CN101740186B - Method for preparing double-stage formed high-voltage compound insulator solid core rod - Google Patents

Method for preparing double-stage formed high-voltage compound insulator solid core rod Download PDF

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Publication number
CN101740186B
CN101740186B CN2010101033822A CN201010103382A CN101740186B CN 101740186 B CN101740186 B CN 101740186B CN 2010101033822 A CN2010101033822 A CN 2010101033822A CN 201010103382 A CN201010103382 A CN 201010103382A CN 101740186 B CN101740186 B CN 101740186B
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diameter
temperature
foaming
core rod
composite insulator
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CN101740186A (en
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吴亚民
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TAIPURUI ELECTROTECHNICAL INSULATION TECHNIQUE CO Ltd SHAANXI
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TAIPURUI ELECTROTECHNICAL INSULATION TECHNIQUE CO Ltd SHAANXI
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Abstract

The invention relates to a method for preparing a double-stage formed high-voltage compound insulator solid core rod. Presently, domestic market has no epoxy glass fiber core rod having a major diameter, particularity a solid core rod having a major diameter applied to a high-voltage support compound insulator having a diameter more than 130 mm. The method comprises the steps of confirming an outer diameter and a wall thickness of a winding tube according to user demand and mechanic load intensity, preparing a high-intensity glass fiber winding tube by pumping vacuum and injecting glue, processing the inner wall of the high-intensity glass fiber winding tube, and secondarily foaming the hole in the tube by a high-pressure foaming machine. The high-temperature material which can bear 170 DEG C is chosen as the foaming material in order to meet the demand of compound insulator chute boot and silicon rubber vulcanizing molding technique. The products prepared by using the method of the invention can replace a major-diameter solid core rod in order to meet the use demand of a compound insulator core.

Description

The preparation method of the high-voltage composite insulator solid mandrel of two one-step formings
Technical field:
The present invention relates to high-voltage composite insulator manufacturing technology field, be the preparation method of the high-voltage composite insulator solid mandrel of two one-step formings specifically, particularly the above high-voltage composite insulator of 500KV is with the preparation method of the above high-strength epoxy glass fibre of major diameter diameter 130mm solid mandrel.
Background technology:
Composite insulator is made up of plug (core body), gold utensil, silicon rubber umbrella cover three parts, insulation and transmission mechanical load in plug plays a part, and the silicon rubber umbrella cover plays the external insulation effect, and gold utensil plays two ends and connects.Wherein the plug effect is the most important and crucial.Plug as interior insulation is divided into solid mandrel and hollow plug, is called hollow combined insulator with the product of hollow plug production, has following three kinds: suspended compound insulator rod type, column support type composite insulator and the curved wall composite insulator of model.
Still be that the requirement of length aspect all is resolved worldwide at present as the hollow combined insulator diameter.But composite insulator solid core rob is because the designing requirement of product and the inherent shortcoming of existing technology, particularly large diameter epoxy glass fiber plug is in particular for the domestic report of producing product that yet there are no of the major diameter solid mandrel more than the high voltage post composite insulator diameter 130mm.
Existing used in composite insulator epoxy glass fiber solid mandrel is general to adopt continuous pultrude process production, continuously pultrude process comprise the guide operation, through hauling machine traction impregnation unit impregnation, in mould hot briquetting, secondary surface cure district, pultrusion depanning continuously.Wherein, fiber enters glue drill traverse glue by the silk tube through Yarn guide mechanism, and the fiber behind the impregnation enters in the hot mould and solidifies depanning; In the curing molding process, heat is to be sent on the mould of solid shape by the moulding press hot plate.
Be subjected to existing process technology limit, pultrude process can't realize that diameter is very low greater than the preparation or the success rate of the epoxy glass plug of 130mm continuously.Reason is as follows, and the major diameter plug is in the curing molding process, because diameter of mandrel is bigger, it is slower that the heat on the mould is sent to the speed of plug inside; If moulding glass plug slows down firing rate to the inner full solidification of plug in the hot briquetting process, plug will be bonded on the mould, during depanning the draw-gear pultrusion motionless, have the danger that destroys mould if strengthen pulling force; If according to existing heating condition, solidify plug depanning rear surface, but plug inside may still be semi-cured state, under the cooling normal temperature state, is subjected to the internal stress effect, and plug is prone to cracking.
Summary of the invention:
The preparation method who the purpose of this invention is to provide the high-voltage composite insulator solid mandrel of two above one-step formings of a kind of diameter 130mm.
For realizing above-mentioned technical problem, technical scheme of the present invention is:
Manufacture continual closed pore foaming core body with high pressure foaming machine earlier, on closed pore foaming core body, be furnished with multilayer longitudinal fiber and hoop fiber winding yarn, enter preforming tool simultaneously and adopt vacuum injecting glue method, the impregnation heating cure, closed-cell foam core body and fiber reinforced resin layer are bonding more firm like this.
Compared with prior art, the advantage and the effect that have of the present invention is as follows:
1, manufactures continual closed pore foamed insulation core body with high pressure foaming machine;
2, closed pore foamed insulation core body enters mould impregnation curing molding simultaneously with hoop and longitudinal fiber, and overall structure is more firm;
3, the impregnation mode adopts vacuum injecting glue method, and product is fine and close more.
Description of drawings:
Fig. 1 is traditional pultrude process figure;
Fig. 2 is the making large-diameter and high-strength composite insulator core body schematic diagram of two one-step formings;
Fig. 3 is that two one-step forming legal systems are made major diameter mandrel process flow chart.
Description of reference numerals is as follows:
The 1-Yarn guide mechanism, 2-steeping vat, 3-mould, 4-regelate district, 5-draw-gear, 6-high pressure foaming machine, 7-preforming tool, 8-hole for injecting glue.
Embodiment:
Referring to Fig. 1, common extruding equipment, glass fibre places on the creel through Yarn guide mechanism 1, by steeping vat 2 epoxy resin-impregnated glue, extrude unnecessary resin glue by the Frictioning device at die entrance place, enter mould 3 curing moldings that the heating wire heating is housed, pass through regelate district 4 further curing moldings again, draw-gear 5 is basic mechanical parts of extruding equipment, and the assurance product is pulled out with certain speed.
Common extruding equipment Fiber Distribution all is with vertical arrangement, so hoop intensity difference, pultrusion technique and winding technology organically combine on the basis of common extruding equipment for this reason, it is low to overcome the drawing and extruding section bar transverse strength, wrapped tube production efficiency is low, waste high shortcoming, is the liberation again of fiberglass industry production power.Manufacture large-diameter and high-strength composite insulator core body by following improvement.
Referring to Fig. 2, the present invention manufactures continual closed pore foaming core body with high pressure foaming machine 6 earlier, on closed pore foaming core body, be furnished with multilayer longitudinal fiber and hoop fiber winding yarn, enter preforming tool 7 simultaneously, adopt the heating cure of vacuum injecting glue method impregnation, closed-cell foam core body and fiber reinforced resin layer are bonding more firm like this.
Manufacture large-diameter and high-strength composite insulator core body by following improvement:
(1) presses customer requirements and mechanical load intensity, determine winding pipe external diameter, wall thickness, make the high strength glass fiber winding pipe with vacuumizing the injecting glue legal system;
(2) the high strength glass fiber inside pipe wall is handled, carried out second time of foaming with 6 pairs of pipe orifices of high pressure foaming machine;
(3) expanded material is selected the exotic material of anti-170 ℃ of high temperature for use, so that satisfy composite insulator umbrella cover, the requirement of silicon rubber vulcanization moulding process.
Determine winding pipe external diameter, wall thickness by customer requirements design, setting mechanical load intensity, do high-strength epoxy glass fibre winding pipe with vacuumizing the injecting glue legal system, and inside pipe wall handled, carry out second time of foaming with 6 pairs of endoporus of high pressure foaming machine then, to reach the purpose of sealing, insulation, the alternative major diameter solid mandrel of its product satisfies the instructions for use of composite insulator core body.
Concrete implementation detail:
(1) determines external diameter, wall thickness by customer requirements design, setting mechanical load intensity;
(2) choose suitable core, be installed on the numerical control winding machine, the input relevant parameter, diameter, length, winding angle etc. are wound into the diameter dimension of regulation, and twining used fiber is the acidproof ECR560A-2400Tex of alkali-free;
(3) twine the outer surface parcel release cloth that finishes, water conservancy diversion net and vacuum bag, vacuumize the injection resin glue, used epoxy resin is E-44 or E-51, select for use curing temperature low, the modified imidazole class curing agent glyoxal ethyline of good manufacturability and good mechanical performance and acid anhydride type curing agent modified methyl tetrahydrophthalic anhydride or methyl hexahydrophthalic anhydride are used, can obtain the resin system prescription that intermediate temperature setting high temperature uses, and add strange scholar's epoxy toughening agent 2%, active micro silicon powder 5%, vacuum stirring 20 minutes, left standstill above-mentioned epoxy resin: acid anhydride type curing agent 50 minutes: glyoxal ethyline=100: 100: 10;
(4) injecting glue finishes and closes the two ends valve and put into the curing oven ladder of heating and solidify curing temperature: room temperature is reduced in 60 ℃ 1 hour → 80 ℃ 1 hour → 100 ℃ 2 hours → 120 ℃ insulations in 2 hours;
(5) goods that are cured are sloughed the pipe inner mold, and the processing outer surface is removed vacuum bag, water conservancy diversion net, release cloth, and the sanding surface is by the customer requirement length scaling;
(6) hollow glass fibre is twined the insulated tube inwall and carry out grinding process, cleaning dust;
(7) hollow glass fibre is twined insulated tube and be warmed to 60 ℃, constant temperature carried out the polyurethane foaming with 6 pairs of endoporus of high pressure foaming machine and handles after 1 hour;
(8) expanded material is selected the exotic material of anti-170 ℃ of high temperature for use, satisfies the requirement of composite insulator umbrella cover silicon rubber vulcanization moulding process after being convenient to.

Claims (2)

1. the preparation method of the high-voltage composite insulator solid mandrel of two one-step formings, it is characterized in that: described preparation method is as follows:
(1) manufactures continual closed pore foaming core body with high pressure foaming machine, on closed pore foaming core body, be furnished with multilayer longitudinal fiber and hoop fiber winding yarn, enter preforming tool simultaneously;
(2) press customer requirements and mechanical load intensity, determine winding pipe external diameter, wall thickness, make the high strength glass fiber winding pipe with vacuumizing the injecting glue legal system;
(3) the high strength glass fiber inside pipe wall is handled, pipe orifice is carried out second time of foaming with high pressure foaming machine;
(4) expanded material is selected the exotic material of anti-170 ℃ of high temperature for use, so that satisfy composite insulator umbrella cover, the requirement of silicon rubber vulcanization moulding process.
2. the preparation method of the high-voltage composite insulator solid mandrel of two one-step formings according to claim 1 is characterized in that: described preparation method is as follows:
(1) manufactures continual closed pore foaming core body with high pressure foaming machine, on closed pore foaming core body, be furnished with multilayer longitudinal fiber and hoop fiber winding yarn, enter preforming tool simultaneously;
(2) determine external diameter, wall thickness by customer requirements design-calculated mechanical load intensity;
(3) choose core, be installed on the numerical control winding machine, the input relevant parameter, is harassed and disturbed the angle at diameter, length, is wound into the diameter dimension of regulation, and twining used fiber is the acidproof ECR560A-2400Tex of alkali-free;
(4) twine finish outer surface parcel release cloth, water conservancy diversion net and vacuum bag, vacuumize the injection resin glue, used epoxy resin is E-44 or E-51, select that curing temperature is low for use, the modified imidazole class curing agent glyoxal ethyline of good manufacturability and good mechanical performance and acid anhydride type curing agent modified methyl tetrahydrophthalic anhydride or methyl hexahydrophthalic anhydride be used, can obtain the resin system prescription that intermediate temperature setting high temperature uses, and add strange scholar's epoxy toughening agent 2%, active micro silicon powder 5%, vacuum stirring 20 minutes left standstill 50 minutes; Above-mentioned epoxy resin: acid anhydride type curing agent: glyoxal ethyline=100:100:10;
(5) injecting glue finishes and closes the two ends valve and put into the curing oven ladder of heating and solidify curing temperature: 60 ℃ 1 hour 80 ℃ 1 hour 100 ℃ 2 hours Room temperature is reduced in 120 ℃ of insulations in 2 hours;
(6) goods that are cured are sloughed the pipe inner mold, and the processing outer surface is removed vacuum bag, water conservancy diversion net, release cloth, and the sanding surface is by the customer requirement length scaling;
(7) hollow glass fibre is twined the insulated tube inwall and carry out grinding process, cleaning dust;
(8) hollow glass fibre is twined insulated tube and be warmed to 60 ℃, constant temperature carried out the polyurethane foaming with high pressure foaming machine to endoporus and handles after 1 hour;
(9) expanded material is selected the exotic material of anti-170 ℃ of high temperature for use, satisfies the requirement of composite insulator umbrella cover silicon rubber vulcanization moulding process after being convenient to.
CN2010101033822A 2010-01-29 2010-01-29 Method for preparing double-stage formed high-voltage compound insulator solid core rod Active CN101740186B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101914266B (en) * 2010-07-30 2012-03-07 温州市龙电绝缘材料有限公司 Insulating material for motor collecting ring
CN106142593B (en) * 2015-04-10 2019-11-26 科思创德国股份有限公司 The method for manufacturing article of fiber reinforced plastics
CN105711033B (en) * 2016-03-18 2018-05-04 西安高强绝缘电气有限责任公司 A kind of production method of major diameter single injection drawing and extruding bar
CN106448958B (en) * 2016-10-25 2017-11-17 北京玻钢院复合材料有限公司 Precast body, core rod of insulator and the preparation method of non-resin winding
CN106910575B (en) * 2017-03-31 2018-07-03 西安康本材料有限公司 A kind of high-performance post composite insulator plug and its manufacturing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1267063A (en) * 2000-04-14 2000-09-20 清华大学 Liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator
CN1285596A (en) * 1999-08-20 2001-02-28 上海东南电力科技发展有限公司 Composite electric insulator core bar and making technology thereof
CN1530216A (en) * 2003-03-14 2004-09-22 云 白 Fibreglass reinforced epoxy resin insulator core rod producing technology and apparatus
CN201240034Y (en) * 2008-05-29 2009-05-20 白玉成 Composite long rod insulator injection molding machine
CN101494107A (en) * 2009-03-10 2009-07-29 西安高强绝缘电气有限责任公司 Method for producing sandstorm resistance insulator core pin with umbrella for railway

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1285596A (en) * 1999-08-20 2001-02-28 上海东南电力科技发展有限公司 Composite electric insulator core bar and making technology thereof
CN1267063A (en) * 2000-04-14 2000-09-20 清华大学 Liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator
CN1530216A (en) * 2003-03-14 2004-09-22 云 白 Fibreglass reinforced epoxy resin insulator core rod producing technology and apparatus
CN201240034Y (en) * 2008-05-29 2009-05-20 白玉成 Composite long rod insulator injection molding machine
CN101494107A (en) * 2009-03-10 2009-07-29 西安高强绝缘电气有限责任公司 Method for producing sandstorm resistance insulator core pin with umbrella for railway

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