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CN110047622B - High-efficient waterproof power cable - Google Patents

High-efficient waterproof power cable Download PDF

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CN110047622B
CN110047622B CN201910435925.1A CN201910435925A CN110047622B CN 110047622 B CN110047622 B CN 110047622B CN 201910435925 A CN201910435925 A CN 201910435925A CN 110047622 B CN110047622 B CN 110047622B
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waterproof
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cable
waterproof layer
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CN110047622A (en
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不公告发明人
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HUNAN SANXIANG WIRE & CABLE Co.,Ltd.
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Hunan Sanxiang Wire & Cable Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • C08J3/243—Two or more independent types of crosslinking for one or more polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • 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
    • 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
    • H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)

Abstract

The invention relates to a high-efficiency waterproof power cable which sequentially comprises a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion, wherein a first waterproof layer is filled between the insulating layer and the copper strip, a second waterproof layer is filled between the copper strip and the armor layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1. according to the invention, through the design of a two-layer waterproof system, the waterproof performance of the cable is effectively improved, and the requirement of a new generation of cable on waterproof protection is met.

Description

High-efficient waterproof power cable
Technical Field
The invention relates to a high-efficiency waterproof power cable.
Background
In recent years, in an accident related to a cable power system, the rate of interruption of power supply to the power system due to fire or flooding of the power cable tends to increase. When external force causes damage to the cable sheath and the insulation or joint damage during the laying and operation of the cable, moisture or water can infiltrate along the longitudinal and radial gaps of the cable, so that the crosslinked polyethylene insulation generates water trees under the operation voltage. After a certain period of time, the water tree grows to a certain length, which can cause permanent electrical tree defects at the tip, and finally lead to cable insulation breakdown.
According to statistics, in a domestic power grid 10-35 KV power system, the underground directly-buried crosslinked polyethylene insulated cable does not adopt a water-blocking structure, so that water trees can appear after the cable runs for 8-12 years, breakdown accidents occur, and the safe running of the power grid is seriously influenced. Therefore, the use of the cable water-blocking structure has very important significance for ensuring the reliability and the service life of the crosslinked polyethylene cable.
Because the cable is manufactured through various processes, various water possibly can be generated on the surface of the metal shielding tape in the process: 1) the material contains moisture in the cable production process; 2) the heat-shrinkable cap is not well sealed after the cable is produced; 3) when the outer sheath is damaged or overvoltage occurs during the laying of the cable, the outer sheath breaks down; 4) when the cable intermediate joint or the terminal is manufactured, a heating blanket is not used for heating, straightening and dehumidifying in the manufacturing process, the cable accessory is not sealed well in the wrapping and sealing process, and moisture enters the joint part of the cable; 5) according to the electroosmosis phenomenon, most rainwater in China is acidic, the cable is soaked in water for a long time, the insulating material contains moisture, the moisture is positively charged under the action of an electric field, and when a positive test voltage is applied to the cable core, the moisture is repelled by the cable core and permeates to the metal shield; relatively little moisture in the insulation; when negative test voltage is applied to the cable core, moisture is attracted by the cable core, penetrates through the insulation and moves towards the cable core, and the moisture in a high field strength area in the insulation is relatively increased in the moving process. In a cable handover completion test and in normal operation of the cable, moisture migrates back and forth in the cable, causing corrosion of the metal shield; 6) when the cable is fully loaded, half-loaded, overhauled or the temperature difference between day and night is large, gas in the outer sheath is influenced by positive pressure and negative pressure, the gas in the cable sheath is in positive pressure when heated, the gas impacts the sealing part of the accessory, and moisture can be sucked into the cable sheath in negative pressure after cooling.
CN201710004836 discloses a thermoplastic rubber waterproof insulated cable, which comprises an outer sheath, wherein the outer sheath is coated with a nano material structure layer, the nano material structure layer is hermetically connected to the outer sheath and is coated with a waterproof material layer, the waterproof material layer is adhered to the nano material structure layer, a thermoplastic rubber insulating layer is arranged in the outer sheath, the thermoplastic rubber insulating layer is encapsulated on the waterproof material layer through thermoplasticity, a filling layer is arranged in the thermoplastic rubber insulating layer, and the filling layer is connected with the thermoplastic rubber insulating layer through a non-woven thread
CN201710235033 discloses an environment-friendly cable with waterproof and high-insulation properties, which comprises a main cable conductor and an extension cable conductor, wherein a soldering welding layer, a waterproof layer, an armor layer and a sealing layer are sequentially arranged outside a conductor connecting part; the fixed shell is sleeved on the main cable and the extension cable in a clearance fit manner and contains conductor connecting parts, the inner diameters of the connecting parts at two axial ends of the fixed shell are larger than the inner diameter of the middle section of the fixed shell in the axial direction, and internal threads are arranged on the inner wall of the connecting parts; the fixing device also comprises two pressing fixing pieces matched with the fixing shell sleeve, an elastic sealing piece is arranged on the inner wall of each pressing fixing piece, and external threads are arranged on the outer wall of each pressing fixing piece; the compressing and fixing pieces are respectively arranged at two axial ends of the fixed shell sleeve and respectively sleeved on the main cable and the extension cable, the compressing and fixing pieces are connected with the fixed shell sleeve through threads, and the elastic sealing piece is in transition fit contact with the main cable and the auxiliary cable. Effectively improve the steadiness and the insulated wire of cable extension junction, prevent the infiltration of moisture, ensure motor normal operating.
CN201710329137 provides a highly efficient waterproof power cable suitable for humid environments. The technical scheme is as follows: this power cable includes many insulation core, the outer cladding restrictive coating of insulation core, set up the median that absorbs water between many insulation core, evenly inlay along length direction on the power cable and establish a plurality of water collecting cap, water collecting cap is including inhaling portion and waterproof cover by force, waterproof cover is outer end confined tubulose. The inner of waterproof jacket inserts the restrictive coating and offsets with the median that absorbs water, inhale the portion by force and be located the inner port department of waterproof jacket, and inhale the external diameter of portion by force and the internal diameter of waterproof jacket unanimous, the hydroscopicity of inhaling the portion by force is stronger than the median that absorbs water. The waterproof effect of the power cable can be greatly improved, the moisture permeated in the cable is reduced, and the service life of the cable is prolonged.
CN201710349154 discloses an inorganic mineral insulating metal sheath fireproof and waterproof cable, which comprises a cable core, wherein the cable core is formed by twisting a plurality of fan-shaped wire cores; the fan-shaped wire core is composed of a fan-shaped copper conductor and a fan-shaped inorganic mineral insulating layer extruded outside the fan-shaped copper conductor; filling ointment in the gaps of the cable core; the cable core is externally provided with a ceramic silicon rubber wrapping tape, the ceramic silicon rubber wrapping tape is externally provided with a corrugated metal sheath, and the corrugated metal sheath is externally provided with a polyisobutylene waterproof film. The cable has the advantages of excellent fireproof performance, good waterproof effect, good overall flexibility of the cable, safety, environmental protection, good corrosion resistance, convenience in installation, simplicity in manufacturing and the like.
CN201710217427 provides a wear-resistant and waterproof communication network cable, which comprises a flame retardant layer, a shielding layer and a protective layer composed of a wear-resistant layer, wherein a water-resistant layer is arranged outside a core of the power cable and a core of the optical fiber cable. The invention improves the traditional cable structure, integrates the power cable and the optical fiber cable into a whole, realizes the first-line dual function, reduces the manufacturing cost respectively, can be finished by one-time construction and laying, and saves labor force and construction cost. The waterproof layers arranged outside the core of the power cable and the core of the optical fiber cable have very high anti-seepage strength and anti-seepage pressure, and the formula of the wear-resistant layer material is also adjusted, so that the prepared cable has better wear resistance.
CN201410534444 discloses a waterproof and fireproof insulated cable. The cable comprises at least one conductor, wherein a first insulating layer is coated outside the conductor, one or more conductors coated with the first insulating layer are coated in a ceramic short fiber layer, magnesium oxide mineral insulating powder is arranged between the first insulating layer and between the first insulating layer and the ceramic short fiber layer, and a copper sheath, a second insulating layer, a moisture-proof waterproof layer and a fireproof layer are sequentially coated outside the ceramic short fiber layer; the invention adopts double-layer insulation, greatly improves the insulation performance of the cable, and is additionally provided with a moisture-proof waterproof layer and a fireproof layer, thereby greatly improving the safety performance of the cable.
However, the waterproof performance of the waterproof cable cannot meet the increasingly severe service environment, such as submarine cables.
Disclosure of Invention
In order to solve the following problems in the prior art: that is, the waterproof performance of the waterproof cable in the prior art still cannot meet increasingly harsh use environments, such as submarine cables and the like.
The invention provides the following technical scheme:
the high-efficiency waterproof power cable sequentially comprises a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion.
The copper strip and the armor layer are filled with a second waterproof layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1.
the waterproof paint comprises a first waterproof layer, a second waterproof layer and a waterproof layer, wherein the first waterproof layer and the second waterproof layer are prepared from the following raw materials in percentage by weight: 60-70 parts of polypropylene ethylene, 40-50 parts of ethyl acetate, 5-10 parts of thixotropic agent, 40-50 parts of water-absorbent resin powder, 5-10 parts of stabilizer, 3-7 parts of cross-linking agent I and 3-7 parts of cross-linking agent II;
wherein the crosslinking agent I is a compound with the following structural formula:
Figure BDA0002070507840000041
the cross-linking agent II is prepared by adopting the following method:
s1, adding chromium chloride into a reaction vessel, adding water to dissolve, and heating to 50 ℃;
s2, adding sodium oxalate into the reaction container, controlling the adding speed of the sodium oxalate, adding the sodium oxalate again after the added white solid is dissolved to avoid coagulation, and preserving heat for 30min after the sodium acetate is added to obtain a crosslinking agent II;
wherein the molar ratio of the chromium ions to the oxalate in the cross-linking agent II is 1: 2.
wherein the thixotropic agent is polyamide wax, and the stabilizing agent is isooctyl dimercaptoacetate di-n-octyl tin.
The technical scheme of the invention has the following beneficial effects:
on the basis of the prior art, the waterproof performance and the stability of the cable are greatly improved by introducing the composite cross-linking agent, and the composite cross-linking agent can connect linear high molecular substances with new chemical bonds to form a three-dimensional network structure, so that the internal structure of the waterproof layer material is improved, and the waterproof effect and the stability of the waterproof layer material are improved. In addition, the crosslinking agent structure formed by complexing organic chromium and a ligand in the composite crosslinking agent has higher stability, so that the amount of chromium ions released to participate in the reaction is less, and the crosslinking effect is more obvious. Because the crosslinking mechanisms and the generated crosslinking effects of different crosslinking agents are different, the invention can synergistically exert the action effect of the crosslinking agents by introducing two different crosslinking agents and utilizing different action mechanisms and different advantages of the two different crosslinking agents, synergistically improve the internal structure of the waterproof layer material and greatly improve the waterproof effect and the stability of the waterproof layer material. After the cable is placed in water with the depth of 100m (the water pressure is 9.8 multiplied by 105Pa) for 3 months, the error delta of the signal transmission rate of the cable is only 0.1 percent.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following examples and comparative examples.
Example 1
The high-efficiency waterproof power cable sequentially comprises a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion.
The copper strip and the armor layer are filled with a second waterproof layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1.
the waterproof paint comprises a first waterproof layer, a second waterproof layer and a waterproof layer, wherein the first waterproof layer and the second waterproof layer are prepared from the following raw materials in percentage by weight: 60 parts of polypropylene ethylene, 40 parts of ethyl acetate, 5 parts of thixotropic agent, 40 parts of water-absorbent resin powder, 5 parts of stabilizer, 3 parts of cross-linking agent I and 3 parts of cross-linking agent II;
wherein the crosslinking agent I is a compound with the following structural formula:
Figure BDA0002070507840000051
the cross-linking agent II is prepared by adopting the following method:
s1, adding chromium chloride into a reaction vessel, adding water to dissolve, and heating to 50 ℃;
s2, adding sodium oxalate into the reaction container, controlling the adding speed of the sodium oxalate, adding the sodium oxalate again after the added white solid is dissolved to avoid coagulation, and preserving heat for 30min after the sodium acetate is added to obtain a crosslinking agent II;
wherein the molar ratio of the chromium ions to the oxalate in the cross-linking agent II is 1: 2.
wherein the thixotropic agent is polyamide wax, and the stabilizing agent is isooctyl dimercaptoacetate di-n-octyl tin.
Example 2
The high-efficiency waterproof power cable sequentially comprises a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion.
The copper strip and the armor layer are filled with a second waterproof layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1.
the waterproof paint comprises a first waterproof layer, a second waterproof layer and a waterproof layer, wherein the first waterproof layer and the second waterproof layer are prepared from the following raw materials in percentage by weight: 65 parts of polypropylene ethylene, 45 parts of ethyl acetate, 8 parts of thixotropic agent, 45 parts of water-absorbent resin powder, 8 parts of stabilizer, 5 parts of cross-linking agent I and 5 parts of cross-linking agent II;
wherein the crosslinking agent I is a compound with the following structural formula:
Figure BDA0002070507840000061
the cross-linking agent II is prepared by adopting the following method:
s1, adding chromium chloride into a reaction vessel, adding water to dissolve, and heating to 50 ℃;
s2, adding sodium oxalate into the reaction container, controlling the adding speed of the sodium oxalate, adding the sodium oxalate again after the added white solid is dissolved to avoid coagulation, and preserving heat for 30min after the sodium acetate is added to obtain a crosslinking agent II;
wherein the molar ratio of the chromium ions to the oxalate in the cross-linking agent II is 1: 2.
wherein the thixotropic agent is polyamide wax, and the stabilizing agent is isooctyl dimercaptoacetate di-n-octyl tin.
Example 3
The high-efficiency waterproof power cable sequentially comprises a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion.
The copper strip and the armor layer are filled with a second waterproof layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1.
the waterproof paint comprises a first waterproof layer, a second waterproof layer and a waterproof layer, wherein the first waterproof layer and the second waterproof layer are prepared from the following raw materials in percentage by weight: 70 parts of polypropylene ethylene, 50 parts of ethyl acetate, 10 parts of thixotropic agent, 50 parts of water-absorbent resin powder, 10 parts of stabilizer, 7 parts of cross-linking agent I and 7 parts of cross-linking agent II;
wherein the crosslinking agent I is a compound with the following structural formula:
Figure BDA0002070507840000062
the cross-linking agent II is prepared by adopting the following method:
s1, adding chromium chloride into a reaction vessel, adding water to dissolve, and heating to 50 ℃;
s2, adding sodium oxalate into the reaction container, controlling the adding speed of the sodium oxalate, adding the sodium oxalate again after the added white solid is dissolved to avoid coagulation, and preserving heat for 30min after the sodium acetate is added to obtain a crosslinking agent II;
wherein the molar ratio of the chromium ions to the oxalate in the cross-linking agent II is 1: 2.
wherein the thixotropic agent is polyamide wax, and the stabilizing agent is isooctyl dimercaptoacetate di-n-octyl tin.
Comparative example 1
The high-efficiency waterproof power cable sequentially comprises a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion.
The copper strip and the armor layer are filled with a second waterproof layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1.
the waterproof paint comprises a first waterproof layer, a second waterproof layer and a waterproof layer, wherein the first waterproof layer and the second waterproof layer are prepared from the following raw materials in percentage by weight: 65 parts of polypropylene ethylene, 45 parts of ethyl acetate, 8 parts of thixotropic agent, 45 parts of water-absorbent resin powder, 8 parts of stabilizer and 10 parts of cross-linking agent I.
Wherein the crosslinking agent I is a compound with the following structural formula:
Figure BDA0002070507840000071
wherein the thixotropic agent is polyamide wax, and the stabilizing agent is isooctyl dimercaptoacetate di-n-octyl tin.
Comparative example 2
The high-efficiency waterproof power cable sequentially comprises a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion.
The copper strip and the armor layer are filled with a second waterproof layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1.
the waterproof paint comprises a first waterproof layer, a second waterproof layer and a waterproof layer, wherein the first waterproof layer and the second waterproof layer are prepared from the following raw materials in percentage by weight: 65 parts of polypropylene ethylene, 45 parts of ethyl acetate, 8 parts of thixotropic agent, 45 parts of water-absorbent resin powder, 8 parts of stabilizer and 10 parts of crosslinking agent II.
The cross-linking agent II is prepared by adopting the following method:
s1, adding chromium chloride into a reaction vessel, adding water to dissolve, and heating to 50 ℃;
s2, adding sodium oxalate into the reaction container, controlling the adding speed of the sodium oxalate, adding the sodium oxalate again after the added white solid is dissolved to avoid coagulation, and preserving heat for 30min after the sodium acetate is added to obtain a crosslinking agent II;
wherein the molar ratio of the chromium ions to the oxalate in the cross-linking agent II is 1: 2.
wherein the thixotropic agent is polyamide wax, and the stabilizing agent is isooctyl dimercaptoacetate di-n-octyl tin.
Comparative example 3
The high-efficiency waterproof power cable sequentially comprises a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion.
The copper strip and the armor layer are filled with a second waterproof layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1.
the waterproof paint comprises a first waterproof layer, a second waterproof layer and a waterproof layer, wherein the first waterproof layer and the second waterproof layer are prepared from the following raw materials in percentage by weight: 65 parts of polypropylene ethylene, 45 parts of ethyl acetate, 8 parts of thixotropic agent, 45 parts of water-absorbent resin powder and 8 parts of stabilizer.
Wherein the thixotropic agent is polyamide wax, and the stabilizing agent is isooctyl dimercaptoacetate di-n-octyl tin.
And (3) effect characterization:
(1) the compressive strength (sigma) of the cable was measuredbc/MPa)。
(2) The cables of example 2 and comparative examples 1 to 3 were placed in water of 100m depth (water pressure 9.8X 105Pa) for 3 months, and then the error DELTA in the signal transmission rate of the placed cables was examined.
Δ ═ [ (transmission rate 1-transmission rate 2)/transmission rate 1] × 100%
Wherein, the transmission speed 1 is the transmission speed before the cable is placed in the water, and the transmission speed 2 is the transmission speed after the cable is placed in the water for 3 months.
The results obtained are shown in the following table:
numbering Crosslinking agent σbc △
Example 2 Crosslinking agent I + crosslinking agent II 7.9MPa 0.1％
Comparative example 1 Crosslinking agents I 6.9MPa 0.7％
Comparative example 2 Crosslinking agent II 6.3MPa 1.1％
Comparative example 3 —— 5.7MPa 1.5％
The results show that on the basis of the prior art, the waterproof performance and the stability of the cable are greatly improved by introducing the composite cross-linking agent, because the linear high molecular substances can be connected by new chemical bonds by the composite cross-linking agent to form a three-dimensional network structure, the internal structure of the waterproof layer material can be improved by the three-dimensional network structure, and the waterproof effect and the stability of the waterproof layer material are improved. In addition, the crosslinking agent structure formed by complexing organic chromium in the composite crosslinking agent has higher stability, so that the amount of chromium ions released to participate in the reaction is less, and the crosslinking effect is more obvious. Furthermore, due to different crosslinking effects generated by different crosslinking agents, the invention can synergistically exert the effect of the crosslinking agent by introducing two different crosslinking agents and utilizing different action mechanisms and different advantages of the two different crosslinking agents, thereby improving the internal structure of the waterproof layer material and improving the waterproof effect and stability of the waterproof layer material. After the cable is placed in water with the depth of 100m (the water pressure is 9.8 multiplied by 105Pa) for 3 months, the error delta of the signal transmission rate of the cable is only 0.1 percent.

Claims (1)

1. The efficient waterproof power cable is characterized by comprising a core body, an insulating layer, a copper strip, an armor layer and an outer protective layer from inside to outside in sequence, wherein a hydrogen absorption filler is filled in the core body, and the hydrogen absorption filler is prepared from the following raw materials in percentage by weight: 4 parts of poly-alpha-olefin oil, 2 parts of molecular sieve and 1 part of styrene-butadiene rubber emulsion;
the copper strip waterproof structure is characterized in that a first waterproof layer is filled between the insulating layer and the copper strip, a second waterproof layer is filled between the copper strip and the armor layer, and the thickness ratio of the first waterproof layer to the second waterproof layer is 1: 1;
the first waterproof layer and the second waterproof layer are prepared from the following raw materials in percentage by weight: 60-70 parts of polypropylene ethylene, 40-50 parts of ethyl acetate, 5-10 parts of thixotropic agent, 40-50 parts of water-absorbent resin powder, 5-10 parts of stabilizer, 3-7 parts of cross-linking agent I and 3-7 parts of cross-linking agent II;
the cross-linking agent I is a compound with the following structural formula:
Figure DEST_PATH_IMAGE001
；
the cross-linking agent II is prepared by adopting the following method:
s1, adding chromium chloride into a reaction vessel, adding water to dissolve, and heating to 50 ℃;
s2, adding sodium oxalate into the reaction container, controlling the adding speed of the sodium oxalate, adding the sodium oxalate again after the added white solid is dissolved to avoid condensation, and preserving heat for 30min after the sodium oxalate is added to obtain a crosslinking agent II;
the molar ratio of the chromium ions to the oxalate in the cross-linking agent II is 1: 2;
the thixotropic agent is polyamide wax, and the stabilizing agent is isooctyl dimercaptoacetate di-n-octyl tin.
CN201910435925.1A 2019-05-23 2019-05-23 High-efficient waterproof power cable Active CN110047622B (en)

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RU226414U1 (en) * 2024-03-25 2024-06-04 Общество с ограниченной ответственностью "Камский кабель" Explosion-proof cable with sealed core

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CN103304857B (en) * 2012-03-16 2015-08-26 比亚迪股份有限公司 A kind of preparation method of modified butadiene acrylonitrile rubber and modified butadiene acrylonitrile rubber
CN104319000B (en) * 2014-10-11 2016-08-31 国家电网公司 A kind of waterproof fireproofing insulated cable
JP2019507235A (en) * 2016-01-29 2019-03-14 スキンプロテクト コーポレイション スンディリアン ブルハド Elastomeric articles, compositions, and methods of making them
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