CN217506979U - Novel photovoltaic cable for water photovoltaic power generation system - Google Patents
Novel photovoltaic cable for water photovoltaic power generation system Download PDFInfo
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- CN217506979U CN217506979U CN202220923689.5U CN202220923689U CN217506979U CN 217506979 U CN217506979 U CN 217506979U CN 202220923689 U CN202220923689 U CN 202220923689U CN 217506979 U CN217506979 U CN 217506979U
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Abstract
The utility model discloses a novel photovoltaic cable for a water photovoltaic power generation system, which comprises an insulating wire core, a filling layer, a moisture barrier layer, a flexible buffer layer and a sheath layer which are arranged from inside to outside in sequence; the cable also comprises a waterproof layer, wherein the waterproof layer comprises a central waterproof layer arranged outside the filling layer, a waterproof reinforcing layer arranged outside the flexible buffer layer and an integral waterproof layer arranged outside the sheath layer; the filling layer and the flexible buffer layer are made of foaming type polyolefin materials; the waterproof layer is made of polyurethane materials. The utility model discloses a light in weight has effectually reduced the interface of cable with water, reduces the probability that moisture got into the cable, prevents that insulation core from weing and corroding or puncturing. Form fine and close waterproof film structure after the waterproof layer is dry, multilayer waterproof construction alternately synergism can prevent effectively that outside moisture, salt fog from corroding key parts such as cable insulation core, conductor to improve the operation of cable under humid environment reliable and stable.
Description
Technical Field
The utility model relates to a cable specifically is a photovoltaic power generation system on water uses novel photovoltaic cable.
Background
Along with the continuous increase of photovoltaic development speed, the application mode of photovoltaic power generation will present the development trend of multi-field and diversification, except for large-scale centralized photovoltaic power stations, photovoltaic power stations begin to shift to multi-scene application, and the fishing light integration, offshore photovoltaics, shoal photovoltaics and the like are combined with the water surface to form the overwater photovoltaic power station mode, and various green photovoltaic applications such as 'photovoltaic +', appear.
Photovoltaic power generation on water is because of its special installation service environment, like fresh water environment, sea water environment, humid environment, water smoke environment, damp and hot environment etc. subassembly such as photovoltaic cable not only need often expose under sunshine, receives high temperature and ultraviolet radiation for a long time, still can soak in the aquatic with water contact even for a long time simultaneously, and it is abominable that the outdoor environment of laying is bad, can satisfy the novel photovoltaic cable of this type of applied scene demand and become future photovoltaic cable's main technical research direction.
The common photovoltaic cable does not have a special water-blocking structure layer, and the common waterproof photovoltaic cable on the market mainly adopts a water-blocking material and/or a layer of water-blocking tape is wrapped outside a cable core. The waterproof cable has general waterproof and moistureproof effects, and is difficult to prevent moisture from permeating into the cable for a long time in an overwater photovoltaic power generation application scene, so that the service life of the cable is short, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a technical aim at: aiming at the defects of the prior art, the photovoltaic cable for the water photovoltaic power generation system is light in weight, good in waterproof effect and capable of meeting various application environments such as a fresh water environment, a seawater environment, a humid environment, a water mist environment and a damp and hot environment.
The technical purpose of the utility model is realized through the following technical scheme:
a novel photovoltaic cable for an overwater photovoltaic power generation system comprises an insulating wire core, a filling layer, a moisture barrier layer, a flexible buffer layer and a sheath layer which are sequentially arranged from inside to outside; the cable also comprises a waterproof layer, wherein the waterproof layer comprises a central waterproof layer arranged outside the filling layer, a waterproof reinforcing layer arranged outside the flexible buffer layer and an integral waterproof layer arranged outside the sheath layer; the filling layer and the flexible buffer layer are made of foamed polyolefin materials; the waterproof layer is made of polyurethane materials.
The thickness of central waterproof layer, waterproof reinforcement layer and whole waterproof layer is 0.2 ~ 0.5 mm.
The moisture barrier layer consists of an aluminum-plastic composite belt longitudinal cladding layer and a polyethylene plastic layer coated outside the aluminum-plastic composite belt longitudinal cladding layer.
The insulated wire core consists of a conductor and an irradiation cross-linked polyolefin insulating layer extruded outside the conductor
The conductor is made of a tinned soft copper conductor, a soft aluminum alloy conductor or an aluminum conductor, and the maximum diameter of a monofilament of the conductor is less than 0.3 mm.
The sheath layer is made of irradiation cross-linked polyolefin material.
The utility model has the beneficial technical effects that:
1. the utility model discloses an insulating core sets up the filling layer that adopts the processing of foaming type polyolefin material to make outward and sets up the flexible buffer layer that adopts the processing of foaming type polyolefin material to make outside keeping off the tide layer, because foaming type polyolefin material has the quality light, mechanical shock prevention, the characteristics that water-proof effects is excellent, consequently, filling layer and the flexible buffer layer that adopt this material to make can effectual reduction physics collide the damage to insulating core, can reduce the cable dead weight simultaneously, make the cable can float on the surface of water when laying the operation, the effectual contact surface that reduces cable and water, reduce the probability that moisture gets into the cable, prevent that insulating core from suffering from the tide and corroding or puncturing. Meanwhile, in order to further improve the waterproof effect, a waterproof layer made of a polyurethane material is further arranged. The central waterproof layer is arranged outside the filling layer, and the waterproof reinforcing layer is arranged outside the flexible buffer layer; the small holes formed after the surface of the filling layer and the flexible buffer layer is foamed can be effectively filled, and the moisture is prevented from entering the small holes. After drying, a compact waterproof film structure is formed. Through multilayer waterproof construction alternately synergism, can effectually prevent that outside moisture, salt fog from corroding key parts such as cable insulation core, conductor to improve the operation of cable under fresh water environment, sea water environment, humid environment, water smoke environment, damp and hot environment etc. and reliably stable.
2. The utility model discloses a thickness of center waterproof layer, waterproof strengthening layer and whole waterproof layer is 0.2 ~ 0.5 mm. After drying, a compact waterproof film structure is formed. It has the technical advantages of good waterproofness, thin thickness and light structure.
3. The utility model discloses a moisture barrier layer is indulged the covering by the aluminum-plastic composite tape and is wrapped in the outside polyethylene layer of aluminum-plastic composite tape indulges the covering and constitute. By adopting the technical measure, the waterproof and moistureproof structure has the technical advantage of compact structure.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is another schematic structural diagram of the present invention;
the reference numbers in the figures mean: 1-an insulated wire core; 11-a conductor; 12-irradiating a cross-linked polyolefin insulation layer; 2-a filling layer; 3-moisture barrier layer; 31-longitudinal cladding of aluminum-plastic composite belt; 32-polyethylene plastic layer; 4-a flexible buffer layer; 5, a sheath layer; 6-waterproof layer; 61-central waterproof layer; 62-waterproof reinforcing layer; 63-integral waterproof layer.
Detailed Description
The utility model relates to a cable, this cable are photovoltaic cable for photovoltaic power generation system on water usually, also can be other scene photovoltaic power generation system and use photovoltaic cable, and it is right with a plurality of embodiments below the utility model discloses a main part technical content carries out the detailed description.
Example 1
As shown in fig. 1 and 2, a novel photovoltaic cable for an above-water photovoltaic power generation system comprises an insulating wire core 1, a filling layer 2, a moisture barrier layer 3, a flexible buffer layer 4 and a sheath layer 5 which are sequentially arranged from inside to outside; the cable also comprises a waterproof layer 6, wherein the waterproof layer 6 comprises a central waterproof layer 61 arranged outside the filling layer 2, a waterproof reinforcing layer 62 arranged outside the flexible buffer layer 4 and an integral waterproof layer 63 arranged outside the sheath layer 5; the filling layer 2 and the flexible buffer layer 4 are made of foaming type polyolefin materials; the waterproof layer 6 is made of hydrophobic polyurethane material. The sheath layer 5 is processed by radiation cross-linked polyolefin material.
Specifically, the insulated wire core 1 is composed of a conductor 11 and an irradiation cross-linked polyolefin insulating layer 12 extruded outside the conductor 11. The conductor 11 is formed by twisting a plurality of monofilaments; the conductor 11 is made of a tinned soft copper conductor, a soft aluminum alloy conductor or an aluminum conductor, and the maximum diameter of a monofilament of the conductor 11 is less than 0.3 mm. The packing layer 2 made of foaming type polyolefin materials is arranged outside the insulated wire core 1, and the flexible buffer layer 4 made of foaming type polyolefin materials is arranged outside the moisture barrier layer 3, and the foaming type polyolefin materials have the characteristics of light weight, mechanical impact resistance and excellent waterproof effect, so that the packing layer 2 and the flexible buffer layer 4 made of the materials can effectively reduce the damage of physical impact on the insulated wire core 1, can reduce the dead weight of the cable, enable the cable to float on the water surface during laying operation, effectively reduce the contact surface between the cable and water, reduce the probability of moisture and humidity entering the cable, and prevent the insulated wire core from being corroded or broken down due to moisture.
In order to further improve the waterproof effect, a waterproof layer 6 is further arranged. Specifically, the waterproof layer 6 includes a central waterproof layer 61 outside the filling layer 2, a waterproof reinforcing layer 62 provided outside the flexible buffer layer 4, and an integral waterproof layer 63 provided outside the sheath layer 5. The waterproof layer 6 is made of hydrophobic polyurethane material; a central waterproof layer 61 is arranged outside the filling layer 2, and a waterproof reinforcing layer 62 is arranged outside the flexible buffer layer 4; the small holes formed after the surfaces of the filling layer 2 and the flexible buffer layer 4 are foamed can be effectively filled, and water is prevented from entering the small holes. After drying, a compact waterproof film structure is formed. Through multilayer waterproof construction alternately synergism, can effectually prevent that outside moisture, salt fog from corroding key parts such as cable insulation core 1, conductor 11 to improve the operation of cable under fresh water environment, sea water environment, humid environment, water smoke environment, damp and hot environment etc. and reliably stable.
In actual use, the hydrophobic polyurethane material is made of a polyurethane material, the ultraviolet aging resistant agent is added into the material, and the whole waterproof layer 63 is coated outside the sheath layer 5, so that the photovoltaic cable sheath has excellent moisture resistance, can meet long-term outdoor operation, and meets basic requirements of a photovoltaic cable operation environment.
As shown in fig. 1 and 2, the central waterproof layer 61, the waterproof reinforcing layer 62, and the entire waterproof layer 63 have a thickness of 0.2 to 0.5 mm. When the flexible buffer layer is actually used, the technical measures can be adopted to effectively fill the small holes formed after the surfaces of the filling layer 2 and the flexible buffer layer 4 are foamed, and prevent water from entering the small holes. After drying, a compact waterproof film structure is formed. It has the technical advantages of good waterproofness, thin thickness and light structure.
As shown in fig. 1 and 2, the moisture barrier layer 3 is composed of an aluminum-plastic composite tape longitudinal cladding layer 31 and a polyethylene plastic layer 32 covering the aluminum-plastic composite tape longitudinal cladding layer 31. By adopting the technical measure, the waterproof and moistureproof structure has the technical advantage of compact structure.
Preparation of novel photovoltaic cable for photovoltaic power generation system on water:
s1, stranding a plurality of strands of tinned soft copper wires, soft aluminum alloy wires or soft aluminum to form a conductor 11;
s2, extruding and wrapping an irradiation crosslinking polyolefin insulating material outside the conductor 11, and performing electron beam irradiation process to crosslink and solidify the insulation to form an irradiation crosslinking polyolefin insulating layer 12 to obtain an insulating wire core 1;
s3, cabling and stranding a plurality of the insulated wire cores 1 obtained in the step S2, preparing a filling layer 2 by foaming and expanding gaps among the insulated wire cores 1 by adopting a foaming type polyolefin material, wherein the filling layer is rounded, and completely coating the insulated wire cores 1;
s4, uniformly coating a hydrophobic polyurethane material outside the filling layer 2 in a repeated spraying or brushing mode, wherein the coating thickness is 0.2-0.5 mm, dehumidifying, drying, cooling and shaping in a three-section cooling mode after coating, wherein the first section is dried by an oven at 70-80 ℃, the second section is dried by hot air at 50-60 ℃, and the third section is cooled by normal-temperature air; after cooling, a black compact and high-elasticity waterproof film is formed; preparing a central waterproof layer 61;
s5, longitudinally wrapping the central waterproof layer 61 with the aluminum-plastic composite tape to form a longitudinally wrapped overlapping region outside the central waterproof layer 61, performing seamless welding treatment on the longitudinally wrapped overlapping region of the aluminum-plastic composite tape, and synchronously extruding and wrapping a polyethylene plastic layer 32 outside the longitudinally wrapped layer 31 of the aluminum-plastic composite tape to obtain a moisture barrier layer 3;
s6, preparing a flexible buffer layer 4 by adopting a foaming type polyolefin material outside the moisture barrier layer 3 through foaming expansion;
s7, uniformly coating a hydrophobic polyurethane material outside the flexible buffer layer 4 in a repeated spraying or brushing way, wherein the coating thickness is 0.2-0.5 mm, dehumidifying, drying, cooling and shaping in a three-section cooling way after coating, wherein the first section is dried by an oven at 70-80 ℃, the second section is dried by hot air at 50-60 ℃, the third section is cooled by air at normal temperature, and a black compact and high-elasticity waterproof membrane is formed after cooling to prepare a waterproof reinforcing layer 62;
s8, extruding and coating irradiation cross-linked polyolefin sheath material outside the waterproof reinforcing layer 62, and performing electron beam irradiation process to cross-link and solidify the sheath to form a sheath layer 5;
and S9, continuously adopting a repeated spraying or brushing mode outside the sheath layer 5, uniformly coating a hydrophobic polyurethane material with a coating thickness of 0.2-0.5 mm, dehumidifying, drying, cooling and shaping by adopting a three-section cooling mode after coating, baking and dehumidifying by adopting an oven at 70-80 ℃ in the first section, drying by adopting hot air at 50-60 ℃ in the second section, and cooling by adopting normal-temperature air in the third section. After cooling, a black compact and high-elasticity waterproof membrane is formed; and an integral waterproof layer 8 is manufactured.
The preparation method of the filling layer 2 in the step S3 and the flexible buffer layer 4 in the step S6 is as follows:
1) weighing 38 parts of polyethylene base material, 49 parts of ethylene/methacrylic acid copolymer (EMA), 5 parts of accelerant and 4 parts of stearic acid, fully mixing in a low-speed mixer, then mixing in a plasticator for about 30-35min, controlling the temperature at 100-120 ℃, adding 1 part of AC foaming agent into the plasticized sheet, cooling to 70-90 ℃, mixing for 10-15 min, adding 3 parts of talcum powder, and mixing at 70-90 ℃ for 5-10 min;
2) putting the sheet material plasticated in the step 1) into a die, cooling at 100-120 ℃ and under 0.3-0.8 Mpa for 10-12 min, taking out a blank, and crushing into granules;
3) and putting the crushed granules obtained in the step 2) into an extruding machine, controlling the temperature of a machine head at 180-200 ℃, extruding and wrapping the granules on a cable, then adopting heating equipment for heat preservation for 1-2 min, keeping the heat preservation temperature at 190-195 ℃, and passing through a shaping mold to expand, foam and mold the granules to form the filling layer 2 and the flexible buffer layer 4.
The preparation methods of the central waterproof layer 61 in the step S4, the waterproof reinforcing layer 62 in the step S7, and the integral waterproof layer 63 in the step S9 are as follows:
1) firstly dehydrating 31 parts of polyester polyol at the temperature of 80-90 ℃ for 2-3 min, then heating and stirring the polyester polyol and 59 parts of isocyanate in a nitrogen atmosphere for 10-30 min at the heating temperature of 50-60 ℃ to react to prepare a polyurethane prepolymer, and sealing and storing the prepolymer;
2) sequentially adding 1 part of antioxidant, 3 parts of thickener, 2 parts of plasticizer and 3 parts of anti-ultraviolet aging agent into the polyurethane prepolymer prepared in the step 1), and continuously stirring at normal temperature for 10-15 min to form a mixture with certain viscosity;
3) adding 1 part of quick drying agent into the mixture obtained in the step 2), and stirring at room temperature for 5-10 min to obtain a hydrophobic polyurethane material;
4) and uniformly coating the hydrophobic polyurethane material obtained in the step 3) outside the filling layer 2, the flexible buffer layer 4 and the sheath layer 5 by repeatedly spraying or brushing for multiple times to form a central waterproof layer 61, a waterproof reinforcing layer 62 and an integral waterproof layer 63.
Wherein, the isocyanate adopts low-viscosity polyisocyanate containing-NCO group.
Example 2
The difference from example 1 is:
the preparation method of the filling layer 2 in the step S3 and the flexible buffer layer 4 in the step S6 is as follows:
1) weighing 32 parts of polyethylene base material, 53 parts of ethylene/methacrylic acid copolymer (EMA), 7 parts of accelerant and 5 parts of stearic acid, fully mixing in a low-speed mixer, then mixing in a plasticator for about 30-35min, controlling the temperature at 100-120 ℃, adding 2 parts of AC foaming agent into the plasticized sheet, cooling to 70-90 ℃, mixing for 10-15 min, adding 1 part of talcum powder, and mixing at 70-90 ℃ for 5-10 min;
2) putting the sheet material plasticated in the step 1) into a die, cooling at 100-120 ℃ and under 0.3-0.8 Mpa for 10-12 min, taking out a blank, and crushing into granules;
3) and putting the crushed granules obtained in the step 2) into an extruding machine, controlling the temperature of a machine head at 180-200 ℃, extruding and wrapping the granules on a cable, then adopting heating equipment for heat preservation for 1-2 min, keeping the heat preservation temperature at 190-195 ℃, and passing through a shaping mold to expand, foam and mold the granules to form the filling layer 2 and the flexible buffer layer 4.
Example 3
The difference from example 1 is:
the preparation method of the filling layer 2 in the step S3 and the flexible buffer layer 4 in the step S6 is as follows:
1) weighing 36 parts of polyethylene base material, 48 parts of ethylene/methacrylic acid copolymer (EMA), 4 parts of accelerant and 7 parts of stearic acid, fully mixing in a low-speed mixer, then mixing in a plasticator for about 30-35min, controlling the temperature at 100-120 ℃, adding 3 parts of AC foaming agent into the plasticized sheet, cooling to 70-90 ℃, mixing for 10-15 min, adding 2 parts of talcum powder, and mixing at 70-90 ℃ for 5-10 min;
2) putting the sheet material plasticated in the step 1) into a die, cooling at 100-120 ℃ and under 0.3-0.8 Mpa for 10-12 min, taking out a blank, and crushing into granules;
3) and putting the crushed granules obtained in the step 2) into an extruding machine, controlling the temperature of a machine head at 180-200 ℃, extruding and wrapping the granules on a cable, then adopting heating equipment for heat preservation for 1-2 min, keeping the heat preservation temperature at 190-195 ℃, and passing through a shaping mold to expand, foam and mold the granules to form the filling layer 2 and the flexible buffer layer 4.
Example 4
The difference from example 1 is:
the preparation methods of the central waterproof layer 61 in the step S4, the waterproof reinforcing layer 62 in the step S7, and the integral waterproof layer 63 in the step S9 are as follows:
1) firstly, dehydrating 32 parts of polyester polyol at 80-90 ℃ for 2-3 min, then heating and stirring the polyester polyol and 53 parts of isocyanate in a nitrogen atmosphere for 10-30 min at the heating temperature of 50-60 ℃ to react to prepare a polyurethane prepolymer, and sealing and storing the prepolymer;
2) sequentially adding 2 parts of antioxidant, 5 parts of thickener, 1 part of plasticizer and 4 parts of anti-ultraviolet aging agent into the polyurethane prepolymer prepared in the step 1), and continuously stirring at normal temperature for 10-15 min to form a mixture with certain viscosity;
3) adding 3 parts of quick drying agent into the mixture obtained in the step 2), and stirring at room temperature for 5-10 min to obtain a hydrophobic polyurethane material;
4) and uniformly coating the hydrophobic polyurethane material obtained in the step 3) outside the filling layer 2, the flexible buffer layer 4 and the sheath layer 5 by repeatedly spraying or brushing for multiple times to form a central waterproof layer 61, a waterproof reinforcing layer 62 and an integral waterproof layer 63.
Example 5
The difference from example 1 is:
the preparation methods of the central waterproof layer 61 in the step S4, the waterproof reinforcing layer 62 in the step S7, and the integral waterproof layer 63 in the step S9 are as follows:
1) dehydrating 23 parts of polyester polyol at 80-90 ℃ for 2-3 min, heating and stirring with 63 parts of isocyanate in a nitrogen atmosphere for 10-30 min at 50-60 ℃ to prepare a polyurethane prepolymer, and sealing and storing the prepolymer;
2) sequentially adding 3 parts of antioxidant, 4 parts of thickening agent, 3 parts of plasticizer and 2 parts of ultraviolet-resistant aging agent into the polyurethane prepolymer prepared in the step 1), and continuously stirring at normal temperature for 10-15 min to form a mixture with certain viscosity;
3) adding 2 parts of quick drying agent into the mixture obtained in the step 2), and stirring at room temperature for 5-10 min to obtain a hydrophobic polyurethane material;
4) and uniformly coating the hydrophobic polyurethane material obtained in the step 3) outside the filling layer 2, the flexible buffer layer 4 and the sheath layer 5 by repeatedly spraying or brushing for multiple times to form a central waterproof layer 61, a waterproof reinforcing layer 62 and an integral waterproof layer 63.
The above examples are only for illustrating the present invention and are not to be construed as limiting the same. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that they can still make modifications to the embodiments or equivalent substitutions of some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solution depart from the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a photovoltaic power generation system on water uses novel photovoltaic cable which characterized in that: comprises an insulating wire core (1), a filling layer (2), a moisture barrier layer (3), a flexible buffer layer (4) and a sheath layer (5) which are arranged from inside to outside in sequence;
the cable further comprises a waterproof layer (6), wherein the waterproof layer (6) comprises a central waterproof layer (61) arranged outside the filling layer (2), a waterproof reinforcing layer (62) arranged outside the flexible buffer layer (4) and an integral waterproof layer (63) arranged outside the sheath layer (5);
the filling layer (2) and the flexible buffer layer (4) are made of foamed polyolefin materials;
the waterproof layer (6) is made of polyurethane materials.
2. The novel photovoltaic cable for the waterborne photovoltaic power generation system according to claim 1, characterized in that: the thickness of the central waterproof layer (61), the waterproof reinforcing layer (62) and the whole waterproof layer (63) is 0.2-0.5 mm.
3. The novel photovoltaic cable for the waterborne photovoltaic power generation system according to claim 1, characterized in that: the moisture-proof layer (3) is composed of an aluminum-plastic composite belt longitudinal cladding layer (31) and a polyethylene plastic layer (32) which is coated outside the aluminum-plastic composite belt longitudinal cladding layer (31).
4. The novel photovoltaic cable for the above-water photovoltaic power generation system according to claim 1, characterized in that: the insulated wire core (1) is composed of a conductor (11) and an irradiation crosslinking polyolefin insulating layer (12) extruded outside the conductor (11).
5. The novel photovoltaic cable for the above-water photovoltaic power generation system according to claim 4, characterized in that: the conductor (11) is made of a tinned soft copper conductor, a soft aluminum alloy conductor or an aluminum conductor, and the maximum diameter of a monofilament of the conductor (11) is less than 0.3 mm.
6. The novel photovoltaic cable for the above-water photovoltaic power generation system according to claim 1, characterized in that: the sheath layer (5) is made of radiation cross-linked polyolefin materials.
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| CN202220923689.5U CN217506979U (en) | 2022-04-21 | 2022-04-21 | Novel photovoltaic cable for water photovoltaic power generation system |
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