CN115151980A - High-voltage-resistant cable for big data transmission and preparation method and application thereof - Google Patents
High-voltage-resistant cable for big data transmission and preparation method and application thereof Download PDFInfo
- Publication number
- CN115151980A CN115151980A CN202280001799.9A CN202280001799A CN115151980A CN 115151980 A CN115151980 A CN 115151980A CN 202280001799 A CN202280001799 A CN 202280001799A CN 115151980 A CN115151980 A CN 115151980A
- Authority
- CN
- China
- Prior art keywords
- cable
- area
- insulating layer
- conductor
- extruder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
-
- 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
- H01B13/02—Stranding-up
-
- 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
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
Abstract
Disclosed herein are a high voltage resistant cable for large data transmission, a method for preparing the same and applications thereof. The high-voltage-resistant cable comprises at least two wire cores, each wire core is composed of a conductor and an insulating layer coated outside the conductor, every two wire cores are twisted to form a cable core, and the cable core is sequentially coated with a total insulating layer, a shielding layer and an outer sheath. In the high-voltage-resistant cable, the insulating layer arranged outside the conductor is matched with the total insulating layer arranged outside the cable core, so that the voltage resistance of the prepared cable is effectively improved, and the cable meets the requirements of a cable for large data transmission.
Description
Technical Field
The application relates to the technical field of cables, for example, to a high-voltage-resistant cable for large data transmission and a preparation method and application thereof.
Background
The cable is widely applied to a plurality of fields related to people's life, industrial production and the like, so the consumption of the cable is extremely large, and the requirement on the quality of the cable is high. The requirements on the quality and the application of the cable in different fields are different, for example, in the fields of petroleum, chemical industry and aviation trains, the cable is required to have better tensile property and high pressure resistance so as to ensure the durability of the cable and meet the requirements. With the rapid development of internet enterprises, the capacity of a large data system processing center is larger and larger, so that the requirement on the safety and stability of a power transformation system is higher and higher, and further the requirements on the safety and the pressure resistance of a cable for large data transmission are higher and higher.
There are many types of cables reported for data transmission. CN104733085A discloses a high voltage resistant industrial cable, which includes a cable body, the cable body includes a conductor, an insulating layer, a shielding layer and an outer sheath, a plurality of conductors are arranged inside the cable body, and the cross section of the conductor is a circular structure; the drainage core is arranged at the central position of the cable body, the conductor is tightly extruded with an insulating layer, and a gap part formed between the insulating layer and the conductor is provided with a filling layer; a shielding layer is tightly extruded outside the insulating layer; the shielding layer is sequentially extruded and wrapped with an armor layer and a reinforcing layer from inside to outside; an outer sheath is tightly extruded outside the reinforcing layer; the cable has good shielding performance, bending resistance and high conductivity, and also has high voltage resistance and anti-magnetic interference performance. CN104810109A discloses a moisture-proof high-voltage resistant power cable, which includes a cable body, wherein the cable body includes a conductor, an insulating layer, a shielding layer and an outer sheath. A plurality of conductors are arranged in the cable body; a layer of glass fiber tube is arranged outside the conductor; the glass fiber tube and the conductor jointly form a cable core; an insulating layer is tightly extruded outside the cable core; a filler is arranged in a gap part between the insulating layer and the cable core; a shielding layer is tightly extruded outside the insulating layer; the shielding layer is sequentially extruded and wrapped with a reinforcing braid layer and an anti-corrosion layer from inside to outside; the outer sheath is tightly extruded outside the anti-corrosion layer, and the cable has the advantages of excellent water-blocking and moisture-proof performance, long service life and the like by reasonable integral structure.
With the increasing capacity of a processing center of a large data system, the requirement on the safety and stability of a power transformation system is higher, the conventional voltage at the output end of the power transformation system is only hundreds of volts, but the instantaneous voltage of a line can reach 13kV or more due to the instability of the power transformation system and the external emergency, and the common cable is difficult to meet the requirement, so that irreversible damage is often caused.
Disclosure of Invention
The application provides a high voltage resistant cable for big data transmission and a preparation method and application thereof, in the high voltage resistant cable, the total insulating layer and the insulating layer are arranged for collocation, so that the obtained cable has excellent high voltage resistance, and the requirement of processing and using of a big data system can be met.
In a first aspect, the application provides a high voltage resistant cable for big data transmission, high voltage resistant cable includes two piece at least sinle silks, and every sinle silk is by the conductor and the cladding is in insulating layer outside the conductor constitutes, and per two sinle silks transposition forms the cable core, the cable core has total insulating layer, shielding layer and oversheath in proper order the cladding outward.
The application provides a high tension cable's section structure sketch map is shown in fig. 1, wherein, 1 represents the conductor, 2 represents the insulating layer, 2 cladding of insulating layer form the sinle silk on 1 surface of conductor, per two sinle silks pair twist form the cable core, 3 represent total insulating layer, 3 cladding of total insulating layer is outside the cable core, total insulating layer 3 outward still has shielding layer 4 and oversheath 5 of cladding in proper order, set up total insulating layer 3 between cable core and shielding layer 4, make it can coordinate with insulating layer 2, guarantee that the cable that obtains has excellent high pressure resistance.
The large data in the high-voltage-resistant cable for large data transmission in the application refers to a data set which is large in scale and greatly exceeds the capability range of a traditional database software tool in the aspects of acquisition, storage, management and analysis, and has four characteristics of massive data scale, rapid data circulation, various data types and low value density, and the high-voltage-resistant cable refers to the alternating-current voltage capable of resisting up to 13 kV.
In one embodiment, the conductor is a tin-plated copper conductor.
As a technical scheme of this application, select tin-plated copper conductor as the conductor of the high voltage resistant cable that this application provided can prevent to use pure copper to contact the back and the oxidation for a long time with the air, and then influence the problem of the conductivity of self and signal transmission efficiency.
In one embodiment, the tin-plated copper conductor is formed by stranding tin-plated copper wires.
In one embodiment, the diameter of the tinned copper wire is 0.19-0.205 mm, such as 0.192mm, 0.194mm, 0.196mm, 0.198mm, 0.2mm, 0.202mm, or 0.204 mm.
In one embodiment, the tinned copper wire is obtained by tinning a copper wire.
As a technical scheme of this application, the copper wire that this application was selected is the high-purity copper wire that the purity is 99.99%, and then can guarantee that the tinned copper wire that obtains has higher electric conductivity.
In one embodiment, the resistivity of the tinned copper wire is about 0.0167 omega mm 2 /m。
In one embodiment, the insulating layer is a polyethylene insulating layer made of polyethylene having a resistivity of not less than 6 × 1014 Ω · m (20 ℃).
In one embodiment, the thickness of the polyethylene insulation layer is not less than 0.6mm, such as 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm.
In one embodiment, the total insulation layer is a polyethylene total insulation layer.
In one embodiment, the total insulating layer has a thickness of no less than 1.3mm, such as 1.35mm, 1.4mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, or 1.65mm, etc.
In one embodiment, the shielding layer is a tinned copper wire braided shielding layer.
In one embodiment, the diameter of the tinned copper wire in the tinned copper wire braided shielding layer is 0.1-0.12 mm, such as 0.102mm, 0.104mm, 0.106mm, 0.108mm, 0.11mm, 0.112mm, 0.114mm, 0.116mm, or 0.118 mm.
In one embodiment, the outer sheath is a polyvinyl chloride outer sheath.
In one embodiment, the outer sheath has a thickness of no less than 1.5mm, such as 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm, 1.85mm, or 1.9mm, etc.
In one embodiment, the outer sheath is further coated with a polyamide layer.
As a technical scheme of this application, set up the security that the polyamide layer helps promoting high tension resistant cable in the outside of outer sheath, the polyamide layer can prevent effectively that gnawing of rodent from stinging and destroying the cable construction.
In one embodiment, the thickness of the polyamide layer is not less than 0.5mm, such as 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, or 0.9 mm.
In a second aspect, the present application provides a method for preparing a high voltage resistant cable for large data transmission according to the first aspect, the method comprising the following steps:
(1) Extruding an insulating layer material outside the conductor to obtain a wire core;
(2) Twisting every two wire cores obtained in the step (1) in pairs to obtain a cable core;
(3) And (3) extruding a total insulating layer material outside the cable core obtained in the step (2), weaving a shielding layer material, and extruding an outer sheath material to obtain the high-voltage-resistant cable.
In one embodiment, the extrusion of step (1) is performed by a type 70 extruder.
In the preparation method that this application provided, the insulating layer material passes through 70 type extruding machines cladding in the conductor outside, at the in-process of cladding, need cooperate infrared deviation meter and host controller linkage, guarantee that the core concentricity reaches more than 95%, and the aircraft nose installs the evacuation machine additional, guarantee that the insulating layer material can closely the cladding on tin-plated copper conductor, the core that obtains after the cladding adopts syllogic water cooling, and then can guarantee that the core cools off to the room temperature fast, still need inspect the thinnest point thickness of insulating layer after the cladding is accomplished, concentricity and apparent quality, the core that guarantees to obtain does not have any defect side and can carry out next process.
In one embodiment, the type 70 extruder has a screw length to diameter ratio of 12 to 20, such as 13, 14, 15, 16, 17, 18, or 19, and the like.
In one embodiment, the processing temperatures of the zones of the type 70 extruder are: 155 to 165 ℃ in the 1-region (for example, 156 ℃, 157 ℃, 158 ℃, 159 ℃, 160 ℃, 161 ℃, 162 ℃, 163 ℃ or 164 ℃, etc.), 165 to 175 ℃ in the 2-region (for example, 166 ℃, 167 ℃, 168 ℃, 169 ℃, 170 ℃, 171 ℃, 172 ℃, 173 ℃, or 174 ℃, etc.), 175 to 185 ℃ in the 3-region (for example, 176 ℃, 177 ℃, 178 ℃, 179 ℃, 180 ℃, 181 ℃, 182 ℃, 183 ℃, or 184 ℃, etc.), 185 to 195 ℃ in the 4-region (for example, 186 ℃, 187 ℃, 188 ℃, 189 ℃, 190 ℃, 191 ℃, 192 ℃, 193 ℃, or 194 ℃, etc.), 185 to 195 ℃ in the 5-region (for example, 186 ℃, 187 ℃, 188 ℃, 189 ℃, 190 ℃, 191 ℃, 192 ℃, 193 ℃, or 194 ℃, etc.), and 190 to 200 ℃ in the head temperature (for example, 191 ℃, 192 ℃, 193 ℃, 195 ℃, 196 ℃, 197 ℃, 198 ℃, 199 ℃, etc.).
In one embodiment, the pair twisting in the step (2) is back-twisted pair twisting.
In one embodiment, the pair twisting in the step (2) is performed on a single twisting machine, and the take-up speed and the pair twisting speed of the single twisting machine need to be controlled to ensure that the twisting pitch meets the requirements.
In one embodiment, the twist pitch of the pair of strands in step (2) is not greater than 50mm, such as 45mm, 40mm, 35mm, 30mm, 25mm, 20mm, 15mm, or 10 mm.
In one embodiment, the extruding of the total insulation layer material in the step (3) is performed by a type 70 extruder, and after the extruding of the total insulation layer material is completed, the thinnest point thickness and the apparent mass of the total insulation layer also need to be checked, and the next procedure can be performed after no defect exists.
In one embodiment, the type 70 extruder has a screw length to diameter ratio of 12 to 20, such as 13, 14, 15, 16, 17, 18, or 19, and the like.
In one embodiment, the multiple zones of the type 70 extruder are operated at respective temperatures of: 155 to 165 ℃ in region 1 (e.g., 156 ℃, 157 ℃, 158 ℃, 159 ℃, 160 ℃, 161 ℃, 162 ℃, 163 ℃ or 164 ℃, etc.), 165 to 175 ℃ in region 2 (e.g., 166 ℃, 167 ℃, 168 ℃, 169 ℃, 170 ℃, 171 ℃, 172 ℃, 173 ℃, or 174 ℃, etc.), 175 to 185 ℃ in region 3 (e.g., 176 ℃, 177 ℃, 178 ℃, 179 ℃, 180 ℃, 181 ℃, 182 ℃, 183 ℃, or 184 ℃, etc.), 185 to 195 ℃ in region 4 (e.g., 186 ℃, 187 ℃, 188 ℃, 189 ℃, 190 ℃, 191 ℃, 192 ℃, 193 ℃, or 194 ℃, etc.), 185 to 195 ℃ in region 5 (e.g., 186 ℃, 187 ℃, 188 ℃, 189 ℃, 190 ℃, 191 ℃, 192 ℃, 193 ℃, 196 ℃, 197 ℃, 198 ℃, or 199 ℃, etc.), and 190 to 200 ℃ in head temperature (e.g., 191 ℃, 192 ℃, 193 ℃, 194 ℃, 195 ℃, 196 ℃, 197 ℃, 198 ℃, 199 ℃, etc.).
In one embodiment, the knitting in step (3) is performed by using a 16-spindle knitting machine or a 24-spindle knitting machine; joints are not needed in the weaving process, and if the joints need to be connected, the joints are required to be smooth and damage to the total insulating layer is not allowed.
In one embodiment, the angle of the weaving in step (3) is 30 to 60 °, for example, 35 °, 40 °, 45 °, 50 °, or 55 °.
In one embodiment, the density of the weave in step (3) is not less than 90%, such as 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99%.
In one embodiment, the extruding of the outer sheath material in step (3) is performed by a type 90 extruder.
In one embodiment, the plurality of zones of the type 90 extruder are operated at: 1 region 135-145 deg.C (e.g., 136 deg.C, 137 deg.C, 138 deg.C, 139 deg.C, 140 deg.C, 141 deg.C, 142 deg.C, 143 deg.C, 144 deg.C, etc.), 2 region 155-165 deg.C (e.g., 156 deg.C, 157 deg.C, 158 deg.C, 159 deg.C, 160 deg.C, 161 deg.C, 162 deg.C, 163 deg.C, 164 deg.C, etc.), 3 region 165-175 deg.C (e.g., 166 deg.C, 167 deg.C, 168 deg.C, 169 deg.C, 170 deg.C, 171 deg.C, 172 deg.C, 173 deg.C, 174 deg.C, etc.), and 4 region 165-175 deg.C (e.g., 166 deg.C, 167 deg.C, 168 deg.C, 170 deg.C, 171 deg.C, 172 deg.C, 173 deg.C, 174 deg.C, etc.), respectively.
In an embodiment, the step of extruding polyamide is further included after the step of extruding the outer sheath material in the step (3).
In one embodiment, the extrusion of the polyamide is carried out by a type 90 extruder.
In one embodiment, the plurality of zones of the type 90 extruder are operated at: 160-180 deg.C (e.g., 162 deg.C, 164 deg.C, 166 deg.C, 168 deg.C, 170 deg.C, 172 deg.C, 174 deg.C, 176 deg.C, or 178 deg.C) in zone 1, 190-210 deg.C (e.g., 192 deg.C, 194 deg.C, 196 deg.C, 198 deg.C, 121 deg.C, 123 deg.C, 125 deg.C, 127 deg.C, or 129 deg.C) in zone 2, 210-230 deg.C (e.g., 212 deg.C, 214 deg.C, 218 deg.C, 220 deg.C, 224 deg.C, or 228 deg.C) in zone 3, 210-230 deg.C (e.g., 212 deg.C, 214 deg.C, 216 deg.C, 218 deg.C, 220 deg.C, 222 deg.C, 224 deg.C, 226 deg.C, or 228 deg.C) in zone 4, and 230-250 deg.C (e.C) (e.C, 236 deg.C, 238 deg.C, 240 deg.C, 242 deg.C, 244 deg.C, 246 deg.C, or 248 deg.C) in zone 4) respectively).
As a technical scheme, the preparation method comprises the following steps:
(1) And extruding an insulating layer material outside the conductor by a 70 type extruding machine, wherein the length-diameter ratio of a screw rod of the 70 type extruding machine is 12-20, and the working temperatures of a plurality of regions are respectively as follows: 155-165 ℃ in the area 1, 165-175 ℃ in the area 2, 175-185 ℃ in the area 3, 185-195 ℃ in the area 4, 185-195 ℃ in the area 5, and 190-200 ℃ at the temperature of a machine head to obtain a wire core;
(2) Performing pair twisting on every two wire cores obtained in the step (1) by adopting a back-twist mode on a single twisting machine, wherein the twisting pitch is smaller than 50mm, and obtaining a cable core;
(3) Extruding a total insulating layer material outside the cable core obtained in the step (2) by a 70-type extruding machine, wherein the working temperatures of a plurality of zones of a 90-type extruding machine are respectively as follows: 155-165 ℃ in the area 1, 165-175 ℃ in the area 2, 175-185 ℃ in the area 3, 185-195 ℃ in the area 4, 185-195 ℃ in the area 5 and 190-200 ℃ in the head temperature; then, a 16-spindle braiding machine or a 24-spindle braiding machine is adopted to braid the shielding layer material, the braiding angle is 30-60 degrees, and the braiding density is more than 90 percent; and finally sequentially extruding and coating the outer sheath material and the optional polyamide by a 90-type extruding machine, wherein the working temperatures of a plurality of zones of the 90-type extruding machine for extruding and coating the outer sheath material are respectively as follows: zone 1 from 135 to 145 ℃, zone 2 from 155 to 165 ℃, zone 3 from 165 to 175 ℃, zone 4 from 165 to 175 ℃, the head and die each independently being from 165 to 175 ℃, the operating temperatures of the various zones of the type 90 extruder used to extrude the optional polyamide being: the high-voltage resistant cable is obtained by the following steps of 160-180 ℃ in a region 1, 190-210 ℃ in a region 2, 210-230 ℃ in a region 3, 210-230 ℃ in a region 4, and 230-250 ℃ in a machine head and a die opening respectively and independently.
In a third aspect, the present application provides a use of a high voltage tolerant cable for large data transmission as described in the first aspect in a power transformation system.
The high-voltage-resistant cable for big data transmission comprises at least two wire cores, wherein each wire core consists of a conductor and an insulating layer coated outside the conductor, each two wire cores are twisted to form a cable core, and the cable core is sequentially coated with a total insulating layer, a shielding layer and an outer sheath; in the high-voltage-resistant cable, the total insulating layer and the insulating layer are arranged on the outer side of the cable core for matching, so that the withstand voltage between the cable core and the shielding layer can reach 13kV, the obtained high-voltage-resistant cable can resist the high voltage of 13.7-16.8 kV, the corrosion resistance test is more than 55h, the transmission efficiency is 87.2-99.8%, and the requirement of a cable for large data transmission is met.
Drawings
Fig. 1 is a schematic cross-sectional structural diagram of a high voltage resistant cable according to an embodiment of the present application;
fig. 2 is a schematic cross-sectional structure view of another high voltage resistant cable according to an embodiment of the present application.
Wherein: 1. a conductor; 2. an insulating layer; 3. a total insulating layer; 4. a shielding layer; 5. an outer sheath; 6. a polyamide layer.
Detailed Description
The technical means of the present application will be described below by way of specific embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present application and should not be construed as a specific limitation of the present application.
Example 1
A schematic cross-sectional structure diagram of a high-voltage-resistant cable for large data transmission is shown in figure 2, and the high-voltage-resistant cable comprises two wire cores, wherein each wire core consists of a tin-plated copper conductor 1 and an insulating layer 2 coated outside the tin-plated copper conductor 1, the two wire cores are twisted to form a cable core, and a total insulating layer 3, a shielding layer 4, an outer sheath 5 and a polyamide layer 6 are sequentially coated outside the cable core;
the tinned copper conductor 1 is formed by stranding 7 tinned copper wires with the diameter of 0.195 mm; the insulating layer 2 is a polyethylene insulating layer (made of polyethylene) with the thickness of 0.6mm; the total insulation layer 3 is a polyethylene total insulation layer (the material is polyethylene) with the thickness of 1.4 mm; the shielding layer 4 is a tinned copper wire braided shielding layer made of 0.12mm tinned copper wire; the outer sheath 5 is a polyvinyl chloride outer sheath (made of polyvinyl chloride) with the thickness of 1.6 mm; the polyamide layer 6 has a thickness of 0.6mm and the material is polyamide (low/medium viscosity).
The preparation method of the high voltage resistant cable provided by the embodiment comprises the following steps:
(1) And extruding polyethylene outside the tin-plated copper conductor by a 70-type extruding machine to form an insulating layer, wherein the length-diameter ratio of a screw of the 70-type extruding machine is 15, and the working temperatures of a plurality of regions are respectively as follows: zone 1 at 160 deg.C, zone 2 at 170 deg.C, zone 3 at 180 deg.C, zone 4 at 190 deg.C, zone 5 at 190 deg.C, and head temperature at 195 deg.C to obtain wire core.
(2) And (3) performing pair twisting on the two wire cores obtained in the step (1) on a single twisting machine in a back-twist type pair twisting mode, wherein the twisting pitch is 40mm, and thus obtaining the cable core.
(3) Extruding polyethylene outside the cable core obtained in the step (2) by a 70-type extruding machine to form a total insulating layer, wherein the length-diameter ratio of a screw of the 70-type extruding machine is 15, and the working temperatures of a plurality of areas are respectively as follows: 160 ℃ in the region 1, 170 ℃ in the region 2, 180 ℃ in the region 3, 190 ℃ in the region 4, 190 ℃ in the region 5, and 195 ℃ in the head; adopt 16 spindle braiders to weave the tinned copper wire again and form the shielding layer, the angle of weaving is 50, and the density of weaving is 95%, and rethread 90 type extruding machine is the outside crowded package polyvinyl chloride of shielding layer and forms the oversheath, and the screw rod draw ratio of 90 type extruding machine is 22, and the operating temperature in a plurality of regions is respectively: 140 ℃ in the region 1, 160 ℃ in the region 2, 170 ℃ in the region 3, 170 ℃ in the region 4, and 170 ℃ in the temperature of the head and the die; and finally, extruding polyamide on the outer side of the outer sheath by a 90-type extruding machine to form a polyamide layer, wherein the length-diameter ratio of a screw of the 90-type extruding machine is 22, and the working temperatures of a plurality of regions are respectively as follows: and the temperatures of the 1 area 170 ℃, the 2 area 200 ℃, the 3 area 220 ℃, the 4 area 220 ℃, and the head and the die are 240 ℃ to obtain the high-voltage resistant cable.
Example 2
A high-voltage-resistant cable for large data transmission is shown in a schematic sectional structure diagram of fig. 1 and comprises two wire cores, wherein each wire core consists of a tin-plated copper conductor 1 and an insulating layer 2 coated outside the tin-plated copper conductor 1, the two wire cores are twisted to form a cable core, and a total insulating layer 3, a shielding layer 4 and an outer sheath 5 are sequentially coated outside the cable core; the raw materials of each layer of the high-voltage-resistant cable provided by the embodiment are the same as those of the embodiment 1; the preparation method of the high voltage resistant cable provided by the embodiment comprises the following steps:
(1) And extruding polyethylene outside the tin-plated copper conductor by a 70-type extruding machine to form an insulating layer, wherein the length-diameter ratio of a screw of the 70-type extruding machine is 15, and the working temperatures of a plurality of regions are respectively as follows: zone 1 at 160 deg.C, zone 2 at 170 deg.C, zone 3 at 180 deg.C, zone 4 at 190 deg.C, zone 5 at 190 deg.C, and head temperature at 195 deg.C to obtain core.
(2) And (3) performing pair twisting on the two wire cores obtained in the step (1) on a single twisting machine in a back-twist type pair twisting mode, wherein the twisting pitch is 40mm, and thus obtaining the cable core.
(3) Extruding polyethylene outside the cable core obtained in the step (2) by a 70-type extruding machine to form a total insulating layer, wherein the length-diameter ratio of a screw of the 70-type extruding machine is 15, and the working temperatures of a plurality of areas are respectively as follows: 160 ℃ in the region 1, 170 ℃ in the region 2, 180 ℃ in the region 3, 190 ℃ in the region 4, 190 ℃ in the region 5 and 195 ℃ in the head; adopt 16 spindle braiders to weave the tinned copper wire again and form the shielding layer, the angle of weaving is 50, and the density of weaving is 95%, and rethread 90 type extruding machines are at the outside crowded package polyvinyl chloride of shielding layer and form the oversheath, and 90 type extruding machines's screw rod draw ratio is 22, and the operating temperature in a plurality of districts is respectively: and the temperatures of the head and the die are 170 ℃ respectively in a region 1 of 140 ℃, a region 2 of 160 ℃, a region 3 of 170 ℃, and a region 4 of 170 ℃, so as to obtain the high-voltage-resistant cable.
Example 3
A high voltage resistant cable for large data transmission, which is different from example 1 only in that the thickness of the total insulation layer is 1.2mm, and other structures, parameters and preparation methods are the same as example 1.
Example 4
A high voltage resistant cable for large data transmission is different from the cable of example 1 only in that the thickness of the insulating layer is 0.5mm, and other structures, parameters and preparation methods are the same as those of example 1.
Example 5
A high voltage resistant cable for large data transmission, which is different from example 1 only in that the thickness of the polyamide layer is 0.2mm, and other structures, parameters and preparation methods are the same as example 1.
Example 6
A high voltage resistant cable for large data transmission is different from the cable of embodiment 1 only in that a copper conductor is used to replace a tin-plated copper conductor, and other structures, parameters and preparation methods are the same as those of embodiment 1.
Comparative example 1
The high-voltage-resistant cable for large data transmission is different from the high-voltage-resistant cable in example 1 in that a total insulating layer is not arranged, a shielding layer is directly coated outside a cable core, the thickness of the insulating layer is 2mm, and other structures, parameters and preparation methods are the same as those of example 1.
Comparative example 2
A high-voltage-resistant cable for large data transmission is different from the cable in example 2 in that a total insulating layer is not arranged, a shielding layer is directly coated outside a cable core, the thickness of the insulating layer is 2mm, and other structures, parameters and preparation methods are the same as those in example 2.
And (3) performance testing:
(1) Pressure resistance: all conductors at one end of the obtained high-voltage-resistant cable are connected in parallel, the other end of the high-voltage-resistant cable is separated, non-conduction among a plurality of wire cores is guaranteed, a high-voltage stage of the testing equipment is connected with a shielding layer of the cable, a low-voltage stage of the testing equipment is connected with the ends of the conductors which are connected in parallel, the testing voltage is slowly increased to 200V firstly, whether abnormity exists is checked, if abnormity exists, the testing voltage is continuously and gradually increased, the testing voltage is increased to 5kV for 1min, then is increased to 10kV for 1min, and finally is increased to 15kV for 1min, and the upper limit voltage when breakdown occurs is tested.
(2) Corrosion resistance: the test adopts a sodium chloride solution of a neutral salt spray test, the preparation method is a distilled water or deionized water solution of chemical pure sodium chloride with the concentration of 50 +/-10 g/L (the standard of the International Organization for Standardization, ISO) is (50 +/-5) g/L), the test condition is 25 ℃, the pH value is 6.5-7.2, a grid mark is carried out on a conductor, the conductor is placed in a test box with the constant temperature of 35 ℃ for continuous salt spray, and the time when the corrosion area of a sample reaches 5 percent is recorded.
(3) Transmission efficiency, etc.: one end of the cable is connected with a signal transmitting device, AND the other end of the cable is connected with a passive automatic receiver AND an AND grid for testing the attenuation degree of the signal;
(4) Rat resistance: SD rats (about 12 weeks old and 250-300 g in weight) are selected for testing, two sections of samples of about 300mm are prepared and hung in the middle of a test cage, 5 rats are placed in the cage, the test period is 14 days, normal feeding is carried out during the test period, whether gnawing traces exist on the cable or not is checked after the test is finished, if gnawing exists, the gnawing depth is qualified when being less than 1mm, and the gnawing depth is unqualified when being more than or equal to 1 mm.
The high voltage resistant cables provided in examples 1 to 6 and comparative examples 1 to 2 were tested according to the above test method, and the test results are shown in table 1:
TABLE 1
| Pressure resistance (kV) | Anti-corrosive performance (h) | Transmission efficiency (%) | Ratproof performance | |
| Example 1 | 16.6kV | ＞5000 | 99.7 | By passing |
| Example 2 | 16.4kV | ＞5000 | 99.8 | Failed to pass |
| Example 3 | 13.7kV | ＞5000 | 98.3 | By passing |
| Example 4 | 14.2kV | ＞5000 | 96.7 | By passing |
| Example 5 | 16.4kV | ＞5000 | 99.7 | Failed through |
| Example 6 | 16.8 | 55 | 87.2 | By passing |
| Comparative example 1 | 7.3 | ＞5000 | 92.6 | By passing |
| Comparative example 2 | 7.7 | ＞5000 | 93.5 | Failed through |
As can be seen from the data in table 1: the high-voltage-resistant cable has excellent high-voltage resistance, corrosion resistance and higher transmission efficiency, and the polyamide layer is arranged on the outermost side of the cable, so that the obtained cable has rat-proof performance; the cables obtained in the embodiments 1 to 6 have the voltage resistance of 13.7 to 16.8kV, the corrosion resistance test is more than 55h, and the transmission efficiency is 87.2 to 99.8 percent.
Comparing example 1 with comparative example 1, and example 2 with comparative example 2, it was found that the high voltage resistance of the cable obtained without providing the total insulation layer (comparative example 1, comparative example 2) was greatly lowered.
Comparing example 1 with examples 2 and 5, it can be seen that the rat-proof performance of the cable obtained without the polyamide layer (example 2) or with the polyamide layer having a low thickness (example 5) is poor, and the cable cannot be prevented from being bitten by rodents during use, and the safety and stability of data transmission cannot be ensured.
Comparing example 1 with examples 3 to 4, it was found that the cable obtained with a lower total insulation layer thickness (example 3) or with a lower insulation layer thickness (example 4) also had a lower voltage resistance.
Finally, a comparison of examples 1 and 6 shows that the corrosion resistance of the cable obtained by replacing the tin-plated copper conductor with a copper conductor is reduced.
Claims (10)
1. The utility model provides a high voltage resistant cable for big data transmission, includes two piece at least sinle silks, every sinle silk by the conductor with the cladding be in insulating layer outside the conductor constitutes, and per two sinle silks transposition forms the cable core, the cable core outside cladding has total insulating layer, shielding layer and oversheath in proper order.
2. The high voltage tolerant cable according to claim 1, wherein the conductor is a tin-plated copper conductor;
preferably, the tin-plated copper conductor is formed by stranding tin-plated copper wires;
preferably, the diameter of the tinned copper wire is 0.19-0.205 mm;
preferably, the tinned copper wire is obtained by tinning a copper wire.
3. The high voltage tolerant cable of claim 1 or 2 wherein the outer conductor insulation is polyethylene insulation;
preferably, the thickness of the polyethylene insulating layer is not less than 0.6mm;
preferably, the total insulation layer is a polyethylene total insulation layer;
preferably, the thickness of the total insulating layer is not less than 1.3mm.
4. The high voltage tolerant cable according to any one of claims 1 to 3, wherein the shielding layer is a tinned copper wire braided shielding layer;
preferably, the diameter of the tinned copper wire in the tinned copper wire braided shielding layer is 0.1-0.12 mm;
preferably, the outer sheath is a polyvinyl chloride outer sheath;
preferably, the outer sheath has a thickness of not less than 1.5mm.
5. The high voltage resistant cable according to any one of claims 1 to 4, wherein the outer sheath is coated with a polyamide layer;
preferably, the thickness of the polyamide layer is not less than 0.5mm.
6. A method for preparing the high voltage resistant cable for big data transmission according to any one of claims 1 to 5, comprising:
extruding an insulating layer material outside the conductor to obtain a wire core;
twisting every two wire cores in pairs to obtain a cable core;
and extruding a total insulation layer material on the outer side of the obtained cable core, weaving a shielding layer material, and finally extruding an outer sheath material to obtain the high-voltage-resistant cable.
7. The method of claim 6, wherein the extruding is performed by a type 70 extruder;
preferably, the screw length/diameter ratio of said type 70 extruder is from 12 to 20;
preferably, the multiple zones of said type 70 extruder are operated at respective temperatures of: 155-165 ℃ in the area 1, 165-175 ℃ in the area 2, 175-185 ℃ in the area 3, 185-195 ℃ in the area 4, 185-195 ℃ in the area 5 and 190-200 ℃ at the head temperature.
8. The production method according to claim 6 or 7, wherein the pair twisting is untwisted pair twisting;
preferably, the pair twisting is performed on a single twister;
preferably, the twisting pitch of the pair of wires is not more than 50mm.
9. The production method according to any one of claims 6 to 8, wherein the extruding of the total insulating layer material is performed by a type 70 extruder;
preferably, the screw length/diameter ratio of said type 70 extruder is from 12 to 20;
preferably, the multiple zones of said type 70 extruder are operated at respective temperatures of: 155-165 ℃ in the area 1, 165-175 ℃ in the area 2, 175-185 ℃ in the area 3, 185-195 ℃ in the area 4, 185-195 ℃ in the area 5 and 190-200 ℃ in the head temperature;
preferably, the braiding is performed by a 16 spindle braiding machine or a 24 spindle braiding machine;
preferably, the angle of the weave is 30 to 60 °;
preferably, the density of the weave is not less than 90%;
preferably, the extruding of the outer jacket material is performed by a type 90 extruder;
preferably, the operating temperatures of the zones of said type 90 extruder are: the temperature of the area 1 is 135-145 ℃, the temperature of the area 2 is 155-165 ℃, the temperature of the area 3 is 165-175 ℃, the temperature of the area 4 is 165-175 ℃, and the temperature of the machine head and the die are 165-175 ℃ respectively and independently;
preferably, after the extruding the outer sheath material, the method further comprises: extruding and wrapping polyamide;
preferably, the extrusion of the polyamide is carried out by means of a type 90 extruder;
preferably, the operating temperatures of the zones of said type 90 extruder are: zone 1 is 160-180 ℃, zone 2 is 190-210 ℃, zone 3 is 210-230 ℃, zone 4 is 210-230 ℃, and the head and the die are 230-250 ℃ respectively and independently.
10. Use of a high voltage tolerant cable for big data transmission according to any of claims 1-5 in a power transformation system.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2022/096235 WO2023230839A1 (en) | 2022-05-31 | 2022-05-31 | High-voltage resistant cable for big data transmission, preparation method therefor and use thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115151980A true CN115151980A (en) | 2022-10-04 |
Family
ID=83416363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280001799.9A Pending CN115151980A (en) | 2022-05-31 | 2022-05-31 | High-voltage-resistant cable for big data transmission and preparation method and application thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115151980A (en) |
| WO (1) | WO2023230839A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609180A (en) * | 2016-03-16 | 2016-05-25 | 苏珩线缆南通有限公司 | Ultralow-temperature instrument control cable and preparation method thereof |
| CN208111115U (en) * | 2018-03-16 | 2018-11-16 | 扬州市金阳光电缆有限公司 | A kind of urban track traffic high-performance active beacon cable |
| KR20200070788A (en) * | 2018-12-10 | 2020-06-18 | 넥쌍 | High-shielding light-weight cables including shielding layer of polymer-carbon composite |
| KR102181049B1 (en) * | 2019-02-19 | 2020-11-19 | 엘에스전선 주식회사 | Ethernet cable |
-
2022
- 2022-05-31 CN CN202280001799.9A patent/CN115151980A/en active Pending
- 2022-05-31 WO PCT/CN2022/096235 patent/WO2023230839A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023230839A1 (en) | 2023-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU185113U1 (en) | SYMMETRIC DATA CABLE | |
| RU169338U1 (en) | HIGH FREQUENCY SYMMETRIC HEAT RESISTANT CABLE | |
| KR102416896B1 (en) | Joint box | |
| CN109411116B (en) | High flame-retardant railway signal cable | |
| US9368258B2 (en) | Forward twisted profiled insulation for LAN cables | |
| CN108735384B (en) | Production method of low-voltage power cable | |
| CN202189578U (en) | Thin wall cable for railroad locomotive | |
| EP2432090A1 (en) | Cable with a split tube and method for making the same | |
| CN108417301B (en) | Medium-voltage water tree-resistant crosslinked polyethylene insulated power cable and production process thereof | |
| CN115151980A (en) | High-voltage-resistant cable for big data transmission and preparation method and application thereof | |
| CN104835576A (en) | Combined control cable and preparation method therefor | |
| CN112635121A (en) | Concentric optical fiber composite conductor cable and preparation process thereof | |
| CN103680693A (en) | Tensile cable and method for manufacturing same | |
| CN206595056U (en) | Novel cable | |
| KR20160088497A (en) | UTP cable | |
| RU151118U1 (en) | CABLE FOR ROLLING COMPOSITION OF RAIL TRANSPORT | |
| CN113096889A (en) | Method for manufacturing low-temperature-resistant long-service-life thin plastic insulated cable for motor train unit | |
| CN105609180A (en) | Ultralow-temperature instrument control cable and preparation method thereof | |
| CN112382431A (en) | Oil-resistant drag chain line and production process | |
| CN105244115A (en) | Braided shielding transponder data transmission cable with semi-conductive structure | |
| RU168097U1 (en) | CABLE FOR ROLLING COMPOSITION OF RAIL TRANSPORT | |
| RU2690160C1 (en) | Symmetric data transmission cable | |
| CN205621487U (en) | Cable for medical equipment | |
| CN219476339U (en) | Aluminum alloy photovoltaic special cable | |
| CN220065243U (en) | Oil-resistant corrosion-resistant environment-friendly power cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |