CN101615455B - Manufacturing method of vacuum glue-dipping insulation pipe without air gaps - Google Patents

Manufacturing method of vacuum glue-dipping insulation pipe without air gaps Download PDF

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Publication number
CN101615455B
CN101615455B CN2009103053033A CN200910305303A CN101615455B CN 101615455 B CN101615455 B CN 101615455B CN 2009103053033 A CN2009103053033 A CN 2009103053033A CN 200910305303 A CN200910305303 A CN 200910305303A CN 101615455 B CN101615455 B CN 101615455B
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CN
China
Prior art keywords
glue
insulation pipe
step
vacuum
core
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CN2009103053033A
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Chinese (zh)
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CN101615455A (en
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朱笑梅
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朱笑梅
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Priority to CN2009103053033A priority Critical patent/CN101615455B/en
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Abstract

The invention discloses a vacuum glue-dipping insulation pipe without air gaps and a manufacturing method thereof, relates to an insulation pipe and a manufacturing method thereof, and solves the problems of poor electrical property and mechanical property of the insulation pipe caused by air bubbles, gaps and local layering produced easily among layers of glass fabrics in the prior manufacturingprocess of the insulation pipe. The insulation pipe is formed by winding the glass fabrics, resin glue is dipped in the glass fabrics, and the resin glue is prepared by stirring the following components in portion by weight at the temperature of between 50 and 80 DEG C: 100 portions of modified epoxy resin, 85 portions of curing agent, 10 portions of toughening agent and 3 portions of accelerating agent. The method comprises the following steps: first, designing a core die; second, winding the glass fabrics; third, glue dipping; fourth, primary curing; five, demoulding; six, secondary curing;and seven, removing burrs to obtain the vacuum glue-dipping insulation pipe without the air gaps. The insulation pipe is formed by glue dipping under a vacuum state, and the air bubbles, the gaps andthe local layering are not produced among layers of the glass fabrics, so the electrical property and the mechanical property of the insulation pipe are improved.

Description

The manufacturing approach of vacuum glue-dipping insulation pipe without air gaps

Technical field

The present invention relates to a kind of manufacturing approach of insulated tube.

Background technology

Along with increasing sharply of net capacity; Require high-voltage electrical equipment should possess the performance of big capacity, miniaturization; Dry-type transformer with safety, reliable, energy-conservation, fire prevention, explosion-proof, do not produce pernicious gas; Free from environmental pollution, safeguard advantages such as simple, be widely used on the high-voltage electrical equipment of big capacity, miniaturization; Requiring to have very high electrical strength and mechanical strength for the basic components insulated tube (tube) in the dry-type transformer, otherwise, can not under high voltage electric field, use.The manufacturing approach of existing insulated tube (tube) is with the gluing of glass cloth above and below, then on the rolling machine of special use, the glass cloth of last glue is twisted on the core, and limit crimping heating edge is pressurizeed, and sloughs core after the curing and processes insulated tube (tube); In the said method, because glass cloth surface exists texture uneven, make gluing inhomogeneous, glass cloth will produce bubble, slit, local delamination between each layer glass cloth in the process that rolls, thereby causes insulated tube electric property and bad mechanical property.

Summary of the invention

The objective of the invention is for solving existing insulated tube in manufacture process; Be prone to produce bubble, slit, local delamination between each layer glass cloth; The problem that causes insulated tube electric property and bad mechanical property provides a kind of manufacturing approach of vacuum glue-dipping insulation pipe without air gaps.

Vacuum glue-dipping insulation pipe without air gaps of the present invention is entwined by glass cloth; Be soaked with resin glue in the said glass cloth; Said resin glue is by ratio of weight and the number of copies by 100 parts modified epoxy, 85 parts curing agent, 10 parts flexibilizer and 3 parts promoter, in temperature is to stir under 50 ~ 80 ℃ the condition to form.

The manufacturing approach of vacuum glue-dipping insulation pipe without air gaps of the present invention realizes through following steps: step 1, design core: press the internal diameter design core external diameter of insulated tube, core length is 0.5 ~ 2 meter; Step 2, twine glass cloth: with the core preheating, preheat temperature is that 70 ~ 90 ℃, warm-up time are 20 ~ 40 minutes, and core is contained on the batcher, and glass cloth is wrapped on the core; Be soaked with resin glue in the said glass cloth; Said resin glue is by ratio of weight and the number of copies by 100 parts epoxy resin, 85 parts curing agent, 10 parts flexibilizer and 3 parts promoter; Be to stir under 50 ~ 80 ℃ the condition to form in temperature; Said curing agent is methyl tetrahydro phthalic anhydride or methyl hexahydrophthalic anhydride, and said flexibilizer is that dicarboxylic anhydride gathers the ninth of the ten Heavenly Stems, and said promoter is benzyl dimethylamine; Step 3, impregnation: the core that will be tied with glass cloth is put in the vacuum-latexed machine and vacuumizes, when vacuum degree is evacuated to 0.05 ~ 0.08 MPa, and beginning resin pickup glue, the temperature in the vacuum-latexed machine is 50 ~ 80 ℃, the time of resin pickup glue is 2 ~ 3 hours; Step 4, curing for the first time: will be tied with the core pushing-in rotary type baking oven inner edge rotation limit baked and cured of glass cloth after step 3 is accomplished immediately, curing temperature is 130 ~ 150 ℃, 2 ~ 3 hours curing times; Step 5, the demoulding: the core that will be tied with glass cloth is put on the winding arbor extraction press, deviates from core, obtains the insulated tube woolen cloth; Step 6, the second time solidify: the insulated tube woolen cloth is put in the baking oven cures, stoving temperature is 150 ~ 170 ℃, and the time of curing is 4 ~ 8 hours; Step 7, deburring: remove the processing length at the woollen two ends of insulated tube, remove the burr on the insulated tube woolen cloth, promptly obtain vacuum glue-dipping insulation pipe without air gaps.

Advantage of the present invention is: one, vacuum glue-dipping insulation pipe without air gaps of the present invention is impregnation moulding under vacuum state; Therefore; Do not produce bubble, slit, local delamination between each layer glass cloth, make the electric property of insulated tube and mechanical performance all be improved.Two, the present invention provides electrical strength and the high basic components of mechanical strength for dry-type transformer, and the present invention can be applied on the High-Voltage Electrical Appliances and superhigh pressure electrical equipment equipment under the high electric field strength.

Embodiment

Embodiment one: the insulated tube of this execution mode is entwined by glass cloth; Be soaked with resin glue in the glass cloth; Said resin glue is by ratio of weight and the number of copies by 100 parts epoxy resin, 85 parts curing agent, 10 parts flexibilizer and 3 parts promoter, in temperature is to stir under 50 ~ 80 ℃ the condition to form.Traditional insulated tube manufacturing approach can only be processed the cross section and is circular insulated tube; It is circle, rectangle or ellipse that the insulated tube of this embodiment can twine into the cross section.

Embodiment two: the curing agent of this execution mode is methyl tetrahydro phthalic anhydride or methyl hexahydrophthalic anhydride.The viscosity of methyl tetrahydro phthalic anhydride or methyl hexahydrophthalic anhydride is low, impregnability good.Other composition is identical with embodiment one.

Embodiment three: the flexibilizer of this execution mode is that dicarboxylic anhydride gathers the ninth of the ten Heavenly Stems.Dicarboxylic anhydride gathers and has good toughness effect the ninth of the ten Heavenly Stems.Other composition is identical with embodiment one.

Embodiment four: the promoter of this execution mode is benzyl dimethylamine.Benzyl dimethylamine can shorten the curing time of resin glue.Other composition is identical with embodiment one.

Embodiment five: the following steps of passing through of this execution mode realize: step 1, design core: press the internal diameter design core external diameter of insulated tube, core length is 0.5 ~ 2 meter; Step 2, twine glass cloth: with the core preheating, preheat temperature is that 70 ~ 90 ℃, warm-up time are 20 ~ 40 minutes, and core is contained on the batcher, and glass cloth is wrapped on the core; Twining thickness decides according to the needs of insulated tube.Step 3, impregnation: the core that will be tied with glass cloth is put in the vacuum-latexed machine and vacuumizes, when vacuum degree is evacuated to 0.05 ~ 0.08 MPa, and beginning resin pickup glue, the temperature in the vacuum-latexed machine is 50 ~ 80 ℃, the time of resin pickup glue is 2 ~ 3 hours; Step 4, curing for the first time: will be tied with the core pushing-in rotary type baking oven inner edge rotation limit baked and cured of glass cloth after step 3 is accomplished immediately, curing temperature is 130 ~ 150 ℃, 2 ~ 3 hours curing times; Step 5, the demoulding: the core that will be tied with glass cloth is put on the winding arbor extraction press, deviates from core, obtains the insulated tube woolen cloth; Step 6, the second time solidify: the insulated tube woolen cloth is put in the baking oven cures, stoving temperature is 150 ~ 170 ℃, and the time of curing is 4 ~ 8 hours; Step 7, deburring: remove the processing length at the woollen two ends of insulated tube, remove the burr on the insulated tube woolen cloth, promptly obtain vacuum glue-dipping insulation pipe without air gaps.The model of rotary baking oven is YKZ-100 in the step 4.The model of winding arbor extraction press is YM731B or YM7412 in the step 5.The model of a conventional oven is RXH in the step 6.Curing temperature in the step 4 is lower than 130 ℃, and resin glue does not solidify; Curing temperature is higher than 150 ℃, and the resin glue reaction is too fierce, is easy to generate bubble, influences the impregnation quality.Temperature in the step 3 in the vacuum-latexed machine is 50 ~ 80 ℃, makes the viscosity of resin glue reduce, and makes the impregnability of glass cloth best.Solidifying for the second time is electric property and the mechanical strength in order to improve insulated tube.The diameter that this method can be made insulated tube is that 0.1 ~ 1 meter, minimum thickness are 1 millimeter.The insulated tube air gap content that this method is processed is low, has that dielectric loss is low, mechanical strength is high, indeformable, no layering, suction are few, high pressure resistant, the characteristics of resistance to chemical attack.

Embodiment six: the step 2 core mould preheat temperature of this execution mode is that 80 ℃, warm-up time are 30 minutes.When the core preheat temperature is 80 ℃, can not reduce the temperature of resin glue, make resin glue remain low viscosity in the resin pickup glue starting stage.Other step and embodiment six phase are together.

Embodiment seven: the vacuum degree in the step 3 of this execution mode is 0.07 MPa, and the temperature in the vacuum-latexed machine is 65 ℃, and the time of resin pickup glue is 3 hours.The time of resin pickup glue is long more, and impregnability is good more.Other step and embodiment six phase are together.

Embodiment eight: curing temperature is 140 ℃ in the step 4 of this execution mode, 3 hours curing times.Curing temperature is 140 ℃, and the resin glue reaction is moderate, resin glue is prone to solidify, insulated tube is not easy to produce bubble, the impregnation quality is good.Other step and embodiment six phase are together.

Embodiment nine: stoving temperature is that 160 ℃, the time of curing are 8 hours in the step 6 of this execution mode.Stoving temperature is that 160 ℃, the time of curing are to make the electric property of insulated tube and mechanical strength best in 8 hours.Other step and embodiment six phase are together.

Claims (5)

1. the manufacturing approach of a vacuum glue-dipping insulation pipe without air gaps, it is characterized in that: said method realizes through following steps:
Step 1, design core: press the internal diameter design core external diameter of insulated tube, core length is 0.5~2 meter;
Step 2, twine glass cloth: with the core preheating, preheat temperature is that 70~90 ℃, warm-up time are 20~40 minutes, and core is contained on the batcher, and glass cloth is wrapped on the core; Be soaked with resin glue in the said glass cloth; Said resin glue is by ratio of weight and the number of copies by 100 parts epoxy resin, 85 parts curing agent, 10 parts flexibilizer and 3 parts promoter; Be to stir under 50~80 ℃ the condition to form in temperature; Said curing agent is methyl tetrahydro phthalic anhydride or methyl hexahydrophthalic anhydride, and said flexibilizer is that dicarboxylic anhydride gathers the ninth of the ten Heavenly Stems, and said promoter is benzyl dimethylamine;
Step 3, impregnation: the core that will be tied with glass cloth is put in the vacuum-latexed machine and vacuumizes, when vacuum degree is evacuated to 0.05~0.08 MPa, and beginning resin pickup glue, the temperature in the vacuum-latexed machine is 50~80 ℃, the time of resin pickup glue is 2~3 hours;
Step 4, curing for the first time: will be tied with the core pushing-in rotary type baking oven inner edge rotation limit baked and cured of glass cloth after step 3 is accomplished immediately, curing temperature is 130~150 ℃, 2~3 hours curing times;
Step 5, the demoulding: the core that will be tied with glass cloth is put on the winding arbor extraction press, deviates from core, obtains the insulated tube woolen cloth;
Step 6, the second time solidify: the insulated tube woolen cloth is put in the baking oven cures, stoving temperature is 150~170 ℃, and the time of curing is 4~8 hours;
Step 7, deburring: remove the processing length at the woollen two ends of insulated tube, remove the burr on the insulated tube woolen cloth, promptly obtain vacuum glue-dipping insulation pipe without air gaps.
2. according to the manufacturing approach of the said vacuum glue-dipping insulation pipe without air gaps of claim 1, it is characterized in that: step 2 core mould preheat temperature is that 80 ℃, warm-up time are 30 minutes.
3. according to the manufacturing approach of the said vacuum glue-dipping insulation pipe without air gaps of claim 1, it is characterized in that: the vacuum degree in the step 3 is 0.07 MPa, and the temperature in the vacuum-latexed machine is 65 ℃, and the time of resin pickup glue is 3 hours.
4. according to the manufacturing approach of the said vacuum glue-dipping insulation pipe without air gaps of claim 1, it is characterized in that: curing temperature is 140 ℃ in the step 4,3 hours curing times.
5. according to the manufacturing approach of the said vacuum glue-dipping insulation pipe without air gaps of claim 1, it is characterized in that: stoving temperature is 160 ℃ in the step 6, and the time of curing is 8 hours.
CN2009103053033A 2009-08-06 2009-08-06 Manufacturing method of vacuum glue-dipping insulation pipe without air gaps CN101615455B (en)

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Publication number Priority date Publication date Assignee Title
CN101834042B (en) * 2010-05-21 2011-11-30 成都盛帮密封件股份有限公司 Process of insulating cap for medium-voltage electrical appliances
CN102024536B (en) * 2010-06-30 2011-10-26 苏州贝得科技有限公司 Process for manufacturing insulated sleeve of refrigeration high-voltage motor power terminal
CN102179974B (en) * 2011-01-17 2014-12-31 中电普瑞科技有限公司 Fixed high-strength glass fiber epoxy wrapping belt used for thyristor valve string
CN103117141B (en) * 2011-11-16 2016-05-11 昆山市特种变压器制造有限公司 A kind of processing method of Novel insulating cylinder
CN104867635B (en) * 2015-05-18 2017-04-12 南京电气高压套管有限公司 Processing method for epoxy resin vacuum impregnation glass fiber hollow composite insulator
CN104999607A (en) * 2015-06-18 2015-10-28 西安高强绝缘电气有限责任公司 Manufacturing method of multi-core combined core rod for composite insulator
CN105219046A (en) * 2015-09-06 2016-01-06 江苏恒神股份有限公司 Intermediate temperature setting is wound around resin and preparation method thereof, gained is wound around one-way slabs

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CN101499369A (en) * 2008-10-17 2009-08-05 芜湖市金牛变压器制造有限公司 Material used for dry power transformer and its use method

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CN101499369A (en) * 2008-10-17 2009-08-05 芜湖市金牛变压器制造有限公司 Material used for dry power transformer and its use method

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