganic mineral insulated high-temperature resistant instrument communication cable includes at least two cores, each core includes two conductors 1, the conductor 1 is coated with an inorganic mineral insulation layer 2, and the two conductors 1 coated with the inorganic mineral insulation layer 2 are twisted into a pair and sequentially coated with a thermal insulation and cooling inner wrapping layer 3 and a copper tape sub-shielding layer 4 from the inside to the outside to form a cable core. The cable core is sequentially coated with a thermal insulation and cooling outer wrapping layer 5, a copper tape general shielding layer 6, and a corrugated copper sheath 7 from the inside to the outside.

[0035] The heat-insulating and cooling inner wrapping layer 3 is formed by wrapping a mixture of ceramic silicone tape and glass fiber tape.

[0036] The heat-insulating and cooling outer wrapping layer 5 is formed by wrapping with synthetic mica tape.

[0037] The ceramic silicone tape in the heat-insulating and cooling inner wrapping layer 3 is composed of the following raw materials in parts by weight:

[0038] Silicone rubber 140, bis(2,4-dichlorobenzoyl) peroxide 3, expanded perlite 20, ricinoleic acid 2, ethylene bisstearamide 5, sp-80 3, antioxidant RD 3, aminopropyltriethoxysilane 6, phthalate 10, styrene 40, diisopropyl peroxide 1.3.

[0039] The method for preparing the ceramic silicone tape in the heat-insulating and cooling inner wrapping layer 3 comprises the following steps:

[0040] (1) Take dicumyl peroxide, add it to 30 times its weight of isopropyl alcohol, and stir evenly to obtain an initiator;

[0041] (2) phthalate and styrene were mixed and added to isopropyl alcohol (20 times the weight of the mixture), stirred evenly, and sent to a reactor. Nitrogen was introduced and the reactor temperature was adjusted to 140°C. Ricinoleic acid and initiator were added and stirred for 6 hours. The discharged material was cooled to obtain a polymer emulsion.

[0042] (3) Take expanded perlite, calcine it at 800°C for 2 hours, grind it into fine powder after cooling, mix it with ethylene bisstearamide, add it to deionized water 40 times the weight of the mixture, ultrasonicate it for 20 minutes, blend it with the above polymer emulsion, add SP-80, continue ultrasonic dispersion for 20 minutes, raise the temperature to 75°C, keep stirring for 3 hours, filter it with suction, wash the filter cake with water, dry it under vacuum at 120°C for 2 hours, and cool it to room temperature to obtain a composite filler;

[0043] (4) Take aminopropyl triethoxysilane, add it to 40 times its weight of anhydrous ethanol, stir evenly, add 15% of the weight of silicone rubber, stir evenly, remove the ethanol by rotary evaporation, and dry at room temperature to obtain a premixed rubber;

[0044] (5) Take the above premixed rubber material, blend it with the composite filler, send it into the internal mixer, mix it at 105℃ for 15 minutes, add the remaining silicone rubber and antioxidant RD after cooling, and turn it over on the machine. After the rubber material is rolled, add bis(2,4-dichlorobenzoyl) peroxide to the rubber material, and finally make triangle bags 5 times each. After the sheet is put down, it is obtained.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An inorganic mineral insulated high temperature resistant instrument communication cable, characterized in that: The invention comprises at least two wire cores, each wire core comprising two conductors (1), the conductors (1) being coated with an inorganic mineral insulation layer (2), the two conductors (1) coated with the inorganic mineral insulation layer (2) being twisted and then sequentially coated with a heat-insulating inner wrapping layer (3) and a copper tape shielding layer (4) from the inside to the outside to form a cable core, and the outer side of the cable core being sequentially coated with a heat-insulating outer wrapping layer (5), a copper tape shielding layer (6), and a corrugated copper sheath (7) from the inside to the outside; The heat-insulating and cooling inner wrapping layer (3) is formed by wrapping a mixture of ceramic silicone tape and glass fiber tape; The ceramic silicone tape in the heat-insulating and cooling inner wrapping layer (3) is composed of the following raw materials in parts by weight: Silicone rubber 130-140, bis(2,4-dichlorobenzoyl) peroxide 2-3, expanded perlite 17-20, ricinoleic acid 1-2, ethylene bisstearamide 3-5, sp-80 2-3, antioxidant RD 2-3, aminopropyl triethoxysilane 4-6, phthalate 6-10, styrene 30-40, dicumyl peroxide 1-1.3; The method for preparing the ceramicized silicone tape in the heat-insulating and cooling inner wrapping layer (3) comprises the following steps: (1) Take dicumyl peroxide, add it to 20-30 times its weight of isopropyl alcohol, and stir evenly to obtain an initiator; (2) Take phthalate and styrene, mix them, add them to isopropanol 10-20 times the weight of the mixture, stir them evenly, send them into a reactor, introduce nitrogen, adjust the reactor temperature to 130-140°C, add ricinoleic acid and initiator, stir and react for 4-6 hours, cool the discharged material, and obtain a polymer emulsion; (3) Take expanded perlite, calcine it at 700-800℃ for 1-2 hours, grind it into fine powder after cooling, mix it with ethylene bisstearamide, add it into deionized water 30-40 times the weight of the mixture, ultrasonicate it for 10-20 minutes, blend it with the above polymer emulsion, add SP-80, continue ultrasonic dispersion for 10-20 minutes, increase the temperature to 70-75℃, keep stirring for 2-3 hours, filter it, wash the filter cake with water, dry it under vacuum at 110-120℃ for 1-2 hours, and cool it to room temperature to obtain a composite filler; (4) Take aminopropyl triethoxysilane, add it to 30-40 times of its weight of anhydrous ethanol, stir evenly, add 10-15% of the weight of silicone rubber, stir evenly, remove ethanol by rotary evaporation, and dry at room temperature to obtain a premixed rubber; (5) Take the above premixed rubber material, blend it with the composite filler, send it into the internal mixer, mix it at 100-105℃ for 10-15 minutes, add the remaining silicone rubber and antioxidant RD after cooling, and turn it over on the machine. After the rubber material is rolled, add bis(2,4-dichlorobenzoyl) peroxide to the rubber material, and finally make triangle bags 5 times each. After the sheet is put down, it is obtained.

2. The inorganic mineral insulated high temperature resistant instrument communication cable according to claim 1, characterized in that: The heat-insulating and cooling outer wrapping layer (5) is formed by wrapping with synthetic mica tape.

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