CN101834062B - Sealed pouring method of bushing insulator and conducting rod - Google Patents
Sealed pouring method of bushing insulator and conducting rod Download PDFInfo
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- CN101834062B CN101834062B CN2010101733957A CN201010173395A CN101834062B CN 101834062 B CN101834062 B CN 101834062B CN 2010101733957 A CN2010101733957 A CN 2010101733957A CN 201010173395 A CN201010173395 A CN 201010173395A CN 101834062 B CN101834062 B CN 101834062B
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Abstract
The invention belongs to an insulated structure design of a transformer, relating to a sealing structure of a bushing insulator and a conducting rod and a pouring method thereof. The sealing structure of the bushing insulator and the conducting rod is sequentially manufactured by the following steps of: a-1 buffer glue coating, a assembly assembling, a-2 coupling agent coating, b pouring material pouring and c pressure testing. The pouring method of the sealing structure the bushing insulator and the conducting rod comprises the following steps of: a assembly assembling, b pouring material pouring and c pressure testing. The invention has the advantages of simple operation, reliable sealing performance, firm fixation and difficult aging, solves the problem of inconsistent expansion coefficient, avoids the phenomena of expanded crack and sealing and bonding detachment of the bushing insulator and is mainly applied to the sealing fixation of the bushing insulators and the conducting rods of oil-immersed transformers, explosion-insulating transformers for mine, gas insulating transformers and high and low-voltage switching equipment.
Description
(1) technical field
The invention belongs to transformer insulated structural design, relate to the hermetically-sealed construction and the pouring procedure thereof of a kind of bushing insulator and conducting rod.
(2) background technology
The sealing reliability of bushing insulator and conducting rod is to be related to the whether key of seepage oil (or gas) of transformer or switchgear.Present stage, rubber seal is adopted in the connection sealing of bushing insulator and conducting rod usually, has the situations such as easily loosening, that sealing gasket is easily aging of fixing; The application of direct employing epoxy resin (or other resin) cast is also arranged in recent years, but because the coefficient of expansion of bushing insulator and mould material is inconsistent, in actual application environment, bushing insulator very easily occurs and rise and split, seal the phenomenon of bonding disengaging.
(3) summary of the invention
The present invention is in order to remedy the deficiencies in the prior art, and the hermetically-sealed construction and the pouring procedure thereof of a kind of simple to operate, reliable bushing insulator of sealing property and conducting rod is provided.
The present invention is achieved through the following technical solutions:
The hermetically-sealed construction of bushing insulator of the present invention and conducting rod, its special character is: make as follows successively: a-1 is coated with buffering adhesive, a assembled, a-2 and is coated with coupling agent, b cast pours, c pressure test.
The sealed cast method of bushing insulator of the present invention and conducting rod may further comprise the steps:
A assembled: with bushing insulator with conducting rod is assembled and fastening with nut and adjusting pad, form thimble assembly;
B pours into a mould pours:
(1) cast: thimble assembly is stood up, pours slowly is poured in the collar aperture, up to the cast liquid level equal substantially with the bushing insulator end face or be lower than bushing insulator end face 1-3mm till;
(2) oven dry: the thimble assembly after will pouring into a mould solidifies 4～6h under 65～80 ℃ of ambient temperatures, and the end face that is trimmed to then after the cast is smooth substantially;
The c pressure test: thimble assembly after will drying and airtight container charge into gas to airtight container after connecting, and when pressure reached 1Mpa, in the whole immersion water of thimble assembly and airtight container, 3～5min was observed in pressurize, and the cast bonding interface does not have gas leak phenomenon and gets final product.
The sealed cast method of bushing insulator of the present invention and conducting rod, preferred version be,
The front of step a comprises that also step a-1 is coated with buffering adhesive: bushing insulator endoporus sidewall evenly applies buffering adhesive;
The back of step a comprises that also step a-2 is coated with coupling agent: the cast bonded part of conducting rod, nut and adjusting pad and the surface of buffering adhesive all are coated with coupling agent one time.
The sealed cast method of bushing insulator of the present invention and conducting rod,
Pours is made up of the raw material of following parts by weight: 100 parts of 6101 epoxy resin, 90～120 parts of 200 order alumina powders, 7～15 parts of dibutylesters, 17～20 parts of 4～6 parts of ethylenediamines and triethanolamines;
Pours is made by following method: earlier epoxy resin, alumina powder, dibutylester are mixed and heated to 50～60 ℃, and stir, add ethylenediamine and triethanolamine then, stirring gets final product.
The sealed cast method of bushing insulator of the present invention and conducting rod, among the step a-1: bushing insulator endoporus sidewall is the two component polysulfide sealant one decks of coating evenly, thickness 3-4mm, and in 50～60 ℃ of environment, dry 4h or spontaneous curing 24h, form buffering adhesive; Among the step a-2: the cast bonded part of conducting rod, nut and adjusting pad and the surface of buffering adhesive all are coated with KH-5 coupling agent liquid one time, in 50～60 ℃ of environment the oven dry or dry naturally.
The sealed cast method of bushing insulator of the present invention and conducting rod, further comprising the steps of before the step a-1: a-1-1 is clean with the dust and the oil removal at bushing insulator surface and the bonding position of inner hole wall, dries or dries; A-1-2 vulcanizes cream by A: B=10 with basic cream of the A component of two component polysulfide sealants white and B component black: 1 part by weight mixes, till no color differnece.
The sealed cast method of bushing insulator of the present invention and conducting rod among the step a, with deoil behind decontamination, the acid wash passivation oven dry or dry naturally of conducting rod, nut, is carried out assembled then.
The invention has the beneficial effects as follows, simple to operate, sealing property is reliable, fixing difficult loosening, difficult aging, solved the inconsistent problem of the coefficient of expansion, avoid bushing insulator to rise and split, sealed the phenomenon of bonding disengaging, be mainly used in the bushing insulator of oil-filled transformer, flameproof mining transformer, gas-insulated transformer and high and low voltage switch equipment and the sealing and fixing of conducting rod.
(4) description of drawings
Fig. 1 is the sealed connection schematic diagram of bushing insulator and conducting rod, and Fig. 2 is bushing insulator and conducting rod assembling and cast placement schematic diagram, and Fig. 3 is that pressure test is placed schematic diagram.
Among the figure: 1 bushing insulator, 2 flanges, 3 seal gaskets, 4 presser feets, 5 adjusting pads, 6 nuts, 7 pours, 8 conducting rods, 9 buffering adhesives, 10 alignment pins, 11 airtight containers, 12 water fillings are chewed, 13 water pressure tables.
(5) embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
The hermetically-sealed construction of bushing insulator of the present invention and conducting rod, make as follows successively: a-1 is coated with buffering adhesive, a assembled, a-2 and is coated with coupling agent, b cast pours, c pressure test.
The sealed cast method of bushing insulator of the present invention and conducting rod, preferred version is, is made up of following steps: be coated with buffering adhesive, assembled, be coated with coupling agent, join pours, cast, oven dry, pressure test.
The sealed cast method of bushing insulator of the present invention and conducting rod, its special character is: may further comprise the steps:
The a assembled: bushing insulator 1 and conducting rod 8 are assembled, and alignment pin 10 is used for the location, and fastening with nut 6 and adjusting pad 5, forms thimble assembly;
B pours into a mould pours:
(1) cast: thimble assembly is stood up, pours 7 slowly is poured in the collar aperture, up to the cast liquid level equal substantially with the bushing insulator end face or be lower than bushing insulator end face 1-3mm till;
(2) oven dry: the thimble assembly after will pouring into a mould solidifies 4～6h under 65～80 ℃ of ambient temperatures, and the end face that is trimmed to then after the cast is smooth substantially;
C pressure test: after thimble assembly after will drying and airtight container 11 connect by presser feet 4 and seal gasket 3, chew 12 by water filling and charge into gas to airtight container, observe water pressure table 13, when pressure reaches 1Mpa, in the whole immersion water of thimble assembly and airtight container, 3～5min is observed in pressurize, and the cast bonding interface does not have gas leak phenomenon and gets final product.
The sealed cast method of bushing insulator of the present invention and conducting rod, the front of step a comprise that also step a-1 is coated with buffering adhesive 9: bushing insulator endoporus sidewall evenly applies buffering adhesive 9;
The back of step a comprises that also step a-2 is coated with coupling agent: the cast bonded part of conducting rod, nut and adjusting pad and the surface of buffering adhesive all are coated with coupling agent one time.
The sealed cast method of bushing insulator of the present invention and conducting rod,
Pours 7 is made by the raw material of following weight: 6101 epoxy resin 100g, 200 order alumina powders, 90～120g, dibutylester 7～15g, ethylenediamine (curing agent) 4～6g, triethanolamine (curing agent) 17～20g;
Pours is made by following method: earlier epoxy resin, alumina powder, dibutylester are mixed and heated to 50～60 ℃, and stir, add ethylenediamine and triethanolamine then, stirring gets final product.
The sealed cast method of bushing insulator of the present invention and conducting rod, among the step a-1: the cast bonded part of bushing insulator endoporus sidewall is the two component polysulfide sealant one decks of coating evenly, thickness 3-4mm, and in 50～60 ℃ of environment, dry 4h or spontaneous curing 24h, form buffering adhesive; Among the step a-2: the bonding position of the cast bonded part of conducting rod, nut and adjusting pad and the surface of buffering adhesive and epoxy resin all is coated with KH-5 coupling agent liquid one time, in 50～60 ℃ of environment the oven dry or dry naturally.
The sealed cast method of bushing insulator of the present invention and conducting rod, further comprising the steps of before the step a-1: a-1-1 is clean with the dust and the oil removal at bushing insulator surface and the bonding position of inner hole wall, dries or dries; A-1-2 vulcanizes cream by A: B=10 with basic cream of the A component of two component polysulfide sealants white and B component black: 1 part by weight mixes, till no color differnece.
The sealed cast method of bushing insulator of the present invention and conducting rod among the step a, with deoil behind decontamination, the acid wash passivation oven dry or dry naturally of conducting rod, nut, is carried out assembled then.
After pressure test was qualified, thimble assembly connect with flange 2 by presser feet 4 and seal gasket 3.
Two component polysulfide sealants have high resiliency after solidifying, and become buffering adhesive.In actual application environment, because the coefficient of expansion of epoxy resin and bushing insulator is inconsistent, if ambient temperature raises rapidly, the epoxy resin volume can obviously expand.The volume that increases because of expansion will be cushioned glue (two component polysulfide sealant) and absorb, and has prevented that effectively rising of bushing insulator from splitting; If ambient temperature reduces rapidly, the epoxy resin volume can obviously shrink, and the volume that reduces because of contraction will effectively prevent bonding interface outlet bushing insulator and epoxy resin crack by buffering adhesive (two component polysulfide sealant) compensation.The KH-5 coupling agent can make two kinds of material interface couplings that performance difference is very big, increases bond strength.
Claims (3)
1. the sealed cast method of bushing insulator and conducting rod is characterized in that: may further comprise the steps:
A-1 is coated with buffering adhesive: bushing insulator endoporus sidewall is the two component polysulfide sealant one decks of coating evenly, thickness 3-4mm, and in 50～60 ℃ of environment, dry 4h or spontaneous curing 24h, form buffering adhesive;
A assembled: with bushing insulator with conducting rod is assembled and fastening with nut and adjusting pad, form thimble assembly;
A-2 is coated with coupling agent: the cast bonded part of conducting rod, nut and adjusting pad and the surface of buffering adhesive all are coated with KH-5 coupling agent liquid one time, in 50～60 ℃ of environment the oven dry or dry naturally; B pours into a mould pours:
(1) cast: thimble assembly is stood up, pours slowly is poured in the collar aperture, equal substantially up to the cast liquid level with the bushing insulator end face;
(2) oven dry: the thimble assembly after will pouring into a mould solidifies 4～6h under 65～80 ℃ of ambient temperatures, and the end face that is trimmed to then after the cast is smooth substantially;
The c pressure test: thimble assembly after will drying and airtight container charge into gas to airtight container after connecting, and when pressure reached 1Mpa, in the whole immersion water of thimble assembly and airtight container, 3～5min was observed in pressurize, and the cast bonding interface does not have gas leak phenomenon and gets final product;
Pours is made up of the raw material of following parts by weight: 100 parts of 6101 epoxy resin, 90～120 parts of 200 order alumina powders, 7～15 parts of dibutylesters, 17～20 parts of 4～6 parts of ethylenediamines and triethanolamines; Pours is made by following method: earlier epoxy resin, alumina powder, dibutylester are mixed and heated to 50～60 ℃, and stir, add ethylenediamine and triethanolamine then, stirring gets final product.
2. the sealed cast method of bushing insulator according to claim 1 and conducting rod is characterized in that: further comprising the steps of before the step a-1: a-1-1 is clean with the dust and the oil removal at bushing insulator surface and the bonding position of inner hole wall, dries or dries; A-1-2 vulcanizes cream by A: B=10 with basic cream of the A component of two component polysulfide sealants white and B component black: 1 part by weight mixes, till no color differnece.
3. the sealed cast method of bushing insulator according to claim 1 and conducting rod is characterized in that: among the step a, with deoil behind decontamination, the acid wash passivation oven dry or dry naturally of conducting rod, nut, carry out assembled then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101733957A CN101834062B (en) | 2010-05-14 | 2010-05-14 | Sealed pouring method of bushing insulator and conducting rod |
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| CN2010101733957A CN101834062B (en) | 2010-05-14 | 2010-05-14 | Sealed pouring method of bushing insulator and conducting rod |
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| CN101834062A CN101834062A (en) | 2010-09-15 |
| CN101834062B true CN101834062B (en) | 2011-12-21 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103000259B (en) * | 2011-09-13 | 2016-03-23 | 辽宁省电力有限公司本溪供电公司 | High voltage power transmission and transforming is with lengthening conducting rod |
| CN103552202A (en) * | 2013-10-31 | 2014-02-05 | 浙江省开化七一电力器材有限责任公司 | Composite bushing machining method |
| CN105825973A (en) * | 2016-04-28 | 2016-08-03 | 长葛市恒瑞电瓷电器有限公司 | Pintype insulator easy to assemble and dismount |
| CN106783093B (en) * | 2017-02-06 | 2019-03-15 | 苏州翰为电气科技有限公司 | A kind of hermetically sealed combined type 1kV grades of casings of oil-immersed transformer |
| CN110211769B (en) * | 2019-06-18 | 2024-05-31 | 四川智翔电器有限公司 | Sulfur hexafluoride phase-shifting transformer |
| CN112967879B (en) * | 2021-02-01 | 2022-12-06 | 新昌县新明实业有限公司 | Forming processing technology for insulating material electroceramic of transformer |
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Effective date of registration: 20170803 Address after: 274200, Shandong province Heze County Chengwu eastern suburbs Industrial Park Patentee after: SHANDONG DACHI HIGH VOLTAGE SWITCHGEAR CO., LTD. Address before: 274200 Chengwu County, Shandong Province, the eastern suburbs of economic and Technological Development Zone Patentee before: Shandong Dachi Electric Co., Ltd. |