CN110003415A - A kind of inner core packing material and preparation method thereof for composite insulation cross arm - Google Patents
A kind of inner core packing material and preparation method thereof for composite insulation cross arm Download PDFInfo
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- CN110003415A CN110003415A CN201910312904.0A CN201910312904A CN110003415A CN 110003415 A CN110003415 A CN 110003415A CN 201910312904 A CN201910312904 A CN 201910312904A CN 110003415 A CN110003415 A CN 110003415A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
-
- 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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
Abstract
The inner core packing material and preparation method thereof that the invention discloses a kind of for composite insulation cross arm comprising the raw material of following parts by weight: 1-2 parts of foam stabilizer, 8-10 parts of catalyst, black material 1000-1200 parts, white material 950-1050 parts, 1-10 parts of filler.The flat contact angle for improving the inner core packing material by a certain amount of filler of addition improves its ageing-resistant and anti-breakdown performance to 140 °.The invention novel and unique, is skillfully constructed, and prepared by the method inner core packing material can greatly improve the insulation performance and service life of composite insulation cross arm.
Description
Technical field
The present invention relates to inner core packing material technical fields, fill out more particularly to a kind of inner core for composite insulation cross arm
Fill material and preparation method thereof.
Background technique
With the raising of China's electric power network technique level, transmission line of electricity present long range, scale, enlargement development become
Gesture.Currently, China's transmission line of electricity is all to continue to use traditional steel tower, steel pipe pole, concrete frame configuration steel cross-arm, suspension insulator
The form of string is run.In order to meet the needs of corresponding insulation distance and creepage distance, metal cross arm must configure very long exhausted
Edge substring often occurs the failure because of caused by conductor galloping under the bad weathers such as strong wind, sleet, seriously threatens power transmission line
The safe operation on road, transmission line of electricity voltage class is higher, and corresponding insulator chain is also longer, certainly will increase in this way
The height of steel tower increases steel tower rolled steel dosage, increases workload to the day-to-day operation and service work of transmission line of electricity.Together
When, in order to avoid causing to trip because of conductor galloping, it is necessary to increase wire spacing, the occupied area in transmission of electricity corridor certainly will be increased,
In the case where current land resource is in short supply, no small trouble is brought to the investment construction of transmission line of electricity.Compound material insulation
Cross-arm is due to corrosion-resistant, anti-aging, reduction line upkeep cost, reduction transport and assembling cost, improving distribution line
The advantages that dielectric level, just gradually substitutes original metal cross arm.In the world, Japan has just carried out defeated early in the 1960s
The research of the compound cross-arm of electric line, Canada applies from nineteen ninety-five beginning 10kV, 69kV, 132kV route, 2005 years lotuses
Blue power grid completes a composite insulation cross arm 380/150kV route.The country, Wuhan High Voltage Research Institute Of State Grid is developed within 2007
Function 10kV line thunder protection is hit and the insulator crossarm of pollution flashover, the compound inslation that Nantong Shen Ma Power Tech Corp. Inc. develops
Cross-arm puts into trial operation in Lianyun Harbour 220kv Mao Qiang line in December, 2009.Current compound cross-arm is in quick in China at present
Development trend, future are with a wide range of applications.
Composite insulation cross arm is by silicon rubber umbrella skirt, sheath, plug, inner core composition.Polyurethane inner core has light weight, insulation
Intensity is good, and foam simple advantage, is applied to insulator crossarm interior insulation.Now widely used polyurethane foamed material is freely
Foaming, isocyanates (black material) and polyalcohol (white material) are two kinds of components for preparing polyurethane foam, adjust the white material of black material not
In proportion, start to foam after being mixed into mold.It is liquid under black material and white material room temperature, convenient for processing.To polyurethane material
For performance itself, the characteristics of polyurethane foam after molding has both solid and hollow material, density is low and insulation performance is preferable,
But there is following problem, be that internal porosity arrangement is uneven first, rate of closed hole and pore opening can influence after having moisture penetration
Internal field strength causes the reduction of polyurethane breakdown voltage；Secondly, different component polyurethane body material property parameter is to dyestuff penetration
There is influence in experiment and water diffusion experiment.The size of polyurethane stomata, unevenness and arrangement mode can to dielectric properties
Large effect is generated, in foaming process, different proportion A, B material, which meets water fever temperature rise expansion and generates vesicle, squeezes inner wall, is formed
Spontaneous adhesive layer and generate interface, after a period of time of foaming, temperature decline causes integral material to shrink, due to expand with heat and contract with cold effect
The stress that should be generated also can pair and interface have an impact.
Therefore, material modification is carried out to obtain the object for adapting to composite insulation cross arm actual motion condition to polyurethane material
Reason/electrology characteristic is of great significance.
Summary of the invention
The object of the present invention is to provide a kind of inner core packing materials for composite insulation cross arm.
It is a further object of the present invention to provide the preparation methods of the inner core packing material.
A kind of inner core packing material for composite insulation cross arm, the raw material including following parts by weight:
1-2 parts of foam stabilizer, 8-10 parts of catalyst, black material 1000-1200 parts, white material is 950-1050 parts, filler 1-10
Part.
Preferably, the foam stabilizer is lauryl sodium sulfate, and catalyst is ultrapure water, and black material is isocyanates, white material
For polyalcohol, filler is improved silica.
Preferably, the improved silica preparation method the following steps are included:
(1) 19.4g-38.8g sodium metasilicate is dissolved in 200mL-600mL distilled water, is added 100mL-200mL's
NH4Cl is uniformly mixed；
(2) then uniformly mixed solution is placed in water-bath, control bath temperature is 60 DEG C -80 DEG C, stirs 3h；
(3) it is cooled to room temperature, filters, then solid filtrate 3 times wash with distilled water after stirring；
(4) the solid filtrate after cleaning is dissolved in the ethyl alcohol of 100mL-400mL, 0.01mol- is then added
The trim,ethylchlorosilane of 0.05mol then cools to room temperature after mixing evenly in 80 DEG C of heating 3h, and solid is precipitated；
(5) solid of precipitation is separated, and heating in vacuum for 24 hours, obtains improved silica at 100 DEG C.
Preferably, the polyalcohol is polypropylene glycol 400.
Preferably, the isocyanates is methyl diphenylene diisocyanate.
The preparation method of inner core packing material for composite insulation cross arm, comprising the following steps:
(1) by mold clean it is clean after, even application release agent；
(2) mold for spraying release agent will be preheated for 24 hours at 105 DEG C；
(3) after mixing black material and catalyst, foam stabilizer in proportion, mixture one is obtained；
(4) after mixing white material and filler in proportion, mixture two is obtained；
(5) mixture one and mixture two are mixed, and stirs 10-30s in the case where revolving speed is 1000-8000rpm；
(6) it is filled in the mold of preheating after stirring, solidifies 10-20h at 100-200 DEG C, be removed from the molds
The product of curing molding obtains the inner core packing material for composite insulation cross arm.
Preferably, the release agent is the silicone oil that molecular weight is 2500.
Compared with prior art, the invention has the following advantages: the inner core for composite insulation cross arm of the invention
Increase filler in packing material, to improve its physics/electrology characteristic, when in particular by modified silica as filler,
It can greatly improve the reactance voltage breakdown capability of inner core packing material, with 140 ° of water contact angle；Product of the present invention is unique, structure
It is novel to think, and the insulation performance of insulator crossarm is greatly improved using it, extends the service life of insulator crossarm.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that inner core packing material prepared by the embodiment of the present invention 1 is filled in the contact angle side view in cross-arm；
Fig. 2 is that inner core packing material prepared by comparative example 1 is filled in the contact angle side view in cross-arm；
Inner core packing material the hitting under different disruptive field intensities that Fig. 3 is 1-4 of the embodiment of the present invention and prepared by comparative example 1
Wear probability.
Specific embodiment
Below in conjunction with specific embodiment and attached drawing, the invention will be further described.
Embodiment 1
A kind of inner core packing material for composite insulation cross arm, the raw material including following parts by weight:
Lauryl sodium sulfate is 1 part, and ultrapure water is 8 parts, and methyl diphenylene diisocyanate is 1000 parts, polypropylene glycol
400 be 950 parts, and improved silica is 1 part, the preparation method of the improved silica the following steps are included:
(1) 19.4g sodium metasilicate is dissolved in 200ml distilled water, the NH of 100mL is added4Cl is uniformly mixed；
(2) then uniformly mixed solution is placed in water-bath, control bath temperature is 60 DEG C, stirs 3h；
(3) it is cooled to room temperature, filters, then solid filtrate 3 times wash with distilled water after stirring；
(4) the solid filtrate after cleaning is dissolved in the ethyl alcohol of 100mL, the trimethyl chlorine of 0.01mol is then added
Silane then cools to room temperature after mixing evenly in 80 DEG C of heating 3h, and solid is precipitated；
(5) solid of precipitation is separated, and heating in vacuum for 24 hours, obtains improved silica at 100 DEG C.
Preparation method of the present invention for the inner core packing material of composite insulation cross arm, comprising the following steps:
(1) by mold clean completely after even application release agent, the remover is the silicone oil that molecular weight is 2500；
(2) mold for spraying release agent is preheated for 24 hours at 105 DEG C；
(3) it after mixing methyl diphenylene diisocyanate and ultrapure water, lauryl sodium sulfate in proportion, is mixed
Object one；
(4) after mixing polypropylene glycol 400 and improved silica in proportion, mixture two is obtained；
(5) mixture one and mixture two are mixed, and stirs 30s in the case where revolving speed is 1000rpm；
(6) it is filled in the mold of preheating after stirring, solidifies 20h at 100 DEG C, be removed from the molds curing molding
Product, obtain the inner core packing material for composite insulation cross arm.
Inner core packing material of the invention is filled into cross-arm, as shown in Figure 1, there are the packing material 140 ° of levels to connect
Feeler.
Embodiment 2
A kind of inner core packing material for composite insulation cross arm, the raw material including following parts by weight:
Lauryl sodium sulfate be 1.5 parts, ultrapure water be 9 parts, methyl diphenylene diisocyanate be 1100 parts, poly- third
Glycol 400 is 1000 parts, and improved silica is 3 parts, the preparation method of the improved silica the following steps are included:
(1) 25.9g sodium metasilicate is dissolved in 300ml distilled water, the NH of 130mL is added4Cl is uniformly mixed；
(2) then uniformly mixed solution is placed in water-bath, control bath temperature is 72 DEG C, stirs 3h；
(3) it is cooled to room temperature, filters, then solid filtrate 3 times wash with distilled water after stirring；
(4) the solid filtrate after cleaning is dissolved in the ethyl alcohol of 130mL, the trimethyl chlorine of 0.02mol is then added
Silane then cools to room temperature after mixing evenly in 80 DEG C of heating 3h, and solid is precipitated；
(5) solid of precipitation is separated, and heating in vacuum for 24 hours, obtains improved silica at 100 DEG C.
Preparation method of the present invention for the inner core packing material of composite insulation cross arm, comprising the following steps:
(1) by mold clean completely after even application release agent, the remover is the silicone oil that molecular weight is 2500；
(2) mold for spraying release agent is preheated for 24 hours at 105 DEG C；
(3) it after mixing methyl diphenylene diisocyanate and ultrapure water, lauryl sodium sulfate in proportion, is mixed
Object one；
(4) after mixing polypropylene glycol 400 and improved silica in proportion, mixture two is obtained；
(5) mixture one and mixture two are mixed, and stirs 25s in the case where revolving speed is 3000rpm；
(6) it is filled in the mold of preheating after stirring, solidifies 15h at 140 DEG C, be removed from the molds curing molding
Product, obtain the inner core packing material for composite insulation cross arm.
Inner core packing material of the invention is filled into cross-arm, which has 140 ° of flat contact angles.
Embodiment 3
A kind of inner core packing material for composite insulation cross arm, the raw material including following parts by weight:
Lauryl sodium sulfate is 2 parts, and ultrapure water is 10 parts, and methyl diphenylene diisocyanate is 1150 parts, poly- the third two
Alcohol 400 is 1000 parts, and improved silica is 5 parts, the preparation method of the improved silica the following steps are included:
(1) 31.5g sodium metasilicate is dissolved in 400ml distilled water, the NH of 150mL is added4Cl is uniformly mixed；
(2) then uniformly mixed solution is placed in water-bath, control bath temperature is 75 DEG C, stirs 3h；
(3) it is cooled to room temperature, filters, then solid filtrate 3 times wash with distilled water after stirring；
(4) the solid filtrate after cleaning is dissolved in the ethyl alcohol of 250mL, the trimethyl chlorine of 0.04mol is then added
Silane is cooled to room temperature after 80 DEG C of heating 3h after mixing evenly, and solid is precipitated；
(5) solid of precipitation is separated, and heating in vacuum for 24 hours, obtains improved silica at 100 DEG C.
Preparation method of the present invention for the inner core packing material of composite insulation cross arm, comprising the following steps:
(1) by mold clean completely after even application release agent, the remover is the silicone oil that molecular weight is 2500；
(2) mold for spraying release agent is preheated for 24 hours at 105 DEG C；
(3) it after mixing methyl diphenylene diisocyanate and ultrapure water, lauryl sodium sulfate in proportion, is mixed
Object one；
(4) after mixing polypropylene glycol 400 and improved silica in proportion, mixture two is obtained；
(5) mixture one and mixture two are mixed, and stirs 15s in the case where revolving speed is 5000rpm；
(6) it is filled in the mold of preheating after stirring, solidifies 12h at 160 DEG C, be removed from the molds curing molding
Product, obtain the inner core packing material for composite insulation cross arm.
Inner core packing material of the invention is filled into cross-arm, which has 140 ° of flat contact angles.
Embodiment 4
A kind of inner core packing material for composite insulation cross arm, the raw material including following parts by weight:
Lauryl sodium sulfate is 2 parts, and ultrapure water is 10 parts, and methyl diphenylene diisocyanate is 1200 parts, poly- the third two
Alcohol 400 is 1050 parts, and improved silica is 10 parts, the preparation method of the improved silica the following steps are included:
(1) 38.8g sodium metasilicate is dissolved in 600mL distilled water, the NH of 200mL is added4Cl is uniformly mixed；
(2) then uniformly mixed solution is placed in water-bath, control bath temperature is 80 DEG C, stirs 3h；
(3) it is cooled to room temperature, filters, then solid filtrate 3 times wash with distilled water after stirring；
(4) the solid filtrate after cleaning is dissolved in the ethyl alcohol of 400mL, the trimethyl chlorine of 0.05mol is then added
Silane is cooled to room temperature after 80 DEG C of heating 3h after mixing evenly, and solid is precipitated；
(5) solid of precipitation is separated, and heating in vacuum for 24 hours, obtains improved silica at 100 DEG C.
Preparation method of the present invention for the inner core packing material of composite insulation cross arm, comprising the following steps:
(1) by mold clean completely after even application release agent, the remover is the silicone oil that molecular weight is 2500；
(2) mold for spraying release agent is preheated for 24 hours at 105 DEG C；
(3) it after mixing methyl diphenylene diisocyanate and ultrapure water, lauryl sodium sulfate in proportion, is mixed
Object one；
(4) after mixing polypropylene glycol 400 and improved silica in proportion, mixture two is obtained；
(5) mixture one and mixture two are mixed, and stirs 10s in the case where revolving speed is 8000rpm；
(6) it is filled in the mold of preheating after stirring, solidifies 10h at 200 DEG C, be removed from the molds curing molding
Product, obtain the inner core packing material for composite insulation cross arm.
Inner core packing material of the invention is filled into cross-arm, which has 140 ° of flat contact angles.
Comparative example 1
According to the inner core packing material of embodiment 1, improved silica is not added for comparative example 1, uses following parts by weight
Raw material be prepared: lauryl sodium sulfate be 1 part, ultrapure water be 8 parts, methyl diphenylene diisocyanate be 1000 parts,
Polypropylene glycol 400 is 950 parts.Specific preparation method, comprising the following steps:
(1) by mold clean completely after even application release agent, the remover is the silicone oil that molecular weight is 2500；
(2) mold for spraying release agent is preheated for 24 hours at 105 DEG C；
(3) it after mixing methyl diphenylene diisocyanate and ultrapure water, lauryl sodium sulfate in proportion, is mixed
Object one；
(4) polypropylene glycol 400 is weighed in proportion, is poured into mixture one, and is stirred in the case where revolving speed is 1000rpm
Mix 30s；
(5) it is filled in the mold of preheating after stirring, solidifies 20h at 100 DEG C, be removed from the molds curing molding
Product, obtain the inner core packing material for composite insulation cross arm.
Inner core packing material of the invention is filled into cross-arm, as shown in Fig. 2, there are the packing material 65 ° of levels to connect
Feeler.
The volume inner core packing material that Fig. 3 is 1-4 of the embodiment of the present invention and prepared by comparative example 1 is under different disruptive field intensities
Breakdown probability figure, it can be seen that, the inner core packing material for composite insulation cross arm of the invention have it is preferable ageing-resistant and
Anti- breakdown performance.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (7)
1. a kind of inner core packing material for composite insulation cross arm, which is characterized in that the raw material including following parts by weight:
1-2 parts of foam stabilizer, 8-10 parts of catalyst, black material 1000-1200 parts, white material 950-1050 parts, 1-10 parts of filler.
2. the inner core packing material according to claim 1 for composite insulation cross arm, which is characterized in that the foam stabilizer
For lauryl sodium sulfate, catalyst is ultrapure water, and black material is isocyanates, and white material is polyalcohol, and filler is modified titanium dioxide
Silicon.
3. the inner core packing material of composite insulation cross arm is used for described in require 2 according to right, which is characterized in that the modification
Silica includes that following methods are prepared:
1) 19.4g-38.8g sodium metasilicate is dissolved in 200mL-600mL distilled water, the NH of 100mL-200mL is added4Cl is mixed
It closes uniform；
2) then uniformly mixed solution is placed in water-bath, control bath temperature is 60 DEG C -80 DEG C, stirs 3h；
3) it is cooled to room temperature, filters, then solid filtrate 3 times wash with distilled water after stirring；
4) the solid filtrate after cleaning is dissolved in the ethyl alcohol of 100mL-400mL, is then added 0.01mol-0.05mol's
Trim,ethylchlorosilane then cools to room temperature after mixing evenly in 80 DEG C of heating 3h, and solid is precipitated；
5) solid of precipitation is separated, and heating in vacuum for 24 hours, obtains improved silica at 100 DEG C.
4. the inner core packing material according to claim 2 for composite insulation cross arm, which is characterized in that the polyalcohol
For polypropylene glycol 400.
5. the inner core packing material according to claim 2 for composite insulation cross arm, which is characterized in that the isocyanic acid
Ester is methyl diphenylene diisocyanate.
6. the preparation method of the inner core packing material according to claim 1-5 for composite insulation cross arm,
It is characterized in that, comprising the following steps:
(1) by mold clean it is clean after, even application release agent；
(2) mold is preheated for 24 hours at 105 DEG C；
(3) after mixing black material and catalyst, foam stabilizer in proportion, mixture one is obtained；
(4) after mixing white material and filler in proportion, mixture two is obtained；
(5) mixture one and mixture two are mixed, and stirs 10-30s in the case where revolving speed is 1000-8000rpm；
(6) it is filled in the mold of preheating after stirring, solidifies 10-20h at 100-200 DEG C, be removed from the molds solidification
Molding product obtains the inner core packing material for composite insulation cross arm.
7. the preparation method of the inner core packing material according to claim 6 for composite insulation cross arm, which is characterized in that
The release agent is the silicone oil that molecular weight is 2500.
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