CN114437497B - Energy-saving heat-resistant corrosion-resistant high-voltage tube bus - Google Patents
Energy-saving heat-resistant corrosion-resistant high-voltage tube bus Download PDFInfo
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- CN114437497B CN114437497B CN202111655447.9A CN202111655447A CN114437497B CN 114437497 B CN114437497 B CN 114437497B CN 202111655447 A CN202111655447 A CN 202111655447A CN 114437497 B CN114437497 B CN 114437497B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/061—Tubular casings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- 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
Abstract
The invention discloses an energy-saving heat-resistant anti-corrosion high-voltage tube bus, which comprises a high-voltage tube bus body and a heat-resistant anticorrosive layer arranged on the surface of the high-voltage tube bus body; the heat-resistant anticorrosive layer comprises the following components in parts by weight: 100 parts of phenolic resin, 12-18 parts of alumina, 10-15 parts of mica powder, 7-12 parts of terephthalic acid ester coated scandium silicate/yttrium silicate microspheres, 2-6 parts of polyvinyl alcohol, 0.5-1 part of pentaerythritol stearate and 3-5 parts of diethyl carbonate. The invention discloses an energy-saving heat-resistant anti-corrosion high-voltage tubular bus, wherein a heat-resistant anti-corrosion layer is arranged on the surface of the high-voltage tubular bus in a pouring manner, so that the high-voltage tubular bus has stronger heat resistance and corrosion resistance and also has certain heat dissipation performance, and the high-voltage tubular bus has the advantages of good heat resistance, good corrosion resistance and good heat dissipation performance.
Description
Technical Field
The invention relates to the field of high-voltage tubular buses, in particular to an energy-saving heat-resistant anti-corrosion high-voltage tubular bus.
Background
The tubular bus is one of key devices (materials) in the power transmission and transformation system, plays a vital role in the safe and reliable operation of the power transmission and transformation system and the power devices, is mainly applied to conductor connection between a power grid transmission lead and a transformer of a transformer substation, a jumper wire in a power transmission line, a connecting conductor in the power devices and a heavy-current direct-current ice melting device in the power construction engineering of China as an overcurrent conductor, is a brand new conductor for replacing the traditional rectangular, grooved, bar-shaped buses and flexible leads, is one of key devices (materials) in the power transmission and transformation system, and plays a vital role in the safe and reliable operation of the power transmission and transformation system and the power devices.
At present traditional high-voltage tube generating line is in order to make it to have stronger heat resistance and anticorrosive, often at the heat-resisting anticorrosive coating of surface coating, but because transmission current is big, lead to generating heat highly, the heat dispersion of the generating line is greatly influenced often to the setting of heat-resisting anticorrosive coating, and then leads to the generating line temperature rise to improve, not only consumes energy more and makes the current-carrying capacity of generating line reduce by a wide margin.
Disclosure of Invention
The invention aims to provide an energy-saving heat-resistant anti-corrosion high-voltage tube bus, aiming at the problems that the heat dissipation performance of the bus is often greatly influenced by the arrangement of a heat-resistant anticorrosive layer in the prior art, the temperature rise of the bus is further improved, more energy is consumed, and the current-carrying capacity of the bus is greatly reduced.
The purpose of the invention is realized by adopting the following technical scheme:
an energy-saving heat-resistant anti-corrosion high-voltage tube bus comprises a high-voltage tube bus body and a heat-resistant anticorrosive layer arranged on the surface of the high-voltage tube bus body; the heat-resistant anticorrosive layer comprises the following components in parts by weight:
100 parts of phenolic resin, 12-18 parts of alumina, 10-15 parts of mica powder, 7-12 parts of terephthalic acid ester coated scandium silicate/yttrium silicate microspheres, 2-6 parts of polyvinyl alcohol, 0.5-1 part of pentaerythritol stearate and 3-5 parts of diethyl carbonate.
Preferably, the bus body is a copper-clad aluminum bus.
Preferably, the particle size of the alumina is 20 to 60 mesh.
Preferably, the particle size of the mica powder is 60-120 meshes.
Preferably, the particle size of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres is 800-1000 meshes.
Preferably, the polyvinyl alcohol has an average molecular weight of 10000 to 30000.
Preferably, the thickness of the heat-resistant anticorrosive layer is 20-30 mm.
Preferably, the preparation method of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres comprises the following steps:
(1) Preparing nano scandium silicate/yttrium silicate:
s1, weighing ethyl orthosilicate, mixing the ethyl orthosilicate with an ethanol solution, dispersing the ethyl orthosilicate and the ethanol solution uniformly, dropwise adding a mixed solution of scandium chloride and yttrium chloride while stirring, and continuously stirring for 6-10 hours after dropwise adding is finished to obtain a scandium silicate/yttrium silicate precursor;
wherein the mass fraction of the ethanol solution is 35-55%; the mixed solution of scandium chloride and yttrium chloride is obtained by mixing scandium chloride, yttrium chloride and deionized water according to the mass ratio of 1; the mass ratio of the ethyl orthosilicate and the ethanol solution to the mixed solution of scandium chloride and yttrium chloride is 1.2-1.6;
s2, carrying out reduced pressure drying on the scandium silicate/yttrium silicate precursor, then placing the scandium silicate/yttrium silicate precursor in a reaction furnace, heating to 900-1000 ℃, carrying out heat preservation treatment for 1-3 h, then heating to 1250-1400 ℃ again, carrying out heat preservation treatment for 2-4 h, naturally cooling to room temperature, and carrying out ball milling to obtain nano scandium silicate/yttrium silicate;
(2) Hydroxylated scandium silicate/yttrium silicate:
weighing 3- [ bis (2-hydroxyethyl) amino ] propane triethoxysilane, mixing with deionized water, dispersing uniformly, adding nano scandium silicate/yttrium silicate, heating to 55-65 ℃, stirring for 5-10 h, centrifuging, washing the obtained lower layer solid with pure water for three times, and drying under reduced pressure to obtain hydroxylated scandium silicate/yttrium silicate;
wherein the mass ratio of the nano scandium silicate/yttrium silicate to the aminopropyl triethoxysilane to the deionized water is 1;
(3) Preparing terephthalate-coated scandium silicate/yttrium silicate microspheres:
dispersing hydroxylated scandium silicate/yttrium silicate into N, N-dimethylformamide, adding terephthalic acid and phosphotungstic acid, heating to 120-140 ℃, stirring for 4-6 h, filtering, washing and drying obtained filter residues to obtain terephthalic acid ester coated scandium silicate/yttrium silicate microspheres;
wherein the mass ratio of the hydroxylated scandium silicate to the yttrium silicate to the terephthalic acid to the phosphotungstic acid to the N, N-dimethylformamide is 1.
Preferably, the particle size of the nano scandium silicate/yttrium silicate is 300-600 nm.
Preferably, the preparation method of the energy-saving heat-resistant anti-corrosion high-voltage pipe bus comprises the following steps:
step 1, weighing phenolic resin according to parts by weight, mixing the phenolic resin with polyvinyl alcohol, uniformly dispersing, adding terephthalic acid ester coated scandium silicate/yttrium silicate microspheres, heating to 55-65 ℃, stirring and mixing for 1-3 hours, and cooling to room temperature to obtain a phenolic resin mixture;
step 2, weighing aluminum oxide and mica powder according to parts by weight, mixing the aluminum oxide and the mica powder into a phenolic resin mixture, stirring and mixing uniformly, then adding diethyl carbonate weighed according to parts by weight, and mixing uniformly again to obtain a phenolic resin grouting material;
step 3, cleaning the high-voltage tube bus, placing the cleaned high-voltage tube bus in a casting mold, and injecting the phenolic resin grouting material into the casting mold to enable the phenolic resin grouting material to completely wrap the high-voltage tube bus;
and 4, placing the poured mould in a closed box for curing, and obtaining the energy-saving heat-resistant corrosion-resistant high-voltage tube bus after demoulding.
Preferably, in the step 3, ethanol or acetone is used for cleaning the high-pressure pipe bus, and after a release agent is coated inside the casting mold, the high-pressure pipe bus is placed into the casting mold and grouting is performed.
Preferably, in the step 4, the curing conditions are as follows: firstly, heat preservation and pressure maintaining treatment is carried out for 5-10 min under the conditions that the temperature is 140-150 ℃ and the pressure is 15-20 MPa, then the pressure is reduced to normal pressure, and heat preservation treatment is continuously carried out for 3-6 h.
The invention has the beneficial effects that:
the invention discloses an energy-saving heat-resistant anti-corrosion high-voltage tube bus, wherein a heat-resistant anti-corrosion layer is arranged on the surface of the high-voltage tube bus in a pouring mode, so that the high-voltage tube bus has high heat resistance and corrosion resistance and also has certain heat dissipation performance, and the high-voltage tube bus has the advantages of good heat resistance, good corrosion resistance and good heat dissipation performance.
The phenolic resin has good high temperature resistance, corrosion resistance, mechanical strength and flame retardance, but has poor toughness and poor weather resistance, so that the phenolic resin is easy to crack after being used for a period of time, and has poor thermal conductivity, thereby affecting the application of the phenolic resin on the surface of a bus. According to the invention, after the phenolic resin is mixed and modified by coating scandium silicate/yttrium silicate microspheres with terephthalate, the filler aluminum oxide and mica powder, the dispersant polyvinyl alcohol, the antioxidant, the lubricant pentaerythritol stearate and the curing agent diethyl carbonate are added, so that the finally prepared material has excellent toughness and weather resistance, and meanwhile, the high temperature resistance, corrosion resistance, mechanical strength and flame resistance of the phenolic resin can be ensured.
The prepared terephthalate-coated scandium silicate/yttrium silicate microsphere is of a shell-core structure, namely the microsphere obtained by taking nano scandium silicate/yttrium silicate as a core and terephthalate as a shell. The terephthalic acid ester serving as the shell of the microsphere can enhance the crosslinking property with the phenolic resin, so that the microsphere is more uniformly dispersed, and meanwhile, the terephthalic acid ester has a certain modification effect on the phenolic resin; compared with the conventional preparation of single metal silicate, the nano scandium silicate/yttrium silicate is prepared by combining scandium and yttrium, so that the scandium and yttrium can compensate each other, the effect which cannot be achieved by any single metal can be achieved, for example, the scandium and yttrium silicate has higher strength or stability, and the scandium and yttrium silicate serving as the inner core not only enhances the mechanical property of the phenolic resin, but also enhances the thermal conductivity and the flame retardance of the phenolic resin.
Detailed Description
The invention is further described below with reference to the following examples.
Example 1
An energy-saving heat-resistant anti-corrosion high-voltage tube bus comprises a high-voltage tube bus body and a heat-resistant anticorrosive layer arranged on the surface of the high-voltage tube bus body; the bus body is a copper clad aluminum bus, and the thickness of the heat-resistant anticorrosive coating is 25mm.
The heat-resistant anticorrosive layer comprises the following components in parts by weight:
100 parts of phenolic resin, 15 parts of alumina, 12 parts of mica powder, 9 parts of terephthalic acid ester coated scandium silicate/yttrium silicate microspheres, 4 parts of polyvinyl alcohol, 0.5 part of pentaerythritol stearate and 4 parts of diethyl carbonate.
The particle size of the alumina is 20-60 meshes, the particle size of the mica powder is 60-120 meshes, the particle size of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres is 800-1000 meshes, and the average molecular weight of the polyvinyl alcohol is 10000-30000.
The preparation method of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres comprises the following steps:
(1) Preparing nano scandium silicate/yttrium silicate:
s1, weighing tetraethoxysilane and mixing with an ethanol solution, after uniform dispersion, dropwise adding a mixed solution of scandium chloride and yttrium chloride while stirring, and after dropwise adding, continuously stirring for 8 hours to obtain a scandium silicate/yttrium silicate precursor;
wherein the mass fraction of the ethanol solution is 45 percent; the mixed solution of scandium chloride and yttrium chloride is obtained by mixing scandium chloride, yttrium chloride and deionized water according to the mass ratio of 1; the mass ratio of the ethyl orthosilicate and the ethanol solution to the mixed solution of scandium chloride and yttrium chloride is 1.4;
s2, drying the scandium silicate/yttrium silicate precursor under reduced pressure, then placing the scandium silicate/yttrium silicate precursor in a reaction furnace, heating to 1000 ℃, performing heat preservation treatment for 2 hours, heating to 1350 ℃ again, performing heat preservation treatment for 3 hours, naturally cooling to room temperature, and performing ball milling to obtain nano scandium silicate/yttrium silicate with the particle size of 300-600 nm;
(2) Hydroxylated scandium silicate/yttrium silicate:
weighing 3- [ bis (2-hydroxyethyl) amino ] propane triethoxysilane, mixing with deionized water, dispersing uniformly, adding nano scandium silicate/yttrium silicate, heating to 60 ℃, stirring for 8h, centrifuging, washing the obtained lower layer solid with pure water for three times, and drying under reduced pressure to obtain hydroxylated scandium silicate/yttrium silicate;
wherein the mass ratio of the nano scandium silicate/yttrium silicate to the aminopropyl triethoxysilane to the deionized water is 1;
(3) Preparing terephthalate-coated scandium silicate/yttrium silicate microspheres:
dispersing hydroxylated scandium silicate/yttrium silicate into N, N-dimethylformamide, adding terephthalic acid and phosphotungstic acid, heating to 130 ℃, stirring for 5 hours, filtering, washing and drying obtained filter residues to obtain terephthalic acid ester coated scandium silicate/yttrium silicate microspheres;
wherein the mass ratio of the hydroxylated scandium silicate/yttrium silicate to the terephthalic acid, the phosphotungstic acid to the N, N-dimethylformamide is 1.
The preparation method of the energy-saving heat-resistant anti-corrosion high-voltage tube bus comprises the following steps:
step 1, weighing phenolic resin according to parts by weight, mixing the phenolic resin with polyvinyl alcohol, adding terephthalate coated scandium silicate/yttrium silicate microspheres after uniform dispersion, heating to 60 ℃, stirring and mixing for 2 hours, and cooling to room temperature to obtain a phenolic resin mixture;
step 2, weighing aluminum oxide and mica powder according to parts by weight, mixing the aluminum oxide and the mica powder into a phenolic resin mixture, stirring and mixing uniformly, then adding diethyl carbonate weighed according to parts by weight, and mixing uniformly again to obtain a phenolic resin grouting material;
step 3, coating a release agent in the casting mold, placing the high-pressure pipe bus cleaned by using ethanol or acetone in the casting mold, and injecting the phenolic resin grouting material into the casting mold to enable the phenolic resin grouting material to completely wrap the high-pressure pipe bus;
and 4, placing the cast mould in a closed box, firstly carrying out heat preservation and pressure maintenance treatment for 10min at the temperature of 150 ℃ and the pressure of 20MPa, then reducing the pressure to normal pressure, continuing heat preservation treatment for 5h, and demoulding to obtain the energy-saving heat-resistant anti-corrosion high-pressure pipe bus.
Example 2
An energy-saving heat-resistant anti-corrosion high-voltage tube bus comprises a high-voltage tube bus body and a heat-resistant anticorrosive layer arranged on the surface of the high-voltage tube bus body; the bus body is a copper clad aluminum bus, and the thickness of the heat-resistant anticorrosive coating is 20mm.
The heat-resistant anticorrosive layer comprises the following components in parts by weight:
100 parts of phenolic resin, 12 parts of alumina, 10 parts of mica powder, 7 parts of terephthalic acid ester coated scandium silicate/yttrium silicate microspheres, 2 parts of polyvinyl alcohol, 0.5 part of pentaerythritol stearate and 3 parts of diethyl carbonate.
The particle size of the alumina is 20-60 meshes, the particle size of the mica powder is 60-120 meshes, the particle size of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres is 800-1000 meshes, and the average molecular weight of the polyvinyl alcohol is 10000-30000.
The preparation method of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres comprises the following steps:
(1) Preparing nano scandium silicate/yttrium silicate:
s1, weighing tetraethoxysilane and mixing with an ethanol solution, after uniform dispersion, dropwise adding a mixed solution of scandium chloride and yttrium chloride while stirring, and after dropwise adding, continuously stirring for 6 hours to obtain a scandium silicate/yttrium silicate precursor;
wherein the mass fraction of the ethanol solution is 35 percent; the mixed solution of scandium chloride and yttrium chloride is obtained by mixing scandium chloride, yttrium chloride and deionized water according to the mass ratio of 1; the mass ratio of the ethyl orthosilicate and the ethanol solution to the mixed solution of scandium chloride and yttrium chloride is 1.2;
s2, carrying out reduced pressure drying on the scandium silicate/yttrium silicate precursor, then placing the scandium silicate/yttrium silicate precursor in a reaction furnace, heating to 900 ℃, carrying out heat preservation treatment for 1h, then heating to 1250 ℃, carrying out heat preservation treatment for 2h, naturally cooling to room temperature, and then carrying out ball milling to obtain nano scandium silicate/yttrium silicate with the particle size of 300-600 nm;
(2) Hydroxylated scandium silicate/yttrium silicate:
weighing 3- [ bis (2-hydroxyethyl) amino ] propane triethoxysilane, mixing with deionized water, uniformly dispersing, adding nano scandium silicate/yttrium silicate, heating to 55 ℃, stirring for 5h, centrifuging, washing the obtained lower layer solid with pure water for three times, and drying under reduced pressure to obtain hydroxylated scandium silicate/yttrium silicate;
wherein the mass ratio of the nano scandium silicate/yttrium silicate to the aminopropyl triethoxysilane to the deionized water is 1;
(3) Preparing terephthalate-coated scandium silicate/yttrium silicate microspheres:
dispersing hydroxylated scandium silicate/yttrium silicate into N, N-dimethylformamide, adding terephthalic acid and phosphotungstic acid, heating to 120 ℃, stirring for 4 hours, filtering, washing and drying obtained filter residues to obtain terephthalic acid ester coated scandium silicate/yttrium silicate microspheres;
wherein the mass ratio of the hydroxylated scandium silicate to the yttrium silicate to the terephthalic acid to the phosphotungstic acid to the N, N-dimethylformamide is 1.
The preparation method of the energy-saving heat-resistant anti-corrosion high-voltage tube bus comprises the following steps:
step 1, weighing phenolic resin according to parts by weight, mixing the phenolic resin with polyvinyl alcohol, adding terephthalate coated scandium silicate/yttrium silicate microspheres after uniform dispersion, heating to 55 ℃, stirring and mixing for 1h, and cooling to room temperature to obtain a phenolic resin mixture;
step 2, weighing aluminum oxide and mica powder according to parts by weight, mixing the aluminum oxide and the mica powder into a phenolic resin mixture, stirring and mixing uniformly, then adding diethyl carbonate weighed according to parts by weight, and mixing uniformly again to obtain a phenolic resin grouting material;
step 3, coating a release agent in the casting mould, placing the high-pressure pipe bus cleaned by using ethanol or acetone in the casting mould, and injecting the phenolic resin grouting material into the casting mould so that the phenolic resin grouting material completely wraps the high-pressure pipe bus;
and 4, placing the cast mould in a closed box, firstly carrying out heat preservation and pressure maintenance treatment for 5min at the temperature of 140 ℃ and the pressure of 15MPa, then reducing the pressure to normal pressure, continuing heat preservation treatment for 3h, and demoulding to obtain the energy-saving heat-resistant anti-corrosion high-pressure pipe bus.
Example 3
An energy-saving heat-resistant anti-corrosion high-voltage tube bus comprises a high-voltage tube bus body and a heat-resistant anticorrosive layer arranged on the surface of the high-voltage tube bus body; the bus body is a copper clad aluminum bus, and the thickness of the heat-resistant anticorrosive coating is 30mm.
The heat-resistant anticorrosive layer comprises the following components in parts by weight:
100 parts of phenolic resin, 18 parts of alumina, 15 parts of mica powder, 12 parts of terephthalic acid ester coated scandium silicate/yttrium silicate microspheres, 6 parts of polyvinyl alcohol, 1 part of pentaerythritol stearate and 5 parts of diethyl carbonate.
The particle size of the alumina is 20-60 meshes, the particle size of the mica powder is 60-120 meshes, the particle size of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres is 800-1000 meshes, and the average molecular weight of the polyvinyl alcohol is 10000-30000.
The preparation method of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres comprises the following steps:
(1) Preparing nano scandium silicate/yttrium silicate:
s1, weighing ethyl orthosilicate, mixing the ethyl orthosilicate with an ethanol solution, uniformly dispersing, dropwise adding a mixed solution of scandium chloride and yttrium chloride while stirring, and continuously stirring for 10 hours after dropwise adding is finished to obtain a scandium silicate/yttrium silicate precursor;
wherein the mass fraction of the ethanol solution is 55%; the mixed solution of scandium chloride and yttrium chloride is obtained by mixing scandium chloride, yttrium chloride and deionized water according to the mass ratio of 1; the mass ratio of the ethyl orthosilicate and the ethanol solution to the mixed solution of scandium chloride and yttrium chloride is 1.6;
s2, carrying out reduced pressure drying on the scandium silicate/yttrium silicate precursor, then placing the scandium silicate/yttrium silicate precursor in a reaction furnace, heating to 1000 ℃, carrying out heat preservation treatment for 3 hours, then heating to 1400 ℃, carrying out heat preservation treatment for 4 hours, naturally cooling to room temperature, and carrying out ball milling to obtain nano scandium silicate/yttrium silicate with the particle size of 300-600 nm;
(2) Hydroxylated scandium silicate/yttrium silicate:
weighing 3- [ bis (2-hydroxyethyl) amino ] propane triethoxysilane, mixing with deionized water, dispersing uniformly, adding nano scandium silicate/yttrium silicate, heating to 65 ℃, stirring for 10h, centrifuging, washing the obtained lower layer solid with pure water for three times, and drying under reduced pressure to obtain hydroxylated scandium silicate/yttrium silicate;
wherein the mass ratio of the nano scandium silicate/yttrium silicate to the aminopropyl triethoxysilane to the deionized water is 1;
(3) Preparing terephthalate-coated scandium silicate/yttrium silicate microspheres:
dispersing hydroxylated scandium silicate/yttrium silicate into N, N-dimethylformamide, adding terephthalic acid and phosphotungstic acid, heating to 140 ℃, stirring for 6 hours, filtering, washing and drying obtained filter residues to obtain terephthalic acid ester coated scandium silicate/yttrium silicate microspheres;
wherein the mass ratio of the hydroxylated scandium silicate to the yttrium silicate to the terephthalic acid to the phosphotungstic acid to the N, N-dimethylformamide is 1.
The preparation method of the energy-saving heat-resistant anti-corrosion high-voltage tube bus comprises the following steps:
step 1, weighing phenolic resin according to parts by weight, mixing the phenolic resin with polyvinyl alcohol, adding terephthalate coated scandium silicate/yttrium silicate microspheres after uniform dispersion, heating to 65 ℃, stirring and mixing for 3 hours, and cooling to room temperature to obtain a phenolic resin mixture;
step 2, weighing aluminum oxide and mica powder according to parts by weight, mixing the aluminum oxide and the mica powder into a phenolic resin mixture, stirring and mixing uniformly, then adding diethyl carbonate weighed according to parts by weight, and mixing uniformly again to obtain a phenolic resin grouting material;
step 3, coating a release agent in the casting mold, placing the high-pressure pipe bus cleaned by using ethanol or acetone in the casting mold, and injecting the phenolic resin grouting material into the casting mold to enable the phenolic resin grouting material to completely wrap the high-pressure pipe bus;
and 4, placing the cast mould in a closed box, firstly carrying out heat preservation and pressure maintenance treatment for 10min at the temperature of 150 ℃ and the pressure of 20MPa, then reducing the pressure to normal pressure, continuing heat preservation treatment for 6h, and demoulding to obtain the energy-saving heat-resistant anti-corrosion high-pressure pipe bus.
Comparative example 1
A heat-resistant anticorrosive layer, prepared in the same manner as in example 1 except that:
the heat-resistant anticorrosive layer comprises the following components in parts by weight:
100 parts of phenolic resin, 15 parts of alumina, 12 parts of mica powder, 9 parts of dimethyl terephthalate, 4 parts of polyvinyl alcohol, 0.5 part of pentaerythritol stearate and 4 parts of diethyl carbonate.
Comparative example 2
A heat-resistant anticorrosive layer, prepared in the same manner as in example 1 except that:
the heat-resistant anticorrosive layer comprises the following components in parts by weight:
100 parts of phenolic resin, 15 parts of alumina, 12 parts of mica powder, 9 parts of nano scandium silicate/yttrium silicate, 4 parts of polyvinyl alcohol, 0.5 part of pentaerythritol stearate and 4 parts of diethyl carbonate.
In order to more clearly illustrate the invention, the heat-resistant anticorrosive layers prepared in the examples 1 to 3 and the comparative examples 1 to 2 of the invention are subjected to detection and comparison on the performance, the tensile strength is detected according to the standard ASTM D638-2014, and the impact strength is detected according to the standard GB/T1843-2008; the high temperature resistance is tested using the standard GB 1035-1970 (Martin test); flame retardancy is classified according to the UL94 flame retardancy rating; and the acid corrosion resistance is detected for 24 hours by placing the film in a sulfuric acid solution with the concentration of 10%, and the alkali corrosion resistance is detected for 24 hours by placing the film in a sodium hydroxide solution with the concentration of 10%, and whether the surface is corroded is observed. The results are shown in table 1 below:
TABLE 1 comparison of the Properties of different inorganic mineral insulating layers
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | |
| Tensile Strength (MPa) | 77.5 | 73.4 | 77.9 | 64.3 | 57.1 |
| Impact Strength (MPa) | 23.6 | 21.2 | 24.7 | 18.9 | 15.4 |
| High temperature resistance (DEG C) | ＞250 | ＞250 | ＞250 | ＜200 | ＜200 |
| Thermal conductivity (W/(m.K)) | 1.12 | 1.05 | 1.14 | 0.53 | 0.87 |
| Flame retardancy (grade) | V-0 | V-0 | V-0 | V-0 | V-0 |
| Resistance to acid corrosion | Without obvious change | Without obvious change | Without obvious change | Without obvious change | Without obvious change |
| Resistance to alkali corrosion | Without obvious change | Without obvious change | Without obvious change | About 10% corrosion rate | About 5% corrosion rate |
In table 1 above, examples 1 to 3 of the present invention have excellent tensile strength, impact strength and flame retardancy, can resist high temperature of more than 250 ℃, have a thermal conductivity of 1.12W/(m · K), and have good acid corrosion resistance and alkali corrosion resistance. While comparative example 1 may be less effective in terms of a large variation in system formulation, comparative example 2 may be less effective in terms of a reduction in system performance due to uneven dispersion.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. An energy-saving heat-resistant anti-corrosion high-voltage tube bus is characterized by comprising a high-voltage tube bus body and a heat-resistant anti-corrosion layer arranged on the surface of the high-voltage tube bus body; the heat-resistant anticorrosive layer comprises the following components in parts by weight:
100 parts of phenolic resin, 12-18 parts of alumina, 10-15 parts of mica powder, 7-12 parts of terephthalic acid ester coated scandium silicate/yttrium silicate microspheres, 2-6 parts of polyvinyl alcohol, 0.5-1 part of pentaerythritol stearate and 3-5 parts of diethyl carbonate;
the preparation method of the terephthalic acid ester coated scandium silicate/yttrium silicate microspheres comprises the following steps:
(1) Preparing nano scandium silicate/yttrium silicate:
s1, weighing ethyl orthosilicate, mixing the ethyl orthosilicate with an ethanol solution, dispersing the ethyl orthosilicate and the ethanol solution uniformly, dropwise adding a mixed solution of scandium chloride and yttrium chloride while stirring, and continuously stirring for 6-10 hours after dropwise adding is finished to obtain a scandium silicate/yttrium silicate precursor;
wherein the mass fraction of the ethanol solution is 35-55%; the mixed solution of scandium chloride and yttrium chloride is obtained by mixing scandium chloride, yttrium chloride and deionized water according to the mass ratio of 1; the mass ratio of the ethyl orthosilicate and the ethanol solution to the mixed solution of scandium chloride and yttrium chloride is 1.2-1.6;
s2, drying the scandium silicate/yttrium silicate precursor under reduced pressure, then placing the scandium silicate/yttrium silicate precursor in a reaction furnace, heating to 900-1000 ℃, performing heat preservation treatment for 1-3 h, then heating to 1250-1400 ℃ again, performing heat preservation treatment for 2-4 h, naturally cooling to room temperature, and performing ball milling to obtain nano scandium silicate/yttrium silicate particles;
(2) Hydroxylated scandium silicate/yttrium silicate:
weighing 3- [ bis (2-hydroxyethyl) amino ] propane triethoxysilane, mixing with deionized water, dispersing uniformly, adding nano scandium silicate/yttrium silicate, heating to 55-65 ℃, stirring for 5-10 h, centrifuging, washing the obtained lower layer solid with pure water for three times, and drying under reduced pressure to obtain hydroxylated scandium silicate/yttrium silicate;
wherein the mass ratio of the nano scandium silicate/yttrium silicate to the aminopropyl triethoxysilane to the deionized water is 1;
(3) Preparing terephthalate coated scandium silicate/yttrium silicate microspheres:
dispersing hydroxylated scandium silicate/yttrium silicate into N, N-dimethylformamide, adding terephthalic acid and phosphotungstic acid, heating to 120-140 ℃, stirring for 4-6 h, filtering, washing and drying obtained filter residues to obtain scandium silicate/yttrium silicate microspheres coated with terephthalate;
wherein the mass ratio of the hydroxylated scandium silicate/yttrium silicate to the terephthalic acid to the phosphotungstic acid to the N, N-dimethylformamide is 1;
the preparation method of the energy-saving heat-resistant anti-corrosion high-voltage tube bus comprises the following steps:
step 1, weighing phenolic resin according to parts by weight, mixing the phenolic resin with polyvinyl alcohol, uniformly dispersing, adding terephthalic acid ester coated scandium silicate/yttrium silicate microspheres, heating to 55-65 ℃, stirring and mixing for 1-3 hours, and cooling to room temperature to obtain a phenolic resin mixture;
step 2, weighing aluminum oxide and mica powder according to parts by weight, mixing the aluminum oxide and the mica powder into a phenolic resin mixture, stirring and mixing uniformly, then adding diethyl carbonate weighed according to parts by weight, and mixing uniformly again to obtain a phenolic resin grouting material;
step 3, cleaning the high-voltage tube bus, placing the cleaned high-voltage tube bus in a casting mold, and injecting the phenolic resin grouting material into the casting mold to enable the phenolic resin grouting material to completely wrap the high-voltage tube bus;
and 4, placing the poured mould in a closed box for curing, and obtaining the energy-saving heat-resistant corrosion-resistant high-voltage tube bus after demoulding.
2. The energy-saving heat-resistant corrosion-resistant high-voltage tube bus bar as recited in claim 1, wherein the bus bar body is a copper-clad aluminum bus bar.
3. The energy-saving heat-resistant corrosion-resistant high-voltage tube bus bar as claimed in claim 1, wherein the particle size of the alumina is 20-60 meshes, and the particle size of the mica powder is 60-120 meshes.
4. The energy-saving heat-resistant corrosion-resistant high-voltage pipe bus bar as claimed in claim 1, wherein the particle size of the terephthalate-coated scandium silicate/yttrium silicate microspheres is 800-1000 mesh.
5. The energy-saving heat-resistant corrosion-resistant high-voltage tubular busbar according to claim 1, wherein the polyvinyl alcohol has an average molecular weight of 10000 to 30000.
6. The energy-saving heat-resistant corrosion-resistant high-voltage pipe bus bar according to claim 1, wherein the thickness of the heat-resistant corrosion-resistant layer is 20-30 mm.
7. The energy-saving heat-resistant corrosion-resistant high-voltage pipe busbar according to claim 1, wherein ethanol or acetone is used for cleaning the high-voltage pipe busbar in the step 3, and a release agent is coated inside a casting mold, and then the high-voltage pipe busbar is placed and grouted.
8. The energy-saving heat-resistant corrosion-resistant high-voltage tubular busbar according to claim 1, wherein in the step 4, the curing conditions are as follows: firstly, preserving heat and pressure for 5-10 min under the conditions that the temperature is 140-150 ℃ and the pressure is 15-20 MPa, then reducing the pressure to normal pressure and continuing preserving heat for 3-6 h.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103421427A (en) * | 2013-08-22 | 2013-12-04 | 欧美龙（南通）重防腐涂料有限公司 | Anticorrosion phenol-formaldehyde resin compressive coating |
| CN108912598A (en) * | 2018-06-06 | 2018-11-30 | 荣马电器有限公司 | A kind of anti-short-circuit enclosed busbar |
| CN109355008A (en) * | 2018-09-10 | 2019-02-19 | 镇江朝阳机电科技有限公司 | A kind of high-voltage insulated bus and coating process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002275347A (en) * | 2001-03-19 | 2002-09-25 | Sumitomo Bakelite Co Ltd | Phenol resin molding material |
| JP2014058628A (en) * | 2012-09-19 | 2014-04-03 | Sumitomo Bakelite Co Ltd | Phenolic molding compound, formed part and electric/electronic component |
| CN108276866A (en) * | 2018-01-16 | 2018-07-13 | 湖南国盛石墨科技有限公司 | A kind of metal material graphene fire-resistant anticorrosion paint and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421427A (en) * | 2013-08-22 | 2013-12-04 | 欧美龙（南通）重防腐涂料有限公司 | Anticorrosion phenol-formaldehyde resin compressive coating |
| CN108912598A (en) * | 2018-06-06 | 2018-11-30 | 荣马电器有限公司 | A kind of anti-short-circuit enclosed busbar |
| CN109355008A (en) * | 2018-09-10 | 2019-02-19 | 镇江朝阳机电科技有限公司 | A kind of high-voltage insulated bus and coating process |
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