CN102136325B - Light foam sandwich composite material insulating rod and preparation methods thereof - Google Patents
Light foam sandwich composite material insulating rod and preparation methods thereof Download PDFInfo
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- CN102136325B CN102136325B CN2010105910560A CN201010591056A CN102136325B CN 102136325 B CN102136325 B CN 102136325B CN 2010105910560 A CN2010105910560 A CN 2010105910560A CN 201010591056 A CN201010591056 A CN 201010591056A CN 102136325 B CN102136325 B CN 102136325B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
- B29C70/086—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of pure plastics material, e.g. foam layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
- B29C70/865—Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
- B29K2995/0007—Insulating
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Abstract
The invention discloses a light foam sandwich composite material insulating rod. The insulating rod comprises an insulation cylinder and sandwich rods filled in the insulation cylinder. The insulating rod is characterized in that the insulation cylinder is made of epoxy resin based composite materials; the sandwich rods are made of light foam materials; the inner wall of the insulation cylinder and the outer walls of the sandwich rods are tightly fit; and the epoxy resin materials forming the insulation cylinder matrix are filled in the pores of the outer walls of the sandwich rods. The invention also provides three preparation methods of the insulating rod. The first preparation method comprises the steps of firstly forming a light foam sandwich rod, then winding reinforcing materials and impregnating the obtained product in epoxy resin glue solution. The second preparation method comprises the steps of firstly forming a light foam sandwich rod, directly winding pre-impregnated reinforcing materials and then curing the obtained product to obtain the product. The third preparation method comprises the steps of forming a hollow light foam sandwich cylinder, then winding reinforcing materials and spraying epoxy resin glue solution on the reinforcing materials, curing the obtained product and then foaming and filling the hollow parts to obtain the product. The insulating rod has the advantages of simple preparation process, light finished product mass, high bending resistance, good mechanical property, low cost, no hidden danger of interface breakdown and the like.
Description
Technical field
The present invention relates to power equipment and use the composite insulator field, relate in particular to interior insulating composite material rod of a kind of post composite insulator and preparation method thereof.
Background technology
Post insulator is that power equipments such as high voltage isolator, bus support, reactor support are used critical component, is ceramic mostly at present.This ceramic leg insulator belongs to the high energy consumption product, and its Heavy Weight, rapid wear are prone to break, shock resistance is low and running also has explosion hazard.Occurred composite post insulator in recent years, but the anti-bending strength of composite post insulator can't match in excellence or beauty with porcelain strut insulator.For anti-bending strength and the crooked offset problem that solves composite post insulator; People adopt the solid alkali-free glass fibre reinforced epoxy of major diameter based composites rod to be interior insulation mostly, and the cracking problem that this major diameter solid epoxy fiberglass rod exists in forming process is difficult to thorough solution; Simultaneously the molding process of major diameter solid composite expoxy glass rod iron faces also that step is many, difficulty is big, the cycle is long and defect of high cost, and this also becomes the significant obstacle that influences the composite post insulator popularization.
For the composite post insulator of voltage levels; Because its size is bigger; The solid epoxy fiberglass rod can't pultrusion; Adopt hollow alkali-free glass fibre reinforced epoxy based composites tube as interior insulating component at present mostly, the insulating gas of inner filling certain pressure during operation.Adopt this method can bring such as additional work such as sealing, monitoring, tonifying Qi, the reliability of insulator is difficult to guarantee, and has potential safety hazard.For this reason; Also there is the method that adopts inner filling liquid or solid-state dielectric at present; But there are problems such as sealing difficulty, manufacturing cost height equally in liquid dielectric; And there is the handling problem of filler and insulating cylinder inwall faying face in solid-state dielectric, and faying face is handled bad, possibly cause internal breakdown.
Summary of the invention
Technical problem to be solved by this invention is: to the deficiency of prior art, a kind of light weight, high, the crooked light foam core filled composite material insulating rod little, that mechanicalness good, cost is low, no interface punctures hidden danger that squints of anti-bending strength are provided; And three kinds of technology simple, can make light foam core and the epoxy resin-base composite material layer faying face preparation method of light foam core filled composite material insulating rod more closely.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of light foam core filled composite material insulating rod; Comprise the sandwich rod of filling in outside insulating cylinder and the insulating cylinder; It is characterized in that: said insulating cylinder is that epoxy resin-base composite material is processed, and said sandwich rod is processed for light foam material, fits tightly between said insulating cylinder inwall and the said sandwich rod outer wall; And the epoxide resin material that constitutes the insulating cylinder matrix is filled in the hole of said sandwich rod outer wall (in the process of said light foam material moulding sandwich rod, can form the aperture of a greater number at the outer wall of sandwich rod).
Further improvement as insulating rod of the present invention:
In the above-mentioned insulating rod, preferably be provided with reinforcement on the inwall of said insulating cylinder, said sandwich rod outer wall is provided with and the close-fitting reinforcement groove of said reinforcement.
In the above-mentioned insulating rod, the reinforcing material of said insulating cylinder is preferably alkali-free glass fibre, alkali-free glass fiber cloth, alkali-free glass fibre felt, mylar or polyester felt.
In the above-mentioned insulating rod, said light foam material preferred density is 200 kg/m
3～300 kg/m
3Polyurethane foamed material.Adopt polyurethane foam material as inner core, the trouble of filling dielectric in the time of can exempting the product operation has also been eliminated difficulty and the product quality increase of sandwich rod when mold releasability seldom.
As a total technical conceive, the present invention also provides the preparation method of three kinds of above-mentioned light foam core filled composite material insulating rods.
Preparation method one may further comprise the steps:
(1) preparation light foam sandwich rod: prepare light foam sandwich rod, and on its outer wall, offer the reinforcement groove;
(2) reinforcing material is reeled: at the reinforcing material of the said insulating cylinder of said light foam sandwich rod outside shop winding number circle; Be filled in the said reinforcement groove with prefabricated strengthening rib strip then; Continue the coiling reinforcing material again until the external diameter that reaches the insulating rod requirement, said reinforcing material is carried out vacuum drying treatment;
(3) vacuum impregnation: the reel that obtains after with above-mentioned steps (2) with epoxy resin adhesive liquid carries out vacuum-latexed to be handled, and the vacuum pressure when vacuum-latexed is handled is below 100Pa, and the impregnation time is at 90min～150min;
(4) cure and demold: the impregnation reel to obtaining after the above-mentioned steps (3) is heating and curing, and curing temperature is 80 ℃～160 ℃, and be 8h～16h curing time, and cooling after curing is accomplished, the demoulding obtain light foam core filled composite material insulating rod.
Preparation method two may further comprise the steps:
(1) preparation light foam sandwich rod: prepare light foam sandwich rod, and on its outer wall, offer the reinforcement groove;
(2) equipment of preimpregnated material manufacture: cure behind the reinforcing material epoxy resin-impregnated glue with said insulating cylinder, make resin be in semi-cured state, rolling obtains prepreg;
(3) prepreg is reeled: the winding number circle is filled in the reinforcement groove with prefabricated strengthening rib strip through the prepreg of preheating again on said light foam sandwich rod upper berth, and the continued that is fastened coiling prepreg is until the external diameter that reaches said insulating rod requirement;
(4) solidify: the reel that obtains after the above-mentioned steps (3) is heating and curing under rotary state, and curing temperature is 80 ℃～160 ℃, and be 8h～16h curing time, and cooling after curing is accomplished obtains light foam core filled composite material insulating rod.
Preparation method three comprises following steps:
(1) preparation light foam sandwich rod: preparation one is embedded with the light foam sandwich tube of metal mandrel, and on its outer wall, offers the reinforcement groove;
(2) reinforcing material twines: at the reinforcing material of the said insulating cylinder of light foam sandwich tube upper berth winding number circle that is embedded with the metal mandrel; Use the epoxy resin adhesive liquid for preparing to drench and soak into said reinforcing material; Be filled in the said reinforcement groove with prefabricated strengthening rib strip, the reinforcing material that epoxy resin adhesive liquid has been flooded in the continuation winding is until reaching the external diameter that said insulating rod requires again;
(3) solidify: the reel that obtains after the above-mentioned steps (2) is heating and curing under rotary state, and curing temperature is 80 ℃～160 ℃, and be 8h～16h curing time, cooling after curing is accomplished;
(4) core is filled: the metal mandrel in the above-mentioned light foam sandwich tube is extracted out, filled up light foam material in the hollow position perfusion, obtain light foam core filled composite material insulating rod.
Epoxy resin is heating and curing in the process; Epoxy resin infiltrates the outer wall surface layer of the sandwich rod of light foam/sandwich tube; After the curing, the epoxide resin material that constitutes the insulating cylinder matrix is filled in the hole of said sandwich rod outer wall, and insulating cylinder becomes as a whole with the sandwich rod.
Further improvement as above-mentioned three kinds of preparation methods:
Among the above-mentioned preparation method; The said preferred concrete operations that are heating and curing are: be heated to insulation 1.5h～2h under 80 ℃ of temperature conditions; Be warmed up to 100 ℃ of insulation 1h～2h, be warmed up to 130 ℃ of insulation 1h～2h again, be warmed up to 145 ℃ of insulation 1.5h～4.5h again; Be warmed up to 160 ℃ of insulation 4h～6h again, completion is heating and curing.
Among the above-mentioned preparation method, said epoxy resin adhesive liquid preferably comprises:
The epoxy resin of 1000 mass parts,
The epoxide resin reactive flexibilizer of 45～55 mass parts,
The coupling agent of 10～20 mass parts,
800～1000 mass parts acid anhydrides,
The dicyandiamide of 0～40 mass parts with
The curing accelerator of 5～8 mass parts.
Among the above-mentioned preparation method, said prefabricated strengthening rib strip is preferably polyurethane foam bar or alkali-free glass fibre reinforced epoxy based composites bar.
Compared with prior art, the invention has the advantages that:
1, light foam core filled composite material insulating rod of the present invention; Adopt light foam material sandwich rod and outside epoxy resin-base composite material insulating cylinder and the structure of combining closely between the two; Not easy to crack; Can satisfy the mechanical performance requirement, and reduce the weight of insulating rod greatly, reduce production cost;
2, light foam core filled composite material insulating rod of the present invention; Take on the sandwich rod to be provided with mode with the close-fitting reinforcement groove of said reinforcement; Can on the inwall of insulating cylinder, reinforcement can be set arbitrarily, press and torsional property with the bending resistance that improves insulating cylinder under the equal wall thickness condition, anti-hoop; And under the condition that satisfies product bending resistance, mechanical performance such as antitorque, greatly reduce the weight and the cost of solid composite post insulator; Simultaneously, exempted charging and discharging the dielectric trouble caused in the running, promoted for composite post insulator and paved road;
3, the preparation method of light foam core filled composite material insulating rod of the present invention, technology is simple, the core that adopts the light foam sandwich to lay as outer reinforcing material.Core is embedded in insulated tube inside in outer field epoxy resin-base composite material layer insulating cylinder forming process, form insulating rod jointly with the epoxy resin-base composite material layer.This just guarantee resin to the reinforcing material dipping process in, not only infiltrate reinforcing material shop layer, also infiltrate the foam core superficial layer; The rough space that the foam core surface blister forms is just in time filled by resin fully; Behind the resin solidification, the two forms an integral body, and its combination interface globality is better.
Description of drawings
Fig. 1 is the cross sectional representation of the light foam core filled composite material insulating rod of the embodiment of the invention;
Fig. 2 is the cross sectional representation of the light foam core filled composite material insulating rod of another execution mode in the embodiment of the invention 1;
Fig. 3 is the cross sectional representation of the light foam sandwich tube that is embedded with the metal mandrel of the embodiment of the invention 3;
Fig. 4 is the sectional structure sketch map at A-A place among Fig. 3.
Marginal data:
1, sandwich rod; 2, insulating cylinder; 3, reinforcement groove; 4, reinforcement; 5, metal mandrel.
Embodiment
Below will combine Figure of description and specific embodiment that the present invention is explained further details.
Embodiment 1: as shown in Figure 1; Light foam core filled composite material insulating rod of the present invention comprises outside insulating cylinder 2 and insulating cylinder 2 interior sandwich rods 1 of filling, and insulating cylinder 2 is processed for epoxy resin-base composite material; Sandwich rod 1 is processed for light foam material; Fit tightly between insulating cylinder 2 inwalls and sandwich rod 1 outer wall, and the epoxide resin material that constitutes insulating cylinder 2 matrixes is filled in the hole of sandwich rod 1 outer wall (hole of considering outer wall is very little, and hole is not shown among the figure).The inwall of insulating cylinder 2 is provided with reinforcement 4, and sandwich rod 1 outer wall is provided with and reinforcement 4 close-fitting reinforcement grooves 3.The reinforcing material of insulating cylinder 2 is alkali-free glass fiber cloth (alkali-free glass fibre, alkali-free glass fibre felt, mylar or a polyester felt etc. all can).Light foam material is that density is about 250 kg/m
3Polyurethane foamed material.
This light foam core filled composite material insulating rod prepares through the following step:
(1) material is prepared:
A. preparing density is 250 ± 20 kg/m
3Reinforcing material such as polyurethane foam material and alkali-free glass fiber cloth;
B. get the epoxy resin of 1000 parts (being mass parts, down together), 50 parts epoxide resin reactive flexibilizer, 15 parts coupling agent, 900 parts acid anhydrides and 6 parts curing accelerator configuration epoxy resin adhesive liquid;
C. prepare the cylindrical die (consistent size of the sectional dimension of raised line and the reinforcement of design 4) that is used to prepare sandwich rod 1 that inwall is provided with movable raised line, and prepare to be used for the integrally forming mould of profiled insulation rod.
(2) preparation light foam sandwich rod: get above-mentioned cylindrical die; The two ends of closed mould, and charging aperture and steam vent are set, the polyurethane foam material is evenly mixed the back inject in the mould; Treat that foaming finishes; The groove of superficial layer and moulding is removed in the demoulding, promptly obtains the pole shape light foam sandwich rod that outer wall has reinforcement groove 3.
(3) reinforcing material is reeled:, behind 2 layers～5 layers alkali-free glass fiber cloth, be filled in the reinforcement groove 3 with foam strip (or alkali-free glass fibre reinforced epoxy based composites bar) in the light foam folder mandrel outer shop that obtains.Reinforcement groove 3 is filled and is finished, and continues the external diameter that the coiling alkali-free glass fiber cloth reaches the insulating rod requirement, places it in the drying oven, is warmed up to about 100 ℃, carries out vacuum drying treatment 2h～5h.
(4) vacuum impregnation: the light foam sandwich rod of the dried reinforcing material of having reeled packed into is used for the integrally forming mould of profiled insulation rod, and links to each other with the vacuum-latexed system, one side to the integrally forming mould extracting vacuum; Epoxy resin adhesive liquid is carried out vacuum degassing on one side; The vacuum pressure that the resin degassing and integrally forming mould vacuumize continue to be lower than 100Pa reach 120min (big like fruit product, the pumpdown time can prolong) above after, the infusion epoxy resin glue; After filling; Sealing integrally forming mould upper end is removed the vacuum-latexed system, and integrally forming mould is overturn.
(5) cure and demold: the above-mentioned integrally forming mould that is full of resin that obtains is placed in the curing oven, is transferred at air pressure under the nitrogen atmosphere of 0.1Mpa～0.3Mpa, open temperature control system and be heating and curing.Be heated to insulation 1.5h under 80 ℃ of temperature conditions, be warmed up to 100 ℃ of insulation 1.5h, be warmed up to 130 ℃ of insulation 1h again; Be warmed up to 145 ℃ of insulation 1.5h again; Be warmed up to 160 ℃ of insulation 5h again, completion is heating and curing, and reduces to room temperature naturally; Take out mould and carry out the demoulding, obtain above-mentioned light foam core filled composite material insulating rod.
As shown in Figure 2; Light foam core filled composite material insulating rod of the present invention also can be with reinforcement; In the preparation; The mould of inner no activity raised line is adopted in the moulding of light foam sandwich rod, and the step that follow-up step is omitted with foam strip (or alkali-free glass fibre reinforced epoxy based composites bar) filling reinforcement groove 3 gets final product.
It is high that the preparation method of the light foam core filled composite material insulating rod of present embodiment is suitable for the production insulating requirements, the post that size is little, rod.
Embodiment 2: as shown in Figure 1; Insulating rod structure and composition among light foam core filled composite material insulating rod of the present invention and the embodiment 1 are basic identical; Its difference only is reinforcing material difference to some extent, and the reinforcing material that present embodiment is used is alkali-free glass fibre and alkali-free glass fiber cloth.This light foam core filled composite material insulating rod prepares through the following step:
(1) material is prepared:
A. prepare unit weight and be about 250 ± 20 kg/m
3Reinforcing materials such as polyurethane foam, alkali-free glass fibre and alkali-free glass cloth;
B. get 1000 parts epoxy resin, 50 parts epoxide resin reactive flexibilizer, 15 parts coupling agent, 900 parts of acid anhydrides, the dicyandiamide of 40 mass parts and curing accelerator configuration epoxy resin adhesive liquids of 7 parts;
C. prepare the cylindrical die (consistent size of the sectional dimension of raised line and the reinforcement of design 4) that is used to prepare sandwich rod 1 that inwall is provided with movable raised line.
(2) preparation light foam sandwich rod: take in the cylindrical die of preparation sandwich rod 1; The two ends of closed mould, and charging aperture and steam vent are set, the polyurethane foam material is evenly mixed the back inject in the mould; Treat that foaming finishes; The demoulding, the groove after removing superficial layer and the moulding promptly obtains the pole shape light foam sandwich rod that outer wall has reinforcement groove 3.
(3) equipment of preimpregnated material manufacture:
With curing behind reinforcing material fabric and the fiber impregnation epoxy resin adhesive liquid, make resin be in the semi-solid preparation stage (B stage), rolling obtains preimpregnation cloth and preimpregnation yarn.
(4) prepreg is reeled:
The light foam sandwich rod that processes is installed on the up-coiler; Open up-coiler; The preimpregnation cloth reinforcing material after 2 layers～4 layers preheating on light foam sandwich rod upper berth is pressed into groove with the alkali-free glass fibre reinforced epoxy based composites bar (or polyurethane foam bar) that processes with preimpregnation cloth again, is fastened with the preimpregnation yarn outside simultaneously; Continue coiling preimpregnation cloth to given size, last hoop twines one deck preimpregnation yarn for 90 °.
(5) solidify:
With the above-mentioned coiling that obtains the light foam sandwich rod of reinforcing material, be placed on the carriage of curing oven, under rotary state with resin solidification.Solidifying heater is made as: be heated to insulation 2h under 80 ℃ of temperature conditions; Be warmed up to 100 ℃ of insulation 1.5h, be warmed up to 130 ℃ of insulation 1h again, be warmed up to 145 ℃ of insulation 2h again; Be warmed up to 160 ℃ of insulation 4h again; Completion is heating and curing, and reduces to room temperature naturally, obtains above-mentioned light foam core filled composite material insulating rod.
The preparation method of the light foam core filled composite material insulating rod of present embodiment is suitable for producing members such as oversize insulation column, high-voltage line shaft tower.
Embodiment 3: as shown in Figure 1; Insulating rod structure and composition among light foam core filled composite material insulating rod of the present invention and the embodiment 1 are basic identical; Its difference only is that reinforcing material difference to some extent, the reinforcing material that present embodiment is used are alkali-free glass fibre, alkali-free glass fibre felt and alkali-free glass fiber cloth.This light foam core filled composite material insulating rod prepares through the following step:
(1) material is prepared:
A. preparing unit weight is 250 ± 20 kg/m
3Reinforcing materials such as polyurethane foam, alkali-free glass fibre felt, alkali-free glass fiber cloth and alkali-free glass fibre;
B. get 1000 parts epoxy resin, 50 parts epoxide resin reactive flexibilizer, 15 parts coupling agent, 900 parts acid anhydrides and 5 parts curing accelerator configuration epoxy resin adhesive liquid;
C. prepare the cylinder shape mould and the metal mandrel 5 (consistent size of the sectional dimension of raised line and the reinforcement of design 4) of two halves that is used to prepare sandwich rod 1 that inwall is provided with movable raised line.
(2) preparation light foam sandwich rod
The cylinder shape mould and the metal mandrel 5 that will be used to prepare sandwich rod 1 are combined, the two ends of closed mould, and charging aperture and steam vent are set; The polyurethane foam material is evenly mixed the back to be injected in the mould; Treat that foaming finishes demoulding, finished surface and two ends; The cleaning groove obtains like Fig. 3, the light foam sandwich tube that is embedded with the metal mandrel shown in Figure 4.
(3) reinforcing material twines:
The light foam sandwich tube that is embedded with the metal mandrel that obtains is installed on the wrapping machine, opens wrapping machine the light foam sandwich tube that is embedded with the metal mandrel is rotated, spread above that around 2 layers of alkali-free glass fibre felt; Repave around 4 layers of alkali-free glass fiber cloth; Epoxy resin adhesive liquid with preparing drenches, and roll-in repeatedly makes epoxy resin soak into fabric; Fabric on the reinforcement groove 3 is pressed in the groove, itself and the light foam sandwich tube that is embedded with the metal mandrel are close together.The glass steel bar that processes (or polyurethane foam bar) is inserted in the reinforcement groove 3, tied up several roads, in order to avoid in being embedded with the light foam sandwich tube rotary course of metal mandrel, come off with alkali-free glass fibre.After this twine alkali-free glass fibre (during practical application, the line style of alkali-free glass fibre can be decided as the case may be) that epoxy resin adhesive liquid soaks continuously up to predetermined outside diameter.
(4) solidify:
With the above-mentioned winding that obtains the light foam sandwich tube that is embedded with the metal mandrel of reinforcing material, be placed on the carriage of curing oven, under rotary state with resin solidification.Solidifying heater is made as: be heated to insulation 2h under 80 ℃ of temperature conditions, be warmed up to 100 ℃ of insulation 2h, be warmed up to 130 ℃ of insulation 1h again; Be warmed up to 145 ℃ of insulation 1.5h again; Be warmed up to 160 ℃ of insulation 6h again, completion is heating and curing, and reduces to room temperature naturally; Obtain the insulating rod base substrate, base substrate is machined.
(5) core is filled:
Metal mandrel in the light foam sandwich tube that is embedded with the metal mandrel 5 is extracted out, removed the superficial layer of the inside pipe wall of hollow position, block an end, inject a certain amount of polyurethane foam material, build the other end.Treat that foaming finishes, the unnecessary foamed material in cleaning two ends obtains above-mentioned light foam core filled composite material insulating rod.
The preparation method of the light foam core filled composite material insulating rod of present embodiment is suitable for production medium size post insulator plug, can reduce the mould input.
It below only is preferred implementation of the present invention; Protection scope of the present invention also not only is confined to the foregoing description; Strengthen etc. as in light foam sandwich rod, adding reinforcing materials such as glass fiber, the various technical schemes of conceiving no substantial differences with the present invention are all in protection scope of the present invention.
Claims (8)
1. light foam core filled composite material insulating rod; Comprise the sandwich rod (1) of filling in outside insulating cylinder (2) and the insulating cylinder (2); It is characterized in that: said insulating cylinder (2) is processed for epoxy resin-base composite material; Said sandwich rod (1) is processed for light foam material, fit tightly between said insulating cylinder (2) inwall and said sandwich rod (1) outer wall, and the epoxide resin material of formation insulating cylinder (2) matrix is filled in the hole of said sandwich rod (1) outer wall; The reinforcing material of said insulating cylinder (2) is alkali-free glass fibre, alkali-free glass fiber cloth, alkali-free glass fibre felt, mylar or polyester felt; Said light foam material is that density is 200 kg/m
3～300 kg/m
3Polyurethane foamed material.
2. light foam core filled composite material insulating rod according to claim 1; It is characterized in that; The inwall of said insulating cylinder (2) is provided with reinforcement (4), and said sandwich rod (1) outer wall is provided with and the close-fitting reinforcement groove of said reinforcement (4) (3).
3. the preparation method of a light foam core filled composite material insulating rod as claimed in claim 2 may further comprise the steps:
(1) preparation light foam sandwich rod: prepare light foam sandwich rod, and on its outer wall, offer reinforcement groove (3);
(2) reinforcing material is reeled: at the reinforcing material of the said light foam sandwich rod outside shop said insulating cylinder of winding number circle (2); Be filled in the said reinforcement groove (3) with prefabricated strengthening rib strip then; Continue the coiling reinforcing material again until the external diameter that reaches the insulating rod requirement, said reinforcing material is carried out vacuum drying treatment;
(3) vacuum impregnation: the reel that obtains after with above-mentioned steps (2) with epoxy resin adhesive liquid carries out vacuum-latexed to be handled, and the vacuum pressure when vacuum-latexed is handled is below 100Pa, and the impregnation time is at 90min～150min;
(4) cure and demold: the impregnation reel to obtaining after the above-mentioned steps (3) is heating and curing, and curing temperature is 80 ℃～160 ℃, and be 8h～16h curing time, and cooling after curing is accomplished, the demoulding obtain light foam core filled composite material insulating rod.
4. the preparation method of a light foam core filled composite material insulating rod as claimed in claim 2 may further comprise the steps:
(1) preparation light foam sandwich rod: prepare light foam sandwich rod, and on its outer wall, offer reinforcement groove (3);
(2) equipment of preimpregnated material manufacture: cure behind the reinforcing material epoxy resin-impregnated glue with said insulating cylinder (2), make resin be in semi-cured state, rolling obtains prepreg;
(3) prepreg is reeled: the winding number circle is filled in the reinforcement groove (3) with prefabricated strengthening rib strip through the prepreg of preheating again on said light foam sandwich rod upper berth, and the continued that is fastened coiling prepreg is until the external diameter that reaches said insulating rod requirement;
(4) solidify: the reel that obtains after the above-mentioned steps (3) is heating and curing under rotary state, and curing temperature is 80 ℃～160 ℃, and be 8h～16h curing time, and cooling after curing is accomplished obtains light foam core filled composite material insulating rod.
5. the preparation method of a light foam core filled composite material insulating rod as claimed in claim 2 may further comprise the steps:
(1) preparation light foam sandwich rod: preparation one is embedded with the light foam sandwich tube of metal mandrel, and on its outer wall, offers reinforcement groove (3);
(2) reinforcing material twines: at the reinforcing material of the light foam sandwich tube said insulating cylinder of upper berth winding number circle (2) that metal mandrel (5) is housed; Use the epoxy resin adhesive liquid for preparing to drench and soak into said reinforcing material; Be filled in the said reinforcement groove (3) with prefabricated strengthening rib strip, the reinforcing material that epoxy resin adhesive liquid has been flooded in the continuation winding is until reaching the external diameter that said insulating rod requires again;
(3) solidify: the reel that obtains after the above-mentioned steps (2) is heating and curing under rotary state, and curing temperature is 80 ℃～160 ℃, and be 8h～16h curing time, cooling after curing is accomplished;
(4) core is filled: the metal mandrel in the above-mentioned light foam sandwich tube is extracted out, filled up light foam material in the hollow position perfusion, obtain light foam core filled composite material insulating rod.
6. according to the preparation method of each described light foam core filled composite material insulating rod in the claim 3～5; It is characterized in that the said concrete operations that are heating and curing are: be heated to insulation 1.5h～2h under 80 ℃ of temperature conditions, be warmed up to 100 ℃ of insulation 1h～2h; Be warmed up to 130 ℃ of insulation 1h～2h again; Be warmed up to 145 ℃ of insulation 1.5h～4.5h again, be warmed up to 160 ℃ of insulation 4h～6h again, completion is heating and curing.
7. according to the preparation method of each described light foam core filled composite material insulating rod in the claim 3～5, it is characterized in that said epoxy resin adhesive liquid comprises:
The epoxy resin of 1000 mass parts,
The epoxide resin reactive flexibilizer of 45～55 mass parts,
The coupling agent of 10～20 mass parts,
800～1000 mass parts acid anhydrides,
The dicyandiamide of 0～40 mass parts with
The curing accelerator of 5～8 mass parts.
8. according to the preparation method of each described light foam core filled composite material insulating rod in the claim 3～5, it is characterized in that said prefabricated strengthening rib strip is polyurethane foam bar or alkali-free glass fibre reinforced epoxy based composites.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105910560A CN102136325B (en) | 2010-12-16 | 2010-12-16 | Light foam sandwich composite material insulating rod and preparation methods thereof |
| PCT/CN2011/072079 WO2012079315A1 (en) | 2010-12-16 | 2011-03-23 | Composite insulation rod with light weight foam core and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010105910560A CN102136325B (en) | 2010-12-16 | 2010-12-16 | Light foam sandwich composite material insulating rod and preparation methods thereof |
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| CN102136325A CN102136325A (en) | 2011-07-27 |
| CN102136325B true CN102136325B (en) | 2012-07-04 |
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| CN (1) | CN102136325B (en) |
| WO (1) | WO2012079315A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990940B (en) * | 2012-12-05 | 2016-12-28 | 中国商用飞机有限责任公司 | Composite stiffened liquid molding device and method |
| CN103310921B (en) * | 2013-06-14 | 2016-02-24 | 江苏神马电力股份有限公司 | With the insulator core rod manufacturing method of wire rod |
| CN103310917B (en) * | 2013-06-14 | 2016-02-24 | 江苏神马电力股份有限公司 | Core rod of insulator and the insulator with this plug |
| CN106448956A (en) * | 2016-11-14 | 2017-02-22 | 上海腾炎新材料有限公司 | Fiber-reinforced basin-type insulator for high voltage switchgear |
| CN106626536A (en) * | 2017-01-24 | 2017-05-10 | 中国人民解放军理工大学 | Reinforced composite material foam sandwich cylinder and preparation method thereof |
| CN109256245A (en) * | 2017-07-14 | 2019-01-22 | 泰科电子(上海)有限公司 | Insulator and its manufacturing method |
| CN108638536A (en) * | 2018-07-09 | 2018-10-12 | 陈照东 | A kind of foam core thin multilayer composite material tube rod part tinuous production and production technology |
| CN109152298B (en) * | 2018-09-30 | 2020-05-08 | 航天特种材料及工艺技术研究所 | Light temperature control device and manufacturing method thereof |
| CN110676001A (en) * | 2019-09-20 | 2020-01-10 | 江西华洋电瓷制造有限公司 | Composite material super-multi-shed insulator composition and manufacturing method thereof |
| CN110667135A (en) * | 2019-10-08 | 2020-01-10 | 滕州深水湾复合材料科技有限公司 | Manufacturing method of composite plate spring die pressing prefabricated body |
| CN113320190A (en) * | 2021-04-19 | 2021-08-31 | 蒋文君 | Production line and production method of high-strength ultralight insulating pipe |
| CN113930203B (en) * | 2021-10-15 | 2023-08-08 | 广东电网有限责任公司 | Adhesive with high barrier property, preparation method and application thereof in composite insulator |
| CN117264372B (en) * | 2023-11-17 | 2024-01-26 | 四川大学 | Light high-strength sandwich-structure epoxy resin foam material, reinforcing layer and preparation method thereof |
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| CN2248375Y (en) * | 1995-10-24 | 1997-02-26 | 冯海潮 | High-strength epoxy multi-layer tube |
| WO2000062309A1 (en) * | 1999-04-12 | 2000-10-19 | Abb Research Ltd. | Support insulator |
| CN2929921Y (en) * | 2006-04-12 | 2007-08-01 | 谢佐鹏 | Composite insulator cross arm |
| CN201918235U (en) * | 2010-12-16 | 2011-08-03 | 湖南厚普电力科技有限公司 | Insulating mandril made of light foam composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2243114Y (en) * | 1996-01-12 | 1996-12-18 | 东北电力试验研究院 | High-voltage composite insulation tube |
| EP1801819B1 (en) * | 2005-12-23 | 2012-05-23 | ABB Technology Ltd | A method for manufacturing a post insulator and a post insulator |
| CN101718149A (en) * | 2009-11-06 | 2010-06-02 | 常熟风范电力设备股份有限公司 | Composite material tower and manufacturing process thereof |
| CN101718151A (en) * | 2009-11-06 | 2010-06-02 | 常熟风范电力设备股份有限公司 | Composite material tower and manufacturing process thereof |
| CN101728036B (en) * | 2010-01-26 | 2011-11-23 | 陕西泰普瑞电工绝缘技术有限公司 | Method for preparing solid core rod of one-step molded high-voltage composite insulator |
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2010
- 2010-12-16 CN CN2010105910560A patent/CN102136325B/en not_active Expired - Fee Related
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2011
- 2011-03-23 WO PCT/CN2011/072079 patent/WO2012079315A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2248375Y (en) * | 1995-10-24 | 1997-02-26 | 冯海潮 | High-strength epoxy multi-layer tube |
| WO2000062309A1 (en) * | 1999-04-12 | 2000-10-19 | Abb Research Ltd. | Support insulator |
| CN2929921Y (en) * | 2006-04-12 | 2007-08-01 | 谢佐鹏 | Composite insulator cross arm |
| CN201918235U (en) * | 2010-12-16 | 2011-08-03 | 湖南厚普电力科技有限公司 | Insulating mandril made of light foam composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102136325A (en) | 2011-07-27 |
| WO2012079315A1 (en) | 2012-06-21 |
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