CN117038180A - Waterproof photovoltaic cable for shoal - Google Patents
Waterproof photovoltaic cable for shoal Download PDFInfo
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- CN117038180A CN117038180A CN202311010825.7A CN202311010825A CN117038180A CN 117038180 A CN117038180 A CN 117038180A CN 202311010825 A CN202311010825 A CN 202311010825A CN 117038180 A CN117038180 A CN 117038180A
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Classifications
-
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
-
- 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
- H01B9/00—Power cables
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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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)
Abstract
The application relates to the field of photovoltaic power transmission systems, and particularly discloses a waterproof photovoltaic cable for a shoal. The waterproof photovoltaic cable for the shoal comprises a cable body, wherein the cable body comprises a conductor inner core, an insulating layer is sleeved on the conductor inner core, and a waterproof sheath is sleeved on the insulating layer; the sheath material is prepared from the following raw materials in parts by weight: 80-100 parts of high-density polyethylene, 37-45 parts of waterproof modifier, 3-5 parts of zinc stearate, 3-5 parts of calcium stearate and 0.5-1.5 parts of ultraviolet absorber; the waterproof modifier comprises ethylene propylene diene monomer, a reinforcing agent and a compatilizer, wherein the weight ratio of the ethylene propylene diene monomer to the reinforcing agent to the interfacial stabilizer is 20-25:15:2-5. The photovoltaic cable can be used for power transmission of a photovoltaic system in a shoal area, can effectively resist water erosion and reduces occurrence of short circuit.
Description
Technical Field
The application relates to the field of photovoltaic power generation systems, in particular to a waterproof photovoltaic cable for a shoal.
Background
The photovoltaic power generation is a clean, environment-friendly, green and safe renewable energy source, and compared with a plurality of conventional power generation modes, the photovoltaic power generation method has the obvious advantages that a large amount of land is not required to be occupied by a large photovoltaic point. As a key transmission component of a photovoltaic power generation system, a photovoltaic cable plays a critical role in the utilization of solar energy.
The photovoltaic cable structure sequentially comprises a conductor inner core from inside to outside, an insulating layer sleeved on the conductor inner core, and a sheath sleeved outside the insulating layer.
When the photovoltaic cable is used in a shoal, the photovoltaic cable is easily tripped due to the erosion of water flow when being soaked in water for a long time, so that the power transmission is influenced.
Disclosure of Invention
In order to improve the waterproof performance of a photovoltaic cable, so that the photovoltaic cable is suitable for being used in places such as a shoal, the application provides the waterproof photovoltaic cable for the shoal, which adopts the following technical scheme:
the utility model provides a waterproof photovoltaic cable for shoal, includes the cable body, the cable body includes the conductor inner core, the cover is equipped with the insulating layer on the conductor inner core, the cover is equipped with waterproof sheath on the insulating layer.
Through adopting above-mentioned technical scheme, conductor inner core, insulating layer and waterproof sheath three constitution cable body, be in the waterproof performance of outer waterproof sheath effective improvement photovoltaic cable to when photovoltaic cable was used for areas such as shoal, the photovoltaic cable can effectively resist rivers erosion, reduces the adverse effect of water to photovoltaic cable, and then reduces the appearance of situations such as photovoltaic cable short circuit.
Preferably, the cable bodies are arranged in two groups, and the outermost layers of the waterproof jackets of the two groups of cable bodies are fixedly connected.
By adopting the technical scheme, under the condition that the conductor inner cores have the same sectional area from the current perspective, the current of the double-core photovoltaic cable is larger than that of the single-core photovoltaic cable, and the load capacity is higher; from the installation perspective, under the same sectional area condition, the double-core photovoltaic cable is softer than single-core photovoltaic cable, and the wiring is easier.
Preferably, the waterproof sheath comprises a waterproof layer sleeved on the insulating layer and an outer sheath sleeved on the waterproof layer.
Through adopting above-mentioned technical scheme, use the oversheath to protect the waterproof layer at outermost to reduce wearing and tearing or the rivers impact erosion that the waterproof layer received, effectively prolong the life of waterproof layer.
Preferably, the waterproof layer is a nonmetallic waterproof layer or a metallic waterproof layer.
Through adopting above-mentioned technical scheme, select the used material of waterproof layer, select suitable material to make the waterproof layer to effectively improve the waterproof performance of photovoltaic cable, reduce the condition that leads to photovoltaic cable short circuit because of the water erosion, and then reduce the adverse effect to transmission of electricity work.
Preferably, the waterproof layer comprises a nonmetal waterproof layer sleeved on the insulating layer, and a metal waterproof layer is sleeved on the nonmetal waterproof layer.
Through adopting above-mentioned technical scheme, the waterproof performance of photovoltaic cable can effectively be improved to two-layer waterproof layer, and effectively improves photovoltaic cable intensity, extension photovoltaic cable life.
Preferably, the waterproof sheath is made of a sheath material, and the sheath material is prepared from the following raw materials in parts by weight: 80-100 parts of high-density polyethylene, 37-45 parts of waterproof modifier, 3-5 parts of zinc stearate, 3-5 parts of calcium stearate and 0.5-1.5 parts of ultraviolet absorber; the waterproof modifier comprises ethylene propylene diene monomer, a reinforcing agent and a compatilizer, wherein the weight ratio of the ethylene propylene diene monomer to the reinforcing agent to the interfacial stabilizer is 20-25:15:2-5.
By adopting the technical scheme, because the high-density polyethylene has regular molecular main chain arrangement, small number of branched chains and high crystallinity, the dimensional change is greatly influenced by temperature, the waterproof modifier is blended with the high-density polyethylene, the ethylene propylene diene monomer and the filler are combined with the high-density polyethylene, the interface stabilizer improves the stability of the ethylene propylene diene monomer and the filler in the system, the ethylene propylene diene monomer and the filler improve the dimensional stability of the high-density polyethylene, and meanwhile, the filler reduces the adverse effect on the tensile strength of the high-density polyethylene due to the addition of the ethylene propylene diene monomer, thereby improving the waterproof performance of the high-density polyethylene.
Preferably, the reinforcing agent comprises a filler and a toughening agent, the weight ratio of the filler to the toughening agent being 2:1.
By adopting the technical scheme, the filler and the toughening agent are added into the mixture, so that adverse effect of the addition of the ethylene propylene diene monomer on the tensile strength of the high-density polyethylene is reduced, and meanwhile, the impact strength of the sheath material is improved, so that the waterproof performance of the high-density polyethylene is improved, meanwhile, the high-density polyethylene maintains certain tensile strength and impact strength, and the damage in the use process is reduced, so that the service life is prolonged.
Preferably, the filler is a nano mesoporous molecular sieve, and the toughening agent is polyether polyol.
By adopting the technical scheme, the tensile strength and the impact strength of the sheath material are improved by combining the nanoscale mesoporous molecular sieve and the polyether polyol, firstly, the structure of the sheath material is tighter by adding the nanoscale mesoporous molecular sieve, the strength reduction caused by ethylene propylene diene monomer is compensated, meanwhile, the water resistance of the sheath material is further improved by adding the nanoscale mesoporous molecular sieve, the impact resistance of the sheath material is improved by adding the polyether polyol molecular chain, and meanwhile, the crystallinity is improved under the promotion effect of the nanoscale mesoporous molecular sieve because the polyether polyol molecular chain is combined with the nanoscale mesoporous molecular sieve, the strength reduction caused by the ethylene propylene diene monomer is further compensated, and the strength of the sheath material is effectively improved.
Preferably, the interfacial stabilizer is a hydrophobic corn fiber gum.
By adopting the technical scheme, the corn fiber gum after being added with the hydrophobic modification improves the bonding strength of each component on one hand, so that the structure is tighter, and on the other hand, the corn fiber gum positioned on the surface layer effectively improves the hydrophobic performance of the sheath material, so that the waterproof performance of the sheath material is further improved.
Preferably, the sheath material is prepared by the following steps: and (3) blending the high-density polyethylene, the ethylene propylene diene monomer, the filler and the interface stabilizer, pre-drying, and carrying out melt extrusion granulation on the dried mixture to obtain the sheath material.
Through adopting above-mentioned technical scheme, the raw materials after the blending is dried first, and master batch is prepared to the mixture after the drying, then is used for the injection molding of sheath material to make the waterproof performance of sheath material who makes show to promote, thereby reduce the condition that photovoltaic cable receives the water erosion short circuit.
In summary, the application has the following beneficial effects:
1. according to the application, the hydrophobically modified corn fiber gum is used as an interface stabilizer, so that the bonding strength of raw materials such as high-density polyethylene, ethylene propylene diene monomer rubber and a filler is improved, the waterproof performance of the high-strength polyethylene is improved by the ethylene propylene diene monomer rubber, the strength reduction caused by the ethylene propylene diene monomer rubber is compensated by the filler, and meanwhile, the waterproof performance of the sheath material is further improved by the hydrophobically modified corn fiber gum on the surface layer.
2. According to the application, the tensile strength and the impact strength of the sheath material are preferably improved by combining the nano mesoporous molecular sieve and the polyether polyol, firstly, the nano mesoporous molecular sieve is added to enable the structure of the sheath material to be more compact, the strength reduction caused by ethylene propylene diene monomer is compensated, meanwhile, the nano mesoporous molecular sieve enables the water resistance of the sheath material to be further improved, the polyether polyol molecular chain is added to enable the impact resistance of the sheath material to be improved, meanwhile, the crystallinity is improved under the promotion effect of the nano mesoporous molecular sieve due to the combination with the nano mesoporous molecular sieve, the strength reduction caused by ethylene propylene diene monomer is further compensated, and the strength of the sheath material is effectively improved.
3. According to the application, the waterproof performance of the photovoltaic cable can be improved by adopting a plurality of layer structures, so that when the photovoltaic cable is used in environments such as a shoal, the condition of short circuit of the photovoltaic cable caused by water erosion is effectively reduced, and the adverse effect on a photovoltaic power transmission system is further reduced.
Drawings
FIG. 1 is a cross-sectional view of a photovoltaic cable of example 6;
FIG. 2 is a cross-sectional view of the photovoltaic cable of example 7;
FIG. 3 is a cross-sectional view of the photovoltaic cable of example 8;
FIG. 4 is a cross-sectional view of the photovoltaic cable of example 9;
FIG. 5 is a cross-sectional view of the photovoltaic cable of example 10;
FIG. 6 is a cross-sectional view of the photovoltaic cable of example 11;
FIG. 7 is a cross-sectional view of the photovoltaic cable of example 12;
fig. 8 is a cross-sectional view of the photovoltaic cable of example 13.
Reference numerals illustrate: 1. a cable body; 2. a conductor core; 3. an insulating layer; 4. a waterproof jacket; 5. a non-metallic waterproof layer; 6. a metal waterproof layer; 7. an outer sheath.
Detailed Description
The high-density polyethylene is HDPE master batch, and the product number is DGDA3485; the ethylene propylene diene monomer is an EPDM injection molding master batch with the brand of 3092PM; the mesh number of the zinc stearate is 1000 meshes; the mesh number of the calcium stearate is 1000 meshes; the ultraviolet absorber is UV-531; the type of the nano mesoporous molecular sieve is ZSM-5, and the silicon-aluminum ratio is 31.4; the polyether polyol is polytetramethylene ether glycol.
The application is described in further detail below with reference to the drawings and examples.
Preparation example
The preparation example discloses a hydrophobic corn fiber gum, which is prepared by the following steps:
s1, extracting corn fiber gum: sieving corn bran with a 40-mesh sieve, weighing 160g, adding 10 times of n-hexane (containing 0.01% BHT), stirring at room temperature for 2h, suction filtering, and air drying; adding 10 times volume of distilled water, heating in boiling water bath for 10min, regulating pH to 6.5 with 1M NaOH solution, adding 0.64g amylase, stirring at 70deg.C for 2 hr in water bath, checking iodine solution to be not blue, centrifuging for 10min, removing supernatant, oven drying the obtained solid for 12 hr at 60deg.C; the crude sample obtained was dissolved in 10 volumes of distilled water and 6g NaOH and 5.7g Ca (OH) were added 2 Stirring in boiling water bath for 1 hr, centrifuging, separating supernatant and solid, and lyophilizing the solid to obtain corn fiber gel.
S2, weighing 15g of corn fiber glue, adding 4815 g of 20wt% NaOH, and stirring for 30min at room temperature. Then, water bath is carried out at 40 ℃ and stirring is carried out for 5 hours, 2 times of volume of ethanol is added and stirring is carried out for 1 minute, standing is carried out at room temperature for 2 hours, supernatant is poured off, yellow viscous liquid is collected, then, the yellow viscous liquid is dissolved in proper distilled water, dialysis is carried out in deionized water for 5 days, and dialysis water is replaced for 2 times per day. And freeze-drying the dialyzed sample to obtain the hydrophobic corn fiber gum.
Examples
Example 1
The embodiment discloses a photovoltaic cable sheath material, which is prepared by the following steps:
80kg of high-density polyethylene, 20kg of ethylene propylene diene monomer rubber, 3kg of zinc stearate, 3kg of calcium stearate, 0.5kg of ultraviolet absorber, 10kg of nano mesoporous molecular sieve, 5kg of polyether polyol and 2kg of hydrophobic corn fiber gum prepared in the preparation example are mixed, dried for 12 hours at 100 ℃, then added into a double screw extruder for melt blending, and extruded to prepare the sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of the machine head is 220 ℃, the temperature of the melt temperature is 220 ℃, the screw speed of a host machine is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Example 2
The embodiment discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 22.5kg of ethylene propylene diene monomer rubber, 4kg of zinc stearate, 4kg of calcium stearate, 1kg of ultraviolet absorber, 10kg of nano mesoporous molecular sieve, 5kg of polyether polyol and 3.5kg of hydrophobic corn fiber gum prepared in the preparation example are mixed, dried for 12 hours at 100 ℃, then added into a double screw extruder for melt blending, and extruded to obtain sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of a machine head is 220 ℃, the temperature of the melt temperature is 220 ℃, the screw speed of a host machine is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Example 3
The embodiment discloses a photovoltaic cable sheath material, which is prepared by the following steps:
100kg of high-density polyethylene, 25kg of ethylene propylene diene monomer, 5kg of zinc stearate, 5kg of calcium stearate, 1.5kg of ultraviolet absorber, 10kg of nano mesoporous molecular sieve, 5kg of polyether polyol and 5kg of hydrophobic corn fiber gum prepared in the preparation example are mixed, dried for 12 hours at 100 ℃, then added into a double screw extruder for melt blending, and extruded to prepare the sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of the machine head is 220 ℃, the temperature of the melt temperature is 220 ℃, the rotational speed of a host screw is 150rpm, and the rotational speed of a feeding screw is 12rpm.
Example 4
The embodiment discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 22.5kg of ethylene propylene diene monomer rubber, 4kg of zinc stearate, 4kg of calcium stearate, 1kg of ultraviolet absorber, 15kg of polyether polyol and 3.5kg of hydrophobic corn fiber gum prepared in the preparation example are mixed, dried for 12 hours at 100 ℃, then added into a double screw extruder for melt blending, and extrusion is carried out to obtain the sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of the machine head is 220 ℃, the temperature of the melt is 220 ℃, the screw speed of a host machine is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Example 5
The embodiment discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 22.5kg of ethylene propylene diene monomer rubber, 4kg of zinc stearate, 4kg of calcium stearate, 1kg of ultraviolet absorber, 15kg of nano mesoporous molecular sieve and 3.5kg of hydrophobic corn fiber gum prepared in the preparation example are mixed, dried for 12 hours at 100 ℃, then added into a double screw extruder for melt blending, and extrusion is carried out to obtain sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of the machine head is 220 ℃, the temperature of the melt temperature is 220 ℃, the screw speed of a host machine is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Example 6
The embodiment discloses photovoltaic cable, refer to fig. 1, including cable body 1, cable body 1 includes conductor inner core 2, and the cover is equipped with insulating layer 3 on the conductor inner core 2, and insulating layer 3 outside cover is equipped with waterproof sheath 4.
In the embodiment, the material of the conductor inner core 2 is copper, the material of the insulating layer 3 is irradiation crosslinking polyolefin cable material, and the material of the waterproof sheath 4 is the photovoltaic cable sheath material prepared in the embodiment 2.
The implementation principle of the photovoltaic cable of the embodiment is as follows: the waterproof performance brought by the waterproof sheath 4 is used for resisting water erosion, so that the condition that water permeates into the photovoltaic cable to cause short circuit is reduced.
Example 7
The embodiment discloses a photovoltaic cable, refer to fig. 2, including cable body 1, cable body 1 includes conductor inner core 2, and the cover is equipped with insulating layer 3 on the conductor inner core 2, and insulating layer 3 outer cover is equipped with waterproof sheath 4. The waterproof sheath 4 comprises a nonmetallic waterproof layer 5 sleeved on the insulating layer 3, and an outer sheath 7 is sleeved on the nonmetallic waterproof layer 5.
In this embodiment, the material of the conductor inner core 2 is copper, the material of the insulating layer 3 is irradiation crosslinked polyolefin cable material, the material of the nonmetal waterproof layer 5 is nylon, the material of the outer sheath 7 is polyvinyl chloride, and in other embodiments, polyurethane or crosslinked polyolefin can be used.
The implementation principle of the photovoltaic cable of the embodiment is as follows: the outer sheath 7 is used as an outermost protective layer, and the nonmetal waterproof layer 5 effectively reduces water penetrating into the photovoltaic cable, so that the condition that the photovoltaic cable is short-circuited due to water penetration is reduced.
Example 8
The embodiment discloses a photovoltaic cable, refer to fig. 3, including cable body 1, cable body 1 includes conductor inner core 2, and the cover is equipped with insulating layer 3 on the conductor inner core 2, and insulating layer 3 outer cover is equipped with waterproof sheath 4. The waterproof sheath 4 comprises a metal waterproof layer 6 sleeved on the insulating layer 3, and an outer sheath 7 is sleeved on the metal waterproof layer 6.
In this embodiment, the material of the conductor inner core 2 is copper, the material of the insulating layer 3 is irradiation crosslinked polyolefin cable material, the metal waterproof layer 6 is formed by longitudinally wrapping a steel-plastic composite tape, the material of the outer sheath 7 is polyvinyl chloride, and in other embodiments, polyurethane or crosslinked polyolefin can be used.
The implementation principle of the photovoltaic cable of the embodiment is as follows: the outer sheath 7 is used as an outermost protective layer, and the metal waterproof layer 6 effectively reduces water penetrating into the photovoltaic cable, so that the condition that the photovoltaic cable is short-circuited due to water penetration is reduced.
Example 9
The embodiment discloses a photovoltaic cable, refer to fig. 4, including cable body 1, cable body 1 includes conductor inner core 2, and the cover is equipped with insulating layer 3 on the conductor inner core 2, and insulating layer 3 outer cover is equipped with waterproof sheath 4. The waterproof sheath 4 comprises a nonmetal waterproof layer 5 sleeved on the insulating layer 3, a metal waterproof layer 6 is sleeved on the nonmetal waterproof layer 5, and an outer sheath 7 is sleeved on the metal waterproof layer 6.
In this embodiment, the material of the conductor inner core 2 is copper, the material of the insulating layer 3 is irradiation crosslinking polyolefin cable material, the material of the nonmetal waterproof layer 5 is nylon, the metal waterproof layer 6 is formed by longitudinally wrapping a steel-plastic composite belt, the material of the outer sheath 7 is polyvinyl chloride, and in other embodiments, polyurethane or crosslinking polyolefin can be used.
The implementation principle of the photovoltaic cable of the embodiment is as follows: the outer sheath 7 is used as an outermost protective layer, and the nonmetal waterproof layer 5 and the metal waterproof layer 6 effectively reduce water penetrating into the photovoltaic cable, so that the condition that the photovoltaic cable is short-circuited due to water penetration is reduced.
Example 10
The embodiment discloses a photovoltaic cable, refer to fig. 5, including two sets of cable bodies 1, cable body 1 includes conductor inner core 2, and the cover is equipped with insulating layer 3 on the conductor inner core 2, and insulating layer 3 outside cover is equipped with waterproof sheath 4. The outermost layers of the waterproof jackets 4 of the two groups of cable bodies 1 are fixedly connected.
In the embodiment, the material of the conductor inner core 2 is copper, the material of the insulating layer 3 is irradiation crosslinking polyolefin cable material, and the material of the waterproof sheath 4 is the photovoltaic cable sheath material prepared in the embodiment 2.
In another embodiment, the cable body 1 is provided with MC4 connectors at both ends.
Example 11
The embodiment discloses a photovoltaic cable, refer to fig. 6, including two sets of cable bodies 1, including cable body 1, cable body 1 includes conductor inner core 2, and the cover is equipped with insulating layer 3 on the conductor inner core 2, and insulating layer 3 outer cover is equipped with waterproof sheath 4. The waterproof sheath 4 comprises a nonmetallic waterproof layer 5 sleeved on the insulating layer 3, and an outer sheath 7 is sleeved on the nonmetallic waterproof layer 5. The outermost layers of the outer jackets 7 of the two groups of cable bodies 1 are fixedly connected.
In this embodiment, the material of the conductor inner core 2 is copper, the material of the insulating layer 3 is irradiation crosslinked polyolefin cable material, the material of the nonmetal waterproof layer 5 is nylon, the material of the outer sheath 7 is polyvinyl chloride, and in other embodiments, polyurethane or crosslinked polyolefin can be used.
In another embodiment, the cable body 1 is provided with MC4 connectors at both ends.
Example 12
The embodiment discloses a photovoltaic cable, refer to fig. 7, including two sets of cable bodies 1, including cable body 1, cable body 1 includes conductor inner core 2, and the cover is equipped with insulating layer 3 on the conductor inner core 2, and insulating layer 3 outer cover is equipped with waterproof sheath 4. The waterproof sheath 4 comprises a metal waterproof layer 6 sleeved on the insulating layer 3, and an outer sheath 7 is sleeved on the metal waterproof layer 6. The outermost layers of the outer jackets 7 of the two groups of cable bodies 1 are fixedly connected.
In this embodiment, the material of the conductor inner core 2 is copper, the material of the insulating layer 3 is irradiation crosslinked polyolefin cable material, the metal waterproof layer 6 is formed by longitudinally wrapping a steel-plastic composite tape, the material of the outer sheath 7 is polyvinyl chloride, and in other embodiments, polyurethane or crosslinked polyolefin can be used.
In another embodiment, the cable body 1 is provided with MC4 connectors at both ends.
Example 13
The embodiment discloses a photovoltaic cable, refer to fig. 8, including two sets of cable bodies 1, cable body 1 includes conductor inner core 2, and the cover is equipped with insulating layer 3 on the conductor inner core 2, and insulating layer 3 outer cover is equipped with waterproof sheath 4. The waterproof sheath 4 comprises a nonmetal waterproof layer 5 sleeved on the insulating layer 3, a metal waterproof layer 6 is sleeved on the nonmetal waterproof layer 5, and an outer sheath 7 is sleeved on the metal waterproof layer 6. The outermost layers of the outer jackets 7 of the two groups of cable bodies 1 are fixedly connected.
In this embodiment, the material of the conductor inner core 2 is copper, the material of the insulating layer 3 is irradiation crosslinking polyolefin cable material, the material of the nonmetal waterproof layer 5 is nylon, the metal waterproof layer 6 is formed by longitudinally wrapping a steel-plastic composite belt, the material of the outer sheath 7 is polyvinyl chloride, and in other embodiments, polyurethane or crosslinking polyolefin can be used.
In another embodiment, the cable body 1 is provided with MC4 connectors at both ends.
Comparative example
Comparative example 1
The comparative example discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 22.5kg of ethylene propylene diene monomer rubber, 4kg of zinc stearate, 4kg of calcium stearate, 1kg of ultraviolet absorber, 10kg of nano mesoporous molecular sieve and 5kg of polyether polyol are mixed, dried for 12 hours at 100 ℃, then added into a double screw extruder for melt blending, and extrusion is carried out to obtain the sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of the machine head is 220 ℃, the temperature of the melt is 220 ℃, the screw speed of a host machine is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Comparative example 2
The comparative example discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 22.5kg of ethylene propylene diene monomer rubber, 4kg of zinc stearate, 4kg of calcium stearate, 1kg of ultraviolet absorbent and 3.5kg of hydrophobic corn fiber glue prepared in the preparation example are mixed, dried for 12 hours at 100 ℃, then added into a double screw extruder for melt blending, and extrusion is carried out to obtain sheath material master batch, wherein the processing temperature of a first area of the extruder is 220 ℃, the processing temperature of a second area is 220 ℃, the processing temperature of a third area is 230 ℃, the processing temperature of a fourth area is 230 ℃, the processing temperature of a fifth area is 230 ℃, the processing temperature of a sixth area is 230 ℃, the processing temperature of a machine head is 220 ℃, the temperature of a melt is 220 ℃, the screw speed of a main screw is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Comparative example 3
The comparative example discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 4kg of zinc stearate, 4kg of calcium stearate, 1kg of ultraviolet absorbent, 10kg of nano-scale mesoporous molecular sieve, 5kg of polyether polyol and 3.5kg of hydrophobic corn fiber gum prepared in the preparation example are mixed, dried for 12 hours at 100 ℃, then added into a double screw extruder for melt blending, and extrusion is carried out to obtain sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of the machine head is 220 ℃, the temperature of the melt temperature is 220 ℃, the screw speed of a host machine is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Comparative example 4
The comparative example discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 22.5kg of ethylene propylene diene monomer rubber, 4kg of zinc stearate, 4kg of calcium stearate and 1kg of ultraviolet absorbent are mixed, dried for 12 hours at 100 ℃, then added into a double-screw extruder for melt blending, and extruded to obtain sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of a machine head is 220 ℃, the temperature of the melt temperature is 220 ℃, the speed of a main screw is 150rpm, and the speed of a feeding screw is 12rpm.
Comparative example 5
The comparative example discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 4kg of zinc stearate, 4kg of calcium stearate, 1kg of ultraviolet absorbent, 10kg of nano-scale mesoporous molecular sieve and 5kg of polyether polyol are mixed, dried for 12 hours at 100 ℃, then added into a double-screw extruder for melt blending, and extruded to obtain sheath material master batch, wherein the processing temperature of a first area of the extruder is 220 ℃, the processing temperature of a second area is 220 ℃, the processing temperature of a third area is 230 ℃, the processing temperature of a fourth area is 230 ℃, the processing temperature of a fifth area is 230 ℃, the processing temperature of a sixth area is 230 ℃, the processing temperature of a machine head is 220 ℃, the temperature of a melt temperature is 220 ℃, the screw speed of a host machine is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Comparative example 6
The comparative example discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 4kg of zinc stearate, 4kg of calcium stearate, 1kg of ultraviolet absorbent and 3.5kg of hydrophobic corn fiber gum prepared in the preparation example are mixed, dried at 100 ℃ for 12 hours, and then added into a double-screw extruder for melt blending, and extrusion is carried out to obtain sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region is 220 ℃, the processing temperature of the third region is 230 ℃, the processing temperature of the fourth region is 230 ℃, the processing temperature of the fifth region is 230 ℃, the processing temperature of the sixth region is 230 ℃, the processing temperature of a machine head is 220 ℃, the temperature of the melt temperature is 220 ℃, the screw speed of a host machine is 150rpm, and the rotating speed of a feeding screw is 12rpm.
Comparative example 7
The comparative example discloses a photovoltaic cable sheath material, which is prepared by the following steps:
90kg of high-density polyethylene, 4kg of zinc stearate, 4kg of calcium stearate and 1kg of ultraviolet absorbent are mixed, dried for 12 hours at 100 ℃, then added into a double-screw extruder for melt blending, and extruded to obtain the sheath material master batch, wherein the processing temperature of the first region of the extruder is 220 ℃, the processing temperature of the second region of the extruder is 220 ℃, the processing temperature of the third region of the extruder is 230 ℃, the processing temperature of the fourth region of the extruder is 230 ℃, the processing temperature of the fifth region of the extruder is 230 ℃, the processing temperature of the sixth region of the extruder is 230 ℃, the processing temperature of the machine head is 220 ℃, the temperature of the melt temperature is 220 ℃, the rotational speed of a host screw is 150rpm, and the rotational speed of a feeding screw is 12rpm.
Performance test
The sheath materials prepared in examples 1 to 5 and comparative examples 1 to 7 were made into cable outer sheaths, and photovoltaic cables were assembled according to the structure of example 6, and then subjected to a water immersion voltage test.
Immersion voltage test:
s1, placing a finished cable (20 m) in water at the temperature of (20+/-5) ℃ for soaking for 1 day;
s2, taking out the cable, and connecting voltage test equipment at two ends of the cable;
s3, applying voltage of alternating current 6.5kV or direct current 15 kV;
s4, maintaining for 5min, wherein the cable is not broken down;
s5, repeating the operation until the cable is broken down, and recording the total soaking duration.
The jacket materials prepared in examples 1 to 5 and comparative examples 1 to 7 were injection molded into corresponding shaped specimens for tensile strength and impact strength test of the simply supported beams.
Tensile strength: determination of tensile Properties of plastics section 1, see GB/T1040.1-2006: general rule (general rule).
Impact strength of simple beam: determination of impact Properties of Plastic simply-supported beams, section 1, see GB/T1043.1-2008: and detecting the A-type notch sample of the non-instrumented impact test.
Table 1 table of performance test data
It can be seen from the combination of examples 1-3 and table 1 that the water erosion resistance, tensile strength and impact resistance of the sheath material can be adjusted by adjusting the addition ratio of the raw materials, and the performance of the sheath material can be effectively improved by selecting the ratio with the best performance.
It can be seen by combining example 2, example 4 and example 5 and combining table 1 that the tensile strength and impact strength of the sheath material are improved by combining the nano mesoporous molecular sieve and the polyether polyol, firstly, the nano mesoporous molecular sieve is added to make the structure of the sheath material more compact, the strength reduction caused by the ethylene propylene diene monomer is compensated, meanwhile, the nano mesoporous molecular sieve is added to further improve the water resistance of the sheath material, and the polyether polyol molecular chain is added to improve the impact resistance of the sheath material, meanwhile, the crystallinity is improved under the promotion effect of the nano mesoporous molecular sieve because of being combined with the nano mesoporous molecular sieve, the strength reduction caused by the ethylene propylene diene monomer is further compensated, and the strength of the sheath material is effectively improved.
It can be seen by combining example 2 and comparative examples 1-7 and combining table 1 that the hydrophobically modified corn fiber glue is used as an interface stabilizer, so that the bonding strength of raw materials such as high-density polyethylene, ethylene propylene diene monomer rubber and filler is improved, the ethylene propylene diene monomer rubber improves the waterproof performance of the high-strength polyethylene, the filler compensates the strength reduction caused by the ethylene propylene diene monomer rubber, and the hydrophobically modified corn fiber glue on the surface layer further improves the waterproof performance of the sheath material.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. The utility model provides a waterproof photovoltaic cable for shoal, its characterized in that includes cable body (1), cable body (1) include conductor inner core (2), the cover is equipped with insulating layer (3) on conductor inner core (2), the cover is equipped with waterproof sheath (4) on insulating layer (3).
2. The waterproof photovoltaic cable for a shoal according to claim 1, characterized in that: the cable bodies (1) are arranged in two groups, and the outermost layers of the waterproof jackets (4) of the two groups of cable bodies (1) are fixedly connected.
3. The waterproof photovoltaic cable for shoal according to claim 1 or 2, characterized in that: the waterproof sheath (4) comprises a waterproof layer sleeved on the insulating layer (3) and an outer sheath (7) sleeved on the waterproof layer.
4. A watertight photovoltaic cable for a shoal according to claim 3, characterized in that: the waterproof layer is a nonmetal waterproof layer (5) or a metal waterproof layer (6).
5. A watertight photovoltaic cable for a shoal according to claim 3, characterized in that: the waterproof layer comprises a nonmetal waterproof layer (5) sleeved on the insulating layer (3), and a metal waterproof layer (6) is sleeved on the nonmetal waterproof layer (5).
6. The waterproof photovoltaic cable for a shoal according to claim 1, characterized in that: the waterproof sheath (4) is made of a sheath material, and the sheath material is prepared from the following raw materials in parts by weight: 80-100 parts of high-density polyethylene, 37-45 parts of waterproof modifier, 3-5 parts of zinc stearate, 3-5 parts of calcium stearate and 0.5-1.5 parts of ultraviolet absorber; the waterproof modifier comprises ethylene propylene diene monomer, a reinforcing agent and a compatilizer, wherein the weight ratio of the ethylene propylene diene monomer to the reinforcing agent to the interfacial stabilizer is 20-25:15:2-5.
7. The waterproof photovoltaic cable for a shoal according to claim 6, characterized in that: the reinforcing agent comprises a filler and a toughening agent, wherein the weight ratio of the filler to the toughening agent is 2:1.
8. The waterproof photovoltaic cable for a shoal according to claim 7, characterized in that: the filler is a nano mesoporous molecular sieve, and the toughening agent is polyether polyol.
9. The waterproof photovoltaic cable for a shoal according to claim 6, characterized in that: the interface stabilizer is hydrophobic corn fiber glue.
10. The waterproof photovoltaic cable for a shoal according to claim 6, characterized in that: the sheath material is prepared by the following steps: and (3) blending the high-density polyethylene, the ethylene propylene diene monomer, the filler and the interface stabilizer, pre-drying, and carrying out melt extrusion granulation on the dried mixture to obtain the sheath material.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118006025A (en) * | 2024-04-09 | 2024-05-10 | 玖开特种线缆(上海)有限公司 | Marine photovoltaic cable insulation sheath material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118006025A (en) * | 2024-04-09 | 2024-05-10 | 玖开特种线缆(上海)有限公司 | Marine photovoltaic cable insulation sheath material and preparation method thereof |
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