CN112768121B - Flexible high-temperature-resistant fireproof cable and preparation method thereof - Google Patents
Flexible high-temperature-resistant fireproof cable and preparation method thereof Download PDFInfo
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- CN112768121B CN112768121B CN202110109875.5A CN202110109875A CN112768121B CN 112768121 B CN112768121 B CN 112768121B CN 202110109875 A CN202110109875 A CN 202110109875A CN 112768121 B CN112768121 B CN 112768121B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 56
- 239000002184 metal Substances 0.000 claims description 56
- 239000003063 flame retardant Substances 0.000 claims description 52
- 230000003014 reinforcing effect Effects 0.000 claims description 48
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 37
- 238000011049 filling Methods 0.000 claims description 31
- 230000009970 fire resistant effect Effects 0.000 claims description 27
- 239000010445 mica Substances 0.000 claims description 26
- 229910052618 mica group Inorganic materials 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 23
- 239000003365 glass fiber Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 10
- 239000000741 silica gel Substances 0.000 claims description 10
- 229910002027 silica gel Inorganic materials 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005491 wire drawing Methods 0.000 claims description 3
- 241000209094 Oryza Species 0.000 claims 2
- 235000007164 Oryza sativa Nutrition 0.000 claims 2
- 235000009566 rice Nutrition 0.000 claims 2
- 239000000945 filler Substances 0.000 claims 1
- 229910052736 halogen Inorganic materials 0.000 claims 1
- 150000002367 halogens Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention belongs to the technical field of wires and cables, and particularly relates to a flexible high-temperature-resistant fireproof cable and a preparation method thereof.
Description
Technical Field
The invention belongs to the technical field of wires and cables, and particularly relates to a flexible high-temperature-resistant fireproof cable and a preparation method thereof.
Background
Along with the continuous deepening of people's dangerous understanding of fire hazard to electric wire and cable problem initiation, performance requirements such as fire prevention and flame retardance to electric wire and cable are also gradually increasing, under the condition of meeting the emergence fire, fire control equipment such as fire elevator, fire pump need keep normal operating in certain time, consequently, electric wire and cable that bears these equipment transmission of electricity just need possess higher fire prevention and heat resistance's performance, general fire prevention cable insulation adopts the package mica, mica easily drops under the high temperature, insulating properties is poor, in addition, the cable does not have the insulating layer, in the state of catching fire, heat transfer is fast, the conductor temperature is high, the line loss is big, pressure drop is big, fire control equipment normal start has been restricted, common cladding device is the pressfitting many times simultaneously, make the tenability of insulating skin decline, lead to cable stability and mechanical properties life-span decline.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the flexible high-temperature-resistant fireproof cable which has the advantages of simple structure, low cost, low manufacturing technical requirements, excellent insulation, fire resistance and waterproof performance and meets the fire-fighting and disaster-relief requirements.
The aim of the invention is achieved by the following technical scheme: the flexible high-temperature-resistant fireproof cable comprises an insulating wire core, a flame-retardant filling layer, a flame-retardant layer, a waterproof layer, a high-flame-retardant glass fiber tape layer, a mica layer, a metal reinforcing tape and an outer sheath which are sequentially arranged from inside to outside, wherein the insulating wire core comprises a wire core conductor and a ceramic silica gel insulating layer coated outside the wire core conductor;
The fire-retardant filling layer is filled by fire-proof material and forms, fire-retardant layer, waterproof layer have been crowded package in proper order outside the fire-retardant filling layer, the waterproof layer is in proper order around being wrapped up high fire-retardant glass fiber band layer, mica layer, the mica layer is outward to be wrapped up with the metal reinforcing band, be equipped with punctiform or the recess of intermittent strip shape on the metal reinforcing band, the intussuseption of recess is filled with dry powder extinguishing agent, the outer crowded package of metal reinforcing band has the oversheath.
Preferably, the refractory layer is a mixed coating of carbon fiber and Wen Taojiao, the carbon fiber can resist high temperature of more than 3000 ℃, has outstanding heat resistance, and compared with other materials, the strength of the carbon fiber begins to decrease when the temperature is higher than 1500 ℃, and the higher the temperature is, the higher the fiber strength is.
Preferably, the fireproof material of the flame-retardant filling layer is formed by mixing magnesium hydroxide, calcium powder, clay and an adhesive.
Preferably, a layer of halogen-free tape is wrapped between the flame retardant filling layer and the first refractory layer.
Preferably, the fire-resistant layer and the waterproof layer are coated on the conductor in a double-layer co-extrusion mode, so that the fire-resistant layer and the waterproof layer are better attached together.
Preferably, the metal reinforcing belt is an embossed metal belt, the embossed metal belt is densely provided with dot grooves, and the dot grooves are filled with dry powder extinguishing agent, because the metal reinforcing belt is wrapped on the mica layer, a sealed cavity capable of containing dry powder is formed between the metal reinforcing belt and the mica layer at the position of the dot grooves, and the metal reinforcing belt is externally extruded with an outer sheath, so that the dry powder extinguishing agent can be dried.
Preferably, the metal reinforcing belt is an elastic steel belt, the elastic steel belt is provided with a discontinuous strip-shaped groove, the elastic steel belt is wrapped on the mica layer, a closed cavity capable of containing the dry powder extinguishing agent is formed between the elastic steel belt and the mica layer at the position of the discontinuous strip-shaped groove, and an outer sheath is extruded outside the metal reinforcing belt to ensure the drying of the dry powder extinguishing agent.
Preferably, the metal reinforcing belts are positioned at the two ends of the intermittent strip-shaped grooves, the thickness of the metal is not more than half of the thickness of the rest parts of the metal reinforcing belts, and when a fire occurs, the ends of the intermittent strip-shaped grooves are fused first, and the metal reinforcing belts are ejected out, so that the dry powder extinguishing agent is sprayed out to extinguish the fire.
Preferably, the thickness of the metal reinforcing tape is not more than 1mm, and is double tape while the gap is wrapped around the mica layer.
The invention also comprises a preparation method of the fireproof cable, which comprises the following steps:
Step one, a copper monofilament is subjected to wire drawing and annealing treatment to obtain annealed copper wires, and a plurality of the annealed copper wires are stranded to obtain a wire core conductor;
coating a ceramic silica gel insulating layer on the surface of the wire core conductor;
step three, extruding a flame-retardant filling layer on the surface of the ceramic silica gel insulating layer in the step two, wherein during extrusion, a feeding port of an extruder is provided with a meter weight controller, the meter weight controller is connected with an online ultrasonic thickness measuring system, and the online ultrasonic thickness measuring system is arranged at a discharging end outside a mouth die of the extruder;
Step four, extruding a fire-resistant layer and a waterproof layer on the surface of the fire-resistant filling layer, wherein the fire-resistant layer and the waterproof layer are coated on the fire-resistant layer and the waterproof layer in a double-layer co-extrusion mode, so that the fire-resistant layer and the waterproof layer are better attached together;
step five, sequentially wrapping a high flame retardant glass fiber tape layer, a mica layer and a metal reinforcing tape on the surface of the waterproof layer from inside to outside, and filling dry powder extinguishing agent in the punctiform or discontinuous strip-shaped grooves of the metal reinforcing tape while wrapping the metal reinforcing tape;
and step six, coating an outer sheath on the surface of the metal reinforcing belt.
Preferably, after the flame-retardant filling layer is extruded in the third step, a layer of halogen-free tape is wrapped on the surface of the flame-retardant filling layer, so that the flame-retardant filling layer can be more compact.
Preferably, in the fourth step, the fire-resistant layer and the waterproof layer are coated on the extruder in a double-layer coextrusion mode, the feeding port of the extruder is provided with a meter weight controller, the meter weight controller is connected with an online ultrasonic thickness measuring system, and the online ultrasonic thickness measuring device is arranged at the discharging end outside the mouth die of the extruder, so that the extrusion thickness of the fire-resistant layer and the fireproof layer of the cable is more uniform;
The high-flame-retardant glass fiber belt can be decomposed into metal oxide and precipitated crystal water at a certain temperature, and plays roles in adsorbing smoke, settling smoke particles, absorbing heat and blocking the flow of oxygen and combustible gas, so that further combustion of a cable can be prevented.
The beneficial effects are that: the invention has simple structure, low cost and strong applicability, has excellent insulation, fire resistance and water resistance, and meets the fire-fighting and disaster-relief requirements.
Drawings
The specific structure of the present application is shown in the following drawings and examples:
Fig. 1: the structure of embodiment 1 of the present invention is schematically shown.
Fig. 2: the metal reinforcing tape of embodiment 1 of the present invention is schematically shown in structure.
Fig. 3: the structure of embodiment 2 of the present invention is schematically shown.
Fig. 4: the metal reinforcing tape of embodiment 2 of the present invention is schematically shown in structure.
In the figure: 1. the cable comprises an insulating cable core, a flame-retardant filling layer, a flame-retardant layer, a waterproof layer, a high flame-retardant glass fiber tape layer, a mica layer, a metal reinforcing tape, an outer sheath, a cable core conductor, a ceramic silica gel insulating layer, a halogen-free tape, a groove, a embossed metal tape, a flexible steel tape, a dot-shaped groove and a discontinuous strip-shaped groove, wherein the flame-retardant filling layer is arranged in the insulating cable core, the flame-retardant glass fiber tape layer is arranged in the insulating cable core, the flame-retardant filling layer is arranged in the flame-retardant glass fiber tape layer, the flame-retardant glass fiber tape layer is arranged in the insulating cable core, the flame-retardant glass fiber tape layer is arranged in the flame-retardant glass fiber tape layer, the mica layer is arranged in the flame-retardant glass fiber tape layer, the flame-retardant glass fiber tape layer is arranged in the flame-retardant glass fiber tape, the metal reinforcing tape layer is arranged in the flame-retardant glass fiber tape.
Detailed Description
The following description of the present invention is provided to explain the summary of the invention in further detail. And therefore, the invention is not limited to the scope of the patent, and all equivalent structures or equivalent flow changes made by the specification and drawings of the invention or direct or indirect application in other related technical fields are included in the scope of the patent protection of the invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of the drawings in the specification, such as: the positional relationship of the upper, lower, left, right, etc. is determined in accordance with the layout direction in the drawings of the specification.
Embodiment 1, refer to fig. 1 and 2, a flexible high temperature resistant fireproof cable, which comprises an insulation wire core 1, a flame retardant filling layer 2, a flame retardant layer 3, a waterproof layer 4, a high flame retardant glass fiber tape layer 5, a mica layer 6, a metal reinforcing tape 7 and an outer sheath 8 which are sequentially arranged from inside to outside, wherein the insulation wire core 1 comprises a wire core conductor 11 and a ceramic silica gel insulation layer 12 coated outside the wire core conductor 11;
The fire-retardant filling layer 2 is formed by filling fireproof materials, the fire-retardant filling layer 2 is externally sequentially extruded with a fire-retardant layer 3 and a waterproof layer 4, the waterproof layer 4 is externally sequentially wrapped with a high fire-retardant glass fiber tape layer 5 and a mica layer 6, the mica layer 6 is externally wrapped with a metal reinforcing tape 7, the metal reinforcing tape 7 is provided with a punctiform or discontinuous strip-shaped groove 71, the groove 71 is internally filled with dry powder extinguishing agent, and the metal reinforcing tape 7 is externally extruded with an outer sheath 8.
Preferably, the refractory layer 3 is a mixed coating of carbon fiber and Wen Taojiao, the carbon fiber can withstand high temperature of more than 3000 ℃, has outstanding heat resistance, and compared with other materials, the strength of the carbon fiber begins to decrease when the temperature is higher than 1500 ℃, and the higher the temperature is, the higher the fiber strength is.
Preferably, the fireproof material of the flame-retardant filling layer 2 is formed by mixing magnesium hydroxide, calcium powder, clay and an adhesive.
Preferably, the refractory layer 3 and the waterproof layer 4 are coated on the conductor in a double-layer co-extrusion mode, so that the refractory layer and the waterproof layer are better attached together.
Preferably, the metal reinforcing belt 7 is an embossed metal belt 72, the embossed metal belt 72 is densely provided with dot grooves 721, and the dot grooves 721 are filled with a dry powder extinguishing agent, because the metal reinforcing belt 7 is wrapped on the mica layer 6, a sealed cavity capable of containing dry powder is formed between the metal reinforcing belt 7 and the mica layer 6 at the position of the dot grooves 721, and an outer sheath 8 is extruded outside the metal reinforcing belt 7, so that the dry powder extinguishing agent can be dried, and when the embossed metal belt 72 is melted by fire, dry powder in the grooves is sprayed out, oxygen can be isolated at the initial stage of fire, the fire can be effectively extinguished, and the fire can be prevented from further diffusing.
The invention also comprises a preparation method of the fireproof cable, which comprises the following steps:
step one, a copper monofilament is subjected to wire drawing and annealing treatment to obtain annealed copper wires, and a plurality of the annealed copper wires are stranded to obtain a wire core conductor 11;
step two, coating a ceramic silica gel insulating layer 12 on the surface of the wire core conductor;
step three, extruding and wrapping the flame-retardant filling layer 2 on the surface of the ceramic silica gel insulating layer 12 in the step two, wherein during extrusion, a feeding port of an extruder is provided with a meter weight controller, the meter weight controller is connected with an online ultrasonic thickness measuring system, and the online ultrasonic thickness measuring system is arranged at a discharging end outside a mouth die of the extruder;
Step four, extruding and wrapping the fire-resistant layer 3 and the waterproof layer 4 on the surface of the fire-resistant filling layer 2, wherein the fire-resistant layer 3 and the waterproof layer 4 are coated on the fire-resistant layer by adopting a double-layer co-extrusion mode, so that the fire-resistant layer 3 and the waterproof layer 4 are better attached together;
step five, sequentially wrapping the high flame retardant glass fiber tape layer 5, the mica layer 6 and the metal reinforcing tape 7 on the surface of the waterproof layer 4 from inside to outside, and filling dry powder extinguishing agent in the punctiform or discontinuous strip-shaped grooves 71 of the metal reinforcing tape 7 while wrapping the metal reinforcing tape 7;
And step six, coating an outer sheath 8 on the surface of the metal reinforcing belt 7.
Referring to fig. 3 and 4, in embodiment 2, a layer of halogen-free tape 21 is wrapped between the flame retardant filling layer 2 and the flame retardant layer 3, so that the flame retardant filling layer 2 can be more compact, the metal reinforcing tape 7 is an elastic steel tape 73, an intermittent strip-shaped groove 731 is arranged on the elastic steel tape 73, the elastic steel tape 73 is wrapped on the mica layer 6, a closed cavity capable of containing dry powder extinguishing agent is formed between the elastic steel tape 73 and the mica layer 6 at the position of the intermittent strip-shaped groove 731, an outer sheath 8 is extruded outside the metal reinforcing tape 7, drying of the dry powder extinguishing agent is ensured, the thickness of the metal reinforcing tape 7 is not more than 0.5-0.8mm, the thickness of metal at two ends of the intermittent strip-shaped groove is not more than half of the thickness of the rest of the intermittent strip-shaped groove, and when fire is on fire, the end of the intermittent strip-shaped groove 731 is fused first, and the metal reinforcing tape ejects out dry powder extinguishing agent.
In embodiment 3, as a further optimization of embodiment 1, in step four of the preparation method of the fireproof cable, the fireproof layer 3 and the waterproof layer 4 are coated on the fireproof cable in a double-layer co-extrusion manner, the feeding port of the extruder is provided with a meter weight controller, the meter weight controller is connected with an online ultrasonic thickness measuring system, and the online ultrasonic thickness measuring instrument is arranged at the discharging end outside the mouth mold of the extruder, so that the extrusion thickness of the fireproof layer and the fireproof layer of the cable is more uniform.
Claims (7)
1. The flexible high-temperature-resistant fireproof cable is characterized by comprising an insulating wire core, a flame-retardant filling layer, a flame-retardant layer, a waterproof layer, a high-flame-retardant glass fiber tape layer, a mica layer, a metal reinforcing tape and an outer sheath which are sequentially arranged from inside to outside, wherein the insulating wire core comprises a wire core conductor and a ceramic silica gel insulating layer coated outside the wire core conductor;
The fire-retardant filling layer is filled by fireproof materials, a fire-retardant layer and a waterproof layer are sequentially extruded outside the fire-retardant filling layer, a high-fire-retardant glass fiber tape layer and a mica layer are sequentially wrapped outside the waterproof layer, a metal reinforcing tape is wrapped outside the mica layer, the metal reinforcing tape is an elastic steel tape, an intermittent strip-shaped groove is formed in the elastic steel tape, a closed cavity capable of containing dry powder extinguishing agent is formed between the elastic steel tape and the mica layer at the intermittent strip-shaped groove position, the dry powder extinguishing agent is filled in the groove, and an outer sheath is extruded outside the metal reinforcing tape; the thickness of the metal reinforcing belt at the two ends of the intermittent strip-shaped groove is not more than half of the thickness of the rest part of the metal reinforcing belt.
2. A flexible high temperature resistant fire resistant cable according to claim 1 wherein said fire resistant layer is a hybrid coating of carbon fiber and Wen Taojiao.
3. The flexible high temperature resistant fireproof cable of claim 1, wherein the fireproof material of the flame retardant filling layer is formed by mixing magnesium hydroxide, calcium powder, clay and an adhesive.
4. A flexible, high temperature resistant, fire resistant cable according to any one of claims 1 to 3 wherein a layer of halogen free tape is wrapped between the fire resistant filler layer and the first fire resistant layer.
5. A flexible high temperature resistant fire resistant cable according to any one of claims 1 to 3 wherein said fire resistant layer and said water resistant layer are coated on said conductor by means of double co-extrusion.
6. A flexible, high temperature resistant, fire resistant cable according to claim 1, characterised in that the method of preparation comprises the steps of:
Step one, a copper monofilament is subjected to wire drawing and annealing treatment to obtain annealed copper wires, and a plurality of the annealed copper wires are stranded to obtain a wire core conductor;
coating a ceramic silica gel insulating layer on the surface of the wire core conductor;
step three, extruding a flame-retardant filling layer on the surface of the ceramic silica gel insulating layer in the step two, wherein during extrusion, a feeding port of an extruder is provided with a meter weight controller, the meter weight controller is connected with an online ultrasonic thickness measuring system, and the online ultrasonic thickness measuring system is arranged at a discharging end outside a mouth die of the extruder;
Step four, extruding a fire-resistant layer and a waterproof layer on the surface of the fire-resistant filling layer, wherein the fire-resistant layer and the waterproof layer are coated on the fire-resistant layer and the waterproof layer in a double-layer co-extrusion mode, so that the fire-resistant layer and the waterproof layer are better attached together;
step five, sequentially wrapping a high flame retardant glass fiber tape layer, a mica layer and a metal reinforcing tape on the surface of the waterproof layer from inside to outside, and filling dry powder extinguishing agent in the punctiform or discontinuous strip-shaped grooves of the metal reinforcing tape while wrapping the metal reinforcing tape;
And step six, extruding an outer sheath on the surface of the metal reinforcing belt.
7. The flexible high temperature resistant fireproof cable of claim 6, wherein in step four, the fireproof layer and the waterproof layer are coated on the fireproof layer and the waterproof layer in a double-layer coextrusion mode, the feeding holes of the extruder are respectively provided with a rice weight controller, and the rice weight controllers are as follows
And the online ultrasonic thickness gauge is connected with an online ultrasonic thickness measuring system, and is arranged at the discharge end outside the extruder die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109875.5A CN112768121B (en) | 2021-01-27 | 2021-01-27 | Flexible high-temperature-resistant fireproof cable and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109875.5A CN112768121B (en) | 2021-01-27 | 2021-01-27 | Flexible high-temperature-resistant fireproof cable and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112768121A CN112768121A (en) | 2021-05-07 |
| CN112768121B true CN112768121B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110109875.5A Active CN112768121B (en) | 2021-01-27 | 2021-01-27 | Flexible high-temperature-resistant fireproof cable and preparation method thereof |
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| CN113782280B (en) * | 2021-08-04 | 2023-12-26 | 嘉兴奥亿普数据电缆有限公司 | Flame-retardant and wear-resistant treatment process for cable |
| CN114030242A (en) * | 2021-10-25 | 2022-02-11 | 上海柘歆科技集团有限公司 | Fireproof coating material for smoke-discharge preventing pipeline and manufacturing method |
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