CN103525008A - Composite insulating material, casting busway and preparation method of composite insulating material - Google Patents
Composite insulating material, casting busway and preparation method of composite insulating material Download PDFInfo
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Abstract
The invention discloses a composite insulating material, a casting busway and a preparation method of the composite insulating material. The composite insulating material is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 35-80 parts of curing agent, 12-15 parts of flame retardant, 6-10 parts of promoter, 10-18 parts of flexibilizer, 0.3-0.7 part of defoaming agent, 30-38 parts of aluminium hydroxide and 20-28 parts of silica powder, wherein the epoxy resin is one or more than one of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, epoxidation polybutadiene and phenol aldehyde epoxy resin; the curing agent is one or more than one of imidazole curing agent, amine curing agent and anhydride curing agent. The casting busway comprising the composite insulating material has the advantages that insulation resistance can be more than 500Mohm, and a withstand voltage can be more than 5KV; waterproofness is good, the casting busway can be used in water and is resistant to acid, alkali and corrosion and is flame retardant; protection grade is IP68, and short-time tolerant current intensity is better than that of the existing aluminium alloy shell or other metal shell busways.
Description
Technical field
The present invention relates to technical field of polymer materials, power supplying and distributing equipment field, particularly relates to a kind of composite insulating material, casting type bus duct and preparation method thereof.
Background technology
Current common bus duct shell is aluminum alloy materials or uses iron shell, and (copper bar or aluminium row) is coated as insulant with polyester film for conductor.Junctor between each bus duct unit, the elbow of each shell easily intakes, or damp atmosphere enters insulation is reduced, or directly causes short circuit; When serious, cause the blast of junctor place, even simultaneously that junctor itself and two bus duct unit being attached thereto is badly damaged, cannot repair.Three parts all can only be changed new product.This aluminium alloy or iron outer shell bus slot can not be used for a long time in a humid environment, more can not in water, use, and can not in the environment that has the corrosion such as acid, alkali, use.
Summary of the invention
Based on this, the object of this invention is to provide a kind of composite insulating material.
Concrete technical scheme is as follows:
, by the raw material preparation of following weight part, obtained: 100 parts of epoxy resin, solidifying agent 35-80 part, fire retardant 12-15 part, promotor 6-10 part, toughner 10-18 part, defoamer 0.3-0.7 part, aluminium hydroxide 30-38 part and silicon powder 18-28 part;
Described epoxy resin is one or more in bisphenol A epoxide resin, bisphenol F epoxy resin, bisphenol-s epoxy resin, epoxidized polybutadiene, phenol aldehyde epoxy resin;
Described solidifying agent is one or more in imidazole curing agent, amine curing agent, acid anhydride type curing agent.
In an embodiment, its raw material by following weight part is prepared and is obtained: 100 parts of epoxy resin, solidifying agent 50-75 part, fire retardant 12-15 part, promotor 6-10 part, toughner 10-18 part, defoamer 0.3-0.7 part, aluminium hydroxide 30-35 part and silicon powder 20-22 part therein;
Described epoxy resin is bisphenol A epoxide resin; Described solidifying agent is polyamide curing agent.
In an embodiment, described bisphenol A type epoxy resin is epoxy resin E44 or epoxy resin E35 therein, and described polyamide curing agent is T31.
In an embodiment, described fire retardant is CDP or LXH-999 therein; Described promotor is DMP-30; Described toughner is paracril-26; Described defoamer is defoamer AY-215.
Another object of the present invention is to provide a kind of casting type bus duct.
Concrete technical scheme is as follows:
A kind of casting type bus duct of above-mentioned composite insulating material.
Another object of the present invention is to provide the preparation method of above-mentioned casting type bus duct.
Concrete technical scheme is as follows:
The preparation method of above-mentioned casting type bus duct, comprises the steps:
(1) assembly jig, plays releasing agent, then conductor is installed in mould;
(2) under normal temperature, the raw material of insulating resin is mixed, stirs, vacuumizes and to obtain batch mixing by proportioning;
(3) mixture casting step (2) being obtained is in the mould of step (1);
(4) demoulding after curing 20-26h, obtains described casting type bus duct after finishing polishing.
In an embodiment, in described step (2), the blending means of the raw material of insulating resin comprises the steps: therein
1. epoxy resin, fire retardant, toughner and silicon powder are fully mixed to get to batch mixing 1;
2. by the well-mixed batch mixing 2 of solidifying agent, promotor, aluminium hydroxide and defoamer;
3. under the condition stirring, batch mixing 2 is injected to batch mixing 1, after mix and blend 5-10min, vacuumize to obtain batch mixing.
Principle of the present invention and advantage are as follows:
Epoxy resin refers to the organic high molecular compound that contains two or more epoxide groups in molecule, the molecular structure of epoxy resin is to take in molecular chain to contain active epoxide group as its feature, owing to containing active epoxide group in molecular structure, make them can form with polytype solidifying agent generation crosslinking reaction insoluble, the not molten cancellated superpolymer of three-dimensional that has.
The solidification value of solidifying agent and the thermotolerance of cured article have much relations, and the classification difference of solidifying agent also has a great impact the toughness of final cured article, resistance to acids and bases, water tolerance.The electric property of various auxiliary materials to the composite insulating material after solid, thermotolerance, cracking resistance, strengthening hardness and intensity has very large effect.
The present invention optimizes raw material and the proportioning of above-mentioned composite insulating material by a large amount of experiments, the insulating material obtaining after these raw materials are mixing cured and the bus duct tool that comprises this composite insulating material have the following advantages:
1, the composite insulating material outward appearance after curing molding is scarlet, meets and carries electric equipment to forbid the warning look approaching;
2, the solidification process of insulating material only needs can realize at normal temperatures, and operating procedure is easy, without heating, cost-saving;
3, more than the casting type bus duct dielectric voltage withstand that comprises above-mentioned composite insulating material can reach 5KV, the alternate and insulation resistance of conductor to shell of each bus duct unit (being generally no more than 4 meters)
water resistance is good, can in water, use, and acidproof, alkaline-resisting, corrosion-resistant; Degree of protection reaches IP68, and KA Rms intensity is better than existing bus duct.
4, this bus duct does not ftracture, good toughness, and without fan's stream, chimney-free effect, fire-retardant.
Embodiment
Raw material used in the present invention is as follows:
Epoxy resin E44 is purchased from Qingdao Hua Chang Lan Hai aseptic technic company limited;
Polyurethane curing agent is purchased from Qingdao Hua Chang Lan Hai aseptic technic company limited;
Fire retardant CDP(tolyl diphenyl phosphoester) purchased from Hangzhou Xi Ze Chemical Co., Ltd.;
Altax P-30 is purchased from Shanghai Sai Ya Fine Chemical Co., Ltd;
Toughner paracril-26 are purchased from Shanghai Ze Qing Chemical Co., Ltd.;
Defoamer AY-215 is purchased from Shenzhen An You cleaner in environmental protection company limited;
Silicon powder is purchased from Lianyungang Donghai Silicon Micropowder Co., Ltd..
The method for testing performance of the bus duct that the present invention prepares is as follows:
1, insulation resistance test between alternate and conductor and shell of bus duct conductor
The instrument of using is: ZC-7 megohmmeter, voltage rating 1000V, useful range 0-1000M Ω.The Far East, Beijing instrument company manufactures
Test procedure and method:
With above-mentioned megohmmeter two wire connection clamps, clamp respectively any two sides root and arbitrary phase conductor and bus duct shell in four conductors, it is 120r/min that swinging handle reaches rotating speed, time is 1min, and the insulation resistance data that record by national standard requirement are: each bus duct unit insulation resistance >=20M Ω.
2, the voltage-withstand test of insulating material between alternate and conductor and shell of bus duct conductor
The plant and instrument using is: ZNY-5 flashover breakdown testing apparatus.China electrical science institute, Wuhan Institute of Computer Peripherals produces
The step of voltage-withstand test and method:
Above-mentioned instrument is adjusted, and examined its validity and then test as follows respectively: A-B, A-C, B-C, N-A, N-B, N-C, shell-A, shell-B, shell-C, shell-N, the survey time is 5s at every turn.The correlation standard of country is qualified as long as the withstand voltage 2500V of reaching is.
3, water-fast, waterproof test
This bus duct sample that 500mm is long is put into 2 meters of dark ponds, and soaking 7 is 168 hours round the clock, takes out and drains and rub off the dirt, then insulate and voltage-withstand test.
4, acid resistance test
This bus duct sample that 500mm is long is put into 1.2 meters of dark stream acid solution ponds, the conductor exposing together with bus duct two ends immerses in this solution completely, and the acidity of this solution reaches PH=3, soaks 8 hours, taking-up drains and rubs off the dirt, then carries out insulation resistance and voltage-withstand test.
5, temperature rise experiment
The equipment using is pressed GB7251.1-2005 by white clouds electrical equipment limited-liability company, and the requirement of GB7251.2-2006 and other related requests are manufactured.
The step of test is gathered and method:
Temperature rise test is by GB7251.1-2005, and the related request of GB7251.2-2006 and standard are carried out, and is the known technology of relevant technical staff in the field and technical ability, therefore do not describe at this.
By the following examples the application is further elaborated.
Embodiment 1
A kind of composite insulating material of the present embodiment, is obtained by the raw material preparation of following weight part: epoxy resin E441kg, polyurethane curing agent 0.7kg, fire retardant CDP0.12kg, altax P-300.08kg, toughner paracril-260.12kg, defoamer AY-2150.005kg, aluminium hydroxide 0.3kg and silicon powder 0.28kg;
The preparation method who adopts the casting type bus duct of above-mentioned composite insulating material, comprises the steps:
(1) assembly jig, plays releasing agent, and then conductor is installed in mould and conductor analog bracket is installed;
(2) under normal temperature, each raw material of composite insulating material is mixed, stirs, vacuumizes and to obtain batch mixing by proportioning;
Blending means comprises the steps:
1. epoxy resin, fire retardant, toughner and silicon powder are fully mixed to get to batch mixing 1;
2. by the well-mixed batch mixing 2 of solidifying agent, promotor, aluminium hydroxide and defoamer;
3. under the condition stirring, batch mixing 2 is injected to batch mixing 1, after mix and blend 5-10min, vacuumize to obtain batch mixing;
(3) mixture casting step (2) being obtained is in the mould of step (1);
(4) demoulding after curing 22h, obtains described casting type bus duct after finishing polishing.
The conductor that above-mentioned bus is used is copper bar, and specification is TMY:R4*50, the mm of unit; Length is 500mm, and rated current is 400A.
The performance test results of the casting type bus duct that aforesaid method prepares is as follows:
Do not do the test result before waterproof and acid resistance test: insulation resistance is 1000M Ω (national standard requires each bus duct unit insulation resistance >=20M Ω), the withstand voltage 5000V that is.
The all withstand voltage data of test are 5000V, have reached the maximum useful range of instrument.The correlation standard of country is qualified as long as the withstand voltage 2500V of reaching is.Test result is far above national standard.
Water-fast, waterproof test result: take out trial target and drain and rub off the dirt, then test insulation resistance, result is still 1000M Ω, have no to reduce.Carrying out voltage-withstand test survey still can be by the test of 5000V; The surface bus duct for preparing of the present embodiment is water-fast, water resistance is very good.
Acid resistance test result: take out trial target and first put into from the beginning pond and soak for some time and clean again, at this moment find to have become color by effect bus duct shell and the conductor part of strong acid, drained and wiped off the zone of oxidation on conductor, expose the original color of conductor, test again insulation resistance, result is still 1000M Ω, has no to reduce.Carrying out voltage-withstand test survey still can be by the test of 5000V; Illustrate that its acid resistance is very good.
Embodiment 2
A kind of composite insulating material of the present embodiment, is obtained by the raw material preparation of following weight part: epoxy resin E442kg, polyurethane curing agent 1.5kg, fire retardant CDP0.30kg, altax P-300.25kg, toughner paracril-260.3kg, defoamer AY-2150.006kg, aluminium hydroxide 0.75kg and silicon powder 0.56kg;
The preparation method of the casting type bus duct that comprises above-mentioned insulating resin, comprises the steps:
(1) assembly jig, plays releasing agent, and then conductor is installed in mould, and conductor analog bracket is installed;
(2) under normal temperature, the raw material of insulating resin is mixed, stirs, vacuumizes and to obtain batch mixing by proportioning;
Blending means comprises the steps:
1. epoxy resin, fire retardant, toughner and silicon powder are fully mixed to get to batch mixing 1;
2. by the well-mixed batch mixing 2 of solidifying agent, promotor, aluminium hydroxide and defoamer;
3. under the condition stirring, batch mixing 2 is injected to batch mixing 1, after mix and blend 5-10min, vacuumize to obtain batch mixing;
(3) mixture casting step (2) being obtained is in the mould of step (1);
(4) demoulding after curing 24h, obtains described casting type bus duct after finishing polishing.
The conductor that above-mentioned bus is used is copper bar, and specification is TMY:R5*50, the mm of unit; Length is 500mm, and rated current is 500A.
The performance test results of the casting type bus duct that aforesaid method prepares is as follows:
Do not do the test result before waterproof and acid resistance test: insulation resistance is 1000M Ω (with the megohmmeter of voltage rating 1000V, national standard requires each bus duct unit insulation resistance >=20M Ω), be much better than the relevant low-voltage electrical standard of country.Voltage-withstand test is 5000V.
The all withstand voltage data of test are 5000V, have reached the maximum useful range of instrument.The correlation standard of country is qualified as long as the withstand voltage 2500V of reaching is.Test result is far above national standard.
Water-fast, waterproof test result: take out trial target and drain and rub off the dirt, then test insulation resistance, result is still 1000M Ω, have no to reduce.Carrying out voltage-withstand test survey still can be by the test of 5000V; Illustrate that it is water-fast, water resistance is very good.
Acid resistance test result: take out trial target and first put into from the beginning pond and soak for some time and clean again, at this moment find to have become color by effect bus duct shell and the conductor part of strong acid, drained and wiped off the zone of oxidation on conductor, expose the original color of conductor, test again insulation resistance, result is still 1000M Ω, has no to reduce.Carrying out voltage-withstand test survey still can be by the test of 5000V; Illustrate that its acid resistance is very good.
Embodiment 3
A kind of composite insulating material-FHL of the present embodiment, is obtained by the raw material preparation of following weight part: epoxy resin E4420kg, polyurethane curing agent 16kg, fire retardant CDP2.6kg, altax P-301.2kg, toughner paracril-261.6kg, defoamer AY-2150.12kg, aluminium hydroxide 6.6kg and silicon powder 5kg;
The preparation method of the casting type bus duct that comprises above-mentioned insulating resin, comprises the steps:
(1) assembly jig, plays releasing agent, and then conductor is installed in mould;
(2) under normal temperature, the raw material of insulating resin is mixed, stirs, vacuumizes and to obtain batch mixing by proportioning;
Blending means comprises the steps:
1. epoxy resin, fire retardant, toughner and silicon powder are fully mixed to get to batch mixing 1;
2. by the well-mixed batch mixing 2 of solidifying agent, promotor, aluminium hydroxide and defoamer;
3. under the condition stirring, batch mixing 2 is injected to batch mixing 1, after mix and blend 5-10min, vacuumize to obtain batch mixing;
(3) mixture casting step (2) being obtained is in the mould of step (1);
(4) demoulding after curing 22-26h, obtains described casting type bus duct after finishing polishing.
The conductor that above-mentioned bus is used is copper bar, and specification is TMY:R5*70, the mm of unit; Length is two sections of 1500mm, one section of 3000mm rated current is that 800A (illustrates: by GB GB7251.1-2005, GB7251.2-2006 regulation: the temperature rise test of bus duct must be comprised of three sections of bus duct unit, middle with two junctors connections, and total length is not less than 6 meters.)
The performance test results of the casting type bus duct that aforesaid method prepares is as follows:
The waterproof of the present embodiment and acid resistance test result are similar to embodiment 1.Insulation resistance, withstand voltage test and temperature rise test test and test-results are as follows:
Bus duct is respectively tested mutually insulation resistance and is 1000M Ω (with the megohmmeter of voltage rating 1000V, national standard requires each bus duct unit insulation resistance >=20M Ω), is much better than the relevant low-voltage electrical standard of country; The withstand voltage 5000V that is, is also better than the standard of national 2500V.
Temperature rise test result is that the junction peak temperature rise of two joint bus duct unit is 61.5K, GB GB7251.1-2005, and GB7251.2-2006 regulation is 70K, is better than GB.Shell peak temperature rise is 38.3K, and GB regulation is 55K, is also better than GB.
Comparative example 1
Bisphenol A epoxide resin is first heated to 80 ℃, vacuumizing and defoaming foam 10-15min, be cooled to 60 ℃ of left and right, add fast TA-70 solidifying agent (proportioning: resin: solidifying agent=100:14.5), then be poured into and scribble releasing agent and be preheated to the mould of 50 ℃, at 50 ℃, solidify 4h, be then heated to 80 ℃ of curing 6h, shaping and demoulding.
Contrast with example 1-3:
Insulation resistance, withstand voltage test and test-results are as follows:
The various test insulation resistances of bus duct are 500M Ω, withstand voltage equal 5000V.The low example 1-3 of insulation resistance, withstand voltage the same, the complicated process of preparation of comparative example, product is frangible, demoulding difficulty, and expend many electric energy, increased cost.
Comparative example 2
A kind of composite insulating material of this comparative example, by the raw material preparation of following weight part, obtained: epoxy resin E441kg, polyurethane curing agent 0.8kg, fire retardant CDP0.13kg, altax P-300.06kg, toughner paracril-260.08kg, defoamer AY-2150.006kg, aluminium hydroxide 0.7kg and silicon powder 0.55kg(compare with embodiment 1, and the amount of filler (aluminium hydroxide and silicon powder) is 2 times of embodiment 1).
The preparation method of the casting type bus duct that comprises above-mentioned composite insulating material, comprises the steps:
(1) assembly jig, plays releasing agent, and then conductor is installed in mould;
(2) under normal temperature, the raw material of insulating resin is mixed, stirs, vacuumizes and to obtain batch mixing by proportioning;
Blending means comprises the steps:
1. epoxy resin, fire retardant, toughner and silicon powder are fully mixed to get to batch mixing 1;
2. by the well-mixed batch mixing 2 of solidifying agent, promotor, aluminium hydroxide and defoamer;
3. under the condition stirring, batch mixing 2 is injected to batch mixing 1, after mix and blend 5-10min, vacuumize to obtain batch mixing;
(3) mixture casting step (2) being obtained is in the mould of step (1);
(4) demoulding after curing 22-26h, obtains described casting type bus duct after finishing polishing.
The conductor that above-mentioned bus is used is copper bar, and specification is R5*40, and length is 500mm, and rated current is 400A.
The performance test results of the casting type bus duct that aforesaid method prepares is as follows:
The composite insulating material cast after fixing 1h compound of this formula overflows from mould, and volume nearly doubles, and produces many pores in system, frangible cannot the sizing of cured article after moulding.
1-3 contrasts with example:
Insulation resistance, withstand voltage test and test-results are as follows:
Bus duct test insulation resistance is 1000M Ω, withstand voltage equal 5000V.Insulation resistance, voltage-withstand test is the same with example 1-3.Though insulation resistance, withstand voltagely reaches requirement, profile does not reach requirement, and has a large amount of pores, easily crisp, belongs to underproof product.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. a composite insulating material, it is characterized in that, by the raw material preparation of following weight part, obtained: 100 parts of epoxy resin, solidifying agent 35-80 part, fire retardant 12-15 part, promotor 6-10 part, toughner 10-18 part, defoamer 0.3-0.7 part, aluminium hydroxide 30-38 part and silicon powder 18-28 part;
Described epoxy resin is one or more in bisphenol A epoxide resin, bisphenol F epoxy resin, bisphenol-s epoxy resin, epoxidized polybutadiene, phenol aldehyde epoxy resin;
Described solidifying agent is one or more in imidazole curing agent, amine curing agent, acid anhydride type curing agent.
2. composite insulating material according to claim 1, it is characterized in that, its raw material by following weight part is prepared and is obtained: 100 parts of epoxy resin, solidifying agent 50-75 part, fire retardant 12-15 part, promotor 6-10 part, toughner 10-18 part, defoamer 0.3-0.7 part, aluminium hydroxide 30-35 part and silicon powder 20-22 part;
Described epoxy resin is bisphenol A epoxide resin; Described solidifying agent is polyamide curing agent.
3. composite insulating material according to claim 2, is characterized in that, described bisphenol A type epoxy resin is epoxy resin E44 or epoxy resin E35, and described polyamide curing agent is T31.
4. according to the composite insulating material described in claim 1-3 any one, it is characterized in that, described fire retardant is CDP or LXH-999; Described promotor is DMP-30; Described toughner is paracril-26; Described defoamer is defoamer AY-215.
5. a casting type bus duct that comprises the composite insulating material described in claim 1-4 any one.
6. the preparation method of casting type bus duct claimed in claim 5, is characterized in that, comprises the steps:
(1) assembly jig, plays releasing agent, then conductor is installed in mould;
(2) under normal temperature, the raw material of insulating resin is mixed, stirs, vacuumizes and to obtain batch mixing by proportioning;
(3) mixture casting step (2) being obtained is in the mould of step (1);
(4) demoulding after curing 20-26h, obtains described casting type bus duct after finishing polishing.
7. the preparation method of casting type bus duct according to claim 6, is characterized in that, in described step (2), the blending means of the raw material of insulating resin comprises the steps:
1. epoxy resin, fire retardant, toughner and silicon powder are fully mixed to get to batch mixing 1;
2. by the well-mixed batch mixing 2 of solidifying agent, promotor, aluminium hydroxide and defoamer;
3. under the condition stirring, batch mixing 2 is injected to batch mixing 1, after mix and blend 5-10min, vacuumize to obtain batch mixing.
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