CN115558239A - Hard material of insulator, preparation method and composite series insulator - Google Patents
Hard material of insulator, preparation method and composite series insulator Download PDFInfo
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- CN115558239A CN115558239A CN202211221260.2A CN202211221260A CN115558239A CN 115558239 A CN115558239 A CN 115558239A CN 202211221260 A CN202211221260 A CN 202211221260A CN 115558239 A CN115558239 A CN 115558239A
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- 239000012212 insulator Substances 0.000 title claims abstract description 136
- 239000002131 composite material Substances 0.000 title claims abstract description 94
- 239000000463 material Substances 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 54
- 239000003822 epoxy resin Substances 0.000 claims abstract description 37
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 16
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 16
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 15
- 239000004945 silicone rubber Substances 0.000 claims abstract description 12
- 239000012745 toughening agent Substances 0.000 claims abstract description 11
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 10
- 239000003063 flame retardant Substances 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 7
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 claims description 14
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 14
- 229920000570 polyether Polymers 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 12
- 239000002202 Polyethylene glycol Substances 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 7
- 229920001223 polyethylene glycol Polymers 0.000 claims description 7
- 229920001451 polypropylene glycol Polymers 0.000 claims description 7
- YXALYBMHAYZKAP-UHFFFAOYSA-N 7-oxabicyclo[4.1.0]heptan-4-ylmethyl 7-oxabicyclo[4.1.0]heptane-4-carboxylate Chemical compound C1CC2OC2CC1C(=O)OCC1CC2OC2CC1 YXALYBMHAYZKAP-UHFFFAOYSA-N 0.000 claims description 6
- XFUOBHWPTSIEOV-UHFFFAOYSA-N bis(oxiran-2-ylmethyl) cyclohexane-1,2-dicarboxylate Chemical compound C1CCCC(C(=O)OCC2OC2)C1C(=O)OCC1CO1 XFUOBHWPTSIEOV-UHFFFAOYSA-N 0.000 claims description 6
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical class C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 6
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 6
- 239000010931 gold Substances 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 229920005862 polyol Polymers 0.000 claims description 6
- 150000003077 polyols Chemical class 0.000 claims description 6
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 4
- DJUWPHRCMMMSCV-UHFFFAOYSA-N bis(7-oxabicyclo[4.1.0]heptan-4-ylmethyl) hexanedioate Chemical compound C1CC2OC2CC1COC(=O)CCCCC(=O)OCC1CC2OC2CC1 DJUWPHRCMMMSCV-UHFFFAOYSA-N 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 208000005156 Dehydration Diseases 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- OXQXGKNECHBVMO-UHFFFAOYSA-N 7-oxabicyclo[4.1.0]heptane-4-carboxylic acid Chemical compound C1C(C(=O)O)CCC2OC21 OXQXGKNECHBVMO-UHFFFAOYSA-N 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000010292 electrical insulation Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000007774 longterm Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- KYUGRJLPPCDMOH-UHFFFAOYSA-N 6-(7-oxabicyclo[4.1.0]heptan-3-ylmethoxy)-6-oxohexanoic acid Chemical compound C1C(COC(=O)CCCCC(=O)O)CCC2OC21 KYUGRJLPPCDMOH-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- 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
Abstract
The invention discloses a hard material of an insulator, a preparation method and a composite serial insulator, wherein the hard material is an epoxy resin material; the epoxy resin material comprises epoxy resin, a curing agent, a toughening agent, an accelerant, a flame retardant, a silane coupling agent, silicon dioxide and an aluminum hydroxide filler. The composite serial insulator comprises a silicon rubber composite insulator and a hard composite insulator. The silicone rubber composite insulator and the hard composite insulator are connected together in series. The hard material of the invention keeps the performances of heat resistance, electrical insulation, hardness and the like of the whole material, and also gives consideration to the performances of hydrophobicity, mechanical impact resistance, flexibility and the like. The hard composite insulator and the silicon rubber composite insulator which adopt the material adopt a series combination mode, thereby fundamentally solving the problems that the traditional silicon rubber material is weak and cannot resist bird pecking, and the traditional hard material has unstable hydrophobicity and insufficient flexibility.
Description
Technical Field
The invention belongs to the technical field of insulators, and particularly relates to a hard material of an insulator, a preparation method of the hard material and a composite serial insulator.
Background
With the rapid development of power grids, the scale of power transmission lines is gradually increased, composite insulators are widely applied and are the most common external insulation equipment for power transmission line stringing, however, the currently common silicon rubber composite insulators have defects in the aspects of mechanical property, aging resistance and interface property, the local damage, aging and hydrophobicity reduction of the insulators caused by weak material property of the insulators sometimes occur, and after acid liquor generated by long-term operation humid atmosphere discharge invades glass fibers of the core rod, the core rod has the risk of local heating, even brittle failure and brittle failure. With the improvement of hard materials, the hard materials are comprehensively superior to silicon rubber materials in the aspects of mechanical properties, ageing resistance, interface properties and water penetration resistance, and can effectively improve the long-term running weather resistance of the insulator, but due to process limitations, the current hard materials are mainly applied to insulators with voltage levels of 110kV and below, circuits with voltage levels of 110kV and above do not have composite insulators made of similar materials, and the silicon rubber composite insulators commonly used in the circuits are easily pecked by birds, so that the umbrella skirt or the sheath of the insulator is damaged, the sealing is damaged, the safe running of the circuit is affected, and in order to solve the problem that the protection performance of the insulators of the high-voltage-level circuits is not enough, various composite series insulators are designed, the long-term running weather resistance of the insulator is improved, the insulators are effectively protected by bird pecking, and meanwhile, the accidents of crisp breakage, brittle breakage and the like caused by local heating of the insulators are reduced.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a hard material of an insulator, a preparation method and a composite serial insulator.
The invention adopts the following technical scheme:
the hard material of the insulator is an epoxy resin material; the epoxy resin material comprises epoxy resin, a curing agent, a toughening agent, an accelerant, a flame retardant, a silane coupling agent, silicon dioxide and an aluminum hydroxide filler.
In a preferred embodiment of the present invention, the epoxy resin is composed of a material a and a material B.
In a preferred embodiment of the present invention, the proportion of the material a is 60% to 90%, and the proportion of the material B is 10% to 40%.
In a preferred embodiment of the present invention, the epoxy resin accounts for 33% by weight, the curing agent accounts for 28% by weight, the toughening agent accounts for 2% by weight, the accelerator accounts for 1% by weight, the flame retardant accounts for 1% by weight, the silane coupling agent accounts for 1% by weight, the silica accounts for 16% by weight, and the aluminum hydroxide filler accounts for 18% by weight.
As a preferred embodiment of the present invention, the A material is a combination of 3,4-epoxycyclohexylcarboxylic acid-3 ',4' -epoxycyclohexylmethyl ester, bis ((3,4-epoxycyclohexyl) methyl) adipate, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylformate and caprolactone polymerized product, cyclohexane-1,2-dicarboxylic acid diglycidyl ester, hydrogenated bisphenol A epoxy resin.
As a preferred embodiment of the present invention, the molar ratio of 3,4-epoxycyclohexylcarboxylic acid-3 ',4' -epoxycyclohexylmethyl ester, bis ((3,4-epoxycyclohexylmethyl) adipate, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylformate and caprolactone, cyclohexane-1,2-dicarboxylic acid diglycidyl ester, hydrogenated bisphenol a epoxy resin is 1.
In a preferred embodiment of the present invention, the material B is a combination of polyether polyol, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, and epoxy-terminated polyether.
As a preferred embodiment of the present invention, the molar ratio of polyether polyol, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, and epoxy-terminated polyether is about 2.
A method for preparing a hard material for an insulator, said method being used for preparing a hard material as described above.
As a preferred embodiment of the present invention, the preparation method comprises the steps of:
step 1, respectively carrying out preheating treatment on epoxy resin, a curing agent, silicon dioxide and aluminum hydroxide, then carrying out dehydration treatment for 1-3 hours, removing moisture, gas and volatile substances in the epoxy resin, the curing agent, the silicon dioxide and the aluminum hydroxide, wherein the preheating temperature is 80-120 ℃, and cooling the components to normal temperature after the preheating treatment;
step 2, mixing the epoxy resin, the curing agent, the toughening agent and the accelerant in proportion, stirring for 15-30 min to be uniform, controlling the temperature to be 20-40 ℃ during stirring, and keeping the relative humidity below 60 percent RH;
step 3, sequentially adding the silane coupling agent, the flame retardant, the aluminum hydroxide and the silicon dioxide according to the proportion, and stirring for 15-30 min until the components are uniformly mixed before adding each component;
and 4, stirring and degassing the mixture for 40-60 min.
A composite serial insulator comprises a silicon rubber composite insulator and a hard composite insulator, wherein the hard material of the hard composite insulator is made of the hard material.
In a preferred embodiment of the present invention, the silicone rubber composite insulator and the hard composite insulator are connected in series.
In a preferred embodiment of the present invention, the silicone rubber composite insulator includes a first mandrel, a silicone rubber sheath, a first shed, a first metal fitting, and a first grading ring.
As a preferred embodiment of the present invention, the first mandrel is located at a center position of the silicone rubber composite insulator, and is made of glass fiber and epoxy resin, a silicone rubber sheath is wrapped around the first mandrel, a first shed is arranged outside the silicone rubber sheath, the first shed is a silicone rubber shed, the first hardware is located at two ends of the first mandrel, and the first grading ring is arranged outside the first hardware and is made of metal.
In a preferred embodiment of the present invention, the hard composite insulator includes a second core rod, a hard sheath, a second shed, a second metal, and a second grading ring.
In a preferred embodiment of the present invention, the second mandrel is located at a central position of the hard composite insulator and is made of glass fiber and epoxy resin, the hard sheath is wrapped around the first mandrel, a second shed is arranged outside the hard sheath, the second shed is one of a silicon rubber shed and a hard shed, the second metal fittings are located at two ends of the second mandrel, and the second grading rings are arranged outside the second metal fittings and are made of metal.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention discloses an epoxy resin in a hard material and a preparation method of the hard material, wherein the material A is a main material of the hard material and keeps good heat resistance, electrical insulation, hardness and other properties of the whole material;
(2) According to the invention, a mode of serially combining the silicon rubber composite insulator and the hard composite insulator is adopted, because the insulator is mainly at the end part under the damage of bird pecking and the like, the hard composite insulator is arranged at the end part of the silicon rubber composite insulator, based on the advantages of hard materials with greatly improved mechanical flexibility and hydrophobicity and the advantages of traditional silicon rubber materials, the requirements of the composite insulator on heat resistance, insulating property, hydrophobic property and pollution flashover resistance are met, the requirements of the composite insulator on high strength and bird pecking resistance are also met, the organic unification of hardness, mechanical impact resistance, hydrophobicity and tear resistance of a sheath is realized in the aspect of the performance of the composite insulator, the problems that the traditional silicon rubber material is weak and cannot resist bird pecking, the traditional hard material is unstable in hydrophobicity and insufficient in flexibility are fundamentally solved, and the serial connection mode is adopted, so that the composite insulator is suitable for various voltage grades, besides the bird pecking resistance performance is excellent, the problems of local heating, rotten and breaking after long-term operation can be effectively avoided, and the weather resistance of the composite insulator can be effectively improved;
(3) The invention has the hard composite insulator combined by various silicon rubber materials and hard materials and the structural form of the combination of various silicon rubber composite insulators and the hard composite insulator, and can use composite series insulators with different combination forms according to the requirements of different environments.
Drawings
Fig. 1 is a schematic structural view of a silicone rubber composite insulator and a hard composite insulator of the present invention;
fig. 2 is a schematic view of a first structure of a composite series insulator according to the present invention;
fig. 3 is a schematic view of a second structure of a composite series insulator according to the present invention;
fig. 4 is a schematic view of a third structure of a composite series insulator according to the present invention;
fig. 5 is a schematic view of a fourth structure of a composite series insulator according to the present invention;
fig. 6 is a schematic view of a fifth structure of a composite series insulator according to the present invention;
fig. 7 is a schematic view of a sixth structure of a composite series insulator according to the present invention;
in the figure:
1-a first mandrel; 2-a silicone rubber sheath; 3-a first shed; 4-a first hardware fitting; 5-a first grading ring; 6-a second mandrel; 7-hard sheath; 8-a second shed; 9-a second hardware fitting; 10-a second grading ring.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Example one
The hard material of the insulator is an epoxy resin material, and the epoxy resin material comprises epoxy resin, a curing agent, a toughening agent, an accelerant, a flame retardant, a silane coupling agent, silicon dioxide and an aluminum hydroxide filler.
According to the weight, the epoxy resin accounts for 33 percent, the curing agent accounts for 28 percent, the toughening agent accounts for 2 percent, the accelerating agent accounts for 1 percent, the flame retardant accounts for 1 percent, the silane coupling agent accounts for 1 percent, the silicon dioxide accounts for 16 percent, and the aluminum hydroxide filler accounts for 18 percent.
The epoxy resin consists of a material A and a material B, wherein the material A accounts for 60-90%, and the material B accounts for 10-40%.
The material A is a combination of 3,4-epoxycyclohexylformic acid-3 ',4' -epoxycyclohexylmethyl ester, bis ((3,4-epoxycyclohexyl) methyl) adipate, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylformate and caprolactone, cyclohexane-1,2-dicarboxylic acid diglycidyl ester, hydrogenated bisphenol A epoxy resin.
3,4-epoxycyclohexylcarboxylic acid-3 ',4' -epoxycyclohexylmethyl ester, bis ((3,4-epoxycyclohexylmethyl) adipate, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylformate and caprolactone, cyclohexane-1,2-dicarboxylic acid diglycidyl ester, hydrogenated bisphenol a epoxy resin in a 1. The material A has better uniformity and higher glass transition temperature.
The material B is the combination of polyether polyol, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether and epoxy-terminated polyether.
The molar ratio of polyether polyol, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, epoxy-terminated polyether is about 2.
The polyurethane adhesive prepared from the polyether resin has good water resistance, impact resistance and low temperature resistance. Epoxy resins have poor flexibility of molecular chains and high viscosity of resins due to the presence of benzene rings with high rigidity on the molecular chains. When the curing agent is applied, more low-molecular-weight reactive diluent is required to be added to meet the construction viscosity and rheological property, and the flexibility can be effectively improved by adding polyethylene glycol diglycidyl ether and polypropylene glycol diglycidyl ether into the curing agent. The epoxy polyether can be used as an epoxy resin toughening agent, and can be added into epoxy resin taking organic amine as a curing agent, so that the toughness of the epoxy resin can be remarkably improved, and the transparency of a cured epoxy resin can be maintained.
Example two
A preparation method of a hard material of an insulator is used for preparing the hard material and comprises the following steps:
step 1, respectively carrying out preheating treatment on epoxy resin, a curing agent, silicon dioxide and aluminum hydroxide, then carrying out dehydration treatment for 1-3 hours, removing moisture, gas and volatile substances in the epoxy resin, the curing agent, the silicon dioxide and the aluminum hydroxide, wherein the preheating temperature is 80-120 ℃, and cooling all components to normal temperature after the preheating treatment is finished;
step 2, mixing the epoxy resin, the curing agent, the toughening agent and the accelerator in proportion, stirring for 15-30 min until the mixture is uniform, controlling the temperature between 20-40 ℃ during stirring, and keeping the relative humidity below 60 percent RH;
step 3, sequentially adding the silane coupling agent, the flame retardant, the aluminum hydroxide and the silicon dioxide according to the proportion, and stirring for 15-30 min until the components are uniformly mixed before adding one component;
and 4, stirring and degassing the mixture for 40-60 min.
EXAMPLE III
A composite serial insulator is shown in figure 1 and comprises a silicon rubber composite insulator and a hard composite insulator, wherein the hard material of the hard composite insulator is made of the hard material.
As shown in fig. 2 to 7, the silicone rubber composite insulator and the hard composite insulator are connected in series.
The silicon rubber composite insulator comprises a first core rod 1, a silicon rubber sheath 2, a first umbrella skirt 3, a first hardware fitting 4 and a first grading ring 5.
First plug 1 is located silicon rubber composite insulator's central point and puts, is made by glass fiber and epoxy material, and the outside parcel of first plug 1 has silicon rubber sheath 2, and the outside of silicon rubber sheath 2 is provided with first full skirt 3, and first full skirt 3 is the silicon rubber full skirt, first gold utensil 4 is located the both ends of first plug 1, first equalizer ring 5 sets up in the outside of first gold utensil 4, adopts the metal material.
The hard composite insulator comprises a second core rod 6, a hard sheath 7, a second umbrella skirt 8, a second hardware fitting 9 and a second grading ring 10.
The second core rod 6 is located the central point of stereoplasm composite insulator and is made by glass fiber and epoxy material, and the outside parcel of first core rod 6 has stereoplasm sheath 7, and the outside of stereoplasm sheath 7 is provided with second full skirt 8, and second full skirt 8 is one of them of silicon rubber full skirt or stereoplasm full skirt, second gold utensil 9 is located the both ends of second core rod 6, second equalizer ring 10 sets up in the outside of second gold utensil 9, adopts the metal material.
The scheme shown in fig. 2 is that a hard composite insulator is arranged at the high-voltage end of the silicon rubber composite insulator in a serial connection mode, so that the problem that a sheath at the high-voltage end of the insulator is damaged is effectively solved, and the method is mainly suitable for areas with prominent bird pecking problems at the high-voltage end of the insulator.
The scheme shown in fig. 3 is that a full-hard composite insulator is arranged at the high-voltage end of the silicon rubber composite insulator in a series connection mode, so that the problem that a sheath and an umbrella skirt at the high-voltage end of the insulator are damaged is effectively solved, and the scheme is mainly suitable for areas with prominent bird pecking problems and relatively low anti-pollution flashover requirements at the high-voltage end of the insulator.
The scheme shown in fig. 4 is that a hard composite insulator is arranged at the low-voltage end of the silicon rubber composite insulator in a series connection mode, so that the problem that a sheath at the low-voltage end of the insulator is damaged is effectively prevented, and the scheme is mainly suitable for areas with prominent bird pecking problems at the low-voltage end of the insulator.
The scheme shown in fig. 5 is that a full-hard composite insulator is arranged at the low-voltage end of the silicon rubber composite insulator in a series connection mode, so that the problem that a sheath and an umbrella skirt at the low-voltage end of the insulator are damaged is effectively solved, and the scheme is mainly suitable for areas with prominent bird pecking problems at the low-voltage end of the insulator and relatively low requirements on pollution flashover prevention.
The scheme shown in fig. 6 is that hard composite insulators are arranged at two ends of a silicon rubber composite insulator in a series connection mode, so that the problem that a low-voltage end sheath of the insulator is damaged is effectively prevented, and the scheme is mainly suitable for areas with prominent bird pecking problems at two ends of the insulator.
The scheme shown in fig. 7 is that the full-hard composite insulators are arranged at two ends of the silicon rubber composite insulator in a series connection mode, so that the problem that sheaths at two ends of the insulator and the umbrella skirt are damaged is effectively solved, and the scheme is mainly suitable for areas with prominent bird pecking problems at two ends of the insulator and relatively low anti-pollution flashover requirements.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention discloses an epoxy resin in a hard material and a preparation method of the hard material, wherein the material A is a main material of the hard material and keeps good heat resistance, electrical insulation, hardness and other properties of the whole material;
(2) According to the invention, a mode of serially combining the silicon rubber composite insulator and the hard composite insulator is adopted, because the insulator is mainly at the end part under the damage of bird pecking and the like, the hard composite insulator is arranged at the end part of the silicon rubber composite insulator, based on the advantages of hard materials with greatly improved mechanical flexibility and hydrophobicity and the advantages of traditional silicon rubber materials, the requirements of the composite insulator on heat resistance, insulating property, hydrophobicity and pollution flashover resistance are met, the requirements of the composite insulator on high strength and bird pecking resistance are also met, the organic unification of the hardness, mechanical impact resistance, hydrophobicity and tear resistance of a sheath is realized in the aspect of the performance of the composite insulator, the problems that the traditional silicon rubber material is weak and cannot resist bird pecking, the hydrophobicity of the traditional hard materials is unstable and the flexibility is insufficient are fundamentally solved, and the serial connection mode is adopted, so that the composite insulator is suitable for various voltage grades, except the excellent bird pecking resistance, the problems of local heating, rotten and breakage after long-term operation can be effectively avoided, and the weather resistance of the composite insulator is effectively improved;
(3) The invention has the advantages of the hard composite insulator combined by various silicon rubber materials and hard materials and the structural form of the combination of various silicon rubber composite insulators and hard composite insulators, and can use the composite series insulators with different combination forms according to the requirements of different environments.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. A hard material of an insulator is characterized in that:
the hard material is an epoxy resin material;
the epoxy resin material comprises epoxy resin, a curing agent, a toughening agent, an accelerant, a flame retardant, a silane coupling agent, silicon dioxide and an aluminum hydroxide filler.
2. The hard material of an insulator according to claim 1, wherein:
the epoxy resin consists of a material A and a material B;
the proportion of the material A is 60-90%, and the proportion of the material B is 10-40%.
3. The hard material of an insulator according to claim 1, wherein:
according to the weight, the epoxy resin accounts for 33%, the curing agent accounts for 28%, the toughening agent accounts for 2%, the accelerant accounts for 1%, the flame retardant accounts for 1%, the silane coupling agent accounts for 1%, the silicon dioxide accounts for 16%, and the aluminum hydroxide filler accounts for 18%.
4. The hard material of an insulator according to claim 2, wherein:
the material A is a combination of 3,4-epoxycyclohexylformic acid-3 ',4' -epoxycyclohexylmethyl ester, bis ((3,4-epoxycyclohexyl) methyl) adipate, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylformate and caprolactone, cyclohexane-1,2-dicarboxylic acid diglycidyl ester, hydrogenated bisphenol A epoxy resin.
5. The hard material of an insulator according to claim 4, wherein:
the molar ratio of 3,4-epoxycyclohexanecarboxylic acid-3 ',4' -epoxycyclohexylmethyl ester, bis ((3,4-epoxycyclohexyl) methyl) adipate, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylformate and caprolactone, cyclohexane-1,2-dicarboxylic acid diglycidyl ester, hydrogenated bisphenol a epoxy resin was 1.
6. The hard material of an insulator according to claim 2, wherein:
the material B is a combination of polyether polyol, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether and epoxy-terminated polyether.
7. The hard material of an insulator according to claim 2, wherein:
the polyether polyol, the polyethylene glycol diglycidyl ether, the polypropylene glycol diglycidyl ether, and the epoxy-terminated polyether are present in a molar ratio of about 2.
8. A preparation method of a hard material of an insulator is characterized by comprising the following steps:
the production method is used for producing a hard material according to any one of claims 1 to 7;
the preparation method comprises the following steps:
step 1, respectively carrying out preheating treatment on epoxy resin, a curing agent, silicon dioxide and aluminum hydroxide, then carrying out dehydration treatment for 1-3 hours, removing moisture, gas and volatile substances in the epoxy resin, the curing agent, the silicon dioxide and the aluminum hydroxide, wherein the preheating temperature is 80-120 ℃, and cooling the components to normal temperature after the preheating treatment;
step 2, mixing the epoxy resin, the curing agent, the toughening agent and the accelerator in proportion, stirring for 15-30 min until the mixture is uniform, controlling the temperature between 20-40 ℃ during stirring, and keeping the relative humidity below 60 percent RH;
step 3, sequentially adding the silane coupling agent, the flame retardant, the aluminum hydroxide and the silicon dioxide according to the proportion, and stirring for 15-30 min until the components are uniformly mixed before adding one component;
and 4, stirring and degassing the mixture for 40-60 min.
9. The utility model provides a compound series insulator which characterized in that:
the composite serial insulator comprises a silicon rubber composite insulator and a hard composite insulator, and the hard material of the hard composite insulator is made of the hard material according to any one of claims 1 to 7;
the silicone rubber composite insulator and the hard composite insulator are connected together in series.
10. A composite series insulator according to claim 9, wherein:
the silicon rubber composite insulator comprises a first core rod (1), a silicon rubber sheath (2), a first umbrella skirt (3), a first hardware fitting (4) and a first grading ring (5);
the first core rod (1) is located at the center of the silicon rubber composite insulator and made of glass fiber and epoxy resin, a silicon rubber sheath (2) wraps the outside of the first core rod (1), a first umbrella skirt (3) is arranged on the outer side of the silicon rubber sheath (2), the first umbrella skirt (3) is a silicon rubber umbrella skirt, the first hardware fittings (4) are located at two ends of the first core rod (1), and the first equalizing ring (5) is arranged on the outer side of the first hardware fittings (4) and made of metal materials;
the hard composite insulator comprises a second core rod (6), a hard sheath (7), a second umbrella skirt (8), a second hardware fitting (9) and a second grading ring (10);
second plug (6) are located the central point of stereoplasm composite insulator and put, are made by glass fiber and epoxy material, and the outside parcel of first plug (6) has stereoplasm sheath (7), and the outside of stereoplasm sheath (7) is provided with second full skirt (8), and second full skirt (8) are one of them of silicon rubber full skirt or stereoplasm full skirt, second gold utensil (9) are located the both ends of second plug (6), second equalizer ring (10) set up in the outside of second gold utensil (9), adopt the metal material.
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| CN216362070U (en) * | 2021-07-12 | 2022-04-22 | 国网河南省电力公司电力科学研究院 | Composite insulator of hard material layer reinforced core rod |
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| CN201489923U (en) * | 2009-08-21 | 2010-05-26 | 淄博泰光电力器材厂 | Suspension type insulator |
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